Multi-factor influence-improved ultrasonic hydraulic measurement method and system

Abstract

The invention discloses a multi-factor influence-improved ultrasonic hydraulic measurement method and system. According to the hydraulic measurement system, the pressure value of liquid can be obtained through measuring the transmission time difference of ultrasonic waves in hydraulic oil before and after the hydraulic oil is under pressure; the influences of pipe diameter, installation deviation and temperature on measurement can be improved respectively through adopting a transverse wave oblique incidence probe, an automatic gain control circuit and a BP neural network with a real-time temperature compensation function; and the hydraulic measurement system includes a processing module, an ultrasonic transmitting module, an ultrasonic echo processing module, a time measurement module and a temperature measurement module. The hydraulic measurement method comprises the steps of ultrasonic transmitting control, ultrasonic echo processing, automatic gain adjustment, time measurement, temperature measurement, BP neural network-based data processing and so on. With the multi-factor influence-improved ultrasonic hydraulic measurement method and system of the invention adopted, the influence of various factors on hydraulic measurement can be improved. The multi-factor influence-improved ultrasonic hydraulic measurement method and system have the advantages of high reliability, wide use range and excellent measurement accuracy.

Description

Technical field: [0001] The invention belongs to the technical field of liquid pressure measurement, and relates to a non-interventional liquid pressure measurement method based on ultrasonic technology, in particular to an ultrasonic hydraulic measurement method and a system thereof which can improve the influence of multiple factors. Background technique: [0002] With the application of hydraulic systems more and more widely, the real-time monitoring of its operating status has received more and more attention. Fluid pressure is one of the basic parameters reflecting the operating state and changing law of the hydraulic system. The measurement of the pressure value is the basic requirement for the state monitoring and fault diagnosis of the hydraulic system. [0003] Although the traditional hydraulic measurement methods are in various forms, they are all interventional. The measurement is completed by drilling holes in the pipeline to be tested and installing pressure ga...

AI Technical Summary

Problems solved by technology

Ultrasound has a fast propagation speed. When the pipe diameter is small, as the ultrasonic propagation distance decreases, the ultrasonic echo is easy to overlap with the initial wave, resulting in the failure of normal measurement.

[0009] 3. The installation deviation of the ultrasonic probe

Temperature will affect the propagation characteristics of ultrasonic waves in liquids, and the speed of ultrasonic waves will change significantly, which will make the measurement more difficult

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