| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 100 === An emergency E-Nurse system based on of Doppler radar, phased array antenna and wireless LAN techniques was developed in this thsis. The Emergency E-Nurse system provides three functions: noninvasive vital-sign detection, wirless indoor positioning, and outdoor global positioning. The system is composed of three modules: wearable E-Nurse card, positioning reader, and handheld mobile device. The wearable E-Nurse card, containing of the vital Doppler radar sensor, embedded microprocessor and wireless LAN, perform the noninvasive heartbeat and breath rate measurement. The transmitted signal from E-nurse card received for indoor positioning by the positioning reader. The E-nurse card is also linked to the handheld mobile device for outdoor positioning through the GPS function.
The two-dimensional indoor positioning was tested in two environments with different levels of multipath distortion, including unfurnitured (6.45m x 6.75m) and a furnitured household ( ) room, respectively. The root-mean-square error is 22cm in the unfurnitured room and is 35.2cm in the furnitured room. The updated rate is 20 times and 40 people can be tracked at the same time.
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