Vibration Correcting Device with Phase-and-Gain Correction
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Solution Overview
Problem
Shooting devices, especially those with movable sections and pan/tilt mechanisms, resonate at their natural frequencies due to manufacturing errors or setting conditions, leading to increased vibration amplitudes and image blurring, which existing vibration correction systems fail to adequately address.
Innovation Solution
A vibration correcting device equipped with an angular-velocity detecting unit, a DC cut filter, an amplifier, an A/D converter, an integrator, a shooting-state determining circuit, and a phase-and-gain correcting circuit that stores correction coefficients for natural vibration frequencies, allowing for phase and gain adjustments to effectively correct vibrations at specific frequencies without detecting the frequency in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a shooting device is set to a floor, wall, or ceiling, then the device can be installed in fixed positions, but the device resonates at natural frequencies due to manufacturing errors or setting conditions, causing image blurring
Solution Approach 1:
The system performs preliminary frequency detection and correction coefficient determination before actual shooting operations. The frequency detection unit detects vibration frequency in advance, and the control unit determines appropriate correction coefficients based on the detected frequency, so that when resonance occurs during shooting, the correction can be applied immediately without delay
Solution Approach 2:
The system changes the parameters of the vibration correction by dynamically adjusting correction coefficients based on detected vibration frequency. The control unit selects different correction coefficients from storage based on the detected frequency, thereby adapting the correction parameters to match the actual resonance conditions of the installation environment
2Reliability
If existing vibration correction systems are used, then general vibration correction is provided, but they fail to adequately address resonance at specific natural frequencies
Solution Approach 1:
The system transitions from static vibration correction to dynamic correction by continuously detecting vibration frequency and adjusting correction coefficients in real-time. The frequency detection unit monitors vibration frequency continuously, and the control unit dynamically updates correction coefficients based on the current frequency, making the correction system adaptive to changing resonance conditions
Solution Approach 2:
The system implements a feedback mechanism where the frequency detection unit continuously monitors vibration frequency, and this information is fed back to the control unit which adjusts the correction coefficients accordingly. This closed-loop feedback ensures that the vibration correction remains effective even when resonance frequency shifts occur
3Measurement precision
If the device detects vibration frequency in real-time, then accurate correction can be applied, but the device complexity and processing requirements increase
Solution Approach 1:
The system performs preliminary frequency detection and correction coefficient determination before actual shooting operations. The frequency detection unit detects vibration frequency in advance, and the control unit determines appropriate correction coefficients based on the detected frequency, so that when resonance occurs during shooting, the correction can be applied immediately without delay
Solution Approach 2:
The system focuses detection and correction efforts on the specific frequency range where resonance is most likely to occur, rather than analyzing the entire frequency spectrum. The frequency detection unit identifies predominant vibration frequencies, and the control unit applies correction coefficients specifically tailored to those frequencies, reducing unnecessary processing complexity
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
The solution provides a suitable vibration correction effect by pre-measuring and storing correction coefficients for natural vibration frequencies, enabling effective vibration control even when the device resonates, thereby reducing image blurring and maintaining image clarity.
Implementation Method 1
an angular-velocity detecting unit
Implementation Method 2
a DC cut filter
Implementation Method 3
an amplifier
Implementation Method 4
an A/D converter
Implementation Method 5
an integrator
Implementation Method 6
a phase-and-gain correcting circuit that stores correction coefficients for natural vibration frequencies
Implementation Method 7
the shooting device may resonate at a frequency that is characteristic of the shooting device due to, for example, setting conditions or manufacturing errors
Data Source
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AI summary
A vibration correcting device includes a vibration detecting unit (1), a vibration correcting unit (11), a storage unit (14), and a controlling unit (COM1). The vibration detecting unit (1) is configured to detect vibration of an image pickup apparatus. The vibration correcting unit (11) is configured to correct blur of an image caused by the vibration. A storage unit (14) is configured to store correction information used for correcting the blur at a predetermined frequency. The controlling unit (COM1) is configured to, on the basis of the correction information, send a control signal to the vibration correcting unit (11).