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A novel system for measuring vehicle speed via analog signals of pyroelectric infrared sensors

Department of Precise Mechanical and Optical Engineering, Hanoi University of Science and Technology, Hanoi 10000, Vietnam

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Vu Toan Thang

Department of Precise Mechanical and Optical Engineering, Hanoi University of Science and Technology, Hanoi 10000, Vietnam

E-mail Address: thang.vutoan@hust.edu.vn

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https://doi.org/10.1142/S0217979221400282Cited by:3 (Source: Crossref)

This article is part of the issue:

Special Issue on the Physics and Mechanics of New Materials and Their Application
Guest Editors: Prof. Yun-Hae Kim, Prof. Nao-Aki Noda, Prof. Ivan A. Parinov, Prof. Shun-Hsyung Chang and Dr. Pankaj Koinkar

Abstract

This paper presents a method of measuring transportation vehicle’s speed via analog signals of a couple of pyroelectric infrared sensors. The measuring system is located along the roadside with the assumption that optical axes of the sensors are parallel to each other and perpendicular to the moving direction of vehicles. A cross-correlation method combined with interpolation has been used in order to determine the time delay between two output signals, thus defining the traveling speed of the target. The experiment results show that the proposed method has an error of less than 5 km/h over the speed range of 20–90 km/h.

Keywords:

PACS: 06.20.−f, 07.07.Df, 07.57.Ty

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