SU903918A1 - Information readout device - Google Patents

Description

I

The invention relates to automation and computing, in particular to devices for reading information, and can be used in analyzing chemical or physical processes in the presence of liquid, gases or solid

particles.

Information reading devices 2 are known,

The first of the known devices includes a television sensor, a gated cascade, an analog-to-digital converter, a gating pulse generator, a sampling pulse generator, X and Y coordinate voltage bleats, a diaphragm pulse generator, a control unit, a video monitor, a control 1 frequency divider and mixing .sitel 1.

However, a significant drawback of such a device is the complexity of the hardware solution, low reliability and impossibility of using it.

its for signal processing.

Another device is known that contains a memory block connected to a television sensor and a synchronous generator, whose outputs are connected to counters, a trigger connected to an element AND whose other input is connected to a pulse generator, an adder connected to a block j video controller, a comparator, connect -; with the memory unit, and the elements

AND, OR 2.

The disadvantage of this device lies in its low accuracy.

10 devices.

The purpose of the invention is to improve the accuracy of the device.

The goal is achieved by the fact that, in a device containing 15 blocks, a memory connected to a television sensor, to a first comparator and to a selector, whose outputs are connected to a synchronized pulse generator, to the first and second

20 counters, a pulse generator and a trigger, the input and output of which are connected to the second counter, an adder connected to the video control unit, and a driver of control signals, memory elements are entered,

25 connected to the outputs of the first and second counters, respectively / a third counter connected to the selector and to the synchronized generator, pulse generator, the second comparator.

YU

the inputs of which are connected to the third counter and to the second memory element, and the outputs are connected to the inputs of the memory elements and to one input of the adder, the other inputs of which are connected to the first jTopy compiler, to the pulse generator and to the selector, and the ZI-NE element whose inputs connected to a pulse generator and comparators, and the output is connected to a control driver.

FIG. 1 is a block diagram of the device; in fig. 2 — gating pulse shaping unit; in fig. 3 - unit for determining the coordinates; in FIG. 4, a synchronization unit.

The device includes a television sensor 1, a memory block 2, an adder 3, a video control unit 4, a first comparator 5, an element ZI-NO. b, shaper 7 of control signals, block 8 of generating gating pulses, synchronized generator of 9 pulses, block 10 of determining coordinates, block 11 of synchronization, generator of pulses 12, with block 11 containing a selector 13 and trigger 14, block 8 containing a third counter 15 and a second the comparator 16, and the block 10 contains the first 17 and second 18 counters and the first 19 and second 20 memory elements. , The drawing (FIG. 1) also shows the chemical reactor 21, the source. 22 lights and a button 23 in the trigger circuit 14 (FIG. 4).

The device works as follows.

The source of information, for example, the model of the reactor 21 on transparent walls, is illuminated by a light source 22 behind it, for example a fluorescent lamp. A television sensor 1 located on the opposite side of the reactor layout 21 removes the hydrodynamic process occurring inside the reactor layout, during which 7 bubbles, jets, bursts and other elements occur in the test medium, the study of the shape and motion of which makes it possible to judge the hydrodynamic features process. As a result of illumination, these elements become clearly visible against the background of their environment. From sensor 1, information on the movement and form of the elements of the medium under investigation is recorded in memory block 2, for example, in a video recorder. After that, the information recorded in block 2 is viewed on block 4. During the scan, the most interesting moment from the point of view of the investigator is selected and the video recorder is switched to the still picture mode (Stopframe). After studying the stopped image, select it.

a plot for a more detailed study, and the video signal from the output of block 2 is fed to the input of the first comparator 5, where it is converted from a multilevel, corresponding to a multi-tone image to a two-level, corresponding to a two-graded, binary digital image. .

The signal is then fed to one input of the ZI-NOT b element, the second input of which receives short pulses from the output; 1a of block 8, and the third input — pulses from the generator output of 12 pulses, which are used to limit the analyzed field of the image to a rectangular aperture. As a result, short sections of the image are distinguished.

At the same time, the signal from the output of block 2 is fed to the input of block 11, which controls the synchronous operation of block 8, generator 12 pulses, synchronized generator 9 pulses and block 10. Element ZI-HE 6 produces a logical multiplication of the input signals, as a result of which the output signal represents short pulses equal in duration to the pulses arriving from block 8. Moreover, this signal appears only when the temporal position of the gating pulses coincides with the temporal position of the signals from the compare output torus 5, corresponding to the bright areas of the image located only inside the bounding aperture,

The strobe pulses by the block 8 are generated by comparing the code of the pulses coming from the output of the generator 9 with the code of the counter 18 of the block 10, which functions as the counter of half-frames of the image. The counter 15 of block 8 is set to the zero state with the passage of each successive, horizontal synchronizing pulse. Therefore, in each half-frame of the image, a strobe pulse is formed at the moment of coincidence of the number of this half-frame from the beginning of the conversion cycle with the number of the sampling pulse from the beginning of each line in the given half-frame,

Claims (2)

Thus, in each individual half frame, the amplitude of the input video signal is analyzed along the image column, the X coordinate of which corresponds to the half frame number from the beginning of the conversion cycle, and coordinate. Each of the analyzed image elements in the column is determined by the row sequence number in the given half frame. e. counter code 17 (horizontal sync pulses) of block 10 The image conversion cycle ends when the counter 18 (half-frames) of block 10 overflows. The overflow signal from the output of block 10 enters the block 11, which, upon the arrival of this signal, generates a pulse setting counter 18 (half-frames) of block 10 to the zero state and prohibition of the account of half-frames. The obtained X and Y coordinates, which determine the position of the elements of the image under study, should be applied to the computer inputs for subsequent processing. The enable signal for recording coordinates.X and Y in the computer memory is supplied from the generator 7 to the control signal. The introduction of new nodes and blocks has significantly improved the accuracy of the proposed device. The invention A device for reading information containing a memory unit connected to a television sensor, to a first comparator and to a selector whose outputs are connected to a synchronized pulse generator, to the first and second counters, to the pulse generator and to a trigger, the input and output of which are connected to the second counter, an adder connected to the video control unit, and a driver of control signals, differing in that in order to increase the accuracy of the device, it contains memory elements connected to The outputs of the first and second counters, respectively, are the third counter connected to the selector and to the synchronized pulse generator / second comparator, whose inputs are connected to the third counter and to the second memory element, and the outputs are connected to the memory inputs of the memory elements and to one input of the adder, the other inputs of which are connected to the first comparator, to the pulse generator and to the selector, and the ZI-NE element, whose inputs are connected to the pulse generator and to the comparators, and the output is connected to the control signal generator . Sources of information taken into account in the examination 1. USSR author's certificate number 415830, cl. G H 11/00, 1971. 2. Australia Patent 504010, cl. G About K 9/12, published. 1979 (prototype). 22 Hoftrrofteffff fug. ffffi f / iOfcy9  f (ooaSa ftfffT i / r From f / fOKo ff FIG.