Magnetostrictive displacement sensor

A displacement sensor and magnetostrictive technology, applied in the field of displacement sensors, can solve the problems of narrow linear range, low differential inductive frequency response, large temperature influence, etc., to improve anti-interference and stability, reduce Power consumption and cost, the effect of enhancing anti-jamming capability
CN101038151AInactive Publication Date: 2007-09-19BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2007-09-19
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The present invention discloses a magnetoconstriction type displacement sensor which measures the displacement by using a time-difference displacement measuring method. A torsional wave is generated by crossing two different magnetic field and then the transmitting time of the torsional wave is computed, thus the displacement measuring can be performed indirectly and accurately. The magnetoconstriction type displacement sensor consists of a center control unit, a drive signal generator, a signal processing circuit, a high-speed timing circuit, a RS485 interface circuit, a power supply circuit and the wave guide filament.
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Description

technical field

[0001] The invention relates to a displacement sensor, in particular to a high-precision displacement sensor based on magnetostrictive technology. Background technique

[0002] There are many displacement measurement methods, mainly including mechanical measurement, pneumatic measurement, electromagnetic measurement, and optical measurement. Among them, the electromagnetic measurement method can directly output electrical signals, which is convenient for automatic detection and control. Electromagnetic measurement methods can be divided into potentiometer type, Hall type, strain type, inductive type, magnetic grid type, eddy current type, capacitive type, magnetostrictive type and other forms.

[0003] Potentiometer type displacement sensor has simple structure and circuit, low cost, but the mechanical structure is not firm; sliding wire type displacement sensor has a solid measurement structure, but poor resolution and large noise; strain type displacement ...

Claims

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