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70|TechniquesofAutomation&ApplicationsTheDesignofWindSpeedandDirectionDetectionSystemBasedonMicrocontrollerCHENGWei(SchoolofAutomation,WuhanUniversityofTechnology,Wuhan430070China)Abstract:Thispaperintroducesaprincipleofwindspeedanddirectionsensor,chooseLPC921microcontrollertodesignadetectionsystemofdataacquisitionanddatatransmission.Itshowsthehardwarecircuitdiagramandsoftwareflowchart,andanalysesthehardwaredesignandsoftwareprogrammingproblems.Keywords:windspeed;winddirection;microcontroller;detectionCommunicationandInformationProcessingTechniquesofAutomation&Applications|71CommunicationandInformationProcessing72|TechniquesofAutomation&ApplicationsCommunicationandInformationProcessingTechniquesofAutomation&Applications|73CommunicationandInformationProcessing