Device for measuring parameters of threaded piping articles
FIELD: measuring engineering.
SUBSTANCE: device comprises light source and light receiver provided with means for processing information. The light source and receiver are made in block that is made of a tube. The scanning unit is provided with two channels optically connected with the tube and system of mirrors, which allow the light to pass from the tube to the outer or inner surface of the article through the channels. The scanning unit is optically connected with the tube so that the optical axis of one of the channels is in coincidence with the optical axis of the tube.
EFFECT: expanded functional capabilities.
8 cl, 1 dwg
The invention relates to the field of measuring and control technology and can be used when performing contactless control of quality of manufacturing, and also in the process of preventive inspection of threaded products, for example to control the threaded connections of the pipes used in the installations of the oil and gas industry.
The known device for contactless control of the parameters of the threaded sections of pipe with male thread, using various optical methods of analysis of black and white or diffraction patterns obtained at the position of the light source and photodetector devices on opposite sides of the object. At the same time using various optoelectronic devices, such as coherent light sources (lasers) and photodetector (SU 1288501, 1985; SU 1368629, 1986).
The main disadvantage of known devices is the inability to control the geometric parameters of the internal surface of the threaded pipe part or internal thread.
Closest to the claimed technical solution is the device control parameters threaded pipe section with an external thread that contains the source of the light flux, the receiver of the light flux with the means of information processing and the scanner unit, connected with a coordinate table and the implementation of the tion with the possibility of reciprocating and rotational motion (RU # 19916, 2001).
The specified technical solution provides for the use of triangulation shadow of the method of measuring the geometrical parameters of the profile of the external thread and method of the light spot during the inspection of the inner surface of the threaded pipe part, which is for fixing the shadow and light images used in triangulation methods for calculation of the geometrical parameters, the use of coherent radiation source (laser) and photodetector matrix.
The specified technical solution allows to solve the problem of estimation of geometrical parameters of the outer thread, but it has some significant drawbacks, such as the need for strict orientation of the light beam along the threads to control external thread. This is due to the fact that using the shadow method leads to increased demands for stabilization of controlled items in the measurement process. In addition, the control of the internal diameter of the tubular part with an external thread is essentially impossible, because it is possible only in a limited area adjacent to the pipe end. Moreover, triangulation methods of estimating geometrical parameters of the thread as in the analysis of shadow and light spots, or have limitations on the accuracy of the performed measurements and to control the surface condition of the material p is sirovoi details that is one of the important elements of health threaded connections.
The task, which directed the claimed technical solution is to extend the functionality of the device by providing a control as outer and inner surfaces, to increase the accuracy of the measuring process by reducing the dependence of the accuracy of measurement of parameters of threaded products from the accuracy of its positioning relative to the measuring instrument, as well as in raising awareness of control due to the possibility of determining parameters such as the surface roughness of the thread, the wall thickness of under or over the thread, the alignment thread both ends of the coupling, as well as providing the possibility of automating the process and reducing the time control.
The problem is solved by a device for monitoring the parameters of the threaded tubular products containing the source of the light flux, the receiver of the light flux with the means of information processing and the scanner unit associated with a coordinate table and made with the possibility of reciprocating and rotational motion, which is characterized by the fact that the source of the light flux and the receiver of the light flux with the means of information processing functionally together what s in a single unit, made in the form of conoscope, and the scanner unit made from at least two optically associated with conoscope channels, and a system of mirrors, ensuring the passage of the light flux from conoscope through the channels to the outer or inner surface products. When the scanner unit is optically connected with conoscope so that the optical axis of one of the channels coincides with the optical axis of conoscope. In addition, the scanner unit may be made so that its axis of rotation coincides with the optical axis of one of the channels.
The problem is solved also by the fact that the scanner unit is made in the form connected with a coordinate table via the node rotation of the plug that is installed with the possibility of setting controlled inner and outer surfaces of the product, the teeth of which is maintained open channels, for passing the light flux from conoscope to the outer and inner surfaces of the product, a system of mirrors placed in these channels with the possibility of overlapping channels.
The problem is solved also by the fact that the fork channels optically connected with conoscope so that the axis of the channel of one of its teeth coincides with the optical axis of conoscope, as well as the fact that the axis of rotation of the plug coincides with the optical axis of conoscope. When this mirror is made with the possibility of changing his position.
The task is asaeda the the device for monitoring the parameters of the threaded tubular products supplied blocks alignment and calibration, and the XY table is equipped with a control system that includes modules for linear and circular motion, to provide reciprocating and circular motion of the scanner unit.
In the invention used monoskop known as a device for measuring the linear parameters of different objects, based on the analysis of traces obtained during the passage of the reflected coherent light in duplicateable the crystal (see U.S. patent 6953137, NCI 359/30, U.S. patent 4976504 and EP 0376837 by MCI G 03 H 1/06).
The invention is illustrated by the drawing, which shows the inventive device in the section.
Device for monitoring the parameters of threaded tubulars consists of a scanner unit and tools for information retrieval. Node 1 scan connected through node 2 rotation and a housing 3 with a coordinate table 4, providing reciprocating motion. Tool for information retrieval is executed in the form of conoscope 5, functionally uniting in a single source block and the receiver of the light flux with the means of information processing. Monoskop allows contactless method of measuring parameters of the test object by the focused laser beam, due to which there is no n the need to separate the application of the radiation source and the receiver. Case 3 is rigidly connected with a coordinate table 4, providing reciprocating movement conoscope 5 and node 1 scan relative to the test object 6, is installed on the node-based products, which is not shown. Node 2 rotation provides rotational movement of node 1 scan relative to the test object 6. Node 2 rotation associated with the drive and the necessary control systems of rotation and displacement of node 1 scan (not shown)that provides the latest controlled reciprocating and rotational movement relative to the product.
As one option, the node 1 scan is made in the form of a fork with at least two prongs 7 and 8, which are made open light channels 9 and 10. The system of mirrors 11 and 12 allows passage of the light flux from conoscope 5 through the openings 13 and 14 in the teeth 7 and 8 of the fork to the controlled product 6, or more precisely to its outer or inner surface. Light channel in one of the teeth, for example, channel 10, is made so that its optical axis coincides with the axis of rotation of node 1 and scanning with the optical axis 15 conoscope 5. The longitudinal axis 16 of the product 6 may coincide with the axis of rotation of node 1 scanning and optical axis 15 conoscope 5. Luminous flux from conoscope 5 through the mirror 12 can be napravleno light channel 9 to the outer surface of the test object 6, as shown in the drawing. By changing the position of mirror 12 luminous flux is directed through the channel 10 to the inner surface 6. Thus, the mirror 12 is made movable relative to the optical axis 15 conoscope 5 and has two operating positions, namely the position of the mirror 12 is output from the light flux of conoscope 5, in this case, the luminous flux is directed along the light channel 10 to the inner surface 6. In position (b) mirror 12 overlaps the channel 10 and is installed at an angle to the optical axis 15 conoscope 5 and luminous flux is directed to the outer side of the device 6 through the light channel 9. The mechanism of rotation of the mirror 12 is not shown. Mirrors 11 and 12 is arranged to change its position. The x-y table 4 is also the management system contains modules for linear and circular motion to ensure reciprocating and circular motion of the scanner unit, and blocks alignment and calibration (not shown).
The workflow control parameters threaded tubular products using the inventive device consists of the following steps. Controlled threaded pipe product 6 is fixed in the node-based (not shown).
The node-based and the control device are installed in the immediate vicinity of the Rog from each other. The device is through the use of conoscope allows to obtain a high accuracy of measurement even when the longitudinal axis of the product 6, the axis of rotation of node 1 scan and the direction of the reciprocating motion of node 1 scan offset relative to each other, while in the known devices, when the receiver and the source of the light flux on opposite sides of the product to the accuracy of their positioning are applied stringent requirements.
At the beginning of the measurement device for control is in one extreme position remote from the controlled product that is outside the dimensions of the device and, in fact, node 1 scan. Scanning threaded tubular goods performed in the following sequence.
In the process of measurement of thread parameters of the test object 6 is moved along the longitudinal axis 16 node 1 scan in the direction of the test object 6. During the movement of the coordinate table 4 scans the inner surface 6, if the mirror 12 is in position (a), or its outer surface, if the mirror 12 is in position (b). The drawing shows an example of the time scanning the outer surface of the product 6, when it is at the working position relative to the hardware device in the process control threaded section L product 6.
Then perform a return movement of node 1 scan starting position. During return movement scan the other surface of the product during the translation of the mirror 12 in position (a), because the original was the position (b).
The advantage of the inventive device before all is known is that the measurement accuracy does not depend on the accuracy of the orientation position of the longitudinal axis 16 of the product 6, the axis of rotation of node 1 scan and the direction of reciprocating movement of node 1 and their Pets deviation. The device involves the alignment, but valid and the deviation from it.
Subsequent cycles of scanning the inner and outer surfaces of the test object 6 is carried out by sequential rotation of node 1 scan at a certain angle around the longitudinal axis 16 of the product. Scanning the two surfaces of the test object according to one clipping plane for one cycle of the reciprocating motion and sequential step-by-step rotation of the optical instrument on the 360° provide the ability to create mathematical models of the controlled area of the threaded tubular goods. Thus the mathematical model of the controlled products may be generated when a deviation from the axial location of the test object against the sustained fashion to the optical axis of the claimed device, that allows to reduce the requirements to the positioning of the test object and to automate the verification process.
And software of computer software, which is equipped with the inventive device provides a comparison of the mathematical model of the controlled threaded tubular goods with virtual caliber, made in accordance with GOST specific threaded connection. Qualitative and quantitative comparison of virtual models of caliber and controlled product and is the main end result of the control parameters of threaded tubulars with the use of the claimed device.
This invention can be used to control the complete set of parameters characterizing the quality of threaded connections in accordance with the applicable state Standards. The proposed device allows you to automate the process control to improve the control accuracy, which in turn will increase the reliability of installations using threaded products.
The inventive device can be widely used in industrial production of pipes of various sizes, in particular in the manufacture of casing, drilling and tubing used in oil and hazardrelated. In addition, the invention allows to perform preventive evaluation of the ability of these tubes at the tube bases of drilling and oil and gas industries practically in the field.
1. Device for controlling a threaded tubular products containing the source of the light flux, the receiver of the light flux with the means of information processing and the scanner unit, connected with a coordinate table and made with the possibility of reciprocating and rotational motion, wherein the source of the light flux and the receiver of the light flux with the means of information processing are combined in a single unit, made in the form of conoscope, and the scanner unit made from at least two optically associated with conoscope channels and a system of mirrors, ensuring the passage of the light flux from conoscope through the channels to the outer or inner surface products.
2. The device according to claim 1, characterized in that the scanner unit is optically connected with conoscope so that the optical axis of one of the channels coincides with the optical axis of conoscope.
3. The device according to claim 1 or 2, characterized in that the scanner unit is made so that its axis of rotation coincides with the optical axis of one of the channels.
4. The device according to claim 1, characterized in that the scanner unit is made in the form connected with a coordinate table via the node rotation of the plug that is installed with the possibility of setting controlled inner and outer surfaces of the product, the teeth of which are made open to the Nala ensuring the passage of the light flux from conoscope to the outer and inner surfaces of the product, a system of mirrors placed in these channels with the possibility of overlapping channels.
5. The device according to claim 4, characterized in that the fork channels optically connected with conoscope so that the axis of the channel of one of its teeth coincides with the optical axis of conoscope.
6. The device according to claim 4 or 5, characterized in that the axis of rotation of the plug coincides with the optical axis of conoscope.
7. The device according to claim 1, wherein the mirror is arranged to change its position.
8. The device according to claim 1, characterized in that it is provided with blocks alignment and calibration.
9. The device according to claim 1, characterized in that the coordinate table is equipped with a control system that includes modules for linear and circular motion, to provide reciprocating and circular motion of the scanner unit.
FIELD: measuring engineering.
SUBSTANCE: method comprises receiving mirror and diffuse components of light radiation reflected from the surface, extracting pulses of the same duration from the components received, generating reference pulses by converting each pulse extracted from the mirror and diffusion components into photocurrents, and determining the quality of the surface from the photocurrents. Before being incident on the surface, the monochromatic beam is split into the mirror and diffusion pulses of the same duration. The reference pulses are generated by separating a part of the light flux from the extracted light pulses. The device comprises source of monochromatic light radiation, light-splitting plate, mirror made of a paraboloid of revolution, focusing system, first photodetector, unit for control and processing information, first obturator with a port and mirror zone on the surface of the rotatable disk, second obturator with a pair of same ports on the rotatable disk, and second photodetector.
EFFECT: enhanced accuracy and quality of determining.
5 cl, 4 dwg
SUBSTANCE: device has, serially placed at one optical axis, light source, collimator, ring optical mark forming means and multi-element photo-detector, connected to photo-detector signal processing block, as well as assembly for displacing part along axis. At optical axis before photo-detector ring mark projector is mounted with optical localizer of its position.
EFFECT: broader functional capabilities, higher speed and precision.
5 cl, 5 dwg
FIELD: measurement of surface profiles.
SUBSTANCE: the method consists in obtaining of a set of interferograms of the surface under examination at scanning of it by a low-coherent radiation source and recreation of the original profile of the surface under examination with the aid of them. At obtaining of each main interferogram an additional interferogram is read off at a shift of the bearing surface by a fractional part of the wavelength, after that the signal of the additional interferogram is subtracted from the signal of the main interferogram and a differential interferogram is obtained, and the original profile of the surface under examination is recreated from the obtained differential interferograms.
EFFECT: enhanced quality of interferograms due to localization of the zone of interference on the surface under examination.
4 cl, 6 dwg
FIELD: laser control technologies.
SUBSTANCE: method includes sweep of light beam to straight line with providing for projection of this beam on surface of rolled strip, video capture of projection area of current beam on portion of controlled surface and point of nearby edge of rolled strip, projection area is separated on given number of ranges and for each range received image is separated on components, forming respectively line of edge points of beam light projection, being portion of measurement area, line of brightest points inside light beam projection range and line of edge points of beam projection, quitting measurement area, to determine their coordinates along rolling strip surface, coordinates of lines of brightest points and edge points within light beam projection are straightened, and value of total coordinate is determined, from which with consideration of coordinates of points of lines of brightest points within light beam projection, by geometric interpretation, total parameter of rolled strip shape SARK(i,j) is determined.
EFFECT: higher trustworthiness and efficiency.
SUBSTANCE: device has coherent emission source, first condensing filter, consisting of condensing lens, first and second light-splitting elements, objective, interferometer, consisting of standard and controlled surface, device for measuring optical beam drive length, first projection system, registering block and system for processing interference image, system for projecting auto-collimation images. Also provided is additional condensing filter, mounted in focal plane of objective, device for changing optical length of beam drive is positioned behind the laser, made in form of two transparent diffraction grids, one of which can move in direction, perpendicular to grid rows, first diffraction grid divides emission on two beams, each of which gets on to lenses of condensing filters, while controlled and standard surfaces are deflected relatively to normal line to optical axis.
EFFECT: broader functional capabilities, higher efficiency.
FIELD: measuring engineering.
SUBSTANCE: device comprises housing that receives electric lamp, toroidal lens, conical mirror of ring vision, lens, and scaling grid arranged in series. The device is additionally provided with aperture with ring and central round recesses positioned in front of the lamp, ring and round color filters mounted in front of the recesses, and second mirror cone positioned behind the aperture. The top of the cone points to the lamp. The semi-transparent mirror, color filter, measuring grid, and first TV camera are arranged along the longitudinal axis of the housing behind the lens. The second color filter, second measuring grid, and second TV camera are arranged in series along the perpendicular to the axis of the housing behind the lens.
EFFECT: expanded functional capabilities.
FIELD: measuring engineering.
SUBSTANCE: method comprises setting the article to be controlled on the movable traverse gear having two extent of freedom, illuminating the surface of the article by light, receiving the light reflected from the surface of the article with the use of a photodetector, moving the article parallel to the X-axis, determining coordinates of the light spots on the photodetectors of the current values of the heights of the article shape, locking the position of the table, scanning the main section of the article shape, comparing it with the reference one , and determining the quality of the article shape. The main section is scanned by moving the article parallel to the Y-axis, when the traverse gear is in a position determined from the formula proposed. The device comprises unmovable horizontal base, vertical cantilever secured to the base, unit for measuring the article shape mounted on the vertical cantilever, two carriages that define a traverse gear and provided with the individual drives controlled by a computer, and pickup of linear movements. The first carriage moves parallel to the X-axis, and the second carriage is mounted on the first one and moves parallel Y-axis.
EFFECT: improved quality of control.
4 cl, 4 dwg
FIELD: measuring engineering.
SUBSTANCE: method comprises directing a coherent light beam at the surface to be tested, producing and recording interferogram of the light path difference, and processing the interferogram. The tested and reference surfaces are exposed to the second coherent light beam, and the second interferogram of the light path difference is created. The second interferogram is provided with the additional light path difference with respect to that of the first interferogram, which is equal to the one fourth of the beam wavelength. The light path difference of the first interferogram is determined at specific points of the surface to be tested from the signal of illumination in one of two interferograms. The device comprises source of coherent light, first filter-condenser, first and second light-splitting units, interferometer composed of tested and reference surfaces, unit for measuring optical length of the beam, first projecting unit, recording unit, observing unit, and unit for processing the interferogram. The device also has two light-splitting units between which two pairs of transparent diffraction lattices are interposed. The filter-condenser, the second light-splitting unit, and λ/4 lattice are arranged in series in the direction of the beam.
EFFECT: enhanced precision.
4 cl, 8 dwg
FIELD: measurement technology.
SUBSTANCE: device for automatic measuring coordinates of string plummets of hydraulic structures has reflecting screen, illumination source, two optical systems each of which is blocked with corresponding electro-optical array, device for measuring coordinate of string's projection, digital serial communication desk. Device also has resolver that has in turn two input serial communication desks, which have their outputs connected with controller, and indicator.
EFFECT: high precision of measurement of coordinates of string plummets.
2 cl, 1 dwg
FIELD: measuring equipment.
SUBSTANCE: method includes lighting object by collimated parallel beam of coherent monochromatic light, directed at angle of raising of screw surface relatively to object axis, as which object with screw surface is used, receiving optical image of its profile and following processing of received profile of image to perform further calculations of its parameters, while lighting of object is performed concurrently on two portions by collimated parallel beams of coherent monochromatic light, directed at raising angle of screw surface relatively to object axis, while these two beams are positioned symmetrically relatively to longitudinal axis of object and two images of said profile are received, mutual position of separate elements in which does not depend on presence of vibrations and shaking.
EFFECT: higher quality.
1 dwg, 1 ex
FIELD: the invention refers to measuring technique.
SUBSTANCE: the mode of measuring the form of an object includes formation of a light line on the surface of the object with the aid of the light-emitting system lying in the preset cross-section of the object, getting the image of the light line, its processing and definition of the coordinates of the profile of the cross-section of the object. AT that collateral light lines are formed on the surface by turns with the aid of two light-emitting systems illuminating the surface in preset cross-section of the object at different angles in its every point, images of light lines are received. On each of them sites are revealed. A resultant image is compiled out of the images of the indicated sites. According to this resultant image the coordinates of the profile of the cross-section of the object are determined. The arrangement for measuring the form of the object has a light-emitting system optically connected with a photoreceiver and a computing unit. It also has one additional light-emitting system optically connected with a photoreceiver and a commuting unit connected with its input to the computing unit, and with its output - with every light-emitting system. Optical axles of light-emitting system are placed in one plane and located to each other at an angle equal 5-800.
EFFECT: the invention increases accuracy of measuring by way of excluding the distortions of the zone of influence on the results of measuring.
13 cl, 5 dwg
FIELD: measuring instruments.
SUBSTANCE: the interferometer for controlling of the form of prominent, concave spherical and flat surfaces of large-sized optical components has a source of monochromatic radiation, a collimator and an objective, one after another located a beam divider, a flat mirror and an aplanatic meniscus with a reference surface and also an observation branch located behind the beam divider in beam return and a working branch consisting out of a spherical mirror with a compensator which form a focusing system. Depending of the form of a controlled surface focusing of the working branch of the interferometer is executed at replacing the compensator and the basic block of the interferometer which has an illuminating branch. A beam divider, a flat mirror, an aplanatic meniscus and an observation branch relative to a fully stabilized spherical mirror along an optical axis on such a distance at which the beams reflected from the spherical mirror fall on the controlled surface transversely to its surface.
EFFECT: expansion of nomenclature of controlled surfaces, decreasing large-sized dimensions of the interferometer.
2 cl, 3 dwg
FIELD: measuring engineering.
SUBSTANCE: method comprises setting the article to be tested on the working table, moving the nonflatness meter, determining the amplitude of nonflatness, and determining coefficients of nonflatness. The device comprises source of light, multielement photodetector, objective, and computer.
EFFECT: enhanced reliability.
5 cl, 7 dwg
FIELD: measuring arrangements.
SUBSTANCE: device comprises unmovable base provided with the first cantilever, two carriages provided with drives controllable with a computer, pickup of linear movements, arrangement for mounting blade and first measuring channel connected with the computer. The first carriage is mounted on the unmovable base and is made for permitting movement parallel to the X-axis. The first measuring passage is defined by the optoelectronic head and units secured to the unmovable base, third carriage provided with an actuator controlled by a computer and pickup of linear displacements, second measuring channel, first and scone markers of the blade with actuating members controlled by a computer, arrangement setting the blade mounted on the first carriage and made for permitting rigid orientation of the blade in the vertical plane, second and third carriages arranged on the first and second cantilevers, respectively, and made for permitting movement parallel to the Z-axis, first and second markers of the blade, fiber optic heads of the first and second measuring channels arranged on the second and third carriages from the both sides of the study blade. The objectives of the fiber optic heads are mounted for permitting triangulation link of the photodetector with the sourced through the blade surface of the blade to be tested.
EFFECT: enhanced efficiency.
6 cl, 7 dwg
FIELD: railway transport; instrument technology.
SUBSTANCE: proposed wear checking system contains optical receiving projection system and converting-and-calculating unit. It includes also car position pickup and car counter whose outputs are connected to inputs to inputs of converting-ands-calculated unit. Optical receiving projection system consists of sets of stereo modules. Rigid structure of each module includes two CCD television cameras and lighting unit. Outputs of stereomodules are connected to corresponding inputs of converting-and-calculating unit. Stereomodules are rigidly installed relative to each other.
EFFECT: enlarged operating capabilities.
3 cl, 2 dwg