SU483619A1 - Method of measuring the ratio of two pulse signals - Google Patents

Description

one

The invention relates to a pulse measurement technique and can be used in the ultrasonic testing of materials.

A known method of measuring the ratio of two pulse signals of the transducers is that the memory cells memorize the level of the signals and then compare them with the signal of the sweep type generator and the resultant duration, its signal judges the measurement results.

However, the accuracy of measurement by a known method is not sufficient, since the charge-discharge mode of the filling containers switched at specified time intervals is used.

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

For this, the generator signal is an exponentially falling voltage with an initial level exceeding the levels of the measured signals, which is compared in series with the larger of the measured signals and then with the smaller one.

The drawing shows a flowchart that implements the proposed method.

The block diagram contains memory cells 1, memory levels of measured signals Uj and U2, a sweep type generator 2 with an output exponentially descending load, comparison circuits 3, the outputs of which are connected to the trigger input 4.

At moments of instantaneous values of the exponentially decaying voltage with

The levels of the measured signals trigger 4 moves from one state to another, as a result of which a signal appears at its output, the duration of which determines the divergence of the pulse signals Ui and Uj, connected by a logarithmic dependence.

Subject invention

The method of measuring the ratio of two pulse signals of flaw detector transducers, which means that the memory cells memorize the signal levels, and then compare them with a sweep type generator signal and, by the duration of the resultant signal, measure the results, in order to improve the accuracy measurements, the signal of the generator is used to expose the 1natally decreasing voltage with an initial level exceeding the levels of the intended signals, which are compared successively them from the measured sngnalov and then smaller.