基于FPGA的基坑实时自动报警装置的设计

随着城市建设的迅猛发展,城市基坑工程高速发展,基坑事故的发生日渐频繁,这便对基坑实时状况的监测和自动报警提出了越来越高的要求。针对以往基坑监测中实施的人工监测、人工计算、人工报警等导致险情误报和延报的问题,提出了一种基于AD7670和EP4CE6F17C8的基坑自动报警装置的设计。该设计给出了基坑自动报警装置的总体设计方案,并对硬件电路、软件程序、滤波算法等部分进行了详细的描述。经试验表明,该基坑自动报警装置能对基坑位移倾斜值进行有效的测量,误差在5%以内,满足了建筑基坑工程检测技术规范中的要求,并能实现实时报警。

Designer of real time automatic alarm device in foundation pit based on FPGA

As the rapid development of cities, foundation pit engineering develops quickly with more requirements to the real time monitoring of foundation pit and its automatic alarm device. Based on AD7670and EP4CE6F17C8, this paper designs an automatic alarm device of foundation pit in order to avoid false or delayed alarm to dangerous condition caused by manual monitoring, calculation and alarm. The paper firstly make a general design scheme about automatic alarm device to foundation pit and then offer detailed introductions to its related hardware design, program and filtering algorithm. The results show that effective measurement to tilting value of foundation pit is achievable with errors within 5% basically satisfying technical specification of foundation pit engineering and the real time alarm is workable for this automatic alarm device.