SU444118A1 - Device for measuring instantaneous values of periodic electrical signals - Google Patents

Description

one

This invention relates to electrical measuring technology.

A device for measuring instantaneous values of periodic electrical signals is known, comprising an input device with a delay line, a gating circuit, an amplifier, an amplitude-to-voltage converter, an adjustable gating delay circuit, a gating pulse shaping circuit, and a switch.

Such a device is unsuitable for joint measurement of instantaneous values, time and amplitude parameters of periodic electrical signals.

The purpose of the invention is to expand the functionality of the device.

For this purpose, a dial gauge connected to the output of the amplitude-to-voltage converter, a gating delay adjustment circuit, an additional switch, a calibration circuit are introduced into it, the input device with a delay line, a gating circuit, an amplifier, Amplitude to voltage transducer; in addition, a series-connected adjustable circuit is connected to the device input via a switch. second delay and gating circuit generating strobe pulses, the output of which is connected to a gating circuit furthermore adjustable delay circuit is connected through input gating pulses calibration circuit to an additional switch.

Its principle of operation is based on gating a narrow part of the measured signal with the subsequent conversion of the pulse amplitude into a voltage level, which is measured by a pointer instrument.

The drawing shows a block diagram of the proposed device.

The measured signal is fed through an input device with a delay line 1, which serves to study the leading edges of the pulses, is fed to the gating circuit 2, by means of which a "narrow part of the signal is cut out." For this purpose, to the second input of the gating circuit 2, the gating pulse shaping circuit 3 is supplied with pulses with a duration much shorter than the duration of the measured signal.

The position of the gating pulses relative to the measured signal can be varied using an adjustable gating delay circuit 4, the output of which is connected to the input of the gating pulse shaping circuit 3. The gating delay circuit 4 has a manual delay adjustment calibrated in units of time. Adjustable delay lines, fantastic circuits, etc. can be used as a gating delay circuit 4. Gating delay circuit using a switch 5 "External - Internal is triggered either by external auxiliary pulses synchronous with the measured signal or by the measured signal itself. "The cut-out part of the signal from the output of the gating circuit 2 through the pulse amplifier 6 is fed to the transducer 7 amplitude of the pulses to the voltage level, which is measured by the pointer device 8. The calibration pulse pulses are applied to accurately measure the instantaneous values of the signal selected by adjusting the gating delay. having output pulses of reference amplitude. The output of the calibration pulse circuit 9 using the 10 "Calibration-Measurement switch is connected to the input of the input device 1 instead of the measured signal. The input of the calibration pulse circuit 9 is connected to the input of the gating delay circuit 4, which ensures synchronization of the gating and reference pulses at the input of the gating circuit 2 and equality of the pulse repetition periods at the output of the gating circuit 2 in the "Measurement and Calibration" modes, increasing the measurement accuracy. Using a pointer instrument and calibrated adjustment of the gating delay, it is possible to investigate the waveform, measure the temporal parameters of the signals (for example, the duration of the pulses, the duration of the edges). When the value of the adjustable gating delay is longer than the period of the measurement signal 4., it can be carried out without an input device with the delay line 1, which eliminates the distortions they introduce into the measured signal. In this case, the measured signal is fed directly to the input of the gating circuit. Object of the Invention A device for measuring instantaneous values of periodic electric signals, comprising an input device with a delay line, a 1P-1 strobe circuit, an amplifier, an amplitude-to-load converter, an adjustable gating delay circuit, a gating pulse shaping circuit, and a switch characterized in that expanding the functionality of the device, a dial gauge connected to the output of the amplitude converter to voltage has been introduced to it; gating delay, additional switch, calibration circuit, serially connected input device with delay line, gating circuit, amplifier, amplitude-to-voltage converter connected to the device input, additionally adjustable delay circuit connected to the device input through the switch gating and the formation of gating pulses, the output of which is connected to the gating circuit, in addition The input of the adjustable gating delay circuit is connected through an pulse calibration circuit to an additional switch.

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.Kalidrabk

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