The Update And Experiment For FMT System Based On USB Interface

In the thesis, some research work, which is aimed to update the FMT system, is introduced on based of analyzing the developing history, the current status and developing trend for instrument home and abroad, especially the theory of the FMT system.The Full Micro-Computerized Test and Analyzing System for Transmission Error and Motion Property (FMT),)FMT system is one new type transmission error analyzing system in which the theory of pulse signal division and the usage of microcomputer are successfully combined. The project"The update and experiment for FMT system based on the USB interface"is to update the FMT system. The peripheral is a embedded micro-control unit (MCU) system. The application program that runs in personal computer (PC) completes real-time data acquisition, real-time data processing and real-time data displaying communicating with the MCU system by the USB interface.The main research contents of this dissertation are shown in the following:(1) Introduce one method of use the counting pulse to develop IE measuring system and new method of using the high frequency clock signal to divide the space pulse.(2) Analyze the theory of USB interface and design the USB module . Complete the bi-directional data communication between the hardware and the microcomputer.(3) Design the CPLD(Complex Programable Logic Device) processing circuit to preprocess the initial signal in the data acquisition module.(4) Use Visual C++ to develop one IE measuring system mainly including the data acquisition recorder, real time analyzer and frequency domain analyzer.(5) Complete three experiments: the simulating experiment, the transmission link experiment with the single-transmission rate and the transmission link experiment with multi-transmission rate. The experiment data and error curve shows the validation of the FMT system.