dispersedness การใช้

• According to the high dispersedness and low precision of measurements when using the traditional time difference method in small diameter and low flow rates conditon , this paper brings forward a new method based on high - speed data acquisition technique . the time difference comes out accurately with high resolving ability of time by using the method and the signal processing algorithms . the developed ultrasonic detection system is composed of two ultrasonic detectors , a transmitting and receiving ultrasonic unit , a high - speed data acquisition unit and a computer