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Method for acquiring real-time vehicle speed of motor vehicle

A motor vehicle and vehicle speed technology, which is applied to vehicle components, circuits or fluid pipelines, transportation and packaging, etc., can solve the problems of insignificant vehicle speed effect, too large display number jumping, and fast response speed, so as to reduce visual fatigue and reduce visual fatigue. Display data smoothly and reliably

Inactive Publication Date: 2015-01-21
BEIJING CASUE TECH
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  • Description
  • Claims
  • Application Information

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

Method used

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  • Method for acquiring real-time vehicle speed of motor vehicle
  • Method for acquiring real-time vehicle speed of motor vehicle
  • Method for acquiring real-time vehicle speed of motor vehicle

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Embodiment Construction

[0012] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0013] This embodiment provides a method for measuring and calculating the real-time vehicle speed of an automobile. When the car is moving, the speed signal n of the speed sensor is collected within a period of time △t. The distance traveled by each pulse is △d. The real-time speed can be measured and calculated by applying the variable sampling rate algorithm so that the output shows the real-time speed value. It can quickly respond to the actual change of the vehicle speed, and can make the displayed data stable and reliable. It greatly reduces the visual fatigue of watching the display while driving, and facilitates the driver to know the speed of the vehicle.

[0014] figure 1 A flow chart of a method for obtaining the real-time vehicle speed of a motor veh...

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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 for obtaining the 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 of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R16/02
Inventor 彭崇梅勾传龙彩虹袁国顺
Owner BEIJING CASUE TECH
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