SU1317279A1 - Photoelectric device for measuring object dimensions - Google Patents

Abstract

This invention relates to instrumentation technology. The purpose of the invention is to increase the speed and reliability of measurements by automating registration. A device for measuring the size of an object contains a sweep element in the form of a hollow cylinder 1 with a sweep needle 2.

Description

track with dTBepcTHHMH 2, forming one turn of the helix, and a synchronization track with holes 3 made along its side perimeter, a beam splitting element, two photodetectors 11 and 20, two optical channels forming the first and second images on the side surface of the sweep element and delivering scanning light pulses to photo receivers 11 and 20, and information processing unit 25, containing 1 channels 26 and 27 measuring transverse dimensions and object length, as well as synchronization and automatic detection circuits within azhdogo minimum frame size of its cross-scan position of the object. The device has

The invention relates to instrumentation technology and can be used for contactless automatic measurement of deformations, displacements, geometric dimensions of samples, structural elements and other objects, including those tested in sealed chambers, at high and low temperatures, in vacuum and at pressures. , in the conditions of aggressive environments where it is impossible or difficult to use contact methods.

The aim of the invention is to increase the speed and accuracy of measurements by automating the recording.

Figure 1 shows an optical circuit of a photovoltaic device for measuring the size of an object; 2 is a functional electrical circuit of the device.

A photoelectric device for measuring the size of an object contains a sweep element in the form of a hollow cylinder 1 with a turning track with holes 2 forming a single turn of the helix and a synchronizing track made along the side perimeter of the hollow cylinder 1 and consisting of holes 3, the number of which is the number of holes 2 in the drill

there is also an additional connection between the length measurement channel 27 and the transverse dimensions measurement channel 26, the new communication inside the transverse dimensions measurement channel 26, and the placement of the apertures 2 and 3 of sweep and sync tracks in pairs to form a hollow cylinder 1, which allows simultaneous measurement of the minimum transverse size of an object and its length, measurement of the length of an object during a frame with a frequency determined by the number of holes 3 on the sync track, eliminate the need to move the lens to achieve a simultaneous measurement of the minimum transverse size and length of the object, 2 Il.

the aperture, the holes 2 and 3 are arranged in pairs on the generators of the hollow cylinder 1, the beam-splitting element 4, the first optical channel, installed so that its optical axis intersects the hollow cylinder 1 at the level of the centers of the holes 3 of the synchronization track cylinder 1, the Piehan prism 5, the lens 6, and the diaphragm 7, located inside the hollow cylinder 1 optical unit 8, consisting of a collective lens 9 and a mirror 10, and the photodetector 11, the second optical channel, including mounted in front of the hollow cylinder 1, the first guide mirror 12, optically coupled to the beam-splitting element 4, the second lens 13, the second and third guide mirrors 14 and 15, and the second diaphragm 16, the second optical unit 17 placed inside the hollow cylinder 1 and The first is from the collateral lens 18 and the mirror 19, and the second photodetector 20, two LEDs 21 and 22, and the third and fourth photodetectors 23 and 24, which are located respectively on the outer and inner side of the hollow cylinder 1 opposite the synchronizing track and the first reamer holes up to fO

horns, and an information processing unit 25 comprising a transverse dimension measurement channel 26, a length measurement channel 27, a filling pulse generator 28 and a scan line number counter 29, the first input of which is connected to the output of the third photodetector 23, the second input to the output of the fourth photodetector 24, and the output is the first output of the device. The channel 26 for measuring the transverse dimensions of the object consists of the first shaper 30 rectangular pulses, the input of which is connected to the output of the second photodetector 20, the first counter of 31 pulses, the first input of which is connected to the output of the first formaker 30 rectangular pulses, the second input - the output of the third photodetector is 2-3; the third input is with the filling pulse generator 28, and the output is the second output of the device, the buffer register 32, the first input of which is connected to the output of the first pulse counter 31, the second input - with the output of the counter 29 of the scan line number, and the third input - with the output of the fourth photodetector 24, the comparison circuit of the codes 33, the first input of which is connected to the output of the first pulse counter 31, the second input to the first output of the buffer register 32, the matching circuit 34, the first the entrance of which is connected to

the output of the code comparison circuit 33, the second input with the output of the third photodetector 23, and the output with the fourth input of the buffer register 32, and the output register 35, the first input of which is connected to the first output of the buffer register 32, the second input with the second output of the buffer register 32 , third entry - exit quarter 25

thirty

35

40

the first photodetector 24, the fourth input of the thy 3 of the synchronization track. With

with the third output of the buffer register 32, the first output is the third output of the device, the second output is the fourth output of the device, and the third output is the sixth output of the device. The channel 27 for measuring the length of an object consists of a second rectangular pulse generator 36, the input of which is connected to the output of the first photodetector 11, and a second pulse counter 37, the first input of which is connected to the output of the second rectangular pulse generator 36, the second input - with the output of the third photodetector 50

55

the necessity of selecting the focal length of the first lens 6 changes the size of the first image of the object 38 with respect to its second image so that the length of the first image is one order with the transverse size of the second image of the object 39. The hollow cylinder 1 is rotated with constant this soon. As the hollow cylinder 1 rotates, the second image of the object 38 is scanned line by line with holes 2 of the sweep track. As a result, light pulses form.

O

five

0

five

0

peak 23, the third input — with the output of the filling pulse generator 28, and the output connected to the fifth input of the buffer register 32 is the output of the device. Measured object 38 is installed in a test chamber 39 provided with two windows.

40 and 41 and placed between illuminator 42 and security window 43

devices. I

Photoelectric device for

measuring the size of an object works as follows.

The luminous flux from the illuminator 42 through the illuminator 40 is directed to the test object 38. The luminous flux from the object 38 through the illuminators

41 and 43 enters the beam-splitting element 4, where it is divided into two light streams. The first luminous flux through the Piechan prism 5 enters the lens 6, which through the diaphragm 7 forms on the side surface of the hollow cylinder 1 at the level of the holes 3 of the synchronization track the first image of the object 38. The second luminous flux is directed by the first guide mirror 12 to the second lens 13, which using the second and third guide mirrors 14 and 15, through the second diaphragm 16, forms a second image of the object 38 on the diametrically opposite portion of the lateral surface of the hollow cylinder 1.

The first image of the object 38 is rotated by the Pekhan prism 5 by 90 relative to its second image so that the axis of the first image of the object 38 (or a line parallel to the axis of the object 38 and connecting the basic marks placed on the object 38) coincides with the rotation of the hollow cylinder 1 with hole centers 3 sync tracks. With

the need to select the focal length of the first lens 6 changes the size of the first image of the object 38 with respect to its second image so that the length of the first image is one order with the transverse size of the second image of the object 39. The hollow cylinder 1 is rotated at a constant speed . As the hollow cylinder 1 rotates, the second image of the object 38 is scanned line by line with holes 2 of the sweep track. As a result, light pulses form.

51

Wells, which are directed by the second optical unit 7 to the second photodetector 20, where they are converted into electrical pulses, which are fed to the input of the first shaper 30 rectangular pulses. At each revolution of the hollow cylinder 1, the holes 3 of the synchronization track successively intersect the first image of the object 38, scanning it in length with a frequency determined by the number of holes 3 of the synchronizing track. As a result, light sweep pulses are generated, which by means of the optical unit 8 directs the photodetector 11, where the light pulses are converted into electrical pulses, which are fed to the input of the second square wave former 36. When the hollow cylinder 1 rotates, the holes 3 of the synchronization track intersect the luminous flux emitted by the first LED 21, and the synchronizing light pulses arrive at the third photodetector 23. From the outputs of the third photodetector 23, the corresponding electrical pulses are supplied to the first input of the scanner line number 29, to the second input of the first pulse counter 31, to the second input of the first coincidence circuit 34 and to the second input of the second pulse counter 37.

At each revolution of the hollow cylinder 1, the first of the holes 2 of the sweep track once crosses the luminous flux emitted by the second LED 22, and a light pulse arrives at the fourth photodetector 24. From the output of the fourth photodetector 24, a frame electric pulse is fed to the second input of the counter 29 of the scan line number, to the third input of the buffer register 32 and to the third input of the output register 35. From the output of the first shaper 30 square pulses, the electric pulses are removed corresponds to the values of the transverse dimensions of the object 38 for each scan line, and is fed to the first input of the first pulse counter 31, to the third input of which pulses from the generator 28 are fed pulse filling

With the arrival of the synchronizing pulse, the first counter of the 31 pulses comes to its initial state. With

796

When the first pulse counter 31 arrives at its first input of a rectangular pulse, it counts the number of filling pulses within a rectangular pulse duration and a digital code corresponding to the measured transverse size is output from its output to the second output of the device. Simultaneously, from the counter code 29 of the scan line number, the code of the number of the corresponding scan line, counted from the frame impulse, arrives at the first output of the device.

The rectangular electric pulses, whose duration corresponds to the length of the object 38, are taken off the square pulses and fed to the first input of the second counter 37 of pulses. Filling pulses from the generator 28 of pulses are applied to the third input of the second pulse counter 37. C, the arrival of the synchronizing pulse from the output of the third photodetector

23 to the second input of the second counter

37 pulses it comes to its original state. Upon arrival at its first input, a rectangular pulse from the output of the second driver 36

for rectangular pulses, it counts the number of filling pulses within a rectangular pulse duration. During the frame, the output of the second counter 37 of pulses to the fifth output of the device is issued. Successively digital codes corresponding to the length of the object 38 with a frequency determined by the number of holes 3 of the synchronizing track and the speed of rotation of the hollow cylinder 1.

Thus, from the first, second, and fifth outputs of the device, the codes of the scan line numbers corresponding to these lines, the codes of the transverse dimensions of the object

38 and object length codes 38. Since the openings 2 and 3 of the sweep and sync tracks are arranged in pairs on the lateral surface 1 forming the side surface, and the first and second images of the object 38 are approximately equal in size (due to the selection of the focal length of the first

object 6), the simultaneous measurement of the length of the object 38 is ensured when measuring its transverse size along each scan line, including simultaneous length measurement

and minimum lateral size. To automatically detect, within each frame of a sweep, the minimum transverse size of its coordinate (scan line number) and the length of the object 38, measured simultaneously with the measurement of its minimum transverse size, from the output of the first counter 31 pulses, the transverse dimensions of the object 38 are fed to the first input of the buffer register 32 and the first input of the code comparison circuit 33, the codes of the scan line numbers are supplied to the second input of the buffer register 32 from the output of the counter 29 of the scan line number, and the fifth input Register 32 is supplied with object length codes. These codes cannot be written to the buffer register 32 until a synchronizing pulse arrives at its fourth input from the output of the coincidence circuit 34. I

The comparison code diagram 33 serves to compare the codes of the transverse dimensions of the object 38 supplied to its first and second inputs. If the value of the code applied to its first input is less than the value of the code supplied to its second input, it outputs an enable signal that is fed to the first input of the coincidence circuit 34, which only with this signal transmits a clock pulse to the fourth input of the buffer register 32. If the code value supplied to the first: the input of the code comparison circuit 33 is greater than the code value applied to its second input, then the output signal is not output from the output of the code comparison circuit 33. A frame pulse arriving at the beginning of the sweep frame at the third input of the buffer register 32 ensures that the buffer register 32 is set to one. Here, from the first output of the buffer register 32, the maximum code is supplied to the second input of the code comparison circuit 33. Then, the first input of the buffer register 32 and the first input of the comparison circuit from the output of the first pulse counter 31 receive the transverse size code of the object 38 when scanning its second image with the first hole of the sweep track, to the second input of the buffer register 32 from the output of the row number counter 29 sweep - the code of the first scan line, and the fifth input

5 10 f5 20

thirty

25 172798

buffer register 32 is the length code -g of the object 38 when scanning its first image with the first opening of the synchronization track (the first opening of the synchronizing track and the first opening of the sweep track lie on one forming side surface of the hollow cylinder 1).

The code comparison circuit 33 compares the code of the transverse size of the object 38 when scanning its second image with the first opening of the development track with the maximum code. Since the transverse size code of the object 38 is obviously less than the maximum code, the code comparison circuit 33 outputs in the code a permitting signal that arrives at the first input of the coincidence circuit 34, which passes the timing pulse of the first scan line to the fourth input of the buffer register 32. The buffer register 32 opens and the transverse size code of the object 38 is recorded in it when scanning its second image with the first opening of the development track, the code of the first scanning line and the sample length code when scanning it first image synchronizing the first opening track.

These codes are fed to the first, second and fourth inputs of output register 35, respectively. But writing to output register 35 of codes from buffer-register 32 is possible only when the next personnel pulse is fed to its third input. At the same time, the code of the transverse size of the object 38 when scanning its second image with the first opening of the spreading track from the first outputs of the buffer register 32 is fed to the second input of the code comparison circuit 33. Next, the first input of the buffer register 32 and the first input of the code comparison circuit 33 arrive at the code of the transverse size of the object 38 when scanning its second image with the second opening of the scan track, to the second input of the buffer register 32 - the code of the second scanning line, and at the fifth input of the buffer register 32 is the sample length code when scanning its first image with the second hole of the sync track. The code comparison circuit 33 compares the size code of the object 38 when scanning its second image with the second opening of the scanner.

0

91

a track with a code previously applied to its second input, the transverse size of the object 38 when scanning its second image with the first opening of the spreading track. If the code received at the first input of the code comparison circuit 33 is larger than the code at its second input, then the enabling pulse is not generated in the code comparison circuit 33, the matching circuit 34 does not pass a sync pulse across the fourth input of the buffer register 32, and the codes , previously recorded in buffer register 32, do not change,

If the code received at the first input of the code comparison circuit 33 is less than the code at its second input, then in the code comparison circuit 33, an enabling pulse is generated, which is fed to the first input of the matching circuit 34, which transmits a clock pulse to the fourth input of the buffer register 32. Register 32 instead of the previously recorded codes writes down the code of the transverse size of the object 38 when scanning its second image with the second opening of the scan track, the code of the second scanning line and the code of the sample length when scanning e a first image synchronizing the second opening track. These codes are fed to the first, second and fourth inputs of the output register 35, respectively. At the same time, the cross-section code of the object 39 when scanning its second image with the second opening of the unwinding track is fed to the second input of the code comparison circuit 33. Further, the transverse codes are fed to the inputs of the buffer register 32. object size 38, the corresponding scan line number codes and object length code 38. The next code of the transverse size of the object 38 in the code comparison circuit 33 is compared with the cross size code object 38 previously recorded in the buffer register 32 and, if the transverse dimension of the next code okazhets less, then it is recorded into buffer register 32 instead of the previously recorded.

At the same time, the corresponding scan line number code and object length code 38 are written to the buffer register 32. As a result, by the end of the frame in the 32-bit buffer register

ten

15

20

25

17279

a, 30 35 40 f 50

ten

The recorded code is the minimum transverse size (neck) of the object 38, the code of the scan line number (i.e., the coordinates of the neck of the object 38) and the code of the length of the object 38 measured simultaneously with the measurement of its minimum transverse size. G the arrival of the next frame pulse to the third input of the output register 35 records the codes of the simultaneously measured minimum transverse size and length of the object 38, as well as the code of the scan line number corresponding to the minimum transverse size of the object 38, which are respectively the third, sixth and the fourth outputs of the device.

Therefore, the device output automatically receives data on the enumeration of the object size 38 with an indication of their coordinates along the length of the object 38 (scan line number) and the length of the object 38 measured during each measurement of its transverse size, and

55

at the end of each sweep frame - data on the minimum transverse size (neck) of the object 38 and its coordinate (scan line number), as well as on the length of the object 38, measured simultaneously with the measurement of its minimum transverse size. These data are provided to visual devices, digital printers or computers.

Thus, an increase in speed is achieved and the non-simultaneity of measurement of the minimum transverse size and length of the object is eliminated. According to the results of measurements obtained while simultaneously scanning the minimum transverse size of the second image of the object and the length of its first image, true material deformation diagrams are constructed.

The formula of the invention is a photoelectric device for measuring the size of an object containing a sweep element in the form of a hollow cylinder with a sweep track with holes forming a single turn of the helix and a synchronizing track made along the side perimeter of the hollow cylinder and consisting of holes whose number is the number of holes in the developmental track, the beam-splitting element, the first optical channel, which includes sequentially II

The Pekhan prism, in front of the hollow cylinder, the lens and the diaphragm, the optical unit and the photodetector located inside the hollow cylinder, the second optical channel, which includes the first guide mirror optically connected to the beam transducer successively mounted in front of the hollow cylinder, the second and third guiding mirrors and the second diaphragm, located inside the hollow cylinder, the second optical unit and the second photodetector, two LEDs, and the third and fourth photodetectors, which are located with Respectively from the outer and inner side of the hollow cylinder opposite the synchronizing track and the first opening of the development track, and the information processing unit containing the channel for measuring transverse dimensions, the channel

13

a length measurement, a filling pulse generator and a scan line number counter, the first input of which is a register, the third input of which is connected to the output of the fourth photodetector, the first output is the third output of the device, and the second output is the fourth output of the device; The length measurement channel consists of a second rectangular pulse generator, the input of which is connected to the output of the first photodetector, a second pulse counter, the first input of which is connected to the output of the second rectangular pulse generator, the second input - with the output of the third photodetector, the third input - with the output of the pulse generator filling, and the output is the fifth output of the device, characterized in that, in order to increase the speed and reliability of the measurements, the buffer register is made five input, its first connected to the output of the first pulse counter, the second input - to the output scan line number counter, and the third input - to yield

Dinen with the third photoreceiver of the fourth photodetector, the second input

ka, the second input is with the output of the fourth photodetector, and the output is the first output of the device; the measurement channel of transverse dimensions consists

The first input of the output register of so-called pulses from the first driver of the polar-30 is the input of which is connected to the output of the second photodetector, the first pulse counter, the first input of which is connected to the output of the first square-wave former of the third photodetector, the third entrance - with. the output of the pulse generator and the output is the second output of the device, the buffer register, the code comparison circuit 40, the first input of which is connected to the output of the first pulse counter, the coincidence circuit, the first input of which is connected to the output of the code comparison circuit, the second input 45 by the course of the third photodetector, and exit 5 O 5

1727912

The second register, the third input of which is connected to the output of the fourth photodetector, the first output is the third output of the device, and the second output is the fourth output of the device; The length measurement channel consists of a second rectangular pulse generator, the input of which is connected to the output of the first photodetector, a second pulse counter, the first input of which is connected to the output of the second rectangular pulse generator, the second input - with the output of the third photodetector, the third input - with the output of the pulse generator filling, and the output is the fifth output of the device, characterized in that, in order to increase the speed and reliability of the measurements, the buffer register is made five input, its first connected to the output of the first pulse counter, the second input - to the output scan line number counter, and the third input - to yield

20

 5th fourth photodetector, second entrance

The code comparison circuit is connected to the first output of the buffer register, the output of the matching circuit is connected to the fourth input of the buffer register.

dinene with the first output of the buffer register, the second input with its second output, the fifth input of the buffer register is connected to the output of the second pulse counter, the fourth input of the output register with the third output of the buffer register, the third output of the output register is the sixth output of the device, The openings of the scanning and synchronizing tracks are arranged in pairs on the lateral surface of the hollow cylinder, and the first optical channel is installed so that its optical axis intersects the hollow cylinder at the level of the centers of the Tille synchronizing Tracks

Editor K. Voloshchuk

Compiled by E.Glazkova

Tehred A. Kravchuk Proofreader G. Reshetnik

Order 2412/36 Circulation 677 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35., Raushsk nab. 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

SUMMARY OF THE INVENTION A photovoltaic device for measuring the size of an object, comprising a deploying element in the form of a hollow cylinder with a deploying track with holes forming one turn of a helical line, and a synchronizing track made along the lateral perimeter of the hollow cylinder At the same time in the buffer register 32, the corresponding scan line number code and the object length code 38 are recorded. As a result, by the end of the frame in the buffer register 32 is ok and consisting of holes, the number of which is equal to the number of holes in the scan path, a beam splitter element, the first optical channel, including 11 1317279 The Pehana prism, the lens and the diaphragm located inside the hollow cylinder, an optical unit and a photodetector, a second optical channel, including sequentially mounted front hollow cylinders core, the first directing mirror optically connected with the beam splitting element, the second lens, the second and third directing mirrors 10 and the second diaphragm, the second optical unit and the second photodetector, two LEDs and the third and fourth photodetectors located inside the hollow cylinder, respectively the outer and inner sides of the hollow cylinder opposite the synchronization track and the first opening of the deployment track, and an information processing unit comprising a transverse dimension measuring channel 20, such as al length measurement, the pulse generator and the counter filling scanning line number, the first input coupled to an output of the third photodetector 25-minute, second input - to the output of the fourth photodetector, and the output is the first output device; the transverse dimension measuring channel consists of a first rectangular pulse shaper, the input of which is connected to the output of the second photodetector, a first pulse counter, the first input of which is connected to the output of the first rectangular pulse shaper, 35 sov, the second input - with the output of the third photodetector, third input - from. the output of the fill pulse generator, and the output is the second output of the device, the buffer register, the code comparison circuit 40, the first input of which is connected to the output of the first pulse counter, the coincidence circuit, the first input of which is connected to the output of the code comparison circuit, the second input - with the third photodetector and the output register, the third input of which is connected to the output of the fourth photodetector, the first output is the third output of the device, and the second output is the fourth output of the device; the length measurement channel consists of a second rectangular pulse shaper, the input of which is connected to the output of the first photodetector, a second pulse counter, the first input of which is connected to the output of the second rectangular pulse shaper, the second input - with the output of the third photodetector, the third input - with the output of the fill pulse generator, and the output is the fifth output of the device, characterized in that, in order to increase the speed and reliability of measurements, the buffer register is made five-input, its first input with it is single with the output of the first pulse counter, the second input with the output of the scan line number counter, and the third input with the output of the fourth photodetector, the second input of the code comparison circuit is connected to the first output of the buffer register, the output of the matching circuit is connected to the fourth input of the buffer register, the first input the output register is connected to the first output of the buffer register, the second input is connected to its second output, the fifth input of the buffer register is connected to the output of the second pulse counter, the fourth input of the output register is connected to the third Odom buffer register, the third output register output is the sixth output of the apparatus, the openings deploying and synchronizing tracks are arranged in pairs on a side surface forming a hollow cylinder, and the first optical channel is set so that its optical axis intersects the hollow cylinder on hole level synchronization track. Figure 1 Compiled by E. Glazkova Editor K. Voloshchuk Tehred A. Kravchuk Proofreader G. Reshetnik Order 2412/36 Circulation 677 Subscription VNIIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and printing company, Uzhhorod, st. Project, 4