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Method, device, processor and road testing unit for base line direction-finding

A baseline and direction-finding technology, applied in the field of intelligent transportation, can solve the problem of low direction-finding accuracy

Active Publication Date: 2014-04-16
SHENZHEN GENVICT TECH
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a baseline direction finding method, device, processor and drive test unit to solve the problem of low direction finding accuracy in the prior art. The specific implementation is as follows:

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  • Method, device, processor and road testing unit for base line direction-finding
  • Method, device, processor and road testing unit for base line direction-finding
  • Method, device, processor and road testing unit for base line direction-finding

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0055] The invention discloses a baseline direction-finding method to solve the problem of low direction-finding accuracy existing in the prior art when performing baseline direction-finding. see figure 1 As shown in the workflow diagram, the baseline direction finding method includes:

[0056] Step S11, determine any direction as the calibration direction, and obtain direction-finding parameters, the direction-finding parameters include: the angle between each ba...

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Abstract

The invention relates to the field of intelligent transportation systems, and discloses a method, device, processor and road testing unit for base line direction-finding. According to the method, a calibration direction is firstly determined, and direction-finding parameters are obtained; phase differences and lengths of all base lines projected on the calibration direction according to the parameters are obtained, and according to the phase differences and lengths on the calibration direction, base line measured angles of the base lines are obtained; all obtained base line measured angles are subjected to weight fusion and are compared with incidence angles in the direction-finding parameters, weight needed in the weight fusion is obtained according to the comparison result, and according to the direction-finding angles of electromagnetic signals on the calibration direction are obtained according to the weight, direction-finding of a vehicle is achieved. By means of the method, the base lines in different directions are projected to the needed calibration direction, the base line measured angles of all base lines are obtained according to the phase differences and lengths, so that when direction finding is carried out, the base lines in different directions are utilized, and direction-finding precision is improved.

Description

technical field [0001] The invention relates to the field of intelligent transportation, in particular to a baseline direction finding method, device, processor and road testing unit. Background technique [0002] In the field of ETC (Electronic Toll Collection, intelligent transportation), it is often necessary to measure the direction of the vehicle in order to locate the position of the vehicle. [0003] In the ETC system, the devices used for direction finding include: OBU (On board Unit, on-board equipment), antenna array and background controller. Any two antenna elements in the antenna array form a baseline. During direction finding, the OBU generates an electromagnetic wave signal, and each element in the antenna array receives the electromagnetic wave signal, and the background controller obtains each baseline in the same direction. , the phase difference generated after receiving the electromagnetic wave signal is weighted and averaged, so as to obtain the average...

Claims

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Application Information

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IPC IPC(8): G01S3/14
CPCG01S3/143
Inventor 杨耿黄日文张学诚俞明良
Owner SHENZHEN GENVICT TECH
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