Fusion indoor positioning method, system and device based on wearable device

Abstract

The invention discloses a fusion indoor positioning method, system and device based on a wearable device, wherein Miller codes are adopted to enable LED-ID optical signals of each path to contain a timing component, so that the problem that asynchronous sending information of a plurality of LED lamps is interfered and correct decoding cannot be achieved can be solved, LED light sources are supported to asynchronously broadcast LED-ID information, single sampling decoding of multiple paths of LED-ID can be achieved through a Goertzel algorithm under a continuous window oversampling mechanism, and real-time positioning of a user in the moving process is supported. Moreover, the problem of rapid reduction of positioning performance caused when LED signals are shielded can be solved by matching the double-LED modified RSS algorithm with an inertial navigation positioning algorithm of an acceleration sensor. Therefore, according to the invention, the indoor positioning problem of the wearable device is effectively solved, real-time accurate positioning of the user in movement can be achieved, and the fusion indoor positioning device is suitable for indoor scenes such as exhibition halls, museums, shopping centers and supermarkets, and is high in usability and practical value.

Description

technical field [0001] The invention relates to the technical field of visible light positioning, in particular to a fusion indoor positioning method, system and device based on wearable devices. Background technique [0002] Indoor positioning technology based on visible light communication (Visible Light Communication, VLC), also known as visible light positioning (Visible Light Positioning, VLP) technology. This technology has become a research and application hotspot in the field of indoor positioning due to its remarkable advantages such as positioning accuracy up to centimeter level, environmental protection, not being affected by electromagnetic interference of existing wireless systems, and taking into account lighting and positioning at the same time. [0003] VLP systems generally consist of multiple LEDs. In a common solution, the transmitter modulates adjacent LEDs to emit sine waves or square waves of different frequencies through hardware circuits. The receiv...

AI Technical Summary

Problems solved by technology

[0004] At present, the positioning scenarios set in most VLP technologies are to make the VLP receiver be at a certain height, in a static state, and without any occlusion around it. The proposed methods and algorithms are only applicable to this scenario and environment. It can work normally in this scene environment, but it cannot be applied to the positioning environment when the wearable device is worn on the pedestrian and the pedestrian is moving.

Images