Transporting device and printing device

FIELD: printing industry.

SUBSTANCE: invention relates to transportation of sheets in a printing device. The device comprises a mechanism causing an object motion, a unit for collecting information related to value of mechanism excitation, a sensor to grip an object surface with the purpose to collect data of an image, a processing module to process the first data of the image and the second data of the image collected by the sensor at various moments of time, and a control unit to control the mechanism on the basis of information on motion received with the help of the processing module. At the same time the processing module cuts a template of the image of the area of the first data of the image, limits the range of searching in the second data of image, within which such information is sought for on the basis of information collected by the unit of information collection, searches for a similar area within the limited range of searching in the second data of the image and receives information on the object movement on the basis of the position link between the image template in the first data of the image and the similar area in the second data of the image.

EFFECT: invention makes it possible to move a sheet with higher speed and also to receive information on its movement for a short period of time.

15 cl, 22 dwg

 

Background of invention

The technical field to which the invention relates

This invention relates to the technical field of transport of the sheets, preferably used in a printing device.

Prior art

To the printer is subject to strict requirements associated with the print quality, and now have an additional requirement of high accuracy. Therefore, for accurate detection of movement of the sheet so as to realize stable transportation through feedback control, an attempt was made to capture the surface of the sheet by the image sensor to detect movement of the transported sheet by the image processing.

In US patent No. 7104710 described method of detecting the movement of the sheet. This method provides for multiple image capture and located on the surface of a moving sheet, the image sensor for comparing multiple images obtained by processing the agreement with the pattern for detecting the travel distance of the sheet based on the amount of moving images. The sensor of the type in which an image on the sheet is captured to obtain the image data in order to expose this data treatment is Otke image for direct detection of movement of the sheet, we will call below sensor direct action.

Sensor direct action that requires a large amount of computation required for image processing with a view to agreeing with the template. If the sensor is direct action will attempt to cope with increased speed (printing speed), this sensor direct action should detect movement in less time, which requires a processor with very large computing power. Consequently, this leads to increased cost, which leads to increasing cost of the printing device.

The invention

This invention is made to eliminate the above drawback. The objective of the invention is to further improve the commonly used device. The specific task is to develop a device that uses a sensor direct action in order to cope with the task of implementing traffic with a higher speed (accelerated the print operation)than in the conventional case. An additional objective of the invention is to develop a sensor direct action to detect information about moving for a short time, even when the processing module has less computing power than usual.

The invention that solves the above issues is a device that contains the mechanism that causes the movement of an object; the unit of data collection, which collects information relating to the magnitude of the excitation of the above-mentioned mechanism; a sensor for capturing the surface of an object to collect image data; a processing module for processing the first image data and second image data collected using the sensor at different points in time, and obtain in this way information about the moving object; and a control unit for controlling the said mechanism on the basis of the navigation information obtained by the processing module, while the processing module executes processing of: (a) cut out the template image area portion of the first image data; (b) limit the range of the search in the second image data, within which the search for such area, which is similar to the template image, on the basis of the information gathered by the unit of the information collection; (C) search mentioned a similar area within a limited search range in the second image data; and (g) information on the moving object based on the positional relationship between the template image in the first image data and referred to a similar region in the second image data.

Additional characteristics of this invention will become apparent from the following description of possible embodiments (given with reference to the accompanying drawings).

Brief description of drawings

Figure 1 presents a top view illustrating the main part of the printing device inkjet;

figure 2 presents a cross-section illustrating the printing module and the transport system;

figure 3 presents a cross-section illustrating the transport system, carrying out the transport through the tape;

figure 4 presents a schematic view illustrating the arrangement of the encoder disc and sensor rotation angle;

figure 5 presents a schematic perspective representation illustrating the construction of the printhead;

on figa and 6B presents schematic views illustrating the configuration of a sensor unit of direct action.

7 illustrates a method of calculating the distance and speed of transportation of print media information;

on Fig presents a schematic view illustrating the overlapping areas of negotiation on the image data;

figure 9 presents a block diagram illustrating the configuration of a control system of the printing device;

figure 10 presents a flowchart of the sequence of OPE the Nations, illustrating the sequence of operation of the device;

11 illustrates how the print media information is transported at appropriate stages;

on Fig presents a flowchart of the sequence of operations illustrating the sequence of detection of the actual distance of travel in example 2;

on Fig presents a schematic view illustrating a method of calculating the distance of travel for the carrier printed information;

on Fig presents a schematic view illustrating how to set search range;

Fig illustrates the process of correlation processing for the second image data;

Fig illustrates the degree of misalignment that is used to find the correlation interval;

on Fig presents a flowchart of the sequence of operations illustrating the sequence of detection of the actual distance transport;

on Fig presents a schematic view illustrating a method of calculating the distance of travel for the carrier printed information;

on Fig presents a schematic view illustrating the overlapping areas of negotiation on the image data;

on Fig presents a flowchart of the sequence of operations illustrating the sequence of detection of the actual distance protractor the Cai in example 3; and

Fig illustrates a comparative example showing the advantage of carrying out this invention.

Description of embodiments

Below, with reference to the accompanying drawings, will be described the preferred implementation of the present invention. However, constituent elements shown in the illustrated embodiments, implementation, do not limit the scope of the claims of this invention.

This invention can be widely applied in the field of motion detection for precise motion detection sheet-like object when the latter is, for example, in the printing device. The invention can be used, for example, for devices such as printer and scanner, as well as industrial and related distribution device, for example, for transporting the object intended to expose the object to various treatments in the processing module, such as control, sensing, surface treatment and marking. Furthermore, when this invention is applied to a printer, the invention can also be used not only for single-function printer, but also a multifunction printer having, for example, a copy function and a scan function of the image. The invention can be used for various who's printing methods, such as the method of ink jet printing, electrophotographic method and the method using thermal transfer.

Figure 1 presents a top view illustrating the main part of the printing device for inkjet printing as an option for implementation of the present invention. Figure 2 presents the cross-section for a detailed description of the printing module and transporting system of the printing device.

Media 8 printed information, which may be a sheet-like objects, such as sheets of paper or thin plastic plate is in the feeder 32 sheet feeder. When the printing operation is driven by the motor 35 of the paper, and its driving force is transmitted searching rollers 31, for example, via a gearbox. The rotation of the pick roller 31 causes the separation of one by one media 8 printed information from feeder 32 sheet feeder and feed inside the printing device. During this flow, the sensor 33 paper detects the presence or absence of the carrier 8 printed information, to thereby determine whether delivery of the paper. Due to the rotation of the first conveying roller 9 as a body of rotation is transporting carrier 8 printed information, which is adjacent to the first transponder is tiraumea roller 9, at a given speed in the y direction.

As shown in figure 2, after the first transporting roller 9 along the transport direction has a second transporting roller 10. Each of the respective conveying rollers is located on the upper side of the pinch roller 11 and the idler roller 12 to eject the transported media 8 printed information. The driving force of the rotation of the conveying motor 14 is transmitted through skinny mechanism on the first conveying roller 9. To the second transporting roller 10 is rotated synchronously with the first conveying roller 9, is extended synchronizing tape 15. As described above, the first transporting roller 9 located on the preceding side according to the direction of transportation, acts as the main facilitator of the roller and the sensor 18 of the angle of rotation has a design that allows the detection of the rotation of the main leading roller. In the situation that is between two rotating conveying rollers and which is located opposite the cartridge 1 with the head in the device, provided bumagoopornogo table 17, consisting of a flat plate, to support the passing of the carrier 8 of the printed information from the underside. The print area of the transported media 8 printed information and is provided so so it was parallel faces with holes emit printhead 26 to have a specified distance between them due to support from the bottom side through bumagoopornogo table 17, as described above, and bearing on the upper side due to the pressure roller 11 and the outlet roller 12. The first conveying roller 9 is bonded with coded disk 13. Front transport roller 9 and the coding disk 13 have a common axis of rotation. The sensor 18 of the angle of rotation is a means of encoding by the angle of rotation for detecting the angle of rotation of the encoder disk 13.

Figure 4 presents a schematic view illustrating the arrangement of the encoder disk 13 and the sensor 18 of the angle of rotation. On the circumference of the encoder disc 13 through the same interval provided by the slit 201. The sensor 18 of the angle of rotation is provided in the regulations, which are slit 201. The sensor 18 of the angle of rotation is translucent sensor, which detects a moving slit 201, transmitting a pulse signal at the moment of detection. With this pulse signal to detect the angle of rotation of the encoder disk 13. On the basis of the time interval, in which the transmitted pulse signal, calculates, for example, the position of the carrier printed information and the transport speed. In particular, in this embodiment, the tool codero the project by the angle of rotation, consisting of the coding disk 13 and 18 gauge rotation angle functions as a means of collecting information that is designed to collect information relating to the distance, resulting from the transporting drive roller. On the basis of the information obtained by means of collecting information that can indirectly calculate the distance of transportation and/or the transport speed of the print media information.

Figure 1 also shows that the carriage 2 is directed guide shaft 3 and resting on it, while the guide shaft 3 is provided in the device, to thereby provide a reciprocating motion in the X direction, along which extends a guide shaft 3. The force causing the movement of the carriage 2, is obtained by transferring the driving force of the electric motor 4 of the carriage, for example, the pulley 5 of the carriage, the follower pulley 6 and the synchronizing belt 7. The carriage 2 includes the sensor 30 to the original position. When the sensor 30 original position passes the locking plate 36 located in the initial position, it can detect that the carriage 2 is in its original position.

The cartridge 1 with the cylinder provided in the carriage 2 includes a print head 27 to eject ink, the effect of which is based on the method of inkjet printing, and a reservoir for che the Nile, designed for storing ink supplied to the print head 26. The design of the print head 26 provides emission as it moves together with the carriage 2 in the direction X of the ink on the medium 8 printed information, moving along the bottom, at a given point in time and based on the image signal. Figure 5 presents a schematic perspective representation illustrating part of the structure of the printhead 26. Printhead 26 used in this embodiment, includes many of electrothermal converting elements for generating thermal energy and is the mechanism through which the generated thermal energy is used to eject ink. The line 21 to emit holes located in front of the media printed information with maintaining a fixed distance between them, has a lot emitting holes 22 arranged with a given pitch. Ink supplied from the reservoir with ink, are stored in a common chamber 23 and subsequently entered into a variety of ink channels 24, communicating with a separate release holes 22 due to capillary attraction. In a separate ink channels 24 part close to throwing out the holes 22 are electrothermal converting elements 25 for generating the heat energy is I. The electrothermal converting elements 25 take the specified pulse on the basis of the image signal, and the resulting heat causes film boiling of ink in the ink channel 24. The resulting pressure foaming causes the release of a given quantity of ink through the release holes 22. Method of inkjet printing is not limited to the use of thermal energy, and may be, for example, by the method of ejection of the ink by using a piezoelectric element.

Printing device according to this variant implementation is a printing device serial type inkjet printing. The direction along which are emitting holes 22 is a direction intersecting with the movement direction of the carriage 2 (the Y direction). The image is formed on the carrier 8 of the printed information by alternately repeating the scan when printing to eject ink through the release holes 22 during the reciprocating motion of the carriage 2 and the operation of transportation for the rotation of the first conveying roller 9 and the second conveying roller 10, so as to carry out the step of transporting at a specified distance carrier printed information in the direction Y. alternatively, you can also use other ways the print when the carriage 2 performs reciprocating motion in the X direction simultaneously with a continuous and smooth transportation of print media information.

Side face of the carriage 2 has a block of 16 gauge direct action to grip the surface of the carrier 8 printed information for direct measurement of distances transportation on the basis of image processing. Block 16 gauge direct action may be provided in any position, provided that the measure covers the position where the print media information. Block 16 gauge direct action can be provided, for example, on the side bumagoopornogo table 17 shown in figure 2, for detecting the reverse side of the print media information.

On figa and 6B presents schematic views illustrating the configuration of the sensor block 16 direct action. Block 16 gauge direct action includes the light-emitting element 41 and a breathtaking image element 42, which receives light emitted from the light emitting element 41 and reflected by the media 8 printed information through the optical system 43. Breathtaking image element 42 may be a line sensor or sensor area, with many photoelectric conversion elements, such as the device C is private communication (CCD) or a device with a structure of metal-oxide-semiconductor (MOS device). It is assumed that spectacular image element 42 according to this variant implementation has a structure in which the photoelectric converting elements, each of which has horizontal and vertical dimensions of 10 μm, are two-dimensional manner so that these photoelectric converting elements provided in 11 rows in the horizontal direction and 20 columns in the vertical direction, as shown in figv. In this example, the optical system 43, and a breathtaking image element 42 is made with a magnification of x1. In particular, the region detected by the photoelectric transforming element corresponds to the area of media print information having a horizontal and a vertical length of 10 μm. Image data captured by the photoelectric converting element 42, are subjected to predetermined processing analog device 44 preliminary data processing, and then transmitted to the controller located in the housing of the printing device.

The term "collected image data" in this application means the image data, which characterize the state of the partial surface of the carrier 8 printed information and based on the input values received as a result of capture by exciting the image elements is and 42. For example, the collected image data may be information showing the shading that appears due to the shape of the surface of the carrier 8 printed information (for example, drawing the fibers of the paper or picture printed on the surface in advance).

7 illustrates a method of calculating the distance and speed of the transporting carrier 8 of the printed information using the processing module of the controller in two different time T1 and time T2, based on the image data received by the sensor block 16 direct action. The reference position 501 denotes a first image data obtained at the time T1 time due to the fact that there is detection of the transported media print information block 16 gauge direct action. Upon receipt of such data, the image processing controller module imposes region 601 negotiation on data 501 of the image. Region 601 approval of a specified size.

On Fig presents a schematic view illustrating the imposition of harmonization on data 501 of the image. In this embodiment, the area of coordination has an area of 5 pixels × 5 pixels. The characteristic pattern (cross-shaped pattern in this case), which is present on the surface of the carrier 8 printed information, place in the sphere of the agreement. After that, the processing controller module retrieves the image data in the area of harmonization, and stores this data as a template 602 approval.

7 reference position 502 denotes a second image data which is obtained due to the fact that the block 16 gauge direct action provides detection at the time T2 is the time difference from the moment of time T1, the surface of the transported print media information. The processing controller module causes sequential movement of harmonization regarding the second image data to search for and detect the position most similar to the pre-stored position of the template 602 approval. Then, on the basis of the distance L between the position of the template matching in the first data 501 of the image and the position of the template matching in the second data 502 of the image, get the travel distance within which moved the carrier 8 of the printed information from the time T1 until the time T2 time. In an alternative embodiment, the speed of movement of the carrier 8 of the printed information can also be calculated based on the difference between time T1 and time point T2 of time. In this case, and in this embodiment, to calculate the distance L faster, region, within which is called placentas is positive moving harmonization regarding the second data 502 of the image, limit. This method will be described in more detail below.

In addition to measuring the information about the movement of media print information block 16 gauge direct action can also be used for another purpose - to determine the presence or absence of print media information based on the value of the detection obtained by the block 16 gauge direct action (for example, the average value of output signals of the surrounding pixels).

Figure 9 presents a block diagram illustrating the configuration of a control system of the printing device. Shown in Fig.9, the controller 100 is a main controller of the printing device. The controller 100 has, for example, a Central processing unit (CPU) 101 in the form of a microcontroller, a persistent storage device (ROM) 103, which stores fixed data such as a program or the specified table, and random access memory (RAM) 105, which includes, for example, the area for the display of the image data and the area for work. The main computing device 110 is a device, which is connected with the outer surface of the printing device and which functions as a supply source of the image. The main computing device 110 may be a computer that prepares or processes data associated with the print, that is their as the picture, or you may be reading device for reading the image.

From the main computing device 110 to the controller 100 via an interface (if) 112 can transmit, for example, image data, a command or a status signal or to take them from the above-mentioned controller via the interface mentioned in this device. The operation unit 120 consists of a group of switches, through which is entered by an operator instruction. The operation unit 120 has a switch 122 of the power source and the switch 126 recovery, which is required, for example, the beginning of recovery absorption. Block 130 sensors consists of a group of sensors to determine the status of the device. In this embodiment, the block 130 sensors includes the above-described sensor 30 initial position sensor 33 paper, block 16 gauge direct action and the sensor 18 of the angle of rotation for detecting the distance of transportation as well as the sensor 134 temperature to detect, for example, ambient temperature.

The reference position 140 denotes a unit excitation of the head, which stimulates the electrothermal converting elements 25 of the print head 26 depending on the print data. Block 140 excitation head includes a shift register, in which the print data are arranged so the m way that is provided they meet many of the electrothermal converting elements 25, and the circuit-latch, triggered at the appropriate time. Block 140 excitation head also includes an element of the logical circuit, which is synchronized with the synchronization signal excitation actuation electrothermal converting elements 25, and module synchronization job that is designed to properly specify the time of the discharge for the purpose of regulating, for example, points on the print media information.

In the vicinity of the print head 26 is provided an auxiliary heater 142, which regulates the temperature of the print head 26 in order to stabilize the characteristics of the ink ejection. Auxiliary heater 142 may be provided on the substrate of the print head 26 in electrothermal converting element 25, or may be attached to the body of the print head 26 or cartridge, 1 printhead. The reference position 150 denotes a block of excitation of the motor, intended for the excitation of the electric motor 4 of the carriage. The reference position 160 denotes a block of excitation of the motor is intended for excitation of the motor 35 of the paper. The reference position 170 denotes a block of excitation of the motor, before oznaczony to control the excitation of the motor 14 transportation.

In the above-described printing device, the print media information is transported to the provisions of the first conveying roller 9 and the second conveying roller 10, respectively, being confined between them. You can use other transport media print information in which the media printed information is retained by the tape and wraps tape. This tape transporting mechanism has a rotating rollers provided in a multitude of positions, and the tape extending among a set of rotating rollers. The rotation of the rotating roller causes rotation of the tape, thereby causing movement of the medium to be printed on the ribbon. The means of information collection collects information relating to the angle of rotation of the rotatable roller or rotatable gears among the set of rotating rollers or gears. However, this information is not limited to information relating to only one rotating roller or only one of the rotating gears. This information may also be information regarding a variety of rotating rollers or set of rotating gears.

Figure 3 presents a schematic view illustrating the configuration of a printing device, comprising Lenton the second transporting mechanism. Figure 3 the same elements as that in figure 2, are denoted by the same reference position. Printing device includes a first conveying roller 9 and the second conveying roller 10 as a rotating rollers. The first conveying roller 9 and the second conveying roller 10 have a tape 19 passing between them. Tape 19 has a width that is larger than the width of the maximum sheet among the sheets. When the first conveying roller 9 perceives the driving force from the motor 14 transport, this transport roller 9 is rotated, causing rotation of the tape between rollers 19 in the direction shown by the arrow, and put into rotation of the second conveying roller 10. As described above, the first transporting roller 9 located on the preceding side in the conveying direction, functions as the main leader pin, and the sensor 18 of the angle of rotation detects the rotation of the main leading roller.

Tape 19 has media 8 printed information available to it in such a way that the carrier 8 of the printed information is densely Packed on the tape 19 by electrostatic adsorption. Media 8 printed information is transported in accordance with rotation of the tape 19, i.e. with the previous parties subsequent to the party to show the direction Y. Block 16 gauge direct action, provided in the carriage 2, captures the surface of the carrier 8 printed information or the belt surface 19, thereby collecting the image data. Sensor direct action may be provided on the back side of the tape to detect the inner surface of the tape. Media 8 printed information is held firmly on the tape 19 by electrostatic adsorption, and therefore, essentially, can't slide or fall off of the tape 19. Thus, engagement of the tape 19 to calculate the motion of the tape is equivalent to calculating the movement of the carrier 8 of the printed information.

Next, the following section will describe the method of using this device at a higher speed than in the conventional case, by using the information on transport, received from the sensor 18 of the angle of rotation, and information on transport, received from the sensor block 16 direct action, in accordance with several examples.

Example 1

Figure 10 presents a flowchart of the sequence of operations illustrating processing performed by the CPU 101 in the management of transportation of print media information in this embodiment. 11 illustrates the state of transportation of print media information at the appropriate stage, p is shown in the block diagram of the sequence of operations.

When the printing operation starts based on the commands start printing from the main computing device 110, the CPU 101 provides the excitation of the motor 35 paper with the purpose of giving one carrier 8 printed information from the feeder 32 for sheet feeding (step 1). Next, in step 2, the CPU 101 must determine, found the sensor 33 of the paper end of the carrier 8 printed information or not. When it is determined that the end of the carrier 8 of the printed information is detected, the processing goes to step 3. When it is determined that the end of the carrier 8 of the printed information is not detected in step 2, the processing is returned to step 1, and the operation of the paper feed continues. After that step 1 and step 2 are repeated as long as the detected carrier 8 of the printed information. State And figure 11 represents a state in which the end of the medium 8 printed information reaches a position directly in front of the sensor 33 of the paper.

In step 3, the CPU 101 starts the excitation of the motor 14 transportation and at the same time using 18 gauge rotation angle starts detecting the angle of rotation of the encoder disk 13. As a result, the carrier 8 of the printed information is transported in the Y direction on the basis of information from the sensor 18 of the angle of rotation. This will be specifically explained below. The CPU 101 determines maliciously rotation and speed of rotation of the transporting roller 9 at the time, when the sensor 18 of the angle of rotation detects the slit formed in the encoding disk 13. Then, the control unit controls the transportation of feedback on this actual measured value when the excitation of the motor 14 transportation.

Next, in step 4, the CPU 101 determines discovered in block 16 gauge direct action media 8 printed information or not. When it is determined that the block 16 gauge direct action has detected the carrier 8 of the printed information, the processing goes to step 5, and implemented the workflow actually measured values (which will be described below). On the other hand, when it is determined that the block 16 gauge direct action have not found media 8 printed information, the processing is returned to step 3. Then step 3 and step 4 are repeated as long as the block 16 gauge direct action does not detect the carrier 8 of the printed information. The condition In figure 11 represents the state of transportation before the point in time when the end of the carrier 8 printed information detected by the sensor block 16 direct action. The state represents a state in which the end of the medium 8 printed information detected by the sensor block 16 direct action and implemented by a sequence of detection of the actual values of the transport distance.

Figure 10 also shows that when the sequence of detection of the actual value of the distance of transport under step 5 gives the actual value of the distance of transportation (i.e. 130 μm), the CPU 101 compares this value with the measured and stored by means of the angle sensor value of distance transportation (for example, 120 μm), to thereby determine whether the amount of movement between them, which is equal to the allowable range or exceeds it or not. When the amount of movement is within the allowable range, the processing goes to step 7. On the other hand, when the amount of movement exceeds the allowable range, the processing goes to step 10 for the implementation of the correction processing corresponding to the amount of movement. In this example, the displacement is 10 μm, and implemented corrective processing corresponding to 10 μm. This correction processing can be achieved by shifting the time of stopping the operation of transportation to regulate the distance of transportation by transportation execution again or by moving the print data in the Y direction without changing the transportation of print media information. Alternatively, in the case of configuration, etc is where the position of the carriage 2 or the print head can be accurately moved in the Y direction, you can also move the carriage 2 or the printhead. After completion of the adjustment processing, the processing goes to step 7.

At step 7, the CPU 101 uses the printhead 26 to implement a printing operation of one line on the basis of the image data, causing the carriage 2 to move in the direction X. Then, in step 8, the CPU 101 determines that the finished print image data for one page or not. When it is determined that there are still not printed image data, the processing returns to step 5 to put the following line to the effect of the sequence of detection of the actual value of the transport distance. In step 8 the sequence of detection of the actual value of the distance of transportation and the printing operation described above is repeated until, until completing the printing of image data for one page. D figure 11 represents the state of the final stage, which uses sensor 18 of the angle of rotation receive information concerning the magnitude of distance transportation. If step 8 is determined that the print image data for one page is completed, then in step 9, the processed output paper, and the whole process is completed. State E figure 11 represents the state, to which m is an output action of the paper.

Next, the following section will detail the sequence of detection of the actual distance transport, carried out in step 5. On Fig presents a flowchart of the sequence of operations illustrating respective steps of a sequence of detection of the actual transport distance. On Fig presents a schematic view that illustrates carried out on the basis of the image data received from the sensor block 16 direct action, a method of calculating information relating to the movement of the carrier 8 printed information (magnitude or velocity). Description the following section will be described with reference to Fig and Fig.

When the sequence of detection of the actual transport distance, the CPU 101 at step A01 uses block 16 gauge direct action to collect image data of the carrier 8 printed information as the first data (1501) of the image. When the block 16 gauge direct action in the configuration according to figure 3 is used to display the surface of the belt 19, the first image data and second image data represent an image of the surface of the tape.

The CPU 101 at step A02 is the location of harmonization that has an area of 5 pixels × 5 pixels, in a suitable position on the Auron, prior to the first data 1501 image. On Fig shows an example in which the region 1502 negotiation placed in such a way that its characteristic pattern (cross-shaped pattern in this case), which is present on the surface of the carrier 8 of the printed information. Cruciform pattern is simply a conditional template for illustration, and it is not always used in a real case. After that, the CPU 101 retrieves the image data enclosed in harmonization, and stores this data as a template matching portion of the template image in the first image data). As described above, the processing at step A02 - processing for cutting the template image area portion of the first image data.

At step A03 is based on information from the sensor 18 of the angle of rotation (i.e., the value actually measured the distance travelled transport, received from the sensor 18 of the angle of rotation) transport media 8 printed information on the target distance (move one step in the Y direction, and the value of distance transportation (travel distance) is maintained. This example assumes that the value actually measured the distance travelled transport, received from the sensor 18 of the rotation angle is 120 μm.

On the floor is PE a CPU 101 uses the block 16 gauge direct action to obtain the image carrier 8 print information (or tape 19) as the second data (1503) image at time, different from the time of collection of the first image data.

On stage A is based on the amount (120 μm) covered distance transportation that you saved in step A03, the task pane (search range), which is intended for processing for search template matching second data 1503 image and which is a limited area in the entire field of the image.

On Fig presents a schematic view for concrete illustrations of how to set search range. On Fig shown that the pattern matching is within the first data 1501 image areas from line P to line I. on the other hand, the region of 120 μm forward in the Y direction is identified by the position 1601, from line D to line N. In particular, the region 1502 within the first image data, in which the cut out template matching, is estimated as moving to the area 1504 within the second image data. Under the assumption that the error precision of transportation is about ±10 μm for the target value of the covered distance transportation, the area within which may be placed the template matching is a region denoted by the reference position 1602, from line to line I. In this example, to implement the TB adjustment processing in the range essentially, which includes this area 1602, as a search range set region 1603, which also borders on the order of 10 microns (one pixel) on the preceding side and succeeding side (the area shaded with diagonal lines) in relation to the field 1602.

The reason that the search range is relative to estimated area 1504, not only in the Y-direction but also in the X direction, is that when the media printed information is transported in the Y direction, it may happen that the print media will not be able to move in the Y direction and it will be possible offset in the X direction (the phenomenon of positional deviation). Taking into account the phenomenon of positional deviation provides limited scope as a range of computing search around the estimated area 1504, so this limited region includes a boundary corresponding to the specified number of pixels in the direction X and the direction Y. This range may be determined appropriately according to, for example, from the precision of transportation or the print resolution of the printing device or the size of an exciting picture element (photometric conversion element), and is not limited to the above value.

As described to enter the, during the treatment according to the stage A, the area within which searches similar region in the second image data, which is similar to the template image, carved from the first image data is restricted based on the information collected through the means of encoding the angle of rotation (data collection tools). In particular, as the search range of the second image data is set to a region surrounding the estimated position, remote from the pattern image of the first image data on the travel distance from the time when the first image data have been estimated based on information collected using the data collection tools, before the time of collecting the second image data. The search range is set as a region obtained by adding to the estimated position of a given number of pixels on the preceding side and succeeding side according to the direction of movement of the carrier printed information, as well as adding the specified number of pixels to the left and right sides in the width direction of the print media information that is perpendicular to the direction of movement.

At step A06 the search range set on the stage A subjected to the correlation computing processing in order from the end pixel. When printing handling the ke at step A06 applied to the second image data searches similar area, which is similar to the template image, carved from the first image data in a limited range (1603) search, as described above.

Fig illustrates the placement region 1601 negotiation in the search range, obtained in step A to expose the second data 1503 image correlation processing. First region 1502 negotiation placed in position in line and the first (upper left) column and calculates the degree of similarity.

In this case, the degree of similarity is calculated, for example, using the sum of absolute values of differences. The sum of absolute values of differences sets the degree S of the error, which is obtained as the sum of absolute values of differences between each pixel f(I, j) in the template matching, and each pixel g(I, j) in the field of negotiation. With regard to the sum of absolute values of differences, the smaller the degree of mismatch, the greater the degree of similarity.

Fig illustrates an example of template matching and degrees of misalignment of harmonization when the search is performed in the field from the first column to the seventh column in the row C. it is Assumed that the image contains binary image data. The pixel, which has the template (i.e. the pixel is included in a cruciform part), denoted by 1 and the pixel in which no pattern is marked 0. If pre is put, the area of coordination has original position in the row and fourth column, we can understand that the pattern matching that you saved in step A02, consistent with the pattern placed in the region 1502 approval, and get the lowest degree of mismatch is 0. Thus, this position is defined as a position of negotiation and is obtained by the correlation computing processing in step A06.

On stage a on the basis of the relative positional relationship between the design approval obtained at step A06, and agreeing that you saved in step A02 (difference in number of pixels), calculate the actual distance you want to move on operations transportation as determined in step A03. In particular, the process according to the stage a calculates the navigation information on the basis of the positional relation (or interval) between the template image, the crop of the first image data, and the most similar region in the second image data. If according to this example, the positional relationship corresponds to 13 pixels in the Y direction, and therefore the actual value of the distance of movement of the print media information is 130 μm. Then the sequence of detection of the actual value of the transportation distances in step 5 according to figure 10 ends./p>

As described above, the target area correlation computation processing is reduced and the amount of computation is significantly reduced by setting the search range, which is limited based on the amount of distance traveled transportation, obtained from the data collection tools (means of coding angle of rotation), designed to collect information concerning the magnitude of the excitation mechanism. In the case when using the conventional method, in the exercise of which the range for correlation processing covers all the field of the second data 1503 image, the correction calculation should be 16×7=112 times, as shown Fig. In contrast, in this example, the area within which the search is conducted is limited, therefore the number of calculations is reduced to 35, thereby reducing the amount of computation to approximately 1/3 of the volume of calculations according to regular occasion. Thus, information about movement can be detected faster, and you can also get high-speed transportation faster than in the normal case (i.e. to carry out a printing operation with greater speed). In other words, information about movement can be detected even when the CPU of the controller has less computing power than in the normal case, which leads to cost reduction n the implementation of the controller.

In this example, the means of collecting information receives information concerning the magnitude of the excitation transporting mechanism from the value of the output signal means of coding by the angle of rotation. This information functions as a key to assess where the second image data is template matching, cut from the first image data. However, the invention is not limited, and you can also use a different configuration. For example, if the motor 14 transport is a stepper motor, the magnitude of the excitation can be estimated on the basis of the number of excitation pulses. On the basis of the number of excitation pulses estimate the distance between the point in time of receiving the first image data and the time of obtaining the second image data. Based on this estimated distance of travel define the scope of the search. In particular, the means of collecting information takes the value obtained on the basis of the number of excitation pulses of the stepping motor of the drive mechanism, as information concerning the magnitude of the excitation.

You can also use any other method for collecting information relating to the magnitude of the excitation transporting mechanism, by collecting this information on the basis of a the first control value in the management of transportation at one stage during the transport control in the controller. On the basis of the target control values estimate the distance between the point in time of receiving the first image data and the time of obtaining the second image data. Based on this estimated distance of travel define the scope of the search and the time of obtaining the second image data. In particular, the means of collecting information takes the value obtained on the basis of the target control value in a control block for controlling the excitation of the drive mechanism, as information concerning the magnitude of the excitation.

Correlation processing to implement the comparison of singular points on the image captured by the sensor block direct action, not limited to the configuration involving the use of a structured image described above. For example, you can use a different configuration in which information relating to the reflected light received from the sensor block direct action, is subjected to Fourier transformation, and information from other points in time, controlling for agreement in connection with each frequency. Alternatively, you can also obtain the distance between the parts of the peaks. Alternatively, you can also compare, for example, patterns in the form of specks, obul the pour interference with the reflected light from the coherent light source. In any of these ways should be used as a tool for correlation processing, which may make the comparison between the characteristic points of the image data of two types.

Example 2

In example 1, was introduced for the case when the target value of distance transportation (per transaction stepper transportation) is smaller than the detection area of an exciting element unit 16 gauge direct action, and one of the characteristic pattern is included in both of the two pieces of image data collected at different points in time. In contrast, in example 2 presents a control method for the case when the value of one of the studied step of transporting more than the length of the grouped pixels obtained by block 16 gauge direct action. The basic idea of this method is that the collection of many pieces of data occurs in one step move, and manage transportation.

The device in example 2 is the same as in example 1. The entire sequence is the same as described in the block diagram of the sequence of operations according to figure 10, except that the method of realization of the sequence of detection of the actual value of the transportation distances in step 5 is different from that is described in example 1. On Fig presents a flowchart of the sequence of operations illustrating the sequence of detection of the actual transport distance in this example. On Fig presents a schematic view illustrating a method of calculating the distance and/or speed of moving object 8 to be printed information on the basis of image data received from the sensor block 16 direct action.

When the sequence of detection of the actual transport distance, the CPU 101 at step V uses block 16 gauge direct action to collect image data of the carrier 8 printed information as the first data (2101) of the image. When the block 16 gauge direct action in the configuration according to figure 3 is used to capture the surface of the belt 19, the first image data and a subsequent second image data represent an image of the surface of the tape.

On stage W CPU 101 causes the positioning harmonization that has an area of 5 pixels × 5 pixels, in a suitable position on the side, next after the first data 2101 image. On Fig shows an example in which the area of negotiation placed in such a way that its characteristic pattern (cross-shaped pattern in this case), which is present on the surface of the carrier 8 of the printed information is I. After that, the CPU 101 retrieves the image data enclosed in harmonization, and stores this data as a template matching the template image in the first part of the image data).

On stage W begins based on information from the sensor 18 of the angle of rotation (i.e., the value actually measured the distance travelled transport, received from the sensor 18 of the angle of rotation) transport media 8 printed information in the y direction.

When the specified time or the specified count value is less than the last one stepper move, block 16 gauge direct action is used in step V during operations transportation for collecting image data of the carrier 8 printed information (or tape 19) as the second data (2103) image.

On stage W, based on the values passed transportation distances calculated in the collection of the second data 2103 image, specify a limited search range in the second image data. How to set search range is the same as in example 1, and therefore are additionally described will not.

On stage W, the search range set on the stage W, is subjected to the correlation computing processing in order from the end pixel. Specific computational algorithm used is th in this example, is the same as the algorithm in example 1 described in relation Fig and Fig, and therefore, in addition will not be described. Due to the correlation computing processing stage V position harmonization, in which the degree of similarity is the highest, is obtained as a result of the correlation processing.

On stage W, on the basis of the processing result according to the stage V, calculate and retain the actually measured distance of movement of the print media information transported between stages V to stage V. In this example, the stages from stage V to stage V repeated until such time as the total transport distance of the medium of the printed information will not reach the target value of the transport distance corresponding to one step movement. On stage W remembered information actually measured values of the distance of travel in each different area.

On stage W determine as to whether pocituvame value transportation distances determined by the sensor 18 of the angle of rotation from step B, the target value or not. When it is determined that pocituvame value has not reached the target value, the processing goes to step 10. On stage 10, the second data 2103 images collected at the stage V rely first and the image data. Then, in connection with these image data, the region 2102 approval is placed in a suitable position with the previous hand, as on the stage W.

On Fig shows an example in which the region 2102 negotiation placed in such a way that its characteristic pattern (four-point pattern in this case), which is present on the carrier 8 of the printed information. Then the image data is included in the scope of approval, are extracted, and these data are stored as template matching.

After that, the processing returns to step V to implement the processing as described above, on the basis of the newly saved template matching. Up until the stage W not confirmed, that the value of the distance of transportation will not reach the target value of the transport distance corresponding to one step movement, the media, the printed information is transported, and the steps from step V to stage V again. When on stage W confirmed that the value of the distance of transportation has reached the target value, the processing goes to step W.

On stage W calculate the sum of many actually measured distance move, which whenever you step V, and this sum is set as the sum of the actual distance traveled. Then about abode proceeds to step 6 in the block diagram of the sequence of operations, shown in figure 10. Processing after step 6 are the same as in example 1, and therefore are additionally described will not.

In accordance with this example, even when the magnitude of the distance traveled in one operation transportation (target value of distance of transportation of print media information are greater than the detection area of the sensor block 16 direct action, many parts of the travel distance detected during a single operation of transportation, resulting in detection of the distance to move, and this results in the transport controls. As a result, even when the block 16 gauge direct action has a small exciting element to accurately collect information on the movement. This example is applicable to a printer that performs a printing operation while continuously transporting the print media information in the y direction.

Example 3

In example 1 and example 2, it was assumed case where the target value of distance transportation (per transaction stepper transportation) is smaller than the detection area of an exciting element unit 16 gauge direct action. On the other hand, in example 3 presents a control method for the case where even in the middle of a single print job is acceptable, the search range is within the range of the second image data or not within this range.

The device in this example has the same construction as in example 1. The entire sequence is the same as described in the block diagram of the sequence of operations according to figure 10, except that the method of realization of the sequence of detection of the actual value of the transportation distances in step 5 is different from that which was discussed in example 1. On Fig presents a flowchart of the sequence of operations illustrating the sequence of detection of the actual transport distance in this example.

When the sequence of detection of the actual transport distance, the CPU 101 at step D01 first uses block 16 gauge direct action to collect image data of the carrier 8 printed information as the first image data. When the block 16 gauge direct action in the configuration according to figure 3 is used to capture the surface of the belt 19, the first image data and a subsequent second image data represent an image of the surface of the tape.

Next, the CPU 101 at step D02 places area agreement, having an area of 5 pixels × 5 pixels, in a suitable position on the side of the preceding first image data. After that, the CPU 101 retrieves the image data enclosed in the areas of coordination, and maintaining the t of these data as template matching template image part of the first image data). Further processing is the same as in examples 1 and 2.

Next, at step D03, the CPU 101 determines whether the image data enclosed in the area of negotiation that you saved in step D02, outside the detection area of the sensor block 16 direct action because of the following operation distance transportation with the target value or not. When it is determined that the image data will not go beyond the detection area, the processing proceeds to step D04 to implement the sequence A. Sequence And is the same as the steps from step A03 to stage a in the block diagram of the sequence of operations according Fig described in example 1.

On the other hand, when it is determined that the image data will be beyond detection due to the following operations, transportation, processing proceeds to step D05 to implement sequences Century the Sequence is the same as the steps from step V to stage V in the block diagram of the sequence of operations according Fig described in example 2. After receiving the results of gathering information about the respective actual values of distance transportation, processing returns to step 6 according to figure 10.

In accordance with this example, even when the specified search range is within the range of the and the second image data or go beyond it, it is possible to accurately collect information about the movement.

Although this invention is described with reference to possible embodiments of, it should be clear that the invention is not limited to the described possible ways of implementation. The volume of claims the following claims should be considered as an appropriate interpretation in the broadest sense and encompasses all such modifications, equivalent structures and functions.

1. The device, containing
the mechanism that causes the movement of an object,
the unit of data collection, which collects information relating to the magnitude of the excitation of the above-mentioned mechanism,
a sensor for capturing the surface of an object to collect the image data,
a processing module for processing the first image data and second image data collected using the sensor at different points in time, and obtain in this way information about the moving object, and
a control unit for controlling the said mechanism on the basis of the navigation information obtained through the aforementioned processing module,
when the processing module executes processing:
(a) cutting template image area portion of the first image data;
(b) limitation of the search range in the second image data within it is that the search for such area, which is similar to the template image, on the basis of information collected by the said block of information gathering;
(C) search mentioned a similar area within a limited search range in the second image data; and
(g) information on the moving object based on the positional relationship between the template image in the first image data and referred to a similar region in the second image data.

2. The device according to claim 1, in which
mentioned processing module as a limited search range in the second image area defines the range around the estimated position spaced from the position of the pattern image of the first image data, distance move, which is estimated on the basis of information collected by the said block of information gathering, and which is caused during the period from the time of collection of the first image data before the time of collecting the second image data.

3. The device according to claim 2, in which
mentioned processing module as a limited search range specifies the area obtained by adding the specified number of pixels to preceding side and succeeding side in the direction of movement of the object relative to the estimated position.

4. The device according to claim 3, in which mentioned processing module as a limited search range specifies the area obtained by further adding the specified number of pixels to both sides under the direction perpendicular to the direction of movement of the object relative to the estimated position.

5. The device according to claim 1, in which
referred to the unit of data collection is an encoder for detecting the magnitude of the excitation mechanisms, and information regarding the magnitude of the excitation is a value obtained based on the output signals from the means of encoding during the period from the time of capture of the first image until the time of capture of the second image.

6. The device according to claim 1, in which
referred to the unit of data collection takes the value obtained on the basis of the target control value in the above-mentioned control unit, as information concerning the magnitude of the excitation.

7. The device according to claim 1, in which
the above mechanism has a stepping motor, and the said block data collection takes the value obtained on the basis of the number of excitation pulses of the stepping motor, as information concerning the magnitude of the excitation.

8. The device according to claim 1, in which
the aforementioned control unit panel which provides excitation mechanisms on the basis of the profile of the excitation, and
referred to the unit of data collection takes the value obtained on the basis of the profile of the excitation, as information concerning the magnitude of the excitation.

9. The device according to claim 1, in which
the above mechanism has a roller to which a driving force is applied, and the unit of data collection receives information relating to the value of the angle of rotation of the roller.

10. The device according to claim 9, in which
the above mechanism has cushions available in many provisions, and the tape stretched among a set of rollers, and the rotation of the rollers causes the rotation of the tape, thereby causing movement of the object, located on the ribbon, and referred to the unit of data collection receives information relating to the value of the angle of rotation of the roller among a set of rollers.

11. The device according to claim 1, in which
the sensor is a sensor field so that many photoelectric conversion elements are two-dimensional manner.

12. The device according to claim 1, additionally containing the printing unit having a print head for printing on the object that serves as a carrier for printed information.

13. The device according to claim 1, additionally containing the printing unit having a print head for printing on the print media information, and the object is Soboh the tape, serves as part of the mechanism that transports the print media information supporting this kind of media print information.

14. The device according to item 12, which during the period between collection of the first image data and collecting the second image data carrier printed information is subject stepper transportation to the distance with the target value, and walking transportation and printing by the printhead alternately repeated to perform the print operation.

15. The device according to item 12, in which the print media information is transported continuously, and transportation and the printing by the print head are performed simultaneously.



 

Same patents:

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19 cl, 21 dwg

FIELD: printing industry.

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22 cl, 28 dwg

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47 cl, 6 dwg

Ink cartridge // 2415022

FIELD: printing industry.

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22 cl, 33 dwg

FIELD: printing industry.

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6 cl, 37 dwg

FIELD: printing industry.

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6 cl, 37 dwg

FIELD: printing industry.

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12 cl, 14 dwg

FIELD: printing industry.

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12 cl, 14 dwg

FIELD: measuring technique.

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24 cl, 9 dwg

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11 cl, 8 dwg

FIELD: the group of inventions refers to automatic bank machines.

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61 cl, 10 dwg

FIELD: printing industry; production of the thermographic printers.

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EFFECT: the invention allows do not use the microprocessor on the tape cassette, to transmit the information without losses, to provide the recording of the changeable information back in the store and to introduce the information with the high density.

27 cl, 9 dwg

FIELD: mechanical engineering.

SUBSTANCE: guiding bearings comprises four bearings, with each of two one-sided end bearings mounting on the part along the diagonal with respect to each other.

EFFECT: simplified structure.

4 dwg

Printing device // 2256560

FIELD: printing devices.

SUBSTANCE: device has feeding section, meant for feeding paper for printing one sheet after another separately, and transporting route, passing, actually, linearly for transporting printed data carrier, having high rigidity. A portion of feeding section is overlapped with transporting route in vertical transverse direction, but does not in direction, perpendicular to direction of transporting of carrier of printed information.

EFFECT: simplified construction, lower costs, higher reliability, broader functional capabilities.

18 cl, 22 dwg

The printing device // 2026795

Printing device // 2256560

FIELD: printing devices.

SUBSTANCE: device has feeding section, meant for feeding paper for printing one sheet after another separately, and transporting route, passing, actually, linearly for transporting printed data carrier, having high rigidity. A portion of feeding section is overlapped with transporting route in vertical transverse direction, but does not in direction, perpendicular to direction of transporting of carrier of printed information.

EFFECT: simplified construction, lower costs, higher reliability, broader functional capabilities.

18 cl, 22 dwg

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