a wide dynamic range laser rangefinder with cm-level resolution based on agc amplifier structure

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1、Awidedynamicrangelaserrangefinderwithcm-levelresolutionbasedonAGCamplifierstructure以AGC放大器为架构的厘米级分辨率宽动态范围激光测距仪罗延美外国语114班学号：1118100117Abstract摘要Apulsedtime-of-flight(TOF)laserrangefinderwithapulsedlaserdiodeandanavalanchephotodiode(APD)receiverisconstructedandtested.Triggedbyanavala

2、nchetransistor,thelaserdiodecanemitaperiodicpulsewithrisetimeof~2ns.Anewstructurewithautogaincontrol(AGC)circuitsbothinthepre-amplifierandthepost-amplifierispresented.Throughthistechnology,notonlythedynamicrangeofthereceiverisextended,butalsothewalkerroroftimingdiscriminatorsisredu

3、ced.Largemeasurementrangefrom5mto500misachievedwithoutanycooperativetarget.Thesingle-shotprecisionis3cmfortheweakestsignal.Comparedwithpreviouslaserrangefinders,thecomplexityofthissystemisgreatlysimplified.我们将要操作和测试有着脉冲激光二极管和雪崩光电二极管接收器的脉冲飞行时间激光测距仪。雪崩晶体管的支持下，激光二极管可以发射上升时间为2ns周期性的脉冲。

4、有着自动增益控制电路的新架构会在前置和后置放大器中呈现。应用这种技术之后，不仅接收器的动态范围延展了，定时鉴定器的运行误差也减少了。我们还成功地取得了巨大的测量范围，而测量时没有使用相同的目标。对于最弱的信号，单发精确度为3厘米。与之前的激光测距仪对比，这个系统大大地简化了许多复杂的部分。Keywords关键词LaserrangefindingAutogaincontrol(AGC)Time-of-flight(TOF)Trans-impedanceamplifier(TIA)激光测距自动增益控制（AGC）飞行时间（TOF）跨阻抗放大器（TIA）1.Intr

5、oduction1.简介Pulsedtime-of-flight(TOF)laserrangefinderhasattractedgreatinterestinspeedmeasurementandtrafficcontrol,threedimensionalprofilingandscanning,etc.[1–4].PulsedTOFlaserrangefinderisbasedonmeasuringtheround-triptimeintervalbetweenemittedpulseandreflectedpulse.Commonstructureo

6、fanTOFlaserrangefinderconsistsoffivemajorcomponents:alaserdiodetransmitter,areceiverchannel(PINandAPDphotodiodes,pre-amplifierandpost-amplifier),atimingpart(twotimediscriminatorsandatime-to-digitalconverter),transmittingandreceivingopticalsystems,andamicrocontrolunit(MCU),asillustr

7、atedinFig.1.脉冲飞行时间激光测距仪让人们对速度检测、流量控制、三维分析和扫描等等产生了极大的兴趣[1–4]。脉冲飞行时间激光测距仪是基于测量发射脉冲和反射脉冲之间的往返时间间隔来运作的。常见的飞行时间激光测距仪由几个主要的元件构成：激光二极管发射器，接收器通道（PIN和APD光电二极管，前置放大器和后置放大器），定时组件（两个时间甄别器和一个时数转换器），用于传输和接收的光学系统和微型控制装置（MCU），如图1所示。Inordertoachieveasingle-shotprecisionofcm-level,therisetimeofthela

8、serdiodetransmittermustbea