SU580511A1 - Device for stroboscopic conversion and measuring of electric signals - Google Patents

Description

This invention relates to electrical measuring technology and can be used in stroboscopic meters and oscilloscopes.

A stroboscopic converter containing two quartz oscillators, a stroboscopic mixer, an expander, a gating pulse generator, an expander amplifier, a step-adjustable phase shifter, a difference frequency separation unit, a continuously adjustable phase shifter, an electronic switch and a control unit 1 are known.

A disadvantage of this device is a decrease in measurement accuracy with a decrease in measurement time.

The closest to this invention in its technical essence is a stroboscopic oscilloscope containing two quartz oscillators, the inputs of which are connected to the outputs of the control unit, the output of the first generator is connected to the synchronization input of the source of the signal under investigation, the output of the second is connected to the output of the first generator to the input of the stroboscopic mixer, the second input of which is connected to the output of the source of the signal under study, the output to the input of the amplifier — pulse expander, an element of the rear rzhki connected to its output

the second input of the control unit, the beat signal detector, the first input of which is connected to the output of the first generator, the second input through the phase shifter to the output of the second generator, and the output through the pulse shaper to the output of the delay element and the first input of the control unit 2.

A disadvantage of this device is the large analysis time of the signals under study, which is caused by the gating of the signal under study during the entire repetition period.

In order to reduce the analysis time of the studied signals, a device for stroboscopic conversion and measurement of electrical signals contains a strobe pulse generator, the output of which is connected to the first inputs of two stroboscopic mixers, the second inputs of which are connected to the input terminals and the outputs through amplifiers to the output terminals and inputs of two units the comparisons, the outputs of which are connected to the first and second inputs of the reference block, and the shaper of the synchronization pulses, are equipped with two generators of percussive excitement spinning, two dividers frequency electrical oscillation generator and the sawtooth generator control pulses, whose first output

connected to the input of the sawtooth generator

voltages, the second output is with the third input of the reference block, and the third output is with the inputs of shock excitation generators, the outputs of which are connected to the inputs of the frequency dividers, the output of the first divider is connected to the input of the sniper driver, and the output of the second is with the input of the strobe pulses .

The drawing shows a structural electrical circuit of the proposed device.

The device consists of control pulse generator 1, reference block 2, shock excitation generators 3 and 4, sawtooth voltage generator 5, electric oscillation frequency dividers 6 and 7, synchronization pulse generator 8, strobe pulse generator 9, stroboscopic mixers 10 and I, amplifiers 12 and 13, comparison units 14 and 15.

The device works in the following way.

The outputs of the generator of control pulses 1 take off the reset pulse of the reference unit 2, the starting pulse of the shock exciters for day 3, 4 and the start pulse of the sawtooth generator 5. The sawtooth voltage from the output of the sawtooth generator 5 is used for scanning external recording devices. From the output of the shock excitation generator 3, a radio pulse signal with a frequency / I is applied to the input of frequency divider 6. From the output of frequency divider 6, a signal with a frequency / 1 / L1 is fed to the input of the driver 8 of the source synchronization pulses of the signals under study. The output pulse signal from the shock excitation generator 4 with the frequency fz is fed to the input of frequency divider 7. From the output of the frequency divider 7, the voltage with frequency / 2/2 is input to the input of the strobe pulse generator 9.

From the output of the generator 9, the strobe pulses with the frequency / 2/2 are fed to the first inputs of the stroboscopic mixers 10 and I. The second inputs of the mixers 10 and I receive signals with the frequency / 1 / H1 from the source output of the signals being studied. Due to the difference in the frequencies of the studied signals and the gating pulses, the time scale of the investigated signals is transformed. The output converted signals of the stroboscopic mixers 10, 11 are fed through the amplifiers 12, 13 to the inputs of the comparison units 14, 15 and to the output terminals. When the reference levels with the converted signals are equal, the blocks compared to 14, 15 produce starting and stopping pulses of the reference block 2. The analysis time is determined by the duration of the control generator pulse equal to

Stupid (J and 3)

where q is the transformation ratio,

113 - the duration of the measured interval

in real time. The necessary read jaw can be selected by changing the division ratio of one of the frequency dividers.

The introduction of new elements and connections allows to reduce the time of analysis of the studied signals.

Claims (2)

1. USSR author's certificate №46213, cl. G 01 K 13/34, 1973. 2. USSR author's certificate jYe 464823, cl. G 01R 13/20, 1973.