Indoor and underground space positioning method based on infrared reference point

Abstract

The invention discloses an indoor and underground space positioning method based on an infrared reference point, and belongs to the technical field of navigation positioning. The method comprises the following steps: designing infrared node equipment; arranging a plurality of installation points in the top area of the indoor or underground space, and installing infrared node equipment; the receiver obtaining the space coordinates of all the infrared node devices in a communication or local data mode; and the receiver sensing the infrared node through the infrared camera and calculates and obtaining the positioning information of the receiver. The method is simple and easy to implement, and has important significance in guaranteeing continuous positioning of the high-capacity receiver in application scenes such as indoor and underground.

Description

technical field [0001] The invention belongs to the technical field of navigation and positioning, in particular to an indoor and underground space positioning method based on infrared reference points. Background technique [0002] Human activities are extending from outdoor to indoor, underground and other spaces. In these scenes, due to the occlusion of building structures or the ground surface, satellite navigation signals are impenetrable or weak, and traditional satellite navigation technology is not available. How to use indoor / underground Obtaining continuous and accurate positioning information in space has become a technical problem. [0003] For the positioning of indoor and underground scenes, a large number of technical researches have been carried out at home and abroad, including the use of pseudolite base stations, UWB base stations, 5G communication base stations and acoustic wave base station positioning technologies, and the use of specific radio signal wa...

AI Technical Summary

Problems solved by technology

However, there are two shortcomings in the application of the above-mentioned technology: one is due to the attenuation of non-line-of-sight propagation signals such as diffraction and diffraction compared with direct projection signals during the propagation of radio signals and acoustic signals in indoor and underground spaces with many shelters It is not large, which makes it difficult for the receiver to identify and distinguish non-line-of-sight signals, especially in an environment where there are a large number of moving people and objects. way to accurately identify

Second, for the technology of using two-way or multi-way wireless ranging to obtain the geometric distance between the base station and the receiver, since it is necessary to distinguish the return signals of different receivers and avoid the near-far effect between receivers, there must be receiver capacity and Contradictions between positioning frequencies

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