CN109060204B - Optical fiber pressure monitoring system - Google Patents
Optical fiber pressure monitoring system Download PDFInfo
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- CN109060204B CN109060204B CN201811079206.2A CN201811079206A CN109060204B CN 109060204 B CN109060204 B CN 109060204B CN 201811079206 A CN201811079206 A CN 201811079206A CN 109060204 B CN109060204 B CN 109060204B
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- pressure
- circular tube
- sealing membrane
- optical fiber
- fixed
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 45
- 238000012544 monitoring process Methods 0.000 title claims abstract description 37
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 59
- 239000012528 membrane Substances 0.000 claims description 30
- 239000004020 conductor Substances 0.000 claims description 27
- 239000012530 fluid Substances 0.000 claims description 24
- 239000000758 substrate Substances 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 2
- 238000013139 quantization Methods 0.000 claims description 2
- 230000003044 adaptive effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
- G01L11/025—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means using a pressure-sensitive optical fibre
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention provides an optical fiber pressure monitoring system which solves the technical problems of poor accuracy and safety of the existing measuring means. The system comprises: the pressure conduction unit is used for stably fixing the measurement optical fiber pretension section and the pressure sensing surface which are connected with each other; the optical signal demodulator is used for collecting the optical signals conducted and reflected by the measuring optical fiber and forming optical signal quantized data; and the data processing terminal is used for converting the light signal quantized data into pressure data according to the built-in measurement model. By optimizing the rigid connection structure, creep deformation and stress deformation with negative effects are converted into pressure sensing surfaces capable of being measured efficiently, and measurement of mechanical pressure monitoring to high-precision photoelectric measuring ranges is achieved. The optimized rigid connection structure eliminates the potential leakage structural factor and simultaneously enables the combination of the rigid connection structure, the pressure pipeline and the container to be more flexible and reliable.
Description
Technical Field
The invention relates to the technical field of pressure monitoring, in particular to an optical fiber pressure monitoring system.
Background
In the prior art, a mechanical pressure gauge is generally adopted for measuring the fluid pressure in a pipeline, a measuring pipeline is formed by a plurality of branch pipe fittings, manual valves and interface conversion flanges which are sequentially connected between the mechanical pressure gauge and a pipeline measuring hole site during measurement, and a joint sealing part among all parts of the measuring pipeline is a high risk area for leakage, so that economic loss and potential personal injury can be caused once leakage occurs. Meanwhile, the mechanical pressure gauge has larger measurement error and poorer measurement instantaneity.
Disclosure of Invention
In view of the above problems, the embodiment of the invention provides an optical fiber pressure monitoring system, which solves the technical problems of poor accuracy and safety of the existing measuring means.
The optical fiber pressure monitoring system of the embodiment of the invention comprises:
the pressure conduction unit is used for stably fixing the measurement optical fiber pretension section and the pressure sensing surface which are connected with each other;
the optical signal demodulator is used for collecting the optical signals conducted and reflected by the measuring optical fiber and forming optical signal quantized data;
and the data processing terminal is used for converting the light signal quantized data into pressure data according to the built-in measurement model.
In an embodiment of the present invention, the optical signal quantized data is transmitted to the data processing terminal through an internet of things data channel.
In one embodiment of the present invention, the pressure conduction unit includes:
the base body is used for being rigidly connected with the pressure pipeline to form a base body cavity communicated with the pressure pipeline;
and the pressure conductor is used for sequentially forming a containing cavity, the pressure sensing surface and the fixing structure of the pretension section of the measuring optical fiber, so that the containing cavity is rigidly communicated with the matrix cavity.
In an embodiment of the present invention, the substrate includes a first cylinder and a first circular tube integrally formed, the first circular tube is fixed at the top of the first cylinder, the first circular tube and the first cylinder are coaxial, a fluid through hole is formed at the top of the first cylinder on the inner side of the sidewall of the first circular tube, the fluid through hole penetrates through the top and the bottom of the first cylinder, and the fluid through hole and the first circular tube form the substrate cavity.
In an embodiment of the present invention, fixing through holes are uniformly distributed around the outer side of the sidewall of the first circular tube at the top of the first cylinder, the fixing through holes vertically penetrate through the top and the bottom of the first cylinder, and connecting threads are formed on the outer side of the sidewall of the first circular tube 130.
In an embodiment of the present invention, the side wall of the first column is provided with a number of flow guiding through holes equal to the number of the fluid through holes, the axis of the flow guiding through holes is perpendicular to the axis of the fluid through holes, and the flow guiding through holes are one-to-one communicated with the fluid through holes.
In an embodiment of the present invention, the pressure conductor includes a second circular tube and a sealing membrane, where the outer diameter of the second circular tube is equal to or smaller than the outer diameter of the first cylinder, the inner diameter of the second circular tube is equal to the outer diameter of the first circular tube, the sealing membrane covers the top of the second circular tube to form the accommodating cavity with one sealed end of the second circular tube, the first circular tube is partially inserted into the accommodating cavity so that the accommodating cavity is partially fused with the base body cavity, and the thickness of the sealing membrane serving as the pressure sensing surface is smaller than the thickness of the first circular tube and the second circular tube.
In an embodiment of the present invention, the bottom end surface of the second circular tube is uniformly provided with the fixing blind holes along the circumferential direction, and the inner surface of the sidewall of the second circular tube 160 forms the adapting threads.
In one embodiment of the present invention, the pressure conductor further includes a first fixing structure, a second fixing structure, and an integrally formed fixed portal frame, where the fixed portal frame includes a rectangular beam, a first column, and a second column, the axes of which are located in the same plane, the top of the first column is fixed at one end of the rectangular beam, the bottom of the first column is fixed on the top end surface of the second round tube, the top of the second column is fixed at the other end of the rectangular beam, the bottom of the second column is fixed on the top end surface of the second round tube, the rectangular beam is parallel to the sealing membrane, the axes of the rectangular beam extend along the determined diameter direction of the second round tube, a pair of extending side walls in the extending direction of the rectangular beam are substantially parallel to the sealing membrane, another pair of extending side walls are perpendicular to the sealing membrane and serve as perpendicular extending side walls, one vertical extending side wall and the fixed diameter are flush to form a fixed extending side wall, the first fixing structure is a flat plate which is positioned on the same plane as the fixed extending side wall, a first group of parallel through grooves which are vertical to the sealing diaphragm are formed in the middle of the flat plate, the first fixing structure is positioned in the center of the sealing diaphragm, the second fixing structure is a second group of parallel through grooves which are vertical to the top of the sealing diaphragm, the second group of parallel through grooves are positioned on the fixed extending side wall and correspond to the first group of parallel through grooves, and the corresponding through grooves in the first group of parallel through grooves and the second group of parallel through grooves are respectively used for fixing one end part of one pretension section of the measuring optical fiber, and the second round pipe, the sealing diaphragm, the fixed portal frame, the second round pipe, the fixed portal frame and the fixed portal frame, the first and second fixing structures serve as the fixing structures.
In an embodiment of the present invention, the end surface of the sealing membrane adopts a non-flat surface.
According to the optical fiber pressure monitoring system provided by the embodiment of the invention, through optimizing the rigid connection structure, creep deformation and stress deformation with negative effects in the measuring unit are converted into pressure sensing surfaces capable of being measured efficiently, and the measurement of mechanical pressure monitoring to high-precision photoelectric measuring ranges is realized. The optimized rigid connection structure eliminates the potential leakage structural factor and simultaneously enables the combination of the rigid connection structure, the pressure pipeline and the container to be more flexible and reliable.
Drawings
Fig. 1 is a schematic diagram of an optical fiber pressure monitoring system according to an embodiment of the invention.
FIG. 2 is a schematic diagram showing the axial components of a pressure transmission unit in an optical fiber pressure monitoring system according to an embodiment of the present invention.
FIG. 3 is a schematic front view of a substrate of a pressure-conducting unit in an optical fiber pressure monitoring system according to an embodiment of the present invention.
FIG. 4 is a schematic top view of a substrate of a pressure-conducting unit in an optical fiber pressure monitoring system according to an embodiment of the present invention.
Fig. 5 is a schematic front view of a pressure conductor of a pressure transmission unit in an optical fiber pressure monitoring system according to an embodiment of the present invention.
Fig. 6 is a schematic top view of a pressure conductor of a pressure transmission unit in an optical fiber pressure monitoring system according to an embodiment of the invention.
FIG. 7 is a schematic partial front cross-sectional view of a pressure conductor of a pressure conducting unit in an optical fiber pressure monitoring system according to an embodiment of the present invention.
Fig. 8 is a schematic partial front cross-sectional view of a pressure conductor of a pressure conducting unit in an optical fiber pressure monitoring system according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the drawings and the detailed description below, in order to make the objects, technical solutions and advantages of the present invention more apparent. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The optical fiber pressure monitoring system comprises a pressure sensing surface and a measuring optical fiber, wherein the measuring optical fiber forms a pretension section, and the pretension section is fixedly connected with the pressure sensing surface while being stable and stable.
The pressure sensing surface carries line pressure, either locally in the pressure line or locally in the pressure line branch.
The pretension section is formed by stretching a portion of the measurement fiber and providing structures at both ends of the stretched portion at a fixed interval.
In the optical fiber pressure monitoring system of the embodiment of the invention, the pressure sensing surface has a correlative influence on the pretension of the measured optical fiber, the deformation of the pressure sensing surface is correlative with the fluid pressure in the pressure pipeline, and a person skilled in the art can understand that the change of the pretension of the optical fiber can cause the transmission characteristic of the optical fiber conducted optical signal to generate high-precision quantitative change, and the high-precision pressure change signal can be obtained by collecting and processing the quantitative change. According to the optical fiber pressure monitoring system provided by the embodiment of the invention, by optimizing the rigid connection structure, creep deformation and stress deformation with negative effects are converted into pressure sensing surfaces (sealing diaphragms) capable of being measured efficiently, and the measurement of mechanical pressure monitoring to high-precision photoelectric measuring ranges is realized. The optimized rigid connection structure eliminates the potential leakage structural factor and simultaneously enables the combination of the rigid connection structure, the pressure pipeline and the container to be more flexible and reliable.
An optical fiber pressure monitoring system according to an embodiment of the present invention is shown in fig. 1. In fig. 1, it includes:
a pressure conduction unit 100 for stably fixing the measurement fiber pretension section and the pressure sensing surface connected to each other;
an optical signal demodulator 200 for collecting the optical signal reflected by the measurement fiber and forming optical signal quantization data;
the data processing terminal 300 is used for converting the light signal quantized data into pressure data according to the built-in measurement model.
The optical fiber pressure monitoring system of the embodiment of the invention forms the functions of pressure conduction, optical signal measurement and pressure quantification into the independent system component modules, so that each module of the optical fiber pressure monitoring system can be independently upgraded and maintained, and the purchasing cost of the system is reduced.
As shown in fig. 1, in an embodiment of the present invention, the optical signal quantized data is transmitted to the data processing terminal 300 through the data channel 400 of the internet of things.
The optical fiber pressure monitoring system provided by the embodiment of the invention is combined with the transmission technology of the Internet of things to realize real-time distributed acquisition of pressure signals, centralized conversion of optical signal quantized data and centralized monitoring of pipeline pressure.
The pressure conduction unit of the optical fiber pressure monitoring system of the embodiment of the invention is shown in fig. 2. In fig. 2, the pressure conducting unit 100 comprises a base 110 and a pressure conductor 150, wherein:
a base 110 for rigid connection with the pressure line, forming a base cavity 111 in communication with the pressure line;
a pressure conductor 150 for sequentially forming a receiving cavity 151, a pressure sensing surface 152 and a fixing structure 153 for measuring the pretension section of the optical fiber, so that the receiving cavity 151 is in rigid communication with the base cavity 111.
The base 110 of the accommodating cavity 151 and the pressure conductor 150 are rigidly fixed along the axial direction, and the pressure pipeline and the base cavity are in sealing connection with the accommodating cavity.
The pressure conduction unit 100 of the embodiment of the invention ensures the overall rigidity strength and the tightness of the component connection by optimizing the number of the components, and simultaneously has the replaceability, thereby greatly reducing the field maintenance difficulty and improving the system usability.
The structure of the base 110 is shown in fig. 3. As shown in fig. 3 and 4, the base 110 includes a first cylinder 120 and a first circular tube 130 integrally formed, the first circular tube 130 is fixed on top of the first cylinder 120, and the first circular tube 130 is coaxial with the first cylinder 120. Fixing through holes 121 are uniformly distributed around the outer side of the side wall of the first circular tube 130 at the top of the first column 120, and the fixing through holes 121 vertically penetrate through the top and bottom of the first column 120. A fluid through hole 122 is formed in the inner side of the sidewall of the first circular tube 130 at the top of the first cylinder 120, and the fluid through hole 122 penetrates through the top and bottom of the first cylinder 120.
The fluid through-hole 122 and the first round tube 130 form the substrate cavity 111.
The substrate 110 in the embodiment of the invention is uniformly processed by adopting an integral material, the structural strength of the substrate can bear the communicated fluid pressure by selecting the material, and the substrate is uniformly stressed and uniformly creeps after bearing pressure, so that the stability of the integral structure is not adversely affected. Meanwhile, the structural stability of the base 110 ensures that various welding modes can be adopted when the base 110 and the pressure pipeline (or the pressure container) form rigid connection to complete reliable airtight communication.
In an embodiment of the present invention, the fixing holes 121 are uniformly distributed around the outer side of the sidewall of the first circular tube 130 at the top of the first column 120, and the fixing holes 121 vertically penetrate through the top and bottom of the first column 120.
In one embodiment of the present invention, the connecting threads 131 are formed on the outer surface of the sidewall of the first circular tube 130.
The base 110 of the embodiment of the invention can be connected with a conversion structure on the existing test hole site of the pressure pipeline by bolts, and is matched with a sealing material to form reliable rigid sealing connection. While the connecting threads 131 provide additional reinforcement and a smooth alignment for subsequent connection of the pressure conductor 150.
In an embodiment of the present invention, the first column 120 includes two fluid through holes 122, the same number of diversion holes 123 as the fluid through holes 122 are formed on the sidewall of the first column 120, the axis of the diversion holes 123 is perpendicular to the axis of the fluid through holes 122, and the diversion holes 123 are one-to-one communicated with the fluid through holes 122.
The substrate 110 of the embodiment of the present invention forms a necessary pressure relief channel by using the flow guiding through hole 123, and the flow guiding through hole 123 can be connected with a pressure relief valve to protect the pressure sensitive device from accidental damage. The diversion through hole 123 can also be used as a measuring signal connection channel of other measuring instruments.
The structure of the pressure conductor 150 is shown in fig. 5. As shown in connection with fig. 5 and 6, the pressure conductor 150 includes an integrally formed second circular tube 160 and sealing diaphragm 170, the second circular tube 160 having an outer diameter equal to or smaller than the outer diameter of the first cylinder 120 and the second circular tube 160 having an inner diameter equal to the outer diameter of the first circular tube 130. The sealing membrane 170 covers the top of the second circular tube 160 so that the second circular tube 160 forms a receiving cavity 151 with one end sealed. The first circular tube 130 is partially inserted into the second circular tube 160 such that the receiving cavity 151 is partially fused with the base cavity 111 of the base 110.
Sealing diaphragm 170 acts as pressure sensing surface 152, and sealing diaphragm 170 has a thickness that is less than the wall thickness of other round tubes and cylinders. The ratio of the thickness of the sealing membrane 170 to the thickness of the other round tube and cylinder is less than 1:8.
the pressure conductor 150 in the embodiment of the invention is uniformly processed by adopting the whole material, and the material selection ensures that the structural strength of the pressure conductor 150 can bear the communicated fluid pressure, and the pressure conductor 150 is uniformly stressed after the main body of the pressure conductor 150 bears pressure and generates uniform creep, so that the stability of the whole structure is not adversely affected. Meanwhile, the structural stability of the pressure conductor 150 ensures that various welding modes can be adopted when the base 110 and the pressure conductor 150 form rigid connection to complete reliable cavity closed communication. While a smaller thickness of sealing diaphragm 170 ensures that the same creep and stress deformation effects can reflect a stronger elastic deformation on sealing diaphragm 170.
In an embodiment of the present invention, the bottom end surface of the second circular tube 160 is uniformly provided with the fixing blind holes 161 along the circumferential direction, and the fixing blind holes 161 correspond to the fixing through holes 121 of the base 110.
In one embodiment of the present invention, the inner surface of the sidewall of the second circular tube 160 is formed with a mating thread (not shown in the drawings).
The pressure conductor 150 of the embodiment of the present invention can be bolted with the fixing through hole 121 of the base 110 by using the fixing blind hole 161, and form a reliable rigid sealing connection with a sealing material. While the mating threads provide additional reinforcement and a smooth alignment for corresponding connection with the connection threads 131 of the base 110.
Referring to fig. 5 and 6, the pressure conductor 150 further includes a fixed portal frame 180 integrally formed with the second circular tube 160 and the sealing membrane 170, a first fixing structure 190, and a second fixing structure 195, the fixed portal frame 180 includes a rectangular cross member 181 having an axis on the same plane, a first pillar 182, and a second pillar 183, the top of the first pillar 182 is fixed to one end of the rectangular cross member 181, the bottom of the first pillar 182 is fixed to the top end surface of the second circular tube 160, the top of the second pillar 183 is fixed to the other end of the rectangular cross member 181, the bottom of the second pillar 183 is fixed to the top end surface of the second circular tube 160, the rectangular cross member 181 is substantially parallel to the sealing membrane 170, and the axis of the rectangular cross member 181 extends along the determined diameter direction of the second circular tube 160. One pair of extending side walls in the extending direction of the rectangular beam 181 is substantially parallel to the sealing diaphragm 170, and the other pair of extending side walls is substantially perpendicular to the sealing diaphragm 170 as perpendicular extending side walls, one of which is flush (in the same plane) with a certain diameter defining the extending direction of the rectangular beam 181 to form a fixed extending side wall 184.
The first fixing structure 190 is a flat plate, the flat plate and the fixed extension side wall 184 are located on the same plane, a first group of parallel through grooves 191 are formed in the middle of the flat plate, the first group of parallel through grooves 191 are perpendicular to the sealing membrane 170, and the first fixing structure 190 is located at the center of the sealing membrane 170.
The second fixing structure 195 is a second set of parallel through slots 196, and the second set of parallel through slots 196 is located on the fixing extension side wall 184 corresponding to the first set of parallel through slots 191.
The corresponding channels of the first set 191 and the second set 196 are each used to secure one end of one pretensioned segment of the measuring fiber.
Second circular tube 160, sealing diaphragm 170, stationary gantry 180, first stationary structure 190, and second stationary structure 195 are used as stationary structures.
The pressure conductor 150 of the embodiment of the present invention forms a pretension segment fixing structure of the measurement optical fiber by using the first fixing structure 190 and the second fixing structure 195, so that the pretension segment and the pressure sensing surface 152 form a rigid connection, and pressure deformation change of the pressure sensing surface 152 is effectively fed back.
Based on the basic structure of the above embodiment, the pressure conductor of the optical fiber pressure monitoring system according to an embodiment of the present invention is shown in fig. 7. In fig. 7, the bottom of sealing membrane 170 forms a smooth transition of annular protrusions 171 to radially space the center of sealing membrane 170.
The optical fiber pressure monitoring system of the embodiment of the invention can ensure isotropy of the sealing diaphragm 170 when the sealing diaphragm 170 bears creep deformation and stress deformation generated by pressure by utilizing the annular protrusion 171, and avoid the reduction of service life caused by unbalanced internal stress of the sealing diaphragm 170.
Based on the basic structure of the above embodiment, the pressure conductor of the optical fiber pressure monitoring system according to an embodiment of the present invention is shown in fig. 8. In fig. 8, the sealing diaphragm 170 is in a shape of a circular plate, the edge of the sealing diaphragm 170 faces the center, the top surface of the sealing diaphragm gradually and smoothly faces down to form a top arc surface 172, the edge of the sealing diaphragm 170 faces the center, and the bottom surface of the sealing diaphragm gradually and smoothly faces up to form a bottom arc surface 173.
The optical fiber pressure monitoring system of the embodiment of the invention forms a stronger holding structure by utilizing the top cambered surface 172 and the bottom cambered surface 173, and can effectively enhance the effective measuring range of the sealing diaphragm 170 on the fluid pressure by adjusting the radian difference of the top cambered surface 172 and the bottom cambered surface 173, and can better adapt to the large tension structure of the pretension section.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (5)
1. A fiber optic pressure monitoring system, comprising:
the pressure conduction unit is used for stably fixing the measurement optical fiber pretension section and the pressure sensing surface which are connected with each other;
the optical signal demodulator is used for collecting the optical signals conducted and reflected by the measuring optical fiber and forming optical signal quantized data;
the data processing terminal is used for converting the light signal quantized data into pressure data according to a built-in measurement model;
the pressure conduction unit includes:
the base body is used for being rigidly connected with the pressure pipeline to form a base body cavity communicated with the pressure pipeline;
the pressure conductor is used for sequentially forming a containing cavity, the pressure sensing surface and the measurement optical fiber pretension section fixing structure, so that the containing cavity is rigidly communicated with the matrix cavity;
the substrate comprises a first cylinder and a first circular tube which are integrally formed, the first circular tube is fixed at the top of the first cylinder, the first circular tube and the first cylinder are coaxial, a fluid through hole is formed in the inner side of the side wall of the first circular tube at the top of the first cylinder, the fluid through hole penetrates through the top and the bottom of the first cylinder, and the fluid through hole and the first circular tube form a substrate cavity; uniformly arranging fixing through holes around the outer side of the side wall of the first circular tube at the top of the first column, wherein the fixing through holes vertically penetrate through the top and the bottom of the first column, and connecting threads are formed outside the side wall of the first circular tube 130;
the pressure conductor comprises a second circular tube and a sealing diaphragm, wherein the second circular tube is integrally formed, the outer diameter of the second circular tube is equal to or smaller than the outer diameter of the first cylinder, the inner diameter of the second circular tube is equal to the outer diameter of the first circular tube, the sealing diaphragm covers the top of the second circular tube to enable the second circular tube to form a containing cavity with one sealed end, the first circular tube is partially inserted into the containing cavity to enable the containing cavity to be partially fused with the base body cavity, and the thickness of the sealing diaphragm serving as a pressure sensing surface is smaller than the thickness of the first circular tube and the second circular tube; the bottom end surface of the second circular tube is uniformly provided with fixed blind holes along the circumferential direction, and the inner surface of the side wall of the second circular tube 160 is provided with an adaptive thread;
the fixed blind hole is connected with the fixed through hole through a bolt, and the adapting thread is correspondingly connected with the connecting thread.
2. The fiber optic pressure monitoring system of claim 1, wherein the optical signal quantization data is transmitted to the data processing terminal via an internet of things data channel.
3. The optical fiber pressure monitoring system according to claim 1, wherein the side wall of the first cylinder is provided with a same number of flow guide through holes as the fluid through holes, the axes of the flow guide through holes are perpendicular to the axes of the fluid through holes, and the flow guide through holes are communicated with the fluid through holes one by one.
4. The optical fiber pressure monitoring system according to claim 1, wherein the pressure conductor further comprises a first fixing structure, a second fixing structure and an integrally formed fixing portal frame, the fixing portal frame comprises a rectangular beam, a first upright and a second upright, the axes of which are located on the same plane, the top of the first upright is fixed on one end of the rectangular beam, the bottom of the first upright is fixed on the top end face of the second round tube, the top of the second upright is fixed on the other end of the rectangular beam, the bottom of the second upright is fixed on the top end face of the second round tube, the rectangular beam is parallel to the sealing membrane, the axes of the rectangular beam extend along the determined diameter direction of the second round tube, a first pair of extending side walls in the extending direction of the rectangular beam are substantially parallel to the sealing membrane, another pair of extending side walls are perpendicular to the sealing membrane and serve as perpendicular extending side walls, one perpendicular extending side wall forms a fixing extending side wall with the determined diameter, the first fixing structure is a flat plate located on the same plane as the extending side walls, the flat plate is fixed on the middle of the fixing side walls, the flat plate is parallel to the sealing membrane, the first set of parallel to the sealing membrane is parallel to the first set of sealing membrane, the set of parallel to the sealing membrane is parallel to the first set of the sealing membrane, and the set of parallel to the sealing membrane is parallel to the first set of the sealing membrane and the set of the parallel to the sealing membrane is measured by the first set of parallel to the sealing membrane and the parallel to the first set to the sealing membrane and the sealing membrane respectively, the fixed portal frame, the first fixed structure and the second fixed structure serve as the fixed structures.
5. The fiber optic pressure monitoring system of claim 1, wherein the end face of the sealing membrane has a non-planar surface.
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| CN201811079206.2A CN109060204B (en) | 2018-09-14 | 2018-09-14 | Optical fiber pressure monitoring system |
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| CN201811079206.2A CN109060204B (en) | 2018-09-14 | 2018-09-14 | Optical fiber pressure monitoring system |
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| CN109060204B true CN109060204B (en) | 2023-11-28 |
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2018
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| CN201653609U (en) * | 2010-03-15 | 2010-11-24 | 无锡光芯科技有限公司 | Fiber bragg grating pressure sensor |
| CN202402851U (en) * | 2011-10-25 | 2012-08-29 | 上海泛华紧固系统有限公司 | Connection structure of length-adjustable detaching-proof threaded union of meter tube |
| CN205607584U (en) * | 2016-04-28 | 2016-09-28 | 杭州聚华光电科技有限公司 | Fiber grating air pressure sensor |
| CN105784260A (en) * | 2016-05-06 | 2016-07-20 | 武汉航空仪表有限责任公司 | Novel pressure sensor |
| CN206114181U (en) * | 2016-09-30 | 2017-04-19 | 中国通信建设第二工程局有限公司 | Flange joint's threaded connection diaphragm -seal pressure gauge structure |
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| CN109060204A (en) | 2018-12-21 |
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