Abstract
We propose the rising detection reporting device which can be installed in the middle-small facilities and ordinary houses. This device combines a mat sensor which detects rising and a power line communication (PLC) device as a reporting system. This device does not need any additional construction for installation as long as the facility equips electric power supply 100V for ordinary business. At first, the mat sensor in the system detects rising of a elderly person or lying down to the bed. The PLC system sends on/off signal and reports to nurses and caring people in the management room. Since the main objective of the PLC system is exact detection and transmission of the mat-sensor on/off signal, high-speed network is not necessary. It is required that the system should be robust to noises of household electrical appliances. We used the multi-career method as a transmission method in which we located 2 lines of tone frequency (115KHz and 132 KHz) for the power line transmission in the device. The effectiveness of the proposed device has been confirmed by the field experiments in welfare facilities for the elderly people.
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