Method and device for acquiring real-time vehicle speed of motor vehicle

Abstract

The invention discloses a method and a device for acquiring the real-time vehicle speed of a motor vehicle, belonging to the technical field of automobiles. The method comprises the following steps of: acquiring speed pulse signals and accumulating in the running process of the motor vehicle, and reading a speed pulse signal accumulated value according to a high sampling rate; acquiring the real-time vehicle speed of the motor vehicle according to the accumulated value; if a difference value between the real-time vehicle speed acquired at the high sampling rate and a vehicle speed acquired at a previous time is in a vehicle speed change threshold value range, continually accumulating speed pulse signals, and acquiring a real-time vehicle speed according to a low sampling rate for serving as a current real-time vehicle speed; otherwise, determining the real-time vehicle speed acquired at the high sampling rate as a current real-time vehicle speed; and outputting and displaying the current real-time vehicle speed. The device comprises an accumulating unit, a real-time vehicle speed acquisition unit, a current real-time vehicle speed judging unit, and an outputting and displaying unit. Due to the adoption of the method and the device, the visual fatigue of a driver watching a display during driving is reduced greatly, and the driver can know the situation of vehicle advancing speed conveniently.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method and device for acquiring real-time vehicle speed of a motor vehicle. Background technique [0002] In order to make the driving of motor vehicles more intelligent, humanized, and fun, some cars in the automobile market are equipped with on-board display devices to display real-time speed and other driving information. However, these devices have the following problems. Either the calculation of the vehicle speed is the integral of the speed signal for a certain period of time, and the effect of real-time response to the vehicle speed is not obvious, and the driver cannot obtain accurate real-time information; If it is too fast, the displayed numbers of the calculation output will jump too much, which will make it difficult for the driver to observe and identify the real-time vehicle speed information. Contents of the invention [0003] In view of this, the object ...

AI Technical Summary

Problems solved by technology

However, these devices have the following problems. Either the calculation of the vehicle speed is the integral of the speed signal for a certain period of time, and the effect of real-time response to the vehicle speed is not obvious, and the driver cannot obtain accurate real-time information; If it is too fast, the displayed numbers of the calculation output will jump too much, which will make it difficult for the driver to observe and identify the real-time vehicle speed information

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