CN112067173A - Spiral pressure detector - Google Patents
Spiral pressure detector Download PDFInfo
- Publication number
- CN112067173A CN112067173A CN202011047781.1A CN202011047781A CN112067173A CN 112067173 A CN112067173 A CN 112067173A CN 202011047781 A CN202011047781 A CN 202011047781A CN 112067173 A CN112067173 A CN 112067173A
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- China
- Prior art keywords
- spiral
- yoke
- iron yoke
- magnetic
- pressure
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- 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.)
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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
Abstract
The invention relates to the field of pressure detection, and particularly provides a spiral pressure detector. 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 circuit 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. The invention has the advantages of high pressure detection sensitivity and simple equipment.
Description
Technical Field
The invention relates to the field of pressure detection, in particular to a spiral pressure detector.
Background
Conventional pressure sensing is based on electrical principles. The sensitivity of pressure detection is low, peripheral leads need to be arranged, and the pressure detection device 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 spiral pressure probe comprising: the magnetic body, the first iron yoke, the second iron yoke, the spiral and the third iron yoke are arranged on the outer wall of the magnetic body, two ends of the magnetic body 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 of the spiral, the first iron yoke is perpendicular to the axis of the spiral, one end of the third iron yoke is fixedly connected with the other end of the spiral, the third iron yoke is perpendicular to the axis of the spiral, a gap is arranged between the other end face of the third iron yoke and the other end face of the second iron yoke, and the spiral is made of giant magnetostrictive materials.
Further, the magnet is an electromagnet or a permanent magnet.
Furthermore, the giant magnetostrictive material is a rare earth giant magnetostrictive material.
Further, the number of turns of the spiral is greater than 2.
Still further, magnetic particles are included, the magnetic particles being disposed on the spiral.
Further, the magnetic particle is plural.
Further, the magnetic particles are ferroferric oxide particles.
Further, adjacent magnetic particles do not touch.
Further, magnetic particles are located between adjacent turns of the spiral.
Further, the helix is a double helix.
The invention has the beneficial effects that: the invention provides a spiral 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 of a spiral, the first iron yoke is vertical to the axis of the spiral, one end of a third iron yoke is fixedly connected with the other end of the spiral, the third iron yoke is vertical to the axis of the spiral, a gap is arranged between the other end surface of the third iron yoke and the other end surface of the second iron yoke, and the spiral is made of a giant magnetostrictive material. In the present invention, the magnet, the first iron yoke, the spiral, 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 circuit 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 spiral, so that the thread pitch of the spiral is shortened, and the coupling between adjacent turns is enhanced; on the other hand, the pressure to be measured extrudes the spiral, so that the giant magnetostrictive material generates a reverse magnetostrictive effect, and the magnetic permeability of the giant magnetostrictive material is increased. Both of these aspects result in a reduction in the reluctance of the spiral as a whole and thus in a greater increase in the magnetic field at the gap. Therefore, the invention has the advantage of high pressure detection sensitivity. The invention is based on the magnetic circuit, does not need to arrange peripheral leads, and has simple structure and low cost.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a helical pressure probe.
In the figure: 1. a magnet; 2. a first iron yoke; 3. a second iron yoke; 4. spiraling; 5. a third iron yoke; 6. a gap.
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 spiral pressure detector. As shown in fig. 1, the spiral pressure detector includes a magnet 1, a first yoke 2, a second yoke 3, a spiral 4, and a third yoke 5. 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 iron yoke 2 is fixedly connected with one end of the spiral 4, and the first iron yoke 2 is perpendicular to the axis of the spiral 4, so that the pressure to be measured is applied to the spiral 4 through the first iron yoke 2. One end of the third iron yoke 5 is fixedly connected with the other end of the spiral 4, and the third iron yoke 5 is perpendicular to the axis of the spiral 4, so that the pressure to be measured is applied to the spiral 4 through the third iron yoke 5. A gap 6 is provided between the other end face of the third iron yoke 5 and the other end face of the second iron yoke 3 for measuring the magnetic field in the magnetic circuit. The material of the spiral 4 is a giant magnetostrictive material. The giant magnetostrictive material is a rare earth giant magnetostrictive material. Preferably, the giant magnetostrictive material is a terbium dysprosium iron giant magnetostrictive material.
In the present invention, the magnet 1, the first iron yoke 2, the spiral 4, the third iron yoke 5, the gap 6, and the second iron yoke 3 constitute 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 5, the magnetic resistance in the magnetic circuit is changed, the magnetic field at the gap 6 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 spiral 4, so that the pitch of the spiral 4 is shortened, and the coupling between adjacent turns is enhanced; on the other hand, the pressure to be measured extrudes the spiral 4, so that the giant magnetostrictive material generates a reverse magnetostrictive effect, and the magnetic permeability of the giant magnetostrictive material is increased. Both of these aspects result in a reduction of the reluctance of the spiral 4 as a whole and thus in a greater increase of the magnetic field at the gap 6. Therefore, the invention has the advantage of high pressure detection sensitivity. The invention is based on the magnetic circuit, does not need to arrange peripheral leads, and has simple structure and low cost.
Further, the number of turns of the spiral 4 is larger than 2. Preferably, the number of turns of the spiral 4 is greater than 4. Therefore, when the magnetic permeability of the giant magnetostrictive material is changed by pressure, the influence of the coupling between the adjacent turns on the magnetic resistance between the first iron yoke 2 and the third iron yoke 5 can be changed more, and the sensitivity of pressure detection is improved.
Example 2
On the basis of example 1, magnetic particles are also included, which are placed on the spiral 4. The magnetic particle is plural. The magnetic particles are ferroferric oxide particles. Thus, when the spiral 4 is compressed, the distance between the magnetic particles on adjacent turns decreases, which enhances the magnetic field coupling between adjacent magnetic particles, further reduces the overall reluctance of the spiral 4, and further enhances the magnetic field at the gap 6, thereby improving the sensitivity of pressure sensing.
Further, adjacent magnetic particles do not touch. In this way, the change in the overall reluctance of the helix 4 by the magnetic particles results primarily from magnetic field coupling between the magnetic particles. Since the magnetic field coupling between the magnetic particles is very sensitive to the distance between the magnetic particles, the magnetic field coupling between the magnetic particles is also very sensitive to the pressure to be detected, thereby improving the sensitivity of pressure detection.
Example 3
On the basis of example 2, magnetic particles are located between adjacent turns of the spiral 4. In this way, the magnetic field coupling between adjacent turns is enhanced more by the magnetic particles, so that the overall reluctance of the spiral 4 is more sensitive to the pressure to be measured, thereby improving the sensitivity of pressure detection.
Further, the spiral wire has a dimple therein, and the magnetic particles are partially disposed in the dimple. That is, a portion of a single magnetic particle is disposed within a pit and another portion of the same magnetic particle is disposed outside the pit. This increases, on the one hand, the structural stability and makes it easier for the magnetic particles to be fixed on the helix 4; on the other hand, the cross section area of the spiral pipeline is reduced by the pits, and under the action of the pressure to be measured, the relative change of the magnetic conductivity of the spiral pipeline is more, so that the magnetic conductivity of the whole spiral 4 is more changed, the magnetic field at the position of the gap 6 is more changed, and the sensitivity of pressure detection is improved.
Example 4
On the basis of example 3, the spiral 4 is a double spiral. On one hand, the double-spiral structure can bear more pressure, and the pressure detection range of the detector is widened; on the other hand, the double-spiral structure reduces the distance between the spiral 4 pipelines, so that the coupling between the adjacent spiral pipelines is enhanced, the coupling between the adjacent spiral pipelines is more sensitive to the pressure to be detected, 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 helical pressure probe, comprising: magnet, first yoke, second yoke, spiral, third yoke, the both ends of magnet are connected respectively the one end of first yoke with the one end of second yoke, the other end fixed connection of first yoke the one end of spiral, first yoke with the axis of spiral is perpendicular, the one end fixed connection of third yoke the other end of spiral, the third yoke with the axis of spiral is perpendicular, another terminal surface of third yoke with be equipped with the clearance between another terminal surface of second yoke, the material of spiral is giant magnetostrictive material.
2. The helical pressure probe as defined in claim 1 wherein: the magnet is an electromagnet or a permanent magnet.
3. The helical pressure probe as defined in claim 2 wherein: the giant magnetostrictive material is a rare earth giant magnetostrictive material.
4. The helical pressure probe as defined in claim 3 wherein: the number of turns of the spiral is greater than 2.
5. The helical pressure probe as defined in claim 4 wherein: further comprising magnetic particles disposed on the spiral.
6. The helical pressure probe as defined in claim 5 wherein: the magnetic particle is plural.
7. The helical pressure probe as defined in claim 6 wherein: the magnetic particles are ferroferric oxide particles.
8. The helical pressure probe as defined in claim 7 wherein: adjacent magnetic particles do not touch.
9. The helical pressure probe as defined in claim 8 wherein: the magnetic particles are located between adjacent turns of the spiral.
10. The helical pressure probe as defined in any one of claims 1-9 wherein: the helix is a double helix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047781.1A CN112067173A (en) | 2020-09-29 | 2020-09-29 | Spiral pressure detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047781.1A CN112067173A (en) | 2020-09-29 | 2020-09-29 | Spiral pressure detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112067173A true CN112067173A (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011047781.1A Withdrawn CN112067173A (en) | 2020-09-29 | 2020-09-29 | Spiral pressure detector |
Country Status (1)
| Country | Link |
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| CN (1) | CN112067173A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1258430A (en) * | 1968-01-23 | 1971-12-30 | ||
| JP2004077317A (en) * | 2002-08-20 | 2004-03-11 | Nec Tokin Corp | Load sensor and load measuring device |
| CN101153824A (en) * | 2007-09-07 | 2008-04-02 | 河北工业大学 | Magnetostrictive stress sensor |
| CN102721490A (en) * | 2012-07-09 | 2012-10-10 | 河北工业大学 | Passive pressure sensor based on giant magnetostrictive material Terfenol-D |
| CN205861255U (en) * | 2016-08-09 | 2017-01-04 | 哈尔滨理工大学 | Ferromagnetic material stress based on barkhausen detection device |
| CN107576425A (en) * | 2017-08-25 | 2018-01-12 | 北京科技大学 | A kind of device and method of non-contact measurement ferromagnetic material stress |
| CN110940440A (en) * | 2019-12-25 | 2020-03-31 | 河南工业大学 | Giant magnetostrictive pressure measuring device and pressure measuring method |
| CN111044198A (en) * | 2020-01-02 | 2020-04-21 | 大连理工大学 | Magneto-elastic cable force sensor of fiber grating |
| CN111312889A (en) * | 2020-02-24 | 2020-06-19 | 西安交通大学 | Magnetoelectric spring structure and preparation method thereof |
-
2020
- 2020-09-29 CN CN202011047781.1A patent/CN112067173A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1258430A (en) * | 1968-01-23 | 1971-12-30 | ||
| JP2004077317A (en) * | 2002-08-20 | 2004-03-11 | Nec Tokin Corp | Load sensor and load measuring device |
| CN101153824A (en) * | 2007-09-07 | 2008-04-02 | 河北工业大学 | Magnetostrictive stress sensor |
| CN102721490A (en) * | 2012-07-09 | 2012-10-10 | 河北工业大学 | Passive pressure sensor based on giant magnetostrictive material Terfenol-D |
| CN205861255U (en) * | 2016-08-09 | 2017-01-04 | 哈尔滨理工大学 | Ferromagnetic material stress based on barkhausen detection device |
| CN107576425A (en) * | 2017-08-25 | 2018-01-12 | 北京科技大学 | A kind of device and method of non-contact measurement ferromagnetic material stress |
| CN110940440A (en) * | 2019-12-25 | 2020-03-31 | 河南工业大学 | Giant magnetostrictive pressure measuring device and pressure measuring method |
| CN111044198A (en) * | 2020-01-02 | 2020-04-21 | 大连理工大学 | Magneto-elastic cable force sensor of fiber grating |
| CN111312889A (en) * | 2020-02-24 | 2020-06-19 | 西安交通大学 | Magnetoelectric spring structure and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 樊长在等: "基于磁致伸缩逆效应的超磁致伸缩力传感器", 《仪表技术与传感器》 * |
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Application publication date: 20201211 |
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| WW01 | Invention patent application withdrawn after publication |