No abstract

This paper presents, for the first time, an instrumentation technique for passively extracting a resonance frequency of a high-Q resonator across a wireless ultrasonic channel. As a first application, passive wireless measurement of temperature is presented along with a proof of concept of the wireless and passive operation of the device. Temperature resolution of 0.17 °C and a measurement range of 350 mm has been demonstrated.

In this contribution, we propose an energy-autonomous wireless sensor node for monitoring wind turbine blades. To allow a placement of the sensor node on the leading edge of the wind turbine blade with minimal influence to its performance, the electronics have to be ultra-thin and mechanically flexible. The concept of the sensor system is presented with a main focus on the eigenfrequency analysis of the rotor blade based on MEMS accelerometers. The sensor system is demonstrated on a smallscale wind turbine blade with a length of 1.07 m.

No abstract

No abstract