Hand Width Adaptive Sensor Assignment for Wearable Controllers
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Solution Overview
Problem
The challenge is accurately detecting the state of a user's fingers using a controller device, which is difficult due to variations in hand size among users, leading to inconsistent sensor assignments and potential errors in finger movement recognition.
Innovation Solution
A control apparatus with multiple sensors on the controller device that includes a width identification unit to determine the hand's width and assign sensors to each finger, along with a state identification unit to accurately detect bending and stretching, and a mount sensor to ensure proper device placement, preventing erroneous detection and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed sensor assignment is used for all users, then the device structure is simple, but finger state detection accuracy deteriorates due to hand size variations
Solution Approach 1:
The sensor assignment is made dynamic by automatically determining the correspondence between sensors and fingers based on the actual hand width detected during calibration, rather than using a fixed assignment. This allows the system to adapt to different hand sizes while maintaining accurate finger state detection.
Solution Approach 2:
The system changes the parameter of sensor assignment based on the hand width parameter. By detecting the actual hand width and using it to determine sensor-finger correspondence, the system adjusts the assignment parameters to match the user's anatomy, resolving the contradiction between simple structure and accurate detection.
2Measurement precision
If sensors operate continuously to detect finger states, then detection accuracy is maintained, but power consumption increases
Solution Approach 1:
Instead of continuous operation, the sensor operates periodically - continuously during calibration to detect hand width and establish sensor assignment, then intermittently during actual use to detect finger states only when needed. This periodic operation maintains detection accuracy while reducing overall power consumption.
Solution Approach 2:
The system performs self-calibration by automatically detecting hand width and determining sensor-finger correspondence without requiring continuous sensor operation or external intervention. This self-service calibration enables accurate detection while minimizing power consumption during normal operation.
3Ease of manufacture
If the controller device is designed for a standard hand size, then manufacturing is simplified, but detection accuracy deteriorates for users with different hand sizes
Solution Approach 1:
The system performs preliminary calibration action before actual use by detecting the user's hand width and establishing the appropriate sensor-finger correspondence. This preliminary action allows the device to be manufactured with standard dimensions while still achieving accurate detection for individual users through pre-use adaptation.
Data Source
AI summary
A control apparatus controls the controller device that is mounted on a hand of a user and includes a plurality of sensors exceeding the number of fingers of the user to be detected so as to detect bending and stretching of the fingers to be detected. The control apparatus identifies a width of the hand of the user, determines, on the basis of information regarding the identified width of the hand, to which sensor among the plurality of sensors each of the fingers to be detected is assigned, and uses an output of the sensor assigned to each of the fingers to be detected to identify and output a state of bending and stretching of the corresponding finger.