关键词: 单片机 加速度传感器 无线传感器节点 超低功耗

Abstract:

The paper introduces the ultralow-power hardware design of wireless sensor nodes for online oscillation signal detection and analysis. The sensor node  is based on the ultralow-power microcontroller MSP430F135 ,and is composed of the RF communication mode,the accelerometer and the signal conditioning c ircuit. We focus on the design method by using an integrated accelerometer to detect online oscillation signals in the ultralow-power mode, the working style of each module in the system （which includes the mode and sequence）which makes the nodes satisfy the ultralow-power and detection performance reequirements and the power management measures. The aim is not only to make nodes satisfy the online real-time detection and signal transmission requirrn ents, but also to make the average power of wireless sensor nodes meet the performance and life cycle standard by battery power supply.

Key words: microcontroUer, accelerometer, wireless sensor node, ultralow-power