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This paper presents a method based on RF detection for wireless and passive LC sensors. A square pulse excitation and a structure of two inductors in the series connection with opposite phases are adopted to receive excitation signals efficiently and achieve a high signal-to-noise ratio. The method is implemented by a detection circuit based on FPGA and verified by a test system. Experimental results...
In these years, disasters often occurred in Japan and abroad. When the disaster happen, general communication methods, e.g., cell phone, may not work well due to the damage of communication infrastructure or restriction of usage of communication resources. How to let users quickly confirm safety is a critically important problem after a disaster. Therefore, we propose a design of safety confirmation...
Localization is one of key technologies in Internet of Things (IoT) and Wireless Sensor Network (WSN). Various applications have been proposed based on it, e.g. location-aware services. Currently, there are many approaches to locate a person, e.g. based on GPS, RFID, ultrasonic signal etc based on various methods, e.g. TOA, TDOA, AOA, RSSI etc. However, when an earthquake happens, the localization...
We study data fusion in sensor networks using mobile agents (MAs),which are capable of saving energy of sensor nodes and performing advanced computation functions based on the requests of various applications. Research on MAs still remains unfledged in development of application-oriented data fusion, which is highly desired in wireless sensor networks (WSNs) deployed in recent days for environmental...
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