CN108680092A - A kind of ferrite magnetostrictive displacement sensor - Google Patents
A kind of ferrite magnetostrictive displacement sensor Download PDFInfo
- Publication number
- CN108680092A CN108680092A CN201810389773.1A CN201810389773A CN108680092A CN 108680092 A CN108680092 A CN 108680092A CN 201810389773 A CN201810389773 A CN 201810389773A CN 108680092 A CN108680092 A CN 108680092A
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- waveguide filament
- shell
- processing
- ferrite
- circuit module
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The present invention relates to a kind of devices of ferrite magnetostrictive displacement sensor.The present invention includes sensor head, measuring rod and mobile magnetic ring component.The sensor head is equipped with microprocessor, processing of circuit module and coil, the microprocessor and processing of circuit module are mounted in closed shielded box, the processing of circuit module is used to generate the conditioning of driving pulse and echo-signal, the coil is positioned over waveguide filament one end, for receives echo-signal, the waveguide filament other end is equipped with the damper for absorbing torsional wave；The measuring rod includes waveguide filament, metal aluminum casing and shell, metal aluminum casing tight waveguide filament, and as in shell；It is cased with magnet ring on shell, can move left and right on the shell, for interacting with waveguide filament, for the waveguide filament medium using ferrite as magnetostriction materials, the present invention substantially increases the stability of working sensor, reduces extraneous interference, measurement accuracy is improved, cost has been saved.
Description
Technical field
The present invention relates to sensor technical field, more particularly to a kind of ferrite magnetostrictive displacement sensor.
Background technology
Magnetostrictive displacement sensor is to utilize magnetostriction principle, carries out the New Displacement Transducer of displacement measurement.With
The increasingly raising of shipboard automation degree, Computerized monitor system obtains increasingly extensive utilization on ship.Ship microcomputer is certainly
The utilization of control system, it is desirable that widely use various sensors, and require easy to connect, the data biography of sensor and computer
Defeated speed is fast, precision is high.Magnetostriction principle was found in 1842 by scientist James Prescott Joule.
James Prescott Joule have found that, when ferromagnet is magnetized by external magnetic field, domain structure will change,
The atomic distance of crystal changes correspondingly, and causes ferromagnetic volume, shape to change, especially ferromagnetic substance is in magnetic field side
Upward length changes, and this magnetic effect is just referred to as magnetostriction.
It can surveyed along sensor length direction position magnet free to slide currently, magnetostrictive displacement sensor has
High current excitation pulse signal is loaded during amount first on waveguide filament, which generates annular magnetic around waveguide filament
Field is propagated along waveguide filament, and toroidal magnetic field generates interaction with position magnet magnetic field at position magnet, generates instantaneous torsional wave,
Along waveguide filament toward travel back, it is detected test coil and receives.By measuring driving pulse to the time interval between receives echo-signal
Carry out the correspondence between settling time and displacement.Since the echo-signal of generation belongs to small-signal, for small-signal
Pickup is more difficult, causes the measurement accuracy of sensor relatively low.Meanwhile existing sensor is complex in structure, exists
Many shortcomings, anti-interference ability is weak.
Invention content
To solve the above-mentioned problems, the present invention provides one kind being based on ferritic magnetostrictive displacement sensor, has
The advantages that system detectio precision is high, reliability is high, at low cost, detection efficiency is high, high degree of automation.
To achieve the goals above, the present invention is realized using following technical scheme：
The present invention includes sensor head, measuring rod and mobile magnetic ring component.The sensor head be equipped with microprocessor,
Processing of circuit module and coil, the microprocessor and processing of circuit module are mounted in closed shielded box, at the circuit
Reason module is used to generate the conditioning of driving pulse and echo-signal, and the coil is positioned over waveguide filament one end, for receiving echo
Signal, the waveguide filament other end are equipped with the damper for absorbing torsional wave；The measuring rod includes waveguide filament, metal aluminum casing
And shell, metal aluminum casing tight waveguide filament, and as in shell；Mobile magnet ring is cased on shell, it can be left on the shell
It moves right, for interacting with waveguide filament, the waveguide filament medium is using ferrite as magnetostriction materials.
Furtherly, the metal aluminum casing ground connection.
Furtherly, there are gaps between the waveguide filament and shell.
Beneficial effects of the present invention are：Magnetic loop interaction as magnetostriction materials and is moved using Ferrite Material,
Stronger torsional wave signal can be generated, the acquisition of echo-signal is conducive to；In addition, waveguide filament outer layer is equipped with metal aluminum casing simultaneously
Ground connection can effectively shield noise signal and electromagnetic interference；It is separated with a fixed gap between waveguide filament and shell, reduces ambient temperature
The influence that press belt comes.Compared with prior art, the present invention substantially increases the stability of working sensor, improves simultaneously
Measurement accuracy.
Description of the drawings
Fig. 1 is a kind of ferrite magnetostrictive displacement sensor map；
Fig. 2 is measuring rod partial enlarged view.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
As depicted in figs. 1 and 2, a kind of ferrite magnetostrictive displacement sensor, including processing of circuit unit 1 (contain micro- place
Manage device), receiving coil 2, waveguide filament 3, shell 4, gap 5, metal aluminum casing 6, mobile magnet ring 7 and damper 8.At the circuit
Reason unit 1 is fixed in locking device, and is cased with shielding device, and the receiving coil 2 is positioned over one end of waveguide filament 3 and and circuit
Processing unit 1 is connected, and the waveguide filament 3 is placed in inside metal aluminum casing 6, and the metal aluminum casing 6 connects ground wire, the wave
3 outer layer of seal wire is equipped with plastic shell 4, and centre is separated with gap 5, and the mobile magnet ring 7 is placed on shell 4, and the damper 8 is placed in
The other end of waveguide filament, for absorbing torsional wave.
The operation principle of the magnetostrictive displacement sensor is as follows：
Driving pulse is generated in processing of circuit unit and acts on waveguide filament, and toroidal magnetic field is formed on waveguide filament along waveguide
Silk is propagated, and the magnetic field interaction on fixed magnetic field and waveguide filament that mobile magnet ring generates generates instantaneous torsion wave direction both ends and passes
It broadcasts, one end is received coil reception wherein, and the other end is damped device absorption.Processing of circuit unit is by measuring driving pulse production
It gives birth to the time difference between receiving coil receives echo-signal and determines displacement.
The present invention, as magnetostriction materials, is had higher magnetostriction coefficient, can made with magnet ring using ferrite
With the higher torsional wave signal of intensity is generated, it is conducive to the pickup of echo-signal.There are various noises when work, as spatial electromagnetic is dry
The noise brought, system power supply noise etc. are disturbed, the present invention realizes isolation Noise Reduction using the method that metal aluminum casing is grounded,
And magnet ring is placed on shell and waveguide filament is there are certain interval, while ensureing that two magnetic field interactions are abundant, reduce external
The influence of factor.
Compared with prior art, the present invention substantially increases the stability of working sensor, at the same it is less it is external because
The measurement error that element is brought, improves measurement accuracy.
Claims (3)
1. a kind of ferrite magnetostrictive displacement sensor, including sensor head, measuring rod and mobile magnetic ring component, feature
It is：The sensor head is equipped with microprocessor, processing of circuit module and coil, the microprocessor and processing of circuit module
In closed shielded box, the processing of circuit module is used to generate the conditioning of driving pulse and echo-signal, the line
Circle is positioned over waveguide filament one end, is used for receives echo-signal, and the waveguide filament other end is equipped with the damper for absorbing torsional wave；Institute
It includes waveguide filament, metal aluminum casing and shell to state measuring rod, metal aluminum casing tight waveguide filament, and as in shell；
The mobile magnet ring is cased on shell, the mobile magnet ring can move left and right on the shell, for interacting with waveguide filament, institute
Waveguide filament medium is stated using ferrite as magnetostriction materials.
2. a kind of ferrite magnetostrictive displacement sensor according to claim 1, it is characterised in that：The metal aluminium set
Pipe is grounded.
3. a kind of ferrite magnetostrictive displacement sensor according to claim 1 or 2, it is characterised in that：The waveguide
There are gaps between silk and shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810389773.1A CN108680092A (en) | 2018-04-27 | 2018-04-27 | A kind of ferrite magnetostrictive displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810389773.1A CN108680092A (en) | 2018-04-27 | 2018-04-27 | A kind of ferrite magnetostrictive displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108680092A true CN108680092A (en) | 2018-10-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810389773.1A Pending CN108680092A (en) | 2018-04-27 | 2018-04-27 | A kind of ferrite magnetostrictive displacement sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN108680092A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870389A (en) * | 2019-04-12 | 2019-06-11 | 长春工程学院 | Based on magnetostrictive displacement sensor irrigation water coefficient of viscosity detection device and method |
| CN111396495A (en) * | 2020-03-25 | 2020-07-10 | 桂林电子科技大学 | Shock absorber and commercial car suspension |
| CN112729479A (en) * | 2020-12-23 | 2021-04-30 | 北京斯克维思仪表有限公司 | Coil type magnetostrictive sensor |
| CN113432521A (en) * | 2021-06-11 | 2021-09-24 | 北京奥特美克科技股份有限公司 | High-precision displacement sensor |
| CN114264221A (en) * | 2021-12-24 | 2022-04-01 | 南昌工程学院 | Magnetostrictive displacement sensor for precise control |
| WO2022252227A1 (en) * | 2021-06-04 | 2022-12-08 | Abb Schweiz Ag | Sensing assembly for use in piezoelectric liquid level sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797007A (en) * | 2004-12-21 | 2006-07-05 | 上海电动工具研究所 | Method for shielding clip style sensor |
| DE102007031787A1 (en) * | 2007-07-07 | 2009-01-08 | Stefan Hubrich | Magnetostrictive position sensor for monitoring e.g. piston stroke in hydraulic system, has electromagnet designed such that electromagnet operates on magneto-resistive measurement system in active condition |
| CN206523126U (en) * | 2017-02-16 | 2017-09-26 | 江门市润宇传感器科技有限公司 | Drawing-Core magnetostrictive displacement sensor |
| CN207081405U (en) * | 2017-08-31 | 2018-03-09 | 周勇 | A kind of high-precision magneto strictive sensor |
-
2018
- 2018-04-27 CN CN201810389773.1A patent/CN108680092A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797007A (en) * | 2004-12-21 | 2006-07-05 | 上海电动工具研究所 | Method for shielding clip style sensor |
| DE102007031787A1 (en) * | 2007-07-07 | 2009-01-08 | Stefan Hubrich | Magnetostrictive position sensor for monitoring e.g. piston stroke in hydraulic system, has electromagnet designed such that electromagnet operates on magneto-resistive measurement system in active condition |
| CN206523126U (en) * | 2017-02-16 | 2017-09-26 | 江门市润宇传感器科技有限公司 | Drawing-Core magnetostrictive displacement sensor |
| CN207081405U (en) * | 2017-08-31 | 2018-03-09 | 周勇 | A kind of high-precision magneto strictive sensor |
Non-Patent Citations (1)
| Title |
|---|
| 周征等: "《传感器与检测技术》", 30 September 2017, 西安电子科技大学出版社 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870389A (en) * | 2019-04-12 | 2019-06-11 | 长春工程学院 | Based on magnetostrictive displacement sensor irrigation water coefficient of viscosity detection device and method |
| CN111396495A (en) * | 2020-03-25 | 2020-07-10 | 桂林电子科技大学 | Shock absorber and commercial car suspension |
| CN112729479A (en) * | 2020-12-23 | 2021-04-30 | 北京斯克维思仪表有限公司 | Coil type magnetostrictive sensor |
| WO2022252227A1 (en) * | 2021-06-04 | 2022-12-08 | Abb Schweiz Ag | Sensing assembly for use in piezoelectric liquid level sensor |
| CN113432521A (en) * | 2021-06-11 | 2021-09-24 | 北京奥特美克科技股份有限公司 | High-precision displacement sensor |
| CN114264221A (en) * | 2021-12-24 | 2022-04-01 | 南昌工程学院 | Magnetostrictive displacement sensor for precise control |
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Application publication date: 20181019 |