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Vehicle search method for indoor parking lot based on triangular area positioning

A triangular area and parking lot technology, applied in positioning, road vehicle traffic control system, measuring device, etc., can solve problems such as large error, fast signal loss, and increased calculation amount

Active Publication Date: 2016-09-21
西安蒙顿信息科技有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] However, there are two shortcomings in the LANDMARC positioning algorithm when solving the "nearest neighbor": (1) All reference labels participate in the calculation as the candidate labels of the "nearest neighbor", which brings a substantial increase in the amount of calculation; (2) the existing path loss formula Caused by "the farther the tag is from the reader, the faster the signal loss and the greater the error"

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  • Vehicle search method for indoor parking lot based on triangular area positioning
  • Vehicle search method for indoor parking lot based on triangular area positioning
  • Vehicle search method for indoor parking lot based on triangular area positioning

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0030] Assuming that the indoor parking lot is a LANDMARC architecture system, there are M readers (Readers) evenly arranged in the system (generally M≥3), N reference tags (rf_Tag), and L tags to be located (Tag). The energy level of the reader is divided into 1-8 levels; the position coordinates of the reference tag are known, which are used to assist positioning to improve the positioning accuracy of the target tag, that is, the tag to be located (Tag). At this moment, the description of the method proposed by the present invention is as follows:

[0031] (1) Define each tag (including Tag and rf_Tag) as an 8-bit binary string, and initialize each bit as "0".

[0032] (2) Every 30s, all readers (Readers) perform a circular scan from 1 to 8 energy levels at the same time...

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Abstract

The invention provides a method for looking for a car in an indoor parking area based on triangular area location. A location system with an LANDMARC structure is structured. A scan-round is carried out by all readers. When a label to be positioned is detected by three readers, binary string matrixes and conditions of reference label reading are written down and then a nearest neighbor is chosen, the position coordinates of the label to be positioned is calculated by utilizing the coordinates of the nearest neighbor, and the positions of all the labels to be positioned are double calculated. The method for looking for the car in the indoor parking area based on triangular area location enables the hardware cost of structuring the location system to be reduced. The location system adapts to indoor environmental dynamic uncertainty caused by wall or object sheltering, reader efficacy losing and other changes. When the number of readers is large, calculated amount is reduced effectively and the precision of location is improved.

Description

technical field [0001] The invention belongs to the electronic technical field of intelligent traffic systems, and relates to an RFID-based real-time intelligent area positioning method. Background technique [0002] At present, more than 20 of the 33 customer services of the Intelligent Transport System (ITS, Intelligent Transport System) architecture involve real-time positioning of vehicles. Therefore, the study of accurate and efficient vehicle real-time positioning technology has become a hot spot in the field of intelligent transportation recently. In the intelligent parking management system, it is a specific application of this research to solve the problem that the car owner is difficult to find the car when he leaves. [0003] The core of realizing fast car finding in indoor parking lot is efficient and accurate positioning algorithm. At present, common indoor positioning is mainly realized by using technologies such as infrared, wireless local area network, ultr...

Claims

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Application Information

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IPC IPC(8): G08G1/123G01S5/14
CPCG01S5/02G08G1/123
Inventor 郭阳明何佩吴昊张佳琦刘云超郑亚飞
Owner 西安蒙顿信息科技有限公司
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