CN2135152Y - Ferromagnetic Substance Detection Sensor - Google Patents
Ferromagnetic Substance Detection Sensor Download PDFInfo
- Publication number
- CN2135152Y CN2135152Y CN 92232016 CN92232016U CN2135152Y CN 2135152 Y CN2135152 Y CN 2135152Y CN 92232016 CN92232016 CN 92232016 CN 92232016 U CN92232016 U CN 92232016U CN 2135152 Y CN2135152 Y CN 2135152Y
- Authority
- CN
- China
- Prior art keywords
- coil
- circuit board
- inductive
- magnetic core
- sensor
- 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 - Lifetime
Links
- 230000005294 ferromagnetic effect Effects 0.000 title claims abstract 4
- 239000000126 substance Substances 0.000 title claims abstract 3
- 238000001514 detection method Methods 0.000 title abstract description 4
- 230000005291 magnetic effect Effects 0.000 claims abstract description 17
- 230000005284 excitation Effects 0.000 claims abstract description 4
- 230000001939 inductive effect Effects 0.000 claims description 24
- 238000005516 engineering process Methods 0.000 claims description 9
- 239000003302 ferromagnetic material Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 238000005530 etching Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 241000237858 Gastropoda Species 0.000 claims description 2
- 239000012212 insulator Substances 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 2
- 230000006698 induction Effects 0.000 abstract description 4
- 238000010329 laser etching Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
A ferromagnetic substance detection sensor comprises a cylindrical magnetic core (1), an excitation coil (2) and two induction coils (3, 4), wherein the two induction coils are respectively printed on a circuit board, are in a planar spiral shape starting from the center, can be made into high-density coils by a laser etching process, and can also be made into coils of a multilayer circuit board.
Description
The utility model relates to a kind of sensor that detects trace iron magnetisable material amount, this trace iron magnetisable material generally is a particulate, can be contained in certain liquid (for example bearing or other machines in addition part be worn, its particle is comprised in the lubricating oil, also can deposit or attached on certain solid substrate, as glass, plastics etc.), the utility model main (but not exclusive) is used to measure the instrument of the content of trace iron magnetisable material, as the sensor of its detection.
The at present known sensor that is used to detect the ferromagnetic material amount has multiple, the mistor formula sensor that utilizes the semiconductor magnetoresistance is arranged, inductance type transducer, Hall element formula magneto-dependent sensor, and transformer type magneto-dependent sensor.Wherein comparatively advanced with the particle quantitative instrument (Pavticle Quantifier) of Britain Si Mingxi university invention, its sensor adopts transformer shape sensor, and structure is shown in Figure 1:
Go up around last field coil (2) at a cylindricality magnetic core (1), line chart is by the sinusoidal signal excitation of a certain characteristic frequency of 1KHz～50KHz, in magnetic core, produce an alternating magnetic field, near the two ends up and down of magnetic core, the divergent magnetic field of same distribution promptly occurs, with two inductive coils (3,4) with the magnetic core arranged in co-axial alignment on the equidistant symmetric position in cylindricality magnetic core two ends, induce signal and equate, line of induction Fig. 3,4 is connect mutually, its output signal is offset, thereby is output as zero.When the sample that contains the trace iron magnetisable material (5) is positioned on the test plane (6), ferromagnetic material wherein causes the divergent magnetic field of magnetic core upper surface to deform, the magnetic field of central authorities has strengthened, induced signal becomes big in the inductive coil (3) like this, thereby the output imbalance that causes two coils produces one and ferromagnetic material content output signal related.
In this sensor, two inductive coils 3,4th, the part of most critical must guarantee that they are in full accord, averages out under non-detection status guaranteeing, is output as zero.Prior art employing coiling on skeleton forms, and the problem of this mode is to be difficult to guarantee that from technology each line chart is in full accord.Another problem is to change because of winding deformation causes output signal, thus the operate as normal of disturb sensor.
The utility model proposes the new of inductive coil for this reason, have be different from prior art at 2, it is characterized in that: 1, two inductive coils are to be printed on separately on the circuit board, 2, it is shaped as the snail line from the center, the lead-in wire of center one end is to pass substrate to draw the ring edge from the back side, be convenient to welding, then on the front edge of circuit board, the inductive coil size and shape of two circuit boards is all on all four for the other end.
The shape of the spiral line type inductive coil that the utility model is designed can be circular, can also be ellipse, rectangle, polygon, it is the spiral inductive coil circuit board that the printed circuit technology that adopts is made that used circuit substrate should be the better rigidity insulator is not yielding, its material should be nonferromagnetic material, the utility model, also can adopt laser-induced thermal etching technology to make highdensity coil.Can also adopt multilayer inductive coil board structure of circuit for improving its sensitivity the utility model.
Owing to adopt such scheme, in the technology manufacturing characteristics are arranged, can accomplish high consistance between the coil, and there is not the distortion of coil basically, the more important thing is, this inductive coil can have small ferromagnetic material to detect by sensed coil to end face what position of taking up an official post, sensitivity is very high, this is because coil adopts the result who distributes from the spiral yarn shaped gross area at center, and the only coiling on greater than the cylinder of radius r of original coil that forms, so only can be to detecting less than the magnetic field total deformation in the radius r, sensitivity is just much poor.
Below in conjunction with drawings and Examples the utility model is further specified:
Fig. 1 is transformer type Fundamentals of Sensors figure
Fig. 2 is inductive coil printed circuit board construction figure
Among the figure: 1, cylindricality magnetic core; 2, excitation line chart; 3,4, inductive coil; 5, sample; 6, test plane.
The principle of Fig. 1 is as above-mentioned
Fig. 2 is first embodiment of the utility model, inductive coil can adopt on substrate two-sided deposited copper corrosion to make, the front is a spiral coil, the lead-in wire of center one end is to pass substrate to guide to the edge from the back side, be convenient to welding, this form technology is simpler, as second embodiment of the utility model, inductive coil also can adopt laser-induced thermal etching technology to make highdensity coil, makes number of total coils reach very high numerical value.
The 3rd embodiment of effect the utility model, inductive coil also can adopt multi-layer helical coil tandem array to form, and this can adopt multilayer circuit board technology to make, and can increase total figure number like this, improves induction coefficient and sensitivity.
Claims (5)
1, a kind of ferromagnetic material detecting sensor is made up of cylindricality magnetic core (1) field coil (2) and two inductive coils (3,4), field coil is on the cylindricality magnetic core, AC signal excitation by the outside, two inductive coils and cylindricality magnetic core arranged in co-axial alignment is characterized in that on the equidistant symmetric position in cylindricality magnetic core two ends:
(1) two inductive coil is to be printed on separately on the printed circuit board (PCB),
Being shaped as of (2) two inductive coils is linear from the snail at center, the lead-in wire of center one end is to pass substrate to guide to the edge from center, the back side, be convenient to welding, then on the edge in circuit board front, the inductive coil size and shape of two circuit boards all is on all four to the other end.
2, according to the described ferromagnetic material detecting sensor of claim 1, it is characterized in that described spiral yarn shaped inductive coil be shaped as circle, can also be ellipse, rectangle, polygon.
3, according to the described ferromagnetic quality inspection of claim 1 sensor then, it is characterized in that said circuit substrate should be the better rigidity insulator, and should be nonferromugnetic material.
4,, it is characterized in that described inductive coil adopts printed circuit board technology to make spirality inductive coil circuit board, also can adopt laser-induced thermal etching technology to make highdensity coil according to the described ferromagnetic quality inspection of claim 1 sensor then.
5, according to the described sensor for detecting substance of claim 1, it is characterized in that described inductive coil circuit board, one deck is arranged, also can there be the connecting mutually of multilayer to constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92232016 CN2135152Y (en) | 1992-09-04 | 1992-09-04 | Ferromagnetic Substance Detection Sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92232016 CN2135152Y (en) | 1992-09-04 | 1992-09-04 | Ferromagnetic Substance Detection Sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2135152Y true CN2135152Y (en) | 1993-06-02 |
Family
ID=33774714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92232016 Expired - Lifetime CN2135152Y (en) | 1992-09-04 | 1992-09-04 | Ferromagnetic Substance Detection Sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2135152Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963570A (en) * | 2010-05-17 | 2011-02-02 | 深圳市亚泰光电技术有限公司 | Device for rapidly detecting ferromagnetic grain in lubricating oil, detection method and signal processing circuit |
| CN102721738A (en) * | 2012-06-12 | 2012-10-10 | 大连理工大学 | Miniature eddy current sensor with structure consisting of silicon substrate and multilayer coils |
| CN102788838A (en) * | 2011-04-21 | 2012-11-21 | 通用电气公司 | Device for generating magnetic field, method for preparing such device and gas sensor for measurement of paramagnetic gas component |
| CN103728343A (en) * | 2014-01-15 | 2014-04-16 | 南京工业大学 | Online detection method for iron scrap content in slewing bearing lubricating grease and online detection device for lubricating grease |
| CN108345037A (en) * | 2018-02-09 | 2018-07-31 | 李法利 | Detection device |
| CN109813761A (en) * | 2019-03-12 | 2019-05-28 | 大连海事大学 | A kind of inductance magnetic barrier formula oil liquid on-Line Monitor Device |
| CN110268254A (en) * | 2016-11-11 | 2019-09-20 | 斯克拉普斯肯纳有限公司 | Method and apparatus for old metal scanning |
-
1992
- 1992-09-04 CN CN 92232016 patent/CN2135152Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963570A (en) * | 2010-05-17 | 2011-02-02 | 深圳市亚泰光电技术有限公司 | Device for rapidly detecting ferromagnetic grain in lubricating oil, detection method and signal processing circuit |
| CN102788838A (en) * | 2011-04-21 | 2012-11-21 | 通用电气公司 | Device for generating magnetic field, method for preparing such device and gas sensor for measurement of paramagnetic gas component |
| CN102721738A (en) * | 2012-06-12 | 2012-10-10 | 大连理工大学 | Miniature eddy current sensor with structure consisting of silicon substrate and multilayer coils |
| CN102721738B (en) * | 2012-06-12 | 2015-06-10 | 大连理工大学 | Miniature eddy current sensor with structure consisting of silicon substrate and multilayer coils |
| CN103728343A (en) * | 2014-01-15 | 2014-04-16 | 南京工业大学 | Online detection method for iron scrap content in slewing bearing lubricating grease and online detection device for lubricating grease |
| CN103728343B (en) * | 2014-01-15 | 2016-04-20 | 南京工业大学 | Online detection method for iron scrap content in slewing bearing lubricating grease and online detection device for lubricating grease |
| CN110268254A (en) * | 2016-11-11 | 2019-09-20 | 斯克拉普斯肯纳有限公司 | Method and apparatus for old metal scanning |
| CN108345037A (en) * | 2018-02-09 | 2018-07-31 | 李法利 | Detection device |
| CN109813761A (en) * | 2019-03-12 | 2019-05-28 | 大连海事大学 | A kind of inductance magnetic barrier formula oil liquid on-Line Monitor Device |
| CN109813761B (en) * | 2019-03-12 | 2022-02-08 | 大连海事大学 | Inductance magnetic plug type oil liquid on-line monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |