CN106405457A - Device used for material ferromagnetism and magnetization performance detection and method thereof - Google Patents
Device used for material ferromagnetism and magnetization performance detection and method thereof Download PDFInfo
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- CN106405457A CN106405457A CN201610764047.4A CN201610764047A CN106405457A CN 106405457 A CN106405457 A CN 106405457A CN 201610764047 A CN201610764047 A CN 201610764047A CN 106405457 A CN106405457 A CN 106405457A
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- ferromagnetism
- magnetic
- magnetic shielding
- dispatch tube
- magnetization
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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
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
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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
- G01R33/1215—Measuring magnetisation; Particular magnetometers therefor
Abstract
The invention discloses a device used for material ferromagnetism and magnetization performance detection. The device comprises a laser device, linearly polarized light beams, a Glan-Thompson polarizer, an electromagnetic shielding cover, a radio frequency shielding box, a magnetic shielding cylinder, an axial scanning field coil, a heating and heat preservation module, atomic vapor bubbles, a light amplification detection module, a conveying tube sealing block, a conveying tube, a solenoid coil, a positioning frame and a grooved loading warehouse. The invention also discloses a method used for material ferromagnetism and magnetization performance detection. The device is integrated in structure and convenient to operate, material ferromagnetism and magnetization performance detection is acquired through nonlinear magneto-optical resonance dispersion signals, and the device has the characteristic of ultrahigh-sensitivity magnetic measurement and practical value in material selection of atomic frequency standards, atomic magnetometers and laser detection magnetic resonance instruments.
Description
Technical field
The present invention relates to optical pumping and optical detector technology field, it is more particularly to one kind and is used for material ferromagnetism and magnetizability
Can detection device, further relate to a kind of for material ferromagnetism and magnetization property detection method, it is particularly applicable to atomic frequency standard,
The selection of the instruments such as atomic magnetic force meter, laser acquisition magnetic resonance device, screens material, eliminates the ferromagnetism due to material or magnetization
The instrument system magnetic field bump causing.
Background technology
With scientific and technological development it is desirable to atomic frequency standard, atomic magnetic force meter, laser acquisition magnetic resonance device equally accurate are higher, more
Plus microminaturization, performance are more excellent, therefore, the performance of material just becomes more notable to the characteristic impact of equipment.No magnetic is not
Rust steel, copper material, aluminium, titanium alloy etc. are commonly known as no magnetic metal material, are not have magnetic material.But, due to former
The impure, manufacturing process of material or the impact of processing technique, can more or less contain not in some " no magnetic " metal materials
Congruent Ferromagnetic Impurities so that they be used for instrument and equipment in be in ferromagnetism or faint magnetic, the pcrmeability of material
High-accuracy performance of instrument and equipment etc. can be produced obviously affect, and how we carried out to the performance of selected materials soon
Speed test？How to detect material ferromagnetism and magnetized performance exactly？
At present, the method for the detection magnetism of material such as gaussmeter of existing magnetic balance and multiple different principle.Magnetic balance method is logical
Cross the power that non-uniform magnetic-field acts on material to measure, detected materials can be pole, sheet material or powder, but,
The detected materials size ratio asked is larger, is not suitable for the detection of the detected materials of device or irregular size.With respect to magnetic field
Intensity, different types of gaussmeter has different survey magnetic scopes.For example, the vibrating example magnetic strength based on electromagnetic induction principle
Meter, the induced potential of coil is directly proportional to the intensity of magnetization of detected materials, has the harsh rule of comparison to the shape of detected materials
Determine it is desirable to be circular or lamellar, and weight not can exceed that ~ g, therefore limits the test scope of detected materials magnetic；Magnetic
Flux-gate magnetometer is commonly used to detect the remanent magnetism of material, its remolding sensitivity is higher, can reach ~ nT, it can however not detecting
Less than the magnetic of nT, it is not suitable for the superweak Magnetic testi of material, and does not test magnetized function.
Therefore, for the selection of the instruments such as atomic frequency standard, atomic magnetic force meter, laser acquisition nuclear magnetic resonance spectrometer, screen " no
Whether no magnetic " metal material is located at magnetic in use environment？Detect their ferromagnetism and magnetization property, how more easy, fast
Speed, accurately selection non-magnetic material？Urgently need develop material ferromagnetism and magnetization property detection new method and new technique.
Content of the invention
The purpose of the present invention is the problems referred to above being to exist for prior art, provide a kind of for material ferromagnetism and
The detection means of magnetization property, additionally provides a kind of method for material ferromagnetism and magnetization property detection.
The above-mentioned purpose of the present invention is achieved through the following technical solutions：
A kind of device for material ferromagnetism and magnetization property detection, including laser instrument, also includes electro-magnetic shielding cover, is arranged on
Radio-frequency screening box in electro-magnetic shielding cover, the magnetic shielding cylinder being arranged in radio-frequency screening box, the heating being arranged in magnetic shielding cylinder
Heat preservation module and be arranged on atom steam bubble in heating and thermal insulation module, the linearly polarized light beam of laser emitting enters through polariser
Detected by light amplification detecting module after being mapped to atom steam bubble, be provided with magnetic shielding cylinder for producing and linearly polarized light beam transmission
The axial field sweep coil in direction identical axial scan magnetic field, dispatch tube one end sequentially pass through electro-magnetic shielding cover, radio-frequency screening box,
Magnetic shielding cylinder and heating and thermal insulation module are positioned close to the region of atom steam bubble, and the dispatch tube other end is provided with dispatch tube envelope block
And be connected with Pneumatic control module, it is provided with trough of belt loading pocket in dispatch tube, dispatch tube is arranged with solenoid coil, solenoid
Coil is connected with the first power supply, and axial field sweep coil is connected with second source.
Heating and thermal insulation module as above includes heating furnace and incubation cavity, and atom steam bubble is arranged on insulation intracavity, plus
Hot stove is arranged between atom steam bubble and incubation cavity.
The material of heating furnace as above is zirconium oxide, and the material of incubation cavity is polyimide foam.
A kind of device for material ferromagnetism and magnetization property detection, also includes locating rack, and locating rack includes laterally propping up
Frame and the column being connected with horizontal support, horizontal support one end sequentially pass through electro-magnetic shielding cover, radio-frequency screening box, magnetic shielding cylinder and
Heating and thermal insulation module is positioned close to the region of atom steam bubble, and horizontal support is provided with scale, and dispatch tube is arranged on laterally
On support.
Atomic vapour bubble inwall as above is provided with paraffin coating.
Dispatch tube envelope stock material as above is politef, and dispatch tube seals block）On offer gas port, described
Dispatch tube material is lucite.
The magnetic field intensity scope of solenoid coil as above is 0～0.5 Tesla.
A kind of method for material ferromagnetism and magnetization property detection, comprises the following steps：
Step 1, the detection of detected materials ferromagnetism, specific as follows：
Step 1.1, the collection of initial non-linearities magneto-optic resonance signal：Detected materials are placed in trough of belt loading pocket, trough of belt loads
Position in storehouse, in the arrival end of dispatch tube, does not have detected materials, using laser in magnetic shielding cylinder in the region of atomic vapour bubble
The 894 nm linearly polarized light beams that device produces are irradiated to atomic vapour bubble, and axial field sweep coil produces field sweep, 894 nm line polarized lights
Bundle measures the change of polarization signal light by light amplification detecting module and obtains nonlinear magnetism photoresonance former after atomic vapour bubble
Beginning signal；
Step 1.2, the signals collecting of original material：Using Pneumatic control module, trough of belt loading pocket is delivered to magnetic along dispatch tube orientation
Close to the region of atomic vapour bubble in shielding cylinder, axial field sweep coil is constantly in working condition and produces field sweep, and record time is to be measured
Non-linear magneto-optical resonance signal under Effect of Materials；
Step 2, material magnetization performance detection：
Step 2.1, the magnetization of detected materials：Drive trough of belt loading pocket that detected materials are passed along dispatch tube using Pneumatic control module
Deliver to the region positioned at solenoid coil, open the first power supply and produce magnetic field to solenoid coil energising, detected materials are carried out
Magnetization；
Step 2.2, the signals collecting of Magnetized Material：Close the first power supply, drive trough of belt to load again by Pneumatic control module
Storehouse is transported in magnetic shielding cylinder close to the region of atomic vapour bubble, records the magnetic that magnetized detected materials produce in magnetic shielding cylinder
The impact to non-linear magneto-optical resonance signal for the field change.
The present invention provides a kind of method for material ferromagnetism and magnetization property detection.Using atom and laser phase interaction
With the magnetic rotation phenomenon producing（I.e.：Nonlinear magneto-optical effect）As a kind of method detecting Weak magentic-field.The atom of polarization
Under external magnetic field, the atom polar moment forming an angle with outer magnetic field direction around magnetic field precession, from the polarization of line polarized light
Change can detect this precession.It is specifically described as：When line polarized light is after being in the atomic vapour in certain external magnetic field, by
To line polarized light middle left and right circular polarization component, there is different absorptions and dispersion in atomic vapour, that is, atomic vapour is to two kinds of circles
The refractive index difference of polarized light, so that left and right rounding polarized light is each propagated at different rates, leads to the polarization of line polarized light
There is the rotation related to magnetic field in face.Nonlinear magneto-optical effect signal due to producing has extremely narrow live width, and non-to magnetic field
Often sensitive, therefore, this method has highly sensitive magnetic field detection ability.In the case of additional field sweep, it is possible to use non-thread
Property magneto-optic resonance as distinguishing signal, detect ferromagnetism and the magnetization property of material.In addition, what the plane of polarization of line polarized light rotated
Angle is directly proportional in necessarily interval to external magnetic field size, thus, can be used to Extrapolation goes out external magnetic field size, thus realizing
Highly sensitive magnetic measurement（PT ~ fT magnitude）.High sensitivity material ferromagnetism and magnetization property are realized by optical detection mode
Detection, method is accurate, easy.Different from existing detection scheme, the material ferromagnetism based on nonlinear magneto-optical effect and magnetizability
Can detection method, the initial ferromagnetism of material can not only be detected it is also possible to detection material whether can be by higher magnetic field
Magnetization, thus, extend the function of material examination, there is wider application.
The present invention provides a kind of device for material ferromagnetism and magnetization property detection, and physical piece is atomic vapour
Bubble, is sequentially arranged with heating and thermal insulation module, axial field sweep coil, magnetic shielding cylinder, electro-magnetic shielding cover, radio shielding outside atomic vapour bubble
Box；Atom in atomic vapour bubble is as the working media of Magneto-optic Rotation；During axial field sweep coil working, produced by laser instrument
Linearly polarized light beam passes through Glan-thomson polariser and ensures polarization, then passes through atomic vapour bubble, incides light amplification and detects mould
Block is detected, and obtains because atom is interacted with linear polarization bundle and produces the dispersion signal of nonlinear magnetism photoresonance；To treat
Material of measuring and monitoring the growth of standing timber is placed in trough of belt loading pocket, is sent in magnetic shielding cylinder by dispatch tube, close to atomic vapour bubble region, remembers again
Record dispersion signal, contrasts the dispersion signal amplitude that measures twice and line style, can detect material whether have ferromagnetism and
The relative intensity of magnetic.Sub-module of the present invention design, function integration, easy to operate, the features such as have hypersensitivity, can be simultaneously
Realize ferromagnetism detection and the magnetization detection of material, with more practicality, have been used to develop the enforcement of the instruments such as atomic magnetic force meter
Carry out selection in example.
The present invention has advantages below with respect to prior art：
（1）Produce field sweep using axial field sweep coil, the atom of polarization under field sweep effect, lead to the polarization direction of light produce with
The related rotation in magnetic field, assumes nonlinear magnetism photoresonance, the dispersion signal of nonlinear magnetism photoresonance has extremely narrow live width, and right
Magnetic-field-sensitive, therefore has highly sensitive ferromagnetism and magnetization property power of test, and embodiment shows, original non-according to contrasting
Linear magneto-optic resonance signal, it is possible to achieve the ferromagnetism of material and the high-sensitivity detection of magnetization property.
（2）Detected materials are placed in trough of belt loading pocket, using lead effect of contraction so that trough of belt loading pocket is accurate
Positioning, can effectively realize detected materials orientation and deliver in magnetic shielding cylinder, close to the region of atomic vapour bubble it is also possible to be applied to zero
Field sample introduction, the orientation being effectively realized nuclear magnetic resonance sample, no rotation are sent to detecting area, are easily extended to nuclear magnetic resonance
Research.
（3）Locating rack adjusts distance in transmission bottom of the tube and magnetic shielding cylinder, between atomic vapour bubble, it is possible to achieve effectively
The ferromagnetism of detection material and magnetization property, the magnetic property of judgement material effectively, screen material and carry out accurate selection.
（4）Heating and thermal insulation module includes heating furnace, incubation cavity, and heating furnace material is zirconium oxide, and zirconium oxide chemical property is not
Active and there is high-melting-point, high resistivity, high index of refraction, low thermal coefficient of expansion and the high property of heat conductivity；Insulation cavity material
Material for incubation cavity is polyimide foam（A kind of porous material for synthesis of polyimides making, protects as efficient
Temperature）, while effective holding atomic vapour bubble temperature stabilization, also function to necessarily absorb the effect of vibrations.
（5）Electro-magnetic shielding cover utilizes outermost layer copper mesh shielding electrostatic field and frequency electromagnetic waves, and intermediate layer high magnetic permeability paper tinsel is inhaled
Receive electromagnetic field, the feature of innermost layer low magnetic permeability paper tinsel high saturated magnetic induction, it is possible to provide the magnetic field shielding of widest range, can have
Effect reduces the interference of electromagnetic field in environment and the impact of outside strong-electromagnetic field it is ensured that the reliability that detects of magnetization property.
（6）Radio-frequency screening box, provides radio shielding, reduces RF fields for atomic vapour bubble.Can be through simply changing
Make and make this device as radio frequency magnetometer, be conveniently used in the research of nuclear quadrupole moment nuclear magnetic resonance sample, be more widely applied.
（7）Detected materials delivery module（Seal block, dispatch tube, trough of belt loading pocket including Pneumatic control module, dispatch tube）'s
Use, can effectively realize special-shaped material（Such as wire rod, lamellar, bulk material, or minute sized components and parts etc.）Orientation
Deliver in magnetic shielding cylinder, close to atomic vapour bubble region, easily extend special-shaped material ferromagnetism detection research, application is wider
General.
（8）The plane of polarization rotational angle of line polarized light and external magnetic field size are directly proportional in necessarily interval, thus can by with
Carry out Extrapolation and go out external magnetic field size, be easily extended to the ferromagnetism measurement of material.
（9）The present invention has that detected materials transmission is quick, registration, can achieve the highly sensitive of ferromagnetism and magnetization property
The features such as degree detects, is easy to expanded application.Due to the present invention adopt the ultralow material of the screen method of composite bed, heat conductivity and
Accurately positioning transmission, greatly reduces the impact of outer bound pair atomic vapour bubble work, therefore, it is possible to more critically detect material
Ferromagnetism and magnetization property.
（10）Setting of the instruments such as atomic frequency standard, atomic magnetic force meter, laser acquisition nuclear magnetic resonance spectrometer can be effectively applied to
In meter selection work, both highly sensitive can detect material ferromagnetism, material magnetization performance can also be detected, further increase material
The sensitivity of magnetic surveyed by material, is with a wide range of applications, and the also expansible laser acquisition magnetic resonance being applied to null field, magnetic resonance becomes
The research such as picture.
Brief description
Fig. 1 show a kind of apparatus structure schematic diagram for material ferromagnetism and magnetization property detection.
In figure：1- laser instrument, 2- linearly polarized light beam, 3- Glan-thomson polariser, 4- electro-magnetic shielding cover, 5- radio frequency screen
Cover box, 6- magnetic shielding cylinder, 7- axial direction field sweep coil, 8- heating and thermal insulation module, 9- atomic vapour bubble, 10- light amplification detecting module,
11- dispatch tube envelope block, 12- dispatch tube, 13- solenoid coil, 14- locating rack, 15- trough of belt loading pocket.
Fig. 2 show a kind of operating diagram for material ferromagnetism and the method for magnetization property detection.
In figure：[A] detected materials are placed in trough of belt loading pocket, and trough of belt loading pocket is located at the arrival end of dispatch tube, this
When, measurement is as the dispersion signal of the nonlinear magnetism photoresonance generation of standard；[A] [C] loads equipped with the trough of belt of detected materials
The dispersion that storehouse is sent in magnetic shielding cylinder, produces for nonlinear magnetism photoresonance close to the region of atomic vapour bubble, measurement material
Whether no the impact that signal produces, obtain material ferromagnetism；[B] is sent to solenoid equipped with the trough of belt loading pocket of detected materials
In coil, power-on produces magnetic field, and material is magnetized；[B] [C], equipped with the material of magnetization treatment, is loaded by trough of belt
The dispersion that storehouse is sent in magnetic shielding cylinder, produces for nonlinear magnetism photoresonance close to the region of atomic vapour bubble, measurement material
The impact that signal produces, obtains material magnetization performance.
Fig. 3 show a kind of device enforcement figure for material ferromagnetism and magnetization property detection.
In figure：1- laser instrument, 2- linearly polarized light beam, 3- Glan-thomson polariser, 4- electro-magnetic shielding cover, 5- radio frequency screen
Cover box, 6- magnetic shielding cylinder, 7- axial direction field sweep coil, 8- heating and thermal insulation module, 9- atomic vapour bubble, 10- light amplification detecting module,
11- dispatch tube envelope block, 12- dispatch tube, 13- solenoid coil, 14- locating rack, 15- trough of belt loading pocket, 16- pneumatic control mould
Block, 17- first power supply, 18- temperature control modules, 19- data acquisition computer, 20- second source.
Detected materials are placed in trough of belt loading pocket, constrain trough of belt loading pocket using lead, realize directionally in helical
Detected materials are transmitted between pipeline circle and magnetic shielding cylinder central area；Using generation non-linear magneto-optical in the case of additional field sweep altogether
Shake, it is possible to use this dispersion signal, as distinguishing signal, to detect magnetic and the magnetization property of material.
Fig. 4 show a kind of embodiment spectrogram for material ferromagnetism and the device of magnetization property detection.
In figure：A, nonlinear magnetism photoresonance primary signal, b, known non-magnetic material signal, c, the copper cash letter containing trace iron
Number, d, containing ferrimagnet signal, e, material be magnetized after signal.
Specific embodiment
1- Fig. 4 below in conjunction with the accompanying drawings, to the present invention's taking using alkali metal caesium -133 atom and 894 nm laser instrument as a example
Technical scheme is described in further detail embodiment.
As shown in figure 1, a kind of device for material ferromagnetism and magnetization property detection, including laser instrument 1, line polarized light
Bundle 2, Glan-thomson polariser 3, electro-magnetic shielding cover 4, radio-frequency screening box 5, magnetic shielding cylinder 6, axial field sweep coil 7, heating are protected
Warm module 8, atomic vapour bubble 9, light amplification detecting module 10, dispatch tube envelope block 11, dispatch tube 12, solenoid coil 13, positioning
Frame 14, trough of belt loading pocket 15.
Material, shape and the structure of each part of the present invention are described first：
Laser instrument 1, the semiconductor laser of model TopticsDL-100, operation wavelength be 894nm, be matched with alkali metal caesium-
The D1 line of 133 atoms.As light source in the present invention is implemented, produce linearly polarized light beam 2.
Linearly polarized light beam 2, wavelength is 894 nm, is launched by Toptics DL-100 semiconductor laser 1.For irradiating alkali
Atomic vapour in metal caesium -133 atomic vapour bubble 9, along the axle central transmission of magnetic shielding cylinder, when detection sample, 894
The deflection anglec of rotation of nm linearly polarized light beam 2 can provide the information of Weak magentic-field change.
Glan-thomson polariser 3, model ThorlabsGTH10M-B is it is ensured that the polarization of linearly polarized light beam 2, delustring
Than for 100000:1, support the use with laser instrument 1.
Electro-magnetic shielding cover 4, including copper mesh, high magnetic permeability paper tinsel and low magnetic permeability paper tinsel.Copper mesh model PSY406；High magnetic permeability
Paper tinsel model MSFHP；Low magnetic permeability paper tinsel model MSFLP.Outermost layer copper mesh is used for electrostatic field and frequency electromagnetic waves, middle floor height
Pcrmeability paper tinsel passes through absorption electromagnetic field and is redirected, and innermost layer low magnetic permeability paper tinsel has the spy of high saturated magnetic induction
Point, high flux high-intensity magnetic field of can decaying.Electro-magnetic shielding cover 4 can reduce electromagnetic interference and high-intensity magnetic field impact in environment, provides
The magnetic field shielding of wide scope.
Radio-frequency screening box 5, material is pure aluminum plate, and thickness is 3 mm.It can be alkali metal caesium -133 vapor atomic vapour bubble 9 work
Make to provide radio shielding, reduce RF fields.
Magnetic shielding cylinder 6, material is permalloy, and permalloy has very high low-intensity magnetic field permeability, shields earth's magnetic field etc.,
Working for atomic vapour bubble 9 provides an environment close to 0 or ultralow magnetic fields.
Axial field sweep coil 7, material is copper cash, is shaped as Helmholtz, produces and linearly polarized light beam 2 transmission direction phase
Same axial scan magnetic field.
Heating and thermal insulation module 8, including heating furnace, incubation cavity, for heating to alkali metal caesium -133 atomic vapour bubble 9
Insulation, to ensure to detect required alkali metal caesium -133 atom number density.Position relationship is：Atomic vapour bubble 9 is placed on heating
In heat preservation module 8, it is followed successively by heating furnace, incubation cavity outside atomic vapour bubble 9.Heating furnace material is zirconium oxide, zirconium oxide chemistry
Property torpescence and there is high-melting-point, high resistivity, high index of refraction, low thermal coefficient of expansion and the high property of heat conductivity；Insulation
Cavity material is polyimide foam, and heating furnace can be done with effective insulation.
Atomic vapour bubble 9, material is pyrex（Pyrex）Glass, inwall paraffin coating, interior is filled with alkali metal caesium -133
And a small amount of buffer gas nitrogen.Inner alkali metal caesium -133 steam of linearly polarized light beam 2 irradiated atoms vapour bubble 9 being 894 nm when wavelength
When, 894 nm linearly polarized light beams 2 can delicately sense alkali metal caesium -133 atomic vapour Weak magentic-field change that sample brings.
Light amplification detecting module 10, including a Thorlabs PBS052 polarizing beam splitter cube and a model
The balance light amplification detector of PDB220A2.Detect 894 nm linearly polarized light beams 2 by after alkali metal caesium -133 atomic vapour bubble 9
Polarization angle change.
Dispatch tube seals block 11, and material is politef.The environment of one closing is provided for dispatch tube 12, is designed with above
One lead fixing hole and an aperture importing or deriving air-flow.
Dispatch tube 12, material is lucite tube.For trough of belt loading pocket 15 electro-magnetic shielding cover 4 is outer and magnetic shielding cylinder 6
Steadily transmit between inner region.There is provided power by Pneumatic control module 16, enabling control trough of belt loading pocket 15 in dispatch tube
Move up and down in 12.
Solenoid coil 13, structure is the adjustable electromagnet of field intensity of annular diameter 40 mm, and magnetic field intensity scope is 0
～0.5 Tesla.For magnetizing sample.
Locating rack 14, for carrying mm scale aluminium profiles frame support.For fine adjustment dispatch tube 12 and alkali metal caesium -133 atom
The distance between vapour bubble 9（Typically 5 m）.Locating rack 14 includes horizontal support and the column being connected with horizontal support, horizontal
Sequentially pass through electro-magnetic shielding cover 4, radio-frequency screening box 5, magnetic shielding cylinder 6 and heating and thermal insulation module 8 to support one end to be positioned close to
The region of atom steam bubble 9, horizontal support is provided with scale, and dispatch tube 12 is arranged on horizontal support.
Trough of belt loading pocket 15, material is lucite.For loading testing sample.
As shown in figure 3, embodiment also includes Pneumatic control module 16, the first power supply 17, temperature control modules 18, data are adopted
Collection computer 19, second source 20.
Pneumatic control module 16 includes oil-free piston air compressor and multiplex vavuum pump of circulating water type, respectively trough of belt dress
Carrying storehouse 15 provides promotion air-flow and absorption vacuum environment.
First power supply 17, the precision voltage source of model DLM-60-10.Produce magnetostatic field and provide for solenoid coil 13 and stablize
Electric current.
Temperature control modules 18, for temperature survey, control and display are carried out to alkali metal caesium -133 atomic vapour bubble 9,
To ensure the atom number density of alkali metal caesium -133 atomic vapour bubble 9 work.
Data acquisition computer 19, the computer including Lenovo Qitian M6300 and NI 6230 data collecting card, for counting
According to collection, process and display, in apparatus of the present invention are implemented, obtain the dispersion of the nonlinear magnetism photoresonance that apparatus of the present invention produce
Signal.
Second source 20, the precision voltage source of model 6220.The electric current producing scanning is provided for axial field sweep coil 7.
A kind of device for material ferromagnetism and magnetization property detection of the present invention, connected mode is described in detail as follows：Electricity
Magnetic shielding cover 4 internal layer is radio-frequency screening box 5, then internal layer is magnetic shielding cylinder 6, alkali metal caesium -133 atomic vapour bubble 9 in magnetic shield
The center of cylinder 6；Heating and thermal insulation module 8 is wrapped in alkali metal caesium -133 atomic vapour bubble 9, is controlled by temperature control modules 18
System；Pneumatic control module 16 is sealed the gas port on block 11 by dispatch tube and is connected with the end of dispatch tube 12, trough of belt loading pocket 15
Slide in dispatch tube 12 interior orientation, dispatch tube 12 is fixed on localizer 14, and localizer 14 can adjust the position of dispatch tube 12；
First power supply 17 connects solenoid coil 13, provides the magnetic field of magnetization；Laser instrument 1 produces 894 nm linearly polarized light beams 2, successively
It is transmitted through Glan-thomson polariser 3, electro-magnetic shielding cover 4, radio-frequency screening box 5, magnetic shielding cylinder 6, axial field sweep coil 7, add
Hot heat preservation module 8, it is irradiated on alkali metal caesium -133 atomic vapour bubble 9, second source 20 connects axial field sweep coil 7, provides
To produce nonlinear magnetism photoresonance, 894 nm linearly polarized light beams 2 and alkali metal caesium -133 atom act on field sweep, the polarization of generation
Optically-active is detected by light amplification detecting module 10, finally has data acquisition computer 19 to carry out data sampling and processing and display.
A kind of device for material ferromagnetism and magnetization property detection that the present invention provides, the linear polarization that laser instrument produces
Light beam irradiated atoms vapour bubble, using the nonlinear magneto-optical effect dispersion producing that interacts of atomic vapour and linearly polarized light beam
Signal is as the distinguishing signal of standard；Adjust the spacing of transmission bottom of the tube and atomic vapour bubble in magnetic shielding cylinder using locating rack
From, it is possible to achieve the ferromagnetism of detection detected materials and magnetization property effectively；Heating and thermal insulation module material steeps for polyimides
Foam, while effective holding atomic vapour bubble temperature stabilization, also functions to necessarily absorb the effect of vibrations；Electro-magnetic shielding cover, penetrate
Frequency shielding box be effectively reduced electromagnetic field in environment, radio-frequency field interference and outside strong-electromagnetic field impact it is ensured that ferromagnetism and
The reliability that magnetization property detects.Compared to existing detection method and technology, the present invention is a kind of to be used for material ferromagnetism and magnetic
Change the detection method of performance and device utilizes non-linear magneto-optical resonance signal to act on, there is higher survey magnetic sensitivity（Reach pT ~ fT
Magnitude）.
As shown in figs 2-4, a kind of method for material ferromagnetism and magnetization property detection that the present invention provides, tool
Body is：
1）Material ferromagnetism detects, specific as follows：
[A] initial non-linearities magneto-optic resonance signal gathers：Detected materials are placed in trough of belt loading pocket 15, trough of belt loading pocket 15
Positioned at the arrival end of dispatch tube 12, there is no detected materials in magnetic shielding cylinder 6 in the region of atomic vapour bubble 9, measurement is made
The dispersion signal producing for the nonlinear magnetism photoresonance of standard.It is irradiated to using the 894 nm linearly polarized light beams 2 that laser instrument 1 produces
The atomic vapour bubble 9 of magnetic shielding cylinder 6 central area, axial field sweep coil 7 produces field sweep, the atom of polarization under field sweep effect,
The polarization direction of light can produce the rotation related to magnetic field, assumes nonlinear magnetism photoresonance, finally by light amplification detecting module 10
Measure the change of polarization signal light and obtain nonlinear magnetism photoresonance primary signal, nonlinear magnetism photoresonance of record is original
Signal.For example, a, nonlinear magnetism photoresonance primary signal in Fig. 4.
The signals collecting of [A] [C] original material：There is provided required power using Pneumatic control module 16 so that trough of belt
Loading pocket 15 can effectively be realized detected materials and deliver in magnetic shielding cylinder 6 close to the region of atomic vapour bubble 9 along dispatch tube 12 orientation,
Axial field sweep coil 7 is constantly in working condition and produces field sweep, the nonlinear magnetism photoresonance under the influence of detected materials of record
Signal, in contrast Fig. 4, a, nonlinear magnetism photoresonance primary signal are thus realize the detection of detected materials.For example, Fig. 4
Middle b, known non-magnetic material signal, c, the copper signal containing trace iron, d, the signal containing ferrimagnet.
2）Material magnetization performance detection, specific as follows：
The magnetization of [B] detected materials：There is provided required power using Pneumatic control module 16, drive trough of belt loading pocket 15 to treat
Material of measuring and monitoring the growth of standing timber is sent to region positioned at solenoid coil 13 along dispatch tube 12, opens the first power supply 17 and is energized to solenoid coil 13
Produce magnetic field, detected materials are carried out with magnetization a period of time（Typically 5 min）.
The signals collecting of [B] [C] Magnetized Material：Close the first power supply 17, drive again by Pneumatic control module 16
Trough of belt loading pocket 15 is transported to the search coverage in magnetic shielding cylinder 6 close to atomic vapour bubble 9, records magnetized detected materials in magnetic
The changes of magnetic field producing in shielding cylinder 6（Weak magentic-field changes）Impact to non-linear magneto-optical resonance signal, in contrast Fig. 4
A, nonlinear magnetism photoresonance primary signal are thus realize the detection of material magnetization performance.For example, in Fig. 4, d, material are magnetized
Signal afterwards.
Unloading for detected materials and replacing：Open the dispatch tube envelope block 11 on dispatch tube 12, take out trough of belt loading pocket
15, carry out unloading and the replacing of detected materials, then the trough of belt loading pocket 15 having changed new detected materials is put into dispatch tube
12, reinstall dispatch tube envelope block 11, carry out ferromagnetism and the magnetization property detection of material again.
According to the invention described above workflow, to one kind provided by the present invention for material ferromagnetism and magnetization property inspection
It is as follows that the method and apparatus surveyed makees additional notes：
In a kind of embodiment for material ferromagnetism and magnetization property detection method and device of the present invention, atomic vapour bubble 9
Inside it is filled with alkali metal caesium -133 atom, alkali metal caesium -133 atomic vapour bubble 9 needs to be positioned over center in magnetic shielding cylinder 6,
Ensure that alkali metal caesium -133 atomic vapour bubble 9 is operated in the Weak magentic-field environment of a requirement, be allowed to not be subject to the shadow in earth's magnetic field
Ring.Laser instrument 1 produces the linearly polarized light beam 2 of 894 nm wavelength, and the alkali metal caesium -133 being irradiated to magnetic shielding cylinder 6 central area is former
Sub- vapour bubble 9, alkali metal caesium -133 atom of polarization produces under field sweep effect in axial field sweep coil 7,894 nm line polarized lights
The polarization direction of bundle 2 can produce the rotation related to magnetic field, assumes nonlinear magnetism photoresonance, finally by light amplification detecting module 10
Measure the change of polarization signal light of 894 nm wavelength and obtain non-linear magneto-optical resonance signal.Using Pneumatic control module 16
Required power is provided, trough of belt loading pocket 15 delivers to detected materials orientation in magnetic shielding cylinder 6, close to atomic vapour bubble 9 spy
Survey region, axial field sweep coil 7 is constantly in working condition and produces field sweep, obtains linearly polarized light beam by light amplification detecting module 10
2 optically-active signal, contrast primary signal is thus realize the ferromagnetism detection of material.
A kind of detection method for material ferromagnetism and magnetization property that the present invention provides, it is possible to achieve detected materials are fixed
Position sample introduction, ferromagnetism detection and magnetization detection.Using laser instrument produce linearly polarized light beam irradiated atoms vapour bubble, polarization former
Under the effect of axial field sweep, the polarization direction of linearly polarized light beam can produce the rotation related to magnetic field to son, measures linearly polarized light beam
Change, obtain as standard non-linear magneto-optical resonance signal；Nonlinear magneto-optical effect signal has extremely narrow live width, and right
Magnetic-field-sensitive, therefore has highly sensitive magnetic field detection ability.Then, detected materials orientation is delivered to magnetic shielding cylinder inner region
Domain, the region close to atomic vapour bubble, the Weak magentic-field change whether detection material produces in magnetic shielding cylinder；Then, will treat
Line solenoid collar region delivered to by material of measuring and monitoring the growth of standing timber, and the magnetization detected materials that are energized, and again detected materials orientation is delivered to magnetic shielding cylinder
The interior, region close to atomic vapour bubble, whether recording materials have, no ferromagnetism and its non-linear magneto-optical resonance signal is produced
Impact, thus realized the detection whether material can be magnetized.If measurement is in ferromagnetism, weak magnetic, non-thread can be made
Property magneto-optic resonance signal occur abnormal, thus realizing the detection of material examination.
Specific embodiment described herein is only explanation for example to present invention spirit.The affiliated technology of the present invention is led
The technical staff in domain can be made various modifications or supplement or replaced using similar mode to described specific embodiment
Generation, but the spirit without departing from the present invention or surmount scope defined in appended claims.
Claims (8)
1. a kind of device for material ferromagnetism and magnetization property detection, including laser instrument（1）It is characterised in that also including
Electro-magnetic shielding cover（4）, be arranged on electro-magnetic shielding cover（4）Interior radio-frequency screening box（5）, be arranged on radio-frequency screening box（5）Interior magnetic
Shielding cylinder（6）, be arranged on magnetic shielding cylinder（6）Interior heating and thermal insulation module（8）And it is arranged on heating and thermal insulation module（8）Interior is former
Sub- steam bubble（9）, laser instrument（1）The linearly polarized light beam of outgoing（2）Incide atom steam bubble through polariser（9）Afterwards by light amplification
Detecting module（10）Detection, magnetic shielding cylinder（6）Inside it is provided with for generation and linearly polarized light beam（2）Transmission direction identical is axially
The axial field sweep coil of scanning magnetic field（7）, dispatch tube（12）One end sequentially passes through electro-magnetic shielding cover（4）, radio-frequency screening box（5）、
Magnetic shielding cylinder（6）With heating and thermal insulation module（8）It is positioned close to atom steam bubble（9）Region, dispatch tube（12）The other end sets
It is equipped with dispatch tube envelope block（11）And and Pneumatic control module（16）Connect, dispatch tube（12）Inside it is provided with trough of belt loading pocket（15）,
Dispatch tube（12）On be arranged with solenoid coil（13）, solenoid coil（13）With the first power supply（17）Connect, axial field sweep line
Circle（7）With second source（20）Connect.
2. a kind of device for material ferromagnetism and magnetization property detection according to claim 1 is it is characterised in that institute
The heating and thermal insulation module stated（8）Including heating furnace and incubation cavity, atom steam bubble（9）It is arranged on insulation intracavity, heating furnace is arranged
In atom steam bubble（9）And incubation cavity between.
3. a kind of device for material ferromagnetism and magnetization property detection according to claim 2 is it is characterised in that institute
The material of the heating furnace stated is zirconium oxide, and the material of incubation cavity is polyimide foam.
4. a kind of device for material ferromagnetism and magnetization property detection according to claim 1 is it is characterised in that go back
Including locating rack（14）, locating rack（14）The column be connected including horizontal support and with horizontal support, horizontal support one end is successively
Through electro-magnetic shielding cover（4）, radio-frequency screening box（5）, magnetic shielding cylinder（6）With heating and thermal insulation module（8）It is positioned close to atom to steam
Steam bubble（9）Region, horizontal support is provided with scale, dispatch tube（12）It is arranged on horizontal support.
5. a kind of device for material ferromagnetism and magnetization property detection according to claim 1 is it is characterised in that institute
The atomic vapour bubble stated（9）Inwall is provided with paraffin coating.
6. a kind of device for material ferromagnetism and magnetization property detection according to claim 1 is it is characterised in that institute
The dispatch tube envelope block stated（11）Material is politef, and dispatch tube seals block（11）On offer gas port, described dispatch tube
（12）Material is lucite.
7. a kind of device for material ferromagnetism and magnetization property detection according to claim 1 is it is characterised in that institute
The solenoid coil stated（13）Magnetic field intensity scope be 0～0.5 Tesla.
8. a kind of utilize described in claim 1 be used for material ferromagnetism and magnetization property detection device carry out material ferromagnetism and
The method of magnetization property detection is it is characterised in that comprise the following steps：
Step 1, the detection of detected materials ferromagnetism, specific as follows：
Step 1.1, the collection of initial non-linearities magneto-optic resonance signal：Detected materials are placed on trough of belt loading pocket（15）In, trough of belt
Loading pocket（15）Positioned at dispatch tube（12）Arrival end, in magnetic shielding cylinder（6）Interior close to atomic vapour bubble（9）Region in do not have
Detected materials, using laser instrument（1）The 894 nm linearly polarized light beams producing（2）It is irradiated to atomic vapour bubble（9）, axial field sweep line
Circle（7）Produce field sweep, 894 nm linearly polarized light beams（2）Through atomic vapour bubble（9）Afterwards by light amplification detecting module（10）Measure
The change of polarization signal light and obtain nonlinear magnetism photoresonance primary signal；
Step 1.2, the signals collecting of original material：Using Pneumatic control module（16）By trough of belt loading pocket（15）Along dispatch tube
（12）Orientation delivers to magnetic shielding cylinder（6）Interior close to atomic vapour bubble（9）Region, axial field sweep coil（7）It is constantly in work
State produces field sweep, the non-linear magneto-optical resonance signal under the influence of record time detected materials；
Step 2, material magnetization performance detection：
Step 2.1, the magnetization of detected materials：Using Pneumatic control module（16）Drive trough of belt loading pocket（15）Detected materials edge
Dispatch tube（12）It is sent to positioned at solenoid coil（13）Region, open the first power supply（17）To solenoid coil（13）Energising
Produce magnetic field, detected materials are magnetized；
Step 2.2, the signals collecting of Magnetized Material：Close the first power supply（17）, again by Pneumatic control module（16）Drive
Trough of belt loading pocket（15）It is transported to magnetic shielding cylinder（6）Interior close to atomic vapour bubble（9）Region, record magnetized detected materials and exist
Magnetic shielding cylinder（6）The impact to non-linear magneto-optical resonance signal for the changes of magnetic field of interior generation.
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