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Method and device for acquiring vehicle running speed

A technology of vehicle driving speed and vehicle driving, applied in the field of car driving recorders, can solve the problems of large driving speed calculation error and poor real-time performance, and achieve the effect of improving measurement accuracy

Inactive Publication Date: 2015-04-01
珠海天琴信息科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the main purpose of the embodiments of the present invention is to solve the problems of large calculation errors and poor real-time performance during the above-mentioned driving process.

Method used

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  • Method and device for acquiring vehicle running speed
  • Method and device for acquiring vehicle running speed
  • Method and device for acquiring vehicle running speed

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Embodiment Construction

[0030] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

[0031] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0032] Such as figure 1 As shown, the embodiment of the present invention provides a method for obtaining the driving speed of a vehicle, including the following steps:

[0033] S101, acquiring vehicle mileage pulses, and recording the mileage pulse number Nt of the mileage...

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Abstract

The embodiment of the invention provides a method and device for acquiring vehicle running speed. The method includes the following steps that: vehicle running mileage pulses are acquired, the mileage pulse number Nt of the running mileage pulses is recorded; a temporary speed value Vs in a predetermined period T is obtained, wherein the temporary speed value Vs=Nt*Pc*Vconst, wherein, Pc is a mileage pulse coefficient, and Vconst is a speed conversion constant; and the mid-value of temporary speed values Vs in N continuous predetermined periods T is adopted as a current speed value, wherein N is larger than or equal to 3. The invention also provides a device for acquiring vehicle running speed. The device includes a pulse counting unit, a temporary speed calculation unit and a speed acquisition unit. With the method and device of the invention adopted, problems of large error and poor real-time performance of running speed calculation in a running process can be solved.

Description

technical field [0001] The present application relates to the technical field of vehicle travel recorders, in particular to a method and device for obtaining vehicle driving speed. Background technique [0002] In the prior art, along with the increasingly developed electronic application system, in the current driving recorder and vehicle-mounted equipment, there are generally two calculation methods for the calculation of the real-time driving speed of the car: (1) by GPS real-time positioning technology , the principle of speed measurement is to use the continuous displacement change of latitude and longitude where the car is located to calculate the distance on the earth's surface, and calculate the speed value through the calculated displacement distance per unit time. (2) Using the mileage pulse coefficient set by the driving recorder or vehicle-mounted equipment at the factory, the number of pulses collected by the vehicle driving recorder can be multiplied by the num...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/50
Inventor 周杨波
Owner 珠海天琴信息科技股份有限公司
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