Galvanometer Signal Synchronization via Real-Time Waveform Feedback
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Solution Overview
Problem
In 3D imaging, the synchronization of galvanometer driving signals, laser scanning signals, and camera exposure signals is challenging due to response speed issues and hardware wear, leading to deviations in the obtained fringe diagrams, which complicates the process and reduces the intelligence and accuracy of the imaging system.
Innovation Solution
A modulation method for imaging scanning signal synchronization that involves transmitting control signals with a galvanometer driving signal and camera exposure signal having the same period, measuring and filtering the actual signal waveform of the galvanometer, performing waveform comparison detection to determine deviations, and adjusting the control signals to match the actual oscillation state of the galvanometer, ensuring accurate synchronization and fringe diagram accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the galvanometer, laser device and camera are driven to obtain an actual scene fringe diagram for comparison with a pre-synthesized diagram, then the accuracy of the fringe diagram can be improved, but the process complexity increases and the intelligence degree decreases
Solution Approach 1:
The patent implements a feedback mechanism where the actual oscillation state of the galvanometer is detected in real-time, and the control signals are dynamically adjusted based on the detected deviation. This eliminates the need for pre-synthesis and complex comparison processes, achieving both high accuracy and process simplicity through real-time self-correction.
Solution Approach 2:
The system performs self-adjustment by automatically detecting its own oscillation state and correcting its control signals without external intervention. The galvanometer system serves itself by monitoring its own performance and making real-time corrections, eliminating the need for manual pre-synthesis and comparison operations.
2Manufacturing precision
If the galvanometer driving signal, laser scanning signal and camera exposure signal are strictly synchronized, then the fringe diagram quality can be improved, but the system complexity and adjustment difficulty increase
Solution Approach 1:
The patent uses real-time feedback from the galvanometer's actual oscillation state to dynamically adjust the phase and frequency of control signals. This ensures strict synchronization between the galvanometer, laser, and camera without requiring complex pre-configured synchronization systems, achieving high fringe diagram quality with simplified synchronization.
Solution Approach 2:
The synchronization system is made dynamic by continuously adapting the control signals based on real-time detection of galvanometer oscillation state. Instead of fixed static synchronization parameters, the system dynamically adjusts timing and phase to maintain optimal synchronization, reducing system complexity while improving fringe diagram quality.
3Measurement precision
If the actual oscillation state of the galvanometer is detected and control signals are adjusted in real-time, then the synchronization accuracy can be improved, but the measurement and detection difficulty increases
Solution Approach 1:
The patent introduces an intermediary detection mechanism that indirectly measures the galvanometer's oscillation state through its effect on the control signals or associated components. This intermediary approach simplifies the detection process compared to direct measurement of galvanometer oscillation, reducing measurement difficulty while maintaining high synchronization accuracy.
Data Source
AI summary
The present disclosure provides a modulation method, apparatus, and system for imaging scanning signal synchronization. The method includes: transmitting control signals, wherein the control signals include a galvanometer driving signal, a laser scanning signal, and a camera exposure signal, the galvanometer driving signal and the camera exposure signal have a same period, and the laser scanning signal enables laser to be emitted for N times within time for enabling positive oscillation of a galvanometer in one period of the galvanometer driving signal; measuring an actual signal waveform of the galvanometer, and obtaining a noise-reduced waveform by filtering and de-noising the actual signal waveform; performing a waveform comparison detection on the noise-reduced waveform and a corresponding control waveform for the galvanometer driving signal to obtain a waveform deviation; and adjusting the control signals based on the waveform deviation and transmitting the adjusted control signals.