有关 thebackdraftradarwasdesignedbyultrasonicprinciple.the32binaryelementsarmlpc2103ofthedemoboardeasyarm2103isutilizedasdigitalcircuitprocessor.ultrasonicrangingmodulev2.0producedbylingyangcorporationisutilizedasrangingsystem.ocmj28643isutilizedaslcdandthedevelopingsoftwareisads1.2.theideaofmodularizationhasbeenusedtodividethesystemintoultrasonicmeasuringpartandlcdpart.inthisway 的文章