Cycling Garment Turn Indication via Accelerometer Gesture Detection
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Solution Overview
Problem
Existing cycling garments fail to clearly indicate a rider's intended maneuvers, especially in low light conditions, as arm movements are not always visibly discernible.
Innovation Solution
A garment equipped with accelerometers on each sleeve and a controller that illuminates corresponding indicator lights based on independent arm movements, filtering out common movements and determining arm gestures by analyzing acceleration, velocity, and displacement data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If arm movements are used to indicate maneuvers, then the indication method is simple and natural, but the visibility of the indication is insufficient especially in low light conditions
Solution Approach 1:
The patent combines the natural arm movement indication method with electronic indicator lights integrated into the cycling garment. The accelerometers detect arm movements and trigger corresponding LED lights on the garment, merging the simplicity of gesture-based indication with the high visibility of electronic lighting to resolve the contradiction between ease of operation and illumination intensity.
2Illumination intensity
If indicator lights are added to the garment, then the visibility of maneuvers is improved, but the device complexity increases
Solution Approach 1:
The cycling garment integrates multiple functions into a single system: the accelerometers serve both as motion detection devices for maneuver indication and as part of the overall garment structure. The controller unit centralizes the processing logic for detecting arm movements and triggering lights, reducing overall system complexity despite adding multiple indicator lights across the garment.
Solution Approach 2:
The garment is divided into multiple segments with indicator lights distributed across different locations (sleeves, back, sides). This segmentation allows the visibility function to be enhanced through multiple distributed light sources while enabling modular design that manages system complexity by distributing components across separate garment sections.
3Measurement precision
If accelerometers are used to detect arm movements, then the accuracy of maneuver detection is improved, but the difficulty of detecting and measuring independent arm movements increases
Solution Approach 1:
The patent uses asymmetric placement of accelerometers on opposite sides of the garment and compares their signals differently based on direction. When one arm moves independently, the accelerometer on that side detects movement while the other remains relatively stationary, creating an asymmetric signal pattern that the controller identifies as a maneuver indication, thereby improving detection accuracy while managing the complexity of distinguishing independent movements.
Solution Approach 2:
The controller continuously monitors accelerometer data and provides feedback by comparing current readings with previous states to determine when independent arm movement has occurred. This feedback mechanism allows the system to accurately detect maneuver intentions by analyzing changes in acceleration patterns and distinguishing them from normal cycling movements, thereby improving measurement precision while systematically addressing the detection difficulty.
Data Source
AI summary
A garment for cycling, having indicating lights associated with sleeves of the garment; first and second accelerometers provided on respective sleeves; and a controller configured to receive data from the accelerometers and determine from the date whether a wearer of the garment has raised an arm to indicate a maneuver. The controller is further configured to illuminate the appropriate indicating light depending on which arm has been raised, and to compare the data from the first and second accelerometers to filter out movements common to both the first and second accelerometers and determine when the sleeves are being moved independently of one another in a manner to indicate a turn.