CN213956626U - Fiber grating pressure sensor - Google Patents
Fiber grating pressure sensor Download PDFInfo
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- CN213956626U CN213956626U CN202023179993.3U CN202023179993U CN213956626U CN 213956626 U CN213956626 U CN 213956626U CN 202023179993 U CN202023179993 U CN 202023179993U CN 213956626 U CN213956626 U CN 213956626U
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- fiber
- pressure sensor
- connector
- fastening
- detection body
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- 239000000835 fiber Substances 0.000 title claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 44
- 239000013307 optical fiber Substances 0.000 claims abstract description 38
- 238000006243 chemical reaction Methods 0.000 claims abstract description 28
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 230000000392 somatic effect Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract 1
- 230000007704 transition Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission 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
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The utility model provides a fiber grating pressure sensor, includes the joint body, detects body and urceolus, detect body one end opening, the inside reaction chamber that is equipped with of opening, detect the body outer wall and be close to the second fastening platform that opening one end was equipped with the evagination, second fastening platform front end detection somatic part with connect body threaded connection, second fastening platform rear end detection somatic part and urceolus threaded connection, connect the internal hydraulic pressure passageway that is equipped with of body, hydraulic pressure passageway is connected with detection body reaction chamber, the urceolus is the cavity barrel, its inside wall with there is the clearance in detecting the body, be equipped with strain optical fiber and temperature optical fiber on the detection body back end lateral wall, strain optical fiber and temperature optical fiber converge into the optical cable from the play fine mouth at urceolus rear portion, the optical cable is connected with. The utility model discloses fiber grating pressure sensor can obtain the object pressure that awaits measuring with a long-range passive measurement mode, has saved a large amount of costs of labor.
Description
Technical Field
The utility model relates to a pressure measurement equipment technical field, concretely relates to fiber grating pressure sensor.
Background
With the continuous strengthening of the national coal mine safety management, a plurality of coal mines gradually eliminate wood supports and traditional metal struts, and the single hydraulic struts are widely applied. However, in the actual use process of the single hydraulic prop, the single hydraulic prop needs to be monitored in real time to prevent the hydraulic prop from pressure relief. Present hydraulic prop detection device is generally for the pressure measurement instrument of hand-carrying, including manometer, lock sleeve, liquid storage cylinder etc. need the workman to patrol and examine the real-time pressure situation of looking over each hydraulic prop, can't accomplish remote monitoring, and the human cost is higher.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a fiber grating pressure sensor can be connected joint body and hydraulic prop or other transition joint, and then comes the demodulation change condition of meeting an emergency optic fibre and temperature optic fibre through long-range fiber grating demodulation appearance and server, obtains the pressure change condition of hydraulic prop.
The technical scheme of the utility model as follows:
the utility model provides a fiber grating pressure sensor, includes the joint body, detects body and urceolus, detect body one end opening, the inside reaction chamber that is equipped with of opening, detect the second fastening platform that body outer wall is close to opening one end and is equipped with the evagination, second fastening platform front end detection somatic part spare with connect body threaded connection, second fastening platform rear end detection somatic part spare and urceolus threaded connection, connect the internal hydraulic pressure passageway that is equipped with of body, hydraulic pressure passageway is connected with detection body reaction chamber, and hydraulic oil in the equipment that awaits measuring gets into in the reaction chamber through hydraulic pressure passageway. The outer cylinder is a hollow cylinder, and a certain gap is formed between the inner side wall of the outer cylinder and the detection body and used for arranging fiber gratings. Specifically, the strain optical fiber and the temperature optical fiber are arranged on the outer side wall of the rear section of the detection body, the strain optical fiber and the temperature optical fiber are converged into the optical cable from a fiber outlet at the rear part of the outer cylinder, and the optical cable is connected with the fiber grating demodulator.
Furthermore, the joint body is sequentially provided with a front joint, a first fastening table and a rear joint from front to back, a hydraulic channel penetrates through the middle of the front joint, the middle of the first fastening table and the middle of the rear joint, the rear joint is in threaded connection with the front end of the detection body, a fastening tool can be clamped on the first fastening table, and then the first fastening table is rotated to firmly connect the joint body with the detection body.
Further, the inside connection chamber that is equipped with of back joint, it is equipped with the internal thread to connect the intracavity lateral wall, it is equipped with the gasket to connect the chamber bottom, the gasket diameter is greater than the reaction chamber diameter, gasket center trompil, trompil size are greater than the hydraulic passage diameter.
Furthermore, the outer wall of the front joint is provided with threads for connecting with a piece to be tested or a transition joint, and a sealing element is arranged between the front joint of the joint body and the first fastening platform.
In the fiber bragg grating pressure sensor, the detection body is provided with the joint connecting thread at the front end of the second fastening platform, the outer cylinder connecting thread at the rear end of the second fastening platform, and the sealing ring is arranged on one side of the joint connecting thread and the outer cylinder connecting thread, which is close to the second fastening platform.
Further, the diameter of the second fastening table is larger than the maximum diameter of the joint bodies and the outer barrel on two adjacent sides. The fastening tool can be conveniently contacted with the second fastening table without touching the joint body and the outer cylinder.
Preferably, the cross-sectional shape of the first and second fastening stations comprises a regular polygon shape to facilitate gripping force application by a fastening tool.
In the fiber grating pressure sensor, the detection body has a cylindrical structure as a whole, and the length of the reaction chamber inside the detection body is greater than 1/2 of the length of the detection body.
Furthermore, an annular strain optical fiber placing groove is formed in the outer wall of the detection body on the outer side of the reaction chamber, and strain optical fibers are placed in the strain optical fiber placing groove to detect the deformation condition of the outer wall of the reaction chamber after being pressed. The temperature optical fiber placing groove is arranged on the outer wall of the tail end of the detection body along the axial direction of the detection body, and the temperature optical fiber is placed in the temperature optical fiber placing groove.
Further, the temperature optical fiber placing groove is positioned in the region between the tail end of the reaction chamber and the tail end of the detection body, so that the influence of the deformation of the reaction chamber on the temperature optical fiber is reduced.
The utility model discloses for prior art gained beneficial effect lie in: the utility model discloses fiber grating pressure sensor, simple structure can be connected the joint body with hydraulic prop or other transition joint, and then comes demodulation strain optical fiber and the situation of change of temperature optic fibre through long-range fiber grating demodulation appearance and server, obtains hydraulic prop's the pressure variation condition. The passive fiber bragg grating is adopted to replace the conventional manual inspection mode, so that a large amount of labor resources are saved.
Drawings
The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
In the drawings:
fig. 1 is a schematic structural view of a fiber grating pressure sensor in embodiment 1;
FIG. 2 is a sectional view of the fiber grating pressure sensor of example 1;
fig. 3 is a schematic structural view of a joint body in example 1;
FIG. 4 is a schematic view showing the structure of a detection body in example 1;
FIG. 5 is a schematic structural view of an outer tub in embodiment 1;
the components represented by the reference numerals in the figures are:
1. the joint comprises a joint body, 11, a front joint, 12, a first fastening platform, 13, a rear joint, 14, a hydraulic channel, 15, a connecting cavity, 2, a detection body, 21, a second fastening platform, 22, a joint connecting thread, 23, an outer cylinder connecting thread, 24, a reaction chamber, 25, a strain optical fiber placing groove, 26, a temperature optical fiber placing groove, 3, an outer cylinder, 31, a fiber outlet, 4, a gasket, 5, a first sealing ring, 6, a second sealing ring, 7, a strain optical fiber, 8, a temperature optical fiber, 9 and an optical cable.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that these embodiments are provided so that this disclosure can be more completely understood and fully conveyed to those skilled in the art, and the present disclosure may be implemented in various forms without being limited to the embodiments set forth herein.
The directions mentioned in the present invention, front and back, left and right, etc., are only used to express the relative position relationship, and are not restricted by any specific direction reference in practical application.
Example 1
Referring to fig. 1-2, fig. 1-2 are schematic structural diagrams of a fiber grating pressure sensor in this embodiment 1, including a connector body 1, a detection body 2 and an outer cylinder 3, where one end of the detection body 2 is open, a reaction chamber 24 is provided inside the opening, a second fastening platform 21 protruding outward is provided at an end of an outer wall of the detection body 2 close to the opening, a connector connecting thread 22 is provided on an outer wall of the detection body at a front end of the second fastening platform 21, the connector connecting thread 22 is in threaded connection with the connector body 1, an outer wall of the detection body at a rear end of the second fastening platform 21 is provided with an outer cylinder connecting thread 23, the outer cylinder connecting thread 23 is in threaded connection with the outer cylinder 3, a hydraulic passage 14 is provided in the connector body 1, the hydraulic passage 14 is connected with the reaction chamber 24 of the detection body 2, and hydraulic oil in a device to be tested enters the reaction chamber 24 through the hydraulic passage 14. The outer cylinder 3 is a hollow cylinder, and a certain gap is formed between the inner side wall of the outer cylinder and the detection body 2 for arranging fiber gratings. Specifically, the outer side wall of the rear section of the detection body 2 is provided with a strain optical fiber 7 and a temperature optical fiber 8, the strain optical fiber 7 and the temperature optical fiber 8 are converged into an optical cable 9 from a fiber outlet 31 at the rear part of the outer cylinder 3, and the optical cable 9 is connected with a fiber grating demodulator.
Referring to fig. 3, the joint body 1 is provided with a front joint 11, a first fastening table 12 and a rear joint 13 in sequence from front to back, a hydraulic passage 14 penetrates through the middle of the front joint 11, the first fastening table 12 and the rear joint 13, the rear joint 13 is in threaded connection with the front end of the detecting body 2, a fastening tool can be clamped on the first fastening table 12, and then the first fastening table 12 is rotated to firmly connect the joint body 1 with the detecting body 2.
Further, back connects 13 inside to be equipped with and connects chamber 15, it is equipped with the internal thread to connect 15 inside walls in chamber, it is equipped with gasket 4 to connect 15 bottoms in chamber, gasket 4 diameter is greater than reaction chamber 24 diameters, gasket 4 center trompil, the trompil size is greater than hydraulic passage 14 diameter.
Further, the outer wall of the front joint 11 is provided with threads for connecting with a to-be-tested piece or a transition joint, and a sealing element is arranged between the front joint 11 of the joint body 1 and the first fastening table 12.
Referring to fig. 4, the detecting body 2 is provided with a joint connecting screw 22 at the front end of the second fastening base 21, an outer cylinder connecting screw 23 at the rear end, and a first seal ring 5 and a second seal ring 6 on the side of the joint connecting screw 22 and the outer cylinder connecting screw 23 close to the second fastening base 21.
Preferably, the diameter of the outer cylinder connecting thread 23 is larger than that of the joint connecting thread 22, so as to increase the gap between the inner wall of the outer cylinder 3 and the rear section of the detecting body 2, and facilitate the arrangement of the fiber grating.
Further, the diameter of the second fastening platform 21 is larger than the maximum diameter of the joint body 1 and the outer cylinder 3 on two adjacent sides. The fastening tool can be easily brought into contact with the second fastening table 21 without touching the coupling body 1 and the outer cylinder 3.
Preferably, the cross-sectional shapes of the first fastening stage 12 and the second fastening stage 21 include regular polygonal shapes, such as quadrangles or hexagons, to facilitate the clamping force of the fastening tool.
In this embodiment, the detecting body 2 has a cylindrical structure as a whole, and the length of the inner reaction chamber 24 is greater than 1/2 of the length of the detecting body 2, so as to accommodate more hydraulic oil, and to facilitate the transmission of the deformation of the reaction chamber to the strain optical fiber 7 on the outer wall of the detecting body.
Furthermore, an annular strain optical fiber placing groove 25 is arranged on the outer wall of the detection body 2 outside the reaction chamber 24, and the strain optical fiber 7 is placed in the strain optical fiber placing groove 25 so as to detect the deformation condition of the outer wall of the reaction chamber 24 after being pressed. The outer wall of the tail end of the detection body 2 is provided with a temperature optical fiber placing groove 26 which is arranged along the axial direction of the detection body 2, and a temperature optical fiber 8 is placed in the temperature optical fiber placing groove 26.
Further, the temperature optical fiber 8 placing groove is located in the region between the end of the reaction chamber 24 and the end of the detecting body 2 to reduce the influence of the deformation of the reaction chamber 24 on the temperature optical fiber 8.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The fiber bragg grating pressure sensor is characterized by comprising a connector body (1), a detection body (2) and an outer barrel (3), wherein one end of the detection body (2) is opened, a reaction chamber (24) is arranged in the opening, a second fastening platform (21) which protrudes outwards is arranged at one end, close to the opening, of the outer wall of the detection body (2), the front end of the second fastening platform (21) is provided with the detection body (2), the part of the detection body (2) at the front end of the second fastening platform is in threaded connection with the connector body (1), the part of the detection body (2) at the rear end of the second fastening platform (21) is in threaded connection with the outer barrel (3), a hydraulic channel (14) is arranged in the connector body (1), the hydraulic channel (14) is connected with the reaction chamber (24) of the detection body (2), the outer barrel (3) is a hollow barrel, a gap exists between the inner side wall of the outer barrel and the detection body (2), and a strain optical fiber (7) and a temperature optical fiber (8) are arranged on the outer side wall at the rear section of the detection body (2), the strain optical fiber (7) and the temperature optical fiber (8) are converged into an optical cable (9) from a fiber outlet (31) at the rear part of the outer cylinder (3), and the optical cable (9) is connected with a fiber grating demodulator.
2. The fiber bragg grating pressure sensor according to claim 1, wherein the connector body (1) is provided with a front connector (11), a first fastening table (12) and a rear connector (13) in sequence from front to back, a hydraulic channel (14) penetrates through the middle of the front connector (11), the first fastening table (12) and the rear connector (13), and the rear connector (13) is in threaded connection with the front end of the detection body (2).
3. The fiber grating pressure sensor according to claim 2, wherein the rear connector (13) is internally provided with a connecting cavity (15), the inner side wall of the connecting cavity (15) is provided with internal threads, the bottom of the connecting cavity (15) is provided with a gasket (4), the diameter of the gasket (4) is larger than that of the reaction chamber (24), the center of the gasket (4) is provided with an opening, and the opening size is larger than that of the hydraulic channel (14).
4. A fiber grating pressure sensor according to claim 2 or 3, characterized in that the outer wall of the front connector (11) is provided with a thread, and a sealing member is provided between the front connector (11) of the connector body (1) and the first fastening stage (12).
5. The fiber grating pressure sensor according to claim 1, wherein the detecting body (2) is provided with a joint connecting thread (22) at the front end of the second fastening stage (21), an outer cylinder connecting thread (23) at the rear end, and a sealing ring is provided on the joint connecting thread (22) and the outer cylinder connecting thread (23) on the side close to the second fastening stage (21).
6. A FBG pressure sensor as claimed in claim 5, characterised in that the diameter of the second fastening station (21) is larger than the largest diameter of the adjacent two side connector bodies (1) and the outer cylinder (3).
7. The fiber grating pressure sensor according to claim 1, wherein the detecting body (2) has a cylindrical structure as a whole, and the length of the inner reaction chamber (24) is greater than 1/2 of the length of the detecting body (2).
8. The fiber grating pressure sensor according to claim 7, wherein an annular strain fiber placement groove (25) is formed in the outer wall of the detecting body (2) outside the reaction chamber (24), and the strain fiber (7) is placed in the strain fiber placement groove (25).
9. The fiber grating pressure sensor according to claim 7, wherein a temperature fiber placement groove (26) arranged along the axial direction of the detecting body (2) is arranged on the outer wall of the tail end of the detecting body (2), and the temperature fiber (8) is placed in the temperature fiber placement groove (26).
10. A fibre grating pressure sensor according to claim 9, wherein the temperature fibre placement channel (26) is located in the region between the end of the reaction chamber (24) and the end of the detection body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023179993.3U CN213956626U (en) | 2020-12-25 | 2020-12-25 | Fiber grating pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023179993.3U CN213956626U (en) | 2020-12-25 | 2020-12-25 | Fiber grating pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213956626U true CN213956626U (en) | 2021-08-13 |
Family
ID=77194306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023179993.3U Active CN213956626U (en) | 2020-12-25 | 2020-12-25 | Fiber grating pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213956626U (en) |
-
2020
- 2020-12-25 CN CN202023179993.3U patent/CN213956626U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Building D12, CRRC Zhihui City, No. 3777 Chunxuan Road, High tech Zone, Jinan City, Shandong Province, 250000 Patentee after: Shandong Guang'an Intelligent Technology Co.,Ltd. Address before: Block B, physicochemical building, 3666 Century Avenue, high tech Zone, Jinan City, Shandong Province Patentee before: Shandong Guang'an Intelligent Technology Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Fiber Bragg Grating Pressure Sensor Effective date of registration: 20231219 Granted publication date: 20210813 Pledgee: Bank of Beijing Co.,Ltd. Jinan Branch Pledgor: Shandong Guang'an Intelligent Technology Co.,Ltd. Registration number: Y2023980072789 |