超声波测距系统设计.pdf
20101147
王红云,姚志敏,王竹林,史连艳
(军械工程学院导弹工程系,河北石家庄050003)
:设计一种对行中的汽车前方的障碍物行实时测距的超声波测距系统,包括超声波测距原理,硬件设计,使系统能及
时行障碍物距离的显示及声光报警处理;重点突出利用数字传感器DS18B20对温度行测量,利用声速与温度之间的校正公式
对声速行校正,提高了距离的测量准确度
:超声波;温度补偿;DS18B20传感器
:TP268:A:1006-2394(2010)11-0047-03
DesignofUltrasoundDistanceMeasurementSystem
WANGHongyun,AOZhimin,WANGZhulin,SHILianyan
(MissileEngineeringDepartment,OrdnanceEngineeringCollege,Shijiazhuang050003,China)
Abstract:Anultrasounddistancemeasurementsystemincludingitsprincipleandhardwaredesignisintroduced,
whichcanmeasurethedistancetotheforwardbarrierofautomobileinmarching.Itcanperformthebarrierdistancedis
playandwarningprocessingintmie.Itemphasizesonthetemperaturemeasurementcircuitwiththedigitalsensor
DS18B20.Anditusesthecorrectionformulatocorrecttheultrasoundspeed,soitmiprovesthemeasuringaccuracy.
Keywords:ultrasound;temperaturecompensation;digitalsensorDS18B20
PORTA4IO
1
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,,(1)图1超声波测距的基本原理图
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,图2超声波测距整体框图
:2010-06
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48201011
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