Satellite Signal Reception Scheduling for Wearable Time Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Satellite signal receiving devices, such as GPS-enabled wristwatches, face challenges in reliably executing satellite signal reception processes due to environmental factors like indoor usage, weather conditions, and solar panel coverage, leading to inefficient power consumption and time accuracy issues.
Innovation Solution
Implementing a scheduled reception control unit that sets a daily reception time based on past successful reception times, combining illuminance detection, time-based, and manual reception processes to increase the likelihood of successful satellite signal acquisition, while adapting the reception time if consecutive failures occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If satellite signal reception is executed continuously or frequently, then time accuracy is improved, but power consumption increases
Solution Approach 1:
The reception execution determination unit determines whether to execute satellite signal reception based on periodic patterns in user behavior (e.g., typical outdoor activity times). The system schedules reception attempts at specific periods when the wearable device is likely to be outdoors, rather than continuously or on fixed time intervals, thereby balancing time accuracy maintenance with power conservation.
Solution Approach 2:
The system uses feedback from illuminance sensor data and reception history to dynamically adjust reception execution decisions. When recent reception results indicate good signal availability or when illuminance patterns suggest the user is outdoors, the system is more likely to execute reception. This feedback mechanism optimizes the balance between maintaining accurate time and conserving battery power.
2Use of energy by moving object
If satellite signal reception is executed based on solar panel power output, then power consumption is reduced, but reception reliability deteriorates
Solution Approach 1:
The system uses illuminance sensor data for multiple purposes: not only to determine whether to execute reception (replacing solar panel power output assessment) but also to infer user behavior patterns and outdoor activity timing. This multi-functional use of illuminance data improves reception reliability by providing more consistent environmental context compared to solar panel power output, which varies with panel coverage and charging state.
Solution Approach 2:
The system changes the parameter used for reception decision-making from solar panel power output to illuminance level. This parameter change is critical because illuminance directly correlates with outdoor lighting conditions and user activity patterns, providing a more reliable indicator for determining optimal reception timing without being affected by solar panel coverage or charging status.
3Use of energy by moving object
If reception process is skipped in low power conditions, then power consumption is reduced, but time accuracy deteriorates
Solution Approach 1:
The system performs preliminary assessment of reception necessity by analyzing illuminance patterns and user behavior before executing reception. By predicting optimal reception opportunities in advance based on historical data and current environmental conditions, the system ensures that reception is executed at the most appropriate moments, maintaining time accuracy while minimizing unnecessary power consumption.
Solution Approach 2:
The reception execution determination dynamically adjusts reception decisions based on real-time illuminance data, reception history, and inferred user behavior. This dynamic approach allows the system to adapt to changing conditions, increasing reception likelihood when conditions favor successful signal acquisition and reducing reception attempts when power conservation is prioritized, thereby maintaining time accuracy efficiently.
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 enhances the reliability of satellite signal reception, reduces wasteful power consumption, and maintains time accuracy by optimizing the reception process based on user behavior and environmental conditions.
Implementation Method 1
solar panel power output corresponds to the illuminance of the light incident to the solar panel
Implementation Method 2
receive satellite signals from positioning information satellites such as GPS satellites
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A satellite signal reception device can reliably execute a satellite signal reception process. The satellite signal reception device has a reception time setting unit 71 that sets a reception time; a timekeeping unit that keeps internal time; and a scheduled reception control unit 72 that executes a time-based reception process that operates the reception unit when the time kept by the timekeeping unit reaches the reception time. By having a scheduled reception control unit 72, the reception process can be executed when the internal time goes to the reception time set by the reception time setting unit 71. The reception process is therefore executed once a day. The satellite signal reception process can therefore be executed reliably without being affected by how the device is used, the season, weather, or other factors.