CN112097965A - Pressure detector based on magnetostrictive material - Google Patents
Pressure detector based on magnetostrictive material Download PDFInfo
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- CN112097965A CN112097965A CN202011047782.6A CN202011047782A CN112097965A CN 112097965 A CN112097965 A CN 112097965A CN 202011047782 A CN202011047782 A CN 202011047782A CN 112097965 A CN112097965 A CN 112097965A
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- Prior art keywords
- magnetostrictive material
- material part
- giant magnetostrictive
- iron yoke
- giant
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- 239000000463 material Substances 0.000 title claims abstract description 122
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 94
- 229910052742 iron Inorganic materials 0.000 claims description 47
- 239000013013 elastic material Substances 0.000 claims description 41
- 239000000523 sample Substances 0.000 claims description 15
- 239000006249 magnetic particle Substances 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims description 3
- 239000012858 resilient material Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 14
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- QUSDAWOKRKHBIV-UHFFFAOYSA-N dysprosium iron terbium Chemical compound [Fe].[Tb].[Dy] QUSDAWOKRKHBIV-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/12—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress
- G01L1/125—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress by using magnetostrictive means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to the field of pressure detection, and particularly provides a magnetostrictive material-based pressure detector. The invention has the advantages of high pressure detection sensitivity, simple structure and wide measuring range.
Description
Technical Field
The invention relates to the field of pressure detection, in particular to a pressure detector based on magnetostrictive materials.
Background
Conventional pressure sensing is based on electrical principles. The pressure detection has narrow measuring range and low sensitivity, needs to arrange peripheral leads and is inconvenient to use in certain occasions in the fields of machine tools and automation.
Disclosure of Invention
To solve the above problems, the present invention provides a magnetostrictive material-based pressure probe, comprising: the magnet, a first iron yoke, a second iron yoke, a first giant magnetostrictive material part, an elastic material part, a second giant magnetostrictive material part and a third iron yoke, wherein two ends of the magnet are respectively connected with one end of the first iron yoke and one end of the second iron yoke, the other end of the first iron yoke is fixedly connected with one end surface of the first giant magnetostrictive material part, the first iron yoke is vertical to the normal direction of the end surface of the first giant magnetostrictive material part, one end of the third iron yoke is fixedly connected with one end surface of the second giant magnetostrictive material part, the third iron yoke is vertical to the normal direction of the end surface of the second giant magnetostrictive material part, the elastic material part is fixedly connected with the other end surface of the first giant magnetostrictive material part and the other end surface of the second giant magnetostrictive material part, and a gap is formed between the other end surface of the third iron yoke and the other end surface of the second iron yoke.
Further, the material of the elastic material portion is a non-magnetic material.
Further, the material of the elastic material portion is fiber or rubber.
Further, the magnet is an electromagnet or a permanent magnet.
Furthermore, the first giant magnetostrictive material part and the second giant magnetostrictive material part are made of rare-earth giant magnetostrictive materials.
Still further, still include the magnetic particle, the magnetic particle is placed in the elastic material portion.
Further, the number of the magnetic particles is plural.
Further, the first giant magnetostrictive material portion is cylindrical, and the second giant magnetostrictive material portion is cylindrical.
Further, the axes of the first and second giant magnetostrictive material portions coincide.
Further, the elastic material portion has a sectional area smaller than that of the first and second giant magnetostrictive material portions.
The invention has the beneficial effects that: the invention provides a magnetostrictive material based pressure detector, wherein two ends of a magnet are respectively connected with one end of a first iron yoke and one end of a second iron yoke, the other end of the first iron yoke is fixedly connected with one end surface of a first giant magnetostrictive material part, the first iron yoke is vertical to the normal direction of the end surface of the first giant magnetostrictive material part, one end of a third iron yoke is fixedly connected with one end surface of a second giant magnetostrictive material part, the third iron yoke is vertical to the normal direction of the end surface of the second giant magnetostrictive material part, an elastic material part is fixedly connected with the other end surface of the first giant magnetostrictive material part and the other end surface of the second giant magnetostrictive material part, and a gap is formed between the other end surface of the third iron yoke and the other end surface of the second iron yoke. In the present invention, the magnet, the first iron yoke, the first giant magnetostrictive material portion, the elastic material portion, the second giant magnetostrictive material portion, the third iron yoke, the gap, and the second iron yoke constitute a magnetic circuit. When the pressure detection device is applied, pressure to be detected is applied between the first iron yoke and the third iron yoke, the magnetic resistance in the magnetic loop is changed, the magnetic field at the gap is changed, and the pressure to be detected is detected by measuring the change of the magnetic field at the gap. On one hand, the pressure to be measured extrudes the first giant magnetostrictive material part and the second giant magnetostrictive material part, the first giant magnetostrictive material part and the second giant magnetostrictive material part generate a reverse magnetostrictive effect, molecules in the first giant magnetostrictive material part and the second magnetostrictive material part are rearranged, the magnetic permeability in the first giant magnetostrictive material part and the second giant magnetostrictive material part is increased, and the magnetic resistance of the first giant magnetostrictive material part and the second giant magnetostrictive material part is reduced; on the other hand, the elastic material part is extruded by the pressure to be measured, the elastic material part contracts, the distance between the first giant magnetostrictive material part and the second giant magnetostrictive material part is reduced, and the magnetic resistance of the elastic material part is reduced. Both effects reduce the reluctance in the magnetic circuit, thereby increasing the magnetic field at the gap more and improving the sensitivity of pressure detection. The invention is based on the magnetic circuit, does not need to arrange peripheral leads, and has simple structure and low preparation cost. In addition, in the invention, the thickness of the elastic material part can be changed or the material of the elastic material part can be replaced to adjust the pressure detection range, so the invention has the advantage of wide pressure detection range.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a magnetostrictive material based pressure probe.
FIG. 2 is a schematic view of yet another magnetostrictive material-based pressure probe.
In the figure: 1. a magnet; 2. a first iron yoke; 3. a second iron yoke; 4. a first giant magnetostrictive material portion; 5. an elastic material portion; 6. a second giant magnetostrictive material portion; 7. a third iron yoke; 8. a gap; 9. magnetic particles.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Example 1
The invention provides a pressure detector based on magnetostrictive materials. As shown in fig. 1, the magnetostrictive material based pressure probe includes a magnet 1, a first yoke 2, a second yoke 3, a first giant magnetostrictive material portion 4, an elastic material portion 5, a second giant magnetostrictive material portion 6, and a third yoke 7. Both ends of the magnet 1 are connected to one end of the first iron yoke 2 and one end of the second iron yoke 3, respectively. The magnet 1 is an electromagnet or a permanent magnet. The other end of the first yoke 2 is fixedly connected with one end face of the first giant magnetostrictive material part 4, and the first yoke 2 is perpendicular to the normal direction of the end face of the first giant magnetostrictive material part 4, so that an external force to be measured is applied to the first giant magnetostrictive material part 4 through the first yoke 2. One end of the third iron yoke 7 is fixedly connected with one end face of the second giant magnetostrictive material part 6, and the third iron yoke 7 is perpendicular to the normal direction of the end face of the second giant magnetostrictive material part 6, so that an external force is applied to the second giant magnetostrictive material part 6 through the third iron yoke 7. The elastic material portion 5 fixedly connects the other end surface of the first giant magnetostrictive material portion 4 and the other end surface of the second giant magnetostrictive material portion 6, that is, the elastic material portion 5 is sandwiched by the first giant magnetostrictive material portion 4 and the second giant magnetostrictive material portion 6. The material of the elastic material portion 5 is a non-magnetic material. Under the action of the external force, the magnetic properties of the material itself in the elastic material portion 5 are substantially unchanged, but the thickness of the elastic material portion 5 is significantly changed. Preferably, the material of the elastic material portion 5 is fiber or rubber. A gap 8 is arranged between the other end face of the third iron yoke 7 and the other end face of the second iron yoke 3, so that the change of the external force to be measured on the magnetic field in the magnetic circuit can be measured conveniently. The first giant magnetostrictive material part 4 and the second giant magnetostrictive material part 6 are made of rare earth giant magnetostrictive materials. Preferably, the materials of the first and second magnetostrictive material parts 4 and 6 are terbium dysprosium iron magnetostrictive materials.
In the present invention, the magnet 1, the first yoke 2, the first giant magnetostrictive material portion 4, the elastic material portion 5, the second giant magnetostrictive material portion 6, the third yoke 7, the gap 8, and the second yoke structure 3 form a magnetic circuit. When the pressure detection device is applied, pressure to be detected is applied between the first iron yoke 2 and the third iron yoke 7, the magnetic resistance in the magnetic circuit is changed, the magnetic field at the gap 8 is changed, and the pressure to be detected is detected by measuring the change of the magnetic field at the gap 8. On one hand, in the invention, on one hand, the pressure to be measured extrudes the first giant magnetostrictive material part 4 and the second giant magnetostrictive material part 6, the first giant magnetostrictive material part 4 and the second giant magnetostrictive material part 6 generate the inverse magnetostrictive effect, molecules in the first giant magnetostrictive material part 4 and the second magnetostrictive material part 6 are rearranged, the magnetic permeability in the first giant magnetostrictive material part 4 and the second giant magnetostrictive material part 6 is increased, and the magnetic resistance of the first giant magnetostrictive material part 4 and the second giant magnetostrictive material part 6 is reduced; on the other hand, the pressure to be measured extrudes the elastic material part 5, the elastic material part 5 contracts, the distance between the first giant magnetostrictive material part 4 and the second giant magnetostrictive material part 6 is reduced, and the magnetic resistance of the elastic material part 5 is reduced. Both effects reduce the reluctance in the magnetic circuit and thus increase the magnetic field at the gap 8 even more, thus improving the sensitivity of the pressure detection. The invention is based on the magnetic circuit, does not need to arrange peripheral leads, and has simple structure and low preparation cost. In addition, in the present invention, the thickness of the elastic material portion 5 can be changed or the material of the elastic material portion 5 can be replaced to adjust the pressure detection range, so the present invention has an advantage of a wide pressure detection range.
Further, the first giant magnetostrictive material portion 4 is cylindrical, and the second giant magnetostrictive material portion 6 is cylindrical. The axes of the first and second giant magnetostrictive material portions 4 and 6 overlap. That is, the first and second giant magnetostrictive material portions 4 and 6 face each other. Therefore, the pressure measuring device can bear larger pressure to be measured and expand the range of the pressure to be measured.
Example 2
On the basis of embodiment 1, as shown in fig. 2, the magnetostrictive material based pressure probe further comprises magnetic particles 9, the magnetic particles 9 being disposed in the elastic material portion 5. The number of the magnetic particles 9 is plural. Specifically, the magnetic particles 9 are uniformly doped in the elastic material portion 5. Thus, under the action of the pressure to be detected, in addition to the change of the distance between the first giant magnetostrictive material part 4 and the second giant magnetostrictive material part 6, the distance between the magnetic particles 9 is also reduced, the coupling between the magnetic particles 9 is enhanced, the overall magnetic resistance of the elastic material part 5 is reduced more, the magnetic field at the gap 8 is increased more, and the sensitivity of pressure detection is improved.
Preferably, the magnetic particles 9 are ferroferric oxide particles.
Example 3
In example 2, the sectional area of the elastic material portion 5 is smaller than the sectional areas of the first and second giant magnetostrictive material portions 4 and 6. That is, the sectional area of the elastic material portion 5 is smaller than the sectional area of the first giant magnetostrictive material portion 4 and smaller than the sectional area of the second giant magnetostrictive material portion 6. Thus, under the action of the external force to be detected, the thickness of the elastic material part 5 is reduced, the elastic material part 5 expands towards the left and right directions in fig. 2, the magnetic particles 9 expand towards the left and right directions in fig. 2, and the sectional area of the elastic material part 5 is increased, so that the magnetic permeability of the whole elastic material part 5 is reduced more, the magnetic field at the gap 8 is increased more, and the sensitivity of pressure detection is improved.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A magnetostrictive material based pressure probe, comprising: a magnet, a first iron yoke, a second iron yoke, a first super magnetostrictive material part, an elastic material part, a second super magnetostrictive material part, a third iron yoke, both ends of the magnet are respectively connected with one end of the first iron yoke and one end of the second iron yoke, the other end of the first iron yoke is fixedly connected with one end surface of the first giant magnetostrictive material part, the first iron yoke is vertical to the normal direction of the end face of the first giant magnetostrictive material part, one end of the third iron yoke is fixedly connected with one end face of the second giant magnetostrictive material part, the third iron yoke is perpendicular to the normal direction of the end face of the second giant magnetostrictive material part, the elastic material part is fixedly connected with the other end face of the first giant magnetostrictive material part and the other end face of the second giant magnetostrictive material part, and a gap is formed between the other end face of the third iron yoke and the other end face of the second iron yoke.
2. A magnetostrictive material based pressure probe as claimed in claim 1, characterized in that: the elastic material part is made of a non-magnetic material.
3. A magnetostrictive material based pressure probe as claimed in claim 2, characterized in that: the elastic material part is made of fiber or rubber.
4. A magnetostrictive material based pressure probe as claimed in claim 3, characterized in that: the magnet is an electromagnet or a permanent magnet.
5. A magnetostrictive material based pressure probe according to claim 4, characterized in that: the first giant magnetostrictive material part and the second giant magnetostrictive material part are made of rare earth giant magnetostrictive materials.
6. A magnetostrictive material based pressure probe according to any of claims 1-5, characterized in that: also included are magnetic particles disposed within the resilient material portion.
7. A magnetostrictive material based pressure probe as claimed in claim 6, wherein: the number of the magnetic particles is multiple.
8. A magnetostrictive material based pressure probe as claimed in claim 7, wherein: the first giant magnetostrictive material part is cylindrical, and the second giant magnetostrictive material part is cylindrical.
9. A magnetostrictive material based pressure probe as claimed in claim 8, wherein: the axes of the first giant magnetostrictive material part and the second giant magnetostrictive material part are overlapped.
10. A magnetostrictive material based pressure probe as claimed in claim 9, wherein: the elastic material portion has a cross-sectional area smaller than cross-sectional areas of the first and second giant magnetostrictive material portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047782.6A CN112097965B (en) | 2020-09-29 | 2020-09-29 | Pressure detector based on magnetostrictive material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047782.6A CN112097965B (en) | 2020-09-29 | 2020-09-29 | Pressure detector based on magnetostrictive material |
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| CN112097965A true CN112097965A (en) | 2020-12-18 |
| CN112097965B CN112097965B (en) | 2022-05-06 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1258430A (en) * | 1968-01-23 | 1971-12-30 | ||
| CN1308379A (en) * | 2000-02-10 | 2001-08-15 | 东芝株式会社 | Supermangnetostrictive material and its preparation process and magnetostrictive actuator and sensor |
| JP2005268250A (en) * | 2004-03-16 | 2005-09-29 | Tdk Corp | Super-magnetostrictive unit |
| CN101748407A (en) * | 2010-01-20 | 2010-06-23 | 中国船舶重工集团公司第七二五研究所 | Preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material |
| CN102721490A (en) * | 2012-07-09 | 2012-10-10 | 河北工业大学 | Passive pressure sensor based on giant magnetostrictive material Terfenol-D |
| CN106449277A (en) * | 2016-10-28 | 2017-02-22 | 游民 | Self-closing magnetic circuit permanent magnetic mechanism for switch |
-
2020
- 2020-09-29 CN CN202011047782.6A patent/CN112097965B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1258430A (en) * | 1968-01-23 | 1971-12-30 | ||
| CN1308379A (en) * | 2000-02-10 | 2001-08-15 | 东芝株式会社 | Supermangnetostrictive material and its preparation process and magnetostrictive actuator and sensor |
| JP2005268250A (en) * | 2004-03-16 | 2005-09-29 | Tdk Corp | Super-magnetostrictive unit |
| CN101748407A (en) * | 2010-01-20 | 2010-06-23 | 中国船舶重工集团公司第七二五研究所 | Preparation method of surface composite coating of Tb-Dy-Fe magnetostrictive material |
| CN102721490A (en) * | 2012-07-09 | 2012-10-10 | 河北工业大学 | Passive pressure sensor based on giant magnetostrictive material Terfenol-D |
| CN106449277A (en) * | 2016-10-28 | 2017-02-22 | 游民 | Self-closing magnetic circuit permanent magnetic mechanism for switch |
Non-Patent Citations (1)
| Title |
|---|
| 张弛: "超磁致伸缩材料的应用", 《住宅与房地产》 * |
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| CN112097965B (en) | 2022-05-06 |
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Effective date of registration: 20220415 Address after: 529100 No. 09 (main workshop), No. 11, North an road, Huicheng, Xinhui District, Jiangmen City, Guangdong Province Applicant after: JIANGMEN RUNYU SENSOR TECHNOLOGY CO.,LTD. Address before: 710119 No.2, floor 4, unit 4, building 7, 620 Xi'an Chang'an Street, Chang'an District, Xi'an City, Shaanxi Province Applicant before: Liu Feiqiong |
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Address after: 529100 No. 09 (main workshop), No. 11, North an road, Huicheng, Xinhui District, Jiangmen City, Guangdong Province Patentee after: Guangdong Runyu Sensor Co.,Ltd. Country or region after: China Address before: 529100 No. 09 (main workshop), No. 11, North an road, Huicheng, Xinhui District, Jiangmen City, Guangdong Province Patentee before: JIANGMEN RUNYU SENSOR TECHNOLOGY CO.,LTD. Country or region before: China |
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