The Measuring System For The Bridge Dynamic Deflection Based On ARM9

The deflection is the very important character of bridge performance, which can show us the capability of bridge to stand the earthquake and some other shock force. So the research of the bridge deflection testing method and the precision of bridge deflection testing equipment become the critical issue. This design gives a new study way to measure the dynamic deflection of bridge by using the optical fiber gyro.The thesis begins with the analysis of dynamic deflection characters and working principle of optical fiber gyro. After this detail analysis, the useful arithmetic of bridge deflection testing which is easy and practical is given. Also the simulated flat is built up in later statement. The validation experiment compare between the traditional method which use the displacement sensor and the optical fiber gyro way. The following paragraphs give out the test error and the way to amend.After ascertain the system configuration, the thesis presents the whole single analytic block by using the ARM9 processor S3C2410X as the CPU. The chip has the powerful extension ability. And LCD man-machine interface part and SD storage card interface can be extended from the chip port simply. For meeting the test precision, the 16bit ADC and FIFO subsystems are designed before the single arriving the main processor. In the thesis, the detail hardware design and the EMI are presented. At the last chapter, the embedded OS Linux is selected to be the very important part of intelligent measuring device.