A kind of specific susceptibility determinator
Technical field
The present invention relates to a kind of equipment for determining material specific susceptibility, the ratio magnetization system of weak magnetic substance is particularly determined
Number.Instrument automatically adjusts magnetic field intensity, automatic control survey mechanism, automatic data collection measurement data, automatic calculation process, automatic aobvious
Show measurement result, automatically generate measurement image coordinate and complete determination report.
Background technology
Specific susceptibility is exactly magnetic moment of the ore particle of unit mass produced by the external magnetic field of unit strength.It can be more true
Represent the magnetic of object with cutting.Susceptibility whether there is unpaired electron and complex structure type in material molecule is judged
In terms of there is important application, the measure magnetization that is related in two subjects of physics and the structure of matter simultaneously of susceptibility is strong
The physical quantitys such as degree, magnetic induction intensity, magnetic field intensity, molecular magnetic moment.Specific susceptibility is used as one of the strong and weak parameter of magnetic mineral
Important physical amount, plays considerable effect, the ratio that wherein process mineralogy research is provided during mineral processing magnetic separation
Susceptibility data can gear to actual circumstances from magnetically reflect and explain ore in behavior of each mineral during specific magnetic separation,
This require specific susceptibility can fast, the simple, measure of system.The measurement that specific susceptibility can independently be determined at present is set
It is standby and few, including the vibrating example of magnetic balance, simple specific susceptibility determinator and indirect determination specific susceptibility
Magnetometer.
Magnetic balance and simple specific susceptibility determinator directly measure material specific susceptibility using matter dynamic method
Instrument, though material specific susceptibility can be determined, has that substance testing scope is small, mechanical test error big, test week
The low weak point of phase length, measuring accuracy.The VSM series and Japan that the U.S. is developed develop the serial vibrating specimen magnetometers of BHV
According to sample magnetic field space magnetic effect come indirect determination material susceptibility, this device is treated using vibrational system suspension
Material is surveyed, testing sample internal volume structure is destroyed to a certain extent with stability with overall, reduces survey
The accuracy of examination;Meanwhile, the superelevation vibration frequency needed for vibrating device is difficult to control, and makes control and the accuracy of data acquisition of measurement
It is affected, and vibrating specimen magnetometer test result directly includes material specific susceptibility parameter, it is impossible to directly generate magnetic field
Intensity-specific susceptibility, magnetic field intensity-specific magnetization image coordinate;Vibrating specimen magnetometer is in high magnetic field intensity environment
Lower test also needs to additional cooling system, on the one hand can increase occupation area of equipment, on the other hand increase energy resource consumption and maintenance
Expense;Vibrating specimen magnetometer has expensive serious problems, the limitation limitation of application as import equipment
The progress of domestic specific susceptibility research work.Therefore, for existing Testing of specific susceptibility pertinent instruments deficiency and deposit
The problem of, invented a kind of instrument for automatically determining material specific susceptibility.
The content of the invention
The present invention is aiming at mechanics law in problem present in above-mentioned related specific susceptibility determining instrument and magnetic field
Invention.
According to mechanics law in magnetic field, the magnetic force acted on particle can be write as
F in formula1The magnetic force that-particle is subject in magnetic field;
μ0- space permeability;
The mass volume magnetic susceptibility of k-particle;
The volume of V- particles;
The volume element of dV-particle
Magnetic field intensity in H-particle volume.
Symbol grad is included in integration type, and assumes that volume susceptibility is constant in the scope shared by particle, then
When particle size is little, it may be assumed that HgradH change is little in the volume occupied by it.So, HgradH can
To move on to integration extra, then f1It will be written as
f1=μ0κVHgradH (3)
Through conventional than magnetic force (N/kg) in magnetic separation.It is the magnetic force acted on unit mass particle, i.e.,
F in formula1- compare magnetic force;
The quality of m-particle, kg;
The density of ρ-particle;
χ0The object specific susceptibility of-particle,m3/kg;
HgradH-magnetic field force, A2/m3。
From formula (4),
So mineral specific susceptibility χ0Measure, indirect reformer is f1, m, HgradH measure.
The specific susceptibility determinator of invention design is using Central Symmetry annulus corner cut formula field core and circular arc excitation
There is provided the high magnetic field gradients gradH needed for material Testing of specific susceptibility, its middle ring for the magnetic system structure design that coil is combined
The shape center corner cut number of degrees are generally 15~45 °, and there is provided the space magnetic field intensity that material specific susceptibility is accurately measured.
Magnetic system structure design breaks through cylindricality magnetic pole head boundary so that magnetic field intensity and magnetic field gradient in electromagnetism excitation system
It can be surveyed in the vector change of vertical direction, the material of the measure in the short period of time specific susceptibility that this instrument can be intelligent is simultaneously
Automatically generate a complete test report.
Sample to be tested is produced according to requirement is determined, it is determined that including test model, change of magnetic field strength scope, magnetic field intensity
Automatically adjust the test condition including step-length, flux control precision and result display precision.
According to formula (5), specific susceptibility determinator coordinates automatic measurement software systems control digital measurement mechanism automatic
Weigh empty sample loader weight m1, remove sample loader dress and take sample suspension arrangement is installed back after sample to be measured, software system
The full sample loader weight m of system control digital measurement mechanism automatic weighing2, system calculates sample quality m=m automatically1-m2, by measure
Required magnetic field environment system automatically adjusts space magnetic field power, i.e. HgradH where sample.System automatic data collection is via magnetic field intensity
The digital information of measuring mechanism transmission is simultaneously recorded in operation program, and system can realize that magnetic field intensity fixed point or magnetic field intensity are walked automatically
Long interval measurement material specific susceptibility.Weak magnetic substance and middle magnetisable material Testing of specific susceptibility require that magnetic system iron core is kept
Under small spacing condition, to ensure that excitation mechanism can provide higher magnetic field intensity and magnetic field ladder needed for weak magnetic mineral is determined
Degree;Ferromagnetic substance Testing of specific susceptibility requires that magnetic system iron core is maintained under big spacing condition, the magnetic field needed for ensureing to determine
Magnetic system iron core spacing is increased under conditions of intensity as far as possible, and then reduces magnetic of the strongly magnetic mineral material under higher magnetic field environment
Change degree.Testing of specific susceptibility system ensure mensuration program it is stable while, system interface automatic synchronization display test
As a result with measure image coordinate, user's alternative is preserved, output, and printing measurement result file or complete determination are reported.
The present invention is adopted the following technical scheme that:
A kind of specific susceptibility determinator, mainly include electromagnetism excitation system, measurement support meanss, digital measurement mechanism,
Digital magnetic field intensity measuring mechanism, sample suspension arrangement, electrical control gear and automatic measurement software systems.
Described electromagnetism excitation system is by magnetic system seat, multifunctional universal castor, magnetic conduction jaw, circular arc magnet exciting coil, circle
Arc field core, magnetic system Rapid adjustment mechanism and level meter are constituted, wherein circular arc field core and circular arc magnet exciting coil
Design breakthrough cylindricality boundary, the design being combined using Central Symmetry annulus corner cut formula field core with circular arc magnet exciting coil,
It ensure that circular arc magnetic system structure is produced while the high magnetic field intensity needed for realizing accurate measure material specific susceptibility
Higher magnetic field gradient, the stress of the vertical direction where the more large sample of general angle of inclination is bigger, but when angle is big to one
When determining degree, magnetic field gradient is reduced again, so suitable magnetic system iron core angle and magnetic field gradient are to ensure sample in space magnetic
Field uniform force, easily survey, accurately key, this magnetic system iron core angle scope of design is at 15 °~45 °, and this angular range is in guarantee
The magnetic field gradient of sample space magnetic field environment is in turn ensure that needed for test while magnetic field intensity;Magnetic system Rapid adjustment mechanism by
Iron core hollow shaft, gland, rotary handle composition, iron core is fixed in iron core hollow shaft by key fit system, by gland to sky
Mandrel interior is closed, adjust rotary handle, can quick regulation magnetic system iron core spacing, by adjust rotary handle adjust magnetic system
Iron core spacing, realizes significantly space magnetic field intensity and magnetic field gradient needed for control Testing of specific susceptibility manually.
The multifunctional universal castor for having Level tune function concurrently is installed in described measurement support meanss bottom corner, and instrument is needed
The convenience of universal caster wheel movement can be played when moving, when regulation measurement support meanss level, rearmounted function universal caster wheel
Spiral support level(l)ing device work;Measure the coordinate regulation dress that support meanss upper face installs digital measurement mechanism
Put, digital measurement mechanism movement track and level meter, wherein digital measurement mechanism movement track contribute to digital measurement machine
The front and back position of structure is significantly moved, and the coordinate adjusting means of digital measurement mechanism contributes to digital measurement mechanism three-dimensional coordinate
Accurate adjustment, to ensure that sample suspension arrangement is located at magnetic system center, it is ensured that the accuracy of Testing of specific susceptibility.
Described digital measurement mechanism include be built in measuring mechanism high accuracy number measurement movement, digital circuit board and
The power supply and data transmission terminal of mechanism are placed on, wherein high accuracy number measurement movement can detect 0.0001g mass change,
The connection that the power control terminal of mechanism box, data transmission terminal are easy to data wire is placed on, measurement data can pass through data transmission terminal
It is quick be transferred to PC ends analyzed, computing and processing.
Described digital magnetic field intensity measuring mechanism is by a numerical monitor magnetic field intensity measuring instrument main frame and is placed in magnetic system
The self calibration hall probe composition of core center.Digital magnetic field intensity measuring instrument has peak value lock function, magnetic field space temperature
Display function, many unit of magnetic field strength display functions and automatic relative/Absolute geomagnetic field calibration function, built in self calibration hall probe
Temperature sense original paper, in real time monitoring magnetic field space ambient temperature value, and real-time Data Transmission to PC ends.
Described sample suspension arrangement is made up of attachment means and sample loader, and this attachment means and sample loader are adopted
It is made of macromolecule polymeric material, space magnetic field environment is not influenceed, it is to avoid sample loader own material is tied to determining
The influence of fruit.
380V ac power input ends, self-shield air gap switch built in described electrical control gear, AC transformer,
Electric rectification module, digital magnetic field intensity measuring instrument, remote control module, analog voltage transport module, external excitation con-trol are pressed
Button, demagnetization control button, status indicator lamp, scene/remote control switch, magnetic field intensity hand regulator and synchronization parameter numeral
Display screen;The DC voltage that circular arc magnet exciting coil input ceiling voltage is 120V, the maximum electricity of control circular arc magnet exciting coil
Flow for 12.0A, magnetic field intensity reaches as high as 2.0T, it is ensured that determine the variable magnetic field intensity needed for specific susceptibility.
Described automatic measurement software systems can calibrate magnetic field intensity automatically, automatically control digital measurement mechanism, automatic control
Digital magnetic field intensity measuring mechanism, automatic data collection real time data are made, measurement result is shown automatically, image coordinate is drawn automatically, its
Middle automatic measurement software systems are connected or usb data connection remote control and transmitting digital information by RS2332 serial ports, automatically
Each port communication state of measuring software system interface simultaneous display, digital measurement mechanism real time data, test environment temperature, compare magnetic
Change coefficient determination result, magnetic field intensity-specific susceptibility, the magnetic field intensity-direct image coordinate of specific magnetization plane, automatically
Measuring software system can be exported selectively, printing test file and test report.
Using above-mentioned technical proposal the present invention compared with prior art, can directly and automatically determine material than magnetization system
Number, Testing of specific susceptibility value precision may be up to 1.0 × 10-9m3/ kg, magnetic system mechanism is adjustable circular arc magnet exciting coil manually
Design, the multiregion that can adapt to ferromagnetic substance, weak magnetic substance and namagnetic substance is determined;The control of magnetic field intensity and tune
Section is divided into electrical control gear, and regulation and software systems automatically adjust two ways manually, can be applicable the ratio magnetic under a variety of environment
Change coefficient determination;Digital measurement mechanism and magnetic field intensity measuring mechanism using digital high accuracy data transmission technology, instead of with
Toward the manual count and manual computing mode of specific susceptibility determinator device, the test period of existing relevant device is shortened.This
Invention is low to test material conditions dictate degree, and test substances state can be divided into liquid and powdered;With existing relevant device phase
Than this instrument price is cheap;With VSM series, the serial vibrating specimen magnetometers of BHV and simple specific susceptibility determinator, machinery
Formula magnetic balance is compared, and the present invention can be commonly applied to related scientific research machine as simple in construction and easy-operating determining instrument
Structure, Scientific Research in University Laboratory etc..
Brief description of the drawings:
Fig. 1, Fig. 2, Fig. 3 are the structural representations of the present invention.
Embodiment:
Below in conjunction with the accompanying drawings and embodiment be described in detail the present invention:
A kind of specific susceptibility determinator, including low electromagnetism excitation system 25, measurement support meanss 11, digital measurement mechanism
2nd, digital magnetic field intensity measuring mechanism, sample suspension arrangement 3, electrical control gear 35 and automatic measurement software systems.
Described electromagnetism excitation system 25 is by magnetic system seat 16, multifunctional universal castor 17, magnetic conduction jaw 12, circular arc excitation
Coil 5, circular arc field core 4, magnetic system Rapid adjustment mechanism 6 and level meter 14, which are fixed, to be constituted.Wherein, magnetic system seat 16 is empty van
On the one hand formula magnetic system seat, empty van formula design reduces instrument own wt, has on the other hand reserved gadget parking space, circular arc
The terminal plate of shape magnet exciting coil 5 is built in magnetic system seat empty van, and power line input hole 7 is separately designed in the both sides of magnetic system seat-box body,
Inlet wire input hole can be selected according to power line orientation;Multifunctional universal castor 17 is used to be moved easily and be easy to Level tune and mutually tied
The design of conjunction, multifunctional universal castor 17 is equipped with liftable support base, rises support base during Mobile electromagnetic excitation system 25, Gu
When determining the regulation magnetic system level of electromagnetism excitation system 25, the multifunctional universal castor 17 of 16 bottoms of magnetic system seat can be arranged on by adjusting
Support base coordinates the level of the regulation electromagnetism of level meter 14 excitation system 25;The closure of magnetic conduction jaw 12 is fixed on magnetic system seat 16, is selected
The magnetic conductive material of super-magnetic conducting performance, substantially reduces the leakage field of magnetic field space;Circular arc magnet exciting coil 5 is realized scattered from cooling down
Heat, temperature rise may be up to 100 DEG C, it is ensured that the stability of highfield lower coil functional performance;Circular arc field core 4 uses center
Symmetrical annulus corner cut formula field core design, is realizing the same of the accurate high magnetic field intensity determined needed for material specific susceptibility
When ensure that circular arc magnetic system structure produces higher magnetic field gradient, the angle scope of design of circular arc field core 4 15 °~
45 °, this angular range in turn ensure that the magnetic field ladder of sample space magnetic field environment while magnetic field intensity needed for ensure that test
Degree, the zinc-plated processing in the surface of circular arc field core 4, be prevented effectively from because it gets rusty influence service behaviour the problem of;Magnetic system is quick
Adjustment mechanism 6 is made up of iron core hollow shaft, rotary handle 15, and it is empty that circular arc field core 4 is fixed on iron core by key fit system
On heart axle, hollow shaft inside is closed by gland, rotary handle 15 is adjusted, can quick regulation circular arc field core 4
Spacing, realization is manual, significantly control space magnetic field intensity and magnetic field gradient needed for Testing of specific susceptibility.
Described digital measurement mechanism 2 includes being built in the high accuracy number measurement movement 21 of digital measurement mechanism 2, numeral
Circuit board 22 and the power supply and data transmission terminal 20 for being placed on digital measurement mechanism 2, wherein high accuracy number measurement movement 21 can
0.0001g mass change is detected, the power supply and data transmission terminal 20 for being placed on digital measurement mechanism are easy to the company of data wire
Connect, measurement data can be quickly transferred to by data transmission terminal PC ends analyzed, computing and processing.
The multifunctional universal castor 17 the same with magnetic system base is installed in the described bottom corner of measurement support meanss 11, can be real
Now move and regulation level double item functions, measurement support meanss 11 upper face installs the high-precision XY axles of digital measurement mechanism 2
Coordinate adjusting means 9, high-precision Z-axis micromatic setting 1 and level meter 23 are constituted, and wherein digital measurement mechanism 2 is located at digital measurement
Among the moving track 24 of mechanism, it is easy to significantly move forward and backward in digital measurement mechanism 2, moving track and is adjusted provided with 4 levels
Knob 10 is saved, is used cooperatively with level meter 23, for adjusting measuring mechanism level.
Described digital measurement mechanism 2 includes being built in the high accuracy number measurement movement 21 of measuring mechanism, digital circuit
Plate 22 and the data transmission terminal 20 for being placed on mechanism, digital information are quickly transferred to PC ends by data transmission terminal 20 and divided
Analysis, computing and processing.
Described digital magnetic field intensity measuring mechanism is by a number of units word magnetic field intensity measuring instrument 33 and is placed in circular arc excitation
The self calibration hall probe 18 of iron core 4 is constituted, wherein digital magnetic field intensity measuring instrument 33 is built in electrical control to save space
In device 35.Digital magnetic field intensity measuring instrument 33 has peak value lock function, magnetic field space temperature display function, many magnetic field intensities
Unit display function and automatic relative/Absolute geomagnetic field calibration function, the built-in temperature of self calibration hall probe 18 sensing original paper, in real time
Monitor magnetic field space ambient temperature value, PC ends are controllable and the digital magnetic field intensity measuring mechanism of regulation and by the numeral collected
Information is transferred to PC ends by serial communication end.
Described sample suspension arrangement 3 includes attachment means 41 and sample loader 13, is adopted to mitigate its own weight
Processed with macromolecule polymeric material, meanwhile, macromolecule polymeric material does not influence on space magnetic field environment, at utmost keeps away
Influence of the sample loader own material to measurement result is exempted from.
Described electrical control gear 35 is handed over by built-in 380V ac power input ends 39, self-shield air gap switch 34
Convertor transformer 40, electric rectification module 38, remote control module 37, analog voltage transport module 36 and digital magnetic field intensity measurement
Instrument 33, external excitation con-trol button 30, demagnetization control button 31, magnetic field intensity hand regulator 32, synchronization parameter numerical monitor
Screen, long-range/field control switch 25, status indicator lamp are constituted.Synchronization parameter digital display screen is by voltage display screen 27
Constituted with electric current display screen 26.Status indicator lamp is made up of excitation indicator lamp 29 and demagnetization indicator lamp 28.Circular arc excitation wire
5 input voltages are enclosed for 120V DC voltages, it is 12.0A to control the maximum current of circular arc magnet exciting coil 5, it is ensured that determined than magnetization
Variable magnetic field intensity and magnetic field gradient needed for coefficient;When closing self-shield air gap switch 34, electrical control gear 35 is opened
It is dynamic, when pressing excitation con-trol button 30, excitation turn-on power loss is realized, now excitation indicator lamp 29 is lighted, press demagnetization button 31
When, control circular arc magnet exciting coil 5 is demagnetized, and the indicator lamp 28 that now demagnetizes is lighted, and long-range/field control switch 25 can realize scene
With the free switching of distance control mode, adjusted manually when specific susceptibility is measured under on-site manual pattern by adjusting magnetic field intensity
Section device 32 can easily realize the size of current of coil, and then realize the manual regulation of magnetic field intensity.
Described automatic measurement software systems can calibrate magnetic field intensity automatically, automatically control digital measurement mechanism, automatic control
Digital magnetic field intensity measuring mechanism, automatic data collection real time data are made, measurement result is shown automatically, image coordinate is drawn automatically, its
Middle automatic measurement software systems are connected or usb data connection remote control and transmitting digital information by RS2332 serial ports, automatically
Measuring software system can set test model, change of magnetic field strength scope, magnetic field intensity and automatically adjust step-length, flux control precision
Test parameter inside, each port communication state of interface simultaneous display, digital measurement mechanism real time data, test environment temperature,
Testing of specific susceptibility result, magnetic field intensity-specific susceptibility, magnetic field intensity-specific magnetization plane rectangular coordinates image,
Automatic measurement software systems can be exported selectively, printing test file and test report.
Described specific susceptibility determinator is come the method that determines material specific susceptibility, and step is as follows:
1. connecting all installation's power sources, data line is connected by regulation, automatic measurement software system is installed at PC ends
System.
2. closure self-shield air gap switch 34, digital measurement mechanism 2, digital magnetic field intensity measuring mechanism 35 are switched, beat
Open automatic measurement system.
3. calibration digital measurement mechanism 2, digital magnetic field intensity measuring mechanism 35, circular arc is adjusted by requirement is determined on request
It is automatic under the spacing of shape magnet exciting coil 5, software systems to carry out magnetic field control amendment.
4. the empty sample loader quality of automatic measurement sealing, sample is removed by rotary sample suspension arrangement under software systems
Loader, dress, which takes, has produced testing sample, and sample suspension arrangement is installed back after sealing.
5. under software systems, the full sample loader quality of automatic measurement, it is to be measured finish after, will by Testing of specific susceptibility
Ask the survey set including test model, change of magnetic field strength scope, magnetic field intensity automatically adjust step-length, flux control precision
Strip part, starts to determine after being provided with.
6. under software systems, automatically determining sample specific susceptibility, determination data, test image are preserved, is exported in detail
Than magnetization measurement result report.