CN102645642B - Temperature property testing device of amorphous metal fibers - Google Patents
Temperature property testing device of amorphous metal fibers Download PDFInfo
- Publication number
- CN102645642B CN102645642B CN201210157111.4A CN201210157111A CN102645642B CN 102645642 B CN102645642 B CN 102645642B CN 201210157111 A CN201210157111 A CN 201210157111A CN 102645642 B CN102645642 B CN 102645642B
- Authority
- CN
- China
- Prior art keywords
- temperature
- constant
- work box
- constant temperature
- amorphous metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Magnetic Variables (AREA)
Abstract
The invention provides a temperature property testing device of an amorphous metal fiber, relates to the temperature property testing device, and solves the problems of the existing temperature property testing device of the amorphous metal fiber that the structure is complicated and the temperature control is inaccurate. The temperature property testing device of the amorphous metal fiber is composed of a precise impedance testing system, a constant-temperature environment generating system and a zero-magnetic-field correcting system, wherein the precise impedance testing system is composed of a precise impedance analyzer, Helmholtz coils and a constant-temperature power supply; the constant-temperature environment generating system comprises a constant-temperature working box, a temperature controller and a liquid nitrogen storage tank; the temperature controller is used for controlling a temperature in the constant-temperature working box to be constant; the precise impedance analyzer is used for measuring a resistance value of the amorphous metal fiber in the constant-temperature box and the constant-temperature power supply is used for supplying a constant-current source for the Helmholtz coils; a probe of a fluxgate magnetometer is arranged in an inner cavity of the constant-temperature working box, and the Helmholtz coils are fixed on two side faces of the constant-temperature working box. The temperature property testing device can obtain a temperature property of the detected amorphous metal fiber at a constant environmental temperature and the crystallization of a detected fiber microstructure is not easy to cause.
Description
Technical field
The present invention relates to new testing device for temperature properties.
Background technology
The micromechanism of amorphous metal fiber is the unordered and shortrange order state of long-range, and it has good geometrical symmetry, less magnetic hysteresis loss and coercive force, negative or near zero magnetostriction coefficient, high magnetic permeability, the features such as special domain structure and skin effect (Skin Effect), especially the remarkable giant magnetoresistance effect GMI (giant magneto-impedance) under upper frequency is obviously better than amorphous thin ribbon, other types of material such as thin magnetic film and electro-deposition composition fiber, therefore amorphous fiber is more suitable for as GMI magneto-dependent sensor with novel sensitive material (referring to V.Zhukova, M.Ipatov, A.Zhukov.Thin Magnetically Soft Wires for Magnetic Microsensors.Sensors.2009, 9:9216-9240.).The type sensitive material is under varying environment temperature conditions, its giant magnetoresistance effect is changed significantly (referring to H.Chiriac, C.S.Marines copper, T.-A.Ovari.Temperature Dependence of the Magneto-impedance Effect in Co-rich Amorphous Glass-covered Wires.Journal of Magnetism and Magnetic Materials, 2000,215-216:539-541.).Different temperature will directly affect GMI output stability simultaneously, and the minor fluctuations of impedance rate of change also will cause the great variety of signal processing circuit voltage signal, thereby affects job stability and the measuring accuracy of magneto-dependent sensor.Therefore, for the temperature characterisitic of amorphous wire, select suitably reasonably senor operating temperature scope, set up relevant temperature compensation, to meeting GMI magneto-dependent sensor design of integer electro-circuit and the development demand of high sensitivity, resolution and service precision.
Due at present amorphous metal fiber temperature proving installation complex structure, temperature control out of true, thus affect magneto-dependent sensor development.
Summary of the invention
The object of the invention is, in order to solve current amorphous metal fiber temperature proving installation complex structure, the coarse problem of temperature control, provides a kind of new testing device for temperature properties of amorphous metal fiber.
The new testing device for temperature properties of amorphous metal fiber, it is comprised of accurate impedance test system, isoperibol generation systems and zero magnetic field correction system; Accurate impedance test system is comprised of accurate electric impedance analyzer, Helmholtz coils and constant-current supply, and isoperibol generation systems comprises constant temperature work box, temperature controller and liquid nitrogen storage tank; On described constant temperature work box, be provided with liquid nitrogen import, liquid nitrogen outlet and conductor interface, wherein liquid nitrogen outlet and conductor interface are arranged on the front of constant temperature work box, and liquid nitrogen import is arranged on the back side of constant temperature work box; Zero magnetic field correction system adopts flux-gate magnetometer to realize, the liquid nitrogen output terminal of liquid nitrogen storage tank is communicated with the liquid nitrogen import of constant temperature work box, the temperature input end of temperature controller is connected to the temperature output terminal of constant temperature work box, the temperature control output end of temperature controller is connected to the temperature control input end of constant temperature work box, and accurate electric impedance analyzer is for gathering the impedance of constant temperature work box amorphous metal fiber to be measured; Constant-current supply is for providing work constant current source to Helmholtz coils, the probe of flux-gate magnetometer is arranged on the inner chamber of constant temperature work box, Helmholtz coils is fixed on two sides of constant temperature work box, and the probe axially parallel of flux-gate magnetometer in Helmholtz coils axially.
Constant temperature work box in the present invention is the core of realizing amorphous wire temperature property test, adopts the effective control that is easy to temperature compared with small-sized thermostat, can improve the control accuracy of temperature.The zero magnetic field correction system of flux-gate magnetometer can effectively be avoided the interference of external magnetic field and terrestrial magnetic field, improves measuring accuracy.The present invention compares simple and practical with existing temperature measuring equipment, temperature control is accurate, is difficult for causing the crystallization of fiber microstructure, can obtain the temperature characterisitic of constant environment temperature amorphous metal fiber.
Accompanying drawing explanation
Fig. 1 is the structural representation of duty of the present invention, and Fig. 2 is the structural representation of the constant temperature work box in embodiment two, and Fig. 3 is amorphous wire impedance rate of change Δ Z/Z 0 ℃ time in embodiment five
0output stability is with the three dimensional change curve synoptic diagram of external magnetic field (0Oe-4.2Oe) and excitation frequency scope (100kHz-15MHz), and Fig. 4 is amorphous wire impedance rate of change Δ Z/Z 25 ℃ time in embodiment five
0output stability is with the three dimensional change curve synoptic diagram of external magnetic field (0Oe-4.2Oe) and excitation frequency scope (100kHz-15MHz), and Fig. 5 is amorphous wire impedance rate of change Δ Z/Z 80 ℃ time in embodiment five
0output stability is with the three dimensional change curve synoptic diagram of external magnetic field (0Oe-4.2Oe) and excitation frequency scope (100kHz-15MHz).
Embodiment
Embodiment one: in conjunction with Fig. 1, present embodiment is described, the new testing device for temperature properties of amorphous metal fiber described in present embodiment, it is comprised of accurate impedance test system, isoperibol generation systems and zero magnetic field correction system; Accurate impedance test system is comprised of accurate electric impedance analyzer 2, Helmholtz coils 5 and constant-current supply 7, and isoperibol generation systems comprises constant temperature work box 4, temperature controller 6 and liquid nitrogen storage tank 3; On described constant temperature work box 4, be provided with liquid nitrogen import 4-12, liquid nitrogen outlet 4-10 and conductor interface 4-11, wherein liquid nitrogen outlet 4-10 and conductor interface 4-11 are arranged on the front of constant temperature work box 4, and liquid nitrogen import 4-12 is arranged on the back side of constant temperature work box 4; Zero magnetic field correction system adopts flux-gate magnetometer 1 to realize, the liquid nitrogen output terminal of liquid nitrogen storage tank 3 is communicated with the liquid nitrogen import 4-12 of constant temperature work box 4, the temperature input end of temperature controller 6 is connected to the temperature output terminal of constant temperature work box 4, the temperature control output end of temperature controller 6 is connected to the temperature control input end of constant temperature work box 4, and accurate electric impedance analyzer 2 is for gathering the impedance of constant temperature work box 4 amorphous metal fiber to be measured 4-8; Constant-current supply 7 is for providing work constant current source to Helmholtz coils 5, the probe of flux-gate magnetometer 1 is arranged on the inner chamber of constant temperature work box 4, Helmholtz coils 5 is fixed on two sides of constant temperature work box 4, and the probe axially parallel of flux-gate magnetometer 1 in Helmholtz coils 5 axially.
First in regulating thermostatic environment generation systems, constant temperature work box 4, temperature controller 6 and liquid nitrogen storage tank 3 threes realize constant temperature test condition, and temperature controller 6 can accurately be set with stable and control steady temperature, and liquid nitrogen storage tank 3 can be realized the environment temperature lower than room temperature; Carry out subsequently the interference that zero magnetic field correction reduces external magnetic field and reach accurate measurement object, the probe of flux-gate magnetometer 1 is axially fixed to constant temperature work box 4 inner chambers and its along it axially with after the axially parallel of Helmholtz coils 5 to be fixed, adjust again coil 5 positions simultaneously, when the registration of flux-gate magnetometer 1 is 0.0GS, coil is finally fixing; Finally, by the signal wire termination test macro of connection terminal 11 outputs, regulate the current value of constant-current supply 7 will obtain corresponding external magnetic field value, thereby realize the variation of magnetoimpedance characteristic at varying environment temperature.
Apparatus of the present invention are simple and practical, are difficult for causing the crystallization of fiber microstructure, can obtain the temperature characterisitic of amorphous metal fiber at constant environment temperature.
Embodiment two: in conjunction with Fig. 2, present embodiment is described, present embodiment is the further restriction to the new testing device for temperature properties of amorphous metal fiber described in embodiment one, and constant temperature work box 4 comprises PCB test board 4-1, protective pad 4-2, copper cover plate 4-3, heating tank 4-4, back up pad 4-5, thermopair 4-6, calandria 4-7, protective cover 4-9, casing 4-13 and box cover 4-14, amorphous metal fiber 4-8 to be measured is arranged on the upper surface of PCB test board 4-1, thermopair 4-6 is for measuring the temperature in heating tank 4-4, the output terminal of thermopair 4-6 is the temperature output terminal of constant temperature work box 4, the casing 4-13 of constant temperature work box 4 and box cover 4-14 adopt double-layer electric plank to make, and the centre of described double-layer electric plank is filled with insulation material, four jiaos of the bottom surfaces of the inner chamber body of casing 4-13 are respectively equipped with four root posts, PCB test board 4-1, protective pad 4-2, copper cover plate 4-3, the position of four jiaos of corresponding four root posts of heating tank 4-4 and back up pad 4-5 all has through hole, back up pad 4-5, heating tank 4-4, copper cover plate 4-3, protective pad 4-2 and PCB test board 4-1 superpose in turn, and be socketed in successively from bottom to up on four root posts by described through hole, calandria 4-7 is arranged in heating tank 4-4, and calandria 4-7 exit is the temperature control input end of constant temperature work box 4, protective cover 4-9 hides on the top of PCB test board 4-1, and upper cover 4-14 is closely enclosed in the opening part of casing 4-13.
Constant temperature work box in the present invention is the core of realizing amorphous wire temperature property test, wherein in constant temperature work box 4, calandria 4-7 heats amorphous metal fiber, thermopair 4-6 is transferred to temperature controller 6 after recording temperature, temperature controller 6 can accurately be set with stable and control steady temperature, employing is easy to effective control of temperature compared with small-sized thermostat, can improve the control accuracy of temperature.The zero magnetic field correction system of flux-gate magnetometer can effectively be avoided the interference of external magnetic field and terrestrial magnetic field, improves measuring accuracy.
Embodiment three: present embodiment is the further restriction to the new testing device for temperature properties of amorphous metal fiber described in embodiment one, and the constant temperature scope of described constant temperature work box 4 is :-60 ℃-320 ℃.
The present invention compares simple and practical with existing temperature measuring equipment, temperature control is accurate, is difficult for causing the crystallization of fiber microstructure, can obtain the temperature characterisitic of the interior amorphous metal fiber of constant environment temperature (60 ℃-320 ℃).
Embodiment four: the new testing device for temperature properties of amorphous metal fiber described in the comprehensive above-mentioned embodiment of present embodiment, illustrates effect of the present invention in conjunction with concrete environment.
Utilize the present invention to carry out it being carried out the test of magnetoimpedance characteristic under different temperatures after end plating Cu to preparation state melt pull amorphous metal fiber, contrast_environment temperature is to maximum resistance variation rate [Δ Z/Z
0]
maximpact with impedance output characteristics.Selected environment temperature is specially-40 ℃-120 ℃, and test frequency f is 0.1MHz-15MHz, and external magnetic field is 0-5Oe, and exciting current amplitude is 15mA.It is 0 ℃, 25 ℃ and 80 ℃ of impedance rate of change Δ Z/Z that Fig. 3, Fig. 4 and Fig. 5 are respectively environment temperature
0output stability is with the three dimensional change curve of external magnetic field (0Oe-4.2Oe) and excitation frequency scope (100kHz-15MHz).
When environment temperature is 0 ℃, Δ Z/Z
0output image evenly continuous, without obvious wave zone, stability is very high.To lower external magnetic field (0Oe-2Oe) and frequency, the specific region within the scope of 8MHz-15MHz carries out, after local grid amplification, also can finding grid continuous and even variation.
When temperature returns to room temperature (25 ℃), the output peak value of GMI slightly declines, Δ Z/Z
0output image and local specific region grid all relative evenly continuously, ripple disable district, stability is higher.
When temperature is increased to 80 ℃, there is fluctuation region in impedance rate of change curve of output, above-mentioned specific region grid is carried out after amplify part finding, when external magnetic field is 1.2Oe, mesh lines (8MHz-15MHz) in lower frequency range presents clear fluctuation to be changed, illustrate that now impedance output has instability, the output peak value of GMI decreases.
The diameter of melt pull amorphous metal fiber is within the scope of 10 μ m-90 μ m.Amorphous fiber magnetoimpedance Performance Characteristics testing experiment under condition of different temperatures and as sensitive material in magneto-dependent sensor during practical application, after being electroplated to Cu, amorphous metal fiber end connects into pcb board, carry out giant magnetic impedance performance test, selected electroplating technological parameter is: cathode-current density is 147.12A/dm
2, electroplating time is 45s, it is 4mm that fiber end is electroplated length.
The GMI magnetoimpedance performance of amorphous metal fiber should be by following formula quantitative evaluation in addition:
Impedance rate of change:
Magnetic responsiveness sensitivity:
Wherein, Z (H
ex) be external magnetic field H
extime corresponding resistance value; Z(H
0) be the resistance value while not applying external magnetic field.GMI performance test shows, at 25 ℃ of room temperatures, and [Δ Z/Z
0]
maxbe respectively 55.75% and 115.22%/Oe with magnetic responsiveness sensitivity ξ; In the time of 0 ℃ both be respectively 57.56%, 126.11%/Oe; In the time of 80 ℃ both be respectively 52.05%, 119.94%/Oe, in Table 1.
Amorphous metal fiber GMI performance comparison under table 1 condition of different temperatures
Therefore, the temperature characterisitic of research amorphous metal fiber more can be satisfied with the performance requirement of high-performance GMI magneto-dependent sensor to sensitive material under the environment temperature of variation.
Claims (3)
1. the new testing device for temperature properties of amorphous metal fiber, is characterized in that, it is comprised of accurate impedance test system, isoperibol generation systems and zero magnetic field correction system; Accurate impedance test system is comprised of accurate electric impedance analyzer (2), Helmholtz coils (5) and constant-current supply (7), and isoperibol generation systems comprises constant temperature work box (4), temperature controller (6) and liquid nitrogen storage tank (3); On described constant temperature work box (4), be provided with liquid nitrogen import (4-12), liquid nitrogen outlet (4-10) and conductor interface (4-11), wherein liquid nitrogen outlet (4-10) and conductor interface (4-11) are arranged on the front of constant temperature work box (4), and liquid nitrogen import (4-12) is arranged on the back side of constant temperature work box (4); Zero magnetic field correction system adopts flux-gate magnetometer (1) to realize, the liquid nitrogen output terminal of liquid nitrogen storage tank (3) is communicated with the liquid nitrogen import (4-12) of constant temperature work box (4), the temperature input end of temperature controller (6) is connected to the temperature output terminal of constant temperature work box (4), the temperature control output end of temperature controller (6) is connected to the temperature control input end of constant temperature work box (4), and accurate electric impedance analyzer (2) is for gathering the impedance of constant temperature work box (4) amorphous metal fiber to be measured (4-8); Constant-current supply (7) is for providing work constant current source to Helmholtz coils (5), the probe of flux-gate magnetometer (1) is arranged on the inner chamber of constant temperature work box (4), Helmholtz coils (5) is fixed on two sides of constant temperature work box (4), and the probe axially parallel of flux-gate magnetometer (1) in Helmholtz coils (5) axially.
2. the new testing device for temperature properties of amorphous metal fiber according to claim 1, is characterized in that, constant temperature work box (4) comprises PCB test board (4-1), protective pad (4-2), copper cover plate (4-3), heating tank (4-4), back up pad (4-5), thermopair (4-6), calandria (4-7), protective cover (4-9), casing (4-13) and box cover (4-14), amorphous metal fiber to be measured (4-8) is arranged on the upper surface of PCB test board (4-1), thermopair (4-6) is for measuring the temperature in heating tank (4-4), the output terminal of thermopair (4-6) is the temperature output terminal of constant temperature work box (4), the casing (4-13) of constant temperature work box (4) and box cover (4-14) adopt double-layer electric plank to make, and the centre of described double-layer electric plank is filled with insulation material, four jiaos of the bottom surfaces of the inner chamber body of casing (4-13) are respectively equipped with four root posts, PCB test board (4-1), protective pad (4-2), copper cover plate (4-3), the position of four jiaos of corresponding four root posts of heating tank (4-4) and back up pad (4-5) all has through hole, back up pad (4-5), heating tank (4-4), copper cover plate (4-3), protective pad (4-2) and PCB test board (4-1) superpose in turn, and be socketed in successively from bottom to up on four root posts by described through hole, calandria (4-7) is arranged in heating tank (4-4), and calandria (4-7) exit is the temperature control input end of constant temperature work box (4), protective cover (4-9) hides on the top of PCB test board (4-1), and upper cover (4-14) is closely enclosed in the opening part of casing (4-13).
3. the new testing device for temperature properties of amorphous metal fiber according to claim 1, is characterized in that, the constant temperature scope of described constant temperature work box (4) is :-60 ℃-320 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210157111.4A CN102645642B (en) | 2012-05-21 | 2012-05-21 | Temperature property testing device of amorphous metal fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210157111.4A CN102645642B (en) | 2012-05-21 | 2012-05-21 | Temperature property testing device of amorphous metal fibers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102645642A CN102645642A (en) | 2012-08-22 |
| CN102645642B true CN102645642B (en) | 2014-02-12 |
Family
ID=46658582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210157111.4A Active CN102645642B (en) | 2012-05-21 | 2012-05-21 | Temperature property testing device of amorphous metal fibers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102645642B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865540B (en) * | 2015-05-25 | 2017-10-10 | 内蒙古工业大学 | The stress twisted magnetic impedance synthesis test device of metallic fiber |
| CN106569151B (en) * | 2016-11-09 | 2019-04-05 | 曲靖师范学院 | Test material and the system of device electric fields regulation magnetic property under extreme condition |
| CN112415447B (en) * | 2020-11-03 | 2023-08-22 | 内蒙古工业大学 | High-frequency magnetic impedance testing device and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101118277B (en) * | 2007-08-24 | 2010-04-14 | 北京航空航天大学 | Magnetic striction material dynamic parameter testing system |
| CN101694477B (en) * | 2009-10-16 | 2012-11-28 | 重庆大学 | Experimental device of gas-sensitive temperature property test of carbon nano tube sensor and method |
-
2012
- 2012-05-21 CN CN201210157111.4A patent/CN102645642B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102645642A (en) | 2012-08-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ripka | Electric current sensors: a review | |
| CN107356800A (en) | The high-current detector and method of a kind of magnetic field cancellation | |
| CN103575960A (en) | Giant magnetoresistance effect current sensor | |
| CN103645369A (en) | Current sensing apparatus | |
| Cardelli et al. | Surface field measurements in vector characterization of Si-Fe magnetic steel samples | |
| CN105842635B (en) | Micro- magnetic probe excitation feedback based on linear extrapolation | |
| CN102645642B (en) | Temperature property testing device of amorphous metal fibers | |
| Asfour et al. | A high dynamic range GMI current sensor | |
| Si et al. | Magnetic field sensors based on the direct magneto-electric effect in hexaferrite thin films and the equivalent circuit model | |
| US9035648B2 (en) | Magnetic sensor characterization | |
| CN203535102U (en) | Colossal magnetoresistance effect current sensor | |
| McNeill et al. | High-fidelity low-cost electronic current sensor for utility power metering | |
| CN103364616B (en) | A kind of feedback-type Magnetic isolation DC current sensor | |
| CN101923152B (en) | Room temperature calibration method for equivalent error area of gradiometer | |
| Slobinsky et al. | Fast sweep-rate plastic Faraday force magnetometer with simultaneous sample temperature measurement | |
| CN110609163A (en) | Non-invasive current and voltage metering device | |
| CN109932670A (en) | Based on the closed loop TMR magnetic field measuring device for powering on set | |
| Pshenichnikov | A mutual-inductance bridge for analysis of magnetic fluids | |
| CN110967396B (en) | Giant magneto-impedance effect biomagnetic measuring device based on magnetic bead concentration and simulated lesion body shape | |
| Grandi et al. | Magnetic-field transducer based on closed-loop operation of magnetic sensors | |
| CN103901368A (en) | Magnetic parameter measuring device for magnetic materials | |
| CN114942663A (en) | Current source feedback circuit based on atomic magnetometer | |
| CN211698150U (en) | Helmholtz magnetic moment test coil capable of resisting fluctuation interference of far-end magnetic field | |
| CN212111561U (en) | Device current measuring device follows based on tunnel magnetic resistance chip | |
| CN114460505A (en) | Low-noise induction type magnetometer for weak alternating magnetic field magnitude transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |