【作者】 龙卓群；

【导师】 王昌明；

【作者基本信息】 西安电子科技大学 ， 系统工程， 2007， 硕士

【摘要】 本文在非接触测量领域中常用的激光测距技术着手,分析激光测距技术中常用的几种测距方法,重点介绍了已获得广泛应用的脉冲激光测距技术,详细论述了近年来提出的自触发脉冲飞行时间激光测距技术,特别是其中的双自触发脉冲激光测距技术。依据其原理,采用现代电子设计方法,对电路基本的硬件和软件算法进行设计。首先,在激光发射方面,使用先进的激光二极管和高性能驱动芯片产生高质量的光脉冲作为测距信号;其次,在光信号接收方面,使用对特殊波长响应度极高的低噪声的雪崩二极管作为接收器件,利用高带宽信号放大芯片对信号进行放大,并结合高速比较器来提取有用信号;再次,采用大规模可编程逻辑器件(FPGA)来进行计数,实现高精度的脉冲飞行时间的测量;最后,选用高性能的单片机完成数据的处理及相关的试验装置设计。更多还原

【Abstract】 This thesis begins with a general survey of laser range-finding technology in the non-contact measurement, followed by the recent development of self-triggering pulsed time-of-flight laser range-finding technology, with the emphasis on binary self-triggering pulsed laser range-finding technology. Based on binary self-triggering pulsed laser range-finding principle and the modern electronic design method, this thesis is to re-design hardware algorithm and software algorithm in circuit.Firstly, in laser emission unit, high quality optical pulses, generated by advanced laser diode and high performance driving chips, serve as range-finding signals; secondly, in light signal reception unit, low noise avalanche diode, due to its high responsivity to special wavelength, acts as optical receiver, extracting useful signal with the combination of high bandwidth amplifier and high speed comparator; thirdly, with the adoption of FPGA for counting, high accuracy pulse time-of-flight measurement is achieved; lastly, high performance microcontroller is used for data-processing and relevant experiment device design.更多还原