低功耗自动监测设备在施工过程监测中的应用

Application of Low Power Consumption Automatic Monitoring Equipment in Construction Process Monitoring

对施工期结构监测需求进行了分析,结合当前无线应变监测设备特点,提出了应力监测设备低功耗监测的研发目标。基于具有远距离传输和低功耗特点的远程无线电(LoRa)传输模式,建立了采集终端+网关的总体传输架构。在LoRa设备自身低功耗的基础上,采用空中唤醒机制和优化的振弦激励方式,大幅降低振弦式应变监测设备在数据采集和传输过程的功耗。针对施工期结构监测容易受到干扰的特点,设计了采集终端和网关的双储存和接通重发机制,保证了特殊情况下数据采集的完整性。两个工程的示范应用,证明所研发的设备在功耗、传输距离、稳定性和可靠性上能够满足结构应力监测的需求,尤其适用于施工期应力监测。

Based on the analysis on the structural monitoring requirement during the construction period and the characteristics of current wireless strain monitoring equipment,the research and development target of low power monitoring of stress monitoring equipment is proposed.Based on the transmission mode of LoRa with the characteristics of long distance transmission and low power consumption,the overall transmission architecture of acquisition terminal+gateway is established.Based on the low power consumption of LoRa equipment,the air wake-up mechanism and optimized vibrating wire excitation mode are adopted to greatly reduce the power consumption of vibrating wire type strain monitoring equipment in the process of data acquisition and transmission.According to the characteristics of the structure monitoring easy to be disturbed in the construction period,the dual storage and connection retransmission mechanism of the acquisition terminal and gateway is designed to ensure the integrity of data acquistion under special conditions.The demonstration application of two projects proves that the developed equipment can meet the requirements of structural stress monitoring in terms of power consumption,transmission distance,stability and relbilt,which is especially suitable for stress monitoring during construction.