Motion-Capture System Power Management via Motion Detection
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Solution Overview
Problem
Motion-capture systems face practical limitations due to high power consumption, making them impractical for extended use, and existing systems often compromise on performance to reduce energy usage.
Innovation Solution
Implementing a power-saving mechanism where cameras and image-processing hardware operate in low-power mode until an object is detected, switching to high-power mode only when motion is present, using light sensors to trigger the wake-up and adjusting frame rates based on motion speed or user input to conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motion-capture systems operate continuously at high frame rate, then motion-tracking performance is maintained, but power consumption becomes excessive
Solution Approach 1:
The system dynamically adjusts its operating mode between low-power standby and high-performance capture modes based on real-time motion detection. The camera switches between these states flexibly, capturing motion events at high frame rate while maintaining低功耗 during static periods, thus resolving the contradiction between continuous performance and energy consumption
Solution Approach 2:
The system employs periodic monitoring at low power to detect motion events, then transitions to continuous high-rate capture only when motion is detected. This periodic activation pattern allows the system to maintain measurement precision during active use while minimizing power consumption during idle periods
2Use of energy by moving object
If the system operates in low-power mode continuously, then power consumption is reduced, but motion detection capability is compromised
Solution Approach 1:
The system segments the operational timeline into distinct low-power monitoring phases and high-power capture phases. During low-power phases, the system performs basic motion detection using reduced-rate imaging or sensor input. When motion is confirmed, it transitions to high-power continuous capture, thus maintaining detection capability while minimizing overall energy consumption
Solution Approach 2:
The system performs preliminary motion detection at low power before initiating full capture sequence. This preliminary check using reduced-rate imaging or environmental sensors triggers full high-rate capture only when necessary, preventing unnecessary high-power operation while ensuring motion events are not missed
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
Significantly reduces power consumption while maintaining high-quality motion capture and tracking performance, ensuring efficient operation only when the system is actively used for motion capture.
Implementation Method 1
the system includes additional light sensors, e.g., located near the camera(s), that monitor the environment for a change in brightness indicative of the presence of an object
Data Source
AI summary
The technology disclosed relates to reducing the overall power consumption of motion-capture system without compromising the quality of motion capture and tracking In general, this is accomplished by operating the motion-detecting cameras and associated image-processing hardware in a low-power mode unless and until a moving object is detected. Once an object of interest has been detected in the field of view of the cameras, the motion-capture system is “woken up,” i.e., switched into a high-power mode, in which it acquires and processes images at a frame rate sufficient for accurate motion tracking.