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Flexible wearable mechanical sensor and manufacturing method thereof

A sensor and mechanical technology, applied in the field of flexible wearable mechanical sensors and their preparation, can solve the problems of low sensitivity, single detection position, and low detection range of flexible mechanical sensors, and achieve excellent mechanical sensitivity characteristics, high measurable range, The effect of high sensitivity

Inactive Publication Date: 2018-09-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above existing problems or deficiencies, in order to solve the problems of relatively low sensitivity, relatively low detection range and single detection position of existing flexible mechanical sensors, the present invention provides a flexible wearable mechanical sensor and its preparation method

Method used

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  • Flexible wearable mechanical sensor and manufacturing method thereof
  • Flexible wearable mechanical sensor and manufacturing method thereof
  • Flexible wearable mechanical sensor and manufacturing method thereof

Examples

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Embodiment 1

[0023] (1) Preparation of mixed dispersion

[0024] The graphene dispersion is prepared by dispersing natural graphite in N-methylpyrrolidone (NMP), with a mass fraction of deionized water of 0.2; 50 mg of natural graphite is added to 10 ml of solvent, and ultrasonically dispersed using a sonicator. The ultrasonic power was set at 60W in the pulsed operation mode (on for 2s, off for 3s) for 15 hours, followed by standing for 24 hours to allow the deposition of graphite aggregates that were not dispersed by ultrasound.

[0025] The dispersion was then centrifuged at 3000 rpm for 15 minutes. The obtained supernatant is a graphene dispersion. SWCNT dispersions were prepared by sonicating a mixture of 30 mg SWCNT (single-walled carbon nanotubes) and 105 mg TNWDIS (carbon nanotube aqueous dispersant) in 100 g deionized water. The ultrasonic treatment conditions are the same as those for preparing the graphene dispersion except for the ultrasonic treatment time of 2.5 hours. The ...

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Abstract

The invention belongs to the field of flexible pressure sensors and particularly relates to a flexible wearable mechanical sensor and a manufacturing method thereof. A carbon nanotube / graphene composite film material for study on a supercapacitor and a battery is used for a stress sensor. Graphene fragments in the carbon nanotube / graphene composite film material are used for forming isolated island conductive regions, carbon nanotubes become bridges connecting the island graphene blocks, and an island bridge structure formed by the two forms a conductive channel between electrodes. Due to thestructural feature, the resistance model of the whole device changes a lot, and good resistance change feature is expressed. The strain coefficient of the flexible wearable mechanical sensor can reachas high as 190, the sensitivity is higher, a high measurable range is reached, a tensile range of 150% can be reached maximally, the device repeatability is strong, the process is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the field of flexible pressure sensors, in particular to a flexible wearable mechanical sensor and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, the aging population, and the increasingly serious modern environmental pollution, people pay more and more attention to their health, and flexible wearable devices have emerged as the times require. The problem faced by flexible wearable devices in the field of artificial intelligence and human-computer interaction is how to collect many complex mechanical change signals on complex and changeable surfaces. The core of the measurement of electrocardiogram, body temperature, blood pressure and blood sugar lies in the preparation of flexible mechanical sensors. The sensitive materials currently used in flexible wearable devices mainly include metal materials, piezoelectric materials and carbon nanomaterials. Metal materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22G01L9/04C01B32/19B29C41/08
CPCB29C41/08C01B32/19G01L1/22G01L9/04
Inventor 黄文张华龚天巡艾琴琴毛琳娜郭俊雄俞滨
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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