Low power architecture design method of mechanical vibration wireless sensor networks node

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (14) : 33-37.

ZENG Chao1，TANG Bao-ping1，XIAO Xin1，CHEN Tian-yi2

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Abstract

Aiming at the problem of the high energy consumption of current mechanical vibration wireless sensor networks node, a low power architecture design method is proposed. A low power, high sensitivity MEMS accelerometer is adopted to pick up mechanical vibration signal, which simplifies power and conditioning circuit; a switched capacitor low-pass filter with adjustable passband is adopted to realize dynamic anti-aliasing; a Flash storage chip with low operating current is adopted to store the continuous, high-rate digital signal stream, which takes into full consideration of the storage speed. A SOC is adopted to act as the whole control core, which controls the acquisition, storage, wireless transmission process. Besides ensuring the mechanical vibration signal acquisition performance, the SOC greatly reduces the nodal size and energy consumption. The energy consumption comparison between the proposed low power architecture and a typical dual-core-processor architecture is conducted, and the experiment results indicate that mechanical vibration wireless sensor networks node based on the proposed low power architecture has low energy consumption.

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machine vibration monitoring / wireless sensor networks / low energy consumption / architecture

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ZENG Chao1，TANG Bao-ping1，XIAO Xin1，CHEN Tian-yi2. Low power architecture design method of mechanical vibration wireless sensor networks node[J]. Journal of Vibration and Shock, 2017, 36(14): 33-37

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