CN117191219A - Fiber bragg grating fluid temperature measurement structure with impact protection function - Google Patents
Fiber bragg grating fluid temperature measurement structure with impact protection function Download PDFInfo
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- CN117191219A CN117191219A CN202311220955.3A CN202311220955A CN117191219A CN 117191219 A CN117191219 A CN 117191219A CN 202311220955 A CN202311220955 A CN 202311220955A CN 117191219 A CN117191219 A CN 117191219A
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- 239000000835 fiber Substances 0.000 title claims abstract description 65
- 239000012530 fluid Substances 0.000 title claims abstract description 50
- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 45
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052802 copper Inorganic materials 0.000 claims abstract description 43
- 239000010949 copper Substances 0.000 claims abstract description 43
- 230000001681 protective effect Effects 0.000 claims abstract description 37
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 26
- 239000003292 glue Substances 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 7
- 239000013307 optical fiber Substances 0.000 description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The application belongs to the technical field of temperature measurement structures, and discloses a fiber bragg grating fluid temperature measurement structure with an impact protection function, which comprises a threaded pipe, a protection sleeve and a temperature sensor, wherein the protection sleeve is arranged in a through hole of the threaded pipe, one side of the protection sleeve is provided with a liquid inlet hole, the other side of the protection sleeve is provided with a liquid outlet hole, the temperature sensor comprises a capillary copper pipe and a fiber bragg grating, the capillary copper pipe is coaxially arranged in the protection sleeve in a penetrating way, and the fiber bragg grating is inserted into the capillary copper pipe; through the protective sleeve of design outside trompil, guarantee temperature sensor direct contact liquid avoided the unstable scheduling problem of temperature measurement that direct impact effect of liquid brought simultaneously. When liquid enters the protective sleeve pipe and flows through the outer side of the capillary copper pipe, the high thermal expansion performance of the capillary copper pipe enables the sensitivity of the temperature sensor to be greatly improved compared with that of the bare fiber grating, and meanwhile the fiber grating is protected from vibration or grating area corrosion caused by direct contact with the liquid.
Description
Technical Field
The application belongs to the technical field of temperature measurement structures, and particularly relates to a fiber bragg grating fluid temperature measurement structure with an impact protection function.
Background
In the current aviation pipeline or other pipelines, a bimetal thermometer, a platinum resistance thermometer or a thermocouple thermometer is often used for measuring the temperature of fluid in the aviation pipeline or other pipelines, and because the bimetal thermometer is based on the difference of the thermal expansion coefficients of two metals, the bimetal thermometer shows inconsistent stretching effect under the condition of being subjected to the same temperature, and the difference is used for driving a pointer to rotate so as to display a temperature value. Such a bimetal thermometer needs to ensure a sufficient stretching space of the two metal sheets in the protective sleeve rod, which is a precondition for ensuring a response temperature measurement range, and thus it is also a key that the bimetal sensor is difficult to achieve miniaturization.
The resistor has the problems of heat dissipation, current thermal effect, complete immersion of the resistor possibly caused by a pipeline path, and the like, so that the accuracy of a result is influenced when the temperature of fluid is accurately measured. The fiber grating sensor can realize light weight and miniaturization based on the characteristics of small volume and light weight of the fiber grating, and the tubular fiber grating thermometer can protect the fiber grating through a metal tube, so that a practical method for landing the fragile fiber grating which is easy to break and difficult to directly use is provided. The fiber grating temperature measuring element is a detection device for acquiring sensing information by causing the central wavelength of the fiber grating to move through the temperature of the external environment. Because of the advantages of high sensitivity, small volume, corrosion resistance, electromagnetic radiation resistance and the like, the manufacturing technology is continuously perfect and has been widely used.
The existing structure for measuring the temperature of the fluid in the pipeline is to directly insert a temperature sensor into the pipeline. And the sensors such as bimetallic strips, platinum resistors, thermocouples and the like have large structural volume and complex design, and are difficult to be suitable for small-diameter pipelines. The existing fiber grating temperature sensor is also in a mode of being directly inserted into a fluid pipeline, measurement errors which are difficult to avoid are not considered due to direct impact of fluid in a pipe on the sensor, and the temperature sensor directly inserted into the pipeline is sensitive to temperature and strain based on the fiber grating, so that decoupling of the temperature and impact strain can be achieved, and unavoidable challenges are brought to structural design. Therefore, the conventional fiber bragg grating temperature sensor adopts an indirect non-invasive mode for measuring the fluid temperature, the sensor is fixedly arranged on the outer wall of the tube, and the temperature correlation between the outer wall of the tube and the fluid in the tube is established to indirectly reflect the fluid temperature in the tube.
It is therefore a problem to be solved how to measure the temperature of a fluid while achieving high accuracy and small volumes.
Disclosure of Invention
The application aims to provide a fiber bragg grating fluid temperature measurement structure with an impact protection function, which solves or reduces at least one problem in the background art.
The technical scheme of the application is as follows: a fiber bragg grating fluid temperature measurement structure with an impact protection function comprises a threaded pipe, a protection sleeve and a temperature sensor; the temperature sensor comprises a capillary copper pipe and an optical fiber grating, the capillary copper pipe is coaxially arranged in the protective sleeve in a penetrating manner, the optical fiber grating is inserted into the capillary copper pipe, and a grating region of the optical fiber grating is positioned in the middle of the capillary copper pipe; when the fluid enters the threaded pipe and flows through the protective sleeve, part of the fluid flows in from the liquid inlet hole of the protective sleeve, flows out from the liquid outlet hole and fills the protective sleeve.
Preferably, an annular groove is formed in the position, corresponding to the outer side of the through hole, of the threaded pipe, a plug is installed in the annular groove, the outer wall of the plug is in sealing connection with the inner wall of the through hole, and the inner wall of the plug is in sealing connection with the outer wall of the protection sleeve; the inside of end cap is equipped with the rubber buffer, the outer wall of rubber buffer and the inner wall sealing connection of protective sheath, the inner wall sealing connection of rubber buffer and capillary copper pipe's tip.
Preferably, an annular sealing groove is formed in the outer wall of the plug, a sealing ring is arranged in the annular sealing groove, sealing glue is filled between the outer wall of the rubber plug and the inner wall of the protective sleeve, the depth of the annular groove is 2mm, and the wall thickness of the threaded pipe is 3mm.
Preferably, the outer side of the threaded pipe corresponding to the plug is wound with a throat hoop, strip holes are formed in the surface of the throat hoop at intervals, and tail fibers of the fiber bragg gratings sequentially penetrate through the capillary copper pipe, the rubber plug, the plug and the throat hoop and then extend out of the strip holes of the throat hoop.
Preferably, the length of the grating area of the fiber bragg grating is 3mm, the fiber bragg grating inserted into the capillary copper pipe is free of a coating layer, the length of the capillary copper pipe is 26mm, a micropore is formed in the center of the end part of the protective sleeve, a yellow pipe is arranged in the micropore, and the tail fiber of the fiber bragg grating extends out from Huang Guanna.
Preferably, the number of the liquid inlet holes is larger than the number of the liquid outlet holes, the liquid inlet holes and the liquid outlet holes are arranged in a staggered mode, and the diameters of the liquid inlet holes and the liquid outlet holes are 1mm.
Preferably, the inner diameter of the capillary copper tube ranges from 0.126mm to 0.15mm, and the thickness of the protective sleeve is 1mm.
The application relates to a fiber grating fluid temperature measurement structure with an impact protection function, which comprises a threaded pipe, a protection sleeve and a temperature sensor, wherein the protection sleeve is arranged in a through hole of the threaded pipe; through the protective sleeve of design outside trompil, place temperature sensor in the non-impact environment, guaranteed temperature sensor direct contact liquid has avoided the unstable scheduling problem of temperature measurement that the direct impact effect of liquid brought simultaneously. When liquid enters the protective sleeve pipe and flows through the outer side of the capillary copper pipe, the high thermal expansion performance of the capillary copper pipe enables the sensitivity of the temperature sensor to be greatly improved compared with that of the bare fiber grating, and meanwhile the fiber grating is protected from vibration or grating area corrosion caused by direct contact with the liquid.
Drawings
In order to more clearly illustrate the technical solution provided by the present application, the following description will briefly refer to the accompanying drawings. It will be apparent that the figures described below are merely some embodiments of the application.
FIG. 1 is a cross-sectional view of the overall structure of the present application;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of a threaded pipe according to the present application;
FIG. 4 is an isometric view of the overall structure of the present application;
FIG. 5 is a schematic diagram of a plug structure according to the present application;
FIG. 6 is a schematic view of a laryngeal cuff in accordance with the present application;
fig. 7 is a schematic view of the structure of the protective sleeve according to the present application.
1. A laryngeal cuff; 2. a threaded tube; 3. a protective sleeve; 4. a plug; 5. a rubber stopper; 6. capillary copper tube; 7. an optical fiber grating; 8. sealing glue; 9. a seal ring; 10. and tail fiber.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Fiber bragg grating fluid temperature measurement structure with impact protection function
Compared with the existing temperature sensor which is directly inserted into a fluid pipeline or indirectly and non-invasively adopted for temperature acquisition, the application realizes temperature acquisition by replacing the pipeline and assembling the temperature sensor in the replacement pipeline, thereby effectively improving measurement accuracy.
As shown in fig. 1-2, specifically includes: the device comprises a threaded pipe 2, a protective sleeve 3 and a temperature sensor, wherein the temperature sensor is a fiber bragg grating 7 temperature sensor.
Because the conventional fiber bragg grating 7 temperature sensor brings unavoidable measurement errors when being directly impacted by fluid, the temperature sensor is placed in a non-impact environment, and the grating is placed in an environment isolated from the fluid to measure the temperature of the fluid, so that the stability of temperature measurement is ensured.
The specific design is as follows: the two ends of the threaded pipe 2 are provided with threads, the threaded pipe 2 can be assembled in a pipeline system through the threads at the two ends, the middle part of the threaded pipe 2 is radially provided with symmetrical grooves and through holes, the protection sleeve 3 is coaxially arranged in the through holes, one side of the protection sleeve 3 is radially provided with a row of liquid inlet holes, the other side of the protection sleeve 3 is radially provided with a row of liquid outlet holes, the temperature sensor comprises a capillary copper pipe 6 and an optical fiber grating 7, the capillary copper pipe 6 is coaxially arranged in the protection sleeve 3 in a penetrating way, the optical fiber grating 7 is inserted into the capillary copper pipe 6, and a grating area of the optical fiber grating 7 is positioned in the middle part of the capillary copper pipe 6; when the fluid enters the threaded pipe 2 and flows through the protective sleeve 3, part of the fluid flows in from the liquid inlet hole of the protective sleeve 3, flows out from the liquid outlet hole and fills the protective sleeve 3.
The two ends of the threaded pipe 2 are external threads, and can be integrated into a pipeline system in a threaded connection mode with a universal pipe hoop, so that the integrated connection of a temperature measuring structure and the pipeline system is realized, and the threaded pipe 2 and pipelines of any size can be assembled to form the pipeline system by changing the size of the threaded pipe 2, so that the universality of the temperature measuring structure is realized.
Through the design of the protection sleeve 3 with the external opening, the temperature sensor is placed in a non-impact environment, so that the temperature sensor is ensured to be in direct contact with liquid, and meanwhile, the problems of unstable temperature measurement and the like caused by the direct impact of the liquid are avoided.
The copper material has high thermal expansion performance, when liquid enters the protective sleeve 3 and flows to the outer side of the capillary copper pipe 6, the high thermal expansion performance of the capillary copper pipe 6 enables the sensitivity of the temperature sensor to be greatly improved compared with that of the bare fiber grating 7, and meanwhile the fiber grating 7 is protected from vibration or grating area corrosion caused by direct contact with the liquid.
The fiber bragg grating 7 realizes temperature measurement through a grating region positioned in the middle of the capillary copper tube 6, and then realizes real-time transmission of temperature measurement data through the tail fiber 10 until fluid stops flowing at the threaded tube 2. The arrangement of the grating region of the fiber bragg grating 7 in the middle position in the capillary copper tube 6 ensures that the grating region accurately senses the central temperature of the fluid in the capillary copper tube 6.
The whole structure is integrated with a pipeline system to realize a temperature measurement structure with minimized additional mass and small occupied space, and can realize temperature measurement in an aviation pipeline with limited installation.
With reference to fig. 3-5, preferably, an annular groove is formed at a position of the threaded pipe 2 corresponding to the outer side of the through hole, a plug 4 is installed in the annular groove, the outer wall of the plug 4 is in sealing connection with the inner wall of the through hole, and the inner wall of the plug 4 is in sealing connection with the outer wall of the protection sleeve 3; the inside of the plug 4 is provided with a rubber plug 5, the outer wall of the rubber plug 5 is in sealing connection with the inner wall of the protection sleeve 3, and the inner wall of the rubber plug 5 is in sealing connection with the end part of the capillary copper pipe 6.
The plug 4 is used for fixing and sealing the protection sleeve 3 so that the protection sleeve is connected and sealed with the threaded pipe section, and extra weight caused by adding other structures is avoided, so that the guarantee of light weight and miniaturization of the temperature measuring structure is realized. The rubber stopper 5 can realize the seal between protective sheath and the temperature sensor, prevents that the fluid from revealing, and occupation space is little simultaneously, and the rubber stopper 5 adopts anticorrosive material in order to realize anticorrosive function.
Preferably, an annular sealing groove is formed in the outer wall of the plug 4, and a sealing ring 9 is arranged in the annular sealing groove to prevent fluid from flowing out from between the plug 4 and the threaded pipe 2. And a sealant 8 is filled between the outer wall of the rubber plug 5 and the inner wall of the protective sleeve 3, so that fluid is prevented from penetrating into the capillary copper pipe 6 to disturb the temperature sensing of the fiber bragg grating 7. The depth of the annular groove is 2mm, the wall thickness of the threaded pipe 2 is 3mm, and conditions are created for inserting the protection sleeve 3 and installing the plug 4. Both ends of the plug 4 are designed into arc structures consistent with the outer diameter radian of the threaded pipe 2 so as to ensure assembly accuracy, and the plug 4 structure adopts a 3D printing technology to realize customization of structural dimensions.
With reference to fig. 6, preferably, the threaded pipe 2 is wound with a throat hoop 1 corresponding to the outer side of the plug 4, strip holes are spaced on the surface of the throat hoop 1, and the tail fiber 10 of the fiber bragg grating 7 sequentially passes through the capillary copper pipe 6, the rubber plug 5, the plug 4 and the throat hoop 1 and then extends out of the strip holes of the throat hoop 1. The strip hole on the hose clamp 1 ensures that the tail fiber 10 of the fiber bragg grating 7 is normally led out, the stability and the reliability of the installation of the plug 4 are realized by adopting a mode of clamping the threaded pipe 2, and meanwhile, the installation and the disassembly of the plug 4 can be realized by pulling the end part of the hose clamp 1, so that the hose clamp is more convenient.
Preferably, the length of the grating area of the fiber bragg grating 7 is 3mm, and the fiber bragg grating 7 inserted into the capillary copper tube 6 is not coated, so that the temperature sensing precision is ensured. The length of the capillary copper pipe 6 is 26mm, a micropore is arranged in the center of the end part of the protective sleeve 3, a yellow pipe is arranged in the micropore, the tail fiber 10 of the fiber bragg grating 7 extends out of the yellow pipe, and the yellow pipe is used for protecting the tail fiber 10 and avoiding affecting the input and output of signals due to breakage.
With reference to fig. 7, preferably, the number of liquid inlet holes is greater than the number of liquid outlet holes and the liquid inlet holes and the liquid outlet holes are staggered, preferably, the number of liquid inlet holes is 12, the number of liquid outlet holes is 6, and fluid enters the protective sleeve 3 from the liquid inlet holes, so that dynamic pressure is converted into static pressure, and the impact effect of the fluid is greatly reduced. And the multiple holes in and out ensure that the fluid fills the protective sleeve 3 and is fully contacted with the tubular temperature sensor. The diameters of the liquid inlet hole and the liquid outlet hole are 1mm so as to control the flow rate.
Preferably, the inner diameter of the capillary copper tube 6 ranges from 0.126mm to 0.15mm, so that the response rapidity of the temperature sensor is ensured. The thickness of the protective sleeve 3 is 1mm, which ensures the rigidity against fluid impact.
Compared with the prior art, the application has the following advantages and beneficial effects:
1. the temperature measuring structure is integrated in a pipeline system instead of the original pipeline, so that the temperature measuring structure with minimized additional mass is realized, and the temperature measurement in the aviation pipeline with limited installation space can be realized;
2. the temperature sensor is protected by a protective sleeve 3, so that service life attenuation caused by frontal impact of the sensor by fluid in the pipe is prevented;
3. the two sides of the protective sleeve 3 are asymmetrically provided with row holes with different numbers, the porous side is the inlet side of the fluid, the less-hole side is the outlet side of the fluid, the fluid permeates into the protective sleeve 3 from the small holes, the residence time of the fluid in the protective sleeve 3 is prolonged, the fluid is prevented from directly impacting the tubular temperature sensor, and the rapidity, the uniformity and the accuracy of temperature sensing are ensured;
4. the fiber bragg grating 7 is packaged in the capillary copper pipe 6 with high thermal expansion coefficient, so that the temperature sensitivity of the sensor is greatly improved;
5. the designed integrated temperature measuring structure has small size and light weight, so that the additional mass of the pipeline system is greatly reduced, and the integrated temperature measuring structure can be used in a pipeline system with smaller installation space;
6. the designed integrated temperature measuring structure for the fluid pipeline can adapt to pipelines with various diameters, and the threaded installation form avoids additional auxiliary elements necessary for other installation forms.
The last points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;
secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other under the condition of no conflict;
finally: the foregoing description of the preferred embodiments of the application is not intended to limit the application to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (7)
1. The utility model provides a fiber bragg grating fluid temperature measurement structure with impact protection function which characterized in that: comprises a threaded pipe (2), a protective sleeve (3) and a temperature sensor; the two ends of the threaded pipe (2) are provided with threads, the threaded pipe (2) can be assembled in a pipeline system through the threads at the two ends, symmetrical grooves and through holes are formed in the middle of the threaded pipe (2) along the radial direction, the protection sleeve (3) is coaxially arranged in the through holes, one row of liquid inlet holes are formed in one side of the protection sleeve (3) along the radial direction, one row of liquid outlet holes are formed in the other side of the protection sleeve along the radial direction, the temperature sensor comprises a capillary copper pipe (6) and a fiber bragg grating (7), the capillary copper pipe (6) is coaxially arranged in the protection sleeve (3) in a penetrating mode, and the fiber bragg grating (7) is inserted into the capillary copper pipe (6) and a grating region of the fiber bragg grating (7) is located in the middle of the capillary copper pipe (6); when fluid enters the threaded pipe (2) and flows through the protective sleeve (3), part of the fluid flows in from the liquid inlet of the protective sleeve (3), flows out from the liquid outlet and fills the protective sleeve (3).
2. The fiber bragg grating fluid temperature measurement structure with an impact protection function according to claim 1, wherein: an annular groove is formed in the position, corresponding to the outer side of the through hole, of the threaded pipe (2), a plug (4) is installed in the annular groove, the outer wall of the plug (4) is in sealing connection with the inner wall of the through hole, and the inner wall of the plug (4) is in sealing connection with the outer wall of the protection sleeve (3); the inside of end cap (4) is equipped with rubber buffer (5), the outer wall of rubber buffer (5) and the inner wall sealing connection of protective sheath (3), the inner wall of rubber buffer (5) and the tip sealing connection of capillary copper pipe (6).
3. The fiber bragg grating fluid temperature measurement structure with an impact protection function as claimed in claim 2, wherein: the novel sealing device is characterized in that an annular sealing groove is formed in the outer wall of the plug (4), a sealing ring (9) is arranged in the annular sealing groove, sealing glue (8) is filled between the outer wall of the rubber plug (5) and the inner wall of the protective sleeve (3), the depth of the annular groove is 2mm, and the wall thickness of the threaded pipe (2) is 3mm.
4. The fiber bragg grating fluid temperature measurement structure with an impact protection function as claimed in claim 2, wherein: the outside winding that screwed pipe (2) corresponds end cap (4) has throat hoop (1), the interval is equipped with rectangular hole on the surface of throat hoop (1), tail fiber (10) of fiber bragg grating (7) are stretched out from the rectangular hole of throat hoop (1) after passing capillary copper pipe (6), rubber buffer (5), end cap (4) and throat hoop (1) in proper order.
5. The fiber bragg grating fluid temperature measurement structure with an impact protection function according to claim 4, wherein: the length of the grating region of the fiber bragg grating (7) is 3mm, the fiber bragg grating (7) inserted into the capillary copper tube (6) is free of a coating layer, the length of the capillary copper tube (6) is 26mm, a micropore is formed in the center of the end part of the protection sleeve (3), a yellow tube is arranged in the micropore, and a tail fiber (10) of the fiber bragg grating (7) extends out of Huang Guanna.
6. The fiber bragg grating fluid temperature measurement structure with an impact protection function according to claim 1, wherein: the quantity of the liquid inlet holes is greater than that of the liquid outlet holes, the liquid inlet holes and the liquid outlet holes are arranged in a staggered mode, and the diameters of the liquid inlet holes and the liquid outlet holes are 1mm.
7. The fiber bragg grating fluid temperature measurement structure with an impact protection function according to claim 1, wherein: the inner diameter of the capillary copper pipe (6) ranges from 0.126mm to 0.15mm, and the thickness of the protective sleeve (3) is 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311220955.3A CN117191219A (en) | 2023-09-21 | 2023-09-21 | Fiber bragg grating fluid temperature measurement structure with impact protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311220955.3A CN117191219A (en) | 2023-09-21 | 2023-09-21 | Fiber bragg grating fluid temperature measurement structure with impact protection function |
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| Publication Number | Publication Date |
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| CN117191219A true CN117191219A (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311220955.3A Pending CN117191219A (en) | 2023-09-21 | 2023-09-21 | Fiber bragg grating fluid temperature measurement structure with impact protection function |
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| Country | Link |
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| CN (1) | CN117191219A (en) |
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- 2023-09-21 CN CN202311220955.3A patent/CN117191219A/en active Pending
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