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

The Korean Institute of Electrical Engineers (대한전기학회)
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Performance Analysis of an Anisotropic Magnetoresistive Sensor-Based Vehicle Detector

Anisotropic Magnetoresistive 센서를 이용한 차량 검지기의 성능분석

  • 강문호 (선문대 공대 정보통신공학부)
  • Published : 2009.03.01
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Abstract

This paper proposes a vehicle detector with an anisotropic magnetoresistive (AMR) sensor and addresses experimental results to show the detector's performance. The detector consists of an AMR sensor and mechanical and electronic apparatuses. The AMR sensor, composed of four magnetoresistors, senses disturbance of the earth's magnetic field caused by a vehicle moving over the sensor and then produces an output indicative of the moving vehicle. This paper verifies performance of the detector on the basis of experimental results obtained from the field tests carried under the two traffic conditions on local highways in Korea. First, I show the vehicle counting performance on a low speed congested highway by comparing the vehicle counts measured by the detector with the exact counts. Second, both vehicle counts and average speeds calculated from the measured point-occupancy on another continuously free running highway are compared with the reference values obtained from a loop detector which has two independent loop coils, where I have used several performance indices including mean absolute percentage error (MAPE) to show the performance consistency between the two types of detectors.

Keywords

References

  1. R. Weil, J. Wootton, A. Garcia-Ortiz, 'Traffic incident detection: sensors and algorithms,' Mathl. Comput. Modelling, vol. 27, no. 9-11, 1998, pp. 257-291 https://doi.org/10.1016/S0895-7177(98)00064-8
  2. A. P. Gribbon, 'Field test of nonintrusive traffic detection technologies,' Mathl. Comput. Modelling, vol. 27, no. 9-11, 1998, pp. 349-352 https://doi.org/10.1016/S0895-7177(98)00069-7
  3. Herry R. Sampey, 'Method and apparatus for analyzing traffic and a sensor therefore,' United State Patent, Patent Number 5,877,705 Mar. 2, 1999
  4. J. I. Ko, 'A new loop detector for improving low speed performance,' Master's thesis, Seoul Nat. Univ., Jan., 2000
  5. Jiagen (Jason) Ding, Sing-Yiu Cheung, Chin-Woo Tan and Pravin Varaiya, 'Signal processing of sensor node data for vehicle detection,' 2004 IEEE Intelligent Transportation Systems Conference Washington, D.C., USA, October 3-6, 2004, pp.70-75 https://doi.org/10.1109/ITSC.2004.1398874
  6. Moon Ho Kang, Byoung Wook Choi, Kyung Chul Koh, Jae Ho Lee, Gwi Tae Park, 'Experimental study of a vehicle detector with an AMR sensor,' Sensors and Actuators A: Physical, vol. 118, issues 2, 28 February, 2005, pp. 278-284 https://doi.org/10.1016/j.sna.2004.09.002
  7. Michal Vopalensky, Pavel Ripka, Antonin Platil, 'Precise magnetic sensors,' Sensors and Actuators A: Physical, vol. 106, issues 1-3, 15 September, 2003, pp. 38-42 https://doi.org/10.1016/S0924-4247(03)00129-8
  8. P. Ripka, M. Tondra, J. Stokes and R. Beech, 'AC-driven AMR and GMR magnetoresistors,' Sensors and Actuators A: Physical, vol. 76, issues 1-3, 30 August, 1999, pp. 225-230 https://doi.org/10.1016/S0924-4247(99)00034-5
  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