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Temperature detection device based on surface plasmon

A surface plasmon and detection device technology, applied in the field of temperature detection, can solve the problems of low detection accuracy and large interference, and achieve the effects of small size, avoiding potential safety hazards and facilitating integration

Pending Publication Date: 2021-11-05
YUNNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems that the existing sensors are greatly disturbed by the environment and the detection accuracy is not high when used in harsh environments, the present invention provides a temperature detection device based on surface plasmons, which avoids the use in harsh environments The problem of large error and low detection accuracy

Method used

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  • Temperature detection device based on surface plasmon
  • Temperature detection device based on surface plasmon
  • Temperature detection device based on surface plasmon

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the temperature detection device based on surface plasmons includes a transparent elastic material layer 1, a metal array structure and a thermal expansion material block 3; the metal array structure is arranged on the transparent elastic material layer 1; the metal array The structure is composed of periodically arranged metal units 2, and gaps are arranged on the metal units 2; there are gaps 4 between the metal units 2 and the metal units 2; the thermal expansion material blocks 3 are arranged in the gaps.

[0038] The thermal expansion material block is made of ethylene-vinyl acetate polymer with a large thermal expansion coefficient, and the temperature change of the thermal expansion material block is proportional to the length change, so as to realize temperature detection with higher sensitivity.

[0039] The material of the transparent elastic material layer is polydimethylsiloxane, so that light can pass through the transparent elast...

Embodiment 2

[0047] Such as figure 2As shown, the temperature detection device based on surface plasmons includes a transparent elastic material layer 1, a metal array structure and a thermal expansion material block 3, and the metal array structure is arranged on the transparent elastic material layer 1; the metal array structure consists of a periodic Arranged metal units, the metal unit is provided with a through gap, the cross section of the gap is rectangular. The metal unit is divided into a first metal block 21 and a second metal block 22, and the thermal expansion material block 3 is arranged in a gap between the first metal block 21 and the second metal block 22. That is to say, the heat-expandable material block 3 is in contact with the transparent elastic material layer 1 , and the expansion of the heat-expandable material block 3 will drive the deformation of the transparent elastic material layer 1 .

[0048] Specifically, in the present invention, light is irradiated on the...

Embodiment 3

[0051] On the basis of embodiment 2, the difference between the present invention and embodiment 2 only lies in, as image 3 As shown, the notch on the metal unit of this embodiment is trapezoidal, and the notch runs through the metal unit, increasing the contact area with the first metal block 21 and the second metal block 22. In addition, the thermal expansion material block 3 received by the metal block The thrust of expansion is not uniform, the thrust received by the upper ends of the first metal block 21 and the second metal block 22 increases, the gap 4 between the first metal block 21 and the adjacent second metal block 22 becomes an inverted wedge shape, and light passes through the gap The amount transmitted is reduced. The gap is trapezoidal, and the gap 4 changes more when the temperature changes, the red shift of the spectral line is more obvious, and the accuracy of temperature detection is higher.

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Abstract

The invention belongs to the field of temperature detection and particularly relates to a surface plasmon-based temperature detection device. The device comprises a transparent elastic material layer, a metal array structure and a thermal expansion material block, wherein the metal array structure is arranged on the transparent elastic material layer, the metal array structure is composed of metal units arranged periodically, notches are formed in the metal units, gaps are formed between the metal units, and the thermal expansion material block is arranged in the notches. The thermal expansion material block expands and the gap is narrowed due to the change of the temperature, so the position of the resonance valley in the emergent spectrum is moved, and temperature detection is realized through the position movement of the resonance valley. According to the device, temperature detection is realized based on surface plasmon, temperature detection is realized by detecting optical signals, and the device is simple in structure, is more beneficial to use in a severe environment, and is high in detection precision, small in size and convenient to integrate.

Description

technical field [0001] The invention belongs to the field of temperature detection, in particular to a temperature detection device based on surface plasmons. Background technique [0002] At present, temperature sensors play an important role in safe production. For example, temperature-related instruments in the laboratory, temperature-controlled test chambers, and high-temperature furnaces; in places related to temperature in production, the temperature in mines and workshops, etc. However, most of the traditional temperature sensors are realized by the change of electrical signal, and the temperature sensor based on the change of electrical signal is greatly limited in practical application. Additional potential safety hazards. On the other hand, when used in harsh environments, they are greatly disturbed by the environment and the detection accuracy is not high. Contents of the invention [0003] In order to overcome the problems that the existing sensors are greatl...

Claims

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Application Information

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IPC IPC(8): G01K11/00
CPCG01K11/006
Inventor 杨雯李佳保杨培志邓书康葛文王琴
Owner YUNNAN NORMAL UNIV
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