DDS多频调制的相位激光测距发射系统设计
摘要随着激光技术的不断发展，不论是在军用还是民用领域，激光测距都因为其高度的精确性和良好的抗干扰能力，从众多的测距方法中脱颖而出，成为了新时代的主要测距技术。而在激光测距的各种方法中，相位激光测距又具有比脉冲法和三角法更高的精度，对接收设备要求一般，以及成本较低等优势。本课题主要是用于相位法激光测距的发射系统的研究与设计，采用目前比较先进的直接数字频率合成技术（DDS）产生高稳定的调制正弦信号和本振信号。本文以介绍相位激光测距的原理为基础，通过了解相位激光测距仪研究的意义和发展，设计了相位激光测距发射系统。通过使用DDS芯片产生具有相近频率的调制信号和本振信号，为后续的距离测量做准备。本文给出了芯片的选择，调制信号产生的电路和激光驱动电路的电路。60088
关键词 相位激光测距 DDS 频率调制
毕业设计说明书（毕业论文）外文摘要
Title Design of multi-frequency modulated phase method laser rangefinder launch system
Abstract With laser technology continues to evolve，both in the military or civilian areas, laser stand out from many ways of distance measurement because of its high accuracy and good anti-jamming capability. Become a new main technology of distance measurement .In various Laser Ranging ways, phase laser ranging has advantage of high precision, low requirements for acceptance equipment in general, and low cost.This topic is mainly used for the researching and designing of the Emission system of phase laser range finder.Using a more advance technology,direct digital frequency synthesis (DDS),to produce high and stable modulating sinusoidal signal and local oscillator signals. This paper based on introducing the principle of a phase laser rangefinder,proposed the designing of emission system of laser range finder by understanding the significance of researching laser range finder and its development. By using the DDS chip,we can produce the same Frequency modulation signal and local oscillator signal,bedding for the subsequent acceptance.In this paper,we introduce the selection of chip,the circuit of generating Modulation signal and the laser drive circuit.
Keyword phase laser ranging DDS Frequency Modulation
目 录
1 引言 1
1.1 激光测距的优点 1
1.2 激光测距仪的国内外发展 1
1.3 本课题研究的目的和意义 4
2 激光测距的分类和原理 5
2.1 激光测距的分类 5
2.1.1 脉冲激光测距 5
2.1.2干涉法激光测距 6
2.1.3 相位法激光测距 7
2.2 相位法激光测距的原理分析 9
2.3 相位激光测距中的测尺频率 10
2.4 本章小结 11
3 相位激光测距发射系统的各模块设计 12
3.1 相位激光测距系统的组成 12
3.2 相位激光测距的发射系统 12
3.3 调制信号和本振信号产生模块 13
3.3.1 STM32模块设计 14
3.3.2 DDS模块