低功耗机械振动无线传感器网络节点结构设计

发布时间：2018-02-02 08:47

本文关键词： 机械振动监测无线传感器网络低功耗硬件结构　出处：《振动与冲击》2017年14期 　论文类型：期刊论文

【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 high energy consumption of nodes in mechanical vibration wireless sensor networks, a low power node hardware structure design method is proposed. High sensitivity MEMS accelerometer collects mechanical vibration signals, simplifies power supply and conditioning circuit; Low power dynamic anti-aliasing filter is realized by using switched capacitor low-pass filter with tunable passband. On the premise of fully considering the storage speed, the external Flash memory chip with low read / write current is used to realize the storage of continuous and high speed digital signal stream. The system-level chip on chip is used as the whole control core, which gathers, stores and transmits wirelessly, which ensures the performance of mechanical vibration signal acquisition at the same time. The experimental results show that the mechanical vibration wireless sensor network nodes based on the low power hardware structure have lower power consumption level.
【作者单位】：重庆大学机械传动国家重点实验室;中国空气动力研究发展中心4所;
【基金】：国家自然科学基金(51375514) 国家重点基础研究发展计划(973计划)(2015CB057702)资助项目
【分类号】：TN929.5;TP212.9
【正文快照】： 无线传感器网络(Wireless Sensor Networks,WSNs)在许多领域有着广阔的应用前景[1-3],可弥补有线机械设备状态监测系统在某些应用中的局限性,如密封环境中轴承、齿轮等机械旋转构件的振动监测[4]。相较于结构健康监测等应用[5-6],机械振动无线传感器网络性能需求更高。譬如,更

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