CN107479011B - High/low temperature sound state soft magnetic characteristic measuring system - Google Patents
High/low temperature sound state soft magnetic characteristic measuring system Download PDFInfo
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- CN107479011B CN107479011B CN201710600862.1A CN201710600862A CN107479011B CN 107479011 B CN107479011 B CN 107479011B CN 201710600862 A CN201710600862 A CN 201710600862A CN 107479011 B CN107479011 B CN 107479011B
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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
- G01R33/14—Measuring or plotting hysteresis curves
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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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- 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
- G01R33/123—Measuring loss due to hysteresis
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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
- G01R33/16—Measuring susceptibility
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- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
It includes soft magnetism direct-current measuring device, soft magnetism alternating-current measuring device, function translator, high temperature furnace and low temperature oven that the present invention, which provides a kind of high/low temperature sound state soft magnetic characteristic measuring system provided by the invention,；Standard ring is suspended in high temperature furnace or low temperature oven, and magnetizing coil and measuring coil are wound on standard ring, and the both ends of magnetizing coil and the both ends of measuring coil are respectively connected to soft magnetism direct-current measuring device and soft magnetism alternating-current measuring device；It is provided in high temperature furnace and turns to hollow heating coil, heating coil is electrically connected by conducting wire and high temperature furnace control cabinet；It is provided with low temperature filling in low temperature oven, has been filled with liquid nitrogen in low temperature filling, resistance wire is wound on the outer wall that low temperature fills, resistance wire is electrically connected by conducting wire and low temperature oven control cabinet；Function translator is for switching high temperature furnace and low temperature oven, DC excitation power and ac excitation power supply.The present invention can be realized the low temperature to standard ring, high temperature, dynamic, static soft magnet performance measurement.
Description
Technical field
The present invention relates to soft magnetic materials field of measuring technique, more specifically, it is special to be related to a kind of high/low temperature sound state soft magnetism
Property measuring system.
Background technique
It is higher and higher to the performance requirement of material with the rapid development of China's space flight and aviation cause, especially to using
The requirement of magnetic material in space flight and aviation precise control system is also increasingly stringenter, and is especially known for sure in advance one
It is particularly important to determine the rule that the magnetic characteristic index of the soft magnetic materials applied under temperature environment varies with temperature, considers convenient for designer
Environment temperature just can ensure that the accurate control of aerospace craft, so that it is guaranteed that space flight is navigated to the influence factor of the magnetic property of soft magnetism
The reliability service of pocket.It is required that the measurement method used meets national standard soft magnetic materials: national standard GBT13012-2008_ soft magnetic materials
The measurement method standard of DC magnetic energy and the measurement side of national standard GBT 3658-2008 soft magnetic materials AC magnetic ring specimen
While method standard, while realizing the magnetic property characterisitic parameter room temperature precise measurement to soft magnetic materials, also correspondence is required to be used in
Soft magnetic materials in low temperature and hot environment carries out the accurate measurement under high temperature and low temperature.
There are two types of general to the measurement of soft magnetic materials at present, shock measurement method and vibration magnetometer survey method.Impact
Mensuration: " MATS-2010SD soft magnetism direct-current measuring device (containing DC excitation power) and " MATS-2010SA are now generally used
Soft magnetism alternating-current measuring device " (contains ac excitation power supply), both measuring devices need for soft magnetic materials to be made into standard ring, this
Device is cheap, can react the overall performance of soft magnetic materials, and test is accurate, but can only independently carry out room temperature measurement at present,
It not can be carried out low temperature and high temperature measurement.Vibrating example mensuration: U.S.'s quantum Quantum Design company and Britain in the world
Cryogenic company is all made of vibration magnetometer survey method, and instrument includes the synthesis physical measurement of Airoam, U.S. production
System and magnetic measurement systems, there are also domestic some instruments, although can be carried out high temperature and low-temperature measurement, this kind of instrument test
Sample mass as little as microgram measure, material damage can only be sampled, characterization be some film micro area of material magnetism of material
Can, it is unable to the magnetic property of reaction material entirety, is appropriate for investigation of materials, is unsuitable for the Magnetic Measurement of material production, while instrument
Device is expensive, complicated for operation, requires operator when measurement high, needs special messenger to operate, needs liquid helium cooling, consumptive material is expensive.Cause
This measures its high temperature and cryomagnetism energy at present for the soft magnetic materials used in high temperature and low temperature environment, is badly in need of finding one
Kind is cheap, easy to operate, can characterize the measuring system of whole soft magnetic materials high-temperature magnetic energy, cryomagnetism energy.
Summary of the invention
In view of the above problems, the object of the present invention is to provide a kind of high/low temperature sound state soft magnetic characteristic measuring systems, with solution
Certainly existing test device is expensive and destroys sampling, or the problem of can not carry out the high and low temperature test to soft magnetic materials.
High/low temperature sound state soft magnetic characteristic measuring system provided by the invention, for the standard ring made of soft magnetic materials
It carries out magnetism to be capable of measuring, high/low temperature sound state soft magnetic characteristic measuring system includes: that soft magnetism direct-current measuring device exchanges survey with soft magnetism
Device is measured, soft magnetism direct-current measuring device and soft magnetism alternating-current measuring device respectively include magnetizing coil interface and measuring coil interface,
Soft magnetism direct-current measuring device further includes DC excitation power, and soft magnetism alternating-current measuring device further includes ac excitation power supply, high/low temperature
Sound state soft magnetic characteristic measuring system further includes function translator, high temperature furnace and low temperature oven；Wherein, standard ring is suspended on high temperature furnace
Or in low temperature oven, magnetizing coil and measuring coil are wound on standard ring, the both ends of magnetizing coil are respectively connected to soft magnetism direct current
The magnetizing coil interface of measuring device and the magnetizing coil interface of soft magnetism alternating-current measuring device, the both ends of measuring coil are respectively connected to
The measuring coil interface of soft magnetism direct-current measuring device and the measuring coil interface of soft magnetism alternating-current measuring device；It is opened up in high temperature furnace
There is container, be provided in container and turn to hollow heating coil, heating coil passes through conducting wire and high temperature furnace control cabinet
It is electrically connected；Holding tank is offered in low temperature oven, low temperature filling is provided in holding tank, has been filled with liquid nitrogen in low temperature filling,
Resistance wire is wound on the outer wall that low temperature fills, resistance wire is electrically connected by conducting wire and low temperature oven control cabinet；Function translator
Including first choice relay and the second selective relay, first choice relay include the first static contact, the second static contact with
And with the first static contact or the second static contact overlapped the first moving contact, the second selective relay includes third static contact, the 4th
Static contact and with third static contact or the 4th static contact overlapped the second moving contact；Wherein, the first static contact and low temperature oven control
The power supply of cabinet processed connects, and the second static contact is connect with the power supply of high temperature furnace control cabinet, and third static contact and soft magnetism DC measurement fill
Connection is set, the 4th static contact is connect with soft magnetism alternating-current measuring device；And when the first moving contact and the first static contact overlap joint, and
When second moving contact and third static contact overlap, low temperature oven control cabinet is connected, measuring coil accesses soft magnetism direct-current measuring device, magnetic
Change coil and accesses DC excitation power；When the first moving contact and the first static contact overlap, and the second moving contact and the 4th static contact
When overlap joint, low temperature oven control cabinet is connected, measuring coil accesses soft magnetism alternating-current measuring device, and magnetizing coil accesses AC excitation electricity
Source；When the first moving contact and the second static contact overlap, and the second moving contact and third static contact overlap, high temperature furnace control is connected
Cabinet, measuring coil access soft magnetism direct-current measuring device, and magnetizing coil accesses DC excitation power；When the first moving contact and second quiet
Contact overlap joint, and when the second moving contact and the 4th static contact overlap joint, high temperature furnace control cabinet is connected, measuring coil accesses soft magnetism exchange
Measuring device, magnetizing coil access ac excitation power supply；And when measuring coil accesses soft magnetism direct-current measuring device, standard
The ratio between outer diameter and internal diameter of ring≤1.4；When measuring coil accesses soft magnetism alternating-current measuring device, the outer diameter of standard ring and internal diameter it
Than≤1.1.
Compared with prior art, high/low temperature sound state soft magnetic characteristic measuring system provided by the invention, can obtain
Technical effect:
1, the high and low temperature test environment is built by high temperature furnace and low temperature oven, realizes the high and low temperature test of soft magnetic materials；
2, by function translator free switching high temperature furnace and low temperature oven, direct current and alternating current, meet to soft magnetic materials
Low temperature, high temperature, dynamic, static state soft magnet performance measurement；
3, the measuring system is at low cost, easy to operate, and non-magnetic material professional is convenient to use.
Detailed description of the invention
By reference to the explanation below in conjunction with attached drawing, and with a more complete understanding of the present invention, of the invention is other
Purpose and result will be more clearly understood and understood.In the accompanying drawings:
Fig. 1 is the logical construction schematic diagram according to the high/low temperature sound state soft magnetic characteristic measuring system of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram according to the low temperature oven of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram according to the high temperature furnace of the embodiment of the present invention；
Fig. 4 is the structural schematic diagram according to the function translator of the embodiment of the present invention.
Appended drawing reference in figure includes: low temperature oven 1, low temperature filling 11, resistance wire 12, standard ring 13, temperature tube 14, low temperature oven
Control cabinet 15, high temperature furnace 2, heating coil 21, high temperature furnace control cabinet 22, standard ring 23, temperature tube 24, intake valve 25, air outlet valve
26, air accumulator 27, vacuum pump 28, function translator 3, first choice relay 31, the second selective relay 32, soft magnetism exchange are surveyed
Measure device 4, soft magnetism direct-current measuring device 5, computer 6, printer 7.
Specific embodiment
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.
High/low temperature sound state soft magnetic characteristic measuring system provided by the invention, for the standard ring made of soft magnetic materials
Carry out magnetism be capable of measuring, standard ring meet national standard GB/T3657-1983 requirement, magnetism be capable of measuring including high temperature, low temperature, exchange and
DC measurement, high temperature measurement refer to that temperature is magnetization curve, the hysteresis loop, damage of the standard ring of arbitrary temp in 25 DEG C -500 DEG C
The measurement of the parameter of magnetic characteristic such as consumption, magnetic conductivity, saturation induction density, coercivity；Low-temperature measurement refers in -196 DEG C -25 DEG C and appoints
The magnetic characteristics ginseng such as the magnetization curve of standard ring of temperature of anticipating, hysteresis loop, loss, magnetic conductivity, full, magnetic induction intensity, coercivity
Several measurements；AC measurment refers to the dynamic measurement of standard ring；DC measurement refers to the static measurement of standard ring.
Fig. 1 shows the logical construction of high/low temperature sound state soft magnetic characteristic measuring system according to an embodiment of the present invention.
As shown in Figure 1, high/low temperature sound state soft magnetic characteristic measuring system includes: low temperature oven 1, high temperature furnace 2, function translator
3, soft magnetism alternating-current measuring device 4 and soft magnetism direct-current measuring device 5, soft magnetism alternating-current measuring device 4 are the exchange of MATS-2010SA soft magnetism
Measuring device, for carrying out dynamic measurement to standard ring, soft magnetism direct-current measuring device 5 is the DC measurement of MATS-2010SD soft magnetism
Device, for carrying out static measurement to standard ring, MATS-2010SD soft magnetism direct-current measuring device and MATS-2010SA soft magnetism are handed over
Flow measuring apparatus includes magnetizing coil interface and measuring coil interface, and MATS-2010SD soft magnetism direct-current measuring device further includes
DC excitation power, MATS-2010SA soft magnetism alternating-current measuring device further include ac excitation power supply, DC excitation power be used for
MATS-2010SD soft magnetism direct-current measuring device provides direct current, and ac excitation power supply is used to exchange to MATS-2010SA soft magnetism and survey
It measures device and alternating current is provided.MATS-2010SD soft magnetism direct-current measuring device and MATS-2010SA soft magnetism alternating-current measuring device are existing
There is technology, the other structures of device repeat no more in the present invention.
High/low temperature sound state soft magnetic characteristic measuring system further includes computer 6 and printer 7, and printer 7 and computer 6 connect
It connects, computer 6 is used to carry out data processing to the test result of standard ring, and printer 7 is used to print the test result of standard ring.
Magnetizing coil and measuring coil are wound on standard ring, the both ends of magnetizing coil are respectively connected to MATS-2010SD
The magnetizing coil interface of soft magnetism direct-current measuring device or the magnetizing coil interface of MATS-2010SA soft magnetism alternating-current measuring device, magnetic
Change coil to magnetize standard ring after accessing DC excitation power, the both ends of measuring coil are respectively connected to soft magnetism DC measurement
The measuring coil interface of device 5 or the measuring coil interface of soft magnetism alternating-current measuring device 4, the corresponding magnetic property of measurement standard ring.
Function translator 3 makes in low temperature oven 1 and high temperature furnace 2 for switching DC excitation power or ac excitation power supply
Magnetizing coil has access to DC excitation power or ac excitation power supply, when magnetizing coil accesses DC excitation power, measurement
Coil carries out DC measurement to standard ring, and when magnetizing coil accesses ac excitation power supply, measuring coil hands over standard ring
Flow measurement.
When carrying out AC measurment to standard ring, the ratio between outer diameter and internal diameter of standard ring should meet following formula:
D≤1.4d (1)
In formula (1), D indicates the outer diameter of standard ring, and unit is rice, and d indicates the internal diameter of standard ring, and unit is rice.
In order to facilitate statement, the standard ring for carrying out AC measurment is referred to as dynamic ring, it is preferable that the outer diameter of dynamic ring with
The ratio between internal diameter is less than 1.25.
When carrying out DC measurement to standard ring, the ratio between outer diameter and internal diameter of standard ring should meet following formula:
D≤1.1d (2)
In formula (2), D indicates the outer diameter of standard ring, and unit is rice, and d indicates the internal diameter of standard ring, and unit is rice.
Above-mentioned formula (1) and formula (2) are the national standard GB/T3657-1983 requirement of standard ring.
In order to facilitate statement, the standard ring for carrying out DC measurement is referred to as static ring.
Standard ring is suspended in low temperature oven 1 or high temperature furnace 2, cannot hang standard ring in high temperature furnace 2 and low temperature oven 1 simultaneously
The reason of be MATS-2010SD soft magnetism direct-current measuring device and MATS-2010SA soft magnetism alternating-current measuring device respectively only have one
A magnetizing coil interface and a measuring coil interface, therefore, MATS-2010SD soft magnetism direct-current measuring device or MATS-
2010SA soft magnetism alternating-current measuring device can only measure a standard ring, and the present invention can only be according to pyrometry after first survey low temperature
Or survey the sequence of low temperature after first pyrometry and standard ring is measured, specifically, after first to survey low temperature for pyrometry, first will
Standard ring (dynamic ring or static ring), which is put into low temperature oven, carries out low temperature direct measurement or low temperature AC measurment, then by standard ring
(dynamic ring or static ring) takes out out of low temperature oven to be put into high temperature furnace, carries out high temperature DC measurement to standard ring or high temperature exchanges
Measurement.
Fig. 2 is the structure according to the low temperature oven of the embodiment of the present invention.
As shown in Fig. 2, offering holding tank in low temperature oven 1, it is provided with low temperature in holding tank and fills 11, fills 11 in low temperature
It is inside filled with liquid nitrogen, liquid nitrogen can reduce the temperature in low temperature filling 11, fills 11 for low temperature and provides low temperature environment, fill 11 in low temperature
Resistance wire 12 is wound on outer wall, resistance wire 12 is electrically connected by conducting wire and low temperature oven control cabinet 15, is filled in 11 and is hanged in low temperature
Hang with standard ring 13；After low temperature oven control cabinet 15 is powered to resistance wire 12, resistance wire 12 fills 11 to low temperature and heats, thus
The temperature in low temperature filling 11 is adjusted, the measurement temperature of standard ring 13 is changed.
The temperature in 11 is filled for the ease of measurement low temperature, the present invention measures the temperature in low temperature filling 11 by a temperature tube 14
Degree, one end of temperature tube 14 are protruded into low temperature and are filled in 11, and the other end is connect with low temperature oven control cabinet 15, passes through low temperature oven control cabinet 15
The temperature that display temperature tube 14 measures.
Fig. 3 shows the structure of high temperature furnace according to an embodiment of the present invention.
As shown in figure 3, offering container in high temperature furnace 2, it is provided in container and turns to hollow heater wire
Circle 21, heating coil 21 are electrically connected by conducting wire and high temperature furnace control cabinet 22；It is hung in the hollow position of heating coil 21
Standard ring 23, after high temperature furnace control cabinet 22 is powered to heating coil 21, heating coil 21 heats standard ring 23.
For the ease of the temperature in measurement high temperature furnace 2, the present invention measures the temperature in high temperature furnace 2 by a temperature tube 24
Degree, one end of temperature tube 24 are protruded into high temperature furnace 2, and the other end is connect with high temperature furnace control cabinet 22, passes through high temperature furnace control cabinet 22
The temperature that display temperature tube 24 measures.
Standard ring 23 vacuumizes or is filled with inert gas in 2 internal oxidition of high temperature furnace, the needs of high temperature furnace 2 in order to prevent, therefore,
It is provided with intake valve 25 and air outlet valve 26 on high temperature furnace 2, intake valve 25 is communicated with air accumulator 27 by tracheae, in air accumulator 27
Equipped with inert gas, air outlet valve 26 is communicated with vacuum pump 28 by connecting pipe, and the present invention first opens air outlet valve 26, passes through vacuum
Pump 28 takes the air in high temperature furnace 2 away, then opens intake valve again, since the pressure in high temperature furnace 2 is higher than external atmosphere
Pressure, when opening intake valve 25, the inert gas in air accumulator 27 is drawn into high temperature furnace 2.Since vacuum pump 28 cannot be complete
By the air extraction in high temperature furnace 2, therefore, inert gas is just filled with into high temperature furnace 2, inert gas can prevent standard ring 23
It is oxidized under conditions of high temperature.
Fig. 4 shows the structure of function translator according to an embodiment of the present invention.
As shown in figure 4, function translator includes first choice relay 31 and the second selective relay 32, first choice after
Electric appliance 31 includes the first static contact, the second static contact and the first moving contact, the first moving contact and the first static contact or the second stationary contact
Head overlap joint, the first static contact are connect with the power supply of low temperature oven control cabinet 15, the power supply of the second static contact and high temperature furnace control cabinet 22
Connection；Second selective relay 32 includes third static contact, the 4th static contact and the second moving contact, and the second moving contact and third are quiet
Contact or the 4th static contact overlap joint, third static contact are connect with soft magnetism direct-current measuring device 5, and the 4th static contact exchanges survey with soft magnetism
Device 4 is measured to connect.
When the first moving contact and the first static contact overlap, and the second moving contact and third static contact overlap, low temperature is connected
The power supply of furnace control cabinet 15, measuring coil access soft magnetism direct-current measuring device 5, and magnetizing coil accesses DC excitation power, thus
Low temperature static measurement is carried out to standard ring by measuring coil.
When the first moving contact and the first static contact overlap, and the second moving contact and the 4th static contact overlap, low temperature is connected
The power supply of furnace control cabinet 15, measuring coil access soft magnetism alternating-current measuring device 4, and magnetizing coil accesses ac excitation power supply, thus
Low-temperature dynamic measurement is carried out to standard ring by measuring coil.
When the first moving contact and the second static contact overlap, and the second moving contact and third static contact overlap, high temperature is connected
The power supply of furnace control cabinet 22, measuring coil access soft magnetism direct-current measuring device 5, and magnetizing coil accesses DC excitation power, thus
High temperature static measurement is carried out to standard ring by measuring coil.
When the first moving contact and the second static contact overlap, and the second moving contact and the 4th static contact overlap, high temperature is connected
The power supply of furnace control cabinet 22, measuring coil access soft magnetism alternating-current measuring device 4, and magnetizing coil accesses ac excitation power supply, thus
High temperature dynamic is carried out to standard ring by measuring coil to measure.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. a kind of high/low temperature sound state soft magnetic characteristic measuring system, for carrying out soft magnetism to the standard ring made of soft magnetic materials
It is capable of measuring, the high/low temperature sound state soft magnetic characteristic measuring system includes: soft magnetism direct-current measuring device and soft magnetism AC measurment dress
It sets, the soft magnetism direct-current measuring device and soft magnetism alternating-current measuring device respectively includes magnetizing coil interface and measuring coil connects
Mouthful, the soft magnetism direct-current measuring device further includes DC excitation power, and the soft magnetism alternating-current measuring device further includes AC excitation
Power supply, which is characterized in that the high/low temperature sound state soft magnetic characteristic measuring system further includes function translator, high temperature furnace and low temperature
Furnace；Wherein,
The standard ring is suspended in the high temperature furnace or the low temperature oven, is wound with magnetizing coil and survey on the standard ring
Coil is measured, the both ends of the magnetizing coil are respectively connected to the magnetizing coil interface and the soft magnetism of the soft magnetism direct-current measuring device
The magnetizing coil interface of alternating-current measuring device, the both ends of the measuring coil are respectively connected to the survey of the soft magnetism direct-current measuring device
Measure the measuring coil interface of coil interface and the soft magnetism alternating-current measuring device；
Container is offered in the high temperature furnace, is provided in the container and turns to hollow heating coil, it is described
Heating coil is electrically connected by conducting wire and high temperature furnace control cabinet；
Holding tank is offered in the low temperature oven, is provided with cryogenic tank in the holding tank, is filled in the cryogenic tank
Enter to have liquid nitrogen, resistance wire is wound on the outer wall of the cryogenic tank, the resistance wire passes through conducting wire and low temperature oven control cabinet electricity
Property connection；
The function translator includes first choice relay and the second selective relay, and the first choice relay includes the
One static contact, the second static contact and with first static contact or second static contact overlapped the first moving contact, it is described
Second selective relay includes third static contact, the 4th static contact and takes with the third static contact or the 4th static contact
The second moving contact connect；Wherein, first static contact is connect with the power supply of the low temperature oven control cabinet, second static contact
It being connect with the power supply of the high temperature furnace control cabinet, the third static contact is connect with the soft magnetism direct-current measuring device, and described
Four static contacts are connect with the soft magnetism alternating-current measuring device；And
When first moving contact and first static contact overlap joint, and second moving contact and the third static contact overlap
When, the low temperature oven control cabinet is connected, the measuring coil accesses the soft magnetism direct-current measuring device, the magnetizing coil access
The DC excitation power；
When first moving contact and first static contact overlap joint, and second moving contact and the 4th static contact overlap
When, the low temperature oven control cabinet is connected, the measuring coil accesses the soft magnetism alternating-current measuring device, the magnetizing coil access
The ac excitation power supply；
When first moving contact and second static contact overlap joint, and second moving contact and the third static contact overlap
When, the high temperature furnace control cabinet is connected, the measuring coil accesses the soft magnetism direct-current measuring device, the magnetizing coil access
The DC excitation power；
When first moving contact and second static contact overlap joint, and second moving contact and the 4th static contact overlap
When, the high temperature furnace control cabinet is connected, the measuring coil accesses the soft magnetism alternating-current measuring device, the magnetizing coil access
The ac excitation power supply；And
When the measuring coil accesses the soft magnetism direct-current measuring device, the ratio between outer diameter and internal diameter of the standard ring≤1.4；
When the measuring coil accesses the soft magnetism alternating-current measuring device, the ratio between outer diameter and internal diameter of the standard ring≤1.1.
2. high/low temperature sound state soft magnetic characteristic measuring system as described in claim 1, which is characterized in that further include two thermometrics
Pipe, one end of a temperature tube therein are connect with the low temperature oven control cabinet, and the other end protrudes into the cryogenic tank, another
One end of root temperature tube is connect with the high temperature furnace control cabinet, and the other end protrudes into the high temperature furnace.
3. high/low temperature sound state soft magnetic characteristic measuring system as described in claim 1, which is characterized in that on the high temperature furnace
Be provided with intake valve and air outlet valve, the intake valve is communicated with air accumulator, is provided with inert gas in the air accumulator, it is described go out
Air valve is communicated with vacuum pump.
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