Elastic resistance strain piece and preparation method thereof

Abstract

The invention discloses an elastic resistance strain piece and a preparation method thereof. The elastic resistance strain piece is high in consistence of tensile properties and stress variations, good in adsorption property, capable of reducing drifting and errors while the rebound resilience of the strain piece self is reduced, relatively small in temperature influence and relatively high in stability. The elastic resistance strain piece comprises a non-conductive macromolecule layer and a conductive macromolecule layer, wherein the non-conductive macromolecule layer is made of a first elastic macromolecule composite material; the conductive macromolecule layer is made of a second elastic macromolecule composite material; the second elastic macromolecule composite material is made of thefirst elastic macromolecule composite material and conductive packing; the first elastic macromolecule composite material is a macromolecule composite material which can form a stable surface after being cured; and the conductive macromolecule layer is cured on the surface of the non-conductive macromolecule layer.

Description

technical field [0001] The invention relates to the technical field of resistance strain sensing measurement, in particular to an elastic resistance strain gauge and a preparation method thereof. Background technique [0002] Resistance strain gauges are a common sensing element. When the tensile force, pressure, torque, displacement, acceleration, temperature and other physical quantities of the resistance strain gauge change, its resistance will also change accordingly. By measuring and outputting its resistance, the measured value of the corresponding physical quantity can be obtained. . [0003] Common resistance strain gauges in the prior art include metal strain gauges and semiconductor strain gauges. The metal strain gauge is made of constantan wire or nickel-chromium wire wound into a grid shape, or etched into a grid shape with a very thin metal foil and sandwiched between two layers of insulating sheets, and then connected to the strain gauge wire grid with silve...

AI Technical Summary

Problems solved by technology

This scheme combines the graphene film layer on the substrate by means of attachment. Due to the obvious difference in tensile properties and stress changes between the flexible insulating substrate and the graphene film layer, there is not only the problem of low accuracy of the measurement results caused by the difference in deformation. , and the measurement range of the whole device is limited by the graphene layer with smaller deformation

[0006] The Chinese invention patent application with the application publication number CN104538088A discloses a high-stretch conductive elastomer, although it uses surface modification technology to introduce aromatic groups on the surface of the elastomer to make the surface of the elastomer closely bonded to the graphene conductive layer. However, the close fit cannot fundamentally eliminate the difference in tensile properties and stress changes between the two, nor can it expand the range of deformation of the conductive layer.

Moreover, due to the instability of the graphene conductive layer and the small range of deformation, the above solutions are greatly affected by the application environment temperature, and there are technical problems such as drift of measurement results and large errors.

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