Radio-Controlled Timepiece Week Number Lap Determination
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Solution Overview
Problem
Radio-controlled timepieces face challenges in determining the lap of the week number after battery consumption or reset, leading to difficulties in obtaining accurate date and time information without manual intervention or reliance on specific radio wave reception.
Innovation Solution
A radio-controlled timepiece with a receiving unit, date/time information obtaining unit, operating unit, term obtaining unit, first term setting unit, and date/time calculating unit, which allows flexible identification of the week number lap by setting a 10-year date/time specified range and recalculating the present date and time based on user input and GPS satellite data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radio-controlled timepiece uses GPS satellite radio waves to obtain date/time information, then the reception speed and accuracy are improved, but the ability to determine the week number lap becomes problematic after battery reset
Solution Approach 1:
The timepiece stores the reception date/time in non-volatile memory before battery reset occurs. After reset, this stored date/time serves as a reference point to quickly determine the current week number lap without requiring manual input or complex calculations, thus maintaining ease of operation while preserving measurement precision.
Solution Approach 2:
The system creates a copy of the date/time information in non-volatile memory that persists across battery resets. This copy serves as a reference that eliminates the need to重新 determine the week number lap from scratch, resolving the contradiction between maintaining accuracy and operational simplicity.
2Reliability
If the radio-controlled timepiece resets after battery replacement, then the operation is refreshed, but the date/time information is lost making lap determination difficult
Solution Approach 1:
The system prepares by storing date/time information in non-volatile memory before battery reset occurs. This advance preparation cushions against the information loss that would otherwise occur during reset, ensuring that the week number lap can be quickly determined after reset without manual intervention.
3Measurement precision
If conventional methods use table data to determine week number lap, then the lap can be identified, but the configuration becomes complex and processing becomes troublesome
Solution Approach 1:
The invention extracts only the essential date/time information needed for lap determination and stores it in non-volatile memory. This eliminates the need for complex table data structures and complicated processing logic, achieving simple configuration and processing while maintaining accurate week number lap identification.
Solution Approach 2:
The system changes the approach from using complex table data to using a simple stored date/time parameter. By storing the reception date/time and using it as a reference point, the system achieves accurate lap determination with minimal configuration and processing complexity.
Data Source
AI summary
A radio-controlled timepiece is shown including the following. A receiving unit receives a transmitting radio wave including date/time information from a positioning satellite. A date/time information obtaining unit obtains a week number and elapsed time within a week as the date/time information. An operating unit receives operation. A term obtaining unit obtains a value of a 10 year digit of a present date and time. A first term setting unit sets a first date/time specified range including 10 years corresponding to the obtained value of the 10 year digit and a term adjacent to the 10 years with a predetermined length. A first date/time calculating unit calculates the present date and time within the set first date/time specified range. A date/time correcting unit corrects the date and time of a timekeeping unit based on the present date and time.