Title :
A low-cost dynamic range-finding device based on amplitude-modulated continuous ultrasonic wave
Author :
Hua, Hong ; Wang, Yongtian ; Yan, Dayuan
Author_Institution :
Dept. of Opt. Eng., Beijing Inst. of Technol., China
fDate :
4/1/2002 12:00:00 AM
Abstract :
A practical low-cost acoustic range-finding method is presented, which provides a high-speed and high-accuracy solution for distance measurement. It is based on the linear phase delay of the received signal, with respect to the transmitted signal caused by the distance between the transmitter and the receiver. A continuous ultrasonic signal amplitude modulated by a low-frequency acoustic signal is used. The accuracy can be up to 2 mm within 1.5 m and the dynamic data update rate can be up to 150 Hz. The design principles, hardware implementation, experimental results, and performance analysis are included
Keywords :
amplitude modulation; delays; distance measurement; ultrasonic applications; 1.5 m; 150 Hz; 2 mm; AM; acoustic range-finding device; amplitude modulated signal; continuous US signal; distance measurement; dynamic range-finding device; hardware implementation; linear phase delay; low-cost range-finding method; low-frequency acoustic signal; phase detection; ultrasonic signal; Acoustic devices; Distance measurement; Dynamic range; Hardware; Optical transmitters; Phase detection; Phase measurement; Ultrasonic variables measurement; Velocity measurement; Wavelength measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
