Wireless passive flexible pressure sensor based on double-layer asymmetric LC resonance

A pressure sensor, wireless passive technology, applied in the field of flexible pressure sensors, can solve the problems of low sensitivity and short measurement distance

Inactive Publication Date: 2020-07-07
TIANJIN UNIV
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  • Abstract
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Problems solved by technology

[0004] In order to solve the problems in the prior art, the present invention provides a wireless passive flexible pressure sensor based on double-layer asymmetric LC resonance, which solves the short measurement distance and low sensitivity of the wireless passive technology of LC resonance in the prior art. question

Method used

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  • Wireless passive flexible pressure sensor based on double-layer asymmetric LC resonance
  • Wireless passive flexible pressure sensor based on double-layer asymmetric LC resonance
  • Wireless passive flexible pressure sensor based on double-layer asymmetric LC resonance

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Embodiment Construction

[0018] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer and clearer, a further detailed description will be given below with reference to the accompanying drawings and embodiments.

[0019] Print the planar spiral inductor clockwise (from the inside to the outside) on the side of the flexible substrate polydimethylsiloxane (PDMS), and print the planar spiral inductor counterclockwise (from the inside to the outside) on the flexible substrate at the same time The other side. The detection coil generates an alternating magnetic field, which couples with the asymmetric LC loops on the upper and lower sides of the flexible substrate, so that a resonance frequency is generated on the detection coil. When the substrate is subjected to pressure, under the asymmetric double-layer LC structure, the farthest measurement distance of the detection coil is increased, and the offset of the resonance point is increased, which effective...

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Abstract

The invention discloses a wireless passive flexible pressure sensor based on double-layer asymmetric LC resonance. Two sides of a flexible substrate are each printed with an LC resonance circuit, theflexible substrate is of an asymmetric structure, and planar spiral inductors at two sides respectively adopt a clockwise direction from inside to outside and an anticlockwise direction from inside tooutside. A double-layer asymmetric LC resonance circuit structure is adopted, and the detection distance and sensitivity of the wireless passive sensor based on LC resonance can be optimized. By adopting the polydimethylsiloxane (PDMS) flexible substrate, the application of wearable devices, electronic skin, medical detection and the like can be met.

Description

Technical field [0001] The invention relates to the field of flexible pressure sensors, in particular to a wireless passive flexible pressure sensor based on double-layer asymmetric LC resonance. Background technique [0002] Flexible pressure sensors have the characteristics of small size, high sensitivity, large deformation resistance, etc., and are well used in important fields such as electronic skin, medical detection, and wearable devices. The existing capacitive flexible pressure sensors have the advantages of high sensitivity, fast dynamic response, etc., but they all use active structures and need to sputter metal electrodes on the flexible substrate. In practical applications, they have low work efficiency, high maintenance costs, and high maintenance costs. The problem of high energy consumption. Therefore, a wireless passive design is required to avoid the application shortcomings of the current wired structure sensor and expand the application range of the sensor. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/14G01L9/10
CPCG01L1/14G01L9/10
Inventor 杨林于仕辉娄文涛秦国轩
Owner TIANJIN UNIV
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