基于FPGA的激光测云仪设计

A Design of Laser Ceilometer based on FPGA

根据脉冲法测距原理,采用功率激光器和PIN探测器设计了一种高速信号采集处理系统,构建便携式激光测云仪系统。基于Cyclone iv FPGA定制了ADC控制接口配合复杂的系统时序完成高速数据采集存储与处理。将采集到的数据依据曲率分段,利用快速小波除噪算法处理后,与参考云层数据进行灰色关联分析。实验表明,该设计系统集成度高,测量结果一致性较好。

According to the theory of pulse ranging method, a high speed signal collecting and processing system by used the power laser emission and the PIN detector was designed to construct a system of portable laser ceilometer. The digital process- ing system used for data collecting, storing and processing is based on Cyclone iv FPGA which customized the ADC control in- terface and applied complicate system timing. This thesis divided collected data based on curvature, then applied the fast wave- let to get rid of the noise and calculated grey correlation with the actual reference data. Experiments show that the integration degree of the system is high and the results of the measurement are in good consistency.