毕业设计（论文）基于单片机的超声波液位测量系统

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1、毕业设计（论文）基于单片机的超声波液位测量系统摘要超声波液位测量是一种非接触式的测量方式它是利用超声波在同种介质中传播速度相对恒定以及碰到障碍物能反射的原理研制而成的与其它方法相比如电磁的或光学的方法它不受光线被测对象颜色的影响对于被测物处于黑暗有灰尘烟雾电磁干扰有毒等恶劣的环境下有一定的适应能力毕业设计（论文）基于单片机的超声波液位测量系统摘要超声波液位测量是一种非接触式的测量方式它是利用超声波在同种介质中传播速度相对恒定以及碰到障碍物能反射的原理研制而成的与其它方法相比如电磁的或光学的方法它不受光线被测对象颜色的影响对于被测物处

2、于黑暗有灰尘烟雾电磁干扰有毒等恶劣的环境下有一定的适应能力毕业设计（论文）基于单片机的超声波液位测量系统摘要超声波液位测量是一种非接触式的测量方式它是利用超声波在同种介质中传播速度相对恒定以及碰到障碍物能反射的原理研制而成的与其它方法相比如电磁的或光学的方法它不受光线被测对象颜色的影响对于被测物处于黑暗有灰尘烟雾电磁干扰有毒等恶劣的环境下有一定的适应能力AbstractTheultrasonicliquidlevelmeasurementisanon-contactmeasurementmethodrealizedbytheprin

3、cipleofultrasonicwaveinthesamemediumwithrelativelyconstantpropagationvelocityandbeingreflectedwhenitapproachesanobstacleComparedwithothermethodssuchaselectromagneticoropticalmethodithasacertainofadaptabilitywhenobjectstobemeasuredareundersuchharshenvironmentasdarknessd

4、ustsmokeelectromagneticinterferencetoxicityunaffectedbythelightorthecoloroftheobjecttobemeasuredThereforeitbearsimportantpracticalsignificancetoconductresearchontheapplicationofultrasonicwaveinhighprecisionrangingsystemInthisprojectSCM-basedultrasonicliquidlevelmeasuri

5、ngsystemismainlycomposedoftwocomponentsnamelythehardwareandthesoftwareThehardwareisultrasonicliquidlevelmeasurementbasedonAT89C51chipasthecoreitadoptsAT89C51singlechipmicrocomputerforcontrolanddataprocessingprovidestheultrasonictransmittingandreceivingcircuitandimprove

6、srangingaccuracythrougheliminationofblindspotandsamplingofambienttemperatureBytakingadvantageoftherelationshipbetweendistanceandtimeinultrasonictransmissionanultrasonicliquidleveldetectingsystemwhichcanaccuratelymeasurethedistancebetweentwopointsisdesignedThissystemhas

7、theseadvantageslikeeasycontrolreliableoperationhighmeasurementprecisionandreal-timedetectionofliquidlevelAndithasultrasonictransmittingandreceivingcircuitresetcircuitsofSCMLEDdisplaycircuitalarmcircuitcomposedofultrasonicprocessingmoduleCX20106AandCD4069Thesoftwarepart

8、consistsofmainprogrampresetsubroutinetransmittingandreceivingsubroutineanddisplaysubroutineTheprobesignalisprocessedb