Self-calibration method and system for magnetostriction liquid level sensor

Abstract

The invention discloses a self-calibration method and a system for a magnetostriction liquid level sensor. The method is characterized in that the method comprises the following steps of: generating a current pulse by a pulse processing module, transmitting the current pulse in a waveguide wire, contacting with a magnet in a floater, generating a torsional wave, measuring time T1 that the torsional wave is upwards transmitted to the pulse processing module and time T2 that the torsional wave is downwards transmitted to a terminal of the waveguide wire and is reflected to the pulse processing module by a singlechip; utilizing length H of a feeler lever and the time T1 and the time T2 by the singlechip, according to a formula: V=2H / (T1+T2), and obtaining a real-time velocity of propagationV; utilizing the real-time velocity of propagation V, the length H of the feeler lever and the time T1, according to a formula: h=H-V*T1, and obtaining a current liquid level height h. The invention has the advantages that: temperature influence on the waveguide wire and a crystal oscillator can be automatically removed, more accurate liquid level signals are transmitted in real time to a controlsystem of the magnetostriction liquid level sensor, and accurate measurement of a liquid level can be achieved.

Description

technical field [0001] The invention relates to a magnetostrictive liquid level sensor, in particular to a self-calibration method and system for the magnetostrictive liquid level sensor. Background technique [0002] With the rapid development of science and technology, high technology has been applied in more and more fields. The magnetostrictive liquid level sensor with high technical content is one of them. It uses the Weidmann effect of materials, Villari ( The principle of Viuary) effect and ultrasonic effect realizes high-precision measurement of liquid level. Compared with other types of liquid level sensors, magnetostrictive liquid level sensors have the advantages of high reliability, high precision, good safety, simple installation and easy maintenance, etc., especially in petrochemical and other fields, and it is also Has good explosion-proof performance. [0003] A sensor is a device that converts the measured physical quantity into an easy-to-measure physical...

AI Technical Summary

Problems solved by technology

[0006] Due to the existence of the above reasons, the measurement accuracy of the magnetostrictive liquid level sensor in practical applications is very different from the theoretical value, which limits the application of this type of sensor in some occasions that require high precision.

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