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该论文提出了一种具有通用片上参考的反向应答器阵列，用于无电池无线移动传感器网络。通过反向散射通信和片上参考，实现了旋转轴上传感器数据的无线传输，解决了传统有线连接的可靠性和维护问题。
A rotating shaft in a wheel, a motor and a turbine uses sensors to measure torque, vibration, and acceleration for better control and maintenance of a machine. Such data is currently acquired in a laboratory and utilized for tuning the machine. For adaptive control and failure prognosis in future, the data need to be collected by the sensors on the fly. Connecting the moving sensors by wire and a brush to a microcontroller leaves reliability issues due to mechanical wear and electrical noise. A wireless data link with small form factor and low maintenance cost is needed. Bluetooth consumes large power and requires external parts such as a battery and a crystal. RFID loses connectivity when the sensors move into the shadow of a radio wave from a transponder. Continuous sensing on all sides is needed as the direction to be sensed is not determined. Our proposal is illustrated in Fig. 11.7.1. A rotating shaft with sensors attached
Haruki Fukuda, Takahide Terada, Tadahiro Kuroda
Keio University, Yokohama, Japan