CN217006190U - Fiber grating water pressure sensor - Google Patents
Fiber grating water pressure sensor Download PDFInfo
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- CN217006190U CN217006190U CN202220552675.7U CN202220552675U CN217006190U CN 217006190 U CN217006190 U CN 217006190U CN 202220552675 U CN202220552675 U CN 202220552675U CN 217006190 U CN217006190 U CN 217006190U
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Abstract
The utility model relates to the technical field of water pressure sensors, and discloses a fiber grating water pressure sensor, which comprises a shell, the inner side of the shell is provided with a detection plate which is movably arranged on the inner side of the shell, and is in contact with the shell, the inner side of the detection plate is provided with a detection part which is arranged in the shell, a sealing part is arranged between the detection part and the shell, a detection cavity is arranged in the shell, the detection cavity is arranged in the shell, the inner side of the detection cavity is provided with an elastic sheet which is fixed in the shell, through the fiber grating water pressure sensor that this application provided, can detect water pressure, and for ordinary sensor structure, the sensor that this application provided possesses can be convenient for detect the pressure of aquatic, can guarantee at the inside seal stability's of water pressure advantage.
Description
Technical Field
The utility model relates to the technical field of water pressure sensors, in particular to a fiber grating water pressure sensor.
Background
The fiber grating sensor can realize direct measurement of physical quantities such as temperature, strain and the like. The wavelength of the fiber grating is sensitive to temperature and strain at the same time, namely the temperature and the strain simultaneously cause the coupling wavelength of the fiber grating to move, so that the temperature and the strain cannot be distinguished by measuring the coupling wavelength movement of the fiber grating. Therefore, the problem of cross sensitivity is solved, and the realization of the differential measurement of temperature and stress is the premise of the practical application of the sensor. The differential measurement of temperature and stress is achieved by determining the stress and temperature change by a certain technique. The basic principle of the technologies is that two or two sections of fiber gratings with different temperature and strain response sensitivity are utilized to form a double grating temperature and strain sensor, and the temperature and the strain are solved by utilizing 2 linear equations of two-dimensional system by determining the temperature and the strain response sensitivity coefficient of 2 fiber gratings. The differential measurement techniques can be broadly divided into two categories, i.e., multi-fiber grating measurements and single-fiber grating measurements.
In recent years, the research and application of fiber grating sensors have attracted much attention, and compared with the traditional sensing measurement technology, the fiber grating sensing technology has many obvious advantages. For example, the fiber grating has the characteristics of flexible structural form, high temperature resistance, corrosion resistance, strong anti-electromagnetic interference capability, small volume, light weight and the like, and is widely applied to measurement of various physical quantities such as pressure, deformation, displacement, flow, volume, flow rate and the like.
When being used for liquid inside to carry out liquid pressure detection, current sensor need be fixed in the inside of box with it to the assurance can carry out stable detection to liquid, but current sensor is comparatively unstable when liquid is inside to be used, when detecting inside, and optic fibre hookup location sealing part is unstable, leads to inside easy intake, leads to inside to use unstably.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a fiber grating water pressure sensor, and aims to solve the problems that in the prior art, when the sensor is used in liquid, the sensor is unstable, and when the sensor is used for detecting the inside, the sealing part of the optical fiber connecting position is unstable, so that water is easy to enter the inside, and the use of the inside is unstable.
The utility model is realized in such a way that the fiber bragg grating water pressure sensor comprises a shell, wherein the inner side of the shell is provided with a detection plate, the detection plate is movably arranged on the inner side of the shell and is in contact with the shell, the inner side of the detection plate is provided with a detection part, the detection part is arranged in the shell, a sealing part is arranged between the detection part and the shell, a detection cavity is arranged in the shell, the inner side of the detection cavity is provided with an elastic sheet, the elastic sheet is fixed in the shell, and the elastic sheet is in contact with the detection plate.
Through the fiber grating water pressure sensor that this application provided, can detect water pressure, and for ordinary sensor structure, the sensor that this application provided possesses the pressure that can be convenient for to the aquatic and detects, can guarantee at the inside seal stability's of water pressure advantage for solve among the prior art sensor comparatively unstable when liquid inside uses, examine time measuring to inside, optic fibre hookup location seal position is unstable, lead to inside to intake easily, lead to the unstable problem of inside use.
In a possible embodiment, the detection portion includes a strain fiber grating sensor element fixed inside the housing, and the detection portion further includes a signal fiber fixed to the strain fiber grating sensor element.
In a possible implementation manner, the signal optical fiber penetrates through the housing, the signal optical fiber is electrically connected with the strain fiber grating sensor element, and a protective sleeve is arranged on the outer side of the signal optical fiber and is sleeved on the outer surface of the signal optical fiber.
In a possible implementation manner, the sealing portion includes a sealing head, the sealing head is fixedly sleeved on the outer surface of the protection sleeve, the sealing head contacts with the housing, and the sealing portion further includes a clamping block, and the clamping block is fixedly sleeved on the outer surface of the protection sleeve.
In a possible implementation manner, the sealing head is connected with the fixture block, the sealing head and the fixture block are internally provided with an extrusion cavity, the sealing head is communicated with the fixture block, and the sealing head and the fixture block can deform after being extruded.
Can guarantee at the stable leakproofness of signal optic fibre at the in-process that uses through the extrusion cavity that sets up, and then can avoid the infiltration condition that leads to because of pressure is too big in the use, and then can protect the strain fiber grating sensor element of inside, further can guarantee even use under high pressure also can obtain good stability.
In a possible implementation manner, a sealing strip is arranged on one side of the detection plate, the sealing strip is fixed inside the shell and is in contact with the detection plate, a protection block is arranged inside the detection cavity, and the protection block is fixed inside the detection cavity.
In a possible embodiment, the protection sleeve penetrates through the protection block, a support tube is arranged inside the detection cavity, the support tube is fixed inside the shell, and the detection plate is movably arranged inside the support tube.
Through the protection piece that sets up, can guide the material of packing the inside packing of group's subassembly to guaranteed can be stable in the use extrude the chamber, thereby guarantee the stability of using under high pressure environment, reach the purpose that can stably detect, and can guarantee the stability when the pick-up plate pressurized, further assurance can obtain accurate detection effect.
In a possible embodiment, the detection chamber further has a filling component inside, the filling component is filled inside the detection chamber, and the detection plate can move relative to the shell.
Compared with the prior art, the fiber grating water pressure sensor provided by the utility model has the following advantages:
1. this application can guarantee at the stable leakproofness of signal optic fibre at the in-process that uses through the extrusion cavity that sets up, and then can avoid the infiltration condition that leads to because of pressure is too big in the use, and then can protect the strain fiber grating sensor component of inside, and further can guarantee even use under high pressure also can obtain good stability.
2. This application can guide the material of packing group subassembly inside packing through the protection piece that sets up to guaranteed can be stable in the use extrude the extrusion chamber, thereby guarantee the stability of using under high-pressure environment, reach the purpose that can stably detect, and can guarantee the stability when the pick-up plate pressurized, further assurance can obtain accurate detection effect.
Drawings
FIG. 1 is a front view provided by the present invention;
FIG. 2 is a cross-sectional view provided by the present invention;
FIG. 3 is an enlarged view at A provided by the present invention;
fig. 4 is a bottom view of the detection plate structure provided by the present invention.
The device comprises a shell 1, a detection plate 2, a 3-ampere rotating head, a 4-strain fiber bragg grating sensor element, a 5-signal optical fiber, a 6-protection sleeve, a 7-extrusion cavity, a 8-sealing head, a 9-clamping block, a 10-detection cavity, a 11-filling component, an elastic sheet 12, a 13-sealing strip, a 14-support tube and a 15-protection block.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Referring to fig. 1-4, in order to provide a preferred embodiment of the present invention, a fiber grating water pressure sensor includes a housing 1, a detection plate 2 is disposed inside the housing 1, the detection plate 2 is movably disposed inside the housing 1 and contacts with the housing 1, a detection portion is disposed inside the detection plate 2 and is mounted inside the housing 1, a sealing portion is disposed between the detection portion and the housing 1, a detection cavity 10 is disposed inside the housing 1, the detection cavity 10 is opened inside the housing 1, an elastic sheet 12 is disposed inside the detection cavity 10, the elastic sheet 12 is fixed inside the housing 1, and the elastic sheet 12 contacts with the detection plate 2.
Through the fiber grating water pressure sensor that this application provided, can detect water pressure, and for ordinary sensor structure, the sensor that this application provided possesses the pressure that can be convenient for to the aquatic and detects, can guarantee at the inside seal stability of water pressure for solve among the prior art sensor comparatively unstable when liquid is inside to be used, examine time measuring to inside, optic fibre hookup location seal position is unstable, lead to inside to intake easily, lead to the unstable problem of inside use.
In a possible embodiment, the detection portion comprises a strain fiber grating sensor element 4, the strain fiber grating sensor element 4 is fixed inside the housing 1, and the detection portion further comprises a signal fiber 5, and the signal fiber 5 is fixed to the strain fiber grating sensor element 4.
In this application, the fiber grating sensor component that meets an emergency 4 can be fixed in inside 1 casing to the back appears pressure deformation in inside, utilizes the fiber grating sensor component that meets an emergency 4 to detect, has guaranteed the stable detection effect in the use.
In a possible embodiment, the signal fiber 5 penetrates through the housing 1, the signal fiber 5 is electrically connected with the strain fiber grating sensor element 4, and the outer side of the signal fiber 5 is provided with a protective sleeve 6, and the protective sleeve 6 is sleeved on the outer surface of the signal fiber 5.
It can be understood that the protecting sleeve 6 is stably contacted with the shell 1, so that the signal optical fiber 5 inside is protected, the service life of the signal optical fiber 5 is prevented from being reduced due to the fact that the signal optical fiber 5 is directly exposed in water, and the stable transmission effect of the signal optical fiber 5 is further ensured.
In a possible implementation manner, the sealing portion includes a sealing head 8, the sealing head 8 is fixedly sleeved on the outer surface of the protecting sleeve 6, the sealing head 8 contacts with the housing 1, the sealing portion further includes a clamping block 9, and the clamping block 9 is fixedly sleeved on the outer surface of the protecting sleeve 6.
It can be understood that the clamping block 9 can be used for limiting the position of the protective sleeve 6, so that the situation that the signal optical fiber 5 moves relative to the shell 1 to cause unstable sealing is avoided, and the purpose of ensuring the stability of the signal optical fiber 5 is achieved.
In a possible embodiment, the sealing head 8 is connected with the clamping block 9, the extrusion cavity 7 is formed inside the sealing head 8 and the clamping block 9, the sealing head 8 is communicated with the clamping block 9, and the sealing head 8 and the clamping block 9 can deform after being extruded.
The casing 1 understands, when there is pressure in the inside of casing 1, can extrude extrusion chamber 7, because sealed head 8 can contact pressure at first, so the inside extrusion chamber 7 of fixture block 9 can expand to make the contact of fixture block 9 and casing 1 inseparabler, pressure is big more, and the contact extrusion force is big more, thereby reaches the purpose of guaranteeing sealing stability.
The extrusion cavity 7 body can guarantee the stable tightness of the signal optical fiber 5 in the using process, so that the water seepage condition caused by overlarge pressure in the using process can be avoided, the internal strain fiber grating sensor element 4 can be protected, and good stability can be further guaranteed even if the sensor is used under high pressure.
In one possible embodiment, one side of the detection plate 2 is provided with a sealing strip 13, the sealing strip 13 is fixed inside the shell 1, the sealing strip 13 is in contact with the detection plate 2, a protection block 15 is arranged inside the detection cavity 10, and the protection block 15 is fixed inside the detection cavity 10.
It can be understood that sealing strip 13 and casing 1 are in close contact with pick-up plate 2 to guarantee that the condition of infiltration can not appear when pick-up plate 2 removes, and then guarantee stable use.
In a possible embodiment, the protective sheath 6 extends through the protective block 15, the detection chamber 10 has a support tube 14 inside, the support tube 14 is fixed inside the housing 1, and the detection plate 2 is movably arranged inside the support tube 14.
Through the protection piece 15 that sets up, can guide the material of packing the inside packing of group's subassembly to guaranteed can be stable in the use extrude extrusion chamber 7, thereby guarantee the stability of using under high-pressure environment, reach the purpose that can stably detect, and can guarantee the stability when pick-up plate 2 is compressed, further assurance can obtain accurate detection effect.
In a possible embodiment, the detection chamber 10 further has a filling component 11 inside, the filling component 11 is filled inside the detection chamber 10, and the detection plate 2 can move relative to the casing 1.
The material of the filling member 11 is not limited in this application, and those skilled in the art can design the filling member according to the use requirement. Illustratively, the filling material is a pressure transmitting water, which is compressed by the sensing plate 2 after being pressed, so that the pressure is monitored by the strain fiber grating sensor element 4.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The fiber bragg grating water pressure sensor is characterized by comprising a shell, wherein the inner side of the shell is provided with a detection plate, the detection plate is movably arranged on the inner side of the shell and is in contact with the shell, the inner side of the detection plate is provided with a detection part, the detection part is arranged in the shell, a sealing part is arranged between the detection part and the shell, a detection cavity is arranged in the shell, the inner side of the detection cavity is provided with an elastic sheet, the elastic sheet is fixed in the shell, and the elastic sheet is in contact with the detection plate.
2. The fiber grating water pressure sensor of claim 1, wherein the sensing portion comprises a strain fiber grating sensor element secured to an interior of the housing, the sensing portion further comprising a signal fiber secured to the strain fiber grating sensor element.
3. The fiber bragg grating water pressure sensor as claimed in claim 2, wherein the signal optical fiber penetrates through the housing, the signal optical fiber is electrically connected with the strain fiber bragg grating sensor element, a protective sleeve is arranged on the outer side of the signal optical fiber, and the protective sleeve is sleeved on the outer surface of the signal optical fiber.
4. The FBG water pressure sensor as recited in claim 3, wherein the sealing portion includes a sealing head, the sealing head is fixedly sleeved on the outer surface of the protective sleeve, the sealing head is in contact with the housing, the sealing portion further includes a clamping block, and the clamping block is fixedly sleeved on the outer surface of the protective sleeve.
5. The fiber bragg grating water pressure sensor as claimed in claim 4, wherein the sealing head is connected with the fixture block, an extrusion cavity is formed inside the sealing head and the fixture block, the sealing head is communicated with the fixture block, and the sealing head and the fixture block can deform after being extruded.
6. The fiber bragg grating water pressure sensor as claimed in claim 3, wherein a sealing strip is arranged on one side of the detection plate, the sealing strip is fixed inside the shell and is in contact with the detection plate, and a protection block is arranged inside the detection cavity and is fixed inside the detection cavity.
7. The fiber bragg grating water pressure sensor as claimed in claim 6, wherein the protecting sleeve penetrates through the protecting block, a supporting tube is arranged inside the detection cavity, the supporting tube is fixed inside the shell, and the detection plate is movably arranged inside the supporting tube.
8. The fiber bragg grating water pressure sensor according to claim 1, wherein the detection cavity further has a filling component inside, the filling component is filled inside the detection cavity, and the detection plate can move relative to the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220552675.7U CN217006190U (en) | 2022-03-14 | 2022-03-14 | Fiber grating water pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220552675.7U CN217006190U (en) | 2022-03-14 | 2022-03-14 | Fiber grating water pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217006190U true CN217006190U (en) | 2022-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220552675.7U Active CN217006190U (en) | 2022-03-14 | 2022-03-14 | Fiber grating water pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217006190U (en) |
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2022
- 2022-03-14 CN CN202220552675.7U patent/CN217006190U/en active Active
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