Optical Fiber Tip Resonance Tracking for Scanning Apparatus
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Solution Overview
Problem
The resonance frequency of optical fibers in scanning apparatuses varies due to manufacturing errors, external forces, and temperature changes, leading to reduced energy efficiency and performance if not continuously adjusted.
Innovation Solution
An optical scanning method and apparatus that detects the resonance frequency by sweeping the vibration frequency over a predetermined range, determining a driving frequency based on the detected resonance, and adjusting it to maintain efficient scanning, with mechanisms to detect phase differences between current and voltage signals for precise vibration control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the optical fiber is driven at a fixed resonance frequency determined by design values, then the scanning operation is simple, but the resonance frequency shifts due to manufacturing errors, external forces, and temperature changes leading to reduced energy efficiency and performance
Solution Approach 1:
The patent implements a feedback mechanism where the resonance frequency is continuously detected by measuring the phase difference between driving voltage and current signals. The detected resonance frequency is fed back to the driving frequency determination unit, which adjusts the driving frequency to match the actual resonance frequency, thereby maintaining energy efficiency despite frequency shifts
Solution Approach 2:
The system performs self-adjustment by automatically detecting its own resonance frequency through phase difference measurement and autonomously correcting the driving frequency without external intervention, ensuring continuous optimal performance
2Loss of energy
If the resonance frequency is continuously detected and adjusted, then energy efficiency is maintained, but the system complexity increases due to additional detection and control mechanisms
Solution Approach 1:
The patent makes the driving unit multi-functional by enabling it to both drive the optical fiber vibration and detect the resonance frequency through phase difference measurement. This integration reduces the need for separate detection apparatus while maintaining energy efficiency
Solution Approach 2:
The patent uses the phase difference between voltage and current signals as an intermediary parameter to indirectly detect resonance frequency. This approach avoids complex direct measurement mechanisms while providing accurate frequency detection
3Stability of the object's composition
If the driving frequency is not adjusted to match the actual resonance frequency, then the system operation is stable, but performance reduction occurs due to frequency shifts from manufacturing errors and environmental changes
Solution Approach 1:
The patent transitions the system from a static fixed-frequency operation to a dynamic adaptive operation where the driving frequency automatically adjusts to track the actual resonance frequency, maintaining both stability and reliability under varying conditions
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 prevents performance reduction due to resonance frequency shifts, ensures efficient scanning, and allows for early detection of abnormalities, maintaining stable image acquisition and energy efficiency.
Implementation Method 1
the optical fiber is vibrated by disposing a piezoelectric element near the support
Implementation Method 2
detecting a resonance frequency of a tip of a fiber while sweeping a vibration frequency of the tip of the fiber over a predetermined frequency range
Data Source
AI summary
An optical scanning method includes detecting a resonance frequency of a tip of a fiber while sweeping a vibration frequency of the tip of the fiber over a predetermined frequency range, the tip of the fiber being supported to allow oscillation, determining a driving frequency of the tip of the fiber on the basis of the detected resonance frequency, and scanning light over an object by causing the light to be emitted from the tip of the fiber while driving and vibrating the tip of the fiber at the driving frequency.