INKtelligent printed strain gauges

Sensor structures for non-destructive testing could successfully deposited by INKtelligent printing. Metal strain gauges are fabricated by Aerosol Jet technology, starting with deposition of a polymer isolation layer, followed by a printed metal layer and at least an encapsulation to protect the printed sensor. Characterizations of printed and sintered sensors show a good densification of the porous material which allows high electrical conductivity up to 70 % of bulk value. Performance tests of printed sensors show a reproducible and reliable functionality in terms of strain measurements.