CN211856135U - Cylinder pressure deformation sensor and system - Google Patents
Cylinder pressure deformation sensor and system Download PDFInfo
- Publication number
- CN211856135U CN211856135U CN202020162083.5U CN202020162083U CN211856135U CN 211856135 U CN211856135 U CN 211856135U CN 202020162083 U CN202020162083 U CN 202020162083U CN 211856135 U CN211856135 U CN 211856135U
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- cylinder pressure
- grating
- deformation sensor
- optical fiber
- pressure deformation
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- 239000013307 optical fiber Substances 0.000 claims abstract description 40
- 239000000835 fiber Substances 0.000 claims abstract description 35
- 239000013013 elastic material Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000011435 rock Substances 0.000 abstract description 31
- 238000000411 transmission spectrum Methods 0.000 abstract description 10
- 230000008859 change Effects 0.000 abstract description 7
- 238000009530 blood pressure measurement Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a pressure measurement field mainly relates to cylinder pressure deformation sensor and system. The grating optical fiber is periodically wound on the periphery of the pressure-bearing part, wherein one end of the grating optical fiber is an incident end of light, the other end of the grating optical fiber is an emergent end of the light, the first fixing part and the second fixing part are respectively arranged at two ends of the pressure-bearing part, and is connected with both ends of the grating optical fiber, so that when the cylinder pressure deformation sensor is used for measuring the bearing capacity of the rock, when the rock deforms, a certain pressure is applied to one end of the cylinder pressure deformation sensor, so that the pressure-bearing part deforms, thereby causing the grating fiber wound on the periphery of the pressure-bearing part to deform, further changing the resonance period in the grating fiber, the transmission spectrum of the grating optical fiber is correspondingly changed, the deformation degree of the rock to be tested can be obtained through the change degree of the transmission spectrum of the grating optical fiber, and the bearing capacity of the rock to be tested can be accurately obtained.
Description
Technical Field
The utility model relates to a pressure measurement field mainly relates to a cylinder pressure deformation sensor and system.
Background
A method for knowing the water permeability of rock in geological drilling engineering during single-point method water pressing test and five-point method water pressing test. The single-point method is that the water pressure adopts single pressure, the water pressure time is 20min, and the water permeability is calculated according to the final value. For example, the pressure is 1.0 MPa. The pressurized water requirement reaches the stable standard and then the process is finished.
In the engineering detection process, the pressure bearing capacity of the rock is often required to be detected so as to prevent the insufficient pressure bearing capacity of the rock from influencing the safety performance of the engineering.
In the prior art, a single-point method is adopted to detect the bearing capacity of the rock, wherein the single-point method is that single pressure is adopted for water pressing, the water pressing time is 20min, the water permeability is calculated according to a final value, and the bearing capacity of the rock is estimated according to the water permeability.
The method has inaccurate detection on the bearing capacity of the rock.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cylinder pressure deformation sensor and system to the not enough among the above-mentioned prior art to solve among the prior art to the unsafe problem of detection of the bearing capacity of rock.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, the present application provides a cylinder pressure deformation sensor, the cylinder pressure deformation sensor includes: bearing portion, grating optic fibre, first fixed part and second fixed part, grating optic fibre cycle winding are in the bearing portion periphery, and wherein, grating optic fibre's one end is the incident end of light, and the other end is the outgoing end of light, and first fixed part and second fixed part set up respectively at the both ends of bearing portion to be connected with grating optic fibre's both ends.
Optionally, the period of winding of the grating fiber on the bearing portion is different.
Optionally, a period of an end of the grating fiber near the first fixing portion is greater than a period of an end of the grating fiber near the second fixing portion.
Optionally, the cylinder pressure deformation sensor further includes an elastic material layer disposed between the bearing portion and the grating fiber.
Optionally, the material of the bearing part is an elastic deformation material.
Optionally, the shape of the pressure bearing part is cylindrical or rectangular parallelepiped.
In a second aspect, the present application further provides another cylinder pressure deformation sensing system, the cylinder pressure deformation sensing system comprising: the optical fiber grating pressure deformation sensor comprises a light source, a wavelength detector and the cylinder pressure deformation sensor of any one of the first aspect, wherein the light source and the wavelength detector are respectively connected to an incident end and an emergent end of a grating optical fiber in the cylinder pressure deformation sensor.
The utility model has the advantages that:
the grating optical fiber is periodically wound at the periphery of the bearing part, wherein one end of the grating optical fiber is an incident end of light, the other end of the grating optical fiber is an emergent end of the light, the first fixing part and the second fixing part are respectively arranged at two ends of the bearing part and are connected with two ends of the grating optical fiber, so that when the cylinder pressure deformation sensor is used for measuring the bearing capacity of rocks, the cylinder pressure deformation sensor is arranged below the rocks, when the rocks are deformed, a certain pressure is applied to one end of the cylinder pressure deformation sensor, the bearing part is deformed, the grating optical fiber wound at the periphery of the bearing part is also deformed, the resonance period in the grating optical fiber is further changed, namely the transmission spectrum of the grating optical fiber is also correspondingly changed, and the deformation degree of the rocks to be measured can be obtained through the change degree of the transmission spectrum of the grating optical fiber, and then the bearing capacity of the rock to be tested can be accurately obtained.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a cylinder pressure deformation sensor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another cylinder pressure deformation sensor according to an embodiment of the present invention.
Icon: 10-a bearing part; 20-a grating fiber; 21-an incident end; 22-an exit end; 30-a first fixed part; 40-a second fixed part; 50-elastomeric layer.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to make the implementation of the present invention clearer, the following detailed description will be made with reference to the accompanying drawings.
Fig. 1 is the utility model provides a structural schematic diagram of cylinder pressure deformation sensor who provides, as shown in fig. 1, this application embodiment provides a cylinder pressure deformation sensor, and cylinder pressure deformation sensor includes: the grating optical fiber grating press-mounting structure comprises a bearing part 10, a grating optical fiber 20, a first fixing part 30 and a second fixing part 40, wherein the grating optical fiber 20 is wound around the periphery of the bearing part 10 periodically, one end of the grating optical fiber 20 is an incident end 21 of light, the other end of the grating optical fiber is an emergent end 22 of the light, and the first fixing part 30 and the second fixing part 40 are respectively arranged at two ends of the bearing part 10 and are connected with two ends of the grating optical fiber 20.
The grating fiber 20 may be a single mode fiber, or a multimode fiber, which is not limited herein, the length of the grating fiber 20 is selected according to the lateral circumference of the pressure-bearing part 10, which is not specifically limited herein, the grating fiber 20 is periodically wound on the surface of the pressure-bearing part 10, the length of each period is selected according to the actual situation, generally, the two ends of the grating fiber 20 are an incident end 21 and an exit end 22, respectively, the incident end 21 is generally connected with a light source, the exit end 22 is generally connected with a wavelength detector, the positions of the incident end 21 and the exit end 22 are set according to the actual needs, which is not specifically limited herein, the first fixing part 30 and the second fixing part 40 are used for fixing the incident end and the exit end 22 of the grating fiber 20, when the cylinder pressure deformation sensor is used for measuring the pressure-bearing capacity of a rock, the cylinder pressure sensor is disposed under the rock, when the rock deforms, a certain pressure is applied to one end of the cylinder pressure deformation sensor, so that the pressure-bearing part 10 deforms, thereby causing the grating fiber 20 wound around the outer circumference of the pressure receiving portion 10 to be deformed, thereby changing the resonance period of the grating fiber 20, that is, the transmission spectrum of the grating fiber 20 is changed correspondingly, the deformation degree of the rock to be tested can be obtained by the change degree of the transmission spectrum of the grating fiber 20, and the bearing capacity of the rock to be tested can be obtained accurately, the larger the change of the transmission spectrum of the grating fiber 20 is, the more obvious the change of the bearing capacity of the rock to be measured is, according to the time and the pressurizing size of the rock, the bearing limit of the rock can be obtained, and it should be noted that, the bearing limit of the rock is the point at which the change in the transmission spectrum of the grated fibre 20 is most pronounced.
Alternatively, the grating fibers 20 may be wound on the pressure bearing part 10 with different periods.
The grating optical fiber 20 is periodically wound on the surface of the pressure-bearing portion 10, the length of each period is selected according to actual conditions, the periods of winding of the grating optical fiber 20 on the pressure-bearing portion 10 are different, and may be the period of the upper portion of the pressure-bearing portion 10 greater than the period of the lower portion, or the period of the lower portion greater than the period of the upper portion, it should be noted that the upper portion and the lower portion of the pressure-bearing portion 10 are determined according to the setting position of the cylinder pressure deformation sensor, the lower portion is close to the horizontal plane on which the cylinder pressure deformation sensor is placed, and the upper portion is far away from the horizontal.
Alternatively, the period of the end of the grating fiber 20 near the first fixing portion 30 is greater than the period of the end of the grating fiber 20 near the second fixing portion 40.
The period of the grating fiber 20 at the end far away from the horizontal plane on which the cylinder pressure deformation sensor is placed is greater than the period at the end near the horizontal plane on which the cylinder pressure deformation sensor is placed, and each period corresponds to a resonance wavelength, so that the deformation of the upper part and the deformation of the lower part can be respectively measured, and the measurement result is more accurate.
Fig. 2 is a schematic structural diagram of another cylinder pressure deformation sensor according to an embodiment of the present invention, as shown in fig. 2, optionally, the cylinder pressure deformation sensor further includes an elastic material layer 50, and the elastic material layer 50 is disposed between the pressure-bearing portion 10 and the grating fiber 20.
The elastic material layer 50 is arranged between the pressure bearing portion 10 and the grating optical fiber 20, the elastic material layer 50 prevents the optical fiber from being worn, the pressure of the grating optical fiber 20 is more uniform in distribution, and the elastic material layer 50 disperses the pressure caused by the deformation of the cylinder, so that the measurement result is more accurate.
Alternatively, the material of the pressure receiving portion 10 is an elastically deformable material.
The bearing portion 10 can recover its original shape after the rock is subjected to pressure measurement, so that the bearing portion 10 is made of an elastic deformation material in the next measurement.
Alternatively, the pressure receiving portion 10 may have a cylindrical or rectangular parallelepiped shape.
The shape of the pressure receiving portion 10 may be cylindrical or rectangular, and is set according to actual needs, and is not particularly limited herein.
The grating optical fiber 20 is periodically wound on the periphery of the bearing part 10, wherein one end of the grating optical fiber 20 is an incident end 21 of light, the other end of the grating optical fiber is an emergent end 22 of light, the first fixing part 30 and the second fixing part 40 are respectively arranged at two ends of the bearing part 10 and are connected with two ends of the grating optical fiber 20, so that when the cylinder pressure deformation sensor is used for measuring the bearing capacity of rock, the cylinder pressure deformation sensor is arranged below the rock, when the rock deforms, a certain pressure is applied to one end of the cylinder pressure deformation sensor, the bearing part 10 deforms, the grating optical fiber 20 wound on the periphery of the bearing part 10 also deforms, the resonance period in the grating optical fiber 20 is changed, namely, the transmission spectrum of the grating optical fiber 20 also correspondingly changes, the deformation degree of the rock to be measured can be obtained through the change degree of the transmission spectrum of the grating optical fiber 20, and then the bearing capacity of the rock to be tested can be accurately obtained.
This application still provides another kind of cylinder pressure deformation sensing system, and cylinder pressure deformation sensing system includes: the optical fiber grating pressure deformation sensor comprises a light source, a wavelength detector and the cylinder pressure deformation sensor of any item, wherein the light source and the wavelength detector are respectively connected with an incident end 21 and an emergent end 22 of a grating optical fiber 20 in the cylinder pressure deformation sensor.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A cylinder pressure deformation sensor, characterized in that, cylinder pressure deformation sensor includes: the grating fiber is wound on the periphery of the pressure-bearing part periodically, one end of the grating fiber is an incident end of light, the other end of the grating fiber is an emergent end of the light, and the first fixing part and the second fixing part are arranged at two ends of the pressure-bearing part respectively and connected with two ends of the grating fiber.
2. A cylinder pressure deformation sensor according to claim 1, characterized in that the grating fibers are wound on the bearing portion with different periods.
3. A cylinder pressure deformation sensor according to claim 2, characterized in that the period of the end of the optical fiber grating near the first fixing portion is greater than the period of the end of the optical fiber grating near the second fixing portion.
4. The cylinder pressure deformation sensor according to claim 1, wherein the cylinder pressure deformation sensor further comprises an elastic material layer disposed between the bearing portion and the grating fiber.
5. The cylinder pressure deformation sensor according to claim 1, wherein the material of the pressure-bearing portion is an elastically deformable material.
6. The cylinder pressure deformation sensor according to claim 1, wherein the shape of the pressure-bearing portion is a cylindrical shape or a rectangular parallelepiped shape.
7. A cylinder pressure deformation sensing system, comprising: the cylinder pressure deformation sensor comprises a light source, a wavelength detector and the cylinder pressure deformation sensor according to any one of claims 1 to 6, wherein the light source and the wavelength detector are respectively connected with the incident end and the emergent end of the grating optical fiber in the cylinder pressure deformation sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020162083.5U CN211856135U (en) | 2020-02-11 | 2020-02-11 | Cylinder pressure deformation sensor and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020162083.5U CN211856135U (en) | 2020-02-11 | 2020-02-11 | Cylinder pressure deformation sensor and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211856135U true CN211856135U (en) | 2020-11-03 |
Family
ID=73232671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020162083.5U Expired - Fee Related CN211856135U (en) | 2020-02-11 | 2020-02-11 | Cylinder pressure deformation sensor and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211856135U (en) |
-
2020
- 2020-02-11 CN CN202020162083.5U patent/CN211856135U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201103 |
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| CF01 | Termination of patent right due to non-payment of annual fee |