SU1465758A1 - Method of checking serviceability of acoustic devices - Google Patents

Abstract

The invention relates to the field of acoustic methods for measuring distances and properties of a medium and can be used to monitor the performance of acoustic devices, such as liquid and gaseous medium analyzers and range finders, operating in pulsed mode. The purpose of the invention is to reduce the monitoring time correct. The invention relates to acoustic methods for measuring distances and medium properties and can be used to monitor the performance of acoustic devices, such as liquid and gaseous analyzers and range finders, operating in pulsed mode. The purpose of the invention is to reduce the time for monitoring the health of two channels: x pulsed acoustic, the orality of two-channel pulsed acoustic devices due to the distribution of the probing pulses while monitoring the health of the device through its channels. In the proposed method, both channels of the device under test are filled with the same test medium, the probe pulses are supplied to the test medium and in each control cycle, the time intervals between the received signal corresponding to the first probe pulse and the second probe pulse shifted for a given length of time, and between the received signal corresponding to it and the third probe pulse following it. In each control cycle, a probe pulse shifted by a stable period of time is fed to the test medium of the first channel, and the remaining probe pulses are fed to the sound medium of the second channel. According to the results of the comparison of the measured time intervals, the health of the device is judged. 1 Il. (With solids due to the distribution of probing pulses in monitoring the operability of a device through its channels. The drawing shows diagrams of probing and received signals of an acoustic device when it is checked by the proposed method. impulses and O) s: 4: O5 SP SL 00

Description

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compare in each control cycle the time intervals between the received sig

The first probe pulse, followed by the second probe pulse, should be shifted by a predetermined length of time, and between the received incoming signal and the third probe pulse following it, and judging by the comparison results, the device is in good condition. In this case, both channels of the tested ycTipottcTsa are filled with the same test medium. A probe pulse shifted by a predetermined time is fed into the test medium of the first channel of the device in each control cycle, and the remaining probe pulses are fed into the test medium of the second channel.

Example. For the implementation of the method, both channels of the device under test are filled with the same test medium and the probe pulses are fed into these media (see drawing, a, b) In this case, the second probe pulse (b, pulse k) is shifted by a given time interval At, (relative to the first probe pulse that preceded it (a, pulse I) and the third probe pulse following them (a, pulse L). Then the signal (c) passed to the measurement circuit of the first channel, and sc the measurements of the second channel are given to him by the past of his test medium

signal (g).

The length of time t ,, is concluded between the signal corresponding to the first probe pulse and the second probe pulse. Then, the time interval, t ,, is enclosed between the signal corresponding to the second probe of the glossy pulse and the third probe pulse.

The health of the device is judged by comparing the measured time intervals tj and t by subtracting the second from the first. Due to the shift of the second probe pulse relative to the first and the third by a stable period of time, ut is the segment t, greater than the segment tj, by an amount 2At.

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The value is 2eit. choose the appropriate specific control value of the output signal of the device. Therefore, the extent of its deviation from the control value is judged on the degree of health of the device.

Claims (1)

In the event of a device failure, the flow of the pulse to the measurement circuit in both channels, the media under study, is stopped and the auxiliary pulses tp, n (v, d) shifted from the preceding probe pulses by time t, to its inputs. The auxiliary pulses are fed one to each channel of one cycle of monitoring the operability of the measurement circuit. J Then the time t is measured, and tj, between the auxiliary pulse and the probe pulse following it. The health of the measurement circuit is judged by comparing the measured time intervals t, and t 25 by subtracting the second from the first. The application of the proposed method in comparison with the prototype allows reducing the time for monitoring the health of two-channel pulsed acoustic devices during operation by reducing the total number of probe pulses. Invention Formula The method of monitoring the operability of acoustic devices, which consists in emitting probe pulses to the medium under investigation, compares in each control cycle the time intervals between the received signal corresponding to the first probe pulse and the second probe pulse following it, shifted by a predetermined length of time, and between the corresponding direct signal and the third probe pulse following it, and comparing the results, the device is in good condition, characterized in that, in order to reduce During the monitoring of the operability of two-channel pulsed acoustic devices, both channels are filled with the same and the studied medium, in each cycle a probe pulse, shifted by a predetermined interval of time, is fed into the subsequent medium of the first channel, and the remaining probe pulses are the studied environment of the second channel. thirty 50 U n H