CN115127707A - Pre-tensioning sensing wires using a resilient means, methods of making and using sensors - Google Patents
Pre-tensioning sensing wires using a resilient means, methods of making and using sensors Download PDFInfo
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- CN115127707A CN115127707A CN202210202132.7A CN202210202132A CN115127707A CN 115127707 A CN115127707 A CN 115127707A CN 202210202132 A CN202210202132 A CN 202210202132A CN 115127707 A CN115127707 A CN 115127707A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 239000013307 optical fiber Substances 0.000 claims description 38
- 230000008859 change Effects 0.000 claims description 21
- 239000000835 fiber Substances 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 14
- 239000003292 glue Substances 0.000 claims description 11
- 238000005259 measurement Methods 0.000 description 7
- 102100026080 F-box only protein 44 Human genes 0.000 description 6
- 101000913298 Homo sapiens F-box only protein 44 Proteins 0.000 description 6
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- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
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- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- 230000000737 periodic effect Effects 0.000 description 1
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- 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
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
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- 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
- G01L1/246—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 using integrated gratings, e.g. Bragg gratings
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Abstract
The invention provides a method for manufacturing a sensor, the sensor and a sensing method using the sensor, wherein the sensor comprises a rebound device, a flexible sensing line, a fixed end and a stressed end, and the method for manufacturing the sensor comprises the following steps: the flexible sensing line is arranged by penetrating through the fixed end, the rebounding device and the stressed end, wherein the rebounding device is arranged between the fixed end and the stressed end; applying a predetermined force to the force-bearing end to compress the rebounding device, and fixing two ends of the flexible sensing line and two ends of the rebounding device to the fixed end and the force-bearing end respectively; and releasing the fixed rebounding device to pretension the flexible sensing wire.
Description
Technical Field
The present invention relates to a sensor for measuring compressive strain, a method for manufacturing the same, and a sensing method using the same, and more particularly, to a sensor for measuring compressive strain having a resilient device and a pre-tensioned flexible sensing wire, a method for manufacturing the same, and a sensing method using the same.
Background
Flexible sensing wires, such as optical fibers or wires, are sometimes used as cores in measurement devices. Taking an optical fiber grating (FBG) as an example, the most important function is to measure the strain that the FBG is subjected to. Fig. 1 is a schematic diagram of FBG reflection principle. In fig. 1, when continuous broadband light (incident light) is coupled into the optical fiber (which includes the optical fiber core and the FBG), the optical fiber passes through the FBG (transmitted light) except for light waves of a specific wavelength satisfying the Bragg condition (reflected light). Using FBGs for other physical quantity measurements often requires the use of mechanical means to convert the desired measured physical quantity, such as force, pressure or displacement, into strain, and then using FBGs to sense the strain. The strain sensed by the FBG at this time may be a tensile strain or a compressive strain. FBGs are made of thin optical fibers and therefore only sense tensile strain, while compressive strain only causes bending of the optical fibers and thus cannot be sensed correctly. To perform the function of the compressive strain measurement, a method of pre-tensioning the FBG while fixing the FBG to the mechanical member substrate is generally used. The pre-tensioning causes the compressive strain experienced by the FBG to be reflected in a decrease in tensile strain. When the optical fiber is fixed on the stressed end and the fixed end of the base material of the mechanical component by the fixing glue or fixed by other methods, the application of pretension usually increases the complexity of the mechanism design, reduces the stability of the product and easily damages the FBG.
The above problems can also occur when strain measurements are made, for example, using fiber Brillouin scattering (Brillouin scattering) or using wire resistance.
Using FBG as an example for explanation, in order to realize the function of measuring the compressive strain, a commonly used method is to pre-tension the FBG while fixing the FBG on the substrate, so that the compressive strain applied to the FBG after fixing is reflected in the reduction of the tensile strain. Fig. 2 shows a schematic diagram of a sensor for measuring compressive strain manufactured using the prior art. As shown in fig. 2, the sensor includes an optical fiber having FBGs, a spring plate and a metal housing, both ends of the optical fiber being fixed to a fixing end and a force receiving end with fixing glue. The FBG and a part of the optical fiber are positioned in the metal shell, the fixed end and the stress end to form a closed space, and the spring piece is arranged at the stress end and used for sensing the compressive strain. When the external pressure of the sensor becomes large, the FBG is in compressive strain. If the FBG is not pre-tensioned when the sensor is manufactured, this compressive strain will cause the FBG to bend and lose its sensitivity. For the reasons described above, it is common to manufacture FBG sensors with a pretension corresponding to 2000pm or close to 2000 pm.
An increase of 13.4pm per 1g of tension applied to the fiber can be achieved, depending on the elastic parameters of the single mode fiber. Therefore, to increase 2000pm requires maintaining the FBG tension 150g after fixing. However, the fixing glue used to fix the FBG usually needs to be heated to achieve the desired fixation. Because of the effects of thermal expansion and contraction of the optical fiber and the base material of the mechanical member, the amount of pre-tension applied during the fixing of the optical fiber is always maintained at more than twice the tension required for pre-tension when the sensor is returned to room temperature after the fixing. The amount of pretensioning force actually required is influenced by the design and material of the base material of the mechanical member and even the experience of the manufacturing personnel. Excessive pretension force may cause the FBG to break during the fixing process or reduce the life of the FBG sensor, reducing the stability of the product. The pre-tensioning is insufficient, and after the fixing is completed and the temperature is reduced to room temperature, the FBG may not reflect the compressive strain. To avoid the pretensioning force problem, more complicated mechanism designs are sometimes used, which increases the manufacturing costs.
Therefore, the inventor considers the idea of the improved invention in view of the deficiency of the prior art, and finally invents the invention of "pretensioning the sensing wire using a rebounding device, the manufacturing thereof, and the method for sensing".
Disclosure of Invention
The primary object of the present invention is to provide a method of pretensioning a flexible sensing wire using a resilient means, such as a spring (coil) or spring leaf, that is pulled over the flexible sensing wire. When the two ends of the flexible sensing line and the two ends of the rebounding device are respectively fixed at the fixed end and the stressed end, the rebounding device is compressed firstly, so that the flexible sensing line is fixed at the fixed end and the stressed end of the base material of the mechanical component of the sensor by using fixing glue or other methods under the condition of no stress or small pulling force. After the fixing is finished, the rebounding device is released, and the flexible sensing line is pre-tensioned by the rebounding force of the rebounding device. The sensor of the present invention avoids or reduces the negative manufacturing effects of many sensors having compressive strain in the flexible sensing line.
It is yet another primary object of the present invention to provide a method of manufacturing a sensor, wherein the sensor includes a rebounding device, a flexible sensing line, a fixed end, and a force-bearing end, the method including: the flexible sensing line is arranged by penetrating through the fixed end, the rebounding device and the stressed end, wherein the rebounding device is arranged between the fixed end and the stressed end; applying a predetermined force to the force bearing end to compress the rebounding device, and fixing two ends of the flexible sensing line and two ends of the rebounding device to the fixed end and the force bearing end respectively; and releasing the fixed rebounding device to pretension the flexible sensing wire.
Another main object of the present invention is to provide a sensor, comprising: a fixed end; a force-bearing end; the rebounding device is arranged between the fixed end and the stressed end and is compressed until the rebounding device is fixed on the fixed end and the stressed end and then is released; and a sensing line passing through and arranged between the fixed end and the stressed end and having a first end and a second end respectively fixed to the fixed end and the stressed end, an intermediate sensing section and a sensing parameter, wherein the sensing line is pre-tensioned by the fixed and relaxed rebounding device with a predetermined force F1, the sensing parameter changes in response to the actual stress of the intermediate sensing section or the stressed end, the surface stress of the stressed end is obtained according to the change F2, and the actual stress is F1-F2.
Drawings
Fig. 1 is a schematic diagram illustrating the principle of FBG reflection.
Fig. 2 is a schematic view showing a sensor for measuring compressive strain manufactured using the prior art.
Fig. 3 is a schematic diagram illustrating a sensor according to a preferred embodiment contemplated by the present invention.
Detailed Description
The flexible sensing lines described above may include optical fibers and wires. The number of sensing methods with optical fiber as the core is rapidly increasing. The optical fiber is of a cylindrical elongated wire structure, and a common single-mode optical fiber is composed of an inner layer with a diameter of 125 μm, a core (core) made of silicon and an outer layer coated with acryl, and the whole outer diameter is 250 μm. Typically, the fiber will be subjected to a tensile strain of 10,000 μ ε. Two fiber optic sensing methods are briefly described below: fiber gratings and brillouin scattering.
The fiber grating is fabricated by exposing a 1-20mm length of fiber to high energy laser light, which causes a periodic, permanent change in the refractive index of the fiber. This section of Fiber with a period of refractive index variation Λ is called Fiber Grating (FBG). When the FBG is subjected to external force or temperature change, strain (epsilon) is generated B ) The grating period Λ changes with it, causing the wavelength of the FBG reflected light wave to change. Whereas the FBG reflects the original center (peak) wavelength λ of the light wave B Change amount of (Δ λ) B And epsilon B The relationship of (c) is as follows:
Δλ B ＝0.74λ B ε B or
Commonly used FBG with λ B The wavelength range is 1525-1575 nm, and the wavelength variation which can be identified by the FBG reading system is about 1pm (1000 pm at 1 nm). According to the formula (1), when FBG is used for strain measurement, the corresponding delta lambda of each 1pm B Slightly lower than 10 -6 Strain (μ ∈), making FBGs stable and sensitive strain gauges.
The measurement principle of Brillouin scattering (Brillouin scattering) is to use the fact that when an optical fiber is strained, light passing through this point produces Brillouin scattering, and the frequency of this Brillouin scattering light is linear with the amount of strain. When the pulse light is coupled into the optical fiber and meets a strain generating point, Brillouin scattering is generated, and the time delta t from the emission of the scattered light to the transmission of the scattered light to the pulse light source point and the frequency of the transmitted scattered light are recorded. Light speed of 3X 10 8 m/s, so the distance of the point of occurrence of the strain event from the pulsed light source is 0.5 Δ t × speed of light. The amount of strain is determined based on the frequency of the scattered light. The technique has the advantages that the strain occurring at any position on the optical fiber can be sensed, the accuracy of identifying the strain occurring position can be within 10cm, and the resolution of strain sensing is more than 10 mu epsilon。
The metal wire produces strain after being pulled by tension, the cross-sectional area is reduced under the influence of the P-pine ratio, and the resistance is increased. Therefore, the resistance change of the sensing wire can be used to identify the strain.
Thus, it is an essential and important function to measure the strain experienced by the flexible sensing wire. Using a flexible sensing wire for other physical quantity measurements often requires the use of mechanical means to convert the desired measured physical quantity, such as force, pressure or displacement, into strain, and then using the flexible sensing wire to sense the strain. The strain sensed by the flexible sensing line at this time may be a tensile strain or a compressive strain. The flexible sensing lines can only sense tensile strain, while compressive strain can only cause the flexible sensing lines (e.g., optical fibers) to bend and fail to sense correctly.
The invention uses a rebounding device to apply pretension after fixation is completed. When the FBG is fixed, the rebound device is compressed, and the FBG is fixed on the base material of the mechanical component by using fixing glue or other methods under the condition of no stress or small stress. After the fixing is finished, the mechanical component for fixing the rebound device is released, and the FBG is pre-tensioned by using the rebound force.
Fig. 3 is a diagram illustrating a sensor according to a preferred embodiment contemplated by the present invention. In fig. 3, the sensor 7 includes: the flexible sensing line comprises a fixed end 1, a stress end 2, a flexible sensing line 4 with a fiber bragg grating 3(FBG) or a strain generating point 3, a rebounding device 6 and a spring, wherein two ends of the flexible sensing line 4 penetrate through and are arranged between the fixed end 1 and the stress end 2, the rebounding device 6 is arranged between the fixed end 1 and the stress end 2, and the flexible sensing line 4 is compressed until two ends of the flexible sensing line 4 and two ends of the rebounding device 6 are fixed on the fixed end 1 and the stress end 2 by fixing glue 5 and then are loosened so as to pre-tension the flexible sensing line 4 (which can be an optical fiber 4 or a metal wire 4).
The present invention proposes a method of manufacturing a sensor using a resilient means to pretension a flexible sensing wire-taking an FBG manometer as an example. As shown in fig. 3, when this method is performed:
a method of manufacturing a sensor using a debounce device to pretension a flexible sense wire, comprising:
1. the length and stiffness (spring rate) of the bouncing means 6 (e.g. spring 6) are chosen such that after the FBG3 is fixed, the bounce force generated by the bouncing means 6 between the fixed end 1 and the stressed end 2 is equal to the pulling force required to pre-tension the FBG 3.
2. The FBG3 is threaded with the optical fiber 4 inside the rebounding device 6.
3. When fixing the FBG3, the rebounding device 6 is compressed first, so that the FBG3 can use a heating or room temperature method without additional tension except for straightening the FBG3, and the two ends of the rebounding device and the two ends of the FBG can be fixed on the fixed end 1 and the stressed end 2 by the fixing glue 5 or other methods.
4. After the fixing is completed the rebound device 6 is released and the FBG3 is pre-tensioned with its rebound force.
The invention provides a method for manufacturing a sensor 7, wherein the sensor 7 comprises a rebounding device 6, a flexible sensing line 4, a fixed end 1 and a force bearing end 2, and the method comprises the following steps: the flexible sensing line 4 is arranged by passing through the fixed end 1, the rebounding device 6 and the stressed end 2, wherein the rebounding device 6 is arranged between the fixed end 1 and the stressed end 2; applying a predetermined force to the force-bearing end 2 to compress the elastic device 6, and fixing two ends of the flexible sensing line 4 and two ends of the elastic device 6 to the fixed end 1 and the force-bearing end 2 respectively; and releasing the fixed rebounding device 6 so that it pretensions the flexible sensing wire 4 (see fig. 3).
The method for manufacturing the sensor 7 as described above, wherein the flexible sensing line 4 is an optical fiber 4 or a metal wire 4, the two ends of the flexible sensing line 4 and the two ends of the rebounding device 6 are respectively fixed to the fixed end 1 and the stressed end 2 by using fixing glue 5, and the rebounding device 6 is a spring 6 or a spring plate 6.
The present invention also provides a sensor 7, the sensor 7 comprising: a fixed end 1; a stress end 2; the rebounding device 6 is arranged between the fixed end 1 and the stressed end 2, and is compressed until the rebounding device 6 is fixed on the fixed end 1 and the stressed end 2 and then is released; and a sensing line 4, which passes through and is arranged between the fixed end 1 and the stressed end 2, and has a first end and a second end respectively fixed on the fixed end 1 and the stressed end 2, an intermediate sensing section 4 (which is the sensing line 4 positioned between the fixed end 1 and the stressed end 2), and a sensing parameter, wherein the sensing line 4 is pre-tensioned by the fixed and relaxed rebounding device 6 with a predetermined force F1, the sensing parameter changes due to the actual force applied to the intermediate sensing section 4 or the stressed end 2, the surface force F2 of the stressed end 2 is obtained according to the change, and the actual force is F1-F2 (see fig. 3).
The sensor 7 is used for sensing the pressure strain, the sensing line 4 is a flexible sensing line 4, the flexible sensing line 4 is an optical fiber 4 or a metal wire 4, and the rebounding device 6 is a spring 6 or a spring piece 6. The flexible sensing line 4 is arranged through the fixed end 1, the rebounding device 6 and the stressed end 2. When the flexible sensing line 4 is an optical fiber 4, the optical fiber 4 includes an optical fiber grating (FBG)3 or a strain generation point 3 between the fixed end 1 and the stressed end 2, so that the sensor 7 senses the wavelength change of the optical fiber grating 3 or the return time of the brillouin scattering scattered light and the scattered light emitted by the strain generation point 3 to calculate the magnitude of the compressive strain borne by the sensing device 7; and when the flexible sensing line 4 is the metal wire 4, the sensor 7 senses the resistance change of the metal wire 4 to calculate the magnitude of the compressive strain, and the compressive strain is the actual stress.
The present invention also provides a sensing method using the sensor 7 described above, including: subjecting the force-bearing end 2 to the actual force; and measuring the existing tensile strain of the sensing wire 4 to obtain an increase of the existing tensile strain compared with the rated tensile strain of the pre-tensioned sensing wire 4, wherein the increase is the magnitude of the actual stress (see fig. 3).
The sensing method as described above, wherein when the sensing line 4 is an optical fiber 4, the optical fiber 4 includes a Fiber Bragg Grating (FBG)3 or a strain generating point 3 between the fixed end 1 and the stressed end 2, and the sensing method further includes sensing a wavelength change of the fiber bragg grating 3 or a scattered light frequency and a scattered light returning time of brillouin scattering emitted by the strain generating point 3 to calculate the magnitude of the actual stress.
The sensing method as described above, wherein when the sensing line 4 is a wire 4, the sensing method further comprises sensing a resistance change of the wire 4 to calculate the magnitude of the actual force.
The sensing method as described above, wherein when the wire is pre-tensioned, due to the tensile strain generated after being subjected to tension, the cross-sectional area of the wire 4 is reduced under the influence of the pinto ratio, so as to increase the resistance of the wire 4, and when the wire 4 is subjected to an actual tension, the cross-sectional area is relatively reduced due to the tensile strain generated by the tension, so as to relatively increase the resistance value, and the change in the resistance value is used to calculate the magnitude of the actual stress.
The sensing method as described above, wherein the sensing line 4 is a flexible sensing line 4, and the actual force is a compressive strain. At this time, the resistance value of the metal wire 4 is relatively reduced, and the change of the resistance value is used for calculating the actual stress.
In summary, the present invention provides a sensor using a resilient device (such as a spring (coil) or a spring leaf (spring leaf) sleeved outside a flexible sensing line to apply a pre-tensioned compressive strain to the flexible sensing line, wherein when two ends of the flexible sensing line and two ends of the resilient device are fixed to a fixed end and a stressed end, respectively, the resilient device is compressed, so that the flexible sensing line is fixed to the fixed end and the stressed end of a substrate of a mechanical component of the sensor by using a fixing glue or other methods without stress or slight tension.
Therefore, although the present application has been described in detail with reference to the above embodiments, it should not be construed as limiting the scope of the present application, and it is understood that variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the present application.
Description of the reference numerals
1: fixed end
2: stress end
3: fiber grating/FBG/strain generating point
4: sensing line/flexible sensing line/optical fiber/wire
5: fixing glue
6: rebounding device/spring leaf/intermediate sensing section
7: sensor according to a preferred embodiment of the invention
Claims (10)
1. A method of manufacturing a sensor, wherein the sensor comprises a rebounding device, a flexible sense line, a fixed end, and a force-bearing end, the method comprising:
the flexible sensing line is arranged by penetrating through the fixed end, the rebounding device and the stressed end, wherein the rebounding device is arranged between the fixed end and the stressed end;
applying a predetermined force to the force-bearing end to compress the rebounding device, and fixing two ends of the flexible sensing line and two ends of the rebounding device to the fixed end and the force-bearing end respectively; and
releasing the fixed rebounding device to pretension the flexible sensing line.
2. The method of claim 1, wherein the two ends of the flexible sensing wire and the two ends of the rebounding device are fixed to the fixed end and the stressed end, respectively, using a fixing glue, and the flexible sensing wire is an optical fiber or a metal wire.
3. The method of claim 1, wherein the rebounding device is a spring or leaf spring.
4. A sensor, comprising:
a fixed end;
a force-bearing end;
the rebounding device is arranged between the fixed end and the stressed end and is compressed until the flexible sensing line is loosened after being fixed at the fixed end and the stressed end; and
and the sensing line penetrates through and is arranged between the fixed end and the stressed end, and is provided with a first end and a second end which are respectively fixed on the fixed end and the stressed end, an intermediate sensing section and sensing parameters, wherein the sensing line is pre-tensioned by the relaxed rebounding device with the preset force F1, the sensing parameters change by responding to the actual stress of the intermediate sensing section or the stressed end, the stress F2 of the stressed end is obtained according to the change, and the actual stress is F1-F2.
5. The sensor of claim 4, wherein the sensor is for sensing a pressure strain, the sensing line is a flexible sensing line, the flexible sensing line is an optical fiber or a wire, the rebounding device is a spring or a leaf spring, the flexible sensing line is disposed through the fixed end, the rebounding device, and the force bearing end; when the flexible sensing line is the optical fiber, the optical fiber comprises a fiber grating or a strain generation point between the fixed end and the stressed end, so that the sensor senses the wavelength change of the fiber grating or the frequency of the scattered light of Brillouin scattering emitted by the strain generation point, and the magnitude of the compressive strain borne by the sensing device is calculated; and when the flexible sensing line is the metal wire, the sensor senses the resistance change of the metal wire so as to calculate the magnitude of the compressive strain, and the compressive strain is the actual stress.
6. A sensing method using the sensor of claim 4, comprising:
enabling the stress end to bear the actual stress; and
and measuring the existing tensile strain of the sensing wire to obtain the increment of the existing tensile strain of the sensing wire compared with the rated tensile strain of the pre-tensioned sensing wire, wherein the increment is the magnitude of the actual stress.
7. The sensing method as claimed in claim 6, wherein when the sensing line is an optical fiber, the optical fiber includes a fiber grating or a strain generating point between the fixed end and the stressed end, the sensing method further includes sensing a wavelength change of the fiber grating or a frequency of a scattered light of Brillouin scattering emitted from the strain generating point to calculate the magnitude of the actual stress.
8. The sensing method of claim 6, wherein when the sensing line is a wire, the sensing method further comprises sensing a change in resistance of the wire to calculate the magnitude of the actual force.
9. The sensing method as claimed in claim 8, wherein when the wire is pre-tensioned, due to the tensile strain generated after being subjected to tension, the cross-sectional area of the wire is reduced under the influence of the pinto ratio, so that the resistance of the wire is increased, and when the wire is subjected to an actual tension, the cross-sectional area is relatively reduced due to the tensile strain generated by the tension, so that the resistance value is relatively increased, and the change of the resistance value is used to calculate the magnitude of the actual stress.
10. The sensing method of claim 6, wherein the metal sense line is a flexible sense line and the actual force is a compressive strain. At the moment, the resistance value of the metal wire is relatively reduced, and the change of the resistance value is used for calculating the actual stress.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW110110700 | 2021-03-24 | ||
| TW110110700A TW202238088A (en) | 2021-03-24 | 2021-03-24 | Sensor with sensing line pretensioned using rebound device and manufacturing and use methods thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115127707A true CN115127707A (en) | 2022-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210202132.7A Pending CN115127707A (en) | 2021-03-24 | 2022-03-03 | Pre-tensioning sensing wires using a resilient means, methods of making and using sensors |
Country Status (2)
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| TW (1) | TW202238088A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3958455A (en) * | 1973-09-21 | 1976-05-25 | Russell John D | Force transducer for strain gage |
| US4350046A (en) * | 1979-11-15 | 1982-09-21 | International Standard Electric Corporation | Cable strain monitoring |
| CN103983384A (en) * | 2013-02-08 | 2014-08-13 | 同方威视技术股份有限公司 | Fiber bragg grating tension sensor |
| US20150338286A1 (en) * | 2012-03-07 | 2015-11-26 | Ofs Fitel, Llc | Grating-based sensor |
| CN106030269A (en) * | 2013-11-19 | 2016-10-12 | 辉固技术有限公司 | Sensor for detecting pressure waves in a fluid, provided with static pressure compensation |
| CN107421666A (en) * | 2017-06-21 | 2017-12-01 | 沈阳建筑大学 | A kind of arcuately fiber bragg grating pressure sensor |
| CN111812290A (en) * | 2020-07-17 | 2020-10-23 | 山东建筑大学 | Water pollution monitoring biosensor, monitoring system and monitoring method |
| CN112461417A (en) * | 2020-10-29 | 2021-03-09 | 江苏法尔胜光电科技有限公司 | Mounting structure of fiber grating cable force sensor |
-
2021
- 2021-03-24 TW TW110110700A patent/TW202238088A/en unknown
-
2022
- 2022-03-03 CN CN202210202132.7A patent/CN115127707A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3958455A (en) * | 1973-09-21 | 1976-05-25 | Russell John D | Force transducer for strain gage |
| US4350046A (en) * | 1979-11-15 | 1982-09-21 | International Standard Electric Corporation | Cable strain monitoring |
| US20150338286A1 (en) * | 2012-03-07 | 2015-11-26 | Ofs Fitel, Llc | Grating-based sensor |
| CN103983384A (en) * | 2013-02-08 | 2014-08-13 | 同方威视技术股份有限公司 | Fiber bragg grating tension sensor |
| CN106030269A (en) * | 2013-11-19 | 2016-10-12 | 辉固技术有限公司 | Sensor for detecting pressure waves in a fluid, provided with static pressure compensation |
| CN107421666A (en) * | 2017-06-21 | 2017-12-01 | 沈阳建筑大学 | A kind of arcuately fiber bragg grating pressure sensor |
| CN111812290A (en) * | 2020-07-17 | 2020-10-23 | 山东建筑大学 | Water pollution monitoring biosensor, monitoring system and monitoring method |
| CN112461417A (en) * | 2020-10-29 | 2021-03-09 | 江苏法尔胜光电科技有限公司 | Mounting structure of fiber grating cable force sensor |
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| TW202238088A (en) | 2022-10-01 |
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