SU1275491A1 - Device for reading information from screen of oscilloscope - Google Patents

Abstract

The invention relates to the field of automation, in particular to the device-. for scans ;, information from the oscilloscope screen when you see parameters of the registered processes. The purpose of the invention is to improve the accuracy of the device. The goal is achieved by digitizing the readout field, with a given accuracy to fixing the luminous flux from the corresponding discrete element of the schanshit, according to the coordinate of which the su-; d t about the coordinates of the read points. 1 hp f-ly, 2 ill.

Description

The invention relates to automation and computing, in particular to devices for scaling information from an oscilloscope screen, and can be used to measure the parameters of the processes under investigation.

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

Fig, 1 shows the block diagram of the device; FIG. 2 shows an example of an implementation of the element OR.

The device includes a line of 1 point photodetectors, the first group of elements OR 2 and 3, the second group of elements OR 4, the third group of elements SH 5 and 6, the fourth group of elements OR 7, the element OR 8, the signal selectors 9 and the input 10 to which pulses from a real-time pulse generator.

The device works as follows.,

The corresponding photodetector of line 1 is considered to be the first informative point on the process image, which indicates the beginning of the image line of the process parameter. With the help of another photodetector, the second informative point is read, which is indicated by the end of the line of the image of the parameter. Since the photoreceivers are located in the same coordinate system and their mutual arrangement is unchanged, the distance between the photoreceivers is a function of the value of the measured parameter.

The signal received in the chains of the photodetectors of the ruler 1 of the first point and the second point is converted into a positional (distributed in space) parameter signal by projecting the light flux respectively to the first light source (not shown) with a zero coordinate and

the second light source (not shown) with the coordinate corresponding to the current value of the parameter. These options are performed using round fiber optics. The coordinate of the second light source is the amplitude of the positional signal and is functionally dependent on

the numerical value of the parameter of the process under investigation. .

The resulting positional signal is compared to discrete normalized resolution levels. The selection of these levels by quantizing the coordinates of the second light source (i.e., the amplitude of the positional signal) arranged in line (parallel to the coordinate line of the light source) in ten-digit code by fine-tuned photoreceivers. As these photodetectors use polished ends of round fiber

0 light guides. In this case, the quantization stage is established on the basis of the required resolution (accuracy) of forming the output signal of the parameter. When the amplitude of the positional signal coincides with one of the normalized levels, this signal is detected into the output three-digit signal of the parameter of the process under study. In the form of an optical combinated, ten-digitly-digitized code.

The formation of this code is carried out in the following way.

5 Luminous flux in the circuit connected to the input of the corresponding photodetector of the ruler 1, which uniquely define its position, i.e. coordinate,, is transformed into an optical unit decimal code by switching this stream in the corresponding elements OR 2-8.

The unitary code obtained in this way serves the selectors of 9 signals, where this code transforms

5 into the optical combined unit-decimal sampled code by selecting in time the single signals in each bit of the unit-unit code by applying pulses from the generator (not shown) to the input 10 to the inputs of the selector.

Claims (1)

Invention Formula I. A device for reading information from an oscilloscope screen, containing a line of point photodetectors, the inputs of which are optically connected to the screen of the oscilloscope, and the outputs are optically connected to the inputs of the corresponding OR elements of the first and second groups, signal selectors, one inputs of which are the device input , and the OR element whose output is connected to another input An appropriate signal selector, characterized in that, in order to improve accuracy, it contains