Vehicle wireless positioning method and system in parking lot

Abstract

The invention discloses a vehicle wireless positioning method and a vehicle wireless positioning method system in a parking lot. The method comprises the following steps: transmitting a positioning request to a landmark reference node arranged in the parking lot through a vehicle node arranged in a vehicle to be positioned, wherein the landmark reference node is arranged between two adjacent parking spaces in the parking lot; after the landmark reference node receives the positioning request transmitted by the vehicle node, transmitting a positioning reply to the vehicle node; and after the vehicle node receives the positioning reply transmitted by a preset quantity of landmark reference nodes, calculating vehicle position information through the vehicle node or other entities according to the preset quantity of positioning replies and in combination with the position information arranged by the preset quantity of landmark reference nodes in the parking lot and realizing vehicle positioning. The vehicle wireless positioning method and the vehicle wireless positioning method system disclosed by the embodiment of the invention have the beneficial effects that the accuracy of the vehicle positioning can be effectively improved, and the lower cost and the lower complexity are realized, so that the requirements that the parking lot is accurately positioned, and the realization is simple are satisfied.

Description

technical field [0001] The invention relates to the technical field of wireless positioning, in particular to a vehicle wireless positioning method and system in a parking lot. Background technique [0002] With the rapid development of the economy, the number of automobiles in my country has increased rapidly in recent years. As a result, traditional small and medium-sized parking lots can no longer meet the actual parking needs, and many large parking lots have emerged. The emergence of large parking lots has effectively alleviated the parking needs of a large number of cars. However, in these large parking lots, people often cannot remember the exact parking position of the vehicle, and then there is a problem of "difficulty in picking up the car". [0003] In order to solve the problem of "difficult to pick up the car", most of the existing indoor parking lots use license plate recognition technology or wireless positioning technology to locate the vehicle. Among them...

AI Technical Summary

Problems solved by technology

[0005] However, there are still two major defects in the RSS-based ranging technology: one is that its measured value fluctuates greatly and is unstable;

However, this method is highly complex and requires high energy consumption. At the same time, it cannot achieve a large improvement in positioning accuracy for scenes such as indoor parking lots with many occluders.

Another method currently used is to conduct a large number of measurements in the entire positioning space before the positioning network is put into use, and establish a measurement value database for the target scene; Large, although it can greatly eliminate the impact of environmental changes and occlusions, it does not improve the fluctuation of the RSS measurement value itself, that is, it still cannot achieve a large improvement in positioning accuracy

[0007] In summary, it can be seen that the existing wireless positioning of various RSS-based ranging technologies is difficult to meet the requirements of accurate positioning and simple implementation of indoor parking lots

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