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Inflection point compensation of vehicle track information

A vehicle trajectory and inflection point technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problems of large data upload volume and easy misjudgment, and achieve the effect of overcoming false positives and reducing the amount of transmitted data

Inactive Publication Date: 2014-04-02
CHENGDU YIMENG HENGXIN TECH
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AI Technical Summary

Problems solved by technology

[0007] In order to overcome the technical defects of large data upload volume and easy misjudgment in places with small turning curvature radius existing in the acquisition and measurement of the existing vehicle trajectory at the corner, the invention discloses a method for measuring the vehicle trajectory with inflection point compensation

Method used

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  • Inflection point compensation of vehicle track information

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Embodiment Construction

[0016] Specific embodiments of the present invention will be further described in detail below.

[0017] An inflection point compensation measurement method of a vehicle track, comprising a vehicle state judgment step, an inflection point judgment step, and a data upload step, the inflection point judgment step comprising: continuously measuring the turning angle between every two points, and calculating the turning of N consecutive measurement points The sum of the angles α, if |α|>β, it is considered to enter the turning state; the data uploading steps are: after entering the turning state, upload the interval data with a frequency of K1, and when the turning state is over, the data uploading will return to the default Frequency K0, said K1 is greater than K0; said β is a preset angle threshold.

[0018] The vehicle state judging step judges whether the vehicle is moving or stationary. When the vehicle is in a moving state, the inflection point is judged. In the present inve...

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Abstract

The invention discloses an inflection point compensation measurement method of vehicle track information. The method comprises a vehicle state judging step, an inflection point judging step and a data uploading step, wherein the inflection point judging step comprises: continuously measuring the turning angle between each two points, calculating the sum alpha of the turning angles of N continuous measurement points, and determining to enter a turning state if the absolute value of alpha is larger than beta; the data uploading step comprises: intermittently uploading data with frequency K1 after entering the turning state, and recovering the data uploading frequency to default frequency K0 when the turning state is finished, wherein K1 is larger than K0; beta is a preset angle threshold, and N is a preset judging number. By adopting the inflection point compensation measurement method of vehicle track information disclosed by the invention, the inflection point compensation mechanism is increased on the basis of isochronous or equidistant collection, a collection point is increased only when vehicle turning is detected so as to reduce the transmission data size of GPRS (General Packet Radio Service), and angles of continuous sampling points are accumulated and calculated to overcome the possible misinformation under small curvature and large turning radius.

Description

technical field [0001] The invention belongs to the field of traffic equipment and relates to a method for measuring an inflection point compensation of a vehicle track. Background technique [0002] The geographic information positioning system is composed of four parts: space satellites, user receiving equipment, wireless data communication equipment and ground monitoring and control equipment. The positioning module can determine the accurate data of the location of its own receiver by receiving satellite signals. These data information are transmitted to the control and command center through the wireless data transmission system, and the equipment in the control and command center performs data analysis and processing, and passes through the central system. The configured geographic information system and high-resolution electronic display display the real-time position of the positioning module on the electronic map. [0003] Usually, the cycle of sampling data genera...

Claims

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Application Information

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IPC IPC(8): G01C21/26G01S19/42
CPCG01C21/20
Inventor 王春波廖贵发
Owner CHENGDU YIMENG HENGXIN TECH
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