CN217276599U - High-sensitivity hydraulic assembly type optical fiber self-compensation pressure monitoring sensor - Google Patents
High-sensitivity hydraulic assembly type optical fiber self-compensation pressure monitoring sensor Download PDFInfo
- Publication number
- CN217276599U CN217276599U CN202220560339.7U CN202220560339U CN217276599U CN 217276599 U CN217276599 U CN 217276599U CN 202220560339 U CN202220560339 U CN 202220560339U CN 217276599 U CN217276599 U CN 217276599U
- Authority
- CN
- China
- Prior art keywords
- end cover
- piston
- grating
- compensating
- optical fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses a high sensitivity hydraulic pressure assembled optic fibre self compensating pressure monitoring sensor, including the diaphragm that meets an emergency, the end cover, a barrel, the assembly subassembly, the piston has connected gradually in the barrel, sensitive piece, fixed end, the compensating tube, the head end cover, be provided with the strain grating in the sensitive piece, set up temperature grating in the compensating tube, install at deep water open caisson lateral wall and tip through the assembly subassembly fast, need not field weld, to the sensor not damaged, and sealing performance is superior, vacuole formation between diaphragm and the end cover that meets an emergency, cavity and runner intussuseption are filled with hydraulic oil, the diaphragm that meets an emergency receives pressure deformation back, hydraulic oil transmits the piston through the runner, thereby produce the change of optical fiber signal through sensitive piece and the change of the strain grating perception pressure that corresponds, eliminate the influence of temperature to the pressure monitoring result through the temperature grating of establishing ties, the measurement stability of whole sensor is good, The sensitivity coefficient is large, and the test precision is high.
Description
Technical Field
The utility model relates to a ground soil pressure monitoring technical field. More specifically, the utility model relates to a high sensitivity hydraulic pressure assembled optic fibre self compensating pressure monitoring sensor.
Background
During large-scale open caisson sinking construction, accurate monitoring open caisson partition bottom soil pressure and lateral wall soil pressure are one of the key of construction control, generally adopt vibration wire formula soil pressure cell, and traditional vibration wire formula soil pressure cell measurement sensitivity is on the low side, and measurement accuracy is on the low side, and the installation is inconvenient on the steel construction wallboard moreover, and sealed effect is poor to need welding jobs, can harm the sensor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high sensitivity hydraulic pressure assembled optic fibre self compensating pressure monitoring sensor to solve among the prior art and to the technical problem that open caisson partition wall bottom soil pressure and lateral wall soil pressure monitoring sensitivity are low.
In order to realize the utility model discloses a according to these objects and other advantages, the utility model provides a high sensitivity hydraulic pressure assembled optic fibre self compensating pressure monitoring sensor is provided, including the diaphragm that meets an emergency, the end cover, the barrel, the periphery of the diaphragm that meets an emergency is provided with the round installation department along the axial, the outside of installation department is provided with the assembly subassembly that is used for with open caisson structure erection joint, end cover sealing connection is in the inboard of installation department, and form the cavity between end cover and the diaphragm that meets an emergency, the center department of end cover link up and is provided with the runner with the cavity intercommunication, the lateral surface at the end cover is connected to the one end of barrel, the cavity passes through the runner and communicates and the end cover with the inside of barrel, the diaphragm that meets an emergency, the axis coincidence of barrel, be full of hydraulic oil in cavity and the runner, the piston has set gradually along the direction of keeping away from the end cover in the barrel, sensitive piece, fixed end, the compensating tube, the end cover, the piston with the corresponding side, The inner walls of the cylinder body are respectively connected in a sealing mode, two ends of the sensitive piece are respectively connected with the piston on the corresponding side and the fixed end head in a fixed mode, strain gratings are bonded inside the sensitive piece, the sensitive piece is used for generating deformation according to pressure changes, the compensating pipe penetrates through the fixed end head and is arranged in the fixed end head in a close fit mode, a hole channel which is communicated in the axial direction is formed in the fixed end head corresponding to the compensating pipe, temperature gratings are bonded on the inner walls of the compensating pipe, the end head sealing cover is fixedly connected with the cylinder body and is connected with the fixed end head in an abutting mode, and the optical fibers penetrate through the end head sealing cover after being connected with the temperature gratings and the strain gratings in a series mode and are led out of the cylinder body.
Preferably, one end of the piston, which faces the end cover, is provided with a groove, the sectional dimension of the groove is larger than that of the flow passage, and the cavity, the flow passage and the groove are communicated and filled with the hydraulic oil together.
Preferably, the sensing piece includes the intermediate part, the pressure grating bonds in the inside of intermediate part, and the both ends of intermediate part are hugged closely respectively and are corresponded the side the piston or fixed end for produce deformation and pass through the pressure grating perception according to the pressure change that receives, the both ends of intermediate part still extend and are provided with the fixed part, every fixed part stretch into to correspond the side the piston or in the fixed end and with the piston or the fixed end threaded connection who corresponds the side.
Preferably, the assembly subassembly includes the closing plate, and the closing plate is connected the outside of installation department, be used for with the sealed laminating setting of open caisson steel sheet is connected through twisting bolted connection jointly between closing plate and the open caisson steel sheet, and the cover is equipped with the packing ring on the bolt.
Preferably, the sealing plate and the open caisson steel plate are in sealing connection through the asphalt felt sealing ring and the rubber sealing ring which are sequentially arranged on the outer side of the bolt connection, and the piston and the end cover are in sealing connection with the corresponding side of the cylinder body through the asphalt felt sealing ring and the rubber sealing ring.
The utility model discloses at least, include following beneficial effect:
(1) through the relative setting of the large-diameter strain membrane and the small-diameter flow channel, when the strain membrane is deformed by pressure, hydraulic oil is transmitted to the piston through the flow channel, the volume ratio is large, the amplification coefficient is large, the measured sensitivity coefficient is large, the precision is high, and the measured data stability is good due to the adoption of the temperature grating self-compensation technology.
(2) The amplification factor is adjusted by changing the film thickness of the strain diaphragm or the diameter of the cavity, namely adjusting the volume ratio, the measurement range can be adjusted as required, and the coverage area of the measurement range is large and can reach 0.2-10.0 MPa.
(3) The device is of an assembly type structure, can be quickly installed on the side wall and the end part of the deep water open caisson through a sealing plate, a bolt, a gasket and the like of an assembly component, does not need on-site welding, does not damage a sensor, and has excellent sealing performance.
(4) The pressure change is obtained by monitoring the change of the optical fiber signal, the mode is not interfered by an on-site electromagnetic environment and a humid environment, and compared with a vibrating wire sensor, the vibrating wire sensor has the advantages of no rusting and corrosion and long service life.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a front view structural diagram of the present invention;
FIG. 2 is a bottom view of the structure of FIG. 1;
fig. 3 is a schematic structural diagram of a sensor.
The specification reference numbers indicate: 1. the device comprises a strain diaphragm, 2, an installation part, 3, an end cover, 4, a cylinder, 5, a sensitive element, 6, a fixed end, 7, a compensating pipe, 8, an end cover, 9, a flow passage, 10, hydraulic oil, 11, a piston, 12, a strain grating, 13, a temperature grating, 14, a pore passage, 15, an assembly component, 16, a bolt, 17, a gasket, 18, a felt sealing ring, 19, a rubber sealing ring, 20, a sealing plate, 21, a sinking well steel plate, 22, a tail fiber, 23, a middle part, 24, a fixed part, 25 and a groove.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
In the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in figures 1-3, the utility model discloses a high sensitivity hydraulic pressure assembled optic fibre self compensating pressure monitoring sensor, including meeting an emergency diaphragm 1, end cover 3, barrel 4, the periphery of meeting an emergency diaphragm 1 is provided with round installation department 2 along the axial, the outside of installation department 2 is provided with the assembly subassembly 15 that is used for with open caisson structure erection joint, end cover 3 sealing connection is in the inboard of installation department 2, and form the cavity between end cover 3 and meeting an emergency diaphragm 1, the center department of end cover 3 link up and is provided with runner 9 with the cavity intercommunication, the lateral surface at end cover 3 is connected to the one end of barrel 4, the cavity passes through runner 9 and barrel 4's inside intercommunication and end cover 3, meet an emergency diaphragm 1, the axis coincidence of barrel 4, be full of hydraulic oil 10 in cavity and the runner 9, piston 11 has set gradually along the direction of keeping away from end cover 3 in the barrel 4, sensitive piece 5, fixed end 6, The compensating pipe 7, the end closing cap 8, seal connection between the piston 11 and the end cover 3 of the corresponding side, respectively between the inner walls of the barrel 4, the both ends of the sensitive element 5 respectively with the piston 11 of the corresponding side, fixed end 6 fixed connection, the inside of the sensitive element 5 bonds and has the strain grating 12, the sensitive element 5 is used for producing deformation according to the pressure change that receives, the compensating pipe 7 wears to establish in fixed end 6 and with the tight fit setting between the fixed end 6, correspond to the compensating pipe 7 on the fixed end 6 and set up the pore 14 that the axial link up, the inner wall of the compensating pipe 7 bonds and has the temperature grating 13, fixed connection between end closing cap 8 and the barrel 4 just contradicts with fixed end 6 and is connected, pass end closing cap 8 after the optic fibre series connection temperature grating 13 and strain grating 12 and draw forth from the barrel 4.
During installation, the strain membrane 1 and the end cover 3 are fixedly connected, and can adopt threaded connection or laser welding sealing, the end cover 3 and the cylinder 4 are assembled and connected, and can adopt threaded connection or laser welding sealing, the piston 11 is installed in the cylinder 4, the piston 11 is hermetically connected with the inner side wall of the cylinder 4, and the piston 11 is tightly attached to the corresponding side of the end cover 3, hydraulic oil 10 is filled in the cavity and the flow passage 9 and is abutted against the corresponding surface of the piston 11, the piston 11 is in threaded connection with the sensitive element 5 at the side deviating from the end cover 3, namely the lower end of the piston 11 shown in figure 1, the lower end of the sensitive element 5 is in threaded connection with the fixed end head 6, and is abutted against the corresponding side of the fixed end head 6 through the end cover 3, so that the positions of the piston 11, the sensitive element 5 and the fixed end head 6 in the cylinder 4 are fixed, one end of the optical fiber is fixedly bonded to the lower end of the piston 11, then the secondary series strain grating 12 passes through the hole 14 of the fixed end 6 to enter the compensating pipe 7, passes through the end sealing cover 8 after being connected with the temperature grating 13 in series, then leads out the tail fiber 22, and is connected with the external optical fiber signal monitoring equipment, when the strain diaphragm 1 is deformed by pressure, namely the outer side surface of the strain diaphragm 1 is a stress surface as shown in figure 1, after the pressure in the arrow direction is applied, the hydraulic oil 10 is transmitted to the piston 11 through the flow channel 9, the piston 11 transmits the pressure to the sensitive element 5, the sensitive element 5 senses the pressure to generate deformation, the change is sensed by the internal strain grating 12, the temperature grating 13 is used as the contrast of temperature compensation, the external optical fiber signal monitoring equipment acquires the signal difference value of the strain grating 12 and the temperature grating 13, the influence of the temperature on the measuring result can be eliminated, the measuring stability and the accuracy of the sensor are improved, and the area of the strain diaphragm 1 is large, the cross section sizes of the cavity and the flow channel 9 are relatively small, the volume ratio is large, the amplification factor is large, so that the device is high in testing precision, the measurement range is adjusted according to needs, the amplification factor can be adjusted by adjusting the volume ratio by adjusting the thickness of the film or the diameter of the box body, the coverage area of the measurement range is enlarged, and the coverage area can reach 0.2-10.0 MPa.
In another technical solution, as shown in fig. 1, a groove 25 is provided at one end of the piston 11 facing the end cover 3, a cross-sectional dimension of the groove 25 is larger than a cross-sectional dimension of the flow channel 9, and the cavity, the flow channel 9, and the groove 25 are communicated and filled with the hydraulic oil 10 together. By providing the groove 25, the contact area of the hydraulic oil 10 with the piston 11 is increased, and the area of pressure transmission is increased while the sealing performance is ensured.
In another technical solution, as shown in fig. 1 and 3, the sensitive element 5 includes a middle portion 23, the pressure grating is adhered inside the middle portion 23, two ends of the middle portion 23 are respectively attached to the corresponding piston 11 or the fixed end 6, and are configured to deform according to a change of a pressure received and to be sensed by the pressure grating, two ends of the middle portion 23 are further extended with fixing portions 24, and each fixing portion 24 extends into the corresponding piston 11 or the fixed end 6 and is in threaded connection with the corresponding piston 11 or the fixed end 6.
The fixing part 24 is arranged to facilitate the mounting and fixing connection of the sensitive element 5 with the piston 11 and the fixing end 6, and stabilize the position of the sensitive element 5 in the radial direction, so that the sensitive element 5 only senses the pressure change in the axial direction.
In another technical scheme, as shown in fig. 1 and 2, the assembling assembly 15 includes a sealing plate 20, the sealing plate 20 is connected to the outer side of the mounting portion 2, and is used for being attached to the open caisson steel plate 21 in a sealing manner, the sealing plate 20 and the open caisson steel plate 21 are connected by screwing a bolt 16 together, and a gasket 17 is sleeved on the bolt 16.
Through setting up the steel construction wallboard laminating setting of closing plate 20 and open caisson, the erection joint of being convenient for, fixed foil gage 1 that meets an emergency guarantees the stability and the accuracy of perception pressure change, guarantees simultaneously and the open caisson steel sheet 21 between sealed effect, need not weld foil gage 1 or end cover 3, can not cause the damage to the sensor.
In another technical scheme, as shown in fig. 1, the sealing plate 20 and the open caisson steel plate 21 are hermetically connected by sequentially arranging a felt seal ring 18 and a rubber seal ring 19 on the outer side of the connection of the bolt 16, and the piston 11, the end cover 3 and the corresponding side of the cylinder 4 are hermetically connected by respectively arranging the felt seal ring 18 and the rubber seal ring 19. By arranging the asphalt felt seal and the rubber sealing ring 19 in a matching manner, the sealing effect is improved.
To sum up, the high-sensitivity hydraulic assembly type optical fiber self-compensating pressure monitoring sensor of the utility model comprises a strain diaphragm, an end cover and a cylinder body, wherein the outer side of the strain diaphragm is connected with an assembly component, the strain diaphragm is quickly installed on the side wall and the end part of a deep water open caisson through the assembly component without field welding, the sensor is not damaged, the sealing performance is excellent, a cavity is formed between the strain diaphragm and the end cover, hydraulic oil is filled in the cavity and a flow channel, a piston, a sensitive element, a fixed end socket, a compensating pipe and an end cover are sequentially connected in the cylinder body, a strain grating is arranged in the sensitive element, a temperature grating is arranged in the compensating pipe, the influence of temperature on a pressure monitoring result is eliminated through the temperature grating, the measurement stability is good, when the strain diaphragm is deformed by pressure, the hydraulic oil is transmitted to the piston through the flow channel, and then the sensitive element and the corresponding strain grating sense the pressure change so as to generate the change of an optical fiber signal, because the volume ratio of the strain membrane to the flow channel is relatively large, and the amplification coefficient is large, the device has the advantages of large sensitivity coefficient and high test precision, and the measurement range can be changed by changing the thickness of the film or the diameter of the box body, so that the applicability is improved.
While the embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the description and illustrated embodiments, but is capable of being applied in all kinds of fields adapted to the invention, and further modifications may readily be made by those skilled in the art, and the invention is therefore not limited to the details given herein and to the drawings described herein, without departing from the general concept defined by the appended claims and their equivalents.
Claims (5)
1. The high-sensitivity hydraulic assembly type optical fiber self-compensating pressure monitoring sensor is characterized by comprising a strain diaphragm, an end cover and a cylinder body, wherein a circle of mounting part is axially arranged on the periphery of the strain diaphragm, an assembly component used for being mounted and connected with an open caisson structure is arranged on the outer side of the mounting part, the end cover is hermetically connected on the inner side of the mounting part, a cavity is formed between the end cover and the strain diaphragm, a flow channel communicated with the cavity is arranged at the center of the end cover in a penetrating manner, one end of the cylinder body is connected to the outer side surface of the end cover, the cavity is communicated with the inside of the cylinder body through the flow channel, the central axes of the end cover, the strain diaphragm and the cylinder body are superposed, hydraulic oil is filled in the cavity and the flow channel, a piston, a sensitive element, a fixed end, a compensating pipe and an end cover are sequentially arranged in the cylinder body along the direction far away from the end cover, the piston is hermetically connected with the end cover on the corresponding side and the inner wall of the cylinder body respectively, the both ends of sensitive piece respectively with the piston that corresponds the side, fixed end fixed connection, the inside bonding of sensitive piece has strain grating, sensitive piece is used for producing deformation according to the pressure variation who receives, the compensating tube wear to establish in the fixed end and with the fixed end between the tight fit setting, the pore that the axial link up is seted up to the compensating tube that corresponds on the fixed end, the inner wall bonding of compensating tube has temperature grating, fixed connection just contradicts with the fixed end between end closing cap and the barrel and is connected, pass the end closing cap behind the optic fibre series connection temperature grating and the strain grating and draw forth from the barrel.
2. The high-sensitivity hydraulic fabricated optical fiber self-compensating pressure monitoring sensor of claim 1, wherein a groove is provided at an end of the piston facing the end cap, the cross-sectional dimension of the groove is larger than that of the flow channel, and the cavity, the flow channel and the groove are arranged in a communicating manner and are filled with the hydraulic oil together.
3. The high-sensitivity hydraulic fabricated optical fiber self-compensating pressure monitoring sensor according to claim 1, wherein the sensing element comprises a middle portion, the pressure grating is adhered inside the middle portion, two ends of the middle portion are respectively tightly attached to the piston or the fixed end head on the corresponding side for generating deformation according to the pressure change and sensing through the pressure grating, two ends of the middle portion are further provided with fixing portions in an extending manner, and each fixing portion extends into the piston or the fixed end head on the corresponding side and is in threaded connection with the piston or the fixed end head on the corresponding side.
4. The high-sensitivity hydraulic fabricated optical fiber self-compensating pressure monitoring sensor according to claim 1, wherein the fabricated assembly comprises a sealing plate, the sealing plate is connected to the outer side of the mounting portion and is used for being in sealing fit with the open caisson steel plate, the sealing plate and the open caisson steel plate are connected through a bolt screwed together, and a gasket is sleeved on the bolt.
5. The high-sensitivity hydraulic fabricated optical fiber self-compensating pressure monitoring sensor according to claim 4, wherein the sealing plate and the open caisson steel plate are hermetically connected by sequentially arranging a felt sealing ring and a rubber sealing ring at the outer side of the bolted connection, and the piston and the corresponding sides of the end cover and the cylinder are hermetically connected by respectively arranging the felt sealing ring and the rubber sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220560339.7U CN217276599U (en) | 2022-03-15 | 2022-03-15 | High-sensitivity hydraulic assembly type optical fiber self-compensation pressure monitoring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220560339.7U CN217276599U (en) | 2022-03-15 | 2022-03-15 | High-sensitivity hydraulic assembly type optical fiber self-compensation pressure monitoring sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217276599U true CN217276599U (en) | 2022-08-23 |
Family
ID=82861005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220560339.7U Active CN217276599U (en) | 2022-03-15 | 2022-03-15 | High-sensitivity hydraulic assembly type optical fiber self-compensation pressure monitoring sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217276599U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117085614A (en) * | 2023-10-16 | 2023-11-21 | 大庆市镁华仪仪表衡器有限公司 | High-precision temperature and pressure transmitting controller |
-
2022
- 2022-03-15 CN CN202220560339.7U patent/CN217276599U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117085614A (en) * | 2023-10-16 | 2023-11-21 | 大庆市镁华仪仪表衡器有限公司 | High-precision temperature and pressure transmitting controller |
| CN117085614B (en) * | 2023-10-16 | 2024-01-09 | 大庆市镁华仪仪表衡器有限公司 | High-precision temperature and pressure transmitting controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217276599U (en) | High-sensitivity hydraulic assembly type optical fiber self-compensation pressure monitoring sensor | |
| CN101545817B (en) | Fiber grating osmotic pressure sensor with low measuring range | |
| CN100507484C (en) | High-performance optical fiber pressure sensor | |
| CN207163613U (en) | A kind of vertical diaphragm optical fiber pressure sensor device | |
| CN109828097B (en) | Device and method for measuring soil moisture content based on fiber Bragg grating | |
| CN108955769B (en) | Fiber grating soil pressure-osmotic pressure-temperature multi-parameter sensor | |
| CN105675201A (en) | Device and method for monitoring unidirectional force | |
| CN110940444A (en) | Fiber grating soil pressure sensor | |
| JP4929435B2 (en) | Pressure transducer | |
| CN112945438A (en) | Optical fiber type soil pressure sensor | |
| CN210464755U (en) | Optical fiber pressure sensor | |
| JPH0528770B2 (en) | ||
| CN112697059B (en) | Optical fiber ground deformation sensor for underwater soft medium | |
| CN113091994B (en) | High static pressure differential pressure transducer | |
| WO2015162113A1 (en) | Differential pressure sensor | |
| CN212409940U (en) | Fish-shaped fiber grating wide-range pressure sensor | |
| CN110607790B (en) | Deep sea static sounding probe | |
| CN210888922U (en) | Pressure maintaining cabin structure with glass window | |
| CN209841245U (en) | Vibrating wire type soil pressure gauge with deviation correcting function | |
| CN204286372U (en) | Be applicable to the fiber grating torque sensor structure of underwater environment | |
| CN113884228B (en) | Metallized fiber bragg grating stress sensor suitable for cold-rolled sheet shape detection | |
| EP1411336A1 (en) | Pressure transducer with capillary tube for high pressure measures | |
| US11898889B2 (en) | Pressure and flow rate measuring cell | |
| JPS58169042A (en) | Pressure transducer | |
| CN220153773U (en) | High-sensitivity piston type fiber Bragg grating pressure sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |