The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

A Vehicle Speed Detector Using AMR Sensors

AMR 센서를 이용한 차량 속도 검지기

  • 강문호 (선문대 공대 정보통신공학부) ;
  • 박윤창 (선문대 공대 정보통신공학부)
  • Published : 2009.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper proposes a vehicle speed detector with anisotropic magnetoresistive (AMR) sensors and addresses experimental results to show the performance of the detector. 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 built on a board. The speed of a vehicle is calculated by dividing the known distance between the two sensors with the time difference between two output signals from each sensor, captured sequentially while the vehicle is driving over the sensors. Some field tests have been carried to show the performance of the proposed detector and its usefulness.

Keywords

References

  1. A. P. Gribbon, 'Field test of nonintrusive traffic detection technologies,' Mathl. Comput. Modelling, vol. 27, no. 9-11, pp. 349-352, 1998 https://doi.org/10.1016/S0895-7177(98)00069-7
  2. 문학룡 외, '레이저를 이용한 교통데이터 수집장치 개발에 관한 연구' 대한전기학회 하계학술대회 논문집, pp. 680-682, 1999
  3. 양승훈, 한경호, '루프검지기와 피에조 센서를 이용한 교통정보 수집시스템 설계' 대한전기학회 하계학술대회 논문집 pp. 2956-2958, 2000
  4. Herry R. Sampey, 'Method and apparatus for analyzing traffic and a sensor therefore,' United State Patent, Patent Number 5,877,705 Mar. 2, 1999
  5. M. H. Kang, et aI, 'Experimental study of a vehicle detector with an AMR sensor,' Sensors and Actuators A: Physical, vol. 118, issues 2, 28 February, pp. 278-284, 2005 https://doi.org/10.1016/j.sna.2004.09.002
  6. Sing-Yiu Cheung, Pravin Varaiya, Traffic Surveillance by Wireless Sensor Networks: Final Report, UCB-ITS-PRR-2007-4, California PATH Research Report, 2007
  7. P. Ripka, et aI, 'AC-driven AMR and GMR magnetoresistors,' Sensors and Actuators A: Physical, vol.76, issues 1-3, 30 Aug, pp.225-230, 1999 https://doi.org/10.1016/S0924-4247(99)00034-5
  8. M. Vopalensky, P. Ripka, A. Platil, 'Precise magnetic sensors,' Sensors and Actuators A: Physical, vol. 106, issues 1-3, 15 September, pp. 38-42, 2003 https://doi.org/10.1016/S0924-4247(03)00129-8
  9. Honeywell, 1- and 2-Axis Magnetic Sensors, HMC 1001/1002 and HMC1021/1022, Datasheet 900248
  10. Philips Semiconductors, General Magnetic Field Sensors, Datasheet, Jun 12, 1998
  11. V. W.S. Tang, et aI, 'An Intelligent Car Park Management System based on Wireless Sensor Networks', 1st International Symposium on Pervasive Computing and Applications, pp. 65-70, 2006
  12. Joerg Wolff, et aI, 'Parking monitor system based on magnetic field sensors', Proceedings of the IEEE ITSC2006, Toronto, Canada, September 17-20, pp. 1275-1279, 2006