CN2385346Y - Passive solid-state magnetic field sensor - Google Patents
Passive solid-state magnetic field sensor Download PDFInfo
- Publication number
- CN2385346Y CN2385346Y CN 99239314 CN99239314U CN2385346Y CN 2385346 Y CN2385346 Y CN 2385346Y CN 99239314 CN99239314 CN 99239314 CN 99239314 U CN99239314 U CN 99239314U CN 2385346 Y CN2385346 Y CN 2385346Y
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- magnetic field
- field sensor
- magnetic
- passive solid
- sensor assembly
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Abstract
The utility model relates to a passive solid-state sensor which is characterized in that a magnetic field sensor unit is formed by the mutual engagement of a surface of magnetostrictive materials and a surface of piezoelectric ceramics, a plurality of the sensor units are overlapped, and a magnetic field sensor assembly is compositely formed. When two layers of magnetostrictive elements are compounded on both sides of one layer of piezoelectric element layer, a best effect can be achieved. The utility model can be used for measuring rotating speed, flowrate, current intensity, can be used for magnetic imaging, magnetic recording, and magnetic recording medium.
Description
The utility model relates to the Magnetic Sensor field, belongs to the device of measuring magnetic field or changes of magnetic field specifically, can be used for measuring with any linearity of control or rotatablely move, fluid flow and electric current, it can also be applied to magnetic imaging, magnetic recording head and magnetic recording media.
Magnetic field sensor is used more extensive, actual user wishes to improve sensitivity, the linearity, stability, reliability, working temperature, the frequency range of sensor, wish to reduce cost, reduce size, weight and energy consumption simultaneously, this is very difficult, does not have a kind of sensor can finish above-mentioned all functions well.The most frequently used Magnetic Sensor has two kinds of hall effect sensor and magnetic induction coils, the original signal that the former produces is less, temperature stability is poor, necessarily require complicated signal Processing, the device consumed energy, the magnetic field dynamic range is little simultaneously, the size of latter's output signal is directly proportional with the variation speed of magnetic flux, therefore signal can descend with speed and diminish, when variation rate of magnetic flux be lower than a certain down in limited time, signal can disappear among the noise.
The purpose of this utility model provides a kind ofly need not import power supply, and has higher temperature stability, bigger magnetic-field measurement scope, the higher magnetic field sensitivity and the linearity, more important and energy measurement magnetic field or changes of magnetic field arranged, detectable any linearity or rotatablely move, a kind of passive solid magnetic field sensor of power strength, linearity and position of rotation, magnetic imaging, magnetic recording head and magnetic note medium.
For finishing the technical scheme that above-mentioned purpose is taked: magnetostriction element layer and piezoelectric element layer face one another magnetic field sensor unit of the compound composition of face, the compound overlappingly composition magnetic field sensor sets of several the sensor units part is good with its two compound magnetostriction element layers of one deck piezoelectric element.This magnetic field sensor assembly one end is fixed with the cantilever design form, this magnetic field sensor assembly two ends or overall fixed simultaneously, this magnetic field sensor assembly one end or two ends be fixed in permanent magnet near, permanent magnet on propagated sensation device assembly and the driving wheel or magnetic steel gear can be matched and reach the survey rotating speed, can match with a magnetic impeller and record flow, can record strength of current near being arranged at electric wire.
The utility model is a solid form, need not import power supply, temperature stability is good, have bigger magnetic-field measurement scope and the magnetic field sensitivity and the linearity, replace to a great extent simultaneously that a large amount of at present lines of magnetic induction that use enclose, Hall effect device, magnetic resistance half guiding element and the up-to-date giant magnetoresistance components and parts of developing.
The utility model embodiment is described in detail in conjunction with the accompanying drawings.
Fig. 1 is the utility model cellular construction sectional view;
Fig. 2 is the component drawings of the utility model unit combination;
Fig. 3 is another component drawings of the utility model unit combination;
This sensor module of Fig. 4 one end cantilever mounting structure figure;
The whole i.e. two end fixed structure charts of this sensor module of Fig. 5;
Fig. 6 the utility model is measured the rotating speed structural drawing;
Fig. 7 the utility model is measured flow structure figure;
Fig. 8 the utility model is measured the electric current structural drawing.
According to shown in Figure 1, by ferrocobalt, iron-nickel alloy, iron amorphized silicon alloy or iron nisiloy non-crystaline amorphous metal form magnetostriction element layer 1 and piezoelectric element promptly the piezoelectric element layer 2 formed of one two face piezoelectricity PZP potsherd of being coated with electrode fix face-to-face mutually and form magnetic field sensor unit, according to shown in Figure 3, two magnetostrictive layers 1 are laminated with composition magnetic field sensor assembly 5 according to the requirement on using at two end arbitrary faces of a piezoelectric layer 2 again.Same two piezoelectricity faces 2 are laminated with composition magnetic field sensor assembly 5 as shown in Figure 2 at two faces of a magnetostrictive layer 1 as requested.When being placed in the magnetic field that is enough to change its direction of magnetization as above-mentioned magnetic field sensor 5, magnetostriction element just produces a deformation, then this deformation is passed to the piezoelectric element that faces mutually 2 that combines with magnetostriction element 1, produced electric signal output by piezoelectric element 2 at last.The semi-girder mode is adopted in the deformation because raising magnetostriction element 1 is inducted as shown in Figure 4, and the signal of generation is bigger, but the machine performance instability, with two ends or whole layer fixed form, it is stable also can to produce large-signal and machine performance.So major applications latter.
This magnetic field sensor assembly 5 is arranged on the edge of rotating disk 4, these rotating disk 4 peripheries etc. are arranged with six blocks of magnet 3 as shown in Figure 6, when rotating disk 4 rotates, each piece magnet just can produce a sine wave through sensor module 5 under the effect in magnetic field, how many then every how many pulses of generation just can record its rotating speed, have how much magnet to remove with magnet on the rotating disk, then record how many revolutions, this sensor has recorded its rotating speed, but the speed of measured automobiles, aircraft and train in like manner.
This magnetic field sensor assembly 5 is arranged on the traffic channel mouth, and its passway is provided with impeller, and blade tip is put magnet 3 equally, when fluid through the passway, blade rotation, sensor can be measured the rotating speed of impeller, thereby is converted into flow rate of fluid.
Its magnetic field sensor assembly 5 two ends respectively are provided with a biasing magnet steel 3, this magnetic field sensor assembly 5 is placed near the wire 6 simultaneously, as shown in Figure 8, when the logical electric current of electric wire, sensor is without amplifying the signal that just can acquire 2～20mV/A, utilize the non-zero offset voltage characteristic volt gesture of sensor can design the precise current sensor, can obtain big range of dynamic measurement easily.
Claims (7)
1, a kind of passive solid magnetic field sensor, it is characterized in that magnetostriction element layer (1) and piezoelectric element layer (2) face one another magnetic field sensor unit of the compound composition of face, the compound overlappingly composition magnetic field sensor sets of several the sensor units part (5) is good with its two each compound magnetostriction element layers (1) of one deck piezoelectric element layer (2).
2, passive solid magnetic field sensor according to claim 1 is characterized in that magnetic field sensor assembly (5) one ends fix with the cantilever beam structure form.
3, passive solid magnetic field sensor according to claim 1, it is characterized in that magnetic field sensor assembly (5) one ends or two ends be fixed in permanent magnet (3) near.
4, passive solid magnetic field sensor according to claim 1 is characterized in that magnetic field sensor assembly (5) two ends or overall fixed.
5, passive solid magnetic field sensor according to claim 1 is characterized in that magnetic field sensor assembly (5) matches with magnetic driving wheel (4) or magnetic steel gear.
6, passive solid magnetic field sensor according to claim 1 is characterized in that magnetic field sensor assembly (5) matches with a magnetic impeller.
7, passive solid magnetic field sensor according to claim 1, it is characterized in that magnetic sensory package (5) be arranged at electric wire (6) near
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99239314 CN2385346Y (en) | 1999-08-18 | 1999-08-18 | Passive solid-state magnetic field sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99239314 CN2385346Y (en) | 1999-08-18 | 1999-08-18 | Passive solid-state magnetic field sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2385346Y true CN2385346Y (en) | 2000-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99239314 Expired - Lifetime CN2385346Y (en) | 1999-08-18 | 1999-08-18 | Passive solid-state magnetic field sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2385346Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100410669C (en) * | 2004-05-14 | 2008-08-13 | 欧阳南尼 | Current measurement method, electronic type current transformer utilized, and new application of the current transformer |
| CN101477182B (en) * | 2009-01-08 | 2011-04-13 | 上海交通大学 | Portable alternating field measuring instrument based on magnetostriction principle |
| CN101430369B (en) * | 2008-10-24 | 2011-06-01 | 江苏大学 | Self-generation wide-band laminated magnetic induced piezoelectric effect AC magnetic field sensor and production method thereof |
| CN101556861B (en) * | 2008-12-01 | 2011-09-28 | 魏孝铭 | Piezoelectric ceramic voltage dividing electronic potential transformer |
| CN101111771B (en) * | 2004-12-07 | 2011-11-16 | 霍尼韦尔国际公司 | Super invar magnetic return path for high performance accelerometers |
| CN103353583A (en) * | 2012-11-02 | 2013-10-16 | 国家纳米科学中心 | Magnetic field sensor |
| CN101286728B (en) * | 2008-05-28 | 2013-11-06 | 中国科学院上海硅酸盐研究所 | Energy exchanging device for magnetoelectric resonance |
| CN103983925A (en) * | 2014-06-03 | 2014-08-13 | 重庆材料研究院有限公司 | Magnetic field detection device based on magnetorheological elastomer |
| CN103983925B (en) * | 2014-06-03 | 2016-11-30 | 重庆材料研究院有限公司 | Field detecting device based on magnetic rheology elastic body |
| CN108152556A (en) * | 2018-01-18 | 2018-06-12 | 吉林大学 | It is passive to encourage the non-contact current sense measuring device of self-power wireless and measuring method |
| CN110470880A (en) * | 2019-09-17 | 2019-11-19 | 北京无线电测量研究所 | A kind of current sensor probe, preparation method and the sensor including it |
-
1999
- 1999-08-18 CN CN 99239314 patent/CN2385346Y/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100410669C (en) * | 2004-05-14 | 2008-08-13 | 欧阳南尼 | Current measurement method, electronic type current transformer utilized, and new application of the current transformer |
| CN101111771B (en) * | 2004-12-07 | 2011-11-16 | 霍尼韦尔国际公司 | Super invar magnetic return path for high performance accelerometers |
| CN101286728B (en) * | 2008-05-28 | 2013-11-06 | 中国科学院上海硅酸盐研究所 | Energy exchanging device for magnetoelectric resonance |
| CN101430369B (en) * | 2008-10-24 | 2011-06-01 | 江苏大学 | Self-generation wide-band laminated magnetic induced piezoelectric effect AC magnetic field sensor and production method thereof |
| CN101556861B (en) * | 2008-12-01 | 2011-09-28 | 魏孝铭 | Piezoelectric ceramic voltage dividing electronic potential transformer |
| CN101477182B (en) * | 2009-01-08 | 2011-04-13 | 上海交通大学 | Portable alternating field measuring instrument based on magnetostriction principle |
| CN103353583A (en) * | 2012-11-02 | 2013-10-16 | 国家纳米科学中心 | Magnetic field sensor |
| CN103983925A (en) * | 2014-06-03 | 2014-08-13 | 重庆材料研究院有限公司 | Magnetic field detection device based on magnetorheological elastomer |
| CN103983925B (en) * | 2014-06-03 | 2016-11-30 | 重庆材料研究院有限公司 | Field detecting device based on magnetic rheology elastic body |
| CN108152556A (en) * | 2018-01-18 | 2018-06-12 | 吉林大学 | It is passive to encourage the non-contact current sense measuring device of self-power wireless and measuring method |
| CN108152556B (en) * | 2018-01-18 | 2023-04-25 | 吉林大学 | Passive excitation self-powered wireless non-contact current sensing measurement device and measurement method |
| CN110470880A (en) * | 2019-09-17 | 2019-11-19 | 北京无线电测量研究所 | A kind of current sensor probe, preparation method and the sensor including it |
| CN110470880B (en) * | 2019-09-17 | 2021-09-10 | 北京无线电测量研究所 | Current sensor probe, preparation method thereof and sensor comprising current sensor probe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |