Design Of Automatic Monitoring System For Subsidence And Horizontal Displacement Of Dam

The dam is an important infrastructure project. The stable working of dam matters life and property safety of the local population. Therefore, it's extremely important to get the state parameters of dam timely. Traditional supervision on dam mainly relies on manual measurement or semi- automatic measuring instruments. These measures are usually poor in precision and take much time and energy. However, some new monitoring tools are limited by their high cost in the promotion of small reservoir monitoring project. Therefore, this thesis, combining the actual requirements of dam safety monitoring, designs a visual monitoring system for dam based on collimated laser and image processing technology. This system will realize the automatic remote monitoring on subsidence and horizontal displacement with fairly low cost.The system is consisted of three parts, namely base Station, the main station and the monitoring center. the base station is divided into two parts : image acquisition board and the control panel. image acquisition board formed by STM32F407 and OV2640 is mainly in charge of the supervision of horizontal displacement. The control panel, with STM8 L as its core, controls operation of the base station and is in charge of the wireless communication with the main station. To ensure the reliability of the internal communication of the system, the thesis designs a set of communication protocols used to in every part within the system. This monitoring system makes the laser device fixed on the datum point on the one side of the dam shoot collimated laser. The laser goes through a number of base stations fixed on the dam and leaves a light line on the cutting light bar of the base station. When the dam moves, the light line on the cutting light bar will change. After analyzing the characteristics of the light line through a series of image processing algorithms, the actual distance that the dam moves can be counted through the regular pattern of the changes of light lines. What's more, the system, through the design of hardware, realize the low-powered operation and burglar alarm function, to make sure its stable working with the power supply from solar cells and lithium batteries.In the end, after explaining the theory of design, the thesis finishes the hardware making and software programming of monitoring base station parts, and runs a test of the measuring function of the base station. The test shows that the measuring function of the base station can meet the requirements of monitoring the displacement of the dam well.