Title :
Accurate digital time-of-flight measurement using self-interference
Author :
Cai, Canhui ; Regtien, Paul P.L.
Author_Institution :
Dept. of Comput. Sci., Hua Qiao Univ., Fujian, China
fDate :
12/1/1993 12:00:00 AM
Abstract :
Most ultrasonic distance measurements are based on the determination of the time of flight. This paper presents a novel way for the measurement of the time of flight, based on the detection of the envelope zero in an ultrasonic wave. A particular wave form is produced by supplying two pulse trains subsequently to an acoustic transducer. Distance information is retrieved from the zero, so a fully digital measurement is possible, reducing signal-processing time and resulting in a fast and accurate distance measurement
Keywords :
acoustic wave interference; digital instrumentation; distance measurement; ultrasonic measurement; ultrasonic transducers; US ranging; acoustic transducer; digital measurement; distance measurement; envelope zero; pulse echo technique; pulse trains; self-interference; signal-processing time; time-of-flight measurement; ultrasonic distance measurements; ultrasonic wave; Acoustic measurements; Acoustic signal detection; Distance measurement; Envelope detectors; Equations; Information retrieval; Piezoelectric transducers; Pulse measurements; Time measurement; Ultrasonic variables measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
