Microwave vehicle detection device and method based on geomagnetism guidance

Abstract

The invention relates to a microwave vehicle detection device and method based on geomagnetism guidance. The device comprises a geomagnetism detection unit, a microwave detection unit and a signal data processing unit. The signal data processing unit completes detection of a vehicle by performing transformation processing on signals outputted by the geomagnetism detection unit and the microwave detection unit. Vehicle magnetic field and microwave integrated detection is realized in a quite small volume by utilizing the advantage of high sensitivity of geomagnetism detection with combination of a microwave vehicle detection technology so that detection precision is enhanced, and detection accuracy can be 99.9%. The microwave detection unit only works when the vehicle is driven out or driven in so that power consumption of the microwave detection unit is reduced, the service life of hardware is prolonged, and the microwave detection unit can be used on battery powered equipment for a long time. The microwave detection unit realizes detection of the static vehicle by a mode of performing direct demodulation on microwave signals so that the hardware device of the microwave detection unit is simplified.

Description

technical field [0001] The invention belongs to the field of intelligent transportation, and in particular relates to a microwave vehicle detection device and method based on geomagnetic guidance applied in urban roads or parking lots. Background technique [0002] Vehicle detectors have a very wide range of applications in the field of intelligent transportation. There are two traditional vehicle detection methods: one is to sense the passage of vehicles by embedding coils in the road. In the absence of motor vehicles, the earth's magnetic field is relatively stable; when a motor vehicle passes by, it will cause changes in the earth's magnetic field. This method has a high accuracy rate, but the construction workload is heavy, and due to the need to cut a large road surface, the damage to the road is very serious. Another method is to use magnetic sensitive elements to detect changes in the magnetic field caused by vehicles. The detection equipment in this method has hig...

AI Technical Summary

Problems solved by technology

The disadvantage of this detection method is that only the echo information of moving targets can be obtained. For stationary targets, the processor cannot distinguish target echoes from background echoes. Therefore, this detection scheme cannot detect stationary vehicles in the parking lot.

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