S&M Young Researcher Paper Award 2020
Recipients: Ding Jiao, Zao Ni, Jiachou Wang, and Xinxin Li [Winner's comments]
Paper: High Fill Factor Array of Piezoelectric Micromachined
Ultrasonic Transducers with Large Quality Factor

S&M Young Researcher Paper Award 2021
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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Omnidirectional Ultrasonic Localization for Mobile Robots [PDF]

Chen-Chien Hsu, Hsin-Chuan Chen, Ching-Chang Wong, and Chien-Yu Lai

(Received April 28, 2021; Accepted September 6, 2021)

Keywords: ultrasonic, omnidirectional sensing, localization, mobile robot, dual-circle localization

To solve the detection angle limitation of conventional ultrasonic sensors, we propose a localization system based on omnidirectional ultrasonic sensing by using a reflection cone to generate ultrasonic beams with 360° propagation. The architecture of the proposed localization system includes four ultrasonic receivers deployed around a square measuring environment and a mobile robot carrying an integrated omnidirectional ultrasonic module as a transmitter. When the ultrasonic receivers receive ultrasonic signals from the integrated omnidirectional ultrasonic module, distance measurements between the transmitter and the receiver can be obtained by time-of-flight calculation, which are sequentially transferred to a remote PC via a Zigbee wireless network. Using the distance measurements collected from the receivers, the coordinates of the mobile robot can be determined by using the established dual-circle localization method. Experimental results have shown satisfactory accuracy in determining the coordinates of the mobile robot via the proposed localization system.

Corresponding author: Hsin-Chuan Chen

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