Radio-Controlled Timepiece Code Sequence Extraction
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Solution Overview
Problem
Conventional radio-controlled timepieces face inefficiencies in obtaining date/time information from satellite waves, leading to increased battery size and weight due to high energy consumption, as they receive and verify unnecessary data for integrity, which is not essential for date/time accuracy.
Innovation Solution
A radio-controlled timepiece that generates an expected code sequence based on counted date/time and compares it with the incoming code sequence from satellite waves, allowing for efficient acquisition of date/time information by focusing only on necessary data, reducing the need for decoding and verifying unnecessary bits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the timepiece receives and verifies all satellite wave data for integrity using parity data, then date/time information can be obtained with high reliability, but the energy consumption increases significantly
Solution Approach 1:
The patent extracts only the essential code sequence portions needed for date/time identification from the complete satellite signal. Instead of processing and verifying all transmitted data including parity bits and non-essential fields, the system selectively receives and processes only the code sequences that are critical for time synchronization, thereby reducing energy consumption while maintaining reliability
Solution Approach 2:
The patent applies partial action by performing verification only on the extracted code sequence portions rather than the entire satellite message. The system verifies the integrity of the essential time-coding bits without unnecessarily verifying parity data and other non-essential portions of the signal, achieving sufficient reliability with reduced processing energy
2Reliability
If the timepiece processes and verifies unnecessary data blocks with parity verification, then data integrity is ensured, but the reception time is extended
Solution Approach 1:
The patent extracts and processes only the essential code sequence portions containing time information from the complete satellite signal. By separating the essential time-coding bits from non-essential data and parity bits, the system performs verification only on the extracted portions, significantly reducing reception time while maintaining data integrity for the critical time information
Solution Approach 2:
The system performs partial verification by applying integrity checks only to the extracted code sequences that contain time information, rather than verifying the entire satellite message including all parity bits and non-essential data blocks. This partial approach reduces reception time while ensuring reliability of the time data
3Adaptability or versatility
If the timepiece receives complete satellite signals with all data blocks, then all information is available, but the device size and weight increase
Solution Approach 1:
The patent extracts only the essential code sequence portions needed for time synchronization from the complete satellite signal. By selectively receiving and processing only the time-critical bits rather than storing and processing all satellite data blocks, the system reduces the required memory and processing capacity, thereby reducing device weight and size while maintaining adaptability for timekeeping functionality
Data Source
AI summary
A radio-controlled timepiece includes: a radio wave reception unit that receives satellite waves and extracts an incoming code sequence encoded in the received satellite waves; a counter unit that counts a date/time of the radio-controlled timepiece; and a processor that: generates an expected code sequence containing at least a portion of a preamble code and a code generated on the basis of the date/time counted by the counter unit that are expected to be part of the incoming code sequence that is extracted, detects a match between the expected code sequence that has been generated and the incoming code sequence by sequentially comparing the expected code sequence with the incoming code sequence, and acquires a present date/time, as indicated by the satellite waves, in accordance with a detection timing of the match, as measured by the data/time counted by the counter unit.