Method and device for automatically computing vehicle pulse factor via GPS (global positioning system) speed

Abstract

The invention relates to a GPS (global positioning system) vehicle travelling data recorder, in particular to a method and a device for automatically computing a vehicle pulse factor via GPS (global positioning system) speed. The method comprises the following steps: 1. searching for a time period T in conformity with the judging criteria; and 2. storing the speeds and pulse counts per second of the time period T in the time period T searched in the step 1 and computing the vehicle pulse factor R according to the following formula: R=(1000*P) / L, wherein L is the accumulated travelling distance in the time period T, namely the accumulated sum of all the travelling distances per second in the time period T, and L is equal to L1+L2+...Lt; and P is the accumulated pulse count in the time period T, namely the accumulated sum of all the pulse counts per second in the time period T, and P is equal to P1+P2+...Pt. The method has the advantages that the method is used for automatically computing and matching the vehicle pulse factor and correcting errors of the vehicle pulse factor of the GPS vehicle travelling data recorder and the accuracy of the computed vehicle pulse factor is high, thus improving the accuracy of computing the vehicle travelling speed and travelling distance via the vehicle pulse factor.

Description

technical field [0001] The invention relates to a GPS vehicle driving recorder, in particular to a method and device for automatic calculation, matching and error correction of vehicle pulse coefficients in the vehicle-mounted equipment of the GPS vehicle driving recorder. Background technique [0002] The rapid development of China's automobile and transportation industry market and its needs for comprehensive information services and safety prevention management provide a huge development space and opportunity for the comprehensive information service market of GPS vehicle driving recorders. Among them, the installation of the GPS vehicle driving recorder is an important link, and the calculation of the vehicle pulse coefficient in the installation process has become a key problem that the GPS vehicle driving recorder needs to solve. Among them, the definition of vehicle pulse coefficient: defined in the national standard "GB / T19056-2012 Vehicle Travel Recorder" as the num...

AI Technical Summary

Problems solved by technology

There are many disadvantages in the above method: First, because the vehicle pulse coefficient values ​​of different models or brands are not the same, when installing the GPS vehicle driving recorder on-board equipment, it is necessary to manually calculate and input the vehicle pulse coefficient values ​​one by one, and the installation efficiency is low. , which greatly increases the cost of manual installation; second, due to the need for manual operation to input the vehicle pulse coefficient value, the technical requirements for equipment installers have been improved, thereby increasing labor costs; third, it is necessary to calculate the vehicle pulse coefficient value after the calculation of the sports car, and manually follow the sports car , can not be installed in a centralized manner, which wastes time and also affects the normal operation of the vehicle, causing strong resistance to the owner; fourth, in practical applications, when the GPS car driving recorder is subject to strong external electromagnetic interference and radio frequency interference, it is inevitable that parameters will be lost. At this time, it is necessary to manually go to the site to calculate the input vehicle pulse coefficient again, which will increase equipment maintenance costs; fifth, the vehicle wheel is repaired and replaced, and the wheel diameter parameters may change, so the input vehicle pulse coefficient needs to be recalculated

[0005] However, the above-mentioned invention patent with the application number 201210079620.X mainly solves the technical problem through the vehicle-mounted camera and various sensors to improve the positioning accuracy, rather than automatically calculating and correcting the vehicle pulse coefficient, so the above-mentioned invention patent does not mention specific The specific calculation method of the vehicle speed pulse coefficient; in addition, the correction of the vehicle speed pulse coefficient is to judge whether there is a difference based on the distance between intersections and the map information, and no clear comparison method has been proposed, whether it can be implemented and whether it has obtained a good result. The effect of the correction is yet to be verified

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