SU1533018A1 - Television device for detection of objects - Google Patents

Abstract

The invention relates to television and can be used in technical vision systems for automating visual control in the tasks of detecting objects against the background of interference. The purpose of the invention is to improve the noise immunity and reduce the time to detect objects. The device contains a lens 1, a matrix photoelectric device with charge coupling / MFPZS / 2, a converter of 3 levels, a synchronous generator 4, a video amplifier 5, a threshold device 6, dividers 7 and 8 frequencies. Keys 9 and 10 are entered to achieve the goal, and each of the dividers 7 and 8 contains a counter, a decoder and an RS flip-flop. The performance is improved because there is no need to perform computational operations to implement spatial filtering in the period between polling of the CIPP2 cells. The noise immunity of the device increases, the detection reliability, since spatial filtering / accumulation / takes place prior to threshold processing of the video signal. The trigger threshold of the device 6 should be set taking into account the chosen criterion of optimality of detection, permissible probabilities of errors 1 and 2 of the second kind, and also depending on the number of elements of the IFPR 2 combined into the accumulation zone and depending on the signal-to-noise ratio. 1 hp ff, 3 ill.

Description

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And Eobrg I is related to television and can be used in technical vision systems to automate visual control in the tasks of detecting objects against the background of interference.

The purpose of the invention is to improve the noise immunity and reduce the time to detect objects.

FIG. 1 shows a structural electrical circuit of the device; on. Fig. 2 is a structural electrical circuit of the first (second) frequency divider; Fig. 3 is a diagram explaining the principle of operation of the device.

The device contains (Fig. 1) a lens 1, a matrix photoelectric device with a charge switch (MFPS, level converter 3, synchronizer 4, video amplifier 5, threshold device b, and second frequency dividers 7 and 8, the first and second keys 9 and 10. The first second) frequency divider contains (FIG. 2) a counter 11, a descrambler i / and a CK-Trigger 13.

DEVICE work0 as follows,

Izobstch-oit it. an object using a lens called a TSR for photosensitivity ateln.t., opadi3 FPSZ 2. Synchrogne- 4 ор ormip WG, equal to qtszig after

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Dovelo-i d-ich, necessary for work 2. At the same time on the first foig-game. About the succession of the sh-ts upm h / governing section Hciop / -. -h i ivu, n h of memory, pt eu-it OpMnnj. The nociit of impulse im.C.o, 1, the pressure of the lower register, on the same day, the code of the last day of the pulses of the hpcp hp. and jr rrc M c6pv; Cd CCD photomap 1.mkk 2, i-gmalia control section sections. 1but, the memory clock comes in; ds ds e I1-. L synchro generator for 1 I and ;, h, id, equals FH; I; level Ta..ii I .PJTOM, ynpjFly section UIKM section pgn- ,, and section naivflTh ts11-t n ie, -i in you? ., a third of the output i. to n-; Immediately build a control panel at the input of splitter 3. consisting of (.2 of counter 11, dr1 of the digitor 12 i-RS-Tpm 1.

Cnrt-inh PR T by the lower m.trom with r “- oi1 / sync generator toooa k is served пn (. Ig (the input of the second is O), the com-

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walking to thr, -s input ir --- i r-t, s, - level bodies 3 and r m-post mc-n to the control input of the second key IQ of the pulse from the output of frequency divider 8. Thus, the control signals of the lower the register is received in batches with a period n-Ty, where Tc is the initial period of the pulses of the rows; n is the division ratio of the second frequency divider 8. Consequently, when transferring charge packets from the memory section to the lower register, the charge packets will be summed up elementwise in the lower register, arriving from n consecutive lines.

The reset transistor MFPZS 2 is controlled in the same way through the first key y. At the same time, impulses for controlling the reset transistor from the fourth output of the clock generator k are fed to the signal input of the first switch 9. From the second output of the clock generator C to the input of the first frequency divider 7, pulses are sent with a period of polling the lower register elements. From the output of the first frequency divider 7, the second input of the key 9 receives signals with a period of t-T ,,, where Tur - the period of impulses polling the lower register elements; m is the division factor of the frequency divider 7. As a result, the reset signal through the key 9 will pass with a period mp-TTz. Thus, the ar d, output from the lower register, accumulates during the output time of the m elements of the lower register by the output transistor,

The resulting video image NRL from the output of the FPA 2, proportional to the total illumination at the next site with the size rnxn of the elements of the original image, goes to n / ousili- 5, from the exit to the too n: - ,, (falls further on the threshold / stroys of 6, where g, If the specified threshold level is exceeded at the output of the device, it generates a detection signal.

At the same time, the speed is significantly increased, since there is no need to perform computational operations to implement spatial filtering during the period of interstitial polling of the MPSF 2 as it should be done in the prototype. The noise immunity of the device is improved, the detection reliability is increased, since spatial filtering (accumulation of I is carried out before the threshold

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video signal processing (binary quantization in the prototype).

The choice of threshold in threshold device 6 was essential for the operation of the device as a whole. The threshold for triggering the threshold device 6 should be set taking into account the chosen criterion of optimality of detection, permissible probabilities of errors 1 and 2 of the second kind, as well as depending on the number of elements of the FPM 2 combined into an accumulation zone (area of FIG. 3), and from signal to noise ratio. In addition, in real conditions, the choice of the threshold is easy to carry out experimentally, based on specific conditions.

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the first and second, respectively, of the frequency efters, differing from the fact that, c. In order to improve noise immunity and reduce object detection time, the first and second keys are introduced, the signal outputs of which are connected to the second and third inputs of the level converter, respectively, while the signal and control inputs of the first key are connected respectively to the fourth output of the synchronous generator and the output of the first frequency divider, and The signal and control inputs of the second switch are connected respectively to the fifth output of the clock generator and the output of the second frequency divider.

Claims (2)

1. A television device for detecting objects comprising a series-connected charge-coupled photovoltaic photoelectric device, a video amplifier and a threshold device, a lens optically coupled to a charge-coupled photoelectric photoelectric device, the control input of which is connected to the output of the level converter, the first input of which is connected to the first output of the clock generator, the second and third outputs of which are connected to the inputs 2. The device according to claim 1, characterized in that each of the frequency dividers contains a counter, the counting input of which is the input of a frequency divider and is connected to the S-input of the RS flip-flop, the inverse output of which is connected to the pre-recording input of the counter, the information input of which is the input of the division coefficient code, and the information output of the counter is connected to the input of the decoder, the output of which is connected to the S input of the RS flip-flop, the output of which is the output of the frequency divider. FIG g t Sinister zone cheeky / gene YA BUT L / L W / VZ Lul t / jfffya- press ffften / r a Figz