CN206362363U

CN206362363U - Signal transducer with magnetic field bias

Info

Publication number: CN206362363U
Application number: CN201720015995.8U
Authority: CN
Inventors: 付林; 李富强; 耿八; 耿八一
Original assignee: Tianjin Hengli Yuanda Meter Ltd By Share Ltd
Current assignee: Tianjin Hengli Yuanda Meter Ltd By Share Ltd
Priority date: 2017-01-06
Filing date: 2017-01-06
Publication date: 2017-07-28
Anticipated expiration: 2027-01-06

Abstract

The utility model provides a kind of signal transducer with magnetic field bias, including current impulse generation circuit, signal transducer, bias magnetic field device and waveguide wire, the current impulse generation circuit connection waveguide wire constitutes loop, the waveguide wire passes through and sets the bias magnetic field device on the outside of the center of signal transducer, one end of the signal transducer.The utility model has the advantage that：The technical program is by increasing the bias magnetic field fixed polarization that a bias magnetic field device is produced the natural magnetic field that waveguide wire is present by bias magnetic field device, finally so that the field pole and field strength are all to be fixed, so that extraneous magnetic interference or other influences can not have influence on the magnetic field of waveguide wire, signal output is stabilized, finally makes output result stable.

Description

Signal transducer with magnetic field bias

Technical field

The utility model belongs to signal transducer technical field, more particularly, to a kind of sensing with magnetic field bias Device.

Background technology

Ferromagnetic material is under external magnetic field, and its size elongation (or shortening) is removed after external magnetic field, it recovers original again Length, this phenomenon is referred to as magneto-striction phenomenon (or effect).

In magnetostriction principle through commonly used signal transducer be air core coil, air core coil is by sensing inner waveguide Micro- twisting signal of line induces electric impulse signal, processing of circuit final output measurement knot of the electric impulse signal Jing Guo rear class Really.

But, under normal circumstances air core coil is all that nonferromagnetic material does not have a presence in magnetic field, but the heart passes through wherein Waveguide wire, because being iron-nickel alloy material, is ferromagnetic material, therefore it certainly exists magnetic field, and the magnetic field is because pass through air core coil Cause air core coil by magnetic field prebias, but because naturally occurring magnetic field without progress field orientation because causing the magnetic direction For random direction, the effect of prebias is also just random direction, causes the electric impulse signal of air core coil to export and can not fix, increases The complexity during late-class circuit and production and assembly is added, simultaneously as the natural magnetic field is easy to be done by external magnetic field Disturb, cause the magnetic direction deflecting or field strength to change in transport and running, so as to cause final signal to export Change, cause the unstable of output result.

The content of the invention

In view of this, the utility model is directed to a kind of signal transducer with magnetic field bias, to solve due to waveguide The problem of line causes air core coil the output signal caused by is unstable by magnetic field prebias.

To reach above-mentioned purpose, what the technical solution of the utility model was realized in：

Signal transducer with magnetic field bias, including current impulse generation circuit, signal transducer, bias magnetic field device and Waveguide wire, the current impulse generation circuit connection waveguide wire constitutes loop, and the waveguide wire passes through the center of signal transducer, The bias magnetic field device is set on the outside of one end of the signal transducer.

Further, the bias magnetic field device is magnet.

Relative to prior art, the utility model has the advantage that：

(1) natural magnetic field that the technical program has waveguide wire by increasing a bias magnetic field device is by bias magnetic field The bias magnetic field fixed polarization that device is produced, finally so that the field pole and field strength are all fixed, so that extraneous Magnetic interference or other influences can not have influence on the magnetic field of waveguide wire, stabilize signal output, finally make output result stable；

(2) present apparatus is simple in construction, easily realizes.

Brief description of the drawings

Constitute a part of accompanying drawing of the present utility model to be used for providing further understanding to of the present utility model, this practicality is new The schematic description and description of type is used to explain the utility model, does not constitute to improper restriction of the present utility model. In accompanying drawing：

Fig. 1 is the structure principle chart of the signal transducer with magnetic field bias described in the utility model embodiment.

Description of reference numerals：

1- current impulse generation circuits；2- signal transducers；3- bias magnetic field devices；4 waveguide wires.

Embodiment

It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the utility model can To be mutually combined.

Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Signal transducer with magnetic field bias, as shown in figure 1, including current impulse generation circuit 1, signal transducer 2, partially Magnetic field device 3 and waveguide wire 4 are put, the connection of current impulse generation circuit 1 waveguide wire 4 constitutes loop, and the waveguide wire 4 is passed through The bias magnetic field device 3, the bias magnetic field are set on the outside of the center of signal transducer 2, one end of the signal transducer 2 Device 3 is magnet.

The signal transducer 2 is air core coil, and air core coil is felt by sensing micro- twisting signal of internal wave wire 4 Electric impulse signal should be gone out, processing of circuit final output measurement result of the electric impulse signal Jing Guo rear class.During this, due to ripple The magnetic field that wire 4 is produced causes air core coil to be offset by the effect of magnetic field prebias by bias magnetic field device.

The natural magnetic field that waveguide wire 4 is present is produced by bias magnetic field device 3 by increasing a bias magnetic field device 3 Bias magnetic field fixed polarization, finally causes the field pole and field strength all to be fixed so that extraneous magnetic interference or Other influences can not have influence on the magnetic field of waveguide wire 4, stabilize signal output, finally make output result stable.

Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model Protection domain within.

Claims

1. the signal transducer with magnetic field bias, it is characterised in that：Including current impulse generation circuit, signal transducer, biasing Magnetic field device and waveguide wire, the current impulse generation circuit connection waveguide wire constitute loop, and the waveguide wire is passed through signal The bias magnetic field device is set on the outside of the center of sensor, one end of the signal transducer.

2. the signal transducer according to claim 1 with magnetic field bias, it is characterised in that：The bias magnetic field device is Magnet.