CN1292225C - Gap displacing sensor of high-speed magnetic suspension train - Google Patents
Gap displacing sensor of high-speed magnetic suspension train Download PDFInfo
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- CN1292225C CN1292225C CN 200410024637 CN200410024637A CN1292225C CN 1292225 C CN1292225 C CN 1292225C CN 200410024637 CN200410024637 CN 200410024637 CN 200410024637 A CN200410024637 A CN 200410024637A CN 1292225 C CN1292225 C CN 1292225C
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- displacement sensor
- gap
- speed maglev
- maglev train
- circuit
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Abstract
The present invention discloses a gap displacement sensor of a high-speed magnetic suspension train, which is inlaid on an electromagnet module so as to transfer the suspension gap information of the train to a control system. The sensor comprises an aluminium casing, an orbital plane opening facing to the high-speed magnetic suspension train, a hollow and planar detection coil, and a detection circuit connected with the detection coil. The adoption of the gap displacement sensor of a high-speed magnetic suspension train can effectively avoid the influence from a tooth space form surface to the output, and can accommodate the influence of complicated field environment simultaneously. Additionally, the measurement range meets the requirements of a high-speed magnetic suspension system, and the capability of fault redundancy is good.
Description
Technical field
The present invention relates to a kind of gap digit displacement sensor of high-speed maglev train, specifically, relate to the current vortex sensor that is used for measuring gap displacement between high speed aerotrain suspension electromagnetic module and the stator track.
Background technology
High-speed maglev train becomes a kind of effective means of conveyance that solves quick logistics, the stream of people.In order to ensure vehicle stabilization be suspended in certain interval, the gap digit displacement sensor must be timely and effectively passes to control system with the levitation gap information of vehicle.And often lead the high-speed maglev train of inhaling floating type is a kind of structure of linear synchronous motor, the orbit of this magnetic-levitation train is exactly a kind of long stator that is embedded with three-phase coil, as shown in Figure 1, gap sensor embeds and is installed on the levitating electromagnet, and the surface measurements that the measurement coil surface is faced is the form of teeth groove.When magnetic-levitation train is worked, levitating electromagnet under the effect of exciting current, produce Y to suspension suction, and the alternating current in the stator track produces travelling-magnetic-field, dragging levitating electromagnet moves forward along track, therefore, the magnetic field environment more complicated of this kind gap digit displacement sensor, suspension magnetic, travelling-magnetic-field, multiple magnetic field coexistences such as generating magnetic field, and sensor with electromagnet when track moves, the surface measurements that it is faced is the alternate alveolar surface, it is not the surface measurements of common plane form, so general gap sensor is applied in this occasion, teeth groove surface variation must cause the fluctuation of output signal, can not adapt to the requirement of special measurement environment simultaneously on the structure, can't offer the effective displacement information of suspension control system, therefore general gap sensor can not adapt to the high-speed maglev train system.
Summary of the invention
The object of the present invention is to provide a kind of gap digit displacement sensor of high-speed maglev train, to solve the technical matters that general eddy current displacement sensor can not adapt to the high-speed maglev train system.
In order to achieve the above object, technical scheme of the present invention is as follows:
A kind of gap digit displacement sensor of high-speed maglev train is embedded on the electromagnet module, and the levitation gap information of train is passed to control system; This sensor comprises: aluminium shell, towards the orbital plane opening of high-speed maglev train; Magnetic test coil, it is the plane form of hollow; Testing circuit links to each other with magnetic test coil.
Described testing circuit comprises continuous oscillation circuit and detection rectification circuit.
Described oscillation circuit applies higher-order of oscillation electric current to magnetic test coil.
Described magnetic test coil and testing circuit respectively are two.
Described two testing circuits lead to one and compare output unit.
Be provided with pre-amplification circuit between described testing circuit and the comparison output unit.
Described oscillatory circuit is a FMAM structure oscillation circuit, and its oscillation frequency is roughly 2,000,000.
Adopt the gap digit displacement sensor of above-mentioned high-speed maglev train, can effectively avoid the influence of slot form surface to output, can adapt to the influence of complicated magnetic field environment simultaneously, measurement range satisfies the needs of high-speed maglev train system, and the fault redundance ability is good.
Description of drawings
Fig. 1 is the synoptic diagram on gap digit displacement sensor installation site and tested guide rail surface;
Fig. 2 is the outside drawing that gap digit displacement sensor of the present invention is measured coil;
Fig. 3 is the construction module schematic diagram of gap digit displacement sensor of the present invention;
Fig. 4 is the oscillatory circuit figure of gap digit displacement sensor of the present invention.
The number in the figure explanation
The 1-flank of tooth
The 2-stator track
The 3-groove face
The 4-electromagnet
5-sensor riding position
6-detection rectification circuit interface
Embodiment
According to Fig. 1 to Fig. 4, provide better embodiment of the present invention, and described in detail below, enable to understand better function of the present invention, characteristics.
As shown in Figure 1, wherein label 1 is represented the flank of tooth, label 2 expression stator tracks, label 3 expression groove faces, label 4 expression electromagnet, label 5 expression sensor riding positions.According to measuring the slot form that raceway surface comprises the flank of tooth 1, groove face 3, coil is measured in design, for fear of the influence of teeth groove to measurement result, the magnetic field of measuring coil vibration emission is evenly distributed at raceway surface, like this, when measure coil along track x to moving y when the gap displacement remains unchanged, the slot form variation is coupled into measuring-signal output through magnetic field can remain steady state value, so can eliminate the influence of slot form to measurement result, final signal of sensor is the little stabilization signal of a fluctuating error; The magnetic field environment more complicated that sensor is positioned at, mainly contain the excitation field of magnet coil, travelling-magnetic-field, and possible generating magnetic field, the shell of sensor adopts aluminum, only be towards the orbital plane opening, excitation field can be shielded like this that the capable wave frequency of propelling is relatively low, the oscillation frequency of sensor is very high, coil is the plane form of hollow, and travelling-magnetic-field coupling amount is few, and output is disturbed little.Fig. 2 is the outside drawing that gap digit displacement sensor of the present invention is measured coil.Fig. 3 is the construction module schematic diagram of gap digit displacement sensor, oscillation circuit applies higher-order of oscillation electric current in measuring coil, this moment, the coil surrounding space produced high frequency magnetic field, the measured conductor that is arranged in magnetic field will produce eddy current, current vortex also will produce alternating magnetic field, both magnetic directions are opposite, the equiva lent impedance of measuring coil is changed, the amplitude and the frequency of oscillator signal change, and the amplitude of utilizing detecting circuit to extract oscillator signal changes, and just can set up the relation between amplitude and the measuring distance, for improving reliability, adopt the twin coil redundancy structure, promptly used the identical circuit of two nested structures, also can eliminate the common mode influence of travelling-magnetic-field simultaneously.Being connected to pre-amplification circuit behind the detecting circuit, is to compare output unit behind the pre-amplification circuit.In order to take into account measurement range and sensitivity, sensor adopts FMAM structure oscillation circuit as shown in Figure 4, and oscillation frequency is about 2M.Wherein label 6 is represented the detection rectification circuit interfaces.
Because the arrangement of coil can realize measuring magnetic field and evenly distribute at tested raceway surface, the influence of slot form can be contained, the ability of the anti-slot effect of sensor effectively improves, effective range can reach 40mm, teeth groove influence is less than ± 0.8mm, disturbing effect is little, adopts the structure of twin coil, improves the fault redundance ability of sensor.
In actual the use, coil, oscillatory circuit and aluminium shell are installed on one, finally are embedded on the electromagnet module, move along orbital plane with vehicle.
Above-described; it only is preferred embodiment of the present invention; be not in order to limiting scope of the present invention, promptly every simple, equivalence of doing according to the claims and the description of the present patent application changes and modifies, and all falls into the claim protection domain of patent of the present invention.
Claims (7)
1, a kind of gap digit displacement sensor of high-speed maglev train is embedded on the electromagnet module, and the levitation gap information of train is passed to control system; This sensor comprises:
Aluminium shell is towards the orbital plane opening of high-speed maglev train;
Magnetic test coil, it is the plane form of hollow;
Testing circuit links to each other with magnetic test coil.
2, the gap digit displacement sensor of high-speed maglev train as claimed in claim 1 is characterized in that, described testing circuit comprises continuous oscillatory circuit and detection rectification circuit.
3, the gap digit displacement sensor of high-speed maglev train as claimed in claim 2 is characterized in that, described oscillatory circuit applies higher-order of oscillation electric current to magnetic test coil.
As the gap digit displacement sensor of the described high-speed maglev train of arbitrary claim in the claim 1 to 3, it is characterized in that 4, described magnetic test coil and testing circuit respectively are two.
5, the gap digit displacement sensor of high-speed maglev train as claimed in claim 4 is characterized in that, described two testing circuits lead to one and compare output unit.
6, the gap digit displacement sensor of high-speed maglev train as claimed in claim 5 is characterized in that, is provided with pre-amplification circuit between described testing circuit and the comparison output unit.
7, the gap digit displacement sensor of high-speed maglev train as claimed in claim 2 is characterized in that, described oscillatory circuit is a FMAM structure oscillation circuit, and its oscillation frequency is roughly 2,000,000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024637 CN1292225C (en) | 2004-05-25 | 2004-05-25 | Gap displacing sensor of high-speed magnetic suspension train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024637 CN1292225C (en) | 2004-05-25 | 2004-05-25 | Gap displacing sensor of high-speed magnetic suspension train |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1584491A CN1584491A (en) | 2005-02-23 |
| CN1292225C true CN1292225C (en) | 2006-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410024637 Withdrawn - After Issue CN1292225C (en) | 2004-05-25 | 2004-05-25 | Gap displacing sensor of high-speed magnetic suspension train |
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| Country | Link |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357706C (en) * | 2005-07-01 | 2007-12-26 | 中国人民解放军国防科学技术大学 | Method for detecting position and speed of object moving along orbit |
| CN101825428B (en) * | 2010-04-29 | 2011-09-21 | 中国人民解放军国防科学技术大学 | Gap sensor calibration system of magnetic-levitation train |
| CN105352425B (en) * | 2015-11-03 | 2018-09-21 | 西南交通大学 | A kind of single probe twin coil self diagnosis magnetic floating train suspending air gap sensors |
| CN107084660B (en) * | 2017-04-26 | 2019-04-02 | 广州精信仪表电器有限公司 | A kind of high reliability magnetic floating train suspending sensor based on redundancy structure |
| CN109425288A (en) * | 2017-09-02 | 2019-03-05 | 湖南北斗星空自动化科技有限公司 | A method of track plank split is monitored automatically using magnetostrictive displacement range measurement principle |
| CN109270475B (en) * | 2018-09-27 | 2023-09-22 | 中国人民解放军国防科技大学 | High-speed magnetic levitation long stator traction traveling wave magnetic field detection system |
| CN109774489B (en) * | 2019-01-17 | 2020-11-27 | 同济大学 | Two-by-two-out-of-two redundant maglev train suspension sensor and control method |
| CN109612380A (en) * | 2019-01-28 | 2019-04-12 | 江阴信和电力仪表有限公司 | A kind of coil redundance type eddy current displacement sensor |
| CN109883319B (en) * | 2019-01-31 | 2020-11-24 | 江西理工大学 | Permanent magnet suspension lateral deviation detection method and system |
| CN110375633B (en) * | 2019-08-08 | 2020-04-28 | 西南交通大学 | Grid-shaped planar capacitive sensor for detecting suspension gap of magnetic suspension vehicle |
| CN113251980B (en) * | 2021-06-23 | 2021-11-02 | 湖南磁浮技术研究中心有限公司 | Magnetic suspension train sensor error calibration method, device, equipment and storage medium |
-
2004
- 2004-05-25 CN CN 200410024637 patent/CN1292225C/en not_active Withdrawn - After Issue
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| Publication number | Publication date |
|---|---|
| CN1584491A (en) | 2005-02-23 |
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