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Method for improving sensitivity of strain sensor by optical assistance

A stress sensor, light-assisted technology, applied in the field of stress sensors and sensors, can solve problems such as low sensitivity

Inactive Publication Date: 2019-11-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low sensitivity in the prior art, and to provide a method for light-assisted improvement of the sensitivity of the stress sensor

Method used

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  • Method for improving sensitivity of strain sensor by optical assistance
  • Method for improving sensitivity of strain sensor by optical assistance

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Embodiment 1

[0030] A method for light-assisted enhancement of the sensitivity of stress sensors such as Figure 5 , 6 As shown, the light-assisted method is used: the stress sensor based on the two-dimensional material receives light while the electrical property changes under the influence of the stress; the light is used as an auxiliary function to inject additional carriers into the two-dimensional material, so that the electrical property changes The amplitude is increased, so as to achieve the purpose of improving the sensitivity of the stress sensor.

[0031] The high-sensitivity stress sensor prepared by the above method includes: a two-dimensional material, a flexible substrate, a conductive electrode, a wire and a light source; the two-dimensional material is placed on the flexible substrate, and the conductive electrode is placed on the two-dimensional material and the flexible between the substrates; illuminate the two-dimensional material part with a light source; connect wir...

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Abstract

The invention relates to a method for improving the sensitivity of a strain sensor by optical assistance, belonging to the field of sensors. In the invention, an optical assistance approach is adoptedto enable a strain sensor based on a two-dimensional material to be illuminated when the electrical properties of the sensor are changed due to the influence of stress. The illumination assists in injecting additional carriers into the two-dimensional material, so that when the material is deformed due to stress, the injected additional carriers can adjust the height of effective Schottky barrierbetween an electrode and the two-dimensional material so as to improve the sensitivity of the strain sensor. The stress makes the two-dimensional material deform, which will change the energy band structure of the two-dimensional material and the Schottky barrier between the two-dimensional material and the conductive electrode in contact with the two-dimensional material. The optical assistanceapproach can help inject additional carriers into the two-dimensional material, and the process will also be affected by the stress effect. The two stress responses can be superposed by the optical assistance approach, so as to improve the sensitivity of the strain sensor.

Description

technical field [0001] The invention relates to the field of stress sensors and a method for light injection of carriers, in particular to a method for light-assisted improvement of the sensitivity of a stress sensor, which belongs to the field of sensors. Background technique [0002] A strain sensor is a sensor that measures the strain generated by the deformation of an object under force. The most traditional one is the resistance strain gauge type stress sensor, which can convert the deformation of the mechanical component due to stress into a change in resistance. After calibration of the resistance and deformation, the stress or deformation of the mechanical component can be known. [0003] However, the sensitivity of traditional stress sensors is generally low, for example, the sensitivity (gauge factor, GF) of metal-based stress sensors is usually in the range of 1-5. However, the light-assisted method of this application can greatly improve the sensitivity of the s...

Claims

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Application Information

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IPC IPC(8): G01L1/26
CPCG01L1/26
Inventor 吴汉春闫文杰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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