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Flexible force sensor and preparation method thereof, array device, and application of flexible force sensor

A sensor and flexible force technology, applied in the field of flexible force-sensitive sensor and its preparation, can solve the problems of restricting the practical application of piezoresistive force-sensitive sensor, complex manufacturing technology, expensive cost, etc., to achieve enhanced wearability and sensitivity, enhanced Sensing ability, effect of improving structural elasticity

Inactive Publication Date: 2018-08-31
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the practical application of piezoresistive force sensors is limited due to the current high cost, complex manufacturing techniques, and low stability.

Method used

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  • Flexible force sensor and preparation method thereof, array device, and application of flexible force sensor
  • Flexible force sensor and preparation method thereof, array device, and application of flexible force sensor
  • Flexible force sensor and preparation method thereof, array device, and application of flexible force sensor

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preparation example Construction

[0024] A method for preparing a flexible force-sensitive sensor provided by an embodiment of the present invention comprises the following steps:

[0025] S1. Mix the PDMS substrate and curing agent in a weight ratio of 5:1 to obtain a PDMS prepolymer; after stirring the PDMS prepolymer once, add carbon black and perform a second stirring to obtain the initial product of carbon black / PDMS ink ; After the second stirring, the bubbles of the initial product of carbon black / PDMS ink were removed under vacuum conditions to obtain carbon black / PDMS ink.

[0026] It should be noted that, in order to ensure more complete mixing and good dispersibility of each component in the mixture, the first stirring and the second stirring in the embodiment of the present invention are both mechanical stirring. Wherein, the time of primary stirring is 5-8min; the time of secondary stirring is 30-40min. Preferably, the time for primary stirring is 5 minutes; the time for secondary stirring is 30 ...

Embodiment 1

[0041] This embodiment proposes a method for preparing a flexible force-sensitive sensor, which includes the following steps:

[0042] First, mix the PDMS substrate and the curing agent at a weight ratio of 5:1 to obtain a PDMS prepolymer; after stirring the PDMS prepolymer once with a mechanical stirrer, add carbon black at normal temperature and pressure and perform a second Stir to obtain the primary product of carbon black / PDMS ink; after the second stirring, remove the bubbles of the primary product of carbon black / PDMS ink under vacuum conditions to obtain carbon black / PDMS ink. Wherein, the primary stirring time is 5 minutes, and the secondary stirring time is 30 minutes.

[0043] Secondly, the carbon black / PDMS ink was spin-coated on the ground glass sheet mold with a microstructure on the surface at a speed of 600 revolutions per minute by a spin-coating machine, and cured at 70°C for 2 hours, and then the cured The carbon black / PDMS ink was peeled from the ground gl...

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Abstract

The invention relates to the technical field of sensor preparation, particularly to a flexible force sensor and a preparation method thereof, an array device, and application of a flexible force sensor. A microstructured film is made by PDMS, so that the structural elasticity is enhanced by the low Young's modulus of PDMS and the wearability and sensitivity of the flexible force sensor are strengthened; on the basis of a surface-bionic random multilayer microstructure, the sensitivity of the sensitive sensor is enhanced substantially and the sensing capability to the micro stress is improved;and thus the piezoresistive flexible force sensor can be applied to health fields such as medical monitoring so as to monitor various body signals like the pulse and breathing in real time. Besides, the preparation method of the flexible force sensor has the high processability and low cost, so that large-scale production is realized well. And with the method provided by the invention, bionic surfaces with different shapes, different levels, different scales, different dimensions, and different functions can be obtained.

Description

technical field [0001] The invention relates to the technical field of sensor preparation, in particular to a flexible force-sensitive sensor, a preparation method, an array device and an application thereof. Background technique [0002] Electronic skin is a new type of wearable flexible bionic tactile sensor, which is a kind of artificial flexible electronic device used to realize the function of imitating human tactile perception. An electronic device or electronic system that uses sensor technology, micro-electromechanical technology and new material technology to imitate the functions of human skin protection, perception, regulation, etc. Electronic skin simulates the sensing function of human skin by fabricating sensitive electronic devices on flexible substrates, in order to achieve or even exceed the sensing performance of skin, thus showing application prospects in robotics, artificial limbs, medical detection and diagnosis. Tactile perception is one of the main fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22A61B5/00
CPCA61B5/6843G01L1/22
Inventor 邓维礼杨维清翟福琪杨涛赵凡漪朱婷蔡万源李兆峰熊达田果
Owner SOUTHWEST JIAOTONG UNIV
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