| Title |
Design of Anisotropic Magnetoresistance Sensor Module for Vehicle Detection |
| Authors |
Hak-Yun Choi ; Hyeong-Il Lee |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2011.25.8.099 |
| Keywords |
AMR ; Magnetic Sensor ; EMF ; Helmholtz Coil |
| Abstract |
This paper is about the design of 3-axis magnetic sensor module which detects parking and moving vehicle. For the sensor module, MR Sensor from Honeywell of which maximum measurement range is ±2[G] is used. It also consisted of amplifier and sensor filter and fabricated 30×50[㎜] PCB. Fabricated sensor module produced helmholtz coil of which the length is 1.2[m] of 3-axis to know the performance. It installed sensor module at the center and measured the detected magnetic field. In result, 3-axis were detected as 0.2∼0.3[mG] and the drift of the fluctuation of magnetic field was stabilized at 0.03[mG] unit. For the performance evaluation of the vehicle detection, after the entry and parking of the vehicle, variation of magnetic field was measured as 0.323∼0.695[G] which the average 0.5[G] of the earth magnetic field was the center and the range of variation was confirmed as 0.37[G]. Therefore, the designed magnetic sensor can be used as the vehicle detection sensor module. |