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Abstract

The invention discloses a method for vehicle classification using multiple geomagnetic sensors, which mainly solves the problems of high cost, complex processing process and difficulty in large-scale deployment of the existing vehicle classification methods. The method comprises the following steps: sequentially deploying N geomagnetic sensors on a road side at equal intervals d, each of the geomagnetic sensors respectively collecting magnetic field data around same, respectively transmitting the magnetic field data to a data processing module for storage, and judging whether a vehicle passes over a detection range of the sensors or not according to the data; calculating a time difference obtained when the vehicle passes by two adjacent sensors among N sensors, and calculating the vehicle speed and the vehicle magnetic length according to the time difference; setting a vehicle magnetic length double-threshold value and a Z axis magnetic field strength threshold value, acquiring Z axis geomagnetic data and the magnetic length that the vehicle passes by, comparing the Z axis geomagnetic data and the magnetic length that the vehicle passes by with the set threshold value, and acquiring a judged vehicle type result. According to the invention, the vehicle type information of the vehicle passing by can be accurately acquired, the reliability is high, the cost is low, large-scale deployment is easy to realize, and the method can be used for highway intellectualization.

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First Claim