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NASA aeronautical programs require rigorous ground and flight testing. Many of the testing environments can be extremely harsh. These environments include cryogenic temperatures and high temperatures (>1500 °C). Temperature, pressure, vibration, ionizing radiation, and chemical exposure may all be a part of the harsh environment found in testing. This paper presents a survey of research opportunities...
Surface acoustic wave (SAW) strain sensors are presented for use in the detection of aircraft fastener failures. SAW sensors have the potential for the development of passive wireless systems. The SAW devices employed four orthogonal frequency coding spread spectrum reflectors in two banks on a high temperature piezoelectric substrate. Three SAW devices were attached to a cantilever panel with removable...
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