SU585447A1 - Indicating-measuring device - Google Patents

Description

(54) INDICATOR AND MEASURING DEVICE

one

The invention relates to a measurement technique and can be used in measuring amplitude-frequency characteristics.

An indicator-measuring device is known that supports amplifiers of vertical and horizontal rtoning and an electron beam tube with a scale grid deposited on the outer side of screen 1.

 A disadvantage of this device is the large amount of measurement error of the measurement results.

The closest to the invention to the technical essence is an indicator-measuring device containing a cathode-ray tube, the beam modulation input of which is connected to the output of the combiner, the source of light pulses of scaling lines, horizontal and vertical sweepers Ij2. .

The disadvantage of this device is also the large magnitude of the measurement reference error.

The purpose of the invention is to reduce the measurement error of the measurement results.

This is achieved by the fact that the indicator-measuring device

containing a cathode-ray tube, the modulation input of the beam of which is connected to the output of the combining unit, the first inputs connected to the source of pulses of light of the scale lines, the horizontal and vertical scan generators, is equipped with a coincidence unit, a clock generator and an electronic switch, the first input of which is connected to the terminal of the signal under study, the second input — with a horizontal scanning generator, the output — with the horizontal deflection devices of the cathode ray tube, the control input — with rvym output clock pulse generator, a second output connected to the first input, the coincidence unit, a second input coupled to a source of illumination pulses of the measuring line, and the output - to the second input of the combiner.

The drawing shows a structural electrical circuit of the device.

Claims (2)

The device consists of an aggregation unit 1, a cathode ray tube 2, a coincidence unit 3, a clock generator 4, an electronic switch 5, a horizontal scanning generator 6, a source 7 of measurement light pulses, a vertical scanning generator 8 and a source 9 of ascent pulses of scale lines . The device works as follows. At the first input of the switch 5, the signal being studied slowly changes. The second input of the switch 5 from the output of the generator b receives a horizontal scan signal, for example, a sawtooth, with a frequency of 16-25 Hz. The control pulses are fed to the control control input switch 5c of the clock output generator 4c. The output signal of the switch 5 is used to deflect the tube beam horizontally. Since from the outputs of the source 9, pulses are received for blocking the scaling lines to the modulation input of the beam of the tube 2 and the vertical beam is turned by the vertical scan generator 8, the image of the scale lines repeating with the horizontal frequency 16-25 Hz, prg this image of the scale lines is visually perceived as continuous. From the output of the source 7, the pulses of the illumination of the measuring line arrive at the input of the block 3 of coincidence, to the second input of which impulses come from the output of the generator 4 clock pulses. In this case, pulses from the output of block 3 through block 1 enter the tube modulator and highlight the image of the measuring line only at those moments when the CRT beam moves horizontally to points determined by the voltage of the signal under study. Thus, the image the measuring line is spread around the screen with a slowly varying signal under study. In order for the image of the measurement line to be visually perceived as continuous, the frequency of the clock pulses must be much higher than the frequency of the signal being studied. Their ratio is chosen depending on the screen size, resolution of the tube capacity, frequency of the horizontal sweep generator, period of the lightly changing needle and can be 100 ... 300 Introduction to the diagram of the indicator-changing device of the coincidence unit, generator, clock pulses and electronic the switch allows you to display on the cathode ray tube screen an image of the scale lines, unrolled at a frequency, an independent scanning frequency of the measuring line and an easy-to-read result Comrade Measurements, ie leads to a decrease in measurement reference errors. The invention of an indicator-measuring device, containing 14e electron beam Tjiiy6Ky, the beam modulation input of which is connected to the output of the combining unit, the first inputs of which are connected to the source of light pulses of large-scale lines, generators of horizontal and vertical scans, that, in order to reduce the measurement error of the measurement results, it is equipped with a coincidence unit, a clock pulse generator and an electronic switch, the first input cat The second is connected to the terminal of the signal under study, the second input is connected to the horizontal sweep generator, the output is connected to the horizontal organs, the deviation of the cathode ray tube, the control input is to the first output of the clock generator, the second (the OUTPUT is connected to the first input of the coincidence unit, the second the input of which is connected to the source of pulses of the illumination of the measuring line, and the output - to the second input of the combining unit., Sources of information taken into account during the examination: 1. Adomenas P., etc. Measuring amplitude -frequency characteristics. M., Holy Hour, 1968, p. 97, 98. 2.Adomenas P. et al. Measuring amplitude-frequency characteristics. M., Holy Hour, 1968, p. ten.