《基于超声波的语音测距仪的设计--可以》.pdf

基于超声波的语音测距仪的设计 肖炎根 (株洲职业技术学院湖南株洲412001) 播的速度随温度的变化而变化。为了准确计算出超声波的实时传播速度，系统采用DSl8820温度传感器测量环境温度．为 了提高远距离测量的精度，系统设计了AGC电路。为了减小偶然因素时测量结果的影响，系统每次测距都连续测量10次， 取平均值作为测量的结果。实践证明：该测距仪具有较高的测量精度和很高的推广价值． 关键词：单片机，测距仪f超声波，AGC；ISD2590 中图分类号：TN912．3 文献标识码：B 文章编号：1004—373X(2008)11—127—03 ofVoice FinderBasedonUltrasonic Design Range XIAO Yangen (ZhuzhouProfessional TechnologyCollege，Zhuzhou，412001，China) AT89S52iscontrolcoreinthe thevoicecircuitofthe iscom- Abstract=Singlechipmicrocomputer system，and system ofvoiceISD2590，whichrealizesthatthe resultsarecalculatedin isthe posed chip measuring real—time．There ve— propagation ofthe ultrasonicwiththeenvironmental orderto calculatethereal--time locity varying temperature．Inaccurately propagation oftheultrasonic，themeasurestheenvironmental DSl8820 velocity system the sensor．Toincrease temperatureby temperature the in fartherdistance，automaticcontrolcircuitshavebeen reducetheaccidentalfactors accuracymeasuring gain designed．To valueof ten is influencing／hemeasuringresults，theaverage measurementstakenastheaccurateresult．There- every practice suitshowsthatthe finderhas and value． range highmeasuringprecisionveryhighgeneralizing Keywords=singlechipmicrocomputerrangefinder；ultrasonic；AGC