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

Author

Uchiyama, T. ; Mohri, K. ; Itho, H. ; Nakashima, K. ; Ohuchi, J. ; Sudo, Y.

Author_Institution

Dept. of Electr. Eng., Nagoya Univ., Japan

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3670

Lastpage

3672

Abstract

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

Keywords

CMOS memory circuits; automated highways; computerised monitoring; magnetic sensors; magnetostrictive devices; road traffic; traffic information systems; IC memory; amorphous wire CMOS magnetoimpedance sensor; automatic traffic measurements; car length; car sensing system; car traffic monitoring system; car velocity; cross correlation function; microcomputer; pick up coil type sensor; road-set built-in disk; signal processing; stray fields; Amorphous magnetic materials; Amorphous materials; Magnetic sensors; Microcomputers; Monitoring; Prototypes; Roads; Sensor systems; Signal processing; Wire;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908936

Filename

908936