CN112362896A - Flow velocity detection device based on magnetic material coupling - Google Patents
Flow velocity detection device based on magnetic material coupling Download PDFInfo
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- CN112362896A CN112362896A CN202011207160.5A CN202011207160A CN112362896A CN 112362896 A CN112362896 A CN 112362896A CN 202011207160 A CN202011207160 A CN 202011207160A CN 112362896 A CN112362896 A CN 112362896A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
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Abstract
The invention provides a flow velocity detection device based on magnetic material coupling, which comprises a cavity, a first magnetic material part and a second magnetic material part, wherein the cavity is encircled to form a pipeline, a first through hole and a second through hole are respectively formed in opposite surfaces of the cavity, the first magnetic material part and the second magnetic material part are in strip shapes, the first magnetic material part penetrates through the first through hole, the second magnetic material part penetrates through the second through hole, the first magnetic material part and the second magnetic material part are opposite in the pipeline, and a gap is formed between the end surface of the first magnetic material part and the end surface of the second magnetic material part. The invention has the advantage of high flow velocity detection precision. In addition, the invention is based on the magnetic circuit, and is convenient to be applied in complex environment.
Description
Technical Field
The invention relates to the field of flow velocity detection, in particular to a flow velocity detection device based on magnetic coupling.
Background
The flow rate refers to the displacement of the liquid per unit time. The existing flow velocity detection device is provided with a pitot tube, a propeller type flow velocity meter and the like. The conventional flow velocity detection device has low detection accuracy.
Disclosure of Invention
In order to solve the above problems, the present invention provides a flow velocity detection apparatus based on magnetic material coupling, including a cavity, a first magnetic material portion, and a second magnetic material portion, the cavity encloses a pipeline, opposite surfaces of the cavity are respectively provided with a first through hole and a second through hole, the first magnetic material portion and the second magnetic material portion are in a strip shape, the first magnetic material portion penetrates through the first through hole, the second magnetic material portion penetrates through the second through hole, the first magnetic material portion and the second magnetic material portion are opposite in the pipeline, and a gap is provided between an end surface of the first magnetic material portion and an end surface of the second magnetic material portion.
Still further, the width of the gap is less than 10 microns.
Furthermore, in the pipe, the first magnetic material part and the second magnetic material part are in a frustum shape, and the diameters of the end surfaces of the first magnetic material part and the second magnetic material part are smaller than those of other parts.
Furthermore, the end face of the first magnetic material part is provided with a groove, the end face of the second magnetic material part is provided with a protrusion, the material of the protrusion is the same as that of the second magnetic material part, the protrusion can penetrate into the groove, and the direction of the groove is along the direction of the pipeline.
Further, the end of the second magnetic material portion is frustum-shaped, and the protruding portion is disposed on the top surface of the frustum.
Further, the material of the first magnetic material portion and the second magnetic material portion is a soft magnetic material.
The invention has the beneficial effects that: the invention provides a flow velocity detection device based on magnetic material coupling, which comprises a cavity, a first magnetic material part and a second magnetic material part, wherein the cavity is encircled to form a pipeline, a first through hole and a second through hole are respectively formed in opposite surfaces of the cavity, the first magnetic material part and the second magnetic material part are in strip shapes, the first magnetic material part penetrates through the first through hole, the second magnetic material part penetrates through the second through hole, the first magnetic material part and the second magnetic material part are opposite in the pipeline, and a gap is formed between the end surface of the first magnetic material part and the end surface of the second magnetic material part. When the magnetic material sensor is applied, the first magnetic material part and the second magnetic material part are connected with an external magnetic circuit and used for measuring the magnetic resistance of a composite structure formed by the first magnetic material part and the second magnetic material part. When the flow velocity of the fluid is measured, the fluid flows in the pipeline, the fluid acts on the first magnetic material part and the second magnetic material part, so that the width of the gap, the shape and the internal stress of the first magnetic material part and the shape and the internal stress of the second magnetic material part are changed, the magnetic resistance of the composite structure of the first magnetic material part and the second magnetic material part is changed, and the flow velocity measurement is realized by measuring the magnetic resistance change of the composite structure. In the present invention, the width of the gap, the shape and internal stress of the first magnetic material portion, and the shape and internal stress of the second magnetic material portion are simultaneously changed by the fluid, so that the present invention has an advantage of high flow rate detection accuracy. In addition, the invention is based on the magnetic circuit, and is convenient to be applied in complex environment.
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 flow velocity detection device based on magnetic material coupling.
Fig. 2 is a schematic diagram of another flow velocity detection device based on magnetic material coupling.
Fig. 3 is a schematic diagram of another flow velocity detection device based on magnetic material coupling.
Fig. 4 is a schematic diagram of another flow velocity detection device based on magnetic material coupling.
In the figure: 1. a cavity; 2. a pipeline; 3. a first magnetic material portion; 4. a second magnetic material portion; 5. 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 flow velocity detection device based on magnetic material coupling. As shown in fig. 1, the flow rate detection device based on magnetic material coupling includes a chamber 1, a first magnetic material portion 3, and a second magnetic material portion 4. The material of the first magnetic material portion 3 and the second magnetic material portion 4 is a soft magnetic material for conducting the magnetic field lines. The cavity 1 encloses a pipeline 2, and a first through hole and a second through hole are respectively arranged on the opposite surfaces of the cavity 1. The shape of the chamber 1 is not limited herein. Preferably, the cross section of the cavity 1 is square, and the first through hole and the second through hole are respectively arranged on the opposite surfaces of the square cavity 1. The first through hole and the second through hole are oppositely arranged. The first magnetic material part and the second magnetic material part are strip-shaped, the first magnetic material part 3 penetrates through the first through hole, and the second magnetic material part 4 penetrates through the second through hole. In the pipe 2, the first magnetic material portion 3 and the second magnetic material portion 4 are opposed, and the first magnetic material portion 3 and the second magnetic material portion 4 are on the same straight line. A gap 5 is provided between the end face of the first magnetic material portion 3 and the end face of the second magnetic material portion 4. The width of the gap 5 is less than 10 microns to achieve a strong coupling between the first magnetic material portion 3 and the second magnetic material portion 4.
In application, the first magnetic material portion 3 and the second magnetic material portion 4 are connected with an external magnetic circuit to measure the magnetic resistance of the composite structure formed by the first magnetic material portion 3 and the second magnetic material portion 4. When the flow velocity of the fluid is measured, the fluid flows in the pipeline 2, the fluid acts on the first magnetic material part 3 and the second magnetic material part 4, so that the width of the gap 5, the shape and the internal stress of the first magnetic material part 3 and the shape and the internal stress of the second magnetic material part 4 are changed, the magnetic resistance of the composite structure of the first magnetic material part 3 and the second magnetic material part 4 is changed, and the flow velocity measurement is realized by measuring the magnetic resistance change of the composite structure. Since the width of the gap 5, the shape and internal stress of the first magnetic material portion 3, and the shape and internal stress of the second magnetic material portion 4 are simultaneously changed by the fluid in the present invention, the present invention has an advantage of high flow rate detection accuracy. In addition, the invention is based on the magnetic circuit, and is convenient to be applied in complex environment.
Example 2
In example 1, as shown in fig. 2, in the pipe 2, the first magnetic material portion 3 and the second magnetic material portion 4 are in a frustum shape, and the diameters of the end surfaces of the first magnetic material portion 3 and the second magnetic material portion 4 are smaller than those of the other portions. That is, the diameter of the first magnetic material portion 3 gradually decreases from the wall of the chamber 1 to the end face of the first magnetic material portion 3; the diameter of the second magnetic material portion 4 gradually decreases from the wall of the chamber 1 to the end face of the second magnetic material portion 4. As a result, the area of the first magnetic material portion 3 facing the end face of the second magnetic material portion 4 is reduced, the magnetic field lines are more concentrated in the gap 5, and the coupling between the diameters of the first magnetic material portion 3 and the second magnetic material portion 4 depends more heavily on the positional relationship therebetween.
Example 3
On the basis of embodiment 1, as shown in fig. 3, the end face of the first magnetic material portion 3 is provided with a groove, the end face of the second magnetic material portion 4 is provided with a matching protrusion, the material of the protrusion is the same as that of the second magnetic material portion 4, the protrusion can penetrate into the groove, and the direction of the groove is along the direction of the pipe 2. That is, not only the stress and the shape change are generated inside the first magnetic material portion 3 and the second magnetic material portion 4, but also the protrusion portion can move in the groove by the fluid. When the flow rate is low or no, the protrusion is in the groove, and the coupling between the first magnetic material part 3 and the second magnetic material part 4 is strong; when the flow rate is large, the protrusion moves out of the groove, so that the coupling between the first magnetic material portion 3 and the second magnetic material portion 4 is drastically reduced, thereby enabling the flow rate to be detected with higher accuracy.
Example 4
On the basis of example 3, as shown in fig. 4, the end portion of the second magnetic material portion 4 is in a frustum shape, and the protruding portion is placed on the top surface of the frustum. In this way, the second magnetic material portion 4 is thinner, which results in easier deflection of the second magnetic material portion 4, which results in easier movement of the protrusion out of the groove, which more dramatically changes the coupling between the first magnetic material portion 3 and the second magnetic material portion 4, which more drastically changes the magnetic resistance of the composite structure of the first magnetic material portion 3 and the second magnetic material portion 4, which results in higher accuracy of flow rate detection.
Further, the diameter of the first magnetic material portion 3 is larger than that of the second magnetic material portion 4. That is, the second magnetic material portion 4 is thinner than the first magnetic material portion 3. In this way, the second magnetic material portion 4 is more easily deflected by the fluid, so that the protrusion is more easily moved out of the groove, thereby more drastically changing the coupling between the first magnetic material portion 3 and the second magnetic material portion 4, and thus more drastically changing the magnetic resistance of the composite structure of the first magnetic material portion 3 and the second magnetic material portion 4, thereby achieving more accurate flow rate detection.
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 (6)
1. A flow velocity detection device based on magnetic material coupling, comprising: the pipeline comprises a cavity, a first magnetic material part and a second magnetic material part, wherein the cavity is surrounded into a pipeline, a first through hole and a second through hole are respectively formed in opposite surfaces of the cavity, the first magnetic material part and the second magnetic material part are strip-shaped, the first magnetic material part penetrates through the first through hole, the second magnetic material part penetrates through the second through hole, the first magnetic material part and the second magnetic material part are opposite in the pipeline, and a gap is formed between the end surface of the first magnetic material part and the end surface of the second magnetic material part.
2. The flow rate detection device based on magnetic material coupling of claim 1, wherein: the width of the gap is less than 10 microns.
3. The flow rate detection device based on magnetic material coupling according to claim 2, wherein: in the pipe, the first magnetic material portion and the second magnetic material portion are frustum-shaped, and the diameters of the end faces of the first magnetic material portion and the second magnetic material portion are smaller than those of other portions.
4. The flow rate detection device based on magnetic material coupling according to claim 2, wherein: the end face of the first magnetic material part is provided with a groove, the end face of the second magnetic material part is provided with a protruding part, the material of the protruding part is the same as that of the second magnetic material part, the protruding part can penetrate into the groove, and the direction of the groove is along the direction of the pipeline.
5. The flow rate detection device based on magnetic material coupling of claim 4, wherein: the end part of the second magnetic material part is in a frustum shape, and the protruding part is arranged on the top surface of the frustum.
6. The magnetic material coupling-based flow velocity detection apparatus according to any one of claims 1 to 5, wherein: the material of the first magnetic material part and the second magnetic material part is soft magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011207160.5A CN112362896A (en) | 2020-11-03 | 2020-11-03 | Flow velocity detection device based on magnetic material coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011207160.5A CN112362896A (en) | 2020-11-03 | 2020-11-03 | Flow velocity detection device based on magnetic material coupling |
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| Publication Number | Publication Date |
|---|---|
| CN112362896A true CN112362896A (en) | 2021-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011207160.5A Withdrawn CN112362896A (en) | 2020-11-03 | 2020-11-03 | Flow velocity detection device based on magnetic material coupling |
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| CN (1) | CN112362896A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115541926A (en) * | 2022-12-01 | 2022-12-30 | 中国科学院深海科学与工程研究所 | Self-powered current meter applied to ocean flow field flow velocity measurement |
-
2020
- 2020-11-03 CN CN202011207160.5A patent/CN112362896A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115541926A (en) * | 2022-12-01 | 2022-12-30 | 中国科学院深海科学与工程研究所 | Self-powered current meter applied to ocean flow field flow velocity measurement |
| CN115541926B (en) * | 2022-12-01 | 2023-03-24 | 中国科学院深海科学与工程研究所 | Self-powered current meter applied to ocean flow field flow velocity measurement |
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Application publication date: 20210212 |
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