Electronic Watch Indoor Time Correction via Beacon Signal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic watches face challenges in accurately correcting time indoors, particularly in buildings made of reinforced concrete, due to the difficulty in receiving satellite signals, and have limited storage capacity to store beacon identification information for time correction.
Innovation Solution
An electronic watch equipped with both a satellite signal receiver for outdoor time correction and a beacon signal receiver for indoor time correction, using Bluetooth Low Energy communication, along with a storage unit to store beacon identification information and time difference data, allowing for accurate time and time difference correction even with limited storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If satellite signals are received for time correction, then time correction accuracy is improved, but indoor time correction becomes impossible due to reinforced concrete blocking radio waves
Solution Approach 1:
The time correction system is segmented into two distinct reception paths: satellite signal reception for outdoor use and beacon signal reception for indoor use. The electronic device can switch between these segments based on the reception environment, allowing high-accuracy time correction outdoors while maintaining functionality indoors through beacon signals.
2Measurement precision
If all beacon identification information is stored for indoor time correction, then indoor time correction accuracy is improved, but storage device capacity requirements increase enormously
Solution Approach 1:
The system extracts only the necessary beacon identification information that corresponds to the user's actual location or frequently visited places, rather than storing all possible beacon data. This selective extraction approach enables accurate indoor time correction at the user's location while significantly reducing the storage capacity requirements.
3Adaptability or versatility
If both satellite and beacon signal reception functions are added, then time correction versatility is improved, but device complexity increases
Solution Approach 1:
The electronic device incorporates multi-functionality by integrating both satellite signal reception and beacon signal reception capabilities into a single time correction system. This universal approach allows the device to perform time correction in both outdoor and indoor environments using the appropriate signal type, thereby improving versatility without requiring separate dedicated systems.
Data Source
AI summary
An electronic watch includes a GPS receiver, a first time correction unit configured to correct time using the time information received by the GPS receiver, a beacon receiver configured to receive a beacon signal containing beacon identification information transmitted from a beacon installed indoors, a first storage unit configured to store beacon identification information and time difference information corresponding to the beacon identification information, a second time correction unit configured to correct a time difference using the beacon signal received by the beacon receiver and the time difference information stored in the first storage unit, and a button configured to accept a reception instruction of the beacon signal, which is operated by an operator. The beacon receiver is configured to receive a beacon signal when the button accepts the reception instruction.