SU1029206A1 - Device for measuring parameters of television signal - Google Patents

Abstract

A DEVICE FOR MEASURING THE PARAMETERS OF A TELESIGNAL comprising an image sensor, a first time delay control unit, the first output of which is connected to the generator, a memory unit and a parameter registration unit, characterized in that, in order to verify the accuracy, an address code generator and the second time delay control unit; the output of the image sensor is connected to the first input of the memory unit, the output of which is connected to the first input of the parameter registration unit; the first input of the syncro the generator is connected to the first input of the image sensor, the second output of the synchronous generator is connected to the first (2nd input of the address code generator, the first output of which is connected to the second input of the memory unit, and the second output is connected to the first input jfSSOCT of the first time delay control unit, the third output the synchronous generator is connected to the first input of the second time delay control unit, the first 1 5th output of which is connected to the second input of the tarameter registration unit, the second output of the second control unit time delay Coy vtorsmu Connected to the control input of the first unit time delay "a second output connected to a third input of the third memory unit output a first control time delay coupled to a second | an image sensor input and with a four-fold memory block input.

Description

The invention is intended for use in a television measuring technique, as well as in a television image analysis and processing system. A large number of devices are arranged on the image sensor, which includes a projection cathode ray tube (CRT). Examples include precision electron-beam automated systems ELAS 1 and 12 and MELAS 31 for measuring the coordinates of objects in photographs with traces of nuclear particles in the Mirabel large bubble chamber. The ELAS system contains three measuring channels, each of which measures one of three frames. stereodriad stereo camera Mirabel. These channels are combined into one system, equipped with a console, on television screens of which the operator presents images of any of the three frames of the processed stereo triad and graphic information obtained as a result of processing in a computer. The system allows selective reading of information by television microrasters on the plots in any sequence with adjustment of the readout parameters of the raster to the structure of the processed track. Similar in function to the value of the system. MELAS is characterized by the presence of a special digital-analog calculator for correcting the size and shape of a CRT spot caused by the curvature of the image. The use of correction made it possible to obtain a spot diameter in the center of a CRT of 18 μm, with a deflection of 22 μm at the edge of the working floor of the screen. Both considered automata, in spite of the requirements of high accuracy of measurements, and the formation of finite values of single samples, do not teach the effect of the afterglow of a CRT. The closest in technical essence to the present invention is a device for measuring parameters of an image signal, comprising an image sensor, a first time delay control unit, the first output of which is connected to the input of a clock generator, a memory unit and a parameter registration unit C47, the disadvantage of this device is The presence of an error caused by the afterglow effect in a CRT, the input of ajeft images by the influence of the designation of single samples, is recorded. at the output of this system. This deficiency in fact does not make it possible to use this device in those systems that are dictated by the use of RT with any tactical and technical requirements. fairly long afterglow. For example, such a situation arises when calibrating precision photoregistering devices (FRU), in which a projection CRT is used with a Type A phosphor, having an afterglow of about a few microseconds. Zbel of the invention is to increase the accuracy of measurements by eliminating errors caused by the afterglow effect. This goal is achieved in that the device for measuring the parameters of the television signal containing the image sensor, the first control unit — time delay, the first output of which is connected to the input of the synchronous generator, the memory unit and the parameter registration unit — are inserted into the address code generator and the second time delay control unit The output of the image sensor is connected to the first input of the memory unit, the output of which is connected to the first input of the reg unit; Parameter settings, the first output of the synchronous generator is connected to the first input of the image sensor, the second output of the scroll generator is connected to the first input of the address code generator, the first output of which is connected to the second input of the control panel, and the second output is connected to the first. the first input of the time delay control unit, the third code of the synchronous generator is connected to the first input of the second time delay control unit, the first output is connected to the second input of the parameter registration unit, the second output of the second time delay control unit is connected to the second input of the first time control unit the delay-, the second output of which is connected to the third input of the memory unit, the third output of the first control unit of the time delay is connected to the second input of the image sensor and a fourth input of the memory unit. Fig. 1 is a structural diagram of the proposed device; in fig. 2 is a functional diagram of an address stake maker in FIG. 3 is a functional block diagram of a time delay control unit. The device contains a sensor kzobra-. 1, sync generator 2, memory block, 3, parameter registration block 4, address code generator 5, time delay control block b, output 7 of this block, and time delay control block 8. The functional circuit of the address code generator 5 (Fig. 2) contains an input of 9 and 10, a binary counter 11, counters 12, 13, and 15 and an OR 16 element. The functional diagram of the time delay control unit (Fig. 3) contains inputs 17, 18 , 19 and 20, shift register 21, element NOT 22, binary code generator 23, elements AND 24 and 25, impulse amplifier 26. The device works as follows. The time delay control block b (Fig. 1) connected to the address code 5 shaper and to the time delay control block 8, triggers control pulses that are sent to the CRT modulator of the image sensor 1, providing a short-term ) beam illumination. The same pulses arriving at the first input of memory 3 provide for recording the current values of the output signal of the image sensor 1 arriving at the information input of memory 3. The synchronization generator 2 provides this scanning mode, ri which each raster line is scanned ti / fv / pas.- -., -.-- reading storage device and fixation final values of individual samples in a block register tion parameters 3 4 occurs during the return stroke sensor reads the image of the aperture. Consider the passage of signals in the shaper 5 of the address code (FIG. 4) Lower-order signals with pulses and pulses of the frequency f GG from the time delay control unit 6 are received at the block. Counter 11 converts pulses of frequency f G to pulses with a clock frequency f. Corresponding to the required frequency Pulses are fed to the input of the counter 13 with the conversion factor h / N, the inverse input of the zero setting of which receives the horizontal quenching pulses, so the meter 13 generates the code of the readout address during the horizontal quenching pulse This corresponds to the reverse of the counting aperture of the image sensor. In addition, the clock frequency pulses 9 are fed to the input of counter 1 with a ri / N recalculation factor. The zero input of the counter 12, as well as counter 14, is controlled by the horizontal damping pulses, therefore - counters 12 and 14 generate a write address code during the forward path of the image sensor reading aperture. At the output of the last bit of counter 12, there are pulses with a frequency that are sent to the second strobe control unit with a signal, and ie the input account .chka 14 with scaling factor N is connected to which output counter il5, control personnel generator | sweep a synchronous generator, which is made according to a digital scheme and provides scanning of each line of the raster / N times. The write address code, taken from all bits 14, is fed to the second strobe control signal unit, as well as to the OR element 16, the second input of which receives the code of the read address from the output of the higher digit bits of the counter. Thus, at the output of block 6, we have an address code, which is then fed to memory block 3. Consider the operation of the second time delay control block (Fig. 3). The information input of the Horon / N -discharge shift register 21 is received by pulses with a frequency of 5 address codes, and to the clock input of the same register, lower-case damping pulses are received from the synchro-generator. Thus, at the output of the register we have a running unit. Essods of all register registers are connected to a binary code generator 23, from which output (lGg2 -) - a parallel parallel binary code goes to AND 24 element, to the second input of each (log2 -) bits of which a write address code is supplied from the forwarder 5 address code. Thus, at the output of the coincidence circuit, there are pulses with a frequency .-) / which, during the - decomposition lines, are shifted in time relative to each other by one clock frequency period. These pulses carry information about the moments of the required illumination of the CRT beam of the image sensor. Next, these pulses go to one of the inputs of element I 25, the second input of which is supplied with a strobe from the first control unit time-derived, and from the output of the element I, the light pulses go to the pulse amplifier 26, the output of which is connected to the CRT modulator of the image sensor, and also to the first control input of the memory unit. To the second control input of the memory unit, read pulses are generated, which are generated from the strut damping pulses by the HE element 22 and ensure the reading during the reverse stroke of the readout aperture. The use of the proposed device contributes to a significant increase in the accuracy of television measuring systems used for image analysis and processing.

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Claims (1)

(, 54) (57) A DEVICE FOR MEASURING THE TELESIGNAL PARAMETERS, comprising an image sensor, a first time delay control unit, the first output of which is connected to the input of the sync generator, a memory unit and a parameter registration unit, characterized in that, in order to increase the reliability, the device is introduced shaper of the address code and the second time delay control unit, the output of the image sensor is connected to the first input of the memory unit, the output of which is connected to the first input of the parameter registration unit, the first output of the clock the heater is connected to the first input of the image sensor, the second output of the clock is connected to the first input of the address code generator g ca, the first output of which is connected ~ to the second input of the memory unit, and the second output is connected to the first input of the first time delay control unit, the third output of the clock p * ³ ® ^ of the gate is connected to the first input of the second time delay control unit, the first output of which is connected to the second input of the parameter registration unit, the second output of the second time delay control unit It is connected to the second input of the first time delay control unit _Λ whose second output is connected to the third input of the memory unit, the third output of the first time delay control unit is connected to the second input of the image sensor and to the fourth input of the memory unit.