SU405111A1 - DEVICE FOR CALCULATING THE AVERAGE VALUE OF THE SIGNAL - Google Patents

Description

one

The invention relates to the field of automation and can be used to smooth the additive signal mixture with noise.

Devices for calculating the average value of a signal are known, comprising nick detectors, an adder, a reference voltage source and keys.

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

This is achieved by adding an extremum indicator and a delay element to the device, with the extremum indicator input connected to the inputs of the nick detectors, and the output through the delay element to the keys.

The block diagram of the device shown in the drawing.

The device contains peak detectors 1, keys 2, reference voltage source 3, adder 4, output key 5, extremum indicator 6 and delay element 7

The device works as follows.

The input signal arrives at the input of the Nikov detectors 1 and the pulse indicator 6 of the extremum, which records, for example, the maximum values of the signal. Peak detectors select and store the maximum and minimum values of the signal. Adder 4 calculates their half sum. However, the combination of elements 1, 4 allows the signal parameters to be isolated and processed only in the first half-period of oscillation. In order for the device to continue to function, it is necessary to unload the storage elements of the peak detectors.

This problem is solved by the extremum indicator. Using switches 2, it connects the storage elements of the peak detectors to the source of the reference voltage, and the connection is made at the end of each half-period of the signal change some time after the occurrence of the maximum value.

The magnitude of the reference voltage in absolute value exceeds the possible value of the maximum and minimum signal. The delay time is determined by element 7.

The advantage of the proposed device is that the accuracy of operation is independent of the frequency of the input signal, since the reloading of the storage elements of peak detectors is carried out not depending on time, but as a function of the signal phase, which ensures frequency invariance.

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Subject invention

A device for calculating the average value of a signal, containing two peak detectors, whose inputs are interconnected, an adder, whose inputs are connected to the outputs of peak detectors, and an output to an output-, НЫ1М key, and a reference voltage source, the outputs of which are connected to Peak detectors, characterized in that, in order to improve the accuracy of operation,

additionally contains an extremum indicator and a delay element, with the extremum indicator input connected to the peak detector inputs, and the output through the delay element connected to the keys. .

Output