CN2779420Y - Measurement apparatus for magnetic susceptibility of trace quantity weak magnetic substance - Google Patents
Measurement apparatus for magnetic susceptibility of trace quantity weak magnetic substance Download PDFInfo
- Publication number
- CN2779420Y CN2779420Y CN 200520055301 CN200520055301U CN2779420Y CN 2779420 Y CN2779420 Y CN 2779420Y CN 200520055301 CN200520055301 CN 200520055301 CN 200520055301 U CN200520055301 U CN 200520055301U CN 2779420 Y CN2779420 Y CN 2779420Y
- Authority
- CN
- China
- Prior art keywords
- magnetic
- oscillator
- detection head
- coil
- magnetic susceptibility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 57
- 238000005259 measurement Methods 0.000 title claims description 14
- 239000000126 substance Substances 0.000 title abstract description 6
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 14
- 239000000696 magnetic material Substances 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000003534 oscillatory effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000005404 magnetometry Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The utility model relates to a device for measuring magnetizing rate of weak magnetic substance in trace quantity, which is composed of a detector head and an inductance measuring circuit. The detector head comprises a semi-closed magnetic core made of ferromagnetic material and a coil which is sleeved on the magnetic core; both ends of the semi-closed magnetic core serve as magnetic poles and are made into sharp shape, and two sharp magnetic poles are opposite closely; a tiny space between the two sharp magnetic poles serves as a sample chamber. The utility model has the advantages of high sensitivity and small size, and the utility model is suitable for measuring the magnetizing rate of the weak magnetic substance in trace quantity.
Description
Technical field
The utility model relates to a kind of device of measurement of species magnetic susceptibility.
Background technology
Magnetic susceptibility is determined at aspects such as rerum natura research, magnetochemistry, grade of ore analysis, soil investigation, archaeology and environmental monitoring and has crucial meaning.Present magnetic susceptibility determinator have Britain MS-2, Czech KLY-2, Nanjing Di Kuang HKB-1, the kappameters such as WCL-1 of Beijing geological instrument factory.These kappameters are taked the electromagnetic coupled principle mostly, or use the gradient magnetic method, and the insufficient sensitivity height is measured weak magnetic substance and had any problem; Add that the space, sample chamber is bigger, be not suitable for measuring the micro-example in the magnetochemistry research.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of device of suitable micro-weak magnetic substance magnetic susceptibility measurement is provided.
The utility model is made up of detection head and inductance measurement circuit.
Detection head comprises ferromagnetic material semi-closure magnetic core of making and the coil that is placed on the magnetic core.The two ends of semi-closure magnetic core are as magnetic pole, make pointedly, and two pointed magnetic poles are closely relative.Short space between two pointed magnetic poles is as the sample chamber.
Inductance measurement adopts following technical scheme:
Scheme 1 difference frequency type inductance measurement
A detection head coil and an ac oscillator circuit, promptly exciting circuit connects; Other is provided with an ac oscillator circuit as the reference oscillatory circuit; The output terminal of exciting circuit and reference oscillatory circuit is access to the input end of mixting circuit respectively, and this mixting circuit is obtained the difference frequency signal of exciting circuit and reference oscillatory circuit as the difference frequency device by its output terminal; The difference frequency signal of difference frequency device output is changed through frequency-voltage conversion circuit, amplifies through amplifying circuit again, is access to microprocessor or other display device, obtains sample magnetic susceptibility data.
Detection head coil one end is connected with an ac oscillator circuit, and the other end is connected with current-voltage conversion circuit or addition and subtraction circuit; The voltage of current-voltage conversion circuit or addition and subtraction circuit output amplifies through amplifying circuit, again through the rectification circuit rectification, is access to microprocessor or other display device, obtains sample magnetic susceptibility data.
That advantage of the present utility model is is highly sensitive, volume is little, is suitable for micro-weak magnetic substance magnetic susceptibility measurement.
Description of drawings
Fig. 1 is the structural representation of detection head of the present utility model.
Fig. 2 is a difference frequency type inductance measurement device circuit diagram of the present utility model.
Fig. 3 is the current type inductance measurement device circuit diagram of wooden utility model.
Among the figure, 1 is magnetic core, and 2 is coil, and 3 is the short space between two pointed magnetic poles, as the sample chamber; 4 is driving oscillator, and 5 is the reference oscillator, and 6 is frequency mixer, i.e. difference frequency device, and 7 is frequency-voltage converter, 8 is amplifier; 9 for exchanging oscillator, and 10 is current-voltage converter or plus and minus calculation device, and 11 is amplifier, and 12 is rectifier.
Embodiment
See figures.1.and.2, the utility model is made up of detection head and inductance measurement device.Detection head comprises the semi-closure magnetic core (1) that ferromagnetic material is made and is placed in coil (2) on the magnetic core.The two ends of semi-closure magnetic core are as magnetic pole, make pointedly, and two pointed magnetic poles are closely relative.Short space (3) between two pointed magnetic poles is as the sample chamber.
The area of two pointed magnetic poles is 0.2～4mm
2The distance of two interpolars is 0.05～2mm.
In the inductance measurement device, a detection head coil (2) and an ac oscillator circuit, promptly driving oscillator (4) connects; Other is provided with an ac oscillator circuit as reference oscillator (5); Driving oscillator (4) is access to difference frequency device (6) respectively with the output terminal of reference oscillator (5), is obtained the difference frequency signal of exciting circuit and reference oscillatory circuit by its output terminal; The difference frequency signal of difference frequency device (6) output amplifies output through amplifier (8) again through frequency-voltage converter (7) conversion, is access to microprocessor or other display device, obtains sample magnetic susceptibility data.
Fig. 3 is another kind of inductance measurement device.One end of detection head coil (2) is connected with interchange oscillator (9), and the other end of coil (2) is connected with current-voltage converter or plus and minus calculation device (10); The output termination amplifier (11) of current-voltage converter or plus and minus calculation device (10), the output termination rectifier (12) of amplifier (11).Through rectifier (12) rectification, be access to microprocessor or other display device, obtain sample magnetic susceptibility data.
During working sample magnetic susceptibility, testing sample is placed short space between two pointed magnetic poles, semi-closure magnetic core and sample constitute flux loop.The inductance value of detection head is directly proportional with magnetic susceptibility.Under the effect of exciting circuit, the frequency of this oscillatory circuit is relevant with the magnetic susceptibility of sample.After the frequency mixing of this oscillation frequency and reference oscillatory circuit, the frequency of gained difference frequency signal is directly proportional with the magnetic susceptibility of sample.Difference frequency signal is after frequency-voltage conversion circuit conversion, and the signal magnitude of gained is directly proportional with magnetic susceptibility.
Claims (5)
1, the weak magnetic material magnetic susceptibility determinator of a kind of trace comprises detection head and inductance measurement device, it is characterized in that: semi-closure magnetic core (1) that detection head is made by ferromagnetic material and the coil (2) that is placed on the magnetic core are formed; The two ends of semi-closure magnetic core (1) are as magnetic pole, make pointedly, and two pointed magnetic poles are relative; Space (3) between two pointed magnetic poles is as the sample chamber.
2, the weak magnetic material magnetic susceptibility determinator of trace according to claim 1, it is characterized in that: the area of two pointed magnetic poles is 0.2～4mm
2
3, the weak magnetic material magnetic susceptibility determinator of trace according to claim 1, it is characterized in that: the distance between two pointed magnetic poles is 0.05～2mm.
4, the weak magnetic material magnetic susceptibility determinator of trace according to claim 1, it is characterized in that: in the inductance measurement device, detection head coil (2) is connected with driving oscillator (4); Other is provided with reference oscillator (5); Driving oscillator (4) is access to difference frequency device (6) respectively with the output terminal of reference oscillator (5); Difference frequency device (6) output terminal is access to frequency-voltage converter (7), and frequency-voltage converter (7) output terminal is access to amplifier (8).
5, the weak magnetic material magnetic susceptibility determinator of trace according to claim 1, it is characterized in that: in the inductance measurement device, one end of detection head coil (2) is connected with interchange oscillator (9), and the other end of coil (2) is connected with current-voltage converter or plus and minus calculation device (10); The output termination amplifier (11) of current-voltage converter or plus and minus calculation device (10), the output termination rectifier (12) of amplifier (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520055301 CN2779420Y (en) | 2005-03-08 | 2005-03-08 | Measurement apparatus for magnetic susceptibility of trace quantity weak magnetic substance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520055301 CN2779420Y (en) | 2005-03-08 | 2005-03-08 | Measurement apparatus for magnetic susceptibility of trace quantity weak magnetic substance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2779420Y true CN2779420Y (en) | 2006-05-10 |
Family
ID=36753509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520055301 Expired - Fee Related CN2779420Y (en) | 2005-03-08 | 2005-03-08 | Measurement apparatus for magnetic susceptibility of trace quantity weak magnetic substance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2779420Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049225A (en) * | 2014-06-24 | 2014-09-17 | 无锡市崇安区科技创业服务中心 | Automatic magnetic powder magnetization degree measuring device |
| CN104375100A (en) * | 2013-08-12 | 2015-02-25 | 帅立国 | Differential type initial permeability material detection probe |
| CN104535946A (en) * | 2015-01-05 | 2015-04-22 | 河北联合大学 | Specific susceptibility tester |
| CN110057785A (en) * | 2018-01-19 | 2019-07-26 | 吴秉杰 | A kind of magneto-optic biological monitor with high sensitive |
-
2005
- 2005-03-08 CN CN 200520055301 patent/CN2779420Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104375100A (en) * | 2013-08-12 | 2015-02-25 | 帅立国 | Differential type initial permeability material detection probe |
| CN104049225A (en) * | 2014-06-24 | 2014-09-17 | 无锡市崇安区科技创业服务中心 | Automatic magnetic powder magnetization degree measuring device |
| CN104049225B (en) * | 2014-06-24 | 2017-01-11 | 无锡市崇安区科技创业服务中心 | Automatic magnetic powder magnetization degree measuring device |
| CN104535946A (en) * | 2015-01-05 | 2015-04-22 | 河北联合大学 | Specific susceptibility tester |
| CN104535946B (en) * | 2015-01-05 | 2017-08-18 | 华北理工大学 | A kind of specific susceptibility determinator |
| CN110057785A (en) * | 2018-01-19 | 2019-07-26 | 吴秉杰 | A kind of magneto-optic biological monitor with high sensitive |
| CN110057785B (en) * | 2018-01-19 | 2022-03-08 | 吴秉杰 | Magneto-optical biological detection device with high sensitivity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103645243B (en) | Electromagnetic nondestructive detection system for power transmission line | |
| CN201796013U (en) | Electric eddy current metal material analysis sensor | |
| CN101281168B (en) | Method for changing energize mode to realize different mode electromagnetic detection | |
| CN101839968B (en) | OVERHAUSER magnetometer | |
| CN105527339B (en) | Lossless detection method based on the U-shaped pulse electromagnetic sensor of combined type | |
| CN202126492U (en) | Digital fluxgraph | |
| CN2779420Y (en) | Measurement apparatus for magnetic susceptibility of trace quantity weak magnetic substance | |
| CN109407023A (en) | A kind of novel calibration method of magnetic moment (magnetic flux) tester | |
| CN105004633A (en) | Nanowire vertical array based fluid viscosity detection device and detection method | |
| CN109655771A (en) | Ac magnetic susceptibility measuring device and its measurement method | |
| CN102175131B (en) | Method for measuring steel plate thickness by leakage magnetic field | |
| CN1851391A (en) | Iron-thickness measuring instrument | |
| CN202648788U (en) | Eddy current low frequency vibration detection device | |
| CN201628694U (en) | Sensor for magnetic iron content in iron fine powder | |
| CN109030617A (en) | Barkhausen effect-based magnetic characteristic detection method and device for magnetic suspension track | |
| Ding et al. | An inductive salt solution concentration sensor using a planar coil based on a PQCR-L circuit | |
| CN104483530A (en) | Method and device for measuring non-uniformity of critical current density of surface layer of high-temperature superconducting bulk material | |
| CN104090249A (en) | Magnetic field measuring structure and measuring method | |
| CN112161560B (en) | Displacement sensing device and method based on permanent magnet flux measurement | |
| CN103308872B (en) | Combined magnetic field sensor and weak magnetic fields measurement device | |
| CN208206859U (en) | electrodeless conductivity analyzer | |
| CN203216901U (en) | Stress detecting device | |
| CN203535202U (en) | High sensitivity electromagnetic field sensor | |
| CN206258596U (en) | A kind of ground nuclear magnetic resonance sampling apparatus | |
| CN203443919U (en) | Weak magnetic inductor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |