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Signal sensor with magnetic field bias

A technology of signal sensor and magnetic field, applied in the field of signal sensor, can solve the problem of unstable output signal, and achieve the effect of stable signal output, stable output result and simple structure

Inactive Publication Date: 2017-03-15
TIANJIN HENGLIYUANDA INSTR
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  • Abstract
  • Description
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Problems solved by technology

[0005] In view of this, the present invention aims to propose a signal sensor with magnetic field bias to solve the problem of unstable output signal caused by the waveguide leading to the air-core coil being pre-biased by the magnetic field

Method used

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  • Signal sensor with magnetic field bias

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Embodiment Construction

[0016] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0017] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0018] Signal sensors with magnetic field bias, such as figure 1 As shown, it includes a current pulse generating circuit 1, a signal sensor 2, a bias magnetic field device 3 and a waveguide 4, the current pulse generating circuit 1 is connected to the waveguide 4 to form a loop, and the waveguide 4 passes through the center of the signal sensor 2 , the bias magnetic field device 3 is arranged outside one end of the signal sensor 2, and the bias magnetic field device 3 is a magnet.

[0019] The signal sensor 2 is an air-core coil, and the air-core coil induces an electric pulse signal by sensing the micro-twisting signal of the internal waveguide 4, and the electric pulse signal is proc...

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Abstract

The invention provides a signal sensor with magnetic field bias. The signal sensor with magnetic field bias includes a current pulse-generating circuit, a signal sensor, a bias magnetic field apparatus and a waveguide wire, wherein the current pulse-generating circuit is connected with the waveguide wire to form a loop; the waveguide wire passes through the center of the signal sensor; and the bias magnetic field apparatus is arranged at the outside of one end of the signal sensor. The signal sensor with magnetic field bias has the following advantages: by increasing one bias magnetic field apparatus, the signal sensor enables the bias magnetic field generated from a natural magnetic field where the waveguide wire exists to realize fixed polarization so that both the magnetic pole and the field intensity of the magnetic field can be fixed. Therefore, the external magnetic field interference or other cannot influence the magnetic field of the waveguide wire; signal output is stabilized; and the output result is stabilized.

Description

technical field [0001] The invention belongs to the technical field of signal sensors, in particular to a signal sensor with magnetic field bias. Background technique [0002] Under the action of an external magnetic field, the size of ferromagnetic substances is elongated (or shortened), and after the external magnetic field is removed, it returns to its original length. This phenomenon is called magnetostriction (or effect). [0003] The signal sensor often used in the magnetostrictive principle is an air-core coil. The air-core coil induces an electric pulse signal by inducing the micro-twisting signal of the internal waveguide. The electric pulse signal is processed by the subsequent circuit and finally outputs the measurement result. [0004] However, under normal circumstances, air-core coils are all non-ferromagnetic materials and there is no magnetic field, but the waveguide passing through its center is a ferromagnetic material because of an iron-nickel alloy materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/244
CPCG01D5/24471
Inventor 付林耿八一李富强
Owner TIANJIN HENGLIYUANDA INSTR
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