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Vol. 106, Issue 7, July 2009, pp.1-5





Wireless Surface Acoustic Wave Sensors


Kerem Durdag

Director of Sales and Marketing, SenGenuity, a Division of Vectron International

267 Lowell Road, Hudson, NH 03051, USA

Tel.: 1-603-578-4066, fax: 1-207-856-2889




Received: 12 May 2009   /Accepted: 15 July 2009   /Published: 20 July 2009


Abstract: Acquiring temperature measurements from rotating machine components using conventional methods can be costly and technically challenging. Solutions involving thermocouples often include elaborate coupling mechanisms to ensure continuity of contact between the rotating thermocouple and the measuring instrument. Infrared thermal measurement solutions, while extremely accurate, do not afford the ability to measure temperature at critical and targeted locations on the rotating structure. The advent of wireless batteryless sensing using surface acoustic wave (SAW) technology holds the promise of providing cost effective and elegant solutions to the challenges posed by rotating machine components. Through use of independent frequency bands the sensors maintain unique identification within the system architecture. Further, passively powered SAW temperature sensors that do not need either an external power supply or batteries provide the added benefit of a low maintenance and environmentally friendly temperature measurement solution.


Keywords: Wireless passive temperature sensors, Batteryless temperature sensors, SAW sensors


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