An underground positioning device and positioning method based on passive optical tags

Abstract

An underground positioning device and positioning method based on passive optical tags, including a combined optical tag capable of light intensity modulation and retroreflection of light, an optical transmitter and a receiver, and the combined optical tag is evenly laid longitudinally on the The roof of the roadway; the light transmitter and the receiver are respectively installed on the top of the mining car, and the light transmitter and the receiver are facing the top of the roadway, and the edge computing nodes are installed inside the mine car to obtain the reflected light intensity information in real time and according to the light intensity. The strong information analyzes which combined optical tag the corresponding optical signal is located in, so as to locate the position of the mining vehicle. The combined optical label of the present invention can realize the modulation function without power supply and chip, and can realize the modulation of light intensity and the back reflection of light; The tag recognition method with strong fluctuations has good application prospects and can be deployed on a large scale underground, and is suitable for long, narrow and dark underground environments.

Description

Technical field [0001] The present invention relates to an underground positioning device and positioning method, specifically an underground positioning device and positioning method based on a passive light tag, which belongs to the field of downhole intelligent positioning technology. Background [0002] Coal resources as one of the energy and mineral resources, related to China's social construction and people's livelihood construction, in order to promote the safe production of underground, it is urgent to establish a robust underground communication system to achieve the positioning of personnel or mine vehicles. [0003] At present, a variety of downhole communication technologies have been proposed, such as WIFI, Bluetooth and radio frequency identification, etc., however, due to the complex electromagnetic environment and multipath interference in the underground, the above communication technologies usually have low positioning accuracy, high cost, and difficulty in act...

AI Technical Summary

Problems solved by technology

However, most positioning methods based on visible light require customized beacon circuits to retrofit the light source, which involves complex retrofitting techniques and huge retrofitting costs, making it difficult to be widely adopted in the short term

In addition, unlike methods that require complex custom light sources, tag-based visible light positioning technology uses tags to modulate light to achieve positioning, but such methods usually require optical tags to be equipped with power sources or chips to provide modulation functions, and rely on additional equipment (such as cameras or special sensors) for optical tag recognition, high cost and energy consumption hinder its large-scale development

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