GPS Wristwatch Adaptive Reception Timing
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Solution Overview
Problem
Existing electronic timepieces face challenges in efficiently receiving satellite signals and maintaining accurate time due to indoor/outdoor recognition errors, multipath interference, and narrow open angles caused by tall buildings, which affect the reliability and power consumption of GPS signal reception.
Innovation Solution
An electronic timepiece with a reception unit that adjusts its signal reception start time based on previous successful reception times, stored in a reception result storage unit, to optimize signal acquisition during periods of high probability of successful reception, reducing power consumption and preventing wasteful reception processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If satellite signal reception is performed continuously or at fixed intervals, then time information can be acquired regularly, but power consumption increases and wasteful reception processes occur when reception is unlikely to succeed
Solution Approach 1:
The reception start time is dynamically adjusted based on stored reception results rather than being fixed. The system learns from past reception successes and failures to optimize future reception timing, making the reception schedule adaptive to actual signal conditions and user patterns.
Solution Approach 2:
The system stores reception results and uses this feedback information to determine future reception start times. By analyzing whether previous reception attempts succeeded or failed, the system adjusts the timing of subsequent receptions to maximize success probability while minimizing energy waste.
2Ease of operation
If satellite signal reception is performed at fixed times, then the reception process is simple to manage, but the probability of successful reception decreases when user patterns change
Solution Approach 1:
The reception schedule transitions from static fixed times to dynamic adaptive timing. The system automatically adjusts reception start times based on stored results, adapting to changing user patterns and environmental conditions without requiring manual reconfiguration.
Solution Approach 2:
The system autonomously optimizes its own reception schedule by learning from past performance. It automatically determines the best times for future receptions based on stored results, eliminating the need for manual intervention while improving reception success rates.
3Reliability
If reception is performed when reception conditions are uncertain, then time information may be acquired, but incorrect time display may occur due to reception errors
Solution Approach 1:
The system performs preliminary analysis of stored reception results before initiating new reception processes. By evaluating past reception outcomes, it predicts optimal timing conditions that are more likely to yield successful and accurate time information acquisition.
Solution Approach 2:
The system uses feedback from previous reception results to guide future reception timing decisions. This feedback mechanism helps ensure that receptions are attempted at times with higher probability of success, reducing the likelihood of erroneous time acquisition.
Data Source
AI summary
An electronic timepiece efficiently receives satellite signals, reduces power consumption, and displays the correct time. A GPS wristwatch 1 has a satellite signal reception unit 10A that receives satellite signals and acquires time information contained in the satellite signals; a time information adjustment unit 25 that keeps times and adjusts the kept time based on the time information acquired by the automatic receiving unit 24; a reception result memory unit 313 that stores the reception result of the reception process performed by the automatic receiving unit 24; and a reception time setting unit 21 that sets the reception start time at which the reception process starts based on the reception result stored in the reception result memory unit 313. The automatic receiving unit 24 executes the reception process when the kept time reaches the reception start time set by the reception time setting unit 21.