基于TDC-GP21的激光测距设计.docx

I 基于 TDC-PG21 的激光测距【摘要】激光测距仪正朝着小型、低功耗和高精度方向发展,尝试研制一种高精度的便携式脉冲激光测距仪。针对脉冲式激光测距技术展开,重点研究短时间间隔的高精度测量这一关键技术。在对普通脉冲激光测距机的时间间隔测量方法分析后,提出了基于高精度时间间隔测量芯片 TDC-GP21 的便携式脉冲半导体激光测距仪系统方案。分析了 TDC-GP21 时间测量原理,设计了基于 TDC-GP21 的时间间隔测量单元,脉冲半导体激光器的驱动电源、光电探测器的驱动电路。针对有限距离的计数分辨率引起的误差,结合传统提高时间分辨率的方法, 并对这一技术进行研究、发展和创新,使得测距系统的时间测量精度得到了很好的保证及提高,降低了硬件成本,简化了控制电路。【关键词】激光测距,时间间隔测量, TDC —GP21 ,测距精度 II Laser Ranging Based on TDC-GP21 [Abstract] The laser range finder is developing in small,low-power and high-precision portable laser range finder with high precision was researcher in this paper. We have studied the pulsed laser ranging technology, and the priority is the critical technology of the high-precision measurement in short intervals. In this paper,we have proposed the solutions of the portable diode laser rangefinder system based on the high-precision time interval measurement chip TDC-GP21, through a deep research of the principle of the pulsed laser rangefinder. studied the time measuring principle of the TDC-GP21, designed the time interval measurement unit that based on the TDC-GP21, designed the driven power of the pulse- semiconductor lasers and the driven circuit of the photoelectric detector. To solve the error caused by the count resolution ina limited distance, we bined traditional methods to improve the time resolution, and with the research, development and innovation of the technology, we have ensured and developed the time measurement accuracy of the ranging system, reduced the cost of the hardware and simplified the control circuit. [Key Words] Laser ranging , Time intervals , TDC-GP21 , Ranging precision measurement III 目录第一章引言................................................................................................................................ 1 激光测距技术.............................................................................................................. 1 激光测距的发展状况............................................................................