CN216717357U - Regional settlement measuring device based on fiber bragg grating strain sensor - Google Patents
Regional settlement measuring device based on fiber bragg grating strain sensor Download PDFInfo
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- CN216717357U CN216717357U CN202220295312.XU CN202220295312U CN216717357U CN 216717357 U CN216717357 U CN 216717357U CN 202220295312 U CN202220295312 U CN 202220295312U CN 216717357 U CN216717357 U CN 216717357U
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Abstract
The utility model provides a device for measuring regional settlement based on a fiber bragg grating strain type sensor, and belongs to the technical field of ground settlement and measurement. The utility model provides a device for measuring regional settlement based on a fiber bragg grating strain type sensor, which comprises a base and a shell covered above the base, wherein the shell is provided with an inner cavity for storing water, the upper end of the shell is provided with an air guide hole for communicating the inner cavity of the shell with the outside, the base is provided with a strain sensor, the strain sensor is connected with a strain optical fiber, the inner side of the shell is provided with a first temperature sensor, and the first temperature sensor is connected with the first temperature optical fiber and is also provided with a water filling port and a water outlet. The device for measuring regional settlement based on the fiber bragg grating strain sensor has the advantages of strong environmental adaptability, high durability, high measuring accuracy, simplicity and convenience in assembly, convenience in networking, capability of being used in series, simplicity and convenience in use and easiness in popularization.
Description
Technical Field
The utility model belongs to the technical field of ground settlement and measurement thereof, and particularly relates to a device for measuring regional settlement based on a fiber bragg grating strain type sensor.
Background
In recent years, fiber grating sensor technology has been the subject of much attention and research, and direct measurement of physical quantities such as temperature and strain can be achieved by fiber grating sensors.
Ground subsidence refers to a geological phenomenon that a certain ground area is horizontally reduced, mainly occurs in a high-density residential area or a working area in a city with concentrated population density and developed economy, is a common geological problem and has great danger, and ground subsidence is an extremely slow change process and can be monitored only after long-term evolution and development, even can not be monitored for a long time, so that serious geological disasters can occur, and life and property safety of people can be threatened even in a certain person-intensive area.
At present often use fiber grating sensing device to subside to measure ground, fiber grating has the characteristics of small corrosion-resistant anti-electromagnetic interference, can tolerate the bad environment of the sad among the stratum settlement monitoring process, but fiber grating is sensitive to meeting an emergency and temperature simultaneously, and cross sensitive problem appears easily in the sensing process, leads to in the measurement process surrounding environment to cause great influence to the measuring result: secondly, because ground subsides and measures and need carry out long-time continuous stability monitoring, in the monitoring period, along with the change of ambient temperature and weather, the inside atmospheric pressure of subsidence device and part also can change thereupon, to the settlement system who monitors through the liquid level, the interference that the change of the inside atmospheric pressure of device can very big degree is to hydraulic continuous observation, influence monitoring process's precision, and because ground surface layer environment complexity is higher, it can not be that the complete horizontal mode sinks to lead to most ground subsides, the probability can produce certain inclination, current subsides the device and is difficult to satisfy the precision demand to the small settlement monitoring in ground.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a fiber grating strain sensor-based regional settlement measuring device, and aims to solve the problem that the measuring precision of the fiber grating settlement measuring device is greatly influenced by other factors.
In order to realize the purpose, the utility model adopts the technical scheme that: the utility model provides a survey region and subside device based on fiber grating strain transducer, includes: the casing in the base top is established to base and cover, the casing is provided with the inner chamber that is used for retaining, the upper end of casing is equipped with the air guide hole, the air guide hole be used for with casing inner chamber and external intercommunication, install strain sensor on the base, strain sensor is connected with the optic fibre that meets an emergency, a temperature sensor is installed to the inboard of casing, a temperature sensor is connected with first temperature optic fibre still be provided with water filling port and outlet on the casing.
In a possible implementation manner, a strain mounting groove for mounting the strain sensor is formed in the top surface of the base, a bottom optical fiber guide pipe for penetrating the strain optical fiber is arranged on the base, and the bottom optical fiber guide pipe is communicated with the strain mounting groove.
In one possible implementation, the strain sensors are provided in three groups.
In a possible implementation, three groups of the strain sensors are distributed in a regular triangle.
In a possible implementation manner, a top optical fiber conduit penetrating the first temperature optical fiber is arranged on the shell.
In a possible implementation manner, a porous partition board is arranged in the inner cavity of the shell, and the inner cavity of the shell is divided into an upper cavity and a lower cavity by the porous partition board, wherein the upper cavity and the lower cavity are communicated with each other.
In a possible implementation manner, a second temperature mounting groove is formed in the lower end face of the porous partition plate, a second temperature sensor is mounted in the second temperature mounting groove, and a second temperature optical fiber is connected to the second temperature mounting groove.
In a possible implementation manner, a middle connection hole suitable for the second temperature optical fiber to pass through is arranged at the bottom of the second temperature installation groove.
In a possible implementation manner, a mesh-shaped pipe head is arranged at the upper end of the air guide hole, and the mesh-shaped pipe head is of an inverted U-shaped structure.
In a possible implementation manner, the water filling port and the water discharging port are symmetrically arranged at the lower end of the shell.
The device for measuring the regional settlement based on the fiber bragg grating strain sensor has the beneficial effects that:
compared with the prior art, the device comprises a base and a shell, wherein the shell is provided with an inner cavity for storing water, the base is provided with a strain sensor, the upper end surface of the shell is provided with an air guide hole and a first temperature sensor, the shell is provided with a water injection port and a water discharge port, when the device is used, the device is placed on a surface to be detected, a proper amount of water is injected into the shell, the strain sensor positioned on the base monitors the force condition borne by the strain sensor in real time, once the device is inclined or leaked, the real ground descending condition can be known through analyzing the value returned by the strain sensor, the next step of treatment is further carried out, the air guide hole is communicated with the external environment and the inside of the device, the air pressure inside the device is equal to the atmospheric pressure of the external environment, a natural air pressure balancing device is formed, the using error of the device is reduced, and the first temperature sensor can eliminate the influence of temperature change on the strain sensor, the change of the strain sensor is completely from the change of the stress of the strain sensor, the data error caused by human error or environmental difference is effectively avoided, the real condition of ground settlement can be monitored in real time, the health condition of the device can be monitored, the influence of the external environment on the measurement of the device is reduced, the application range of the device is further expanded, the device can be used in different geological environments, such as sand, forest lands and other areas with more environmental influences, and the strain sensor has the advantages of good waterproof performance, long service life, good magnetic interference resistance and the like, so that the device is suitable for long-term monitoring and can also be applied to the area influenced by a magnetic field.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a region sedimentation device according to an embodiment of the present invention;
fig. 2 is a schematic view of an internal structure of a region settling device according to an embodiment of the present invention;
fig. 3 is a schematic top view of a region settling device according to an embodiment of the present invention;
FIG. 4 is a sectional view taken along line A-A of FIG. 3;
fig. 5 is a schematic front view of a region settling device according to an embodiment of the present invention;
FIG. 6 is a sectional view taken along line B-B of FIG. 5;
fig. 7 is a sectional structural view taken along line C-C in fig. 5.
In the figure: 1. a base; 2. a housing; 3. a strain mounting groove; 4. an air vent; 5. a first temperature mounting groove; 6. a water injection port; 7. a water outlet; 8. a bottom fiber optic conduit; 9. a top fiber optic conduit; 10. a porous separator; 11. a second temperature mounting groove; 12. a middle connecting hole; 13. a mesh pipe head.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in 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.
Referring to fig. 1 to 7, a specific embodiment of a device for measuring regional settlement based on a fiber grating strain gauge sensor according to the present invention is described, including: base 1 and cover establish the casing 2 in base 1 top, casing 2 is provided with the inner chamber that is used for retaining, the upper end of casing 2 is equipped with air guide hole 4, air guide hole 4 is used for 2 inner chambers of casing and external intercommunication, base 1 installs strain sensor (strain sensor does not embody in the drawing), strain sensor is connected with strain optical fiber (strain optical fiber does not embody in the drawing), first temperature sensor (first temperature sensor does not embody in the drawing) is installed to casing 2's inboard, temperature sensor is connected with first temperature optic fiber (first temperature optic fiber does not embody in the drawing), still be provided with water filling port 6 and outlet 7 on the casing 2.
The utility model provides a device for measuring regional settlement based on a fiber bragg grating strain sensor, compared with the prior art, the device comprises a base 1 and a shell 2, the shell 2 is provided with an inner cavity for storing water, the base 1 is provided with the strain sensor, the upper end surface of the shell 2 is provided with an air guide hole 4 and a first temperature sensor, the shell 2 is provided with a water injection port 6 and a water discharge port 7, when the device is used, the device is placed on a surface to be measured, a proper amount of water is injected into the shell 2, the strain sensor positioned on the base 1 monitors the force condition borne by the strain sensor in real time, once the device is inclined or leaked, the real condition of the ground at the moment can be known through analyzing the value returned by the strain sensor, further the next step of processing is carried out, the air guide hole 4 is communicated with the external environment and the inside of the device, so that the air pressure inside the device is equal to the atmospheric pressure of the external environment, the natural air pressure balancing device is formed, the using error of the device is reduced, the first temperature sensor can eliminate the influence of temperature change on the strain sensor, the change of the strain sensor is enabled to be completely from the stress change of the strain sensor, data errors caused by human errors or environmental differences are effectively avoided, the real situation of ground settlement can be monitored in real time, meanwhile, the self health condition of the device can be monitored, the influence of the external environment on the measurement of the device is reduced, the use range of the device is further expanded, the device can be used in different geological environments, such as sand, forest lands and other areas with more environmental influences, and the strain sensor has the advantages of being good in waterproof performance, long in service life, good in anti-magnetic interference performance and the like, so that the device is suitable for long-term monitoring and can also be applied to areas affected by magnetic fields.
Specifically, please refer to fig. 1 to 7, which is provided with a base 1 and a housing 2, the base 1 is provided with a strain sensor, the upper end surface of the housing 2 is provided with an air guide hole 4 and a first temperature sensor, the upper end surface of the housing 2 is provided with a first temperature mounting groove 5 for mounting the first temperature sensor, the first temperature mounting groove 5 is arranged on one side of the upper end surface of the housing 2 close to the inner cavity, the strain sensor, the first temperature sensor can use a fiber grating sensor, the strain sensor is connected with a strain optical fiber, the first temperature sensor is connected with the first temperature optical fiber, the strain sensor is convenient to transmit a signal of the first temperature sensor, the air guide hole 4 is communicated with the inside and the outside environment of the device, the influence of the outside environment on the device is reduced, and the water inlet 6 and the water outlet 7 are convenient for water discharge.
As a specific embodiment of the device for measuring regional settlement based on the fiber bragg grating strain sensor according to the present invention, referring to fig. 1 to 7, a strain installation groove 3 for installing the strain sensor is disposed on a top surface of a base 1, a bottom optical fiber conduit 8 for passing through a strain optical fiber is disposed on the base 1, and the bottom optical fiber conduit 8 is communicated with the strain installation groove 3.
Specifically, referring to fig. 1 to 7, a bottom optical fiber conduit 8 is disposed on the base 1, the strain optical fiber penetrates into the bottom optical fiber conduit 8, and the strain optical fiber penetrates out of the device via the bottom optical fiber conduit 8 and is connected to an external armored optical cable, so as to protect the strain optical fiber, reduce the influence of the strain optical fiber, and improve the accuracy of the device.
As a specific embodiment of the device for measuring regional settlement based on the fiber bragg grating strain gauge sensors provided by the present invention, please refer to fig. 6 and 7, the strain gauge sensors are provided with three groups.
Specifically, referring to fig. 6 and 7, three sets of strain sensors are disposed on the base 1 to increase the measurement accuracy.
As a specific embodiment of the device for measuring regional settlement based on the fiber bragg grating strain sensors provided by the present invention, please refer to fig. 6 and 7, wherein three groups of strain sensors are distributed in a regular triangle.
Specifically, referring to fig. 6 and 7, three sets of strain sensors are uniformly distributed on the base 1, so as to increase the accuracy of measurement.
As a specific embodiment of the device for measuring regional settlement based on the fiber grating strain gauge sensor according to the present invention, referring to fig. 1 to 4, a top fiber guide 9 through which a first temperature fiber is inserted is disposed on the housing 2.
Specifically, referring to fig. 1 to 4, a top optical fiber conduit 9 is disposed on the housing 2, the first temperature optical fiber penetrates into the top optical fiber conduit 9, and the strain optical fiber penetrates out of the device and is connected to an external armored optical cable to protect the strain optical fiber, so that the influence of the strain optical fiber is reduced, and the accuracy of the device is improved.
Referring to fig. 1 to 4, a porous partition plate 10 is disposed in an inner cavity of a housing 2, and the inner cavity of the housing 2 is divided into an upper cavity and a lower cavity by the porous partition plate 10, which are communicated with each other.
Specifically, referring to fig. 1 to 4, a porous partition plate 10 is disposed in an inner cavity of the housing 2, so that the external bad weather and the soil entering the device during sedimentation can be effectively avoided, the health condition and the measurement accuracy of the device are prevented from being affected, and foreign matters are accumulated on the upper end face of the porous partition plate 10, so that the measurement accuracy of the device is not affected.
Referring to fig. 1 to 4, as a specific embodiment of a device for measuring regional settlement based on a fiber bragg grating strain gauge sensor, a second temperature installation groove 11 is formed in a lower end surface of a porous partition plate 10, and a second temperature sensor is installed in the second temperature installation groove 11 and connected with a second temperature optical fiber.
Specifically, referring to fig. 1 to 4, a second temperature sensor connected to a second temperature optical fiber is disposed on a lower end surface of the porous partition 10, the second temperature sensor can monitor a liquid level height inside the device, and if the liquid level height reaches an expected set safety position, the second temperature sensor feeds back different values, so as to achieve an early warning effect.
Referring to fig. 1 to 4, as a specific embodiment of the device for measuring regional settlement based on the fiber bragg grating strain gauge sensor, a middle connection hole 12 suitable for a second temperature optical fiber to pass through is formed at the bottom of the second temperature installation groove 11.
Specifically, referring to fig. 1 to 4, a middle connection hole 12 is formed at the bottom of the second temperature installation groove 11, and the second temperature optical fiber sequentially passes through the middle connection hole 12 and the top optical fiber guide tube 9 and is connected to the external armored optical cable, so as to protect the optical fiber, reduce the influence of the strain optical fiber, and improve the accuracy of the device.
As a specific embodiment of the device for measuring regional settlement based on the fiber bragg grating strain gauge sensor according to the present invention, referring to fig. 1 to 4, a mesh pipe head 13 is disposed at an upper end of the air vent 4, and the mesh pipe head 13 has an inverted U-shaped structure.
Specifically, referring to fig. 1 to 4, the mesh pipe head 13 is disposed at the upper end of the air vent 4, the mesh pipe head 13 includes a bent pipe and a separation net, the separation net is disposed inside the bent pipe, the mesh pipe head 13 communicates with the external environment and the inside of the device, and the free end of the bent pipe is bent downward to prevent soil particles or other foreign matters from entering the inside of the device, thereby further reducing the influence of the external environment on the device measurement.
As a specific embodiment of the device for measuring regional settlement based on the fiber bragg grating strain gauge sensor according to the present invention, referring to fig. 1, a water injection port 6 and a water discharge port 7 are symmetrically disposed at a lower end of a housing 2.
Specifically, referring to fig. 1, the water inlet 6 and the water outlet 7 are disposed at the lower end of the housing 2, so as to facilitate water filling and draining operations and reduce the influence on the device during water filling and draining.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a subside device based on fiber grating strain transducer measures region which characterized in that includes: the casing in the base top is established to base and cover, the casing is provided with the inner chamber that is used for retaining, the upper end of casing is equipped with the air guide hole, the air guide hole be used for with casing inner chamber and external intercommunication, install strain sensor on the base, strain sensor is connected with the optic fibre that meets an emergency, a temperature sensor is installed to the inboard of casing, a temperature sensor is connected with first temperature optic fibre still be provided with water filling port and outlet on the casing.
2. The fiber bragg grating-based strain gauge sensor measurement territory subsidence device of claim 1, wherein a strain installation groove for installing the strain sensor is formed in a top surface of the base, a bottom optical fiber guide pipe for penetrating the strain optical fiber is arranged on the base, and the bottom optical fiber guide pipe is communicated with the strain installation groove.
3. The fiber bragg grating-based strain gauge sensor geographical subsidence measuring apparatus of claim 1, wherein the strain sensors are provided in three groups.
4. The fiber grating-based strain sensor measurement zone settlement device of claim 3, wherein three sets of strain sensors are distributed in a regular triangle.
5. The fiber grating-based strain gauge sensor geographical subsidence apparatus of claim 1, wherein the housing is provided with a top fiber guide tube through which the first temperature fiber is inserted.
6. The fiber bragg grating-based strain gauge sensor measurement geographical subsidence apparatus of claim 1, wherein a porous partition is disposed in the inner cavity of the housing, and the porous partition divides the inner cavity of the housing into an upper cavity and a lower cavity which are communicated with each other.
7. The fiber bragg grating-based strain gauge sensor geographical subsidence measuring apparatus of claim 6, wherein a second temperature installation groove is formed on a lower end surface of the porous partition plate, a second temperature sensor is installed in the second temperature installation groove, and a second temperature optical fiber is connected to the second temperature installation groove.
8. The fiber bragg grating-based strain gauge sensor measurement territory subsidence device of claim 7, wherein the bottom of the second temperature installation groove is provided with a middle connecting hole suitable for the second temperature optical fiber to pass through.
9. The fiber bragg grating-based strain gauge sensor geographical subsidence measuring apparatus of claim 1, wherein a mesh pipe head is disposed at an upper end of the air guide hole, and the mesh pipe head has an inverted U-shaped structure.
10. The fiber bragg grating-based strain gauge sensor-based field settlement device of claim 1, wherein the water injection port and the water discharge port are symmetrically arranged at the lower end of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220295312.XU CN216717357U (en) | 2022-02-14 | 2022-02-14 | Regional settlement measuring device based on fiber bragg grating strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220295312.XU CN216717357U (en) | 2022-02-14 | 2022-02-14 | Regional settlement measuring device based on fiber bragg grating strain sensor |
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| CN216717357U true CN216717357U (en) | 2022-06-10 |
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| CN202220295312.XU Active CN216717357U (en) | 2022-02-14 | 2022-02-14 | Regional settlement measuring device based on fiber bragg grating strain sensor |
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- 2022-02-14 CN CN202220295312.XU patent/CN216717357U/en active Active
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