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Sensors 2017, 17(5), 1089; doi:10.3390/s17051089

Vehicle Counting and Moving Direction Identification Based on Small-Aperture Microphone Array

1
Science and Technology on Microsystem Laboratory, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 201800, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
School of Mechanical Engineering and Electronic Information, China University of Geosciences, Wuhan 430074, China
4
IBM-Research China Labotatory, Beijing 100094, China
*
Author to whom correspondence should be addressed.
Academic Editors: Xiaoning Jiang and Chao Zhang
Received: 9 March 2017 / Revised: 14 April 2017 / Accepted: 9 May 2017 / Published: 10 May 2017
(This article belongs to the Special Issue Acoustic Sensing and Ultrasonic Drug Delivery)
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Abstract

The varying trend of a moving vehicle’s angles provides much important intelligence for an unattended ground sensor (UGS) monitoring system. The present study investigates the capabilities of a small-aperture microphone array (SAMA) based system to identify the number and moving direction of vehicles travelling on a previously established route. In this paper, a SAMA-based acoustic monitoring system, including the system hardware architecture and algorithm mechanism, is designed as a single node sensor for the application of UGS. The algorithm is built on the varying trend of a vehicle’s bearing angles around the closest point of approach (CPA). We demonstrate the effectiveness of our proposed method with our designed SAMA-based monitoring system in various experimental sites. The experimental results in harsh conditions validate the usefulness of our proposed UGS monitoring system. View Full-Text
Keywords: vehicle counting; moving direction; small-aperture microphone array; UGS vehicle counting; moving direction; small-aperture microphone array; UGS
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Zu, X.; Zhang, S.; Guo, F.; Zhao, Q.; Zhang, X.; You, X.; Liu, H.; Li, B.; Yuan, X. Vehicle Counting and Moving Direction Identification Based on Small-Aperture Microphone Array. Sensors 2017, 17, 1089.

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