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Car traffic monitoring system using MI sensor built-in disk set on the road

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6 Author(s)
Uchiyama, T. ; Dept. of Electr. Eng., Nagoya Univ., Japan ; Mohri, K. ; Itho, H. ; Nakashima, K.
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A new car sensing system using an amorphous wire CMOS magneto-impedance (MI) sensor built into a disk set on the road is presented. When a car passes above the disk, the MI sensor detects stray fields from the car body. The speed and length of a car can be estimated processing the signals from two MI sensors. A prototype disk with two MI sensors, a microcomputer, and a semiconductor IC memory built-in has been developed. The disk system can record the length, the velocity and the time when a car passed for two thousand cars. The proposed sensing system is useful for automatic traffic measurements

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Magnetics, IEEE Transactions on  (Volume:36 ,  Issue: 5 )