一种超低功耗自守时环境监测模块的设计

Design of an Ultra-Low-Power Self-timed Environmental Monitoring Module

摘要:

装备在使用、运输、贮存等条件下，所处环境对其状态和寿命具有明显影响；为实现对装备的使用、运输、贮存环境参数的连续、长时监测，以为其全寿命周期健康管理提供原始数据，设计了一种超低功耗自守时环境监测模块；给出了环境监测模块的系统架构以及基本功能单元，主要包括存储电路、主控电路、授时电路、传感器电路和电源电路；环境监测模块实现-40~60℃温度、0~100%湿度、0.3~1.1bar压力以及-16~+16g振动等环境监测数据的采集，并进行本地数据缓存，数据采集周期可灵活设置，采集后存储在本地的数据通过网络接口对外传输，传输速率可达100MB/s；环境监测模块可通过北斗系统进行授时，并在本地实时时钟支持下自主守时；系统上包括网口在内的外设电路可在主控电路的控制下实现上电和下电操作；在低功耗模式下，主控电路可通过定时唤醒和加速度传感器的外部中断唤醒。

Abstract:

Under the conditions of use, transportation, and storage of equipment, the environment has a significant impact on their status and life. In order to achieve continuous and long-term monitoring of environmental parameters for the use, transportation, and storage of equipment, to provide original data for its full-life-cycle health management, an ultra-low power consumption self-timed environmental monitoring module is designed. The system architecture and basic functional units of the environmental monitoring module are given, including storage circuits, main control circuits, timing circuits, sensor circuits and power circuit. Environmental monitoring module realizes the collection of environmental monitoring data such as -40~60℃ temperature, 0~100% humidity, 0.3~1.1bar pressure and -16~+16g vibration, and carries out local data cache. The data collection period can be set flexibly. After collection, the data stored locally is transmitted to the outside through the network interface, the transmission rate can reach 100MB/s. The environmental monitoring module can provide time service through Beidou system and keep time independently with the support of local real-time clock. Peripheral circuits in the module including network ports can realize power-on and power-off operations under the control of the main control circuits. In the low-power mode, the main control circuits can be awakened by timing wake-up and/or external interrupts of the acceleration sensor.