Пристрої та моделі магнітного трекінгу для систем доповненої реальності
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Date
2021-01-31
Journal Title
Journal ISSN
Volume Title
Publisher
Видавництво Львівської політехніки
Lviv Politechnic Publishing House
Lviv Politechnic Publishing House
Abstract
Розглянуто проблематику побудови сигнальних перетворювачів магнітного трекінгу для
систем доповненої реальності. Інформативні сигнали систем магнітного трекінгу описуються
функціональними залежностями, основні аргументи яких – відстань між актюаторними та
сенсорними котушками та кути їх взаємного нахилу. Для розрахунку просторового положення використовують математичні моделі, які описують розподіл сформованих актюаторними
котушками магнітних полів та сигналів сенсорних котушок. Сигнальний перетворювач
пристроїв магнітного трекінгу розроблено на основі програмованої системи на кристалі PSoC
сім’ї 5LP Family Cypress Semiconductor. Наведено результати експериментальних досліджень
сімей сигналів у разі зміни відстані між котушками та кутів їх взаємного положення.
The problems of developing of magnetic tracking signal transducers for augmented reality systems are considered. The spatial position of objects in such systems is carried out by measuring the vector of reference magnetic fields induction in the low-frequency spectrum of electromagnetic radiation. Small sensors and their 2D or 3D assemblies are mainly sensors and actuators in magnetic tracking sensor systems. Informative signals of magnetic tracking systems are described by functional dependencies, the main arguments of which are the distance between the actuator and sensor coils and the angles of their mutual inclination. To calculate the spatial position, signal models are used, which describe the distribution of magnetic fields generated by actuator coils and signals ofsensor coils. The structure of the signal-processing chain of the programmable magnetic tracking system and its implementation based on PSoC family 5LP Family Cypress Semiconductor Corporation are presented. The results of experimental studies of a signals family when changing the distance between the coils and the angles of their relative position are obtained. Taking into account experimental data the signal model describing functional dependences of informative signals is developed. The use of the presented signal model covers the tasks of development and specification of algorithms for calculating the spatial position, debugging and rapid assessment of the accuracy of the magnetic tracking system, optimization of calibration procedures and more. Approbation of the presented devices of magnetic tracking is carried out in numerous projects on development of augmented reality components in data fusion technology with a combination of signals of measuring converters of magnetic tracking and IMU modules based on MEMS 3D accelerometers and gyroscopes.
The problems of developing of magnetic tracking signal transducers for augmented reality systems are considered. The spatial position of objects in such systems is carried out by measuring the vector of reference magnetic fields induction in the low-frequency spectrum of electromagnetic radiation. Small sensors and their 2D or 3D assemblies are mainly sensors and actuators in magnetic tracking sensor systems. Informative signals of magnetic tracking systems are described by functional dependencies, the main arguments of which are the distance between the actuator and sensor coils and the angles of their mutual inclination. To calculate the spatial position, signal models are used, which describe the distribution of magnetic fields generated by actuator coils and signals ofsensor coils. The structure of the signal-processing chain of the programmable magnetic tracking system and its implementation based on PSoC family 5LP Family Cypress Semiconductor Corporation are presented. The results of experimental studies of a signals family when changing the distance between the coils and the angles of their relative position are obtained. Taking into account experimental data the signal model describing functional dependences of informative signals is developed. The use of the presented signal model covers the tasks of development and specification of algorithms for calculating the spatial position, debugging and rapid assessment of the accuracy of the magnetic tracking system, optimization of calibration procedures and more. Approbation of the presented devices of magnetic tracking is carried out in numerous projects on development of augmented reality components in data fusion technology with a combination of signals of measuring converters of magnetic tracking and IMU modules based on MEMS 3D accelerometers and gyroscopes.
Description
Keywords
магнітний трекінг, вбудована система, сенсор доповненої реальності, magnetic tracking, embedded system, augmented reality sensor
Citation
Голяка Р. Пристрої та моделі магнітного трекінгу для систем доповненої реальності / Р. Голяка, Т. Марусенкова, М. Хільчук // Інфокомунікаційні технології та електронна інженерія. — Львів : Видавництво Львівської політехніки, 2021. — Vol 1. — № 2. — С. 81–93.