CN102506989A - Speed-type vibration sensor with adjustable magnetic circuit - Google Patents
Speed-type vibration sensor with adjustable magnetic circuit Download PDFInfo
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- CN102506989A CN102506989A CN2011103282877A CN201110328287A CN102506989A CN 102506989 A CN102506989 A CN 102506989A CN 2011103282877 A CN2011103282877 A CN 2011103282877A CN 201110328287 A CN201110328287 A CN 201110328287A CN 102506989 A CN102506989 A CN 102506989A
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Abstract
The invention relates to the technical field of a vibration sensor, in particular to a speed-type vibration sensor with an adjustable magnetic circuit. A conventional vibration sensor has the problems that a magnetic circuit structure has relatively high flux leakage; the strength of a magnetic field at a gap between a yoke and a housing is low; and the strength of the magnetic field cannot be regulated. For solving the problems in the prior art, the invention adopts the technical scheme that the speed-type vibration sensor with the adjustable magnetic circuit comprises a housing, an upper cover, a lower cover, an upper pressure block, a lower pressure block, an inner magnet assembly and a spring-mass system; the inner magnet assembly comprises an upper core shaft, a lower core shaft, an upper permanent magnet, a lower permanent magnet, an upper pressure block and a lower pressure block; the radial upper permanent magnet is sleeved outside the middle part of the upper core shaft; the radial lower permanent magnet is sleeved outside the lower end part of the lower core shaft; the end faces of both the upper permanent magnet and the lower permanent magnet are provided with ring-shaped gaskets; and an outer sleeve is arranged on the radial excircle surface. According to the invention, the flux leakage is effectively reduced and the anti-interference capability is improved.
Description
Technical field:
The present invention relates to the vibration transducer technical field, specifically is a kind of velocity profile vibration transducer of adjustable magnetic circuit.
Background technology:
Vibration transducer becomes the mechanical-electric coupling conversion equipment of electric energy in order to the energy conversion with structure or ground vibration, and the most frequently used vibration transducer is the velocity profile sensor, i.e. the voltage signal of sensor output is directly proportional with structural vibrations speed.Wherein be that a coil is hung on by in the formed magnetic field of permanent magnet; Vibration wave makes between coil and the magnet and produces relative motion, and coil cutting magnetic line produces electric signal at coil; Coil has hysteresis when beginning, moved reciprocatingly through the original position by the spring leaf vibration subsequently.
According to Faraday's electromagnetic induction law; Wire coil length is that L is perpendicular to magnetic flux density B; Move perpendicular to speed
again; Produce a magnitude of voltage at the two ends of coil, can be calculated as follows:
Magnitude of voltage is proportional to coil that seismic energy the causes relative velocity for magnet; Can suppose that magnetic flux density is essentially a constant; Can accomplish the voltage signal that a circuit comes the monitoring vibration sensor to produce; This signal is in order to survey the characteristic that produces vibrational structure, the position of structure under the face of land of measurable reflection seismic energy in seismic prospecting.
Vibration transducer is used for the seismic prospecting industry and is called seismoreceiver.At present, the development of world's seismic prospecting forward high resolving power requires seismoreceiver to high precision, broadband, and the low distortion direction develops, promptly super wave detector.It is compared with common wave detector has wideer dynamic range, littler degree of distortion, anti-electromagnetic interference (EMI) and high-precision parameter consistency etc.
Conventional at present vibration transducer; The loam cake and the lower cover that comprise shell, shell two ends; Be provided with the inner magnet assembly that magnet, sleeve and yoke constitute in the shell, the magnet axial setting, the axial two ends of magnet are embedded on the end face of a pair of yoke; The arranged outside of magnet has sleeve, and the two ends of sleeve are located between two yokes.Be provided with spring-quality system between shell and the inner magnet assembly.
The common structure of spring-quality system is: go up coil winding and lower coil winding and be wound in respectively on coil former and the lower coil frame; Last coil former and lower coil frame connect through adapter sleeve; Respectively be equipped with upper spring sheet and upper spring sheet in the groove of the outer face of said upward coil former and lower coil frame, the other end of upper spring sheet and upper spring sheet is located between loam cake and lower cover and the yoke by pressure.Two connection terminals that said loam cake middle part wears respectively with spring-quality system in last coil winding be connected with the lower coil winding.
Magnet, yoke and shell constitute a closed-loop path in this structure.The problem that the conventional vibration sensor exists is: the leakage field of magnetic structure is relatively large, and the gap location magnetic field intensity between yoke and shell is less, and the size of its magnetic field intensity can't be adjusted.
Summary of the invention:
The present invention will provide a kind of velocity profile vibration transducer of adjustable magnetic circuit, improving the leakage field of sensor magnetic structure, and realizes the adjustment of magnetic field intensity in the gap through regulating device, improves the precision of transducer sensitivity parameter.
The purpose of patent of the present invention is achieved in that
A kind of velocity profile vibration transducer of adjustable magnetic circuit; Comprise shell, loam cake, lower cover, inner magnet assembly and spring-quality system; Comprise coil former, lower coil frame, upper spring sheet and upper spring sheet in spring-quality system; An end of upper spring sheet and upper spring sheet is arranged at respectively on the outer face of coil former and lower coil frame, it is characterized in that:
Said inner magnet assembly comprises mandrel, descends mandrel, goes up permanent magnet, descends permanent magnet, upper holder block and lower lock block; The said outside, middle part of going up mandrel is arranged with last permanent magnet radially; The outside, bottom of following mandrel is arranged with last permanent magnet radially; Be provided with the pad of ring-type on the end face of last permanent magnet and following permanent magnet, radially periphery is provided with outer sleeve; Said mandrel and the coaxial setting of following mandrel, the sleeve that the last mandrel between the upper surface of the lower surface of last permanent magnet and following permanent magnet and the arranged outside of following mandrel have non-magnet material to process gone up;
Said top of going up mandrel is arranged in the loam cake with thread matching structure; Be provided with the upper holder block of ring-type between the upper surface of last permanent magnet and the loam cake; Said lower lock block is located in down between the lower surface and lower cover of permanent magnet, and the lower end of center and following mandrel is fixedly connected;
Said two connection terminals are arranged on the outer ring of loam cake and are connected with spring-quality system respectively, and the upper spring sheet in said spring-quality system, the other end of upper spring sheet are pressed and be located between loam cake and lower cover and upper holder block and the lower lock block.
Gap≤10mm between the end of above-mentioned upward mandrel and following mandrel.
The material of above-mentioned pad is a magnetic temperature compensating alloy.
Advantage of the present invention is:
(1) utilizes the characteristics and the rare earth permanent-magnetic material high-coercive force in the radial magnetic field of annular permanent magnet,, reduced leakage field effectively, improved antijamming capability in the characteristics of its magnetic line of force line of radiation of magnetic pole two ends.In the annular space of sensor, setting up the high strength uniform magnetic field, and make full use of the magnetic energy of magnet.Spring-quality system of forming by spring leaf, coil and coil former; This system places by the uniform magnetic field air gap between magnet and the shell; When matrix moves; Be fixed in the sensor device movement therewith on the matrix, the spring-quality system in the sensor moves with respect to magnet in magnetic field.In coil winding, produce corresponding induction electromotive force; The binding post of loam cake is drawn; In coil former, responded to simultaneously vortex flow, this vortex flow produces the damping force opposite with direction of motion, i.e. an electromagnetic damping; Make the oscillating mass system do damped motion, finally make sensor produce a Hi-Fi output signal.
(2) permanent magnet adopts neodymium iron boron, adopts the magnet radial poles structure, each utmost point of the promptly interior outside; And the polarity of last permanent magnet and following permanent magnet is just in time opposite, between permanent magnet and shell, forms the annulus magnetic field structure, and it is high that it has the gap field intensity; Magnetic field is even; Leakage field is little, and economical with materials is convenient to characteristics such as installation.Between the two poles of the earth of magnet; Temperature compensation alloy is installed; Eliminate temperature variation and cause the variation in magnetic field; Make its working gas gap field strong stability, and be positioned over the magnetic conduction sleeve of outer wall can homogenising because the magnet that the brought uneven situation of performance everywhere that magnetizes, guarantee the stability of transducer sensitivity parameter.
(3) the last mandrel of magnetic conduction is through regulating its position with the helicitic texture of loam cake; Go up the size that mandrel and the relative position of following mandrel are regulated the gap through changing; Minimum can arrive zero, in order to the magnetic field intensity of annular space between adjusting permanent magnet and the shell, thus the sensitivity of realization adjustment sensor; Can guarantee the consistance of parameter for the series and parallel of a plurality of sensors, for enterprise production brings convenience.
Description of drawings:
Fig. 1 is the sectional elevation figure of the vibration transducer of prior art;
Fig. 2 is a structural representation of the present invention;
Fig. 3 ~ Fig. 6 is a structural representation of going up permanent magnet and following permanent magnet.
Description of reference numerals is following:
The 1-loam cake, 2-upper holder block, the last permanent magnet of 3-, 4-shell, the last coil former of 5-, 6-adapter sleeve; 7-lower coil frame, 8-pad, the last permanent magnet of 9-, 10-outer sleeve, 11-lower cover, 12-connection terminal; 13-upper spring sheet, 14-lower spring sheet, the last coil winding of 15-, 16-is deletion later, the last mandrel of 17-, 18-sleeve; Mandrel under the 19-, 20-lower coil winding, 21-lower lock block, 22-magnet, 23-yoke.
Embodiment:
To combine accompanying drawing and embodiment that the present invention is at length explained below.
Referring to Fig. 1, vibration transducer of the prior art comprises the loam cake 1 and the lower cover 11 at shell 4, shell 4 two ends.Be provided with the inner magnet assembly that magnet 22, sleeve 18 and yoke 23 constitute in the said shell 4; Magnet 22 in the inner magnet assembly axially is provided with; The axial two ends of magnet 22 are embedded on the end face of a pair of yoke 23; The arranged outside of magnet 22 has sleeve 18, and the two ends of sleeve 18 are located between two yokes.Be provided with spring-quality system between said shell 4 and the inner magnet assembly.
The common structure of spring-quality system is: go up coil winding 15 and be wound in respectively on coil former 5 and the lower coil frame 7 with lower coil winding 20; Last coil former 5 connects through adapter sleeve 6 with lower coil frame 7; Respectively be equipped with upper spring sheet 13 and upper spring sheet 14 in the groove of the outer face of said upward coil former 5 and lower coil frame 7, the other end of upper spring sheet 13 and upper spring sheet 14 is located between loam cake 1 and lower cover 11 and the yoke 23 by pressure.Two connection terminals 12 that said loam cake 1 middle part wears respectively with spring-quality system in last coil winding 15 be connected with lower coil winding 20.
Magnet 22, yoke 23 constitute a closed-loop path with shell 4 in this structure.
Referring to Fig. 2, the velocity profile vibration transducer of a kind of adjustable magnetic circuit provided by the invention comprises shell 4, loam cake 1, lower cover 11, upper holder block 2, lower lock block 21, inner magnet assembly and spring-quality system.
Said inner magnet assembly comprises mandrel 17, following mandrel 19, goes up permanent magnet 3 and following permanent magnet 9; The said outside, middle part of going up mandrel 17 is arranged with last permanent magnet 3 radially; The outside, bottom of following mandrel 19 is arranged with following permanent magnet 9 radially; Be provided with the pad 8 of ring-type on the end face of last permanent magnet 3 and following permanent magnet 9, radially periphery is provided with outer sleeve 10; Said go up is provided with gap delta (0≤δ≤10mm) between mandrel 17 and 19 coaxial settings of following mandrel and the end.The sleeve 18 that the last mandrel 17 between the upper surface of the lower surface of last permanent magnet 3 and following permanent magnet 9 and the arranged outside of following mandrel 19 have non-magnet material to process, last mandrel (17) is slidingly matched with sleeve (18); Said top of going up mandrel 17 is arranged in the loam cake 1 with thread matching structure; Be provided with the upper holder block 2 of ring-type between the upper surface of last permanent magnet 3 and the loam cake 1; Said lower lock block 21 is located in down between the lower surface and lower cover 11 of permanent magnet 9, and the lower end of center and following mandrel 19 is fixedly connected;
Said spring-quality system comprises coil former 5, lower coil frame 7, upper spring sheet 13, upper spring sheet 14, goes up coil winding 15 and lower coil winding 20.Last coil winding 15 is wound in respectively on coil former 5 and the lower coil frame 7 with lower coil winding 20; Last coil former 5 connects through adapter sleeve 6 with lower coil frame 7; An end of said upper spring sheet 13 and upper spring sheet 14 is arranged at respectively on the outer face of coil former 5 and lower coil frame 7, and the other end is pressed and is located between loam cake 1 and lower cover 11 and upper holder block 2 and the lower lock block 21.
Said two connection terminals 12 be arranged on the outer ring of loam cake 1 and respectively with spring-quality system in last coil winding 15 be connected with lower coil winding 20.
Design concept of the present invention is: the inner magnet assembly is fixed in the chamber of shell through covers and two briquettings; The annular space of gapped suitable distance between the inner magnet assembly outside and outer casing inner wall forms adjustable gap between last mandrel and the following mandrel.Endoporus and the cylindrical of wherein going up permanent magnet 3 and following permanent magnet 9 are respectively two magnetic poles, and the polarity of two magnets is opposite.Like this, constitute the loop with regard to the magnetic line of force is sent through shell, two magnets and two mandrels from the cylindrical of a magnet wherein, thereby between two magnets and shell, form gap magnetic field, and in the opposite direction two formed magnetic flux densities of annular space.
The pad 8 that is installed on the magnet upper and lower surface is magnetic temperature compensating alloy, because temperature variation causes the change of magnet performance, with the stability magnets performance, makes gap magnetic field intensity can reach steady state (SS) in order to compensation.
Coiling cutting magnetic line in spring-quality system on the coil former produces electromotive force, draws through the connection terminal on the loam cake 1 12.And coil former is a metal material, and motion produces the induced electricity eddy current in magnetic field, thereby for spring-quality vibrational system damping is provided.
All magnetic circuit systems, spring-quality system are installed in the inner chamber with the O-ring seal sealing that is made up of shell 4, loam cake 1, lower cover 11.
The permanent magnetic material that the present invention is used: be enough magnetic field intensitys to be arranged so that the magnetic material of enough voltage output to be provided, any have higher coercive force (generally surpassing 4000 oersteds) and just can produce a uniform magnetic field greater than the magnet of 6000 Gausses' remanence.The used permanent magnet of the present invention is that rare earth material is processed, and is coated with zinc/nickel dam at the outside surface of rare earth material; Used permanent magnet is processed with NdFeB material; Described magnet assembly has temperature compensation function to guarantee the precision and the consistance of sensor parameter under different temperatures, reaches best result of use.
Referring to Fig. 3 ~ Fig. 6, the last permanent magnet 3 and the following permanent magnet 9 of described annular radial can be processed with a full circle annular permanent magnet and also can use bonding the forming of 2-36 piece secter pat assembly unit.At the circle cover that the cylindrical of permanent magnet has a usefulness high permeability material to process, be used for the field intensity of uniform outer surface, make the gap field intensity more even.
By above-mentioned visible, the present invention can well be suitable for realizing used above-mentioned purpose that provides and characteristics, and have significantly and device structure intrinsic advantage.
Equally, some characteristic and again combination be utilizable be can need not to consider other characteristic and be utilized in combination, this will be considered in the claim scope.
Because allow how possible embodiment to be made and do not exceeded its category by the present invention, therefore, the statement here or accompanying drawing demonstration all the elements all should regard illustrative as, rather than restrictive.
Claims (3)
1. the velocity profile vibration transducer of an adjustable magnetic circuit; Comprise shell (4), loam cake (1), lower cover (11), inner magnet assembly and spring-quality system; Comprise coil former (5), lower coil frame (7), upper spring sheet (13) and upper spring sheet (14) in spring-quality system; An end of upper spring sheet (13) and upper spring sheet (14) is arranged at respectively on the outer face of coil former (5) and lower coil frame (7), it is characterized in that:
Said inner magnet assembly comprises mandrel (17), descends mandrel (19), goes up permanent magnet (3), descends permanent magnet (9), upper holder block (2) and lower lock block (21); The said outside, middle part of going up mandrel (17) is arranged with last permanent magnet (3) radially; The outside, bottom of following mandrel (19) is arranged with last permanent magnet (9) radially; Be provided with the pad (8) of ring-type on the end face of last permanent magnet (3) and following permanent magnet (9), radially periphery is provided with outer sleeve (10); Said mandrel (17) and the coaxial setting of following mandrel (19), the sleeve (18) that the last mandrel (17) between the upper surface of the lower surface of last permanent magnet (3) and following permanent magnet (9) and the arranged outside of following mandrel (19) have non-magnet material to process gone up;
Said top of going up mandrel (17) is arranged in the loam cake (1) with thread matching structure; Be provided with the upper holder block (2) of ring-type between the upper surface of last permanent magnet (3) and the loam cake (1); Said lower lock block (21) is located in down between the lower surface and lower cover (11) of permanent magnet (9), and the lower end of center and following mandrel (19) is fixedly connected;
Said two connection terminals (12) are arranged on the outer ring of loam cake (1) and are connected with spring-quality system respectively, and the upper spring sheet (13) in said spring-quality system, the other end of upper spring sheet (14) are pressed and be located between loam cake (1) and lower cover (11) and upper holder block (2) and the lower lock block (21).
2. according to the velocity profile vibration transducer of the said adjustable magnetic circuit of claim 1, it is characterized in that: the gap≤10mm between the end of said upward mandrel (17) and following mandrel (19).
3. according to the velocity profile vibration transducer of claim 1 or 2 said adjustable magnetic circuits, it is characterized in that: the material of said pad (8) is a magnetic temperature compensating alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110328287.7A CN102506989B (en) | 2011-10-26 | 2011-10-26 | Speed-type vibration sensor with adjustable magnetic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110328287.7A CN102506989B (en) | 2011-10-26 | 2011-10-26 | Speed-type vibration sensor with adjustable magnetic circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102506989A true CN102506989A (en) | 2012-06-20 |
| CN102506989B CN102506989B (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110328287.7A Expired - Fee Related CN102506989B (en) | 2011-10-26 | 2011-10-26 | Speed-type vibration sensor with adjustable magnetic circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954350A (en) * | 2014-04-23 | 2014-07-30 | 久盛电气股份有限公司 | High temperature resisting non-contact blade vibration testing sensor |
| CN110068390A (en) * | 2018-05-15 | 2019-07-30 | 西安工业大学 | Piezoelectricity and electromagnetic coupling vibrating sensor |
| CN112963607A (en) * | 2021-02-05 | 2021-06-15 | 中国地震局工程力学研究所 | Control system with double magnetic circuit sensors |
| CN112964353A (en) * | 2021-04-21 | 2021-06-15 | 中国地震局工程力学研究所 | Double-magnetic-circuit sensor |
| RU211338U1 (en) * | 2022-02-08 | 2022-06-01 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ивановский государственный энергетический университет имени В.И. Ленина" (ИГЭУ) | DEVICE FOR MEASURING VIBRATIONS |
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| CN202274922U (en) * | 2011-10-26 | 2012-06-13 | 西安工业大学 | Speed type vibration sensor with magnetic circuit capable of being adjusted |
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Patent Citations (7)
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| US4446741A (en) * | 1981-06-01 | 1984-05-08 | Prvni Brnenska Strojirna, Narodni Podnik | Vibration transducer |
| CN1230693A (en) * | 1998-03-30 | 1999-10-06 | 孙碧华 | Vibration sensor |
| KR20020066354A (en) * | 2001-02-19 | 2002-08-16 | 주식회사 청정엔지니어링 | Non-power emergency blocking safe valve |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954350A (en) * | 2014-04-23 | 2014-07-30 | 久盛电气股份有限公司 | High temperature resisting non-contact blade vibration testing sensor |
| CN110068390A (en) * | 2018-05-15 | 2019-07-30 | 西安工业大学 | Piezoelectricity and electromagnetic coupling vibrating sensor |
| CN110068390B (en) * | 2018-05-15 | 2024-03-01 | 西安工业大学 | Piezoelectric and electromagnetic coupling vibration sensor |
| CN112963607A (en) * | 2021-02-05 | 2021-06-15 | 中国地震局工程力学研究所 | Control system with double magnetic circuit sensors |
| CN112964353A (en) * | 2021-04-21 | 2021-06-15 | 中国地震局工程力学研究所 | Double-magnetic-circuit sensor |
| CN112964353B (en) * | 2021-04-21 | 2021-10-12 | 中国地震局工程力学研究所 | Double-magnetic-circuit sensor |
| RU211338U1 (en) * | 2022-02-08 | 2022-06-01 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ивановский государственный энергетический университет имени В.И. Ленина" (ИГЭУ) | DEVICE FOR MEASURING VIBRATIONS |
| RU222614U1 (en) * | 2023-11-01 | 2024-01-12 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ивановский государственный энергетический университет имени В.И. Ленина" (ИГЭУ) | DEVICE FOR MEASURING VIBRATIONS |
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| CN102506989B (en) | 2014-03-26 |
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