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http://dx.doi.org/10.7471/ikeee.2021.25.4.584

Removal Method of Signal Interference between Ultrasound Sensors  

Im, Hyungchul (Soongsil University)
Lee, Seongsoo (Soongsil University)
Publication Information
Journal of IKEEE / v.25, no.4, 2021 , pp. 584-590 More about this Journal
Abstract
This paper proposes a removal method of signal interference between ultrasound sensors where ghost signals due to interference are excluded and correct signal is recognized in distance mensurement using ultrasound sensors. The proposed method detects and excludes ghost signals when previous measured distance is compared to current measured distance and the distance difference exceeds a threshold. The threshold is fixed in conventional methods, so ghost signals cannot be correctly excluded when ultrasound sensor or target object move rapidly. On the contrary, to improve accuracy, the threshold is not fixed in the proposed method, and the threshold is adpatively determined based on the relative velocity when ultrasound sensor or target object move. Experiments of distance measurement with ultrasound signal interference are carried out where multiple ultrasound sensors of same type are exploited with maximum interference, and the results show that the proposed method efficiently exclude ghost signals.
Keywords
Ultrasonic Sensor; Interference; Autonomous Driving; Obstacle Avoidance;
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Times Cited By KSCI : 1  (Citation Analysis)
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