Vehicle detection device based on geomagnetic sensor array

Abstract

The invention relates to a vehicle detection device based on a geomagnetic sensor array. The vehicle detection device based on a geomagnetic sensor array comprises a geomagnetic detection unit, a geomagnetic signal conditioning circuit, a data acquisition unit, a microprocessor, a memory cell and a wireless emission module. Changes of a magnetic field are caused because of disturbance of the surrounding magnetic field during the vehicle driving process can be detected by a plurality of geomagnetic sensors which are arranged in an array and are mounted in a vehicle detection device on the surface of a road on a lane line; a detection signal can be input into the microcontroller through the signal conditioning circuit; the microcontroller can process the geomagnetic data according to an interpolation method and a double-window vehicle detection algorithm so as to obtain the information of speed and length of a vehicle; and the information is input into the memory cell for storage, and can be sent through the wireless emission module. The vehicle detection device based on a geomagnetic sensor array utilizes a geomagnetic detection principle to detect vehicles, and is not influenced by weather factors, such as rain, snow and fog, and has the advantages of being abundant in the obtained traffic parameter information, avoiding damaging the road, being simple in installation and maintenance, being stable in operation, being small in volume, being low in cost, being low in power consumption, and being convenient for networking.

Description

technical field [0001] The invention relates to a vehicle detector applied in the field of intelligent transportation, in particular to a vehicle detection device based on a geomagnetic sensor array. Background technique [0002] When the vehicle is running on the road, it will release heat, sound, magnetic and other signals. Traffic detectors are used to detect moving vehicles by detecting one or several signals. According to the types of detection sensors used in traffic detectors, they can be divided into pressure, acceleration, magnetic field, inductance, ultrasonic, frequency, photoelectric, image sensing, etc. They detect the time, size or image of a vehicle passing through a certain interface by sensing, converting and transmitting relevant physical quantities, and transmit it to the processing unit. The processing unit converts these transmitted physical quantities into vehicle element information (such as the number of axles, wheelbase, vehicle size, etc.) and roa...

AI Technical Summary

Problems solved by technology

[0004] At the same time, the signal source of traditional vehicle detection technology is relatively single, and the detection results are affected by factors such as the distance, angle and relative position between the detector and the vehicle, and the environmental adaptability of the detector to work in different road environments is not strong

[0005] At the same time, in these traffic data collection and classification systems, there are still shortcomings such as insufficient classification of vehicle types and insufficient accuracy of parameter measurement.

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