SU462175A1 - Input device - Google Patents

Description

The invention relates to the field of computer technology and can be used in devices for inputting visual information into digital computers. Information input devices are known that contain a transmitting television tube connected in series, a video amplifier connected to a video monitoring unit, a gating unit, a matching unit, and a computing machine. However, in such devices, it is necessary to mechanically move the image carrier during the reading process in order to ensure that information from the entire image field is entered into the digital computer. The purpose of the invention is to expand the functionality and improve the accuracy of the device. For this, two electronic counters, a comparison circuit, two generators and a pulse shaper, are introduced into the device, the first electronic counter being connected to the first and second generators connected to the transmitting television tube, and. with the comparison circuit, and the comparison circuit with the second electronic counter connected to the first generator and the driver of the pulses connected to the gating unit. The block diagram of the device shown in the drawing. The device works as follows. The visual image is converted by the transmitting television tube 1 into a video signal fed to video amplifier 2. Synchronization of the first generator 3 performs a frame scan from the second generator 4, the second generator performs a horizontal scan through the first electronic counter 5, which functions as a frequency divider appearing at the output of the first electronic meter at the moment all its bits are set to the “O) position. A second electronic counter 6 is connected to the output of the generator 3. The inputs of the comparison circuit 7 are connected to the corresponding bits of the electronic counters 5 and 6 in such a way that a certain ratio of numbers recorded by the electronic counters (for example, when they are equal) at the output of the comparison circuit occurs 8 pulses arriving at the shaper. The output signal from video amplifier 2 passes to gating unit 9. If necessary, the signal from the output of the video amplifier 2 can also be supplied to the video control unit 10. Gating unit 9 passes the signal from the output of the video amplifier to the input of matching unit 11 only if a gating pulse from the pulse generator is fed to the second input of the gating unit, i.e., provided that a certain ratio between the read frame numbers and the read line is provided. For example, during the first read cycle (frame), the information read from the first raster line is fed to the input of the matching block, the second cycle from the second line, and so on.

In the matching unit, the information is converted into a code arriving at the input devices of the computer 12.

Subject invention

A device for inputting information, comprising a serially connected transmitting television tube, a video amplifier connected to: a video monitoring unit, a gating unit, a matching unit and a computing machine, which

In order to expand the functionality and increase the accuracy of the device, two electronic counters, a comparison circuit, two generators and a pulse shaper, were introduced into it, the first electronic counter being connected to the first and second generators connected to the transmitting television tube and a comparison circuit connected to a second electronic meter connected to the first

generator, and a pulse shaper connected to the gating unit.