Design And Implementation Of Embedded System For Slope Safety Monitor

With the development of 32-bit microprocessor and maturity in embedded real-time operating system environment, all kinds of new embedded devices has become extensively useful in our day to day life as well as industrial production. An embedded system, used for slope safety monitoring, is developed because of the real necessity of project. By gathering the usages of advanced TDR (Time Domain Reflectometry) techniques, electronic pulse is generated and spreads in coaxial-cable. Its characteristic of resistance changes when the shape of coaxial-cable changes. So when the test pulse meets the characteristic resistance which has been changed, a reflecting wave is generated at that time. Then by measuring the time of spreading of reflecting wave, the position where the coaxial-cable characteristic resistance changes is known. Through analyzing the range of reflective wave, the state of the coaxial-cable can also be known and at last the goal of slope safety monitor is obtained.The system mainly consists of a TDR testing instrument, an embedded system terminal and a PC. The hardware core of the embedded terminal is the PXA255 processor of Intel company and the embedded operating system is Windows CE.net. The embedded system terminal and PC communicate by Ethernet or RS232. Using those tools, an administrator can query real-time data and monitor the embedded system terminal remotely.This paper introduces the whole design and implementation of the system, especially the embedded system terminal. There are 5 parts in this paper. In the first part the background of the project, where the basic concepts and characteristics of the embedded system are introduced. In the second part, electromagnetic wave is described under the various conditions of the characteristic and theories of computing model. In the third part, the hardware design of the embedded system including the design and implementation of the storage device, communication interface, man-machine interface is described. In the fourth part, the device-driver model of Windows CE.net operating system and the process of transplanting Windows CE.net are introduced. The main parts of this step are reduction of embedded operating system, bootloader development and driver development of LCD, USB, keyboard, UART etc. In the fifth part, application programming including function and flow chart of data sample module, data analysis module, data communication module and system management mpdule is elaborated. At last, the thesis has made a summary of the whole system, and put forward to future prospect and further use of the system.