SU880224A1 - Device for measuring electric pulse signals - Google Patents

Abstract

A DEVICE FOR MEASURING PULSED ELECTRIC SIGNALS, comprising a series-connected input converter and a pulse amplifier, a display unit and a forming trigger; characterized in that, in order to improve: measurement accuracy, an inertial element, a differentiation unit, a phase inverter with direct and inverse outputs, two straightening units and two threshold units are introduced, the output of the pulse amplifier is connected through series-connected inertial element and the unit differentiation to the input of the phase inverter, the direct and inverse outputs of which are connected through the first connected power supply unit in series and the first threshold unit, the second rectifier unit and the second thresholds block to the corresponding inputs of the display unit, and the S outputs of the first and second blocks are you (A) are also connected to separate inputs of the forming trigger.

Description

The invention relates to electrical engineering. The device can be used for non-contact monitoring of pulsed electrical signals, for the diagnosis of failures in nodes and blocks of electronic equipment, computer technology and electrical equipment.

A device for measuring pulsed electrical signals, ¹⁰ comprising a series-connected input converter and a pulse amplifier, an indication unit and a forming trigger £ lJ.

However, the measurement accuracy of pulsed electrical signals by the known device is low.

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

For this, an inertial element, a differentiation unit, a phase inverter with direct and inverse outputs, two rectification units and two threshold unit, and the output of the pulse amplifier is connected through a series-connected inertial element and a differentiation unit to the input of the phase inverter, the direct and inverse outputs of which oedineny ₃₅ connected in series through the first rectification unit and the first threshold unit, a second straightening unit and a second threshold unit to respective inputs of the indication unit, the outputs of the first and second rectifying unit ₄₀ is also connected to separate inputs forming the trigger.

The drawing shows a structural electrical diagram of a device ₄₅ for measuring pulsed electrical signals.

The apparatus comprises an input transducer 1, a pulse amplifier 2 which forms a trigger 3, a block Indie _5Q katsii 4, the inertial element 5 differentiating unit 6, a phase inverter 7, straightening blocks 8 and 9, the threshold devices 10 and 11, an adder 12.

When measuring, the input converter is brought to the conductor with the measuring device ORDER 2330/1 Branch of the PPP

Circulation 635 Subscribed

Patent * ', r ^ Uzhhorod, Projectnaya St., 4 th signal. The corresponding pulse signals appear at its output. They are converted by the inertial element 5 into pulses with a longer duration of the fronts, which, in turn, by the differentiation unit 6 are converted into short pulses. The amplitudes of the differentiated pulses are proportional to the full range of the controlled pulses and practically do not depend on the change in their frequency, duty cycle or duration, if the differentiation constant is chosen less than the time constant of the inertial element. If the time constant of the inertial element is chosen to be longer than the duration of the edges and sections of the pulses, then their change also has little effect on the amplitude of the obtained normalized pulses.

For further measurement and conversion of normalized signals, the phase inverter 7 extracts an antiphase sequence of pulses from them and pulse sequences corresponding to positive and negative normalized pulses are formed at the outputs of rectification units 8 and 9. These sequences of pulses arrive at the threshold blocks 10 and 11, which, when certain thresholds are exceeded (include the indication unit 4. In this case, both the amplitude and phase of the measured signal are recorded, including single pulse drops, since one threshold block reacts only to one phase, that is, for positive signal drops, another threshold block - only for negative signal drops. Simultaneously forming trigger 3 restores the shape of rectangular pulses that repeat the shape of the measured s signals. This can improve the accuracy of visual control pulses changing their porosity, duration and repetition rate. In the proposed device simultaneously achieves a high accuracy of the measured pulse amplitude display in a wide range of frequency variation, pulse duration, duty cycle and duration fronts.

Claims (1)

DEVICE FOR MEASURING PULSE ELECTRICAL SIGNALS, containing an input converter and a pulse amplifier in series, an indication unit and forming a trigger, characterized in that, in order to increase measurement accuracy, an inertial element, a differentiation unit, a phase inverter with direct and inverse outputs are inserted into it, two rectification units and two threshold blocks, and the output of the pulse amplifier is connected through a series-connected inertial element and a differentiation unit to the phase input inverters, the direct and inverse outputs of which are connected through the first rectification block and the first threshold block, the second rectification block and the second threshold block to the corresponding inputs of the display unit, g the outputs of the first and second rectification blocks are also connected to separate inputs of the forming trigger. SU- .. 880224>