基坑支护结构应力实时监测系统设计

Design of the Real Time Stress Monitoring System for the Supporting Structure of Foundation Pit

针对目前基坑支护结构应力监测系统存在的不足,设计了一种分布式采集系统。基于振弦式传感器,在硬件方面重点设计了该系统的激振电路、拾振电路、测频电路、温度调理电路及远程传输电路。充分利用微处理器技术、现代通信技术、计算机技术,在硬件的基础上对各电路进行了相应的软件设计。试验表明,该系统实现了对监测信号的多点采集、数据可靠传输、综合处理等功能,进而对基坑支护结构的状态做出正确及时的安全监测。

Aiming at the deficiency in existing stress monitoring systems for supporting structure of foundation pit, the distributed system has been designed. Based on the vibrating wire transducer, in hardware, the excitation circuit, vibration picking circuit, the frequency measurement circuit, temperature conditioning circuit and remote transmission circuit are designed emphatically. The microprocessor technology, modem communication technology, and computer technology are fully adopted. In addition, on the basis of hardware, relevant software is designed for various circuits. Through experimental verification, the functions of monitoring multiple points collected, reliable data transmission and comprehensive processing, etc. , are implemented, thus the status of the supporting structure of foundation pit can be properly and promptly safely monitored.