Magnetostrictive displacement sensor with high precision and large measuring range

Abstract

The invention relates to a magnetostrictive displacement sensor with high precision and large measuring range, which mainly comprises a waveguide tube and a sensing electronic head. The waveguide tube is used for generating an echoed signal, receiving an exciting pulse signal, simultaneously generating magnetostrictive effect at the position of a magnetic ring, and generating magnetic torsional wave to be returned to an echo acquisition processing analysis system; the waveguide tube is sleeved with the magnetic ring of a permanent magnet; and the directions of a magnetic field generated by the magnetic ring and a magnetic field generated by the waveguide tube are different, and once the magnetic fields are crossed, the magnetic torsional wave is generated. The sensing electronic head comprises five subsystems, namely a control unit, an exciting signal generating system, a communication system, a power supply circuit and the echo acquisition processing analysis system. The magnetostrictive displacement sensor has the advantages that a stable signal exciting and high-speed data acquisition system is designed, and the anti-jamming design of the signals is enhanced; the application range of the sensor is improved; and the measuring precision is quite high, the measuring range is large, the measuring distance is between 25 and 18,000 millimeters, and simultaneously data measured in long distance can be processed through a Zigbee wireless mode.

Description

technical field [0001] The invention mainly relates to a sensor for measuring and controlling displacement, specifically a high-precision and large-range magnetostrictive displacement sensor that can be widely used in displacement measurement in the field of petrochemical industry, precision measurement and control in the field of mechanical automation, and the like. Background technique [0002] In recent years, with the rapid development of science and technology, the requirements for displacement measurement technology have become higher and higher, and new requirements have been put forward for displacement measurement. Not only the displacement sensor is required to have non-contact, large range, high resolution, high Accuracy, high reliability and ease of use, etc., and should also have the ability to adapt to harsh working conditions (dust pollution, vibration and shock) and special environments (thermal power plant boiler drum liquid level, military and high temperatu...

AI Technical Summary

Problems solved by technology

[0005] At present, in terms of high-precision and large-displacement testing, foreign countries have conducted in-depth research on related technologies. Imported products have great advantages in performance and quality, but their prices are too expensive and technically blocked, resulting in a large number of domestic similar products. There is a problem of application difficulty

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