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Low-cost high-performance human motion sensor and preparation method thereof

A human motion, high-performance technology, applied in the field of sensors, can solve the problems of poor stretchability and low sensitivity, and achieve the effects of low cost, simple preparation process, and detection of large strains

Inactive Publication Date: 2018-05-11
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Graphite has stable chemical properties and excellent electrical conductivity, but traditional strain sensors made of graphite have some disadvantages, such as poor stretchability, low sensitivity, etc.

Method used

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  • Low-cost high-performance human motion sensor and preparation method thereof
  • Low-cost high-performance human motion sensor and preparation method thereof
  • Low-cost high-performance human motion sensor and preparation method thereof

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preparation example Construction

[0021] The invention provides a low-cost, high-performance human motion sensor and a preparation method thereof.

[0022] Such as figure 1 As shown, in the sensor, the strain-sensitive material 2 is uniformly covered on the stretchable flexible substrate 1 , and the wires 3 are connected to both ends of the strain-sensitive material 2 .

[0023] The stretchable flexible substrate 1 is obtained by solidifying liquid with a thickness of 1-3 mm, can be cut into any shape, and can be stretched to more than 3 times its own length. The strain-sensitive material 2 is a graphite particle film with a thickness of 50-200 μm, and the film is obtained from the film layer above the graphite particle suspension through a pulling method, which is repeated several times. The strain-sensitive material 2 of the low-cost, high-performance human body motion sensor has a wire 3 at both ends, and the wire 3 is fixed on the strain-sensitive material 2 through conductive silver glue. The strain sen...

Embodiment 1

[0030] Step 1: Curing the liquid flexible substrate Ecoflex 0030 from Smooth-On Company of the United States, the curing thickness is 2mm, and cutting the cured flexible substrate into a rectangular silicone substrate with a length of 30mm and a width of 10mm;

[0031] Step 2: Mix the graphite powder and deionized water at a ratio of 3g / 100ml to obtain a suspension, and then place the suspension in an ultrasonic cell pulverizer for ultrasonic treatment for 30 minutes, so that the graphite powder is evenly dispersed on the surface of the deionized water , forming a dense metallic graphite film with a thickness of about 10 μm;

[0032] Step 3: Put the flexible substrate described in step 1 under the graphite film on the surface of the graphite powder suspension described in step 2, and then pull it upwards, so that the graphite film, that is, the strain-sensitive material, is combined with the flexible substrate, and repeat this step 5 times to obtain a conductive film with a th...

Embodiment 2

[0037] Step 1: Curing the liquid flexible substrate Ecoflex 0050 from Smooth-On Company of the United States, the curing thickness is 3mm, and cutting the cured flexible substrate into a rectangular silicone substrate with a length of 50mm and a width of 20mm;

[0038] Step 2: Mix the graphite powder and deionized water at a ratio of 5g / 100ml to obtain a suspension, and then place the suspension in an ultrasonic cell pulverizer for ultrasonic treatment for 30 minutes, so that the graphite conductive powder is evenly dispersed in the deionized water On the surface, a dense graphite film with a thickness of about 20 μm is formed;

[0039] Step 3: Put the flexible substrate described in step 1 under the graphite film on the surface of the graphite powder suspension described in step 2, and then pull it upwards so that the graphite film is combined with the flexible substrate. Repeat this step 7 times to obtain the thickness A conductive film of about 110 μm, i.e. a strain-sensiti...

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Abstract

The invention belonging to the technical field of sensors provides a low-cost high-performance human motion sensor and a preparation method thereof. The sensor comprises a stretchable flexible substrate, a strain sensitive material arraigned on the stretchable flexible substrate and wires arranged at two ends of the strain sensitive material. The motion sensor has the advantages of simple operation, simple process, low cost and good performance and can be worn on the surface of human skin; the motion situation of the body can be detected based on the strain response; and application needs of human body motion detection and intelligent auxiliary medical service and the like can be met.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a low-cost, high-performance human motion sensor and a preparation method thereof. Background technique [0002] A strain sensor is a sensor based on measuring the strain generated by the deformation of an object under force. The principle is to use resistance strain gauges to convert strain into resistance change for measurement. Most of the traditional strain sensors are based on metal and semiconductor materials. Due to their portability, flexibility and wearability, they cannot be carried around and are not convenient for detecting human activities, which greatly limits the application range of sensors. As a wearable device, flexible sensors can be used to detect various human physiological activities, including small-scale activities such as breathing, pulse, swallowing, muscle vibration during vocalization, blood pressure, etc., and can also be used to detect finger moveme...

Claims

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Application Information

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IPC IPC(8): G01B7/16
CPCG01B7/16
Inventor 顾有松韩朝阳
Owner UNIV OF SCI & TECH BEIJING
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