SU649172A1 - Device for measuring parameters of motion of contrast image - Google Patents

Description

For this purpose, in a device for measuring motion parameters of a contrast image containing a lens optically coupled to a thermal imaging tube, for example, a type of dissector, the deflecting plates of which are connected respectively to horizontal and frame scan generators, which are connected to the corresponding outputs of the chroniser, the signal output of the transmitting The television tube is connected via a video amplifier to the input of a digital correlator, the first and second control inputs of which are connected to the personnel one, and the line connectors. th outputs hro-. nizator, the clock output of which is connected via the first pin to the third control input of the digital correlator, and the control input of the first key is connected to the horizontal output of the clock, the frame and lowercase outputs of which are connected to the inputs of the line number register, the outputs connected via the first code rewriting block with the output register of the speed channel code, while the outputs of the digital correlator are connected via the second block of rewriting codes with the output register of the drift angle code, the OR element, triggers, kgauchi, the inputs of the second block and code rewriting is connected via the OR element to the first input of the first trigger and via the second key to the control inputs of the output registers of the speed and drift channel, the first input of the entered code comparison block and through the input of the first delay block to the control inputs of both code rewriting blocks, at the same time, the control input of the second switch is connected to the second trigger circuit, the output of the first trigger is connected to the control input of the third key, the input is connected to the input pulse generator, and the output is connected to the second input and the fourth control input of the digital correlator; in addition, the second inputs of the two triggers are connected via the input inverter and the differentiating unit to the horizontal output of the clock, the frame output of which is connected to the third input of the code comparison unit, the fourth input of which is connected to the input a second delay unit with a differentiating unit and with a fifth control input of the digital correlator; the output of the code comparison unit is connected to the first input of BTOpoix) trigger

The drawing shows a structural electrical circuit of the proposed device.

An apparatus for measuring motion parameters of a contrast image comprising a lens 1 optically coupled to a transmitting television tube 2, for example, a dissector type, the deflecting plates of which are connected respectively to generators 3, 4 of horizontal and vertical sweeps, which are connected to the corresponding outputs of the chroniser 5, signal the output of the television tube 2 is connected via video amplifier b to the input of the digital correlator 7, the first and second control inputs of which are connected to personnel and line outputs; the jam 5, the clock output of which is connected via the first key 8 to the third control input of the digital correlator 7, and the control input of the first key 8 is connected to the horizontal output of the clock 5, whose frame and row outputs are connected to the inputs of the register 9 of the line number connected by the outputs via the first block 1O of rewriting codes with the output register 11 of the speed channel code, while the outputs of the digital correlator 7 are connected via the second block 12 of rewriting the codes with the output register 13 of the drift angle code, element OR 14, triggers 15, 16, cells 17, 18. The inputs of block 12 are connected via the OR 14 element to the first input of the first trigger 15 and through the second key 17 to the control inputs of the output registers .11 and 13, the first input of the comparison block 19 codes and through the first delay block 20 to the inputs The control units 10 and 12 at that control input of the second key 17 are connected to the output of the second trigger 16, the output of the first trigger 15 is connected to the control input of the third key 18, the input connected to the pulse generator 21 and the output to the second input of the comparison unit 19 and fourth control input digits second correlator 7. In addition, to the second inputs of the trigger 15, .16 is connected through the inverter 22 and the differentiating unit 23 the horizontal output of the chroniser 5, personnel (the output of which is connected to the third input of the comparison unit 19, the fourth input of which is connected through the second delay block 24 with differentiating unit. 23 And with the fifth control input of the digital correlator 7, the output of the comparison unit 19 is connected to the first input of the second trigger 16. The device operates in a slow way. The moving image is transmitted by a transmission television tube 2 in two parallel lines located at a fixed distance in the plane of the photocathode. At the beginning of the measurement cycle (frame period), the frame and line frequency signals I J. and Ip, which are generated by the clock, excite the generators 4 and 3, respectively, of the horizontal and line scan, thereby forming the first line that reads the image across the line. The video signal of the first line through the video amplifier 6 enters the recording in the digital correlator 7, advancing in the registers of the digital correlator 7 (not shown in the drawing) with the help of clock pulses of frequency i entering the digital correlator 7 from chroniz igor 5 through the key 8. Signal 11 7, arriving at the third input of Comparison Unit 19, the latter is cleared of old information. On the write cycle during the reverse run of the first line, the overflow code is written to the comparison unit 19. At the same time, the horizontal frequency signal i, from the differentiating control unit 23, switches on the keys 18, 17, respectively, through the trigger 15, 16. Through the key 18, the pulses from the generator 21 are fed to the inputs of the comparison unit 19, the digital correlator 7. The overflow signal from the outputs of the digital correlator 7 enters the element. OR 14, the output, the signal of which leads to the initial state of the trigger 15 and, therefore, fixes the overflow code, the value of which is stored in the comparison unit 19. In the subsequent strokes of the lower case; The current 4 measurement cycle doesn’t excite generator 4, thus providing a new fixed position to match the line on the photo cathode with the aid of the television tube 2 (second line). .. The overflow signals of the digital correlator 7 are sent to the OR 14 element, through it the initial state 15 is triggered, thereby turning off the key 18 and, therefore, fixing the overflow code, the value of which is compared in comparison unit 19 with the previously stored one. This overflow code is also stored in the comparison block 19. At the moment of overflow code in the comparison block 19, a pulse is generated at its output, which returns the trigger | 16 to the initial state, which ensures the outflow of the key 17. The overflow signal from the output of the OR 14 element does not go through the key 17, and the codes are not overwritten in the high registers 11, 13. Such logic of operation is ensured by the fact that the extreme value of the FVC signal for the last part of the measurement period is no more than the previous one. The overflow signal through the key 17 passes only if the overflow code of the subsequent line is less than the undoubted value. This signal overwrites new codes with registers 11, 13 using delay block 20 and block 1O, 12. Thus, the presence of key 17 output signal indicates an extreme value of the CCF for the last part of the measurement cycle, the moment of which is determined by the line number. This fact is recorded in the form of new values of kbj demolition and speed of drift from | In the output registers 11, is. The row number register 9 counts the number of rows (inversely proportional to the speed) on the measurement cycle (frame period), is reset to the active state by the signal I C, received from the output of the zagorazagor 5. The final stage of the horizontal calculation period is to reset the signal f Q, coming from the output of delay unit 24, digital correlator 7 and comparison unit 19. Initialization of comparison unit 19 for the next measurement cycle is performed by signal i. coming in at his third entrance. The main extremum on the measurement period is located and is indicated automatically, automatically according to the logic described above. When perpendicular to the direction of the lines, the image is moving

The extremum of PVCs is located strictly at the end of the line period.

Thus, the extreme value of the PVC, taken from the corresponding output of the digital correlator 7, indicates the discrete value of the signal of the drift angle of the direction of the vector 11.

The pulse frequency of the generator 21, the flyback time of the horizontal sweep, and the maximum code overflow value must be fully sized to provide the described operation logic.

The proposed device is a specialized digital information-measuring system. The accuracy of signal processing in it is determined only by the size of the digital nodes and their speed, i.e. it is limited by the applied element base.

Claims (1)

Invention Formula A device for measuring motion parameters of a contrast image containing a lens optically coupled to a transmitting television tube, for example, a dissector type, the deflecting plates of which are connected respectively to the horizontal and scraw generators, are connected to the corresponding outputs of the chroniser, the signal output of the television tube transmittance is connected through a video amplifier with a digital correlator input, the first and second controls & l whose book inputs are connected to frame and line outputs chro a clock, whose clock output is connected to the third control input of the digital correlator through the first key, and the control input of the first key is connected to the horizontal output of the clock, the frame and line outputs of which connected to the inputs of the register of the line number, the outputs connected via the first code rewrite with the output register of the speed channel code, while the outputs of the digital correlator are connected via the second code rewriting unit with the output register of the drift angle code, the OR element, triggers, keys, different from those that, in order to increase the accuracy, the inputs of the second block of code rewriting are connected via the OR element to the first input of the first trigger and through the second key to the control inputs of the output registers of the velocity channels and the drift angle, first The input of the entered code comparison block and, through the input of the first delay block, with the control inputs of both blocks of code rewriting, the control input of the second key connected to the output of the second trigger, the output of the first trigger connected to the control input of the third key connected to the input of the generator pulses, and the output with the second input of the code comparison unit and with the fourth control through the digital input of the digital correlator; in addition, it is connected to the second inputs of both triggers via the input inverter and differentiating The second block is a horizontal output of the chronizer, whose output is connected to the third input of the code comparison unit, the fourth input of which is connected via the input Second delay unit to the differentiating unit and to the fifth control input of the digital correlator, the output of the code comparison unit is connected to the first input of the second trigger Sources of information taken into account in the examination: 1, USSR Author's Certificate N9484533, class, H 04 N7 / 18, 1974.