CN106872516A - Vacuum and permanent magnet magnetothermal effect measuring instrument - Google Patents
Vacuum and permanent magnet magnetothermal effect measuring instrument Download PDFInfo
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- CN106872516A CN106872516A CN201710203815.3A CN201710203815A CN106872516A CN 106872516 A CN106872516 A CN 106872516A CN 201710203815 A CN201710203815 A CN 201710203815A CN 106872516 A CN106872516 A CN 106872516A
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- vacuum
- vacuum chamber
- chamber cylinder
- measuring instrument
- permanent magnet
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The invention discloses a kind of vacuum and permanent magnet magnetothermal effect measuring instrument, including specimen holder, vacuum chamber, magnet, alternating temperature platform and temperature sensor；Vacuum chamber includes vacuum room cover, vacuum chamber cylinder, supporting table, and the bottom of vacuum chamber cylinder is connected to the top of supporting table, and vacuum room cover is connected to the top of vacuum chamber cylinder, and vacuum room cover is provided with sample rod through-hole；Vacuum chamber is provided with vacuum tube, and vacuum tube is connected with vacuum extractor；Specimen holder is arranged in sample rod through-hole, and keeps sealing；Magnet is arranged on the outside of vacuum chamber cylinder, and positioned at the bottom of vacuum chamber cylinder；Alternating temperature platform is arranged on the inside of vacuum chamber cylinder, and is fixed in supporting table；Temperature sensor is arranged on internal vacuum chamber, and external control system is connected by wire.Present invention measurement warm area is wide, disclosure satisfy that the adiabatic measurement request of magnetothermal effect, and temperature measurement accuracy is high.
Description
Technical field
The present invention relates to a kind of measuring instrument, specifically, it is related to a kind of vacuum and permanent magnet magnetothermal effect measuring instrument.
Background technology
Room temperature magnetic refrigerating is a kind of solid-state Refrigeration Technique, is to be expected to replace the new of traditional gas compression formula Refrigeration Technique
Refrigeration Technique.With the development of new material new technology, nearest more than ten years, room temperature magnetic refrigerating technological development is generally weighed by various countries
Depending on, and obtain incremental advances.This technology meets the requirements of the times of current sustainable development, it is considered to be one kind is hopeful to take
For the green refrigeration technology of conventional refrigeration technology.
Refrigerant used by room-temperature magnetic refrigerator is solid material, and the parameter for weighing material magnetic heating performance is isothermal magnetic entropy
Become and adiabatic temperature becomes, usual measuring method is divided into the direct method of measurement and the indirect method of measurement, the indirect method of measurement generally takes and surveys
Amount is relatively costly, and the direct method of measurement is quick and convenient, and measurement cost is low.
The patent document of the patent No. 200520008166.4, discloses a kind of permanent-magnet magnetothermal effect direct measuring instrument.
But the product comes with some shortcomings：1st, measurement warm area is narrower (- 30~50 DEG C)；2nd, do not possess adiabatic condition；3rd, temperature measurement accuracy is not
(being only able to display one decimal place) high.The presence of disadvantages described above has not adapted to wanting for current magnetic refrigerating material development need
Ask.
The content of the invention
Technical problem solved by the invention is to provide a kind of vacuum and permanent magnet magnetothermal effect measuring instrument, present invention measurement warm area
Extensively, the adiabatic measurement request of magnetothermal effect is disclosure satisfy that, and temperature measurement accuracy is high.
Technical scheme is as follows：
A kind of vacuum and permanent magnet magnetothermal effect measuring instrument, including specimen holder, vacuum chamber, magnet, alternating temperature platform and temperature sensor；
Vacuum chamber includes vacuum room cover, vacuum chamber cylinder, supporting table, and the bottom of vacuum chamber cylinder is connected to the top of supporting table, vacuum room cover
The top of vacuum chamber cylinder is connected to, vacuum room cover is provided with sample rod through-hole；Vacuum chamber is provided with vacuum tube, and vacuum tube is connected with to be taken out
Vacuum plant；Specimen holder is arranged in sample rod through-hole, and keeps sealing；Magnet is arranged on the outside of vacuum chamber cylinder, and is located at
The bottom of vacuum chamber cylinder；Alternating temperature platform is arranged on the inside of vacuum chamber cylinder, and is fixed in supporting table；Temperature sensor is arranged on very
Inside empty room, external control system is connected by wire.
Further：Vacuum chamber cylinder and supporting table are provided with fixed plate, and fixed plate is fixed on the top of supporting table, vacuum chamber cylinder
Bottom be connected to the top of fixed plate.
Further：Alternating temperature platform is provided with liquid nitrogen feedway and resistive heating device, and alternating temperature platform is added by liquid nitrogen and resistance
Hot combination temperature control, the temperature for producing sample to need, by temperature control instrument control.
Further：Specimen holder is provided with sample rod driving device, and sample rod driving device is used to lift specimen holder.
Further：Magnet is made up of Halbach array toroidal magnet.
Further：Temperature sensor uses thermometric piece.
Compared with prior art, the technology of the present invention effect includes：
1st, measurement warm area is wide.
Using liquid nitrogen and resistance heating combination temperature control, temperature control scope can reach -100~70 DEG C.
2nd, sample room uses vacuum cavity, sample is substantially at adiabatci condition, and the adiabatic measurement for meeting magnetothermal effect will
Ask.
3rd, temperature measurement accuracy is high.
Field system is combined using rare earth permanent magnet magnet Halbach array.Measuring and controlling temp uses high-precision meter, surveys
Warm precision is up to 0.01 degree.
Brief description of the drawings
Fig. 1 is the structural representation of vacuum and permanent magnet magnetothermal effect measuring instrument in the present invention.
Specific embodiment
Technical solution of the present invention is elaborated below with reference to example embodiment.However, example embodiment can
Implement in a variety of forms, and be not understood as limited to implementation method set forth herein；Conversely, thesing embodiments are provided so that
The design of example embodiment more comprehensively and completely, and is comprehensively conveyed to those skilled in the art by the present invention.
As shown in figure 1, being the structural representation of vacuum and permanent magnet magnetothermal effect measuring instrument in the present invention.
The structure of vacuum and permanent magnet magnetothermal effect measuring instrument includes：Specimen holder 1, vacuum chamber 2, magnet 3, alternating temperature platform 4, thermometric
Piece.
Vacuum chamber 2 includes：Vacuum room cover 21, vacuum chamber cylinder 22, fixed plate 23, supporting table 24；Fixed plate 23 is fixed on branch
The top of platform 24 is supportted, the bottom of vacuum chamber cylinder 22 is connected to the top of fixed plate 23, and vacuum room cover 21 is connected to vacuum chamber cylinder 22
Top, vacuum room cover 21 is provided with sample rod through-hole.Vacuum chamber 2 is provided with vacuum tube, and vacuum tube is connected with vacuum extractor,
In measurement process, vacuum extractor is used to keep the vacuum state inside vacuum chamber 2.Vacuum chamber 2 is in non-real when changing sample
Dummy status, opens vacuum room cover 21 and changes sample.
Specimen holder 1 is arranged in sample rod through-hole, and keeps sealing.Specimen holder 1 is provided with sample rod driving device, sample
Rod driving device is used to lift specimen holder 1.
Magnet 3 is arranged on the outside of vacuum chamber cylinder 22, and positioned at the bottom of vacuum chamber cylinder 22.Magnet 3 is by Halbach array
Toroidal magnet is constituted.
Alternating temperature platform 4 is arranged on the inside of vacuum chamber cylinder 22, and is fixed in supporting table 24.Alternating temperature platform 4 is provided with liquid nitrogen confession
To device and resistive heating device, alternating temperature platform 4 produces the temperature of sample needs by liquid nitrogen and resistance heating combination temperature control,
Controlled by high accuracy temperature control instrument.
Temperature sensor (using thermometric piece) is arranged on inside vacuum chamber 2, and external control system is connected by wire.Measurement
Process is automatically performed by computer program control.
The present invention is the instrument of direct measurement magnetothermal effect intensification or cooling value.By on programme-control specimen holder 1 during measurement
Lower movement, when magnetic field is passed in and out, by being pasted onto the temperature sensor collecting temperature changing value of sample surfaces, that is, measures magnetothermal effect
Value.
The application method of vacuum and permanent magnet magnetothermal effect measuring instrument is as follows：
1st, vacuum room cover 21 is opened, sample is fixed on the bottom of specimen holder 1, temperature sensor is pasted onto vacuum on sample
Chamber cap 21 is installed on vacuum chamber cylinder 22；
Temperature sensor uses Pt100.
2nd, start vacuum extractor, vacuumized to vacuum chamber 2, setting measurement parameter；
3rd, when needing to change sample temperature, sample rod driving device moves down specimen holder 1, makes sample and alternating temperature platform
4 contacts；
4th, after the temperature needed for sample reaches, sample rod driving device makes the rising of specimen holder 1 drive sample to remove alternating temperature platform
4, sample is in the magnetic field center of magnet 3；After after sample temperature stabilization, continue to rise specimen holder 1, sample is removed magnetic field；
During sample is moved up and down, in the presence of magnet 3, sample is magnetized or is demagnetized, produce magnetothermal effect.According to
Magnetothermal effect principle, magneto-caloric material can produce the phenomenon for heating up or lowering the temperature under the magnetic fields of change.
5th, sample demagnetization produces magnetothermal effect, is changed by temperature sensor collecting temperature thereon, obtains sample in setting
At a temperature of magnetothermal effect value.
6th, the change of alternating temperature platform 4 temperature is raised to next point for measuring temperature, repeats aforesaid operations process.Until measurement terminates.
Term used herein is explanation and exemplary and nonrestrictive term.Because the present invention can be with various
Form specific implementation without deviating from invention it is spiritual or substantive, it should therefore be appreciated that above-described embodiment be not limited to it is any foregoing
Details, and widely being explained in the spirit and scope that should be limited in appended claims, thus fall into claim or its etc.
Whole changes and remodeling in the range of effect all should be appended claims and covered.
Claims (6)
1. a kind of vacuum and permanent magnet magnetothermal effect measuring instrument, it is characterised in that：Including specimen holder, vacuum chamber, magnet, alternating temperature platform and temperature
Degree sensor；Vacuum chamber includes vacuum room cover, vacuum chamber cylinder, supporting table, and the bottom of vacuum chamber cylinder is connected to the top of supporting table,
Vacuum room cover is connected to the top of vacuum chamber cylinder, and vacuum room cover is provided with sample rod through-hole；Vacuum chamber is provided with vacuum tube, vacuum tube
It is connected with vacuum extractor；Specimen holder is arranged in sample rod through-hole, and keeps sealing；Magnet is arranged on the outer of vacuum chamber cylinder
Side, and positioned at the bottom of vacuum chamber cylinder；Alternating temperature platform is arranged on the inside of vacuum chamber cylinder, and is fixed in supporting table；TEMP
Device is arranged on internal vacuum chamber, and external control system is connected by wire.
2. vacuum and permanent magnet magnetothermal effect measuring instrument as claimed in claim 1, it is characterised in that：Vacuum chamber cylinder and supporting table are provided with
Fixed plate, fixed plate is fixed on the top of supporting table, and the bottom of vacuum chamber cylinder is connected to the top of fixed plate.
3. vacuum and permanent magnet magnetothermal effect measuring instrument as claimed in claim 1, it is characterised in that：Alternating temperature platform is provided with liquid nitrogen supply dress
Put and resistive heating device, alternating temperature platform is by liquid nitrogen and resistance heating combination temperature control, the temperature for producing sample to need, by controlling
Warm instrument control.
4. vacuum and permanent magnet magnetothermal effect measuring instrument as claimed in claim 1, it is characterised in that：Specimen holder is provided with specimen holder driving
Device, sample rod driving device is used to lift specimen holder.
5. vacuum and permanent magnet magnetothermal effect measuring instrument as claimed in claim 1, it is characterised in that：Magnet is by Halbach array annular
Magnet is constituted.
6. vacuum and permanent magnet magnetothermal effect measuring instrument as claimed in claim 1, it is characterised in that：Temperature sensor uses thermometric piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710203815.3A CN106872516A (en) | 2017-03-30 | 2017-03-30 | Vacuum and permanent magnet magnetothermal effect measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710203815.3A CN106872516A (en) | 2017-03-30 | 2017-03-30 | Vacuum and permanent magnet magnetothermal effect measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106872516A true CN106872516A (en) | 2017-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710203815.3A Pending CN106872516A (en) | 2017-03-30 | 2017-03-30 | Vacuum and permanent magnet magnetothermal effect measuring instrument |
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| CN (1) | CN106872516A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109991272A (en) * | 2019-04-08 | 2019-07-09 | 包头稀土研究院 | Magnetothermal effect measuring instrument temperature regulating device and temperature control method |
| CN109991273A (en) * | 2019-04-08 | 2019-07-09 | 包头稀土研究院 | Low temperature magnetothermal effect measuring instrument heat-transfer device |
| CN110146830A (en) * | 2019-04-08 | 2019-08-20 | 包头稀土研究院 | Low temperature magnetothermal effect measuring instrument samming heat-transfer device and temperature control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163177A (en) * | 2013-03-07 | 2013-06-19 | 包头稀土研究院 | Magnetothermal effect measurement system and method |
| CN105588958A (en) * | 2016-01-22 | 2016-05-18 | 中山大学 | Rapid multifunctional electronic component temperature characteristic measuring instrument and testing cavity |
| CN205643218U (en) * | 2016-03-28 | 2016-10-12 | 王利晨 | Can measure sample temperature's sample control rod |
| CN106442619A (en) * | 2016-10-31 | 2017-02-22 | 华南理工大学 | Dual-channel room-temperature direct measuring instrument and method for magnetocaloric effect |
-
2017
- 2017-03-30 CN CN201710203815.3A patent/CN106872516A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163177A (en) * | 2013-03-07 | 2013-06-19 | 包头稀土研究院 | Magnetothermal effect measurement system and method |
| CN105588958A (en) * | 2016-01-22 | 2016-05-18 | 中山大学 | Rapid multifunctional electronic component temperature characteristic measuring instrument and testing cavity |
| CN205643218U (en) * | 2016-03-28 | 2016-10-12 | 王利晨 | Can measure sample temperature's sample control rod |
| CN106442619A (en) * | 2016-10-31 | 2017-02-22 | 华南理工大学 | Dual-channel room-temperature direct measuring instrument and method for magnetocaloric effect |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109991272A (en) * | 2019-04-08 | 2019-07-09 | 包头稀土研究院 | Magnetothermal effect measuring instrument temperature regulating device and temperature control method |
| CN109991273A (en) * | 2019-04-08 | 2019-07-09 | 包头稀土研究院 | Low temperature magnetothermal effect measuring instrument heat-transfer device |
| CN110146830A (en) * | 2019-04-08 | 2019-08-20 | 包头稀土研究院 | Low temperature magnetothermal effect measuring instrument samming heat-transfer device and temperature control method |
| CN110146830B (en) * | 2019-04-08 | 2021-07-30 | 包头稀土研究院 | Temperature equalizing and conducting device for low-temperature magnetocaloric effect measuring instrument and temperature control method |
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Application publication date: 20170620 |
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