SU409147A1 - DEVICE FOR MEASURING TRANSIENT PROCESSES - Google Patents

Description

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The invention relates to the field of radio measurements and can be used to investigate the dynamic properties of a signal with frequency-modulated modulation of the output signal. In particular, the invention can find application in the study of the dynamic properties of aial-frequency and transducers.

The known devices for measuring transitional processes in non-transducers with a time-pulse modulation of the output signal, state and, not from the input siale, the current key, the unravlei node, the current key, the node of the work, two non-odometer, two delay elements, the code generation unit and a code recorder, do not allow measurement of unscheduled processes in analog-to-frequency converters with non-uniform pulse and second and subsequent steps on the output of the converter, because A variable change in the input signal of the converter is synchronized with the instantaneous nm pulse of the output sequence of the converter.

The purpose of the invention is to descale the study of the dependence of the transition process in the converters in the frequency-pulse module, the value of the output sigal (with a non-uniform impulse output sequence) versus the moment of the input jumper of the converter relative to the base time interval.

This is achieved by the fact that the input of the node of the control unit I is connected to the input of the control unit by the operation of two frequency meters through a switch and.

The drawing shows a block diagram of the proposed device.

The device is composed of node 7 of a given input terminal, connected with the input terminals of the transformer under study; current switch 2, the output of which is connected to the input signal reference node; node 3 of the control current key, one of the outputs of which is connected to the current key 2: and the switch.h 4; node 5 is authorized by the operation of two frequency meters; Frequency meters 6 and 7, operating 1X in the measurement mode) P1 of the number of nanometers at the specified basic time intervals, “Inputs 1 of which are connected and connected to the output terminals of the device under study. and the inputs “Starting each of them with the inputs with the inputs“ Stand of another frequency meter and output of the control unit by the operation of two frequency meters; elements 8 and 9 delayed. the input of each of which is connected to the input of the "Ston Frequently Agents 6 and 7, and the output - with the inputs of the" All-Clear Reset of the Same Frequency; diodes 10, and, positively, the electrodes of which are connected to both .i with both outputs of node 5 control the operation of two frequency meters, and the negative electrodes are connected, are connected to each other and are connected to the input of node 3 of the control by current shred ; Node 12 formating code signals, the inputs of which are connected1H) 1 with the code (; V11Gmi outputs of frequency meters; registrar 13 code and 1formatzpp, whose input is a switch to the codeforming node and) key.

The device works as follows.

Before starting the measurement, the switch 4 is in the open state. Using the // (/ 5) button, the current key driver is set to a position in which the current key 2 connects to the input of the frequency pulse modulation converter under test a larger (smaller) specified value of the input signal. The node for controlling the operation of the frequency meters but alternately sends, with a frequency, inversely proportional to the duration of a given basic time interval, pulses to the Start and Stop inputs of both frequency meters. In addition, each frequency meter alternately measures the number of pulses emitted from the output of the frequency-pulse modulation converter at a given basic time interval.

With the arrival of the imiuls at the input Stop, the frequency meter 6, (7) stops counting imiu.tesov and a code signal appears at its code output corresponding to the measured number of pulses. The impulse arriving at the input of the Stop Frequency Counter 6 (7) is delayed by the delay element 8 (9} and is fed to the Input External reset of its own frequency counter. The duration of the delay time is chosen to be shorter than the duration of the shortest basic standard of time. With the arrival of a pulse at the input The external reset cxeiNia of the frequency meter is reset to the initial state 1E, and the output of the code signal is stopped.

The code signal corresponding to the measured number of pulses from the code and output of each of the tiocTyiine-r frequency converters in y: uM 12 is the generation of code signals. Node 12 converts the code from the decimal to the DVOICHPO-DESYATIC or to the DVO, as well as generates code signals of the required amplitude and duration to send them to the recorder 13.

When the switch of switch 4 is first closed, the pulse from the output of node 5 transfers node 3 to the antistop state, in which the current switch 2 connects the input of the tested converter to a smaller (larger) set value of the input signal. Simultaneously, the output of the node 3 and the entry in the recorder 13 is given a tag signal indicating the temporary location of the jump in the input signal of the test transformer.

PRIOR DIRECTORSHIP and

A device for measuring non-transient processes in frequency-pulse converters, modulation, containing a series-connected current key control node, a current key and an input signal reference node, as well as a node controlled by two frequency meters operating in the number of pulses on a given the basic time interval, two delay elements, the inputs of which are connected to the inputs "Start and" Ston frequency meters, and the outputs - to the inputs "External reset, code generation unit and recorder, from ichayuschees in that in order to permit transient studies depending on the location of the jump points of the input signal relative to the base ireobrazovatel BpeiMeni interval, it is provided with a switch and two diodes through which the input current control node coupled to the key assembly uiravleii two inputs of frequency operation.