Strain sensor functioned with conductive particle-polymer composites
First Claim
1. Strain sensors wherein said strain sensor is formed in a sheet shape from composites, and said sheet shape strain sensor is fixed to an exterior of iron and iron-concrete structural products, said composites consisting of polymers and individual conductive particles dispersed in said polymers, and a strain of said composites causes changes in a distance between said conductive particles and a corresponding change in electric resistance of said composites so as to recognize values of said strain.
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Abstract
When conductive particles are dispersed beyond the percolation threshold, electric conductive paths are formed between the electrode by chains of particles contacting with each other between the electrodes. Elongation of this composite results in an increase in the gap distances between conductive particles. This results in the increase in the electric resistance of the composites. It is found that strain sensors can be made by the use of this nature. Strains of iron frames or iron-concrete are known by the change of electric resistance of the sensors which are set on a surface of the place to be monitored. Main fields of the application of the present sensors are safety monitoring systems for buildings, bridges, tunnels, dams, etc. The sensors are also applicable for tanks of chemicals, aircraft, ships and mega-floats.
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Citations
9 Claims
- 1. Strain sensors wherein said strain sensor is formed in a sheet shape from composites, and said sheet shape strain sensor is fixed to an exterior of iron and iron-concrete structural products, said composites consisting of polymers and individual conductive particles dispersed in said polymers, and a strain of said composites causes changes in a distance between said conductive particles and a corresponding change in electric resistance of said composites so as to recognize values of said strain.
Specification