Traffic state detection method and device based on earth magnetic field induction

Abstract

The invention discloses a traffic state detection method and device based on earth magnetic field induction. The traffic state detection method includes the steps that a geomagnetism vehicle detector collects the change curve of a magnetic field when a vehicle passes, curve signals are preprocessed firstly, and then the feature value is extracted; after feature value extraction is finished for the geomagnetism vehicle detector, a data package is formed and transmitted to a wireless data receiver through a wireless network, the wireless data receiver carries out related calculation after receiving the detection data of all lanes and obtains the needed traffic state judgment parameters, and a traffic state judgment rule database is matched according to the traffic state parameters to carry out traffic state judgment and prediction. The traffic state detection method and device based on earth magnetic field induction can work in an all-weather mode, are not affected by environmental changes, realize global coverage and are advanced in technology, small in size, low in power consumption and simple in construction.

Description

technical field [0001] The invention relates to the field of traffic operation state monitoring, in particular to a traffic state detection method and device based on earth magnetic field induction. Background technique [0002] With the development of the economy, the number of domestic motor vehicles has increased rapidly, which has brought severe challenges to urban traffic. In order to make urban traffic smooth and comfortable, the collection of traffic information becomes a key link. The traffic information detector is to use the traffic information collection technology to monitor the traffic conditions on the road surface in real time, and grasp the dynamic changes of traffic flow from the macro and micro in time. Among the existing traffic information collection technologies, the induction coil detection technology or piezoelectric detection technology can truly work around the clock. However, in engineering applications, the coil is easily crushed, and the piezoel...

AI Technical Summary

Problems solved by technology

However, in engineering applications, the coil is easy to be crushed, and the piezoelectric equipment is easy to break down and difficult to maintain.

However, geomagnetic detection technology has been used in traffic flow detection reports, but it has not been directly used for traffic state discrimination.

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