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Ferrite magnetostrictive displacement sensor

A displacement sensor, ferrite magnetic technology, applied in the field of sensors, can solve problems such as weak anti-interference ability, low sensor measurement accuracy, complex sensor structure, etc., to improve measurement accuracy, improve stability, shield noise signals and electromagnetic interference Effect

Inactive Publication Date: 2018-10-19
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the generated echo signal is a weak signal, it is difficult to pick up the weak signal, resulting in low measurement accuracy of the sensor
At the same time, the existing sensors are relatively complex in structure, there are many deficiencies, and the anti-interference ability is weak

Method used

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  • Ferrite magnetostrictive displacement sensor
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Embodiment Construction

[0012] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0013] Such as figure 1 and figure 2 As shown, a ferrite magnetostrictive displacement sensor includes a circuit processing unit 1 (including a microprocessor), a receiving coil 2, a waveguide wire 3, a casing 4, a gap 5, a metal aluminum sleeve 6, and a moving magnetic ring 7 and damper 8. The circuit processing unit 1 is fixed in the closed device and covered with a shield. The receiving coil 2 is placed on one end of the waveguide wire 3 and connected to the circuit processing unit 1. The waveguide wire 3 is placed in a metal aluminum sleeve 6, the metal aluminum sleeve 6 is connected to the ground wire, the outer layer of the waveguide wire 3 is provided with a plastic shell 4, and there is a gap 5 in the middle, the moving magnetic ring ...

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Abstract

The invention relates to a ferrite magnetostrictive displacement sensor device comprising a sensor head, a measuring rod and a moving magnetic ring assembly. The sensor head is provided with a microprocessor, a circuit processing module and a coil. The microprocessor and the circuit processing module are mounted in a closed shielding box. The circuit processing module is used for generating an excitation pulse and conditioning an echo signal. The coil is placed at one end of a waveguide wire for receiving the echo signal. The other end of the waveguide wire is provided with a damper for absorbing a torsional wave. The measuring rod includes the waveguide wire, an aluminum sleeve and a casing. The aluminum sleeve tightly wraps the waveguide wire and is disposed inside the casing. The casingis sleeved with a magnetic ring movable left and right on the casing and used for interacting with the waveguide wire. The waveguide wire uses ferrite as a magnetostrictive material. The ferrite magnetostrictive displacement sensor is greatly improved in operation stability, reduced in external interference, improved in the measurement accuracy, and reduced in cost.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a ferrite magnetostrictive displacement sensor. Background technique [0002] The magnetostrictive displacement sensor is a new type of displacement sensor that uses the principle of magnetostriction to measure displacement. With the increasing automation of ships, the computer monitoring system has been widely used on ships. The application of the ship's microcomputer automatic control system requires the wide use of various sensors, and requires the connection between the sensor and the computer to be convenient, the data transmission speed to be fast, and the precision to be high. The principle of magnetostriction was discovered in 1842 by the scientist James Prescott Joule. James Prescott Joule found that when a ferromagnet is magnetized by an external magnetic field, its magnetic domain structure will change, and the atomic spacing of the crystal will change accordingly, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02
CPCG01B7/02
Inventor 谢代梁陈国庆刘铁军徐志鹏徐雅
Owner CHINA JILIANG UNIV
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