CN102540114A - Device for measuring characteristics of ultra-magnetostrictive material under extremely low temperature environment - Google Patents
Device for measuring characteristics of ultra-magnetostrictive material under extremely low temperature environment Download PDFInfo
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- CN102540114A CN102540114A CN2011101462165A CN201110146216A CN102540114A CN 102540114 A CN102540114 A CN 102540114A CN 2011101462165 A CN2011101462165 A CN 2011101462165A CN 201110146216 A CN201110146216 A CN 201110146216A CN 102540114 A CN102540114 A CN 102540114A
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- magnetostrictive material
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Abstract
The invention provides a device for measuring characteristics of an ultra-magnetostrictive material under an extremely low temperature environment. The device comprises a driving coil, an ultra-magnetostrictive element to be measured, a low-temperature liquid nitrogen device and a pneumatic device, wherein the driving coil is used for generating a driving electromagnetic field, the low-temperature liquid nitrogen device is used for providing the extremely low temperature environment, and the pneumatic device is used for applying an pressure on the ultra-magnetostrictive element. The driving coil and the ultra-magnetostrictive element are arranged under the extremely low temperature environment of the Dewar liquid nitrogen device. A pressure sensor is arranged between the pneumatic device and the ultra-magnetostrictive element and is used for testing a pressure applied onto the ultra-magnetostrictive material; and a strain foil is adhered on the ultra-magnetostrictive element and is used for testing deformation amount of the ultra-magnetostrictive element. The device in the invention provides convenience for measurement of the characteristics of the ultra-magnetostrictive element under the extremely low temperature environment and breaks through the limitation on measurement of the characteristics of the ultra-magnetostrictive element at normal temperature in the prior art.
Description
Technical field
The present invention relates to a kind of material property measurement device, specifically refer to giant magnetostrictive material characteristic measuring device under a kind of extreme low temperature state.
Background technology
Giant magnetostrictive material as a kind of novel intellectual material military project and civilian aspect extraordinary application prospect is arranged, characteristics such as its strain value is big, electromechanical conversion efficiency is high, energy density is big, response speed is fast are used obtaining such as national defence, civil areas such as active damping device, high precision linear motor, fuel injection system, high power low-frequency sonar system, precision optical machinery controls widely.
A large amount of normal temperature experiments show that under static state, the characteristic of giant magnetostrictive material receives the influence of power-magnetic-many couplings of heat in itself; Dynamically down, the giant magnetostrictive material characteristic not only receives the influence of power-magnetic-many couplings of heat, and the frequency in magnetic field and amplitude also receive very big influence to its dynamic output characteristic.
For low temperature environment (liquid nitrogen temperature-196 ℃) dynamic test down, except U.S. NASA gave the correct time relevant report inner year in 1992, it is blank that otherwise report belongs to basically at present.For this reason, for the practical application and the future studies of this material, low-temperature dynamic power-magnetic-many coupling experiment researchs of heat are exactly an indispensable part.
At present, the main cause of the low-temperature dynamic research under the extreme ambient temperature is to be power-magnetic-many Coupled Dynamic experimental provisions of heat that are not suitable for liquid nitrogen extreme low temperature environment.Its difficult point is at the extreme low temperature environment, when realizing the drive coil operate as normal, will guarantee that also devices such as precompressed mechanism and low-temperature sensor test normally move, and these all have completely different with the normal temperature dynamic test.At present; We have designed power-magnetic-many coupling experiment devices of heat that are applicable under the liquid nitrogen extreme low temperature environment; Comprise liquid nitrogen extreme low temperature environmental device, precompressed mechanism, drive coil, magnetic circuit is optimized structure and low-temperature sensor; Mainly overcome under the liquid nitrogen extreme low temperature environment, guarantee the operate as normal of drive coil, precompressed mechanism and low-temperature sensor, thereby realize the Research on Dynamic Characteristic of power-magnetic-heat many couplings of giant magnetostrictive material under the liquid nitrogen cryogenics environment; Its purpose mainly solves the basic key scientific problems of giant magnetostrictive material under the extreme low temperature environment, for practical application lays the foundation.
Summary of the invention
The present invention aims to provide giant magnetostrictive material characteristic measuring device under a kind of extreme low temperature state, and in order to realize the foregoing invention purpose, the technical scheme that is adopted is: giant magnetostrictive material characteristic measuring device under the extreme low temperature state mainly comprises:
Drive coil can generate driving magnetic field after the energising;
Supermagnetic device takes place flexible under said driving magnetic field;
Pneumatic shuttle contacts with the magnetostriction element top, and the pressure that utilizes air to form imposes on magnetostriction materials to obtain prestress;
The Dewar liquid nitrogen plan is used to create the extreme low temperature environment;
Pick-up unit is used to detect the prestress and the driving magnetic field size of supermagnetic device deflection, supermagnetic device;
Supporting seat is close to the top of pneumatic shuttle, is used for fixing the height at pneumatic shuttle top;
Wherein, said drive coil and magnetostriction element place the Dewar liquid nitrogen plan that LIN is housed;
Epoxy plate is stamped in described Dewar liquid nitrogen plan top, and the hollow part of Dewar bottom of device is provided with supporting base.
The making material of described Dewar liquid nitrogen plan is a magnetism-free stainless steel.
Described pneumatic shuttle comprises corrugated tube, the magnetism-free stainless steel right cylinder of an end opening, and described corrugated tube tips upside down on cylindrical top, and seals with the right cylinder argon arc welding, and the sealing back forms a cavity; Have inflation inlet on corrugated tube or the cylindrical sidewall, so that in cavity, pour gas; Described right cylinder bottom surface is provided with groove, and the size of groove is consistent with the size and the shape of the end of giant magnetostrictive material with shape
The two ends of described supermagnetic device are connected with respectively leads rod, and the rod of leading of supermagnetic device upper end is embedded in the groove of said pneumatic shuttle.
Described pick-up unit comprises the groove of pneumatic shuttle and leads the diaphragm pressure sensor of installing between the rod, the low temperature Hall probe that is attached to the foil gauge on ultra-magnetic telescopic original paper surface and is used to detect driving magnetic field intensity.
Of the present invention giant magnetostrictive material characteristic measuring device under the extreme low temperature state is provided; Utilize LIN to create the extreme low temperature environment; Dewar double-layer vacuum spacer assembly is good attemperator, and LIN is positioned in the middle of the Dewar type container, can make LIN keep ultralow temperature.The pressue device utilization be gas boosting; Utilize air pressure to give the giant magnetostrictive material certain pressure; To obtain the prestress of ultra-magnetic telescopic original paper; The pressure that utilizes pressure transducer to measure giant magnetostrictive material to receive, utilize foil gauge to measure the deflection that the ultra-magnetic telescopic original paper produces, utilize low temperature Hall to pop one's head in and measure the magnetic field intensity that drive coil produces.
The invention provides under a kind of ultra-low temperature surroundings, the giant magnetostrictive material characteristic measuring device has been broken through scientific and technological blank.Conventional measurement and measurement mechanism all carry out under normal temperature environment, and the specific of the giant magnetostrictive material of measurement all is the characteristic that shows under the normal temperature environment, still belong to blank about the characteristic of giant magnetostrictive material under the ultra-low temperature surroundings.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of instructions, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of giant magnetostrictive material characteristic measuring device under the extreme low temperature state;
Fig. 2 is the structural representation of pneumatic shuttle in the giant magnetostrictive material characteristic measuring device under the extreme low temperature state;
Fig. 3 is a Dewar liquid nitrogen plan structural representation in the giant magnetostrictive material characteristic measuring device under the extreme low temperature state;
Fig. 4 is giant magnetostrictive material characteristic measuring device drive coil and a supermagnetic device structural representation under the extreme low temperature state.
In conjunction with accompanying drawing, Reference numeral is following in the embodiment of the invention:
11-magnetism-free stainless steel right cylinder, 12-corrugated tube, 13-cavity, 15-air pressure input port, 16-air compressor; The 17-groove, 21-pressure-bearing Dewar flask, 22-epoxy plate, 23-Dewar liquid nitrogen storage vessel; 24-pressure-bearing supporting seat, 31-leads rod, the last magnetic conductor of 32-, 33-supermagnetic device; Magnetic conductor under the 35-, 36-drive coil, 41-upper branching holder, 42-lower support seat.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
As shown in Figure 1, present embodiment provide a kind of under the extreme low temperature environment measurement mechanism of giant magnetostrictive material characteristic.Mainly comprise: drive coil, supermagnetic device, pneumatic shuttle, Dewar liquid nitrogen plan, pick-up unit and supporting seat.
Wherein, the Dewar liquid nitrogen plan is made up of two parts: the one, and Dewar liquid nitrogen storage vessel 23, the upper end is added with seal, through pressurization, with the liquid nitrogen that is stored in the liquid nitrogen container, is input in the pressure-bearing Dewar device; The 2nd, pressure-bearing Dewar flask 21, i.e. double-layer vacuum cool-bag, general Dewar type container design; As long as double-layer vacuum can be arranged, just can reach heat preservation effect, the bearing requirements for container neither be very high simultaneously; But requirement of experiment for the test of giant magnetostrictive material low-temperature dynamic; One is that the selected materials of making Dewar type container can not exert an influence to the environmental magnetic field uniformity coefficient, and another is the power that the double-layer vacuum container bottom will bear maximum 8400N (ox), and this is key a bit; Existing common Dewar type container, vacuum double structure all can not bear big pressure very.If the container pressurized, and surpass the pressure that bears, can produce distortion to Dewar type container, lose the function of insulation, container can directly destroy when serious.
The pressure-bearing Dewar flask is made by the magnetism-free stainless steel of high-quality, and the rigidity of material own is higher, in bottom centre internal cavities position, increases the pressure-bearing supporting seat 24 between the two-layer evacuated panel, and simultaneously, the Dewar type container top has epoxy plate to cover, and reduces the volatilization of liquid nitrogen.Through the reality test, after container was full of liquid nitrogen, this container can keep 1.5 hours low temperature environment, thereby guaranteed the experiment test under low temperature environment.
Drive coil adopts copper conductor as the drive coil lead, does coil rack with bakelite.After the drive coil energising, around drive coil, produce and drive electromagnetic field, form the electromagnetic field environment.
Above-mentioned pneumatic shuttle is divided into two unit, and one is pneumatic shuttle, selects corrugated tube, non-magnetic rustproof steel sheet and magnetism-free stainless steel right cylinder for use; Selected material can not exert an influence to magnetic field, more respectively on request; Be worked into required size; Adopt argon arc welding that the three is welded as an airtight container, carry out the input of gas through air compressor, its output pressure is 46MPa to the maximum; Another is an air compressor, and air pressure is provided, and at air compressor and pneumatic shuttle indirect constant-voltage meter and three-way valve is arranged, and makes the air pressure that pours in the pneumatic shuttle remain on constant, promptly constant precompression.
The drive coil and the ultra-magnetic telescopic original paper that adopt copper conductor to make are placed in the liquid nitrogen vessel in the lump; Giant magnetostrictive material posts the low temperature foil gauge; The giant magnetostrictive material upper/lower terminal has high-permeability material simultaneously; Can make the specimen supermagnetic device be in the drive coil centre position, and its magnetic field is comparatively even.The supermagnetic device upper end has output to lead rod, and the upper end of leading rod withstands in the groove of air pressure loading device, leads between rod and the groove and is furnished with heat-barrier material, and it is unaffected with the heat conduction of leading rod to separate air pressure loading device.Lead and also be furnished with pressure transducer between rod and the groove, be used for the test pressure size.
Adjustable positions between the upper and lower fixed support of whole device, the upper and lower support pedestal that is provided with of device can be regulated according to the giant magnetostrictive material size of selecting for use.After the experiment assembling is accomplished, just can carry out pressure-loaded, power drives, low-temperature dynamic data acquisition.
Under the liquid nitrogen extreme ambient temperature, power-magnetic-many couplings of heat complex environment extreme low temperature dynamic apparatus can be accomplished following content measurement:
1) when bias magnetic field, different prestress are arranged, the complex relationship of input current and driving magnetic field, MATERIALS ' DYNAMIC strain, material magnetic induction density under the different frequency; The relation of input current and driving magnetic field, MATERIALS ' DYNAMIC strain, material magnetic induction density and temperature variation under the same frequency;
2) when no bias magnetic field, different prestress, complex relationships such as input current and driving magnetic field, MATERIALS ' DYNAMIC strain, material magnetic induction density under the different frequency; Complex relationships such as input current and driving magnetic field, MATERIALS ' DYNAMIC strain, magnetic induction density under the same frequency;
3) this device can realize that also The quasi-static characteristics measures: promptly exciting current becomes forward stepwise by negative sense and changes from small to big and feed drive coil and produce magnetic field; Can test when no prestress drive coil input current and magnetic field dependence test, drive coil input current and material strain relation test, drive coil input current and magnetic induction density relation test; When precompression is arranged, more than all content measurements.
What should explain at last is: the above is merely the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. giant magnetostrictive material characteristic measuring device under the extreme low temperature state is characterized in that, mainly comprises:
Drive coil can generate driving magnetic field after the energising;
Supermagnetic device takes place flexible under said driving magnetic field;
Pneumatic shuttle contacts with the magnetostriction element top, and the pressure that utilizes air to form imposes on magnetostriction materials to obtain prestress;
The Dewar liquid nitrogen plan is used to create the extreme low temperature environment;
Pick-up unit is used to detect the prestress and the driving magnetic field size of supermagnetic device deflection, supermagnetic device;
Supporting seat is close to the top of pneumatic shuttle, is used for fixing the height at pneumatic shuttle top;
Wherein, said drive coil and magnetostriction element place the Dewar liquid nitrogen plan that LIN is housed.
2. giant magnetostrictive material characteristic measuring device under the extreme low temperature state according to claim 1 is characterized in that, epoxy plate is stamped in described Dewar liquid nitrogen plan top, and the hollow part of Dewar bottom of device is provided with supporting base.
3. giant magnetostrictive material characteristic measuring device under the extreme low temperature state according to claim 2 is characterized in that, the making material of described Dewar liquid nitrogen plan is a magnetism-free stainless steel.
4. giant magnetostrictive material characteristic measuring device under the extreme low temperature state according to claim 1; It is characterized in that; Described pneumatic shuttle comprises corrugated tube, the magnetism-free stainless steel right cylinder of an end opening; Described corrugated tube tips upside down on cylindrical top, and seals with the right cylinder argon arc welding, and the sealing back forms a cavity; Have inflation inlet on corrugated tube or the cylindrical sidewall, so that in cavity, pour gas; Described right cylinder bottom surface is provided with a groove, and the size of groove is consistent with the size and the shape of the end of giant magnetostrictive material with shape.
5. giant magnetostrictive material characteristic measuring device under the extreme low temperature state according to claim 4; It is characterized in that; With to lead rod inconsistent, the rod of conflicting in supermagnetic device upper end of leading is embedded in the groove of said pneumatic shuttle respectively at the two ends of described supermagnetic device.
6. giant magnetostrictive material characteristic measuring device under the extreme low temperature state according to claim 4; It is characterized in that described pick-up unit comprises the groove of pneumatic shuttle and leads the diaphragm pressure sensor of installing between the rod, the low temperature Hall probe that is attached to the foil gauge on ultra-magnetic telescopic original paper surface and is used to detect driving magnetic field intensity.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062610A (en) * | 2014-06-11 | 2014-09-24 | 温州大学 | Device and methods for detecting magnetic property of magnetostriction material |
| CN106526375A (en) * | 2016-10-28 | 2017-03-22 | 桂林理工大学 | Electrical insulation film pulse voltage accelerated aging experiment electromagnetic acting force generating device |
| CN107359809A (en) * | 2017-06-27 | 2017-11-17 | 西安电子科技大学 | Low temperature smart active member |
| CN110286341A (en) * | 2019-06-14 | 2019-09-27 | 兰州大学 | Giant magnetostrictive material power magnetic characteristic measuring device under a kind of ultralow temperature |
| CN114236438A (en) * | 2021-12-20 | 2022-03-25 | 中国石油大学(华东) | Measuring device and measuring method for magnetic parameters of giant magnetostrictive material |
| CN110286341B (en) * | 2019-06-14 | 2024-05-10 | 兰州大学 | Super magnetostriction material force magnetic characteristic measuring device under ultralow temperature |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104062610A (en) * | 2014-06-11 | 2014-09-24 | 温州大学 | Device and methods for detecting magnetic property of magnetostriction material |
| CN104062610B (en) * | 2014-06-11 | 2017-01-04 | 温州大学 | The magnetic characteristic test device of magnetostriction materials and detection method |
| CN106526375A (en) * | 2016-10-28 | 2017-03-22 | 桂林理工大学 | Electrical insulation film pulse voltage accelerated aging experiment electromagnetic acting force generating device |
| CN106526375B (en) * | 2016-10-28 | 2023-04-07 | 桂林理工大学 | Electromagnetic acting force generating device for electrical insulation film pulse voltage accelerated aging experiment |
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| CN110286341A (en) * | 2019-06-14 | 2019-09-27 | 兰州大学 | Giant magnetostrictive material power magnetic characteristic measuring device under a kind of ultralow temperature |
| CN110286341B (en) * | 2019-06-14 | 2024-05-10 | 兰州大学 | Super magnetostriction material force magnetic characteristic measuring device under ultralow temperature |
| CN114236438A (en) * | 2021-12-20 | 2022-03-25 | 中国石油大学(华东) | Measuring device and measuring method for magnetic parameters of giant magnetostrictive material |
| WO2023115671A1 (en) * | 2021-12-20 | 2023-06-29 | 中国石油大学(华东) | Device and method for measuring magnetic parameter of giant magnetostrictive material |
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