Analog Watch Hand Position Detection Cycle Control
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Solution Overview
Problem
Analog electronic watches face challenges in detecting and correcting hand position displacements caused by shocks, external magnetism, and other environmental factors, leading to unnatural user experiences and prolonged correction times due to limitations in existing hand position detection methods.
Innovation Solution
The implementation of a system that includes a hand position detection mechanism with adjustable detection cycles, allowing for natural hand movement detection and correction, utilizing a stepper motor with piezoelectric shock detection and other environmental factor sensors to efficiently correct hand positions in both forward and reverse directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the hand position detection means operates continuously at a high detection cycle to accurately detect hand position displacements, then the detection accuracy is improved, but the power consumption increases and the natural movement of the hand is disrupted
Solution Approach 1:
The hand position detection means operates intermittently at a predetermined first detection cycle rather than continuously, reducing power consumption while maintaining detection capability. The detection is triggered periodically or based on specific conditions rather than running continuously
Solution Approach 2:
The detection cycle is dynamically changed from a first detection cycle to a second detection cycle with higher frequency when a detection cycle changing condition is met. This allows the system to adapt detection frequency to actual needs, balancing accuracy and power consumption
2Speed
If the detection cycle is increased to detect hand position displacements caused by shocks or external magnetism, then the detection speed is improved, but the natural movement of the hand is disrupted and user uncertainty increases
Solution Approach 1:
The system dynamically adjusts the detection cycle based on detected conditions. When a detection cycle changing condition is detected (such as abnormal hand position), the system switches to a second detection cycle with higher frequency, while maintaining the normal hand drive cycle. This ensures high detection speed only when needed, preserving natural hand movement during normal operation
3Device complexity
If the hand position detection means operates at a fixed detection cycle, then the system complexity is reduced, but the ability to adapt to different operational conditions (shock, magnetism, manual adjustment) is limited
Solution Approach 1:
The detection cycle is made dynamic and adjustable based on operational conditions. The system can switch between a first detection cycle and a second detection cycle with higher frequency when specific conditions are met, such as when shock is detected, external magnetism is detected, or manual time adjustment is performed
Solution Approach 2:
The system detects detection cycle changing conditions in advance (such as shock, magnetism, or manual adjustment operations) and proactively changes the detection cycle before hand position displacement occurs or worsens, enabling prepared response to various operational scenarios
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 solution enables efficient and accurate detection and correction of hand position displacements in real-time, reducing user uncertainty and power consumption while maintaining high accuracy.
Implementation Method 1
a piezoelectric element for detecting shock
Data Source
Figure 1
Figure 2
Figure 3(a)~3(e)
AI summary
An analog electronic watch of the present invention includes: a display unit (2) for displaying time with a position of a hand; a stepper motor (3) for driving the hand; a motor drive unit (4) for controlling driving of the stepper motor at a predetermined hand drive cycle at normal time; hand position detection means (5) for detecting a position of the hand; a hand position detection means control unit (6) for intermittently controlling driving of the hand position detection means (5) at a first detection cycle which is longer than the hand drive cycle; and a detection cycle changing unit (7) for instructing the hand position detection means (5) to change the detection cycle. When detecting a predetermined detection cycle changing condition, the detection cycle changing unit (7) changes a cycle at which the hand position detection means (5) detects a position of the hand, from the first detection cycle to a second detection cycle, while maintaining the hand drive cycle at which the stepper motor (3) drives the hand.