GPS inflexion compensation method

A compensation method and an inflection point technology, applied in the field of GPS inflection point compensation, can solve the problems of increased communication costs, large calculation errors of driving kilometers, and inability to fully reflect the turning trajectory, and achieve the effect of reducing the amount of transmitted data

Inactive Publication Date: 2009-10-28
SHANGHAI TANWAY INTELLIGENT TRAFFIC SYST EQUIP
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Problems solved by technology

However, if the GPS data is transmitted to the monitoring platform through GPRS, if the cycle is 1 second, the data transmission will be too frequent, the GPRS traffic will be large, and the communication cost will be increased. Therefore, most monitoring devices use 10 seconds. In most cases, the sampling point of 10 seconds can ba

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Embodiment Construction

[0009] Below in conjunction with specific embodiment the present invention is described in further detail:

[0010] The present invention is realized through the following steps:

[0011] In 3 consecutive GPS signal points received, the angle change per second exceeds 10 degrees;

[0012] It is defined to enter the turning state. In this state, if the movement distance exceeds 15 meters, or the time exceeds 5 seconds, a sampling point will be recorded.

[0013] The position of the turning point can be sampled through the present invention.

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Abstract

The invention relates to a GPS inflexion compensation method which is realized through the following steps: defining the entry of turning state and recording a sampling point if the motion distance exceeds 15 meters or the time exceeds five seconds under the turning state when the angle change per second in three received GPS continuous signal points exceeds ten degrees. The invention has the advantages that an inflexion compensation mechanism is added on the basis of isochronous or equidistant acquisition, sampling points are increased when vehicle turning is detected, so that the transmission data amount of GPRS is reduced.

Description

technical field [0001] The invention relates to a GPS inflection point compensation method. Background technique [0002] As we all know, GPS data is one sampling point per second, and the running trajectory drawn at such a frequency will be very smooth. However, if the GPS data is transmitted to the monitoring platform through GPRS, if the cycle is 1 second, the data transmission will be too frequent, the GPRS traffic will be large, and the communication cost will be increased. Therefore, most monitoring devices use 10 seconds. In most cases, the sampling point of 10 seconds can basically reflect the running track of the vehicle. [0003] However, when the vehicle turns at the intersection, due to the loss of sampling points, the turning trajectory cannot be fully reflected. The details of driving and turning are not well collected, and it also causes the calculation error of the driving kilometers to increase. Contents of the invention [0004] The technical problem to...

Claims

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Application Information

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IPC IPC(8): G01S1/04G01S5/02G01C21/26
Inventor 杨辰曲周建武牛波
Owner SHANGHAI TANWAY INTELLIGENT TRAFFIC SYST EQUIP
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