CN201600442U - Magnetic field sensor based on magnetic induction effect of amorphous ribbons - Google Patents
Magnetic field sensor based on magnetic induction effect of amorphous ribbons Download PDFInfo
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- CN201600442U CN201600442U CN2009202418312U CN200920241831U CN201600442U CN 201600442 U CN201600442 U CN 201600442U CN 2009202418312 U CN2009202418312 U CN 2009202418312U CN 200920241831 U CN200920241831 U CN 200920241831U CN 201600442 U CN201600442 U CN 201600442U
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Abstract
A magnetic field sensor based on a magnetic induction effect of amorphous thin ribbons is characterized in that a sine alternating-current signal generator is connected with an amorphous thin ribbon; the amorphous thin ribbon is connected with a peak detector; the peak detector is connected with an AD converter which is connected with a data display; and a self-induction coil and a bias coil are respectively wound on the amorphous thin ribbon. The magnetic field sensor has the advantages: (1) micro rare earth combined ferrous-based amorphous and nano-crystalline thin ribbons are not sensitive to stress changes, and influence of stress on the amorphous thin ribbon performance can be reduced in the processing process; (2) the magnetic field sensor just uses one self-induction coil and one bias coil, and selects low-frequency (about 30 kHz) sine alternating-current voltage, thereby the sensor is simple in structure and lower in cost; and (3) a bias magnetic field is axially added on the amorphous thin ribbons for adjusting working points of a magnetic core, and realizing measuring the size and the direction of the magnetic field within a small magnetic field range.
Description
Technical field
The utility model relates to a kind of magnetic field sensor, relates in particular to a kind of magnetic field sensor based on amorphous thin ribbon magnetic induction effect.
Background technology
Nineteen sixty, it is the strip of dozens of micron that professor Duwez of the U.S. has successfully made thickness with the technology of fast quenching chilling, and the amorphous soft-magnetic alloy of developing by this method has very excellent soft magnet performance.Magneto-impedance effect just found by Russian Harrison as far back as nineteen thirty-five, but since the restriction of material and application at that time do not arouse attention.The people such as Mohri of Japan Nagoya university in 1992 find: when diameter is that the CoFeSiB amorphous wire of 15-120 μ m is when passing to high-frequency current, very sensitive variation takes place with external magnetic field in the voltage magnitude of inducting in the silk two ends, and they call huge magnetoelectricity sense effect (Giant Magnet-inductive effect) to this phenomenon.Then, deliver successively about the huge magnetoelectricity sense in amorphous wire, amorphous ribbon and other the multiple material and the report of giant magnetoresistance effect.Result of study shows, when the frequency of AC driving electric current is hanged down (1-10kHz), skin effect is not obvious, and the resistive component in the impedance is subjected to the external magnetic field influence hardly, variation of AC voltage is mainly from the inductive component of filament, thereby at this moment is called huge magnetoelectricity sense effect.When the frequency of alternating current is higher (0.1-10M Hz), it is very important that skin effect becomes, and at this moment resistive component in the impedance and inductive component are subjected to the external magnetic field influence simultaneously, and are called giant magnetoresistance effect.Be called giant magnetoresistance effect (GiantMagneto-impedance effect), be called for short the GMI effect.
1994, the L.V.Panina of Japan, people such as Hispanic J.Velazquez and R.S.Beach find during with " exchanging giant magnetoresistance effect " mechanism in research " huge magnetoelectricity sense effect ", the two loss that is AC impedance (Z) in fact partly is that real part (R) is the result that imaginary part (X) changes with externally-applied magnetic field under different alternative frequencies with inductive part, and they have common classical electromagnetics origin.
Summary of the invention
The purpose of this utility model has been to provide a kind of magnetic field sensor based on amorphous thin ribbon magnetic induction effect, and this magnetic field sensor can be realized the magnetic-field measurement of any direction.
The utility model is achieved like this, it comprises sinusoidal ac signal generator, amorphous thin ribbon, peak detector, AD converter, digital indicator, it is characterized in that the sinusoidal ac signal generator connects amorphous thin ribbon, amorphous thin ribbon connects peak detector, peak detector connects AD converter, AD converter connects digital indicator, is wound with self-induction coil and bias coil on the amorphous thin ribbon respectively.
Amorphous thin ribbon described in the utility model is little rare earth iron-based amorphous nanometer crystalline strip.
Technique effect of the present utility model is: (1) little rare earth iron-based amorphous nanometer crystalline strip not only has high magnetic permeability, low coercive force and loss and good high frequency performance, little rare earth iron-based amorphous nanometer crystalline strip counter stress changes insensitive, and the stress that can reduce process is to the amorphous thin ribbon Effect on Performance; (2) only used a self-induction coil and bias coil, and selected low frequency (about 30kHz) sinusoidal voltage for use, made the simple in structure of sensor, cost is lower; (4) amorphous thin ribbon axially apply a bias magnetic field, be used for regulating the working point of magnetic core, be implemented in the size and Orientation of measuring magnetic field in the little magnetic field range.
Description of drawings
Fig. 1 is a functional-block diagram of the present utility model.
Fig. 2 is the circuit diagram of the utility model sinusoidal ac signal generator.
Fig. 3 is the circuit diagram of the utility model peak detector.
Fig. 4 is the circuit diagram of the utility model AD converter.
Fig. 5 is the circuit diagram of the utility model digital indicator.
Embodiment
As shown in Figure 1, the utility model is achieved like this, it comprises sinusoidal ac signal generator 1, amorphous thin ribbon 2, peak detector 3, AD converter 4, digital indicator 5, it is characterized in that sinusoidal ac signal generator 1 connects amorphous thin ribbon 2, amorphous thin ribbon 2 connects peak detector 3, peak detector 3 connects AD converter 4, and AD converter 4 connects digital indicator 5, is wound with self-induction coil and bias coil on the amorphous thin ribbon 2 respectively.
As shown in Figure 2, can change the amplitude and the frequency of sinusoidal signal by regulating RP1, RP2, export stable sinusoidal signal, this circuit is the square wave of exportable same frequency (R4), triangular wave (C18) also.
As shown in Figure 3, by two-stage calculation amplifier, obtain the crest voltage at coil two ends, error is in 5mv.
As shown in Figure 4, become digital signal (if digital conversion is that to be converted into binary number be that 0-8v converts 4 bits to as voltage the voltage transitions of simulating signal, its scope is 0000 to 1111 common 24=16, just be divided into 16 parts to 8, every part 0.5,0101=5*0.5v=2.5v, the P1^0 of circuit chips AD0804 to P1^7 with high-low level 0, the eight-digit binary number of 1 expression represent a voltage) so that single-chip microcomputer is handled and demonstration, more than eight exactly ceiling voltage is divided into 2
8=256 parts, voltage just is about 0.02v at 5v with interior precision.
As shown in Figure 5,10 to 17 ports of single-chip microcomputer STC89C52 receive the signal of the P1^0 of AD0804 to P1^7, exactly voltage signal is read in single-chip microcomputer, formula by match calculates corresponding value then, by 32 to 39 ports output high-low level (eight-digit binary number), enter LCD, demonstrate for numeral and character.
Claims (2)
1. magnetic field sensor based on amorphous thin ribbon magnetic induction effect, it comprises sinusoidal ac signal generator, amorphous thin ribbon, peak detector, AD converter, digital indicator, it is characterized in that the sinusoidal ac signal generator connects amorphous thin ribbon, amorphous thin ribbon connects peak detector, peak detector connects AD converter, AD converter connects digital indicator, is wound with self-induction coil and bias coil on the amorphous thin ribbon respectively.
2. a kind of magnetic field sensor based on amorphous thin ribbon magnetic induction effect according to claim 1 is characterized in that described amorphous thin ribbon is little rare earth iron-based amorphous nanometer crystalline strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202418312U CN201600442U (en) | 2009-12-22 | 2009-12-22 | Magnetic field sensor based on magnetic induction effect of amorphous ribbons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202418312U CN201600442U (en) | 2009-12-22 | 2009-12-22 | Magnetic field sensor based on magnetic induction effect of amorphous ribbons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201600442U true CN201600442U (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202418312U Expired - Fee Related CN201600442U (en) | 2009-12-22 | 2009-12-22 | Magnetic field sensor based on magnetic induction effect of amorphous ribbons |
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| CN (1) | CN201600442U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770621A (en) * | 2017-01-23 | 2017-05-31 | 复旦大学 | Glass fluxing technique silk detector |
| CN110598497A (en) * | 2019-09-16 | 2019-12-20 | 电子科技大学 | Long-distance passive wireless magnetic field quantity sensing label |
| CN112379315A (en) * | 2020-12-07 | 2021-02-19 | 青岛大学 | Weak direct-current magnetic field measuring method suitable for magnetoelectric coupling sensor |
| CN113834952A (en) * | 2021-09-23 | 2021-12-24 | 中国人民解放军国防科技大学 | Device and method for realizing object acceleration measurement based on amorphous wire GSI effect |
-
2009
- 2009-12-22 CN CN2009202418312U patent/CN201600442U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770621A (en) * | 2017-01-23 | 2017-05-31 | 复旦大学 | Glass fluxing technique silk detector |
| CN110598497A (en) * | 2019-09-16 | 2019-12-20 | 电子科技大学 | Long-distance passive wireless magnetic field quantity sensing label |
| CN112379315A (en) * | 2020-12-07 | 2021-02-19 | 青岛大学 | Weak direct-current magnetic field measuring method suitable for magnetoelectric coupling sensor |
| CN112379315B (en) * | 2020-12-07 | 2022-03-25 | 青岛大学 | Weak direct-current magnetic field measuring method suitable for magnetoelectric coupling sensor |
| CN113834952A (en) * | 2021-09-23 | 2021-12-24 | 中国人民解放军国防科技大学 | Device and method for realizing object acceleration measurement based on amorphous wire GSI effect |
| CN113834952B (en) * | 2021-09-23 | 2024-04-12 | 中国人民解放军国防科技大学 | Device and method for realizing object acceleration measurement based on amorphous wire GSI effect |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101006 Termination date: 20101222 |