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

Abstract

The invention discloses a fusion indoor positioning method, system and device based on a wearable device. Miller coding is used to make each LED-ID optical signal contain a timing component, thereby solving the problem of interference caused by asynchronous transmission of information by multiple LED lamps. The problem of correct decoding, while holding the LED light source to broadcast LED-ID information asynchronously, under the continuous window over-sampling mechanism, the Goertzel algorithm can realize single-sampling decoding of multiple LED-IDs, thereby supporting real-time positioning of users during movement; Moreover, the inertial navigation positioning algorithm based on dual LED modified RSS algorithm and acceleration sensor can solve the problem of sharp decline in positioning performance when the LED signal is blocked. Therefore, the present invention effectively solves the problem of indoor positioning of wearable devices, can realize real-time precise positioning of moving users, is suitable for indoor scenes such as exhibition halls, museums, shopping centers, and supermarkets, and has strong usability and great 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.

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