Double-wire differential-type magnetostrictive displacement sensor

Abstract

The invention provides a double-wire differential-type magnetostrictive displacement sensor, relates to the technical field of sensors, and solves the technical problem of improving detection accuracy. A framework, a fixed block, signal generation assemblies and a measuring circuit are arranged in a casing of the sensor, wherein the framework and the fixed block are fixed at two ends of the inner wall of the casing respectively. The sensor is characterized in that: two sets of signal generation assemblies are provided; each set of the signal generation assemblies comprises a waveguide wire, an induction coil and a shielding device; one end of each waveguide wire is a near end and the other end of each waveguide wire is a far end; the near ends of two waveguide wires are arranged in two bores of the framework respectively, and the far ends of the two waveguide wires are arranged on the fixed block and connected to each other through a connection lead; the axial lines of the two waveguide wires are parallel to each other; two induction coils are coaxially wound at the peripheries of the two bores on the framework respectively and connected to the measuring circuit after being in series-opposing connection; and two shielding devices are coaxially sleeved at the peripheries of the induction coils of the assemblies respectively. The sensor provided by the invention has high detection accuracy.

Description

technical field [0001] The invention relates to the technology of sensors, in particular to the technology of a double-wire differential magnetostrictive displacement sensor. Background technique [0002] The magnetostrictive displacement sensor is a non-contact measuring device that uses the Wiedeman effect and the Villary effect of the magnetostrictive material to achieve absolute displacement measurement. It has a large range, non-contact, high precision, and fast speed. , high protection level, low cost and other excellent features, are widely used in machinery, construction, machine tools and other industries. [0003] Since the magnetostrictive displacement sensor works on the basis of electromagnetic signals, it will be affected by the electromagnetic interference of the space electromagnetic field during use, which will lead to the introduction of various interference signals (that is, electrical noise) in the induction coil, and the waveguide wire itself is affected...

AI Technical Summary

Problems solved by technology

This method of noise reduction does not improve the signal-to-noise ratio from the source of the signal. When the noise in the signal source has a greater influence, the noise reduction effect is poor, and this method of noise reduction is difficult to adjust due to the complexity of the circuit. The detection accuracy of some magnetostrictive displacement sensors is not high

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