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

Inactive Publication Date: 2007-09-19
BEIHANG UNIV
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  • Abstract
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Problems solved by technology

[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 sensor, small size, low cost, high sensitivity resolution The rate is high, but the measurement range is very small, which cannot meet the needs of large-range applications
The Hall type displacement sensor has simple structure, good dynamic response, high sensitivity resolution, and can be used for non-contact measurement, but it is greatly affected by the medium and temperature, and the nonlinearity is also large; the ind...

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] The invention is a magnetostrictive displacement sensor, which is composed of a central control unit, a signal excitation circuit, a signal processing circuit, a high-speed timing circuit, an RS485 interface circuit, a power supply circuit and a waveguide wire; the RS485 interface circuit realizes the connection with external equipment. Communication and power supply circuits provide the required power for the sensor of the present invention. The information transmission of each part among the present invention is as follows:

[0022] 1. Central processing unit

[0023] In the present invention, the central processing unit adopts a cost-effective single-chip microcomputer (Atmega8L) to realize the control between each module in the magnetostrictive displacement sensor, wherein, the output excitation generation signal f 0 Give the signal to stimulate ...

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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.

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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Application Information

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IPC IPC(8): G01B7/04
Inventor 袁梅孙东亚孙可
Owner BEIHANG UNIV
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