基于线阵CCD和CAN总线通信的引张线仪的设计与实现

引张线仪主要应用于大坝等水工建筑物水平位移的长期观测,目前大部分引张线仪都采用RS485的通信方式,将多个引张线仪通过RS485的方式连接,容易出现通信不稳定、易出错等情况,且现场需要通过笔记本电脑连接串口调试助手,按照引张线仪的通信协议编写通信指令才能读取采集数据,这对现场的安装及调试造成了较大不便.本研究研制的引张...

Design and Implementation of Wire Alignment Transducer Based on Linear Array CCD and CAN Field-bus Communication

Wire alignment transducer is mainly used for long-term horizontal displacement monitoring of hydraulic structures such as dams. At present, most of the wire alignment transducers adopt RS485 communication mode, which is unstable and error-prone. Field workers need to connect laptops and write communication instructions to collect instrument data, inconvenient to field installation and commissioning. The wire alignment transducer developed in this research adopts microprocessor and linear array CCD, hence is of high acquisition precision and no electrical drift. Bluetooth communication and mobile APP are used to solve the problems of field parameter configuration and real-time data collection. Moreover, CAN field-bus is used to ensure the reliability of network transmission. Moisture-proof shell and moisture removing measures guarantee the long-term continuous work in humid environment such as hydropower station.The developed wire alignment transducer overcomes many shortcomings of traditional transducer, and the established automatic acquisition system can provide technical support for the safe operation of dams and other projects.