Method for improving vehicle-mounted speed chart through GPS speed information
The invention relates to a method for improving a vehicle-mounted speed chart through GPS speed information. The method includes the steps of collecting accurate speed information measured by a GPS under an open environment and the vehicle-mounted speed information of a vehicle-mounted speed collect...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | The invention relates to a method for improving a vehicle-mounted speed chart through GPS speed information. The method includes the steps of collecting accurate speed information measured by a GPS under an open environment and the vehicle-mounted speed information of a vehicle-mounted speed collecting device to obtain a complementation coefficient, and correcting the vehicle-mounted speed information of the vehicle-mounted speed collecting device through the complementation coefficient when measurement of the GPS is not accurate. By means of the method, the defect that the vehicle-mounted speed accuracy is influenced by various factors is overcome; for instance, the defect that the vehicle-mounted speed measurement error occurs when the actual perimeter and the calibrated perimeter of a tyre are not consistent is overcome; meanwhile, the GPS measurement accuracy is prevented from being influenced by a complex environment. |
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