Error early warning system and early warning method for actual vehicle speed and vehicle speed displayed by combination instrument

Abstract

The invention discloses an error early warning system for actual vehicle speed and vehicle speed displayed by a combination instrument. The system comprises a detection unit, a storage unit, a calculation unit and a control unit. The detection unit comprises a displacement signal transmitter and a time signal transmitter. The storage unit is used for storing sending signal data information of the displacement signal transmitter and sending signal data information of the monitoring time signal transmitter. The calculation unit is used for calculating the ratio of the two-point interval displacement difference of the displacement signal transmitter to the two-point interval time difference corresponding to the time signal transmitter. An execution unit comprises an alarm device, and the alarm device is divided into a first audible and visual alarm and a second audible and visual alarm. According to the invention, the problems that the loading test increases the workload and causes low efficiency because whether the actual vehicle speed and the display vehicle speed meet the design specification or not is often required to be verified during the current instrument development are solved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an error pre-warning system and a pre-warning method for an error between an actual vehicle speed and a vehicle speed displayed by a combination instrument. Background technique [0002] The combined instrument is the window for the driver to grasp the vehicle information. The instrument can accurately display the vehicle status, except for the speed information. The actual vehicle speed must be lower than the displayed speed of the instrument and meet certain specification requirements. When the vehicle speed deviates too high, it is easy to cause misjudgment to the driving user, and even serious safety accidents in severe cases. [0003] Therefore, in the development of instruments, it is often necessary to install the vehicle to verify whether the actual vehicle speed and the displayed vehicle speed meet the design specifications. The loading test increases the workload, r...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide an error early warning system and early warning method between the actual vehicle speed and the vehicle speed displayed by the combination instrument, and to solve the problem of whether the actual vehicle speed and the displayed vehicle speed are often required to be verified when the current instrument is developed. To meet the design specifications, the loading test increases the workload, resulting in low efficiency

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