基于PSD的水利工程变形监测系统设计及室内检验

Design and indoor inspection of hydraulic engineering deformation monitoring system based on PSD

为高精度实现水利工程变形测量,设计一套基于PSD的变形监测系统。将激光器安装在水利工程易出现变形的位置上,通过实时观察照射在PSD表面的光斑位置变化,测出水利工程水平和竖直方向的微位移。对PSD输出的信号进行处理,利用单片机对转换后的4路信号进行位置计算,并用遗传算法与LM-BP神经网络法相结合的模型对PSD进行非线性校正,将位置结果显示在数码管和系统界面上。监测系统在模拟水利工程环境的室内已检验设计功能,同时PSD作为新型传感器,分辨力高,信号处理简单,可代替其他监测设备广泛用于水利工程的变形监测。

In order to achieve high-precision measurement of hydraulic engineering deformation,a set of deformation monitoring system based on PSD is designed.The laser lights are installed on the sites where prone to be deformed.Based on observation of real-time change of spot position on PSD surface,the micro displacement of the hydraulic engineering in the horizontal and vertical directions can be detected.The system processes the micro signal from PSD,and calculates the position of four-channel signals by single chip microcomputer.Then,a model combining genetic algorithm and LM-BP neural network method is applied to achieve the nonlinearity correction of PSD.The position results can be displayed on the digital tube and system interface.The monitoring system has realized the designed function in the indoor inspection laboratory simulating the environment of hydraulic engineering.In addition,as a new sensor with high resolution and simple signal processing,PSD can be widely applied for deformation monitoring of hydraulic engineering and replace the other monitoring equipments.