A multifunctional flexible stress sensor

A stress sensor and multi-functional technology, applied in the field of stress sensors, can solve problems such as single function, inability to quantitatively analyze complex stress, etc., and achieve the effects of simple preparation process, simple structure and preparation method, and simple conversion output method.

Inactive Publication Date: 2020-11-10
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problem that the existing flexible stress sensor has a single function and cannot quantitatively analyze complex stress, the present invention proposes a multi-functional flexible stress sensor, which can detect multi-axis complex stress and has the function of detecting multiple stress modes. The signal and stress conversion output method is simple, and it also has the advantages of water resistance and various chemical reagents, light weight and small size; in addition, the multifunctional flexible stress sensor has a simple preparation process and has a good application prospect

Method used

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  • A multifunctional flexible stress sensor
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  • A multifunctional flexible stress sensor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The elastic polymer 3 and the brittle polymer anisotropic conductive composite film 1 are squares of 30×30 mm and 20×20 mm respectively, and the former completely covers the latter, and their thicknesses are 2000 μm and 18 μm respectively. The degree of electrical anisotropy of the brittle polymer anisotropic conductive composite film 1 is 6.7, and the electrical conductivity in the main direction is 187 S / cm. The distance between the upper brittle polymer conductive composite film 11 and the upper surface of the elastic polymer 3 is 1000 μm. The resistance between the first conductive glue 21 and the second conductive glue 22 is denoted as R 1 , the resistance between the third conductive glue 23 and the fourth conductive glue 24 is denoted as R 2 . The pressure (P) and R on the sensor 1 and R 2 The relative change value (ΔR i , i=1, 2) The logarithm of the difference is linear, such as Figure 4 As shown, the regression equation is P=5.63lg(ΔR 1 -ΔR 2 )-8.40, ...

Embodiment 2

[0051] The elastic polymer 3 and the brittle polymer anisotropic conductive composite film 1 are circular with diameters of 15 mm and 10 mm respectively, and the former completely covers the latter, and their thicknesses are 1000 μm and 5 μm respectively. The electrical anisotropy value of the brittle polymer anisotropic conductive composite film 1 is 5, and the electrical conductivity in the main direction is 1000 S / cm. The distance between the upper brittle polymer anisotropic conductive composite film 11 and the upper surface of the elastic polymer 3 is 800 μm. The resistance between the first conductive glue 21 and the second conductive glue 22 is denoted as R 1 , the resistance between the third conductive glue 23 and the fourth conductive glue 24 is denoted as R 2 . Bending the sensor, the bending angle (θ) is the same as R 1 and R 2 The logarithm of the ratio of the relative change value is linear, such as Figure 5 As shown, the regression equation is θ=-16.4lg(ΔR...

Embodiment 3

[0053] The elastic polymer 3 and the brittle polymer anisotropic conductive composite film 1 are irregular in shape and a regular triangle with a side length of 10 mm, and the former completely covers the latter, and their thicknesses are 1500 μm and 10 μm, respectively. The electrical anisotropy value of the brittle polymer anisotropic conductive composite film 1 is 3, and the electrical conductivity in the main direction is 2000 S / cm. The distance between the upper brittle polymer anisotropic conductive composite film 11 and the upper surface of the elastic polymer (3) is 500 μm. The resistance between the first conductive glue 21 and the second conductive glue 22 is denoted as R 1 , the resistance between the third conductive glue 23 and the fourth conductive glue 24 is denoted as R 2 . Pressure on the sensor (P) and R 1 and R 2 The logarithm of the difference between the relative change values ​​is linear, such as Image 6 As shown, the regression equation is P=-17.65...

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Abstract

The invention discloses a multifunctional flexible stress sensor, which includes a brittle polymer anisotropic conductive composite film, a wire and an elastic polymer. The elastic polymer embeds thebrittle polymer anisotropic conductive composite film with conductive adhesive attached, and the elastic polymer is exposed at one end, not in contact with the brittle polymer anisotropic conductive composite film, of the conductive adhesive. The brittle polymer anisotropic conductive composite film and the elastic polymer are in close contact without gaps. The multifunctional flexible stress sensor of the invention can detect multi-axis complex stress, has the function of detecting multiple stress modes, and has the advantages of resistance to water and various chemical reagents, low weight,small size and the like. In addition, the multifunctional flexible stress sensor has a simple preparation process and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of stress sensors, in particular to a multifunctional flexible stress sensor. Background technique [0002] With the rapid development of artificial intelligence, flexible electronics has increasingly broad application prospects in the fields of information, energy, and medical care. The flexible stress sensor converts the deformation of the sensor into the change of resistance value to obtain the stress it receives. However, the existing flexible stress sensors often have a single function, for example, they can only measure the magnitude of stress in a known direction. For the identification of some complex stresses, such as muscle movements and joint movements such as human body bending and walking, the movement pattern is often recorded based on the series of changes in the resistance value caused by this particular movement, and it is difficult to obtain and realize this movement process. The specific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/22
CPCG01L1/22
Inventor 方芳彭飞詹自力
Owner ZHENGZHOU UNIV
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