低功耗机械振动无线传感器网络节点结构设计

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (14) : 33-37.

论文

曾超1，汤宝平1，肖鑫1, 陈天毅2

作者信息 +

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

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

Author information +

文章历史 +

摘要

针对目前机械振动无线传感器网络节点能耗高的问题，提出一种低功耗节点硬件结构设计方法。采用低功耗、高灵敏度MEMS加速度传感器采集机械振动信号，简化电源及调理电路；采用通带可调的开关电容低通滤波器，实现低功耗动态抗混叠滤波；在充分考虑存储速度的前提下，采用低读写电流的外部Flash存储芯片实现连续、高速数字信号流的存储；采用片上系统级芯片作为整体控制核心，集采集、存储、无线传输于一体，在保证机械振动信号采集性能的同时，极大的减小节点体积与功耗。对比实验结果表明基于该低功耗硬件结构的机械振动无线传感器网络节点具有较低的功耗水平。

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.

导出引用

曾超1，汤宝平1，肖鑫1, 陈天毅2. 低功耗机械振动无线传感器网络节点结构设计[J]. 振动与冲击, 2017, 36(14): 33-37

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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