External Device Calibration for User-Mounted Wearables
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Solution Overview
Problem
Wearable computing devices, such as head-mounted devices, face challenges in calibration due to their outward-facing sensors that cannot gather sufficient data about the user or the device's position, requiring frequent recalibration as they move and change orientation.
Innovation Solution
A system and method where an external device provides calibration data to a user-mounted device, including sensor data normalized to account for the device's location, orientation, and motion, allowing for accurate calibration of the device's pose and alignment relative to the user, which can be achieved through joint calibration between two user-mounted devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If user-mounted devices use outward-facing sensors to gather environmental data, then the device can capture information about the user's surroundings, but the device cannot gather sufficient data about the user or its own position for proper calibration
Solution Approach 1:
The patent introduces an external device as an intermediary to provide calibration data to the user-mounted device. This external device contains sensors that can detect the user's position, orientation, and motion, thereby resolving the information loss problem without requiring the user-mounted device to have complex inward-facing sensors.
2Adaptability or versatility
If user-mounted devices are worn by users who move frequently, then the device can be used in diverse environments and positions, but the device requires frequent recalibration due to changes in position and orientation
Solution Approach 1:
The patent implements a feedback mechanism where the external device continuously monitors the user's position, orientation, and motion, and provides real-time calibration data to the user-mounted device. This feedback loop allows the device to automatically adjust and maintain accurate calibration despite frequent movement, thereby maintaining reliability while preserving mobility.
3Measurement precision
If the device enters calibration mode to receive calibration data, then the device can be accurately calibrated, but the calibration process requires external devices and may interrupt device operation
Solution Approach 1:
The patent performs preliminary calibration actions by having the external device pre-acquire and normalize sensor data before transferring it to the user-mounted device. This preliminary preparation allows the user-mounted device to receive ready-to-use calibration data without requiring time-consuming real-time calibration procedures, thereby reducing operational interruption time while maintaining high precision.
Data Source
AI summary
Systems, methods, and computer media for calibrating user-mounted devices are provided. An external device capable of providing calibration data to a user-mounted device worn by a user is identified. An identification acknowledgement is received from the external device. A device calibration mode is entered in which calibration data describing the user-mounted device is received by the user-mounted device. The calibration data is based at least in part on sensor data acquired and normalized by the external device. The calibration data is then received. The calibration data includes at least one determined pose or body measurement of the user and a calculated alignment of the user-mounted device relative to the user. The user-mounted device is calibrated using the received calibration data.