煤矿提升容器激光定位系统.doc
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煤矿提升容器激光定位系统,摘要课题的目的是设计一个基于激光相位法测距原理的煤矿提升容器定位系统，本文重点设计了其中的测距激光回波信号接收调理模块。设计的激光回波信号接收调理模块包括激光回波接收、放大、混频和ad转换。论文设计了雪崩二极管apd的激光接收电路，接收激光回波信号并进行初步放大；设计了以运放ad603为核心的可变增益放大电路，对回波信...
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摘要
课题的目的是设计一个基于激光相位法测距原理的煤矿提升容器定位系统，本文重点设计了其中的测距激光回波信号接收调理模块。
设计的激光回波信号接收调理模块包括激光回波接收、放大、混频和AD转换。论文设计了雪崩二极管APD的激光接收电路，接收激光回波信号并进行初步放大；设计了以运放AD603为核心的可变增益放大电路，对回波信号进行约400倍的放大；设计了基于MC1496的混频电路和基于AD9238的AD转换电路，由本振信号、主振信号等混频产生两个15kHz的差频信号，并由AD转换器转换成数字信号，送给DSP进行FFT变换和相位分析。
模块中，APD激光接收电路转换速度快、线性度好；可变增益放大电路通带波动小，阻带衰减大，具有很好的频率特性；混频器中还具有放大作用，进一步提高了回波信噪比；所采用的AD转换器转换速度快、精度比较高。整个模块设计合理，较好地实现了测距激光的接收、转换等功能。
关键词：激光测距，雪崩二极管，增益放大，混频，AD转换
ABSTRACT
The objective is to design a subject is based on the principle of laser rangefinder phase method coal mine hoist vessel positioning system, this paper designs the location of the laser echo signal receiving recuperation module.
Design of the laser echo signal receiving recuperation modules including laser echo receiving, amplification, mixing and AD transform. The paper designs laser receiving circuit of APD avalanche diode, receiving and preliminarily laser echo signal amplifier; Designs variable gain amplifier circuit
in AD603 op-amp design as the core of the variable gain for echo signal amplifier circuit, about 400 times the amplifier; Designs the frequency mixing circuit which based on the chip of MC1496 and designs AD transform circuit
based on the chip of AD9238, by the vibration signal and the main vibration signal mix frequency to produces the two 15kHz produces difference frequency signal, and by AD converter converted into digital signals, transported to DSP system for FFT transformation and phase analysis.
Module, APD laser receiving circuit has switching speed, good linearity; Variable gain amplifier circuit bandpass fluctuation little, stop-band attenuation, has the very good frequency characteristics; The mixer is also enlarge the echo, further improve the signal-to-noise ratio; The converting speed, precision of AD converter is high. The module design is reasonable, better realize the transformation of the laser rangefinder receiving, etc. Function.
Keywords：laser rangefinder, Amplitude Probability Distribution (APD), gain amplification, frequency mixing, AD transform
目录
1 绪论 1
1.1 课题的目的和意义 1
1.2 本课题的发展现状 2
1.3 本设计所做的主要工作 5
2 课题的总体设计方案 6
2.1 系统的总体原理与框图 6
2.2 激光接收的原理与框图 9
3 激光信号接收放大电路 10
3.1 光电转换电路方案比较 10
3.2 APD器件特性及选型 13
3.3 激光接收放大电路设计 16
4 自动增益控制电路 25
4.1 自动增益电路方案比较 25
4.2 AD603的结构与特性 27
4.3 自动增益控制电路设计 31
4.4 自动增益控制电路的仿真与调试 32
5 混频放大电路 35
5.1混频电路方案比较 35
5.2 MC1496芯片特性 38
5.3 混频放大电路设计 40
6 多路AD转换电路设计 43
6.1 AD转换器的选型 43
6.2 AD9238和AD8138特性 45
6.3 AD转换电路设计 47
7 总结 50
致谢 52
参考文献 53
附录A 各模块电路图 55
附录B 外文文献及其翻译 59
课题的目的是设计一个基于激光相位法测距原理的煤矿提升容器定位系统，本文重点设计了其中的测距激光回波信号接收调理模块。
设计的激光回波信号接收调理模块包括激光回波接收、放大、混频和AD转换。论文设计了雪崩二极管APD的激光接收电路，接收激光回波信号并进行初步放大；设计了以运放AD603为核心的可变增益放大电路，对回波信号进行约400倍的放大；设计了基于MC1496的混频电路和基于AD9238的AD转换电路，由本振信号、主振信号等混频产生两个15kHz的差频信号，并由AD转换器转换成数字信号，送给DSP进行FFT变换和相位分析。
模块中，APD激光接收电路转换速度快、线性度好；可变增益放大电路通带波动小，阻带衰减大，具有很好的频率特性；混频器中还具有放大作用，进一步提高了回波信噪比；所采用的AD转换器转换速度快、精度比较高。整个模块设计合理，较好地实现了测距激光的接收、转换等功能。
关键词：激光测距，雪崩二极管，增益放大，混频，AD转换
ABSTRACT
The objective is to design a subject is based on the principle of laser rangefinder phase method coal mine hoist vessel positioning system, this paper designs the location of the laser echo signal receiving recuperation module.
Design of the laser echo signal receiving recuperation modules including laser echo receiving, amplification, mixing and AD transform. The paper designs laser receiving circuit of APD avalanche diode, receiving and preliminarily laser echo signal amplifier; Designs variable gain amplifier circuit
in AD603 op-amp design as the core of the variable gain for echo signal amplifier circuit, about 400 times the amplifier; Designs the frequency mixing circuit which based on the chip of MC1496 and designs AD transform circuit
based on the chip of AD9238, by the vibration signal and the main vibration signal mix frequency to produces the two 15kHz produces difference frequency signal, and by AD converter converted into digital signals, transported to DSP system for FFT transformation and phase analysis.
Module, APD laser receiving circuit has switching speed, good linearity; Variable gain amplifier circuit bandpass fluctuation little, stop-band attenuation, has the very good frequency characteristics; The mixer is also enlarge the echo, further improve the signal-to-noise ratio; The converting speed, precision of AD converter is high. The module design is reasonable, better realize the transformation of the laser rangefinder receiving, etc. Function.
Keywords：laser rangefinder, Amplitude Probability Distribution (APD), gain amplification, frequency mixing, AD transform
目录
1 绪论 1
1.1 课题的目的和意义 1
1.2 本课题的发展现状 2
1.3 本设计所做的主要工作 5
2 课题的总体设计方案 6
2.1 系统的总体原理与框图 6
2.2 激光接收的原理与框图 9
3 激光信号接收放大电路 10
3.1 光电转换电路方案比较 10
3.2 APD器件特性及选型 13
3.3 激光接收放大电路设计 16
4 自动增益控制电路 25
4.1 自动增益电路方案比较 25
4.2 AD603的结构与特性 27
4.3 自动增益控制电路设计 31
4.4 自动增益控制电路的仿真与调试 32
5 混频放大电路 35
5.1混频电路方案比较 35
5.2 MC1496芯片特性 38
5.3 混频放大电路设计 40
6 多路AD转换电路设计 43
6.1 AD转换器的选型 43
6.2 AD9238和AD8138特性 45
6.3 AD转换电路设计 47
7 总结 50
致谢 52
参考文献 53
附录A 各模块电路图 55
附录B 外文文献及其翻译 59
