Stretch sensor based on flexible pressure sensitive element

Abstract

The invention discloses a tensile sensor based on a flexible pressure sensitive element. The tensile sensor based on the flexible pressure sensitive element comprises an upper conductive electrode, asensing medium layer and a lower conductive electrode. The sensing medium layer is obtained by the following steps that silver nano-conductor aqueous dispersion, aqueous acrylic resin, ethanol, polyvinylpyrrolidone, alkylphenol polyoxyethylene ether, polyethylene glycol p-isooctylphenyl ether, bismuth octoate and toluene diisocyanate are mixed, and ultrasonic dispersion is carried out to obtain amixed solution; and the mixed solution is injected into ethylene-vinyl acetate copolymer foam body, and the ethylene-vinyl acetate copolymer foam body injected with the mixed solution is immersed in the foam body. The pre-treated ethylene-vinyl acetate copolymer foam body is obtained by the following steps that the ethylene-vinyl acetate copolymer foam body is immersed in pretreatment liquid and stands still, and then the ethylene-vinyl acetate copolymer foam body is put into an oven for drying to obtain pretreated the ethylene-vinyl acetate copolymer foam body. The tensile sensor based on theflexible pressure sensitive element is bendable and resistant to bending and can sense slight pressure, has high sensitivity at higher pressure, devices with various sensitivities and measuring ranges can be conveniently designed, and the comprehensive accuracy is less than 0.2 % FS.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a touch sensor. Background technique [0002] Tactile sensing plays a very important role in the sensory system of robots. The tactile sense can perceive some surface characteristics and physical properties of objects: softness, hardness, roughness, size, shape, etc. According to the information provided by the tactile sensor, the robot can sense the target object for reliable crawling. The trend of tactile sensors is integration, miniaturization and intelligence. In order to accurately obtain tactile information and be applicable to surfaces of any shape, the tactile sensor is required to have a certain flexibility, so that it can be installed on surfaces of any shape to adapt to different robot applications, and can obtain three-dimensional contact force information, so that it can be more Hold the target object firmly and securely. [0003] The pressure sensor is an importa...

AI Technical Summary

Problems solved by technology

[0004] Existing pressure sensors are often not resistant to bending, and the sensitivity is not enough. The error of measuring pressure with the sensor of pressure-sensitive material will reach about 20%, and the measurement accuracy is poor. How to overcome the above technical problems and improve them has become an effort for those skilled in the art. direction

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