SU1374050A1 - Device for fixing and measuring extremums and for separating investigated characteristics - Google Patents

Abstract

The invention relates to a technique for measuring extremely or complex polyharmonic processes represented as electrical quantities. The purpose of the invention is to increase the reliability of the device. The temporal realization of the voltage is investigated through the low-pass filter 8 to the differentiating link 9. The derivative of the process studied with respect to time from the output of the latter goes to a generator of 10 rectangular pulses, forming short pulses at the time instant corresponding to zero values of the derivative. These pulses go to the first input of the device and to the first input of the gating element 2, which pass the corresponding instant of the process under study to the second input of the gating element 2 to the output. These instantaneous process values, which are its extremes, are output from the gate element 2 to the first input of the valve 1 and to the second input of the memory element 4, as well as to the input S (/)

Description

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difference circuit 7, to the second input of which, from the output of memory element 4, the previous extremes of the function of the process under study are fed. From output 1, impulses arrive, the counting of which gives the total number of extrema, and cp137405

The measurement of the output from the device allows determining the time distribution of extremes, minimums and sweeps, and other desired characteristics of the function of the process under study. 1 il.

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This invention relates to a technique for measuring random or complex polyharmonic processes represented as electrical quantities.

The purpose of the invention is to increase the reliability of the device.

The drawing is a structural diagram of a device for fixing, measuring extremums and highlighting the characteristics under study.

The device for fixing, measuring extremes and analyzing characteristics includes a valve 1, a gate element 2, the first input of which is the first output of the device, the output is connected to the first input of the valve, the output of the last is the second output of the device, the first difference circuit 3, the first 4, the second 5 and third 6 memory elements, wherein the first output of the valve 1 is the third output of the device, the outputs of the second 5 and the third 6 memory elements are connected to the first and second inputs of the difference circuit 3, respectively the course of which is the fourth output of the device, the second difference circuit 7 and the series-connected low-pass filter 8, a differentiating link 9, a generator of 10 rectangular pulses, the output of which is connected to the first input of the strobe element 2, the second input of which is connected to the filter input 8 is the first input of the device, and the output is connected to the second input of the first memory element 4 and the first input of the second difference circuit 7, the second input of which is connected to the output of the first memory element 4, and the output from the second input circuit. ode valve 1, while

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The first inputs of the memory elements 4-6 are the second output of the device.

The device works as follows.

The temporal realization of the voltage S (t) is investigated through a low-pass filter 8, in which unwanted high-frequency distortions of the process S (t) are filtered out, to differentiating link 9. The derivative of the process being studied with respect to time dS / dt from the output of differentiating link 9 goes to generator 10 rectangular pulses, forming short pulses at a point in time, corresponding to zero values of the derivative dS / dt, i.e. extrema of the function of the process under study. These pulses from the code of the generator of 10 rectangular pulses go to the first input of the device (for counting the total number of extremes) and to the first input (control) of the gating element 2, which at the moments of arrival of the pulses from the generator of 10 rectangular pulses passes the corresponding instant of the investigated process S (t) arriving at the second input (signal) of gating element 2. These instantaneous values of the process S (t), which are its extremes S: (local maxima and minima), are output from the gate element 2 to the first input (signal) valve 1 and to the second input of the first memory element 4, as well as to the first the input of the second difference circuit 7, to the second input of which, from the output of the first memory element 4, the previous extrema Sj., the functions of the process under study, arrive.

In the second difference scheme 7, the difference d is calculated; between the times observed at the moment local extremum 5: and previous

common local extremism S; , of the process under study, which is fed to the second input (control) of valve 1. If the calculated raability has a positive value (), then the extremum S; is a maximum and the valve 1 passes it to the second memory element 5 and to the third output of the device. If the difference is negative () ,. then the extremum of S. is the minimum of S; (, ds and the valve 1 passes it to the third memory element and to the second output of the device. When the subsequent extremums S (j, 5 "d and .. ,,, respectively, the values of the extremes Sj WCIKC and Sj jviHH are successively fed to difference scheme 3, where the difference S j max -S j ,,, is calculated, i.e., the local range of functions of the process under study, and the resulting value is fed to the fourth device code

Thus, from output 1, pulses come in, counting which gives the total number of extremes, and comparing the values from the second, third and fourth outputs of the device with the thresholds after simple logical operations allows determining the time distribution of the extremes in general, the maxima of the minima and ranges between the extremes of the specified levels and other required characteristics of the process function.

At the end of the process under study S {t) or after a predetermined interval of time allotted for analysis, a pulse command Reset is sent to the second input of the device, which embraces all three memory elements 4-6

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The proposed technical solution ensures reliable operation of the device when analyzing radar signals when voltage drops

Claims (1)

Invention Formula A device for fixing, measuring extremes and isolating the characteristics under study, containing the first and second memory elements sequentially connected to the gating element, valve, the third memory element and a difference circuit, the second input of the gating element being the first input of the device, the first inputs of the first, second and third elements the memory is interconnected and is the second input of the device, the first input of the gating element is the first output of the device, the first output of the valve is the second output of the device, the second output of the valve is the third output of the device and is connected to the second input of the second memory element. ti, the output of which is connected to the second input of the difference circuit, the output of which is the fourth output of the device, characterized by the fact that, in order to increase the reliability of the device, a second difference scheme is introduced into it, as well as a series-connected low-pass filter, a differentiating element, a generator of rectangular pulses, the output of which is connected to the first input the gate element, the second input of which is connected to the input of the low-pass filter, and the output is connected to the second input of the first memory element and the first input of the second differential circuit, the second input of which is connected to the output of the first memory element, and the output from the second input vents