The measuring instrument for blade resonant frequency mainly consists of a front end circuit , a signal collecting circuit , and a coiilputing and displaying circuit . this paper provides a detailed hardware diagran , software flow chart and design process , expounds the operation and calibration of the instrument , and analyses the measuring data in detail according to different conditions 葉片共振頻率測試儀主要由前置電路,信號采集電路及運算和顯示電路組成,文中給出了詳細的硬件電路圖、軟件流程圖及設(shè)計過程,闡述了該儀器的使用和校驗方法,并針對不同的狀況對測量數(shù)據(jù)進行詳細的分析。