CN102645642A - Temperature property testing device of amorphous metal fibers - Google Patents
Temperature property testing device of amorphous metal fibers Download PDFInfo
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- CN102645642A CN102645642A CN2012101571114A CN201210157111A CN102645642A CN 102645642 A CN102645642 A CN 102645642A CN 2012101571114 A CN2012101571114 A CN 2012101571114A CN 201210157111 A CN201210157111 A CN 201210157111A CN 102645642 A CN102645642 A CN 102645642A
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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 the temperature property test device.
Background technology
The micromechanism of amorphous metal fiber is the unordered and shortrange order attitude 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, special domain structure and skin effect characteristics such as (Skin Effect); Especially the remarkable giant magnetoresistance effect GMI (giant magneto-impedance) under the upper frequency obviously is superior to other types of material such as amorphous thin ribbon, thin magnetic film and electro-deposition composition fiber; So amorphous fiber is more suitable for as the GMI magneto-dependent sensor with the new 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 the varying environment temperature conditions; Its giant magnetoresistance effect changes noticeably (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 influence the 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 influences the job stability and the measuring accuracy of magneto-dependent sensor.Therefore, select suitably reasonably working sensor temperature range, set up the relevant temperature compensation, in the hope of satisfying the design of GMI magneto-dependent sensor integrated circuit and the development demand of high sensitivity, resolution and service precision to the temperature characterisitic of amorphous wire.
Because at present amorphous metal fiber temperature proving installation complex structure, temperature control out of true, thus influence magneto-dependent sensor development.
Summary of the invention
The objective of the invention is provides a kind of temperature property test device of amorphous metal fiber in order to solve present amorphous metal fiber temperature proving installation complex structure, the coarse problem of temperature control.
The temperature property test device of amorphous metal fiber, it is made up of accurate impedance test system, isoperibol generation systems and zero magnetic field correction system; Accurate impedance test system is made up of accurate electric impedance analyzer, Helmholtz coils and constant-current supply, and the isoperibol generation systems comprises constant temperature work box, temperature controller and liquid nitrogen storage tank; Said constant temperature work box is provided with liquid nitrogen import, liquid nitrogen outlet and conductor interface, and wherein liquid nitrogen outlet and conductor interface are arranged on the front of constant temperature work box, and the 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 the temperature output terminal of constant temperature work box; The temperature control output end of temperature controller is connected the temperature control input end of constant temperature work box, and accurate electric impedance analyzer is used for gathering the impedance of constant temperature work box amorphous fiber to be measured; Constant-current supply is used for providing work to use 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 among the present invention is the core of realizing the amorphous wire temperature property test, adopts more small-sized constant temperature oven to be easy to effective control of temperature, can improve control accuracy of temperature.The zero magnetic field correction system of flux-gate magnetometer can effectively avoid 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.
Description of drawings
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 the embodiment two, and Fig. 3 is amorphous wire impedance rate of change Δ Z/Z 0 ℃ time the in the 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 the in the 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 the in the 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: combine Fig. 1 that this embodiment is described, the temperature property test device of the said amorphous metal fiber of this embodiment, it is made up of accurate impedance test system, isoperibol generation systems and zero magnetic field correction system; Accurate impedance test system is made up of accurate electric impedance analyzer 2, Helmholtz coils 5 and constant-current supply 7, and the isoperibol generation systems comprises constant temperature work box 4, temperature controller 6 and liquid nitrogen storage tank 3; Said constant temperature work box 4 is provided with liquid nitrogen import 4-12, liquid nitrogen outlet 4-10 and conductor interface 4-11, and 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 the temperature output terminal of constant temperature work box 4; The temperature control output end of temperature controller 6 is connected the temperature control input end of constant temperature work box 4, and accurate electric impedance analyzer 2 is used for gathering the impedance of constant temperature work box 4 amorphous fiber 4-8 to be measured; Constant-current supply 7 is used for providing work to use 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.
At first regulate constant temperature work box 4 in the isoperibol generation systems, temperature controller 6 and liquid nitrogen storage tank 3 threes and realize the constant temperature test condition, temperature controller 6 can accurately be set and stable control steady temperature, and liquid nitrogen storage tank 3 can realize being lower than the environment temperature of room temperature; Carry out the interference that zero magnetic field correction reduces the external magnetic field subsequently and reach accurate measurement purpose; The probe of flux-gate magnetometer 1 is axially fixed at constant temperature work box 4 inner chambers and its along it axially with behind the axially parallel of Helmholtz coils 5 to be fixed; Adjust coil 5 positions more simultaneously; When the registration of flux-gate magnetometer 1 is 0.0GS, that coil is finally fixing; Signal wire with connection terminal 11 outputs inserts impedance test system at last, and the current value of regulating constant-current supply 7 will obtain corresponding external magnetic field value, thereby realizes the variation of magnetoimpedance characteristic under the 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 under the constant environment temperature.
Embodiment two: combine Fig. 2 that this embodiment is described; This embodiment is the further qualification to the temperature property test device of embodiment one said amorphous metal fiber; Constant temperature work box 4 comprises PCB test board 4-1, anti-protection 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 fiber 4-8 to be measured is arranged on the upper surface of PCB test board 4-1; Thermopair 4-6 is used to measure the temperature in the 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-deck bakelite plate to make, and the centre of said double-deck bakelite plate is filled with insulation material, and the bottom surface of the inner chamber body of casing 4-12 is respectively equipped with four root posts for four jiaos; The position of four jiaos of corresponding four root posts of PCB test board 4-1, anti-protection pad 4-2, copper cover plate 4-3, heating tank 4-4 and back up pad 4-5 all has through hole, and back up pad 4-5, heating tank 4-4, copper cover plate 4-3, anti-protection pad 4-2 and PCB test board 4-1 superpose in order and be socketed on four root posts from bottom to up successively through said through hole; Calandria 4-7 is arranged in the 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 loam cake 4-14 closely is enclosed in the opening part of casing 4-13.
Constant temperature work box among the present invention is the core of realizing the amorphous wire temperature property test; Wherein calandria 4-7 heats the amorphous metal fiber in the constant temperature work box 4; Thermopair 4-6 is transferred to temperature controller 6 after recording temperature; Temperature controller 6 can accurately be set and stable control steady temperature, adopts more small-sized constant temperature oven to be easy to effective control of temperature, can improve control accuracy of temperature.The zero magnetic field correction system of flux-gate magnetometer can effectively avoid the interference of external magnetic field and terrestrial magnetic field, improves measuring accuracy.
Embodiment three: this embodiment is that the constant temperature scope of said constant temperature work box 4 is to the further qualification of the temperature property test device of embodiment one said amorphous metal fiber :-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 temperature property test device of the said amorphous metal fiber of the comprehensive above-mentioned embodiment of this embodiment, in conjunction with concrete environment effect of the present invention is described.
Utilize the present invention that preparation attitude melt pull amorphous metal fiber is carried out behind the end plating Cu under different temperatures it is carried out the test of magnetoimpedance characteristic, the contrast_environment temperature is to maximum resistance variation rate [Δ Z/Z
0]
MaxInfluence with the 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 the 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, do not have obvious wave zone, stability is very high.After low external magnetic field (0Oe-2Oe) and the specific region of frequency in the 8MHz-15MHz scope carried out local grid amplification, also can find the grid continuous and even variation.
When temperature returned to room temperature (25 ℃), the output peak value of GMI slightly descended, Δ Z/Z
0Output image and local specific region grid all relatively evenly continuously, the ripple disable district, stability is higher.
When temperature is increased to 80 ℃; The fluctuation zone appears in the impedance rate of change curve of output; Above-mentioned specific region grid is carried out the part amplify the back discovery, when external magnetic field was 1.2Oe, mesh lines (8MHz-15MHz) in lower frequency range presents clear fluctuation to be changed; Explain that this moment, impedance output had instability, the output peak value of GMI decreases.
The diameter of melt pull amorphous metal fiber is in 10 μ m-90 mu m ranges.Amorphous fiber magnetoimpedance Performance Characteristics testing experiment under the condition of different temperatures and as sensitive material in magneto-dependent sensor during practical application; To connecting into pcb board behind the amorphous metal fiber end plating Cu; Carry out the giant magnetic impedance performance test, the electroplating technological parameter of being selected for use 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
ExThe time corresponding resistance value; Z (H
0) be the resistance value when not applying external magnetic field.The GMI performance test shows, under 25 ℃ of the 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, see 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 under the environment temperature of variation high-performance GMI magneto-dependent sensor to the performance requirement of sensitive material.
Claims (3)
1. the temperature property test device of amorphous metal fiber is characterized in that, it is made up of accurate impedance test system, isoperibol generation systems and zero magnetic field correction system; Accurate impedance test system is made up of accurate electric impedance analyzer (2), Helmholtz coils (5) and constant-current supply (7), and the isoperibol generation systems comprises constant temperature work box (4), temperature controller (6) and liquid nitrogen storage tank (3); Said constant temperature work box (4) is 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 the temperature output terminal of constant temperature work box (4); The temperature control output end of temperature controller (6) is connected the temperature control input end of constant temperature work box (4), and accurate electric impedance analyzer (2) is used for gathering the impedance of constant temperature work box (4) amorphous fiber to be measured (4-8); Constant-current supply (7) is used for providing work to use 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. according to the temperature property test device of the said amorphous metal fiber of claim 1; It is characterized in that; Constant temperature work box (4) comprises PCB test board (4-1), anti-protection 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 fiber to be measured (4-8) is arranged on the upper surface of PCB test board (4-1); Thermopair (4-6) is used to measure the temperature in the 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-deck bakelite plate to make; And the centre of said double-deck bakelite plate is filled with insulation material; The bottom surface of the inner chamber body of casing (4-12) is respectively equipped with four root posts for four jiaos, and the position of four jiaos of corresponding four root posts of PCB test board (4-1), anti-protection pad (4-2), copper cover plate (4-3), heating tank (4-4) and back up pad (4-5) all has through hole, and back up pad (4-5), heating tank (4-4), copper cover plate (4-3), anti-protection pad (4-2) and PCB test board (4-1) superpose in order and be socketed on four root posts from bottom to up successively through said through hole; Calandria (4-7) is arranged in the 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 loam cake (4-14) closely is enclosed in the opening part of casing (4-13).
3. according to the temperature property test device of the said amorphous metal fiber of claim 1, it is characterized in that the constant temperature scope of said constant temperature work box (4) is :-60 ℃-320 ℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104865540A (en) * | 2015-05-25 | 2015-08-26 | 内蒙古工业大学 | Stress-torsion magnetic impedance integration test device of metal fiber |
| CN106569151A (en) * | 2016-11-09 | 2017-04-19 | 曲靖师范学院 | System for testing electric-field regulation and control magnetic property of material and device under extreme condition |
| CN112415447A (en) * | 2020-11-03 | 2021-02-26 | 内蒙古工业大学 | High-frequency magnetic impedance testing device and method |
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| CN101118277A (en) * | 2007-08-24 | 2008-02-06 | 北京航空航天大学 | Magnetic striction material dynamic parameter testing system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865540A (en) * | 2015-05-25 | 2015-08-26 | 内蒙古工业大学 | Stress-torsion magnetic impedance integration test device of metal fiber |
| 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 |
| CN106569151A (en) * | 2016-11-09 | 2017-04-19 | 曲靖师范学院 | System for testing electric-field regulation and control magnetic property of material and device under extreme condition |
| 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 |
| CN112415447A (en) * | 2020-11-03 | 2021-02-26 | 内蒙古工业大学 | High-frequency magnetic impedance testing device and method |
| CN112415447B (en) * | 2020-11-03 | 2023-08-22 | 内蒙古工业大学 | High-frequency magnetic impedance testing device and method |
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