【摘要】 本文分析了分辨力与随机误差的定量关系，并以此为指导选择和设计了超声发射、接收、测时等电路以及数字滤波方法，提高了超声测距的精度和分辨力．更多还原

【Abstract】 The paper analyses the quantitative relation between the resolution and random error, As a guide to design the circuits for ultrasound transmitting and receiving,time- measurement, and digital wave-filter, as a result, the accuracy and resolution ofthe ultrasonic distance-measurement is increased.更多还原