Multiplexed, Wireless, and Passive Surface Acoustic Wave Sensors


This Webinar will discuss the operation and potential applications of wireless, multiplexed, surface acoustic wave (SAW) sensors. SAW sensors have been studied for many years, but recent work at UCF/KSC has led to multiplexing concepts that allow these sensors to be part of a wireless network.

RF pulses are sent to the sensors, which produce echoes that contain both the identity of the sensor as well as the parameter being measured. These sensors are passive, rugged, small, radiation resistant, and capable of operating over a wide temperature range. To date wireless SAW sensor systems have been demonstrated that monitor temperature, magnetic fields, hydrogen, and liquid presence while work is progressing on strain and pressure sensors. Uses range from monitoring gear temperature in an operational gear box to monitoring the level of cryogenic hydrogen, from measuring strain inside of cement to monitoring the temperature on objects on the surface of the moon.

Speaker Bios:

Donald C. Malocha
is currently a Pegasus-Professor in the Electrical and Computer Engineering Dept., University of Central Florida (UCF), Orlando. Don received a dual BS in electrical engineering (EE) and computer science (CS), an MS in EE, and Ph.D. degree in EE from the University of Illinois, Urbana.

He serves on the Technical Program Committees (TPC) of the IEEE International Ultrasonics Symposium, International Frequency Control Symposium, and has served on the TPC of the IEEE Microwave Theory and Techniques Symposium, and European Frequency and Time Forum.

Dr. Robert Youngquist
is the lead of the Kennedy Space Center Applied Physics Lab, a role that he has held for over 20 years. In this capacity he has worked to help solve a diverse set of problems arising from multiple programs and customers, but primarily has supported ground processing for the Space Shuttle.

Dr. Youngquist received his PhD in Applied Physics from Stanford University in 1984, taught and worked at University College London, and then joined the Kennedy Space Center in 1988. He has over 30 refereed journal publications and 19 patents granted.

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