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OBU positioning method, device and system and RSU

A positioning method and technology for positioning signals, applied in the field of OBU positioning of roadside units and on-board units, can solve the problems of low overall positioning capability of RSU, large positioning error of OBU, and poor signal-to-noise ratio of compensation signals.

Pending Publication Date: 2022-05-13
BEIJING WANJI TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, according to the current OBU positioning method, when the OBU is far away from the calibration position, the incident direction of the compensation signal will deviate from the normal direction of the RSU
Especially when the incident direction of the compensation signal deviates greatly from the normal line of the beam, it may form a signal zero depth in the array antenna of the RSU, resulting in poor signal-to-noise ratio of the compensation signal
That is to say, the current OBU positioning method has the problem that the positioning error of the OBU in some areas is relatively large, and the overall positioning capability of the RSU is low.

Method used

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  • OBU positioning method, device and system and RSU
  • OBU positioning method, device and system and RSU
  • OBU positioning method, device and system and RSU

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Embodiment Construction

[0031] The technical solutions provided by the embodiments of the present application will be described below with reference to the accompanying drawings.

[0032] In the description of the embodiments of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association of associated objects A relationship means that there may be three kinds of relationships, for example, A and / or B means: A exists alone, A and B exist simultaneously, and B exists alone.

[0033] It should be understood that the terms "first" and "second" in the description of the embodiments of the present application are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. Also...

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Abstract

The embodiment of the invention provides an OBU positioning method and device and an RSU, and relates to the technical field of ETC. The method is applied to an RSU, and comprises the following steps: receiving a positioning signal sent by an OBU; determining the actual phase difference of the positioning signals received by each antenna channel of the RSU; a target calibration parameter is determined from a preset calibration parameter list according to the actual phase difference, the calibration parameter list comprises multiple groups of different calibration parameters, and each group of calibration parameters comprises a calibration angle and a calibration phase difference; and determining the position of the OBU according to the target calibration parameter. According to the technical scheme provided by the embodiment of the invention, the optimal target calibration parameter can be dynamically selected for the positioning signal, and the overall positioning capability of the RSU is improved.

Description

technical field [0001] The present application belongs to the technical field of Electronic Toll Collection (ETC), and specifically relates to an On Board Unit (OBU) OBU positioning method, device, system and Road Side Unit (Road Side Unit, RSU). Background technique [0002] ETC system includes RSU, OBU and central management equipment, mainly used in expressway toll collection. When a vehicle with an OBU installed passes through a toll booth, the RSU first needs to locate the OBU and determine that the OBU is the target interactive device. Subsequently, the RSU obtains the vehicle running information of the OBU, and sends the vehicle running information to the central management device. Finally, the central management device deducts the toll that should be paid this time from the contracted account of the vehicle according to the driving information of the vehicle. [0003] At present, the RSU usually uses a single-beam method for OBU positioning, that is, after the RSU ...

Claims

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Application Information

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IPC IPC(8): G01S5/02
CPCG01S5/021
Inventor 尚雪辉张磊杨帆刘梁梁朱胜超
Owner BEIJING WANJI TECH
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