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

Volume

42

Issue

6

fYear

1993

fDate

12/1/1993 12:00:00 AM

Firstpage

990

Lastpage

994

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;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.245651

Filename

245651