GPS Receiver Power Saving via Dynamic Signal Reception Intervals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Portable positioning apparatuses with built-in batteries face power consumption issues when unable to receive GPS signals, as existing power-saving techniques do not effectively account for varying reception states.
Innovation Solution
A positioning apparatus with a position computing part, reception status determining part, and intermittent drive setting part that adjusts signal reception intervals based on the number of available GPS satellites, switching to longer intervals when signals are weak or unavailable to conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the positioning apparatus continues to determine positions at regular intervals, then position update frequency is maintained, but electric power is wasted when radio wave reception is impossible
Solution Approach 1:
The positioning apparatus dynamically adjusts the position determination interval based on reception status. When radio wave reception is successful, the apparatus determines positions at shorter intervals (e.g., 1 second). When reception fails or the number of detectable satellites is insufficient, the apparatus automatically extends the determination interval to longer periods (e.g., 5 seconds or more), thereby adapting the operation to current signal conditions and reducing unnecessary power consumption.
Solution Approach 2:
The system changes the time interval parameter for position determination based on reception conditions. By monitoring whether radio waves are successfully received and counting the number of detectable satellites, the system modifies the determination cycle parameter dynamically, switching between different interval values to balance position update frequency and power consumption according to actual signal availability.
2Use of energy by moving object
If the positioning apparatus uses intermittent drive to save power, then power consumption is reduced, but position determination accuracy deteriorates when reception state is not considered
Solution Approach 1:
The positioning apparatus incorporates feedback mechanisms by continuously monitoring reception status, including whether radio waves are successfully received and the number of satellites detected. Based on this feedback information, the system intelligently adjusts the position determination interval, ensuring that power-saving intermittent operation does not compromise accuracy when signals are available, while extending intervals only when reception conditions warrant it.
Solution Approach 2:
The system dynamically adapts the intermittent drive strategy based on real-time reception conditions. Rather than using fixed intermittent intervals, the apparatus adjusts determination frequency according to satellite detection results, maintaining higher accuracy when multiple satellites are detected while reducing power consumption when reception is poor or impossible.
3Measurement precision
If the positioning apparatus determines positions at short intervals, then position accuracy is maintained, but power consumption increases in areas with no GPS signals
Solution Approach 1:
The system changes the position determination interval parameter based on reception status. When radio wave reception is successful and sufficient satellites are detected, the apparatus uses shorter determination intervals to maintain position accuracy. When reception fails or satellite count is insufficient, the apparatus automatically extends the determination interval to longer periods, thereby reducing power consumption in areas with poor or no GPS signal coverage.
Data Source
AI summary
A positioning apparatus includes: a position computing part configured to receive signals from a plurality of radio transmitters to compute a position of the positioning apparatus; a reception status determining part configured to determine a reception state of the signals from the plurality of the radio transmitters; and an intermittent drive setting part configured to set a time interval for receiving signals by the position computing part according to the reception state determined by the reception status determining part.