Radio-Watch Time Correction via Partial Frame Reception
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Solution Overview
Problem
Radio-wave timepieces face high power consumption due to the need to continuously receive standard radio waves for time correction, which is inefficient and reduces the operational time of wristwatch-type devices.
Innovation Solution
Implementing a method to detect specific identification data within the standard radio wave frame, allowing for partial frame reception and correction of time data, reducing the frequency and duration of radio-wave reception, thereby minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radio-wave reception circuit operates continuously to receive the whole time code for accurate time correction, then the timekeeping accuracy is improved, but the power consumption increases
Solution Approach 1:
The patent applies partial action by receiving only a portion of the time code frame rather than the entire frame. Specifically, the receiver detects the M signal to synchronize with the frame start, then receives only the necessary time data fields (hour, minute, second) within that frame, avoiding the need to continuously receive all 60 seconds of the complete time code while maintaining sufficient timekeeping accuracy.
Solution Approach 2:
The patent uses preliminary action by detecting the M signal (frame synchronization signal) before receiving the actual time code data. This allows the receiver to precisely identify the start of each time code frame and begin data reception at the optimal moment, ensuring that the necessary time information is captured within a minimized reception window without requiring continuous operation.
2Reliability
If the radio-wave reception time is extended to ensure stable receiving operation and complete time code acquisition, then the reliability of time correction is improved, but the operational time of the wristwatch is reduced
Solution Approach 1:
The patent implements partial action by receiving only the essential time code fields (hour, minute, second) within a single frame rather than continuously receiving the entire 60-second time code frame. The receiver detects the M signal to frame synchronization, then acquires the necessary time data and terminates reception, achieving reliable time correction with minimal reception duration that preserves wristwatch operational time.
Solution Approach 2:
The time code structure itself provides the synchronization mechanism through the M signal, which automatically enables the receiver to identify frame boundaries and begin data acquisition without external control signals. This self-synchronizing mechanism ensures reliable reception within a fixed, minimized time window without requiring extended reception periods.
3Measurement precision
If the whole time code frame is received to correct the internal time, then the time correction accuracy is improved, but the reception time and power consumption increase
Solution Approach 1:
The patent applies partial action by receiving only the critical time correction fields (hour, minute, second data) within the time code frame rather than the entire 60-second frame. The receiver detects the M signal to synchronize with the frame start, then acquires the necessary time fields and stops reception, achieving sufficient time correction accuracy while minimizing reception time and power consumption.
Solution Approach 2:
The patent extracts only the essential time information fields from the complete time code frame. By detecting the M signal to identify the frame structure, the receiver extracts the specific time data fields (hour, minute, second) needed for correction, discarding unnecessary portions of the time code, thereby reducing reception time while maintaining correction accuracy.
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 enables efficient time correction with reduced power consumption by allowing timepieces to correct their internal time using partial radio-wave frame data, extending the operational time of radio-wave timepieces.
Implementation Method 1
a radio-wave reception circuit which receives the standard radio wave
Data Source
AI summary
When lack of a part data on a time code included in a received standard radio wave is detected, the lack is filled up with a corresponding data part of another time code. The time of a radio-wave timepiece is corrected in accordance with the time code whose lack has been filled up.