The signal testing unit examines directly the production parameter - the belt " s velocity and sends out electrical signal similar to sine wave . the signal handling and analyzing unit disposes of the sensor " s output signal by amplifying , plasticisering a / d transforming and measuring and displays it digitally . after the alarming and controlling unit compares the testing signal with the standard one and analyses , it will show the normal production situation or alarm at the abnormal state and control the related equipments if it is necessary 信號檢測單元直接檢測皮帶速度,并輸出近似正弦波的電信號:信號處理與分析單元對傳感器輸出信號進(jìn)行放大、整形、 a d轉(zhuǎn)換和計算等處理,并進(jìn)行數(shù)字顯示;預(yù)警、報警、控制單元將信號與標(biāo)準(zhǔn)信號進(jìn)行比較,經(jīng)分析后顯示正常狀態(tài)或?qū)Ξ惓顟B(tài)進(jìn)行聲、光預(yù)警、報警。