Ultrasonic Distance Measurement Method With Crosstalk Rejection at High Measurement Rate

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This paper introduces a computationally intensive method for measuring distance at high measurement rates using chaotic pulse-position (CPPM) signals and single-bit signal processing in a single ultrasound sensor system. To prevent crosstalk from other ultrasonic sensor systems, a chaotic system is used, and the ultrasonic pulses are transmitted as a pulse sequence generated by CPPM. After receiving the ultrasound signal, the single-bit signal was generated by a fast Fourier transform threshold, which also functions as an environmental noise filter. Single-bit signal processing has been adopted to reduce the computational load when cross correlating the transmitted and received signals for time-of-flight calculations. Single-bit signal processing has more than 100 times memory saving effect in this paper. Additionally, as the signal-to-noise ratio increases, extension of the maximum measurable distance in the ultrasonic distance sensor system is expected. The simulation shows the crosstalk rejection performance of the proposed method, and the experimental results confirm the improvement of the measurement speed by the proposed method.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2019-04
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, v.68, no.4, pp.972 - 979

ISSN
0018-9456
DOI
10.1109/TIM.2018.2863999
URI
http://hdl.handle.net/10203/253947
Appears in Collection
ME-Journal Papers(저널논문)
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