Augmented Reality Sports Gait Analysis With Lidar Foot Tracking
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Solution Overview
Problem
Existing gait analysis methods are costly, require attachable sensors, and controlled laboratory environments, making it difficult to assess gait patterns in daily life, particularly for identifying and correcting incorrect walking habits in children and teenagers.
Innovation Solution
A gait analysis method using an augmented reality interactive sports device that projects a gait path on the floor, tracks user motion with a Lidar sensor, measures foot position information, and analyzes gait straightness and cadence without attachable sensors or controlled environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If attachable sensors and controlled laboratory environments are used for gait analysis, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces attachable mechanical sensors with a camera-based vision system. The camera captures images of the gait path, and image processing algorithms extract gait parameters without requiring physical sensors on the user's body. This substitution eliminates sensor attachment complexity while maintaining measurement capability through optical detection and computational analysis.
Solution Approach 2:
The patent introduces an intermediary image processing system that bridges the camera and gait analysis. Instead of directly measuring gait parameters, the system captures visual information and uses algorithms to extract gait path, step length, and other parameters. This intermediary processing layer enables precise measurements without complex hardware attachment.
2Measurement precision
If attachable sensors are used for gait analysis, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent replaces the requirement for sensor attachment with a simple camera-based system. Users无需 attach any devices to their bodies; instead, the camera captures gait information from a distance. This eliminates the operational complexity of sensor attachment and makes the system much easier to use while maintaining measurement precision through image processing.
3Measurement precision
If various sensors, controlled laboratory environment, and equipment are used for gait analysis, then measurement precision is improved, but cost increases
Solution Approach 1:
The patent replaces expensive sensors and laboratory equipment with a standard camera system. The camera, being a common and relatively inexpensive device, captures the necessary gait information. This substitution dramatically reduces the cost barrier while maintaining analytical capability through software processing rather than expensive hardware.
Solution Approach 2:
The patent substitutes mechanical sensors and controlled laboratory environments with an optical detection system. The camera-based vision system eliminates the need for expensive sensor hardware and controlled environments, achieving cost-effectiveness while maintaining measurement precision through image processing algorithms.
4Measurement precision
If attachable sensors are used for gait analysis, then measurement precision is improved, but adaptability to daily life deteriorates
Solution Approach 1:
The patent replaces attachable sensors with a camera-based system that can operate in various daily life settings. The camera can be positioned in different locations and captures gait information naturally during everyday activities, making the system adaptable to real-world conditions without requiring controlled laboratory environments or sensor attachment.
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
Enables simple, cost-effective gait analysis to identify and correct walking habits by providing gait stability indices, facilitating rehabilitation and exercise training through augmented reality sports devices.
Implementation Method 1
measuring foot position information of the user who moves along the gait path using the Lidar sensor unit which laser-scans the plane at a predetermined height from the floor
Data Source
AI summary
The present disclosure relates to a gait analysis method using an augmented reality interactive sports device and to be more specific, a gait analysis method which is implemented by an augmented reality interactive sports device which projects an image on a floor and tracks a user' motion using a Lidar sensor unit to control an interaction between contents and a user including (1) displaying a gait path on the floor by means of the augmented reality interactive sports device; (2) measuring foot position information of the user who moves along the gait path using the Lidar sensor unit which laser-scans the plane at a predetermined height from the floor; and (3) analyzing a gait straightness and a gait cadence from the user's foot position information measured in the step (2) and a measurement time.Further, the present disclosure relates to a gait analysis apparatus using an augmented reality interactive sports device and to be more specific, a gait analysis apparatus includes a gait path generating unit which transmits and receives data with the augmented reality interactive sports device which projects an image on a floor and tracks a user' motion using a Lidar sensor unit to control interaction between contents and the user, and displays a gait path on the floor by means of the augmented reality interactive sports device, a gait measuring unit which measures foot position information of the user who moves along the gait path using the Lidar sensor unit which laser-scans the plane at a predetermined height from the floor; and an gait analysis unit which analyzes a gait straightness and a gait cadence from the user's foot position information measured in the gait measuring unit and a measurement time.According to the gait analysis method and apparatus using an augmented reality interactive sports device proposed by the present disclosure, a gait path is displayed on a floor using an augmented reality interactive sports device, foot position information of a user who moves along the gait path is measured to analyze and provide gait straightness and gait rhythm to perform the gait analysis simply and easily and at a lower cost by utilizing an augmented reality interactive sports device used for various sports, without using an attachable sensor or a controlled laboratory environment to help identify incorrect waling habits and develop correct walking habits.