CN220062941U - Mining optical fiber static level sensor - Google Patents
Mining optical fiber static level sensor Download PDFInfo
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- CN220062941U CN220062941U CN202321681738.XU CN202321681738U CN220062941U CN 220062941 U CN220062941 U CN 220062941U CN 202321681738 U CN202321681738 U CN 202321681738U CN 220062941 U CN220062941 U CN 220062941U
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- optical fiber
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- level sensor
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- body base
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 69
- 230000003068 static effect Effects 0.000 title claims abstract description 28
- 238000005065 mining Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims description 34
- 239000000835 fiber Substances 0.000 claims description 28
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 19
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000002706 hydrostatic effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000002528 anti-freeze Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model relates to the technical field of leveling measurement, in particular to a mining optical fiber static level sensor, which comprises a shell and a main body base, wherein the main body base is fixed on the shell, an elastic sensing element, a strain optical fiber and a first cantilever beam are arranged on the outer end face of the bottom surface of the main body base, the elastic sensing element is fixed on the outer end face of the bottom surface of the main body base and is communicated with a cavity formed by the inner end face of the bottom surface of the main body base and the shell, the strain optical fiber is fixed on the first cantilever beam, one end of the first cantilever beam is fixed on the main body base, and the other end of the first cantilever beam is in contact with the end face of the elastic sensing element. The deformation of the elastic sensing element is utilized to drive the first cantilever beam to bend and deform so as to influence the optical fiber sensing signal, thereby more sensitively monitoring the subsidence condition of the ground where the monitoring point is located; in addition, the main body base is also provided with a temperature optical fiber for carrying out Wen Buxiu positive on the strain value obtained by the strain optical fiber so as to obtain accurate strain data.
Description
Technical Field
The utility model relates to the technical field of leveling, in particular to a mining optical fiber static level sensor.
Background
In order to accurately obtain the slope displacement settlement condition of the open pit coal mine in real time, a static level sensor is often adopted for monitoring. The traditional static level sensor has capacitance type, differential pressure type, magnetostriction type and the like, and the problems of power supply, signal transmission distance and environmental factor interference are required to be considered in the use field. CN101408463B discloses a fiber grating static force level gauge with high liquid level measurement precision, which uses fiber grating to measure the liquid level height in the pontoon, so as to improve the precision of liquid level measurement, but has the problems of complex structural design and great production and processing difficulty. How to sensitively detect the settlement condition, obtain reliable monitoring result, can carry out long transmission distance simultaneously and structural design is simple, the practicality is strong, is the direction that the hydrostatic level sensor needs further improvement.
Disclosure of Invention
The utility model provides the mining optical fiber static level sensor with simple structure and higher sensitivity.
The technical scheme of the utility model is as follows:
the utility model provides a mining optical fiber static level sensor, includes casing and main part base, main part base swing joint is on the casing, be provided with elasticity sensing element, strain fiber and first cantilever beam on the outer terminal surface of main part base bottom surface, elasticity sensing element is fixed on the outer terminal surface of main part base bottom surface to enclose the cavity intercommunication that synthesizes with main part base bottom surface interior terminal surface and casing, the strain fiber is fixed on first cantilever beam, and first cantilever beam one end is fixed on the main part base, and the other end contacts with elasticity sensing element terminal surface.
The elastic sensing element is a corrugated pipe.
The cantilever beam is driven to bend and deform through the deformation of the corrugated pipe, the change of the liquid height in the sensor shell is detected through the strain optical fiber deformation on the cantilever beam, the vertical displacement change of the measuring point is obtained through the change of the liquid level height of the sensor, and the measuring point is compared with the reference point displacement to obtain the settlement of the measuring position.
The temperature optical fiber and the second cantilever beam are further arranged on the outer end face of the bottom face of the main body base, the temperature optical fiber is fixed on the second cantilever beam, and one end of the second cantilever beam is fixed on the main body base.
By setting the temperature optical fiber, wen Buxiu positive is carried out on the strain result, and the influence of inaccurate strain data generated by temperature change is eliminated, so that an accurate strain value is obtained.
The side wall of the shell is provided with a liquid level indicating pipe and an inlet and outlet for liquid to flow in or out, the top plate of the shell is provided with a ventilation port, and the liquid level indicating pipe is a transparent rubber hose.
The liquid level indicating pipe is communicated with a cavity formed by the inner end surface of the main body base and the shell.
The elastic sensing element is communicated with a cavity formed by the inner end surface of the bottom surface of the main body base and the shell through the through hole.
The shell is filled with liquid.
And a strain optical fiber outlet and a temperature optical fiber outlet are arranged on the side wall of the main body base.
The strain optical fiber is converged into the strain optical fiber cable through the strain optical fiber outlet, and the temperature optical fiber is converged into the temperature optical fiber cable through the temperature optical fiber outlet.
The utility model has the beneficial effects that: according to the mining optical fiber static level sensor, the deformation of the elastic sensing element is utilized to drive the first cantilever beam to bend and deform, so that an optical fiber sensing signal is changed, the change of the height of liquid in the shell is detected, and the displacement sedimentation change quantity of the surface of a mining area can be obtained; in addition, the set temperature optical fiber directly obtains a strain value of Wen Buxiu positive to the strain optical fiber, so that more accurate strain data can be obtained; meanwhile, long-distance transmission can be realized by optical fiber sensing, and the anti-interference capability is strong.
Drawings
Figure 1 is a schematic structural view of a mining fiber optic static level sensor of the present utility model,
figure 2 is a schematic view of the structure of the elastic sensing element,
figure 3 is a schematic structural view of the main body base,
figure 4 is a schematic structural view of the housing,
figure 5 is a schematic diagram of the structure of a mining fiber optic static level sensor of the present utility model,
the reference numerals are as follows:
1. the device comprises a shell, 2, a main body base, 3, an elastic sensing element, 4, a first cantilever beam, 5, a second cantilever beam, 6, a liquid level indicating pipe, 7, a strain optical fiber outlet, 8, a temperature optical fiber outlet, 9, a strain optical fiber cable, 10, a temperature optical fiber cable, 11, an inlet and an outlet, 12 and a ventilation port.
Detailed Description
Examples
As shown in fig. 1-5, the present embodiment provides a mining optical fiber static level sensor, which includes a housing 1 and a main body base 2, wherein the main body base 2 is movably connected to the housing 1, for example, may be sleeved or screwed. As shown in fig. 1, an elastic sensing element 3, a strain optical fiber and a first cantilever beam 4 are arranged on the outer end surface of the bottom surface of the main body base 2. As shown in fig. 3, a through hole is provided in the bottom surface of the main body base 2. The elastic sensing element 3 is fixed on the outer end face of the bottom face of the main body base 2 and is communicated with a cavity formed by the inner end face of the bottom face of the main body base 2 and the shell 1 through a through hole, the strain optical fiber is fixed on the first cantilever beam 4, one end of the first cantilever beam 4 is fixed on the main body base 2, and the other end of the first cantilever beam 4 is in contact with the end face of the elastic sensing element 3.
The strain fiber sensing is realized through a strain fiber grating, and the strain fiber grating can monitor deformation information in real time and transmit the deformation information to a remote host.
Further, the housing 1 is filled with a liquid.
The liquid is antifreeze fluid, which replaces water as medium, so as to avoid the problem of system failure caused by freezing expansion of water when the temperature is lower than 0 ℃. In addition, the antifreezing solution can also play a role in disinfection and sterilization, and can avoid the growth of microorganisms in water. The colored antifreeze liquid is selected, and whether bubbles exist in the pipeline can be visually seen.
Further, as shown in fig. 4, the side wall of the casing 1 is further provided with at least 2 inlets and outlets for liquid to flow in or out, and the inlets and outlets 11 are provided with quick connectors for connecting hoses for liquid to flow in or out.
Furthermore, in the use process, each fiber hydrostatic level sensor is fixed at a certain position on the surface of a mining area to form a settlement monitoring point, and all the fiber hydrostatic level sensors are connected through hoses to form a communicating vessel. The optical fiber static level sensor of each measuring point is connected through a hose, when the displacement of a certain sensor changes, the liquid in the sensor reaches the final level through the hose, and in order to prevent the vacuum from forming in the sensor shell 1 in the liquid flowing process, as shown in fig. 5, the top of the sensor is provided with an air hole 12, so that the liquid is ensured to flow smoothly.
The working principle of the technical scheme is as follows: by utilizing the principle of the communicating vessel, all communicated liquid levels are in the same horizontal plane no matter what condition is, thereby realizing the purpose of settlement monitoring between two points. When the ground of a certain monitoring point in a mining area is subsided, the optical fiber hydrostatic level sensor fixed at the measuring point moves in the vertical direction, the liquid height in the optical fiber hydrostatic level sensor shell 1 also changes, and the subsidence variable quantity of the measuring point can be obtained by detecting the change of the liquid height in the optical fiber hydrostatic level sensor shell 1. The change of the liquid level in the optical fiber static level sensor shell 1 can generate pressure change, the pressure change is transmitted to the elastic sensitive element 3, the elastic sensitive element 3 can deform along with the pressure change, the first cantilever beam 4 is driven to deform, the strain optical fiber tensioned on the first cantilever beam 4 is further changed, and the change of the liquid level in the optical fiber static level sensor shell 1 is detected through the change. The optical fiber sensing detection working principle is as follows: the change of strain causes the period and refractive index of the optical fiber to change, so that the reflection spectrum and the transmission spectrum of the optical fiber are changed, and corresponding strain information can be obtained by detecting the change through a remote host, which is a common technology in the prior art.
Further, as shown in fig. 2, the elastic sensing element 3 is a bellows.
In order to improve the response speed and bearing pressure of the elastic sensitive element 3, a bellows is selected to be installed and fixed on the outer end face of the bottom surface of the main body base 2. The corrugated pipe has the advantages of thinner pipe wall, light weight, high compressive strength, strong impact resistance, good flexibility and higher sensitivity, can convert pressure into elastic deformation, can extend or shorten along the length direction of the pipe under the action of internal pressure, and can generate displacement in certain relation with the pressure.
Further, a temperature optical fiber and a second cantilever beam 5 are further arranged on the outer end face of the bottom face of the main body base 2, the temperature optical fiber is fixed on the second cantilever beam 5, and one end of the second cantilever beam 5 is fixed on the main body base 2. The other end is suspended. The second cantilever beam 5 can deform along with temperature change, the deformation is transmitted to the temperature optical fiber, real-time temperature data of the mining optical fiber static level sensor are further obtained, the deformation result is Wen Buxiu positive, the environmental temperature compensation is realized, the influence of inaccurate strain data caused by temperature change is eliminated, and an accurate strain value is obtained.
The temperature optical fiber sensing is realized by the temperature optical fiber grating, and the data measured by the temperature optical fiber grating is compared with the data measured by the strain optical fiber grating to offset the influence of the temperature on the strain optical fiber grating.
Further, as shown in fig. 1, a liquid level indicator tube 6 is disposed on a side wall of the housing 1 and is communicated with a cavity enclosed by the inner end surface of the main body base 2 and the housing 1. The two ends of the liquid level indicating pipe 6 are respectively communicated with a cavity formed by the inner end surface of the main body base 2 and the shell 1 through two quick-connect connectors 2 minutes, so that liquid is communicated.
The liquid level indicating pipe 6 is a transparent rubber hose.
The transparent rubber hose is convenient for clearly observing the change of the liquid level in the hose, has good flexibility, strong pressure resistance, low cost and long service life, and is suitable for complex operation environments.
Further, as shown in fig. 1, the side wall of the main body base 2 is provided with a strain fiber outlet 7 and a temperature fiber outlet 8.
The optical fiber outlet is provided with an M10 waterproof joint for fixing the sensor and connecting the armored optical cable, so that the optical cable is prevented from twisting or breaking.
Further, the strain fiber is converged into the strain fiber optic cable 9 through the strain fiber outlet 7, and the temperature fiber is converged into the temperature fiber optic cable 10 through the temperature fiber outlet 8.
The mining area ground subsidence condition is monitored in real time by adopting the optical fiber static level sensor, weak deformation signals can be monitored, and the mining area ground subsidence monitoring device has the advantages of high measurement accuracy, strong anti-interference capability and simple structural design, and greatly improves the practicability and the effectiveness.
Claims (10)
1. The utility model provides a mining optical fiber static level sensor, its characterized in that includes casing (1) and main part base (2), main part base (2) swing joint is on casing (1), be provided with elasticity sensing element (3), strain fiber and first cantilever beam (4) on the outer terminal surface of main part base (2) bottom surface, elasticity sensing element (3) are fixed on the outer terminal surface of main part base (2) bottom surface to with main part base (2) bottom surface interior terminal surface and casing (1) enclose synthetic cavity intercommunication, the strain fiber is fixed on first cantilever beam (4), and first cantilever beam (4) one end is fixed on main part base (2), and the other end is with elasticity sensing element (3) terminal surface contact.
2. A mining optical fibre static level sensor according to claim 1, characterized in that the elastic sensing element (3) is a bellows.
3. The mining optical fiber static level sensor according to claim 1, wherein a temperature optical fiber and a second cantilever beam (5) are further arranged on the outer end face of the bottom face of the main body base (2), the temperature optical fiber is fixed on the second cantilever beam (5), and one end of the second cantilever beam (5) is fixed on the main body base (2).
4. The mining optical fiber static level sensor according to claim 1, wherein a liquid level indicating pipe (6) and an inlet and outlet (11) for liquid to flow in or out are arranged on the side wall of the shell (1), and a ventilation port (12) is arranged on the top plate of the shell (1).
5. The mining optical fiber static level sensor according to claim 4, wherein the liquid level indicating pipe (6) is communicated with a cavity enclosed by the inner end surface of the main body base (2) and the shell (1).
6. The mining optical fiber static level sensor according to claim 1, wherein the bottom surface of the main body base (2) is provided with a through hole, and the elastic sensitive element (3) is communicated with a cavity formed by the inner end surface of the bottom surface of the main body base (2) and the shell (1) in a surrounding manner through the through hole.
7. A mining fibre optic static level sensor according to claim 1, characterized in that the housing (1) is filled with a liquid.
8. The mining optical fiber static level sensor according to claim 1, wherein a strain optical fiber outlet (7) and a temperature optical fiber outlet (8) are formed in the side wall of the main body base (2).
9. A mining optical fibre static level sensor according to claim 8, characterized in that the strain fibre is led into the strain fibre cable (9) through the strain fibre outlet (7) and the temperature fibre is led into the temperature fibre cable (10) through the temperature fibre outlet (8).
10. A mining optical fibre static level sensor according to claim 4, characterized in that the level indicating tube (6) is a transparent rubber hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321681738.XU CN220062941U (en) | 2023-06-29 | 2023-06-29 | Mining optical fiber static level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321681738.XU CN220062941U (en) | 2023-06-29 | 2023-06-29 | Mining optical fiber static level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220062941U true CN220062941U (en) | 2023-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321681738.XU Active CN220062941U (en) | 2023-06-29 | 2023-06-29 | Mining optical fiber static level sensor |
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| Country | Link |
|---|---|
| CN (1) | CN220062941U (en) |
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2023
- 2023-06-29 CN CN202321681738.XU patent/CN220062941U/en active Active
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