Geomagnetic parking space detection method

Abstract

The invention discloses a geomagnetic parking space detection method. The method includes the steps that S1, geomagnetic data is collected; S2, the geomagnetic variation Ts is calculated; S3, the zi-axis fluctuating quantity delta theta i is calculated; S4, whether the Ts is larger than the minimum noise threshold Tn or not is judged, and if yes, S5 is executed; S5, whether the delta theta i is larger than the z-axis fluctuation threshold value theta n or not is judged, and if yes, S6 is executed; S6, whether the Ts is larger than the vehicle reference quantity Th or not is judged, and if yes,S7 is executed; S7, whether a vehicle ruler is recorded or not is judged, if not, S8 is executed, and if yes, S9 is executed; S8, whether the Ts is smaller than the Th or not is judged, and if yes, S10 is executed; S9, whether the Ts is larger than the Tn or not is judged, and if yes, S11 is executed; S10, whether the z-axis change direction is opposite to the that when a vehicle exists, and if yes, the vehicle leaves; S11, whether the delta theta i is larger than the theta n or not is judged, and if yes, S12 is executed; S12, whether the Ts is smaller than the Th or not is judged, if yes, S10 is executed, and a vehicle-free ruler is updated and recorded. According to the method, on the basis of setting threshold value comparison, entering into and exiting from a parking space of the vehicle are judged by detecting the fluctuation angle of the z axis, so that the stability and accuracy of detection results can be improved.

Description

technical field [0001] The invention relates to the technical field of vehicle management, in particular to a geomagnetic parking space detection method. Background technique [0002] The full name of a parking space is a parking space, which refers to a place for parking vehicles, including open spaces and indoor spaces. At present, most parking space detection methods use geomagnetic sensors to detect ground parking spaces. The geomagnetic sensor mainly uses the principle that the vehicle will cause the change of the earth's magnetic field to realize the detection of the vehicle. Specifically, it compares the change of the geomagnetic signal detected by the geomagnetic sensor with the set threshold to determine whether there are wheels parked. However, in different vehicle models and different environments, the geomagnetic signal detected by this detection method will be greatly disturbed, which is not conducive to the stability and accuracy of the judgment result. [00...

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Problems solved by technology

However, in different vehicle models and different environments, the geomagnetic signal detected by this detecti

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