CN117647319A - Temperature sensing device suitable for under hypergravity centrifugation environment - Google Patents
Temperature sensing device suitable for under hypergravity centrifugation environment Download PDFInfo
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- CN117647319A CN117647319A CN202311677740.4A CN202311677740A CN117647319A CN 117647319 A CN117647319 A CN 117647319A CN 202311677740 A CN202311677740 A CN 202311677740A CN 117647319 A CN117647319 A CN 117647319A
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- 238000005119 centrifugation Methods 0.000 title claims description 3
- 239000004038 photonic crystal Substances 0.000 claims abstract description 74
- 239000000463 material Substances 0.000 claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 230000000007 visual effect Effects 0.000 claims abstract description 18
- 230000008859 change Effects 0.000 claims abstract description 9
- 230000000670 limiting effect Effects 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims description 65
- 229920005570 flexible polymer Polymers 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 29
- 230000009467 reduction Effects 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000004997 Liquid crystal elastomers (LCEs) Substances 0.000 claims description 4
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 4
- 239000002041 carbon nanotube Substances 0.000 claims description 4
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010257 thawing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a temperature sensing device suitable for a hypergravity centrifugal environment, which comprises a temperature sensitive mechanism, a heat conduction stretching mechanism and a luminous visual mechanism, wherein when the temperature changes, a shape memory temperature-induced shrinkage material in the temperature sensitive mechanism is reduced, and a flexible photonic crystal in the luminous visual mechanism is pulled by a flexible stretching belt in the heat conduction stretching mechanism, so that the flexible photonic crystal inclines towards the direction of the flexible stretching belt, and the lattice spacing in the flexible photonic crystal is changed due to the limiting effect of a thrust rod in the luminous visual mechanism, so that the diffraction wavelength of the flexible photonic crystal is changed, and the color change phenomenon is presented. According to the invention, a cable is not required to be laid, the shape memory temperature-induced shrinkage material is adopted to drive the flexible photonic crystal to deform, the diffraction color of the flexible photonic crystal is changed by deformation, and the temperature condition inside the supergravity model can be accurately mastered through the color.
Description
Technical Field
The invention relates to the technical field of supergravity, in particular to a temperature sensing device suitable for a supergravity centrifugal environment.
Background
At present, the supergravity model test is gradually applied to a new technology for strengthening multiphase flow transmission and reaction processes. Because of its wide applicability and the reduced scale characteristic which the traditional equipment does not have, the supergravity technology has wide commercial application prospect in the industrial fields of rock and soil, environmental protection, material biochemical industry and the like. The supergravity model test can be reduced in size and shorten the research time, and is therefore regarded as a "revolutionary engineering tool".
The supergravity technology has a typical scale effect, and the size of a conventional sensing device can be amplified by a plurality of times under the environment of a supergravity field due to the existence of the scale effect, so that the development of a tiny and precise sensing device is urgently needed.
In the supergravity rock-soil model test, temperature is used as important monitoring data, a temperature sensor is used for temperature acquisition, and because the cable of the existing temperature sensor is inevitably required to be arranged in the supergravity rock-soil model, the cable is subjected to the scale reduction effect in the rock-soil supergravity environment, so that the cable has the reinforcing effect on the rock-soil, the structure of the rock-soil body is damaged, the constitutive relation of the supergravity rock-soil model is damaged, and the centrifugal model test fails.
Disclosure of Invention
The invention aims to solve the technical problem of providing a temperature sensing device suitable for a hypergravity centrifugal environment, cables are not required to be laid, a shape memory temperature-induced shrinkage material is adopted to drive a flexible photonic crystal to deform, the deformation enables the diffraction color of the flexible photonic crystal to change, and the temperature condition inside a hypergravity model can be accurately mastered through the color.
The technical scheme of the invention is as follows:
a temperature sensing device suitable for a hypergravity centrifugal environment comprises a temperature sensing mechanism, a heat conduction stretching mechanism and a luminous visual mechanism;
the temperature sensitive mechanism comprises a heat conducting shell and a shape memory temperature-induced shrinkage material, wherein the shape memory temperature-induced shrinkage material is positioned in the heat conducting shell and is in heat conducting contact with the heat conducting shell;
the heat conduction stretching mechanism comprises a heat insulation guide pipe and a flexible stretching belt, one end of the heat insulation guide pipe is integrally connected with the heat conduction shell and communicated with the heat conduction shell, the flexible stretching belt is arranged in the heat insulation guide pipe, and one end of the flexible stretching belt is fixedly connected with the shape memory temperature-induced shrinkage material;
the luminous visual mechanism comprises a heat insulation shell, a plurality of thrust columns and a flexible photonic crystal, wherein the other end of the heat insulation guide pipe is integrally connected with the heat insulation shell and communicated with the heat insulation shell, the flexible photonic crystal is vertically arranged in the heat insulation shell, the bottom surface of the flexible photonic crystal is fixedly connected to the bottom surface of the heat insulation shell, the inner surface of the flexible photonic crystal is fixedly connected with the other end of the flexible stretching belt, the outer surface of the flexible photonic crystal faces the heat insulation shell, and the part of the heat insulation shell relative to the outer surface of the flexible photonic crystal is of a colorless transparent structure; a plurality of thrust columns are horizontally arranged in the heat insulation shell, the outer end of each thrust column is fixed on the heat insulation shell, and the inner ends of the plurality of thrust columns face the inner surface of the flexible photonic crystal horizontally and are uniformly distributed along the horizontal axial direction of the flexible photonic crystal;
when the temperature changes, the shape memory temperature-induced shrinkage material is reduced, the flexible photonic crystal is pulled by the shape memory temperature-induced shrinkage material through the flexible stretching belt, the flexible photonic crystal inclines towards the direction of the flexible stretching belt because the bottom surface of the flexible photonic crystal is fixed on the heat insulation shell, the outer surface of the part of the flexible photonic crystal, which is in contact with the pushing rods and limited, presents a convex structure, and the outer surface of the part of the flexible photonic crystal, which is not in contact with the pushing rods and limited, presents a concave structure, so that the lattice spacing in the flexible photonic crystal is changed, the diffraction wavelength of the flexible photonic crystal is changed, and the color change phenomenon is presented.
The inner cavity of the heat conduction shell is a circular cavity, the shape memory temperature-induced shrinkage material is of a circular plate-shaped structure, a circle of positioning columns are fixed on the circular inner wall of the heat conduction shell, the shape memory temperature-induced shrinkage material is arranged in the heat conduction shell and in heat conduction contact with the heat conduction shell, the circle of positioning columns are uniformly distributed on the periphery of the shape memory temperature-induced shrinkage material, and each positioning column is fixedly connected with the shape memory temperature-induced shrinkage material through a corresponding elastic limit belt, so that the shape memory temperature-induced shrinkage material is positioned in the heat conduction shell.
The shape memory temperature-induced shrinkage material is made of shape memory alloy or carbon nano tube/liquid crystal elastomer.
The flexible stretching strap sequentially passes through the row of limit guide plates, so that the radial position of the flexible stretching strap in the heat insulation duct is limited.
The flexible stretching strap sequentially passes through the guide gaps between each limiting guide plate and the heat-insulating guide pipe, so that the flexible stretching strap forms a serpentine bending conduction structure in the heat-insulating guide pipe.
The flexible stretching belt is a high-temperature-resistant heat insulation belt.
A row of supporting blocks are fixedly arranged on the bottom surface in the heat insulation shell, and the bottom surface of the flexible photonic crystal is fixedly connected to the row of supporting blocks.
The heat conducting shell is characterized in that two vertically arranged limit posts are arranged at the position adjacent to the heat insulation guide pipe in the heat conducting shell and the position adjacent to the heat insulation guide pipe in the heat conducting shell, and two ends of the flexible stretching belt respectively penetrate through the space between the two corresponding limit posts and are fixedly connected with the shape memory temperature-induced shrinkage material and the flexible photonic crystal.
The flexible photonic crystal comprises a flexible polymer substrate which is vertically arranged, the outer surface of the flexible polymer substrate is arranged on a microstructure array, the photonic crystal is packaged in the microstructure array, the bottom surface of the flexible polymer substrate is fixedly connected to the bottom surface of the heat insulation shell, and the inner surface of the flexible polymer substrate is fixedly connected with the other end of the flexible stretching belt.
The relation between the diffraction wavelength lambda and the lattice spacing d of the flexible photonic crystal is specifically shown in the following formula (1):
in the formula (1), k 4 The crystal lattice adjustment coefficient is the lattice adjustment coefficient under the bending condition of the flexible photonic crystal; k (k) 1 A coefficient of contact area reduction for the flexible polymer substrate; k (k) 5 Is the ambient temperature coefficient; n is n agv An average effective light transmittance index of the flexible photonic crystal; θ is the incident angle, which is a fixed value; m is the diffraction order; k (k) 3 The parting geometry tuning factor of the flexible polymer substrate.
The lattice adjustment coefficient k 4 The strain sigma and the strain sigma are in positive correlation linear relation, and the calculation formula of the strain sigma is shown in the following formula (2):
σ＝ε×k 1 ×k 2 ×ΔT (2)；
in the formula (2), epsilon is the thermal expansion coefficient of the photonic crystal; k (k) 1 A coefficient of contact area reduction for the flexible polymer substrate; k (k) 2 A flexural reduction coefficient for a flexible polymer substrate; delta T is the ambient temperature difference.
The invention has the advantages that:
(1) The temperature information is not acquired and transmitted through the temperature sensor, namely, the cable is prevented from being laid in a model soil body, the shape memory temperature-induced shrinkage material is adopted to drive the flexible photonic crystal to deform, the deformation enables the diffraction color of the flexible photonic crystal to change, the temperature and the corresponding color are calculated and calibrated before the temperature is acquired, the temperature condition inside the supergravity model can be accurately mastered through the color, and the temperature display is visual and accurate.
(2) The shape memory temperature-induced shrinkage material in the temperature-sensitive mechanism is made of shape memory alloy or carbon nano tube/liquid crystal elastomer (CNT-LCEs material), has the characteristics of temperature recovery and deformation recovery, and can be repeatedly used to realize acquisition and display of different temperatures.
(3) The temperature sensitive mechanism is internally provided with the positioning column and the elastic limiting belt for positioning the shape memory temperature-induced shrinkage material, so that the position of the shape memory temperature-induced shrinkage material in the heat conduction shell is limited, the shrinkage deformation of the shape memory temperature-induced shrinkage material is not influenced, and the tension distribution is uniform when the shape memory temperature-induced shrinkage material is shrunk.
(4) According to the invention, the limiting guide plate is arranged in the heat insulation guide pipe, so that radial displacement of the flexible stretching belt under the drive of the shape memory temperature-induced shrinkage material is avoided, calculation of the stretching length is influenced, and the flexible stretching belt is arranged into a serpentine bending structure through the arrangement of the limiting guide plate, so that deformation of the flexible stretching belt is avoided, and the accuracy of deformation quantity transmission of the shape memory temperature-induced shrinkage material is further ensured.
(5) The integrated packaging structure is convenient to rapidly arrange in the soil body of the supergravity rock-soil model, and temperature collection is realized through the color change condition of the flexible photonic crystal.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic diagram of the internal structure of the temperature sensitive mechanism of the present invention.
Fig. 3 is a schematic view of the internal structure of the luminous visual mechanism of the present invention.
Fig. 4 is a schematic structural view of a high-speed railway base scale model.
Reference numerals: the device comprises a 1-temperature sensitive mechanism, a 2-heat conduction stretching mechanism, a 3-luminous visual mechanism, a 4-limit column, a 11-heat conduction shell, a 12-shape memory temperature-induced shrinkage material, a 13-locating column, a 14-elastic limit belt, a 21-heat insulation guide pipe 21, a 22-limit guide plate, a 23-flexible stretching belt, a 31-heat insulation shell, a 32-thrust column, a 33-supporting block, a 34-flexible polymer substrate, a 35-microstructure array, a 36-vertical guide plate, a 5-high-speed railway base scale model, a 6-low temperature model box, a 7-visual window and 8-hydraulic excitation equipment.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a temperature sensing device suitable for a hypergravity centrifugal environment comprises a temperature sensitive mechanism 1, a heat conduction stretching mechanism 2 and a luminous visual mechanism 3;
referring to fig. 2, the temperature sensitive mechanism 1 includes a heat conductive shell 11 and a shape memory temperature-induced shrinkage material 12, wherein the shape memory temperature-induced shrinkage material 12 is made of a shape memory alloy or a carbon nanotube/liquid crystal elastomer; the inner cavity of the heat conduction shell 11 is a circular cavity, the shape memory temperature-induced shrinkage material 12 is of a circular plate-shaped structure, a circle of positioning columns 13 are fixed on the circular inner wall of the heat conduction shell 11, the shape memory temperature-induced shrinkage material 12 is arranged in the heat conduction shell 11 and is in heat conduction contact with the heat conduction shell 11, the circle of positioning columns 13 are uniformly distributed on the periphery of the shape memory temperature-induced shrinkage material 12, and each positioning column 13 is fixedly connected with the shape memory temperature-induced shrinkage material 12 through a corresponding elastic limit belt 14, so that the shape memory temperature-induced shrinkage material 12 is positioned in the heat conduction shell 11;
referring to fig. 2 and 3, the heat conduction stretching mechanism 2 includes a heat insulation conduit 21, a row of limit guide plates 22 and a flexible stretching belt 23, one end of the heat insulation conduit 21 is integrally connected with the heat conduction shell 11 and is mutually communicated with the heat conduction shell, the flexible stretching belt 23 is a high-temperature resistant heat insulation belt, deformation is basically not generated when the flexible stretching belt is heated, and one end of the flexible stretching belt 23 is fixedly connected with the shape memory temperature-induced shrinkage material 12; the two adjacent limit guide plates 22 are arranged in parallel along the axial direction of the heat insulation guide pipe 21, wherein the top end of one limit guide plate 22 is fixedly connected with the heat insulation guide pipe 21, a guide gap is reserved between the bottom end of the other limit guide plate 22 and the heat insulation guide pipe 21, a guide gap is reserved between the top end of the other limit guide plate 22 and the heat insulation guide pipe 21, and the flexible stretching belt 23 sequentially passes through the guide gap between each limit guide plate 22 and the heat insulation guide pipe 21, so that the flexible stretching belt 23 forms a serpentine bending conduction structure in the heat insulation guide pipe 21;
referring to fig. 3, the luminous visual mechanism 3 includes a heat insulation housing 31, eight thrust columns 32, a row of supporting blocks 33 and a flexible photonic crystal, the flexible photonic crystal includes a flexible polymer substrate 34 arranged vertically, the outer surface of the flexible polymer substrate 34 is arranged on a microstructure array 35, and the photonic crystal is packaged in the microstructure array 35; the other end of the heat insulation guide pipe 21 is integrally connected with the heat insulation shell 31 and is mutually communicated, a vertical guide plate 36 is fixedly arranged at a connection port of the heat insulation shell 31 and the heat insulation guide pipe 21, eight thrust columns 32 are horizontally arranged and are in an upper row and a lower row of structures, the outer end of each thrust column 32 is fixed on the heat insulation shell 31 or the vertical guide plate 36, a row of support blocks 33 are fixedly arranged on the bottom surface in the heat insulation shell 31, the bottom surface of a flexible polymer substrate 34 is fixedly connected with a row of support blocks 33, the other end of a flexible stretching belt 23 penetrates through the vertical guide plate 36 and is fixedly connected with the inner surface of the flexible polymer substrate 34, the outer surface of a flexible photonic crystal faces the heat insulation shell 31, the part of the heat insulation shell 31 opposite to the outer surface of the flexible photonic crystal is in a colorless transparent structure, the inner ends of the eight thrust columns 32 face the inner surface of the flexible polymer substrate 34 horizontally and each row of four thrust columns 32 are uniformly distributed along the horizontal axial direction of the flexible polymer substrate 34;
wherein, two vertically arranged limit posts 4 are arranged at the position of the heat conduction shell 11 adjacent to the heat insulation guide pipe 21 and the position of the heat insulation shell 31 adjacent to the heat insulation guide pipe 21, and two ends of the flexible stretching strap 23 respectively pass through the positions between the two corresponding limit posts 4 and are fixedly connected with the shape memory temperature-induced shrinkage material 12 and the inner surface of the flexible photonic crystal flexible polymer substrate 34.
When the temperature changes, the shape memory temperature-induced shrinkage material 12 is reduced, the shape memory temperature-induced shrinkage material 12 pulls the flexible photonic crystal through the flexible stretching belt 23, and as the bottom surface of the flexible polymer substrate 34 of the flexible photonic crystal is fixed on the heat insulation shell 31, the flexible photonic crystal inclines towards the direction of the flexible stretching belt 23, and as the limiting effect of the thrust rod 32, the outer surface of the part of the flexible photonic crystal, which is in contact with the thrust rod 32 and limited, presents a convex structure, and the outer surface of the part of the flexible photonic crystal, which is not in contact with the thrust rod 32 and limited, presents a concave structure, so that the lattice spacing inside the flexible photonic crystal is changed, and the diffraction wavelength of the flexible photonic crystal is changed, so that the color change phenomenon is presented.
Wherein, the relation between the diffraction wavelength lambda and the lattice spacing d of the flexible photonic crystal is specifically shown in the following formula (1):
in the formula (1), k 4 The crystal lattice adjustment coefficient is the lattice adjustment coefficient under the bending condition of the flexible photonic crystal; k (k) 1 A coefficient of contact area reduction for the flexible polymer substrate; k (k) 5 Is the ambient temperature coefficient; n is n agv Average effective light transmittance index for flexible photonic crystalThe method comprises the steps of carrying out a first treatment on the surface of the θ is the incident angle, which is a fixed value; m is the diffraction order; k (k) 3 The parting geometry tuning factor of the flexible polymer substrate.
Lattice accommodation coefficient k 4 The strain sigma and the strain sigma are in positive correlation linear relation, and the calculation formula of the strain sigma is shown in the following formula (2):
σ＝ε×k 1 ×k 2 ×ΔT (2)；
in the formula (2), epsilon is the thermal expansion coefficient of the photonic crystal; k (k) 1 A coefficient of contact area reduction for the flexible polymer substrate; k (k) 2 A flexural reduction coefficient for a flexible polymer substrate; delta T is the ambient temperature difference.
High-gravity high-speed railway scale model test: the construction of the high-speed railway in the seasonal frozen soil area has strict requirements on the smoothness of the track in the freezing and thawing cycle process, and the adoption of the reduced-scale high-speed railway freezing and thawing test has great advantages in time and money because a large amount of financial resources and material resources are consumed in the full-scale roadbed freezing and thawing test.
Referring to fig. 4, a high-speed railway base scale model 5 is placed in a low-temperature model box 6 and placed in a basket 6 of a centrifuge; one side of the low-temperature model box 6 is provided with a visual window 7, a temperature sensitive mechanism 1 and a heat conduction stretching mechanism 2 of the temperature sensing device are buried in a roadbed of the high-speed railway base scale model 5, a luminous visual mechanism 3 is located outside the roadbed and adjacent to the visual window 7, the outer surface of the flexible photonic crystal faces the visual window 7, hydraulic excitation equipment 8 on the high-speed railway base scale model 5 is excited to simulate the running process of a high-speed railway, an acquisition camera facing the luminous visual mechanism 3 is arranged outside the low-temperature model box 6, the change condition of the color of the luminous visual mechanism 3 is recorded in a video image mode, and the temperature change condition inside the roadbed can be known.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (11)
1. The utility model provides a temperature sensing device suitable for under hypergravity centrifugation environment which characterized in that: comprises a temperature sensitive mechanism, a heat conduction stretching mechanism and a luminous visual mechanism;
the temperature sensitive mechanism comprises a heat conducting shell and a shape memory temperature-induced shrinkage material, wherein the shape memory temperature-induced shrinkage material is positioned in the heat conducting shell and is in heat conducting contact with the heat conducting shell;
the heat conduction stretching mechanism comprises a heat insulation guide pipe and a flexible stretching belt, one end of the heat insulation guide pipe is integrally connected with the heat conduction shell and communicated with the heat conduction shell, the flexible stretching belt is arranged in the heat insulation guide pipe, and one end of the flexible stretching belt is fixedly connected with the shape memory temperature-induced shrinkage material;
the luminous visual mechanism comprises a heat insulation shell, a plurality of thrust columns and a flexible photonic crystal, wherein the other end of the heat insulation guide pipe is integrally connected with the heat insulation shell and communicated with the heat insulation shell, the flexible photonic crystal is vertically arranged in the heat insulation shell, the bottom surface of the flexible photonic crystal is fixedly connected to the bottom surface of the heat insulation shell, the inner surface of the flexible photonic crystal is fixedly connected with the other end of the flexible stretching belt, the outer surface of the flexible photonic crystal faces the heat insulation shell, and the part of the heat insulation shell relative to the outer surface of the flexible photonic crystal is of a colorless transparent structure; a plurality of thrust columns are horizontally arranged in the heat insulation shell, the outer end of each thrust column is fixed on the heat insulation shell, and the inner ends of the plurality of thrust columns face the inner surface of the flexible photonic crystal horizontally and are uniformly distributed along the horizontal axial direction of the flexible photonic crystal;
when the temperature changes, the shape memory temperature-induced shrinkage material is reduced, the flexible photonic crystal is pulled by the shape memory temperature-induced shrinkage material through the flexible stretching belt, the flexible photonic crystal inclines towards the direction of the flexible stretching belt because the bottom surface of the flexible photonic crystal is fixed on the heat insulation shell, the outer surface of the part of the flexible photonic crystal, which is in contact with the pushing rods and limited, presents a convex structure, and the outer surface of the part of the flexible photonic crystal, which is not in contact with the pushing rods and limited, presents a concave structure, so that the lattice spacing in the flexible photonic crystal is changed, the diffraction wavelength of the flexible photonic crystal is changed, and the color change phenomenon is presented.
2. A temperature sensing device adapted for use in a hypergravity centrifugal environment according to claim 1, wherein: the inner cavity of the heat conduction shell is a circular cavity, the shape memory temperature-induced shrinkage material is of a circular plate-shaped structure, a circle of positioning columns are fixed on the circular inner wall of the heat conduction shell, the shape memory temperature-induced shrinkage material is arranged in the heat conduction shell and in heat conduction contact with the heat conduction shell, the circle of positioning columns are uniformly distributed on the periphery of the shape memory temperature-induced shrinkage material, and each positioning column is fixedly connected with the shape memory temperature-induced shrinkage material through a corresponding elastic limit belt, so that the shape memory temperature-induced shrinkage material is positioned in the heat conduction shell.
3. A temperature sensing device adapted for use in a hypergravity centrifugal environment according to claim 1, wherein: the shape memory temperature-induced shrinkage material is made of shape memory alloy or carbon nano tube/liquid crystal elastomer.
4. A temperature sensing device adapted for use in a hypergravity centrifugal environment according to claim 1, wherein: the flexible stretching strap sequentially passes through the row of limit guide plates, so that the radial position of the flexible stretching strap in the heat insulation duct is limited.
5. A temperature sensing device adapted for use in a hypergravity centrifugal environment according to claim 4, wherein: the flexible stretching strap sequentially passes through the guide gaps between each limiting guide plate and the heat-insulating guide pipe, so that the flexible stretching strap forms a serpentine bending conduction structure in the heat-insulating guide pipe.
6. A temperature sensing device adapted for use in a hypergravity centrifugal environment according to claim 1, wherein: the flexible stretching belt is a high-temperature-resistant heat insulation belt.
7. A temperature sensing device adapted for use in a hypergravity centrifugal environment according to claim 1, wherein: a row of supporting blocks are fixedly arranged on the bottom surface in the heat insulation shell, and the bottom surface of the flexible photonic crystal is fixedly connected to the row of supporting blocks.
8. A temperature sensing device adapted for use in a hypergravity centrifugal environment according to claim 1, wherein: the heat conducting shell is characterized in that two vertically arranged limit posts are arranged at the position adjacent to the heat insulation guide pipe in the heat conducting shell and the position adjacent to the heat insulation guide pipe in the heat conducting shell, and two ends of the flexible stretching belt respectively penetrate through the space between the two corresponding limit posts and are fixedly connected with the shape memory temperature-induced shrinkage material and the flexible photonic crystal.
9. A temperature sensing device adapted for use in a hypergravity centrifugal environment according to claim 1, wherein: the flexible photonic crystal comprises a flexible polymer substrate which is vertically arranged, the outer surface of the flexible polymer substrate is arranged on a microstructure array, the photonic crystal is packaged in the microstructure array, the bottom surface of the flexible polymer substrate is fixedly connected to the bottom surface of the heat insulation shell, and the inner surface of the flexible polymer substrate is fixedly connected with the other end of the flexible stretching belt.
10. A temperature sensing device adapted for use in a hypergravity centrifugal environment according to claim 9, wherein: the relation between the diffraction wavelength lambda and the lattice spacing d of the flexible photonic crystal is specifically shown in the following formula (1):
in the formula (1), k 4 The crystal lattice adjustment coefficient is the lattice adjustment coefficient under the bending condition of the flexible photonic crystal; k (k) 1 A coefficient of contact area reduction for the flexible polymer substrate; k (k) 5 Is the ambient temperature coefficient; n is n agv An average effective light transmittance index of the flexible photonic crystal; θ is the incident angle, which is a fixed value; m is the diffraction order; k (k) 3 The parting geometry tuning factor of the flexible polymer substrate.
11. A temperature sensing device adapted for use in a hypergravity centrifugal environment according to claim 10, wherein: the lattice adjustment coefficient k 4 The strain sigma and the strain sigma are in positive correlation linear relation, and the calculation formula of the strain sigma is shown in the following formula (2):
σ＝ε×k 1 ×k 2 ×ΔT (2)；
in the formula (2), epsilon is the thermal expansion coefficient of the photonic crystal; k (k) 1 A coefficient of contact area reduction for the flexible polymer substrate; k (k) 2 A flexural reduction coefficient for a flexible polymer substrate; delta T is the ambient temperature difference.
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| US20130148690A1 (en) * | 2011-12-13 | 2013-06-13 | Nano And Advanced Materials Institute Limited | Time temperature indicator by chromatography and photonic lattice changes |
| CN102590932A (en) * | 2012-03-14 | 2012-07-18 | 天津理工大学 | Liquid crystal doped photonic crystal fiber sensing model with novel structure |
| US20160153907A1 (en) * | 2014-12-02 | 2016-06-02 | Infineon Technologies Ag | Photonic crystal sensor structure and a method for manufacturing the same |
| CN107607217A (en) * | 2017-08-22 | 2018-01-19 | 哈尔滨工程大学 | Temperature, pressure integrated sensing device and measuring method based on high double-refraction photon crystal fiber surface plasma resonance |
| CN210922881U (en) * | 2019-08-19 | 2020-07-03 | 苏州科技大学 | Overtemperature indicating device based on photonic crystal structural color |
| CN211147882U (en) * | 2019-08-19 | 2020-07-31 | 苏州中科纳福材料科技有限公司 | Overtemperature indicating device based on photonic crystal structural color |
| KR102186972B1 (en) * | 2019-08-26 | 2020-12-04 | 한국전력공사 | Sensor for simultaneous measurement of temperature and strain comprising long period fiber grating inscribed on polarization maintaining photonic crystal fiber and method for simultaneously measuring temperature and strain using the same |
| CN113340442A (en) * | 2021-06-01 | 2021-09-03 | 苏州科技大学 | Overtemperature indicator based on photonic crystal structural color |
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