Indoor Pose Detection via Polarized Light and Illumination Analysis

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Solution Overview

Problem

Existing location-based services struggle to accurately determine the pose (viewing direction) of a movable body in indoor environments due to signal interference from indoor structures, unlike outdoor systems which are not suitable for indoor localization.

Innovation Solution

A pose detection device utilizing a first and second polarization unit with transmission axis differences, along with illuminometers, generates pose information by analyzing light variation curves and illumination values from a polarized light source, enabling accurate determination of the movable body's viewing direction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If outdoor localization systems (GPS, mobile communication networks) are used for indoor localization, then location estimation can be achieved in outdoor environments, but signal interference from indoor structures (walls, etc.) causes inaccurate location determination indoors

Engineering Contradiction:

Improvelocation estimation accuracyVSAvoidsignal interference from indoor structures

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the harmful signal interference from the indoor environment by using polarized light sources and polarization units that are not affected by electromagnetic signal interference from walls and indoor structures. The system uses optical signals instead of electromagnetic radio waves, effectively removing the interference problem inherent in GPS and mobile communication-based localization systems when used indoors.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the electromagnetic field-based localization system (GPS, mobile networks) with an optical system using polarized light. By substituting the detection mechanism from electromagnetic wave reception to optical polarization detection, the system achieves accurate indoor localization without suffering from signal interference by building structures.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Loss of information

If location detection technology determines only the user's position in indoor space, then location information can be obtained, but the viewing direction (pose) of the user cannot be determined

Engineering Contradiction:

Improveviewing direction informationVSAvoidpose detection capability

Core Design Contradiction:

Loss of informationVSMeasurement precision

Solution Approach 1:

The patent adds a new dimension to location detection by incorporating polarization angle measurement. While traditional systems only detect position (x, y coordinates), this system simultaneously measures the polarization angle of transmitted light, enabling determination of the user's viewing direction and pose in addition to location.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent introduces polarized light as an intermediary carrier that conveys both location and orientation information. By using polarized light transmission and detection, the system can extract both positional data and viewing direction data from the same light signal, enabling comprehensive pose detection.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system effectively detects the pose of a movable body and provides location-based services by determining the viewing direction, enhancing indoor localization accuracy and providing relevant supplemental information.

Implementation Method 1

a first polarization unit and a second polarization unit positioned to have transmission axis difference values different from each other, wherein the first polarization unit and the second polarization unit receiving light emitted from a polarized light source

Methodology Applied

Scientific EffectPolarization: Polarisation

Implementation Method 2

a first illuminometer measures positioned below the first polarization unit and a second illuminometer positioned below the second polarization unit

Methodology Applied

Scientific EffectPhotoelectric Effect: Photoelectric Effect

Data Source

PatentUS10215839B2Pose detection device of movable body and location-based supplemental service providing system

Publication Date: 2019.02.26 SOCAR INC

AI summary

Embodiments herein disclose a pose detection device for a movable body and a location-based supplemental service providing system. The pose detection device includes a first polarization unit and a second polarization unit positioned to have transmission axis difference values different from each other, wherein the first polarization unit and the second polarization unit receiving light emitted from a polarized light source located beyond and apart from the first polarization unit and the second polarization unit. Further, the pose detection device includes a first illuminometer measures positioned below the first polarization unit and a second illuminometer positioned below the second polarization unit. Further, the pose detection device includes a an interpretation unit generating pose information of the movable body based on detected light variation curves for the first polarization unit and the second polarization unit and illumination values measured by the first illuminometer and the second illuminometer.