Device to control the straightness of the surface

 

(57) Abstract:

Device to control the straightness of the surface can be used for contactless measurement of the deviation of a surface of a long narrow objects from a straight line at a specified interval in the stream. Device to control the straightness of the surface contains at least three sources of optical radiation, installed at a distance of 1.5 m from each other, each of which is optically connected to one of the receivers, stand for the measured rail, made in the form of the foot mechanism of the translational movement of the measured rail, the upper and lower knives for limiting the light flux passing from the optical sources to the respective receivers and to generate the reference photometric signal during calibration of each sensor. When the measured rail in the control zone in the operational block the signals of the receivers are processed and calculated ordinates of the surface of the rail, which is used as initial information for calculation of deviations from straightness of the surface, which produces an operating unit. The invention allows to solve the problem of control pemoline the nom table. 1 Il.

The invention relates to measuring equipment, namely, optical-electronic devices for contactless measurement of the deviation of a surface of a long narrow objects from a straight line at a specified interval and can be used to control the straightness of the surface of the rail.

A device to control the straightness of the guide rails.with. N 1482844, 61 K 9/08, E 01 35/10, USSR). The device comprises a transceiver, the optical emission is optically associated with a remote-controlled platform, a mirror, a collimator, a movable platform, the tool offset path and the Registrar.

It is also known a device for controlling the straightness of the rails. C. N 1576616, E 01 35/40, G 01 11/30, USSR). The device has an emitter on a mobile platform, the analyzer linearity, receiver, remote control, recorder and a computer device.

The closest known is a device for controlling the straightness of the surface (application N 3-49362, G 01 B 11/24, Japan). The device includes a source of optical radiation, forming several parallel light beams sequentially installed along the radiation stand with a smooth military parallel to the measuring object, and the receiver, recording the elapsed radiation, the output of which is connected to the input of the operational block. However, this device does not allow to solve the problem of control of the straightness of a large number of extended objects in the process of translational movement, for example, on the transport conveyor.

The proposed device, as is known, contains a source of optical radiation, successively installed along the radiation stand for the measured object, perpendicular to the radiation, the model element located parallel to the measuring object, and a receiver that registers radiation, the output of which is connected to the input of the operational block.

In contrast to the known, in the proposed device control straightness of the surface the stand is made in the form of the foot mechanism of translational (linear) of displacement of the measured object, the optical radiation source is made in the form of multiple, grouped into three groups of transmitters, each of which generates a light beam, parallel beams of other sources, and the receiver is made in the form of multiple units installed so that they can check each of them is that measuring the straightness of a surface is defined in the area of the second group of transmitters from the relation

< / BR>
where Y1, Y2, Y3- averaged coordinates of the object according to the measurement results in zone I, II, III groups transmitters

= L1/L2geometrical factor;

L1- the distance from the first group of transmitters to group II;

L2distance from group II transmitters to group III

The distance L between the first and third group of transmitters specifies the segment on which you want to find napravlennosti.

In the process of transporting of the object appear accidental displacement of the object that can be caused by a number of factors, for example, a feature of the transport device (eccentricity or worn rollers of the roller conveyor, the sound vibrations of the object, and so on). Naturally, they distort the test results. Using the algorithm of interaction between sensors, described by equation (1), allows to eliminate the effect of these factors.

The minimum required number of transmitters and receivers is equal to 3. To eliminate the effect of high frequency vibrations and purity of the measured surface on the measurement results can be produced by averaging counts Y1, Y2, Y3. Such is accomplished by appropriate selection of the optical is Yedinaya in the group.

Thus, the result of the combined application of the distinctive features of the proposed solution allows to ensure the stability of the measurement result to accidental displacement, high frequency vibrations and clean surface.

The drawing shows a functional diagram of the device for controlling the straightness of the surface of the rail when it passes on the roller table in the supine position on the sole.

The device consists of the following parts: measured rail 1, which is located with the possibility of translational motion on the conveyor 2, the rolls which perform the role of the support stand, the three optical sources - I, II, III, and I and III sources installed at a distance of L1+ L2= L = 1.5 m from each other. Each optical source and is electrically connected to one receiver, which contain analog-to-digital Converter (ADC) for digitizing the photometric signal of the photodiode receiver and a local controller for collecting and pre-processing the information received from the ADC, and the management Board of the radiator and the upper 3 and lower 4 knives intended for limiting the light flux passing from the source of alausi a line with a straight edge, operating unit, which collects information from all receivers and displays the measurement result.

The device operates as follows. Before measuring each new rail command operating unit 5 automatically calibrating each receiver. The calibration procedure is as follows. Luminous flux from each source I, II, III in the absence of the rail 1 is limited to the upper 3 and lower 4 knives. The distance between the selected Y0= 25 mm Luminous flux from sources I, II, III, corresponding calibrating the gap, getting into the receivers I, II, III, converted by the photodiodes of the receiver in the photocurrent, and then use the built-in ADC into a digital code.

Through collaboration ADC and the local controller built into each receiver, optimized mode amplification of the photocurrent in each receiver under maximum capacity ADC and generates a digital signal of N0(i) where i = 1, 2, 3 the number of the receiver of the light beam.

Collected and pre-processed information is transmitted to the operation unit 5, where the calculated scale factor Y0/N0(i). The presence of the calibration guarantees the receiver light is sirua to the required level the influence of external factors, for example, dust, the operation of each receiver.

When the monitored rail 1 in the measuring zone luminous flux, limited to one side of the upper knife 3, and on the other, the moving rail 1, digitized each group of receivers I, II, III and transmitted to the operation unit 5. On the obtained samples N(i) is calculated ordinates of the surface of the rail Y(i) = N(i) Y0/N0(i) that are used as a source of information for calculating deviations from straightness of the surface that produces the operation unit 5.

Device to control the straightness of the surface containing the source of optical radiation, successively installed along the radiation stand for the measured object, perpendicular to the radiation, a model element, a receiver for reception of optical radiation, the output of which is connected to the input of the operational block, characterized in that the stand for the measured object is made in the form of supports mechanisms of translational movement of the measured object, the source of optical radiation is in the form of several grouped into three groups of transmitters, each of which forms one light Phnom with the possibility of registering each one of the light beam, exemplary element made in the form of upper and lower knives arranged with the formation of the slit, and an operating unit configured to calculate deviations from straightness of the surface area of the second group according to the formula

< / BR>
where Y1, Y2, Y3- averaged coordinates of the object according to the measurement results in the area of the first, second and third groups of transmitters;

L1- the distance from the first group of transmitters to the second group of transmitters;

L2- the distance from the second group of transmitters to the third group of transmitters.

 

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