SU374649A1 - ALL-UNION - Google Patents

Description

The invention relates to automatic devices for converting the coordinates of objects into a digital code and can be used, for example, in a television converter of the coordinates of high energy particles detected by a spark chamber into a digital code. Television devices are known for automatic filmless transformation of the coordinates of high energy particle traces detected by a spark chamber, containing a transmitting vidicon camera, a video signal amplifying unit, storing and encoding units, and a sync generator. The known devices are characterized by the following disadvantages: insufficient stability of the raster of the vidicon, which is caused by instability of the focusing current, voltages on the first and second anodes, the amplitude of the deflecting currents of the horizontal and vertical scans, which requires frequent recalibration of the light-video signal-digital code that in turn, it requires increasing the memory capacity of the storage device and expanding the capabilities of the electronic digital computing machine; the influence of the signal irregularity in different parts of the raster on the accuracy of determining the coordinates due to the fact that the counting pulses are formed at different levels of the video clip, and their fronts are least subject to temporal modulation in the mean but amplitude of the part; low speed transformed the coordinates on the vidicon because of the need to erase the residual image on the target within 4-5 frames after the frame of the coordinate measurement. To increase the accuracy of operation, a compensating voltage generator and a switch are introduced into it, the inputs of which are connected to the output of the decoder and the fourth output of the synchronous generator, and the output are connected to the frame and horizontal generators respectively, and the inputs of the compensating voltage generator are connected to the five and sixth outputs of the synchronizing generator The output is connected to the second input of the shaper. FIG. 1 shows a block diagram of a converter; in fig. 2 - timing diagrams of the proposed Converter. In the drawings, the following designations are accepted: - Loo 1 - transmitting video camera; 2- gain block; 3- shaper; 4- time selector; 5- memory block; 6- coding block; 7- compensating voltage generator;

8-sync generator;

9- high frequency generator;

10- counter;

11- decoder;

12- switch;

13- line scan generator;

14- controlled frame sweep generator;

15- frame with two vertical and two oblique lines-renerami, projected on the Vidicon's mouse;

16 is a signal from a generator of voltage compensation;

17-video signal;

18- formed pulse at the output of the shaper with a controlled level;

19- signal from the synchronous generator to the time selector;

20- the pulses from the benchmarks selected by the time selector;

21 pulses from the object being measured;

22- signal from the decoder;

23- signal from the synchronous generator to the switch;

24- voltage variation of the voltage boost of the controlled horizontal line generator (frame scan).

The device works as follows.

When the electron beam is scanned by a vidicon, pulses from benchmarks 20 and from measured object 21 are received from the output of gain unit 2, which are fed to the input of shaper 3 with a controlled formation level. The control input of this driver is supplied with a signal 16 from the generator of the compensating voltage 7, which varies in accordance with the line and frame amplitude unevenness of the video signal 17. Video pulses are generated in the middle part of the video pulses that is least subject to noise modulation. At the same time, this driver performs the role of an amplitude selector. In such a case, two frames of erasing the residual image after the coordinate measurement frame are sufficient. The formed sequence of pulses 18 with standard fronts and amplitude is fed to the time selector 4, at the output of which the pulses 20 from the frames are separated from the pulses 21 of the object being measured. The first pulse 20 on the row, the counter 10 starts, and the second pulse 20 on the row, the counter stops. Result

the counting is determined by the decoder /) and fed to the switch 12.

On the first line of the raster, the result of measuring the time interval 22 between the vertical contrast lines of the frame 15 is fed through the switch 12, controlled by the signal 23 of the synchronizing generator 8, to the input of the controlled horizontal scanning generator 13. On the last line of the raster, the result of measuring the time interval between the inclined contrast-colored lines of the frame 15 is fed through a switch 12, controlled by the synchro-generator 8, to the input of a controlled personnel sweep generator

5 14. In accordance with the result of measuring the time intervals on the nerve and the last lines of the raster, the controlled supply voltage is applied to the controlled generators of the horizontal and vertical scans.

0 24 (for each generator its own source), which causes a change in the range of the deflecting current in the right direction.

Subject invention

5 An object coordinate converter into a digital code containing a transmitting video camera connected to the first output of the synchronous generator and through a serially connected gain unit and driver to the first input of the time selector, the second input of which is connected to the second output of the synchronous generator, the first output through the storage unit connected to the encoding unit and the second output through the counter with the first input of the decoder, the second input of which is connected to the third output of the synchronous generator, the high-frequency generator, the first The output of which is connected to the second input of the counter, and the second output to the input of the sync generator, frame and line scan generators, and a frame with contrast-colored lines, characterized in that, in order to improve the accuracy of the converter, a compensating voltage generator and a non-switch, the inputs of which are connected to the output of the decoder and to the fourth output of the synchronizing generator, and the outputs are connected respectively to the vertical and horizontal generators, the inputs of the compensating voltage generator, dklyucheny to the fifth and sixth outputs of the timing generator, and an output connected to the second input of.

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