Portable Device Orientation Detection Algorithm
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Solution Overview
Problem
The increasing power consumption in portable devices due to high sample rates of querying accelerometer data for orientation detection, which wastes processor resources and reduces battery life.
Innovation Solution
An orientation detection algorithm that determines when a portable device is in a flat and stable status, allowing the processor to stop querying accelerometer data until an enable signal is received, thereby reducing power consumption by using different query rates based on device status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the processor continuously queries the accelerometer at a high sample rate to detect orientation changes, then the orientation detection precision is improved, but the power consumption increases and battery life decreases
Solution Approach 1:
The processor queries the accelerometer at different sample rates based on device status. When the device is in a flat and stable status, the query rate is reduced or stopped. When the device transitions out of this status, the query rate increases to detect orientation changes. This periodic adjustment of query frequency resolves the contradiction by maintaining precision when needed while reducing power consumption during stable periods.
Solution Approach 2:
The system dynamically adjusts the accelerometer query sample rate based on real-time device status detection. The processor monitors whether the device is in a flat and stable status and adaptively changes the querying behavior accordingly. This dynamic adjustment allows the system to optimize between measurement precision and power consumption based on current operational conditions.
2Speed
If the processor continuously queries the accelerometer at a high sample rate, then the orientation detection responsiveness is improved, but the processor resource utilization increases
Solution Approach 1:
The processor implements periodic querying with variable intervals based on device status. During flat and stable status, querying is reduced or paused. When status changes occur, querying frequency increases to ensure responsive detection. This resolves the contradiction by maintaining responsiveness when necessary while reducing processor utilization during stable periods.
Solution Approach 2:
The system dynamically adjusts the querying strategy based on detected device status. The processor monitors stability conditions and adaptively modifies query frequency, transitioning between low-activity and high-activity states as needed. This dynamic approach optimizes the balance between detection responsiveness and processor resource consumption.
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
This approach reduces power consumption by optimizing the querying of accelerometer data, extending battery life and conserving processor resources in portable devices.
Implementation Method 1
a portable device with an orientation detection mechanism... comprising an accelerometer and a processor. The processor queries the accelerometer to acquire an accelerometer data
Data Source
AI summary
An embodiment of the invention provides an orientation detection method for a portable device. The method comprises acquiring an accelerometer data, determining whether the portable device is in a flat status, determining whether the portable device is in a stable status, and when the portable device is determined in both the flat status and the stable status, stopping acquiring the accelerometer data until receiving an enable signal.