Unpowered Wireless Transmission of Ultrasound Signals from Multiple Sensor Nodes
Conference: Publication Date: 16 March 2015Testing Method:
This paper presents an unpowered wireless sensor network that simultaneously transmits the high frequency ultrasound signals from two sensor nodes. Each of the structures under inspection is equipped with one piezo-sensor, which is connected to a passive wireless transponder. The wireless communication is performed by implementing the frequency conversion principle, which modulates the ultrasound signal output from the piezo-sensor to microwave frequency without consuming any power. The system is designed to work with two communication channels, each of which is dedicated to one piezo-sensor and is identified by the operating frequency. Upon received by the Wireless Interrogation Unit (WIU), the signals for each channel are separated by filtering and the ultrasound signals are recovered by demodulation. In this way, each wireless sensor node can operate as a stand-alone senor without any local power source while the power hungry time-synchronization of the ultrasound signals is done at the WIU.
- Raghavan, A. and Cesnik, C. E. , "Review of guided-wave structural health monitoring," Shock Vib Dig 39(2), 91-116 (2007).
- Kessler, S. S., Spearing, S. M. and Soutis, C. , "Damage detection in composite materials using Lamb wave methods," Smart Mater.Struct. 11(2), 269 (2002).
- Kim, S., Pakzad, S., Culler, D., Demmel, J., Fenves, G., Glaser, S. and Turon, M., "Health monitoring of civil infrastructures using wireless sensor networks," Information Processing in Sensor Networks, 2007. IPSN 2007. 6th International Symposium on, 254-263 (2007).
- Lynch, J. and Loh, K. , "A Summary Review of Wireless Sensors and Sensor Networks for Structural Health Monitoring," The Shock and Vibration Digest 38(2) (2006).
- Huang, H., Paramo, D. and Deshmukh, S. , "Unpowered wireless transmission of ultrasound signals," Smart Mater.Struct. 20(1), 015017 (2011).
- Zahedi, F. and Huang, H. , "A wireless acoustic emission sensor remotely powered by light," Smart Mater.Struct. 23(3), 035003 (2014).
- Federal Communications Commission , "Understanding the FCC Regulations for Low-Power, Non-Licensed Transmitters," Office of Engineering and Technology 34 (1993).
- Balanis, C. B., [Antenna Theory: Analysis and Design, 3rd Edition], John Wiley & Sons, Inc, Hoboken, New Jersey (2005).
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