Antenna Beamwidths of Above-The-Road Radar for Traffic Speed Enforcement in China
Joint Authors
Hu, Hongbo
Du, Lei
Zhang, Yue
Cai, Changqing
Sun, Qiao
Source
International Journal of Antennas and Propagation
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-08-01
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Above-The-Road (AbTR) radar is a new type of speed measurement device used in China for traffic speed enforcement.
The antenna beamwidths in vertical and horizontal directions are critical parameters for AbTR radar because speed measurement accuracy partly depends on vertical beamwidth and speed measurement interference from adjacent lanes can be effectively minimized by appropriate choice of horizontal beamwidth.
In this paper, the speed measurement principle of AbTR radar is introduced and the reason for field speed measurement error is presented.
The speed measurement error is theoretically calculated in various combinations of different vertical beamwidths and possible installation angles.
The requirement for horizontal beamwidth to operate with less interference from adjacent lanes is also theoretically laid down with different installation heights and angles.
Field tests with three equal-distanced piezosensors each lane as triggering references have been performed on an AbTR radar sample with vertical beamwidth 5.1° and horizontal beamwidth 5.2°.
The results of theoretical analysis and field tests validate that the requirement of less than 6° for AbTR radar antenna beamwidths in vertical and horizontal directions is a precondition for accurate and reliable field measurements, which has been added to the China’s pattern approval regulation for AbTR radar devices newly published.
American Psychological Association (APA)
Du, Lei& Sun, Qiao& Cai, Changqing& Zhang, Yue& Hu, Hongbo. 2012. Antenna Beamwidths of Above-The-Road Radar for Traffic Speed Enforcement in China. International Journal of Antennas and Propagation،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-475947
Modern Language Association (MLA)
Du, Lei…[et al.]. Antenna Beamwidths of Above-The-Road Radar for Traffic Speed Enforcement in China. International Journal of Antennas and Propagation No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-475947
American Medical Association (AMA)
Du, Lei& Sun, Qiao& Cai, Changqing& Zhang, Yue& Hu, Hongbo. Antenna Beamwidths of Above-The-Road Radar for Traffic Speed Enforcement in China. International Journal of Antennas and Propagation. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-475947
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-475947