论文部分内容阅读
为了扩展激光雷达的测量动态范围,设计了一种基于模拟与光子计数融合方法的信号采集系统。采用多级放大技术设计了用于模拟与光子计数融合方法的双通道前置放大器,并与通用数据采集卡和光子计数卡组成信号采集系统。利用激光雷达信号模拟源搭建了测试系统;通过测量坪特性和脉冲高度分布确定光电倍增管(PMT)的工作高压和鉴别电平;测试了模拟通道和光子计数通道的性能以及两个通道的可拼接性。实验结果表明,设计的信号采集系统性能优于LICEL公司的瞬态记录仪TR20-160;两个通道的信号具有较好的拼接性,通过两个信号的拼接提高了激光雷达信号采集系统的动态范围。
In order to extend the measurement dynamic range of Lidar, a signal acquisition system based on the fusion method of analog and photon counting is designed. The multi-stage amplification technology is used to design a dual-channel preamplifier for analog and photon counting fusion method. The signal acquisition system is composed of general data acquisition card and photon counting card. The test system was built by using the laser radar signal simulation source. The working voltage and discrimination level of the PMT were determined by measuring the characteristics of the pings and the distribution of the pulse height. The performances of the analog channels and the photon counting channels as well as the performance of the two channels Splicing. The experimental results show that the performance of the designed signal acquisition system is better than that of the transient recorder TR20-160 of LICEL Company. The signals of the two channels have better splicing performance, and the dynamic of the laser radar signal acquisition system is improved by the splicing of the two signals range.