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Tham khảo tài liệu 'wireless sensor networks part 14', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 318 Wireless Sensor Networks Fig. 12. Two simulation scenarios by using sensor node arrays with different distances. 6. Conclusions A wireless network physiological signal and field signal monitoring systems in homecare technology and precision agriculture were proposed in this chapter. We have finished monitoring physiological signals such as heart rate ECG and body temperature as well as temperature and moisture in air and soil CO2 and illumination signals in the field. We used Bluetooth technique to solve wireless transmission problem and to finish physiological signals transceiver between mobile unit and Web server that might be useful in replacing cables of physiological signal monitoring system. Additionally we also used ZigBee technique to finish field signals transceiver between acquiring unit and Web server that might be useful for field signal monitoring. Most of healthcare-monitoring and field-monitoring systems applications use mobile device and PC as main monitoring device in their system. We used an SOC platform as the Web server that can effectively to reduce cost and the physical size significantly. Because of the popularization of the internet that displays the physiological and field signal values on the Web page in real-time through RJ-45 of SP3 platform the doctors or patient s family can easily take care of the patient s health status while the researchers or farmers can easily look out of the product s status in the precision agriculture anytime and any place through the Web page. Additionally we also embedded the faulty sensor detection algorithm into sensor nodes on the two simulation fields and obtain feasible faulty sensor detection accuracy. Although the fault detection algorithm can be implemented in the wireless sensor networks on the field to detect the faulty sensor nodes we are still persecuted by the power supply with batteries for the sensor nodes. Low power consumption is one of the advantages of the Zigbee networks but we must .