Understanding Smart Sensors - Nomads.usp

Transceivers, Transponders, and Telemetry 197need to communicate the results of sensed parameters or acquired data will notwant to be connected by wires to a distributed system. Home, office, andindustrial monitoring systems are easier to implement using RF signal transmissionthan using hardwired installations, even with simple two-wire systems.Also, several hazardous monitoring situations require sensing and transmittingof data to minimize exposure of humans to toxic material. The combination ofwireless technology with MEMS technology is part of an exciting new area forsmart sensors.References[1] Frank, R., “Improved Portable Communications Through Low Voltage Silicon Design,”Portable by Design Conf., Santa Clara, CA, Feb. 14–18, 1994, pp. PC23–PC34.[2] Vilbrandt, P., “Wireless Data Communications,” Sensors, May 1993, pp. 19–21.[3] Gaston, D., “Spread Spectrum Systems: Evaluating Performance Criteria for Your Application,”Proc. Second Annual Wireless Symposium, Santa Clara, CA, Feb. 15–18, 1994,pp. 489–507.[4] 1994 Motorola Communications Resource Guide, BR1444/D, Motorola, Inc.[5] Leonard, M., “Digital Domain Invades Cellular Communications,” Electronic Design,Sept. 17, 1992, pp. 40–52.[6] Phillips, B., “Pumping Data Into Cellular,” OEM Mag., Sept. 1994, pp. 32–41.[7] Mathews, D. J., and C. L. Fullerton, “Microwave Local Area Network for the ComputerOffice,” Applied Microwave, Winter 91/92, pp. 40–50.[8] Nass, R., “Error-Free Wireless Data Transmission Can Be Embedded in a PCMCIACard,” Electronic Design, Dec. 5, 1994, p. 48.[9] Alexander, J., R. Aldridge, and D. O’Sullivan, “Wireless Zone Sensors,” Heating/Piping/AirConditioning, May 1993, pp. 37–39.[10] “Wireless Data Loggers Help Pinpoint Cleanroom Humidity Fluctuations,” Microcontamination,Aug. 1994, p. 36.[11] Elachi, C., Spaceborne Radar Remote Sensing: Applications and Techniques, New York:IEEE Press, 1988.[12] Frye, G. C., et al., “Controlled Microstructure Oxide Coatings for Chemical Sensors,”IEEE Solid-State Sensor and Actuator Workshop, Hilton Head, SC, June 4–7, 1990, pp.61–64.[13] Ajluni, C., “Low-Cost Wideband Spread-Spectrum Device Promises to RevolutionizeRadar Proximity Sensors,” Electronic Design, July 25, 1994, pp. 35–38.[14] “Microwave Sensors,” Measurements & Control, Dec. 1992, p. 173.