Engine parameter acquisition display system is an important member of helicopter seat room display system , and is made of engine parameter acquisition unit ( epu ) and engine parameter display ( epd ) . epu is joined with engine electronic controller , fuel manage system , engine and accumulator by the wire . it acquire the parameter of engine , for example , analog signals , frequency signals and discrete signals , etc . then data processing , compare data and operation is executed 發(fā)動機參數(shù)采集器通過硬連線與發(fā)動機電子控制器、燃油管理系統(tǒng)、發(fā)動機及蓄電池相連,采集模擬量、頻率量及離散量信號等參數(shù),并對采集的數(shù)據(jù)進行運算、比較與處理,最后通過標準rs ? 422a串口和發(fā)動機參數(shù)顯示器及其它設備進行通訊。