CN111208456B - High-low temperature magnetic property measuring device for weak magnetic material - Google Patents
High-low temperature magnetic property measuring device for weak magnetic material Download PDFInfo
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- CN111208456B CN111208456B CN202010064389.1A CN202010064389A CN111208456B CN 111208456 B CN111208456 B CN 111208456B CN 202010064389 A CN202010064389 A CN 202010064389A CN 111208456 B CN111208456 B CN 111208456B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1223—Measuring permeability, i.e. permeameters
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Abstract
The invention discloses a device for measuring the high and low temperature magnetic performance of a weak magnetic material, which comprises at least two measuring modules, wherein each measuring module is internally provided with a measuring tube, all the measuring modules are arranged along the axial direction of the same measuring tube, all the measuring tubes are sequentially connected end to form a sample tube, the working temperature interval of the measuring tubes of the measuring modules arranged from one end to the other end of the sample tube is gradually increased, two ends of each measuring tube are respectively provided with an airtight valve, a strip-shaped sliding sample table is arranged in the sample tube, and the sliding sample table is in sliding fit with the inner wall of the sample tube. The invention has the beneficial effects that: the sample to be measured is fixed on the sliding sample table and is fed from any end of the sample tube, the sample tube is connected with the air supply device, the position of the sliding sample table on the sample tube is pushed and controlled through air flow, and magnetic performance parameters in a large temperature and wide range are obtained after the measurement of each temperature interval is completed by different measurement modules.
Description
Technical Field
The invention belongs to the field of magnetic measurement equipment, and particularly relates to a device for measuring the high and low temperature magnetic properties of a weak magnetic material.
Background
The magnetic performance of the weak magnetic material is generally measured according to the standard of GB/T35690 and 2017 measuring method of relative magnetic permeability of the weak magnetic material. In this standard, there are two measurement methods for the relative permeability of weak magnetic materials, namely a solenoid method and a magnetic moment method, wherein the solenoid method is a standard measurement method which requires that the aspect ratio of a sample to be tested is not less than 10: 1. The solenoid method has accurate test and simple device, but the common device only supports the measurement of the magnetic performance characteristic parameters of the weak magnetic material under the condition of normal temperature. However, the current weak magnetic materials have wide application range, and how the magnetic performance of the materials is changed from the magnetic performance of the materials under the normal temperature condition at different temperatures and different scenes cannot be determined. However, the change in magnetic properties may affect the performance of the device under low or high temperature conditions or even cause it to fail to function properly. The method has important significance for accurately measuring the high and low temperature magnetic properties of the weak magnetic material in basic research and engineering practice.
Patent document CN107479011A discloses a high and low temperature dynamic and static soft magnetic property measuring system, which is used for magnetic property test of soft magnetic material. Because the testing methods and sample requirements of the soft magnetic material and the weak magnetic material are different, the measuring system cannot be directly used for measuring the magnetic property of the weak magnetic material. The international market has company developed commercial magnetic property detection device, can test in certain temperature range, but the price is high, and the operation is complicated, is difficult to generally use widely. Therefore, it is necessary to develop a device for measuring the magnetic properties of the weak magnetic material at high and low temperatures, which has relatively low cost and is convenient to use.
Disclosure of Invention
In view of this, the present invention provides a device for measuring the high and low temperature magnetic properties of a weak magnetic material.
The technical scheme is as follows:
the device for measuring the high-low temperature magnetic performance of the weak magnetic material comprises at least two measuring modules, wherein each measuring module is internally provided with a measuring tube, all the measuring modules are arranged along the axial direction of the same measuring tube, and all the measuring tubes are sequentially connected end to form a sample tube;
the working temperature interval of the measuring tubes of the measuring modules arranged from one end to the other end of the sample tube is gradually increased;
two ends of each measuring tube are respectively provided with an airtight valve;
the sample tube is internally provided with a strip-shaped sliding sample table which is in sliding fit with the inner wall of the sample tube.
By adopting the design, a sample to be tested is fixed on the sliding sample table and is fed from any end of the sample tube, the sample tube is connected with the gas supply device, protective gas or inert gas is used for pushing the sliding sample table to reach the inside of the measuring tube of the measuring module close to the other end of the sample tube, then the temperature of the measuring tube is regulated to reach the testing temperature for magnetic property detection, after the measurement of one temperature interval is completed, reverse gas supply is carried out for pushing the sliding sample table to slide to the next adjacent measuring module for testing, the magnetic property of the material is tested in each temperature interval in sequence, and the magnetic property parameters of high and low temperatures in a wide range are obtained.
As a preferred technical scheme, a transfer pipe is connected between the close ends of two adjacent measuring pipes, and the inner diameter of the transfer pipe is the same as that of the measuring pipes.
Design more than adopting, both be convenient for survey the connection between the buret, the transmission slides the sample platform, separates the buret of surveying of two different operating temperature interval scopes again, reduces the temperature variation between two adjacent burets and disturbs.
As a preferable technical scheme, the pipe wall of the transfer pipe is transparent.
By adopting the design, the sliding sample table can be conveniently observed to enter the corresponding measuring tube, and the position of the sliding sample table in the sample tube can be confirmed.
Preferably, the transfer tube is a glass tube.
By adopting the design, the position of the sliding sample table is convenient to observe, and the heat insulation effect is achieved.
As a preferred technical scheme, two ends of the sample tube are respectively connected with a head tube.
By adopting the design, the air supply device is convenient to connect.
Preferably, the sliding sample stage includes two end blocks, the end blocks are fitted to the inner cavity of the sample tube, the two end blocks are disposed opposite to each other, and a sample-carrying stage is connected between the two end blocks.
By adopting the design, the end block is matched with the sample tube to play a role of a piston, so that the sample tube is driven to move by supplying air to the sample tube.
Preferably, the sample stage is provided with a sample groove having a semicircular arc-shaped cross section, and a center line of the sample groove coincides with a center line of the end block.
By adopting the design, the center line of the sample is positioned on the center line of the sample tube, and the requirement that the sample is positioned on the center line of the solenoid when the solenoid method is used for measurement is met.
Preferably, the end block is cylindrical, the end portions of the sample grooves extend to the corresponding end blocks, the end blocks are provided with engaging notches corresponding to the notches of the corresponding sample grooves, and the engaging notches are provided with engaging blocks.
By adopting the design, the sample can be conveniently and stably arranged on the sliding sample table.
As a preferred technical scheme, the number of the measuring modules is two, namely a low-temperature measuring module and a high-temperature measuring module;
the low-temperature measuring module comprises a low-temperature furnace, a measuring pipe of the low-temperature measuring module is a low-temperature measuring pipe, the low-temperature measuring pipe penetrates through the low-temperature furnace, and a first measuring coil and a first magnet exciting coil are sequentially arranged in the low-temperature furnace from inside to outside around the low-temperature measuring pipe;
the high temperature measurement module includes the high temperature furnace, the high temperature measurement module survey buret and be the high temperature survey buret, this high temperature survey buret runs through the high temperature furnace winds in this high temperature furnace high temperature survey buret is equipped with second measurement coil and second excitation coil from inside to outside in proper order.
By adopting the design, the structure is simple, the working temperature interval of the measuring pipe is divided into two, and the magnetic performance measurement between the low-temperature interval and the high-temperature interval is realized.
Compared with the prior art, the invention has the beneficial effects that: the sample to be measured is fixed on the sliding sample table and is fed from any end of the sample tube, the sample tube is connected with the air supply device, the position of the sliding sample table on the sample tube is pushed and controlled through air flow, and magnetic performance parameters of high and low temperatures are obtained after the measurement of each temperature interval is completed by different measurement modules.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a sliding specimen table;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a cross-sectional view taken at C-C of FIG. 3;
fig. 5 is a schematic view of the sample to be tested fixed on the sliding sample table under the view angle of fig. 3.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
As shown in FIG. 1, the device for measuring the high and low temperature magnetic performance of the weak magnetic material comprises at least two measuring modules, wherein each measuring module is internally provided with a measuring tube, all measuring modules are arranged along the same axial direction of the measuring tube, and all measuring tubes are sequentially connected end to form a sample tube 100. The operating temperature range of the measurement tubes of the measurement module, which are arranged from one end of the sample tube 100 to the other, is gradually increased. An elongated sliding sample table 200 is arranged in the sample tube 100, and the sliding sample table 200 is in sliding fit with the inner wall of the sample tube 100. Both ends of each of the measuring tubes are provided with airtight valves 150, respectively. Specifically, a circular hole is formed in the wall of the measurement tube, the airtight valve 150 is disposed in the circular hole, a through hole having the same diameter as that of the sample tube 100 penetrates through the airtight valve 150, and the sliding sample-carrying stage 200 is allowed to pass through when the airtight valve 150 is connected.
The two ends of the sample tube 100 are also connected with a terminal tube 140.
In this embodiment, there are two measurement modules, which are a low temperature measurement module and a high temperature measurement module respectively.
The low temperature measurement module includes low temperature stove 300, the survey buret of low temperature measurement module is low temperature survey buret 110, and this low temperature survey buret 110 runs through low temperature stove 300 winds in this low temperature stove 300 low temperature survey buret 110 is equipped with first measurement coil 301 and first excitation coil 302 from inside to outside in proper order.
The high temperature measurement module includes high temperature furnace 400, the high temperature measurement module survey buret and be high temperature survey buret 120, this high temperature survey buret 120 runs through high temperature furnace 400 winds in this high temperature furnace 400 high temperature survey buret 120 is equipped with second measurement coil 401 and second excitation coil 402 from inside to outside in proper order.
The structures of the low temperature furnace 300 and the high temperature furnace 400 may be the structures disclosed in patent document CN107479011A, but it is necessary to improve them to accommodate the installation of the measurement pipes.
For the low-temperature furnace 300, a low-temperature cylinder is arranged in the low-temperature furnace 300 to replace a low-temperature tank described in document CN107479011A, the low-temperature measuring tube 110 is arranged in the low-temperature cylinder in a penetrating manner, two ends of the low-temperature measuring tube 110 respectively penetrate out of two end plates of the low-temperature cylinder, tube walls of the low-temperature measuring tube 110 are respectively connected with the two end plates of the low-temperature cylinder in a sealing manner, a low-temperature liquid cavity is formed in an area between the tube wall of the measuring tube of the low-temperature measuring module and the inner wall of the low-temperature cylinder, low-temperature liquid such as liquid nitrogen is filled in the low-temperature liquid cavity to provide a low-temperature environment for the low-temperature measuring tube 110, and resistance wires are wound outside the low-temperature cylinder to adjust the temperature of the low-temperature measuring tube 110, wherein the temperature control manner is as described in document CN 107479011A. A first measuring coil 301 and a first excitation coil 302 are sequentially arranged in the low-temperature liquid cavity around the low-temperature cylinder from inside to outside.
In the high temperature furnace 400, a receiving cylinder is provided therein instead of the receiving groove described in the document CN 107479011A. A second heating coil wound into a hollow shape is arranged in the accommodating cylinder. A second measuring coil 401 and a second excitation coil 402 are sequentially arranged in the second heating coil from outside to inside, and the high-temperature measuring pipe 120 penetrates through the second measuring coil 401. The temperature control of the high temperature measuring tube 120 by the second heating coil is regulated in the manner described in document CN 107479011A.
The first measuring coil 301 and the first exciting coil 302, and the second measuring coil 401 and the second exciting coil 402 are further respectively connected with a measuring circuit specified by a solenoid method in the national standard GB/T35690-2017.
For assembly, a transfer pipe 130 is connected between the adjacent ends of two adjacent measuring pipes, and the transfer pipe 130 has the same inner diameter as the measuring pipes. The wall of the transfer tube 130 is transparent. Specifically, the transfer tube 130 is a glass tube. The transfer tube 130 is provided to separate adjacent two measurement tubes to reduce temperature transfer, and to facilitate viewing of the position of the sliding sample stage 200.
Specifically, as shown in fig. 2 to 5, the sliding sample stage 200 includes two end blocks 210, the end blocks 210 are fitted to the inner cavity of the sample tube 100, the two end blocks 210 are disposed opposite to each other, and a sample loading stage 220 is connected between the two end blocks. The end block 210 is a cylindrical piston. The sample stage 220 is provided with a sample groove 221 having a semicircular arc-shaped cross section, and a circular center line of the sample groove 221 coincides with a center line of the end block 210. The end portions of the sample slots 221 extend to the corresponding end blocks 210, the end blocks 210 are provided with engaging notches 211 corresponding to the notches of the sample slots 221, and engaging blocks 212 are disposed in the engaging notches 211.
In use, the sample cell 100 is connected to a gas supply which provides a protective gas such as nitrogen. The measurement procedure is as follows: fixing a bar-shaped sample s to the sample groove 221 of the sliding sample stage 200, and then putting the sliding sample stage 200 from one end (B end) of the sample tube 100 near the high temperature furnace 400; then, opening all the airtight valves 150, connecting a gas supply device with the end B of the sample tube 100, connecting one end (end A) of the sample tube 100 close to the low-temperature furnace 300 with a buffer airbag (not shown in the figure), driving the sliding sample table 200 to convey the sample tube to the end A of the sample tube 100 by ventilation, and then closing all the airtight valves 150, wherein the sample tube 100 is filled with protective gas; connecting an air supply device to the end A, connecting a buffer air bag to the end B of the sample tube 100, driving a sliding sample table 200 to enter the low-temperature measuring tube 110 by ventilation, closing the air supply device and the air-tight valve 150, controlling the temperature of the low-temperature furnace 300 to gradually rise, and measuring the magnetic property of the sample s at different temperature points; after the measurement is completed, the gas supply device and the airtight valve 150 are opened, then the sliding sample stage 200 is driven to enter the high temperature measurement tube 120 by ventilation, the gas supply device and the airtight valve 150 are closed, the temperature of the high temperature furnace 400 is controlled to gradually rise, and the magnetic properties of the sample s are measured at different temperature points. It is also possible to close the airtight valve 150 on the side of the high temperature measurement tube 120 close to the transfer tube 130, then connect the B-end of the sample tube to the vacuum pump for vacuum pumping, and close the airtight valve 150 on the B-end of the high temperature measurement tube 120 for measurement under vacuum.
After the measurement is completed, the airtight valve 150 is opened, and the gas supply device is operated to drive the sliding sample stage 200 to slide out of the sample tube 100. For convenient use, the gas supply device can be composed of a gas tank and a pressure reducing valve. Liquid nitrogen is used as low-temperature liquid for the low-temperature furnace 300, so that the working temperature range of the low-temperature measuring tube 110 is-196-25 ℃, and the working temperature range of the high-temperature measuring tube 120 is 25-300 ℃.
The low temperature furnace 300 may also be a low temperature experimental box and the high temperature furnace 400 may also be a high temperature experimental box.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (1)
1. The utility model provides a high low temperature magnetic property measuring device of weak magnetic material, includes measuring module, its characterized in that: the number of the measuring modules is two, each measuring module is internally provided with a measuring tube, all the measuring modules are arranged along the axial direction of the same measuring tube, and all the measuring tubes are sequentially connected end to form a sample tube (100);
the working temperature interval of the measuring tube of the measuring module arranged from one end of the sample tube (100) to the other end is gradually increased;
two ends of each measuring tube are respectively provided with an airtight valve (150);
a strip-shaped sliding sample table (200) is arranged in the sample tube (100), and the sliding sample table (200) is in sliding fit with the inner wall of the sample tube (100);
a transfer pipe (130) is connected between the close ends of two adjacent measuring pipes, and the inner diameter of the transfer pipe (130) is the same as that of the measuring pipes;
the wall of the transfer pipe (130) is transparent, and the transfer pipe (130) is a glass pipe; the sliding sample table (200) comprises two end blocks (210), the end blocks (210) are matched with the inner cavity of the sample tube (100), the two end blocks (210) are arranged oppositely, and a sample loading table (220) is connected between the two end blocks;
a sample groove (221) with a semicircular arc-shaped section is arranged on the sample carrying platform (220), and the circular center line of the sample groove (221) is superposed with the center line of the end block (210);
the end block (210) is a cylindrical piston, the end parts of the sample grooves (221) respectively extend to the corresponding end blocks (210), clamping notches (211) are respectively arranged on the end blocks (210) corresponding to the notches of the corresponding sample grooves (221), and clamping blocks (212) are arranged in the clamping notches (211);
two ends of the sample tube (100) are respectively connected with a head tube (140);
the measurement modules are respectively a low-temperature measurement module and a high-temperature measurement module;
the low-temperature measurement module comprises a low-temperature furnace (300), the measurement pipe of the low-temperature measurement module is a low-temperature measurement pipe (110), the low-temperature measurement pipe (110) penetrates through the low-temperature furnace (300), and a first measurement coil (301) and a first excitation coil (302) are sequentially arranged in the low-temperature furnace (300) around the low-temperature measurement pipe (110) from inside to outside;
the high temperature measurement module includes high temperature furnace (400), the high temperature measurement module survey buret and be high temperature survey buret (120), and this high temperature survey buret (120) run through high temperature furnace (400) wind in this high temperature furnace (400) high temperature survey buret (120) are equipped with second measurement coil (401) and second excitation coil (402) from inside to outside in proper order.
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| CN202010064389.1A CN111208456B (en) | 2020-01-20 | 2020-01-20 | High-low temperature magnetic property measuring device for weak magnetic material |
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| CN202010064389.1A CN111208456B (en) | 2020-01-20 | 2020-01-20 | High-low temperature magnetic property measuring device for weak magnetic material |
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| CN111208456A CN111208456A (en) | 2020-05-29 |
| CN111208456B true CN111208456B (en) | 2022-06-03 |
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| WO2001004646A1 (en) * | 1999-07-13 | 2001-01-18 | Los Alamos National Laboratory | Apparatus for measurement of critical current in superconductive tapes |
| CN201051137Y (en) * | 2007-06-29 | 2008-04-23 | 内蒙古科技大学 | Magnetism parameter measurement device for lanthanon permanent magnet |
| CN103744040A (en) * | 2014-01-02 | 2014-04-23 | 上海大学 | Measurement method for substance variable temperature magnetic susceptibility and measurement device thereof |
| 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 |
| CN109031169A (en) * | 2018-07-13 | 2018-12-18 | 江苏龙城精锻有限公司 | The adjustable pawl pole magnetic property non-destructive testing device of test temperature and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2690355Y (en) * | 2004-02-09 | 2005-04-06 | 银川东方运输设备有限公司 | Pneumatic pipeline transport device |
| GB2425610A (en) * | 2005-04-29 | 2006-11-01 | Univ London | Magnetic properties sensing system |
| WO2015009168A1 (en) * | 2013-07-19 | 2015-01-22 | Hts-110 Limited | Method and apparatus for testing magneto-optical hard disks |
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2020
- 2020-01-20 CN CN202010064389.1A patent/CN111208456B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114169U (en) * | 1992-03-04 | 1992-08-26 | 中国科学院物理研究所 | New-type magnetic measuring device of articles |
| WO2001004646A1 (en) * | 1999-07-13 | 2001-01-18 | Los Alamos National Laboratory | Apparatus for measurement of critical current in superconductive tapes |
| CN201051137Y (en) * | 2007-06-29 | 2008-04-23 | 内蒙古科技大学 | Magnetism parameter measurement device for lanthanon permanent magnet |
| CN103744040A (en) * | 2014-01-02 | 2014-04-23 | 上海大学 | Measurement method for substance variable temperature magnetic susceptibility and measurement device thereof |
| 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 |
| CN109031169A (en) * | 2018-07-13 | 2018-12-18 | 江苏龙城精锻有限公司 | The adjustable pawl pole magnetic property non-destructive testing device of test temperature and method |
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