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http://dx.doi.org/10.5370/KIEE.2011.60.3.600

Field Test and Evaluation for a Wireless Vehicle Detector with Two Anisotropic Magneto-Resistive Sensors  

Kang, Moon-Ho (선문대 공대 정보통신공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.60, no.3, 2011 , pp. 600-605 More about this Journal
Abstract
This paper shows field test and evaluation results for a wireless vehicle detector with anisotropic magneto-resistive (AMR) sensors. The detector consists of two AMR sensors and mechanical and electronic apparatuses. The AMR sensor senses disturbance of the earth magnetic field caused by a vehicle moving over the sensor and then produces an output indicative of the moving vehicle. In this paper, vehicle speeds are calculated by using two AMR sensors fixed on a board, with constant distance. To test and evaluate the accuracy of the detector in real traffic situations, the detector was installed on a local highway and vehicle speeds and volumes were measured both in a free running and a highly congested traffic. The measurements from the detector are compared with the reference measurements obtained from a traffic camera with the Mean Absolute Percentage Errors (MAPE), which has proved the usefulness of the detector in the field.
Keywords
Wireless vehicle detector AMR sensor Vehicle speed; Vehicle volume; MAPE;
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