CN110907075A - Shearing force detection device based on optical fiber - Google Patents
Shearing force detection device based on optical fiber Download PDFInfo
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- CN110907075A CN110907075A CN201911239666.1A CN201911239666A CN110907075A CN 110907075 A CN110907075 A CN 110907075A CN 201911239666 A CN201911239666 A CN 201911239666A CN 110907075 A CN110907075 A CN 110907075A
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- nano structure
- structure array
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 239000013307 optical fiber Substances 0.000 title claims abstract description 20
- 238000010008 shearing Methods 0.000 title abstract description 33
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 95
- 239000002086 nanomaterial Substances 0.000 claims abstract description 90
- 239000000758 substrate Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 19
- 230000008878 coupling Effects 0.000 abstract description 9
- 238000010168 coupling process Methods 0.000 abstract description 9
- 238000005859 coupling reaction Methods 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000001902 propagating effect Effects 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000012780 transparent material Substances 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
- G01L1/24—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B7/00—Microstructural systems; Auxiliary parts of microstructural devices or systems
- B81B7/04—Networks or arrays of similar microstructural devices
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a shearing force detection device based on an optical fiber, which comprises a substrate layer, wherein a first noble metal micro-nano structure array is arranged above the substrate layer, a transparent elastic layer is arranged above the first noble metal micro-nano structure array, a second noble metal micro-nano structure array is arranged above the transparent elastic layer, and a fiber core is arranged above the second noble metal micro-nano structure array; this shearing force detection device based on optic fibre can convert the shearing force to the object that awaits measuring into optical signal, through the change that detects the transmission coefficient in the fibre core to judge the change of coupling intensity, judge the shearing force that the object that awaits measuring received, realize the detection of shearing force, this shearing force detection device based on optic fibre has simple structure, interference killing feature is strong, sensitivity is high, the advantage that the accuracy is high.
Description
Technical Field
The invention belongs to the technical field of shear force detection, and particularly relates to a shear force detection device based on an optical fiber.
Background
"shear" is the relative dislocation and deformation of the cross section of a material along the direction of a pair of closely spaced, equally sized, oppositely directed lateral forces (i.e., forces normal to the plane of action). Forces that can cause shear deformation of a material are referred to as shear forces or shear forces. The cross section where shear deformation occurs is called the shear plane. The key to determining whether to "shear" is whether the cross-section of the material is relatively dislocated. Therefore, the phenomenon of cutting vegetables by a kitchen knife is not the cutting phenomenon (the relative dislocation of the cross section of the vegetables does not occur), but the phenomenon of cutting nails by scissors is the cutting phenomenon (the relative dislocation of the cross section of the nails occurs; note: the phenomenon of cutting nails by the scissors by the nails is not the cutting phenomenon, although the phenomenon of cutting nails by the scissors can also be achieved.
In the prior art, a mechanical structure is generally used for measuring the shearing force, the mechanical structure is limited by the inherent characteristics of the mechanical structure, the precision is difficult to improve when the shearing force is detected, and the measuring sensitivity is also greatly influenced.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a shearing force detection device based on an optical fiber, which comprises a substrate layer, wherein a first noble metal micro-nano structure array is arranged above the substrate layer, a transparent elastic layer is arranged above the first noble metal micro-nano structure array, a second noble metal micro-nano structure array is arranged above the transparent elastic layer, and a fiber core is arranged above the second noble metal micro-nano structure array.
The first noble metal micro-nano structure array and the second noble metal micro-nano structure array are different in height.
The noble metal micro-nano structure of the first noble metal micro-nano structure array is hemispherical with a sphere center on the upper surface of the substrate layer.
The noble metal micro-nano structure of the first noble metal micro-nano structure array is a chiral structure.
The noble metal micro-nano structure of the first noble metal micro-nano structure array is an L-shaped chiral structure.
The noble metal micro-nano structure of the first noble metal micro-nano structure array is a U-shaped chiral structure.
The noble metal micro-nano structure of the second noble metal micro-nano structure array is a right-angle trapezoid structure.
The substrate layer is made of silicon or silicon dioxide.
The transparent elastic layer is made of polymethyl methacrylate.
The invention has the beneficial effects that: the shearing force detection device based on the optical fiber provided by the invention can convert the shearing force of an object to be detected into an optical signal, judge the change of the coupling strength by detecting the change of the transmission coefficient in the fiber core, judge the shearing force applied to the object to be detected and realize the detection of the shearing force.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a first schematic diagram of a fiber-based shear force detection device.
FIG. 2 is a schematic diagram of a second configuration of the optical fiber-based shear force detection device.
FIG. 3 is a third schematic structural diagram of an optical fiber-based shear force detection device.
Fig. 4 is a first structural schematic diagram of a noble metal micro-nano structure of the first noble metal micro-nano structure array.
Fig. 5 is a second structural schematic diagram of the noble metal micro-nano structure of the first noble metal micro-nano structure array.
Fig. 6 is a noble metal micro-nano structure of a second noble metal micro-nano structure array.
In the figure: 1. a substrate layer; 2. a first noble metal micro-nano structure array; 3. a transparent elastic layer; 4. a second noble metal micro-nano structure array; 5. a core.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Example 1
The embodiment provides a shearing force detection device based on optical fiber as shown in figure 1, including substrate layer 1, substrate layer 1 mainly plays a supporting role, and substrate layer 1 requires that hardness is high, stability is strong, and preparation material commonly used is silicon or silica etc., substrate layer 1's top is provided with first noble metal and receives structure array 2 a little, first noble metal receives structure array 2 a little top and is provided with transparent elastic layer 3 a little, transparent elastic layer 3's top is provided with second noble metal and receives structure array 4 a little, second noble metal receives structure array 4 a little top and is provided with fibre core 5 a little.
In practical application, the substrate layer 1 is placed on the surface of an object to be measured and fixed, the fiber core 5 is fixed with another object applying external force, namely, the substrate layer 1 is fixedly connected with the object to be measured, the fiber core 5 is fixedly connected with a shearing force applying source, and incident light with known characteristics is transmitted in the fiber core 5; since the coupling strength between the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4 depends on the distance between the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4, under the action of an external shearing force, the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4 can generate phase shift, so that the distance between the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4 is changed, the plasmon coupling strength on the surface between the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4 is changed, the transmission coefficient of incident light propagating in the fiber core 5 can be influenced, and the change of the plasmon coupling strength on the surface between the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4 can be obtained through the change of the transmission coefficient of the incident light propagating in the fiber core 5 Thus, the detection of the shearing force can be realized. The shearing force detection device based on the optical fiber has the advantages of simple structure, strong anti-interference capability, high sensitivity and high accuracy. In addition, the transparent elastic layer 3 is made of polymethyl methacrylate, and may also be made of other materials with high light transmittance and strong elasticity, such as transparent rubber. Transparent elastic layer 3 that different materials made, under receiving same shearing force effect, deformation is also different, consequently, can be according to the size of the shearing force that will detect, selects different transparent material to prepare transparent elastic layer 3, like this, can be so that the scope of the shearing force that measures is wider, and measuring precision is higher.
Further, as shown in fig. 2, the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4 have different heights, but the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4 have the same length, so that the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4 can generate obviously separated binding and anti-binding modes, and the magnitude of the shearing force can be detected by detecting two resonance wavelengths in total, wherein the two resonance wavelengths are different from the resonance wavelengths of the light with known characteristics and the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4, which are transmitted in the fiber core 5.
Further, as shown in fig. 3, the noble metal micro-nano structure of the first noble metal micro-nano structure array 2 is a hemisphere whose spherical center is on the upper surface of the substrate layer 1. When the second noble metal micro-nano structure array 4 is displaced above the first noble metal micro-nano structure array 2, the horizontal distance between the second noble metal micro-nano structure array 4 and the first noble metal micro-nano structure array 2 can be changed due to the applied shearing force, and because the noble metal micro-nano structure of the first noble metal micro-nano structure array 2 has the protruding structure, the horizontal distance between the second noble metal micro-nano structure array 4 and the first noble metal micro-nano structure array 2 can be changed more obviously, and the coupling strength can be changed more obviously, so that the change of the transmission spectrum in the fiber core 5 is more obvious, the resonance wavelength is changed, the transmission coefficient at the resonance wavelength is also changed obviously, and the detection precision is improved.
Further, the noble metal micro-nano structure of the first noble metal micro-nano structure array 2 is a chiral structure. As shown in fig. 5, the noble metal micro-nano structure of the first noble metal micro-nano structure array 2 is an L-shaped chiral structure, and the L-shaped chiral structure has two arms with different lengths or two arms with different widths; as shown in fig. 4, the noble metal micro-nano structure of the first noble metal micro-nano structure array 2 is a U-shaped chiral structure, and the U-shaped chiral structure may have two arms with different lengths or two arms with different widths. The first noble metal micro-nano structure array 2 can generate surface plasmons which vibrate along the vertical direction, and the coupling generated by the surface plasmons and the second noble metal micro-nano structure array 4 depends on the horizontal distance between the surface plasmons and the second noble metal micro-nano structure array, so that the detection sensitivity is higher, and the sensitivity of the shearing force detection device based on the optical fiber is improved.
Further, as shown in fig. 6, the noble metal micro-nano structure of the second noble metal micro-nano structure array 4 is a right-angle trapezoid structure, and a right-angled inclined surface is in contact with the fiber core 5, when the right-angled inclined surface is subjected to a shearing force, the area of the right cross section is large, and the area of the left cross section is small, so that when the shearing force drives the second noble metal micro-nano structure array 4 to generate a unique horizontal level, not only is the coupling strength between the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4 changed, but also the right cross section of the second noble metal micro-nano structure array 4 is large, a larger force is applied to the transparent elastic layer 3, the transparent elastic layer 3 is deformed more, and the detection precision is improved.
Further, the core 5 may be a core having a circular cross section, or may be a core having an elliptical or rectangular parallelepiped cross section.
Further, the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4 can be both made of noble metals such as gold or silver, and the diameters of the noble metal micro-nano structures of the first noble metal micro-nano structure array 2 and the second noble metal micro-nano structure array 4 are circular with the diameter of 20 nm-100 nm or other shapes with the same size.
In conclusion, this shearing force detection device based on optic fibre can convert the shearing force to the object that awaits measuring into optical signal, through the change that detects the transmission coefficient in the fibre core 5 to judge the change of coupling intensity, judge the shearing force that the object that awaits measuring received, realize the detection of shearing force, this shearing force detection device based on optic fibre has simple structure, interference killing feature is strong, sensitivity is high, advantage that the accuracy is high.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. An optical fiber-based shear force detection device, characterized in that: the high-strength high-.
2. An optical fiber-based shear force detection device according to claim 1, wherein: the first noble metal micro-nano structure array (2) and the second noble metal micro-nano structure array (4) are different in height.
3. An optical fiber-based shear force detection device according to claim 1, wherein: the noble metal micro-nano structure of the first noble metal micro-nano structure array (2) is hemispherical with a sphere center on the upper surface of the substrate layer (1).
4. An optical fiber-based shear force detection device according to claim 1, wherein: the noble metal micro-nano structure of the first noble metal micro-nano structure array (2) is a chiral structure.
5. An optical fiber-based shear force detection device according to claim 4, wherein: the noble metal micro-nano structure of the first noble metal micro-nano structure array (2) is an L-shaped chiral structure.
6. An optical fiber-based shear force detection device according to claim 4, wherein: the noble metal micro-nano structure of the first noble metal micro-nano structure array (2) is a U-shaped chiral structure.
7. An optical fiber-based shear force detection device according to claim 1, wherein: the noble metal micro-nano structure of the second noble metal micro-nano structure array (4) is a right-angle trapezoid structure.
8. An optical fiber-based shear force detection device according to claim 1, wherein: the substrate layer (1) is made of silicon or silicon dioxide.
9. An optical fiber-based shear force detection device according to claim 1, wherein: the transparent elastic layer (3) is made of polymethyl methacrylate.
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| CN201911239666.1A CN110907075B (en) | 2019-12-06 | 2019-12-06 | Shearing force detection device based on optical fiber |
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| CN201911239666.1A CN110907075B (en) | 2019-12-06 | 2019-12-06 | Shearing force detection device based on optical fiber |
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