为解决水利工程施工过程中大坝安全监测信息采集的实时性及非接触性问题,设计研发了一种基于无线网络的振弦式传感器微功耗测读系统。该系统由前端采集器及手持机2部分组成, 将该系统与BGK-408型读数仪在压力试验台上施加相同压力测试时所测读的频率进行比对分析,结果表明:两者所测频率平均值的绝对误差<0.25 Hz,系统采集精度达到设计要求,满足实际工程需要。该系统实现了大坝安全监测数据远距离采集(可达100 m距离)、传输、存储及分析和整理等功能,能实时跟踪大坝监测数据的动态变化,很好地解决了传统有线测量系统和其他无线测量系统在大坝施工期无法完成的对监测数据的实时、快速监测要求。具有测量精度高、功耗低、性能稳定、使用方便、安装灵活、减轻使用者劳动强度、建设和维护成本低及现场适应能力强等特点。

In order to solve the real-time and non-contact problems in collecting dam safety monitoring information during the construction of water conservancy project, a micro-power measurement system of vibrating wire sensor based on wireless network is developed. The system consists of two parts: the front collector and the handset. By applying the same pressure on test table, we compare the frequencies measured by this system and BGK-408 Reader. Results show that the absolute error of measured mean frequencies between the two measurement systems is less than 0.25 Hz,which proves that the collection accuracy of this developed system meets design requirements and practical engineering needs. The system has functions of remote collection (more than 80m), transmission, storage and analysis of monitoring data for dam safety. It can instantly track the dynamic changes of monitoring data for dam safety, and well meets the real-time demands for the monitoring data, which cannot be satisfied by traditional wire measurement systems and other wireless measurement system during construction. The system is of high measurement accuracy, low power consumption, stable performance, convenient application, flexible installation, low labor intensity for its users, low construction and maintenance cost and strong in-spot adaptive ability.