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Surface acoustic wave (SAW) devices have been shown recently to be an appropriate technology for harsh-environment sensor applications, such as those in the automotive, aerospace, power plant, and metallurgic industries. Usages include temperature, pressure, torque, strain, gas, liquid, biochemical, and mass sensors in structural health monitoring, industrial process monitoring, environment checking...
Industrial monitoring and process control, power plants, aerospace industry, military equipment manufacturing, oil and gas industries are examples of businesses in need for high-temperature and harsh-environment electronic components and systems. In particular, resonators and filters that operate beyond the 125°C military range upper limit, normally dictated by silicon-based semiconductor devices,...
Strain sensors are used to guarantee integrity, safety, and appropriate maintenance in a multitude of applications such as civil structures, industrial equipment, and aircrafts. In harsh environments associated with power plants, aerospace, oil drilling, and industrial processes, there is a pressing need for robust, reliable, small footprint strain sensors, which can operate wirelessly, battery-free,...
The operation of a wireless sensor based solely on the radio frequency (RF) signal received, i.e., under no constraint of battery or alternate power source is very attractive for multiple industrial, aerospace and military applications. Above a few hundred °C, battery and energy scavenging schemes pose serious challenges regarding sensor system implementation and performance, thus increasing the interest...
This paper reports on novel Pt-Ni / Pt-Zr alloy thin film electrodes for use in high-temperature harsh-environment surface acoustic wave (SAW) devices and sensors. Together with other protective thin film layers, which include capping, adhesion, and interfacial layered structures, the Pt-Ni / Pt-Zr film configuration allowed stable SAW device operation for over 300 hours of thermal cycling and soaking...
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