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Strain sensor

A technology of strain sensor and deformation variable, applied in the field of strain sensor, can solve problems such as narrow application range, and achieve the effect of large detection range and fast response speed

Inactive Publication Date: 2018-02-23
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, metal materials are usually used as the basic material of the strain sensor, but due to the strong mechanical properties of the metal material, its expansion and contraction is less than 5%, which makes the application range of this metal strain sensor narrow

Method used

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Embodiment Construction

[0015] The strain sensor provided by the present invention will be further described below with reference to the drawings and specific embodiments.

[0016] see figure 1 , the first embodiment of the present invention provides a strain sensor 100 , the strain sensor 100 includes: a substrate 101 , a carbon nanotube film 102 , a first electrode 105 , a second electrode 106 and a detector 107 . The matrix 101 and the carbon nanotube film 102 form a composite structure. The carbon nanotube film 102 is disposed on the surface of the substrate 101 and fixed. The first electrode 105 and the second electrode 106 are respectively arranged at two ends of the carbon nanotube film 102 and electrically connected with the carbon nanotube film 102 . The detector 107 is used to detect the resistance value of the carbon nanotube film 102 and is electrically connected to the first electrode 105 and the second electrode 106 .

[0017] The matrix 101 mainly plays a supporting role for providi...

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Abstract

The invention relates to a strain sensor comprising the following units: a compound structure including an elastic matrix and a carbon nanotube film supported by the elastic matrix, wherein the carbonnanotube film defines a telescopic direction and comprises a plurality of carbon nanotubes extending in the same direction, the carbon nanotube extension direction is vertical to the telescopic direction, and the carbon nanotubes are connected end to end in the extension direction; a first electrode and a second electrode respectively arranged on two ends of the carbon nanotube film telescopic direction, and electrically connected with the carbon nanotube film; a detector electrically connected with the first and second electrodes.

Description

technical field [0001] The invention relates to a strain sensor, in particular to a strain sensor based on a carbon nanotube film. Background technique [0002] With the continuous development and increase of stretchable devices, strain sensors for measuring the strain capacity of devices have become a research hotspot recently. Many materials can be used as strain sensors. In the prior art, metal materials are usually used as the basic material of the strain sensor, but due to the strong mechanical properties of the metal material, the stretching amount thereof is less than 5%, so that the application range of the metal strain sensor is narrow. Contents of the invention [0003] In view of this, it is indeed necessary to provide a strain sensor capable of overcoming the above disadvantages. [0004] A strain sensor, which includes: a composite structure, the composite structure includes an elastic matrix and a carbon nanotube film, the carbon nanotube film is supported ...

Claims

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Application Information

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IPC IPC(8): G01B7/16
CPCG01B7/18G01L1/18G01L1/2287
Inventor 于洋王佳平姜开利范守善
Owner TSINGHUA UNIV
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