Fpga-based Speed Radar Technology Research

As an important parameter of ballistics research, it is crucial to measure the bullet velocity accurately. The design for the system of muzzle velocity measurement requires some characteristics, which are high accuracy, and small size and so on. The emergence of FPGA provides some new methods for the design of the muzzle velocity measurement system. With the characteristics of high speed of operation, powerful ability to control, flexible design, FPGA has been widely applied in the field of modern digital signal processing. The research about the muzzle velocity measurement system based on FPGA promotes the development of bullet velocity measurement techniques.The dissertation introduced the development of the muzzle velocity measurement system in our country firstly, then it determined the overall system design according to the system specifications and Doppler principle. The system design is composed of hardware and software designs. It included the design of transceiver components, the trigger circuit, front-end circuit and signal processing circuit in the hardware design. Two plans of the filter circuit had been considered, then the best plan was chosen and the circuit diagram was accomplished. In the design of software, four modules were realized and simulated, which were computing module, control module, storage module and clock management module. Finally, the PCB diagram of the pre-processing circuit was shown first, then the FPGA downloading and.data transmission by USB were debugged using the board of signal processing.In the end of the dissertation, two types error in the system were analyzed, which were systematic error and random error. And the corresponding solutions were put forward at the same time.