Active Vibration Damper for Wide-Band Image Stabilization
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Solution Overview
Problem
Existing vibration damping technologies for image capturing devices, such as digital cameras, are limited by the narrow frequency response characteristic of springs, restricting their ability to effectively damp a wide range of vibrations.
Innovation Solution
A vibration damper system that includes a movable section, a support section, a vibration detector, and a computing processor to detect and correct vibrations by moving the movable section in a direction opposite to the detected displacement, thereby enhancing the control bandwidth and reducing vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring is used to absorb translational motion, then the vibration damping effect is achieved, but the frequency response characteristic is narrow
Solution Approach 1:
The patent replaces the traditional mechanical spring-based vibration damping system with an active control system using actuators and sensors. The sensor detects vibration in the image capturing device, and the actuator generates corrective force based on the detection signal, enabling electronic control of vibration compensation across a broader frequency range.
Solution Approach 2:
The patent changes the control parameters dynamically by adjusting the actuator's driving force based on the detected vibration characteristics. This allows the system to adapt to different vibration frequencies and intensities, expanding the effective frequency response bandwidth beyond what a fixed mechanical spring can achieve.
2Stability of the object's composition
If a flywheel is used to prevent rotational movement, then rotational stability is improved, but the system complexity increases
Solution Approach 1:
The patent substitutes the mechanical flywheel system with an active control system using sensors and actuators. Instead of relying on the physical inertia of a rotating flywheel, the system uses electronic detection and active counterforcement to achieve rotational stability, thereby reducing mechanical complexity.
Solution Approach 2:
The patent introduces a sensor as an intermediary between the vibration source and the control mechanism. The sensor detects rotational vibration and transmits this information to the actuator, which then applies corrective force. This intermediary approach enables precise control without requiring complex mechanical linkages.
Data Source
AI summary
A vibration damper (11) including a movable section ((20) to move in at least one direction; a support section to movably support the movable section; a vibration detector (29) to detect a vibration received by the vibration damper; and a computing processor (30) to compute an amount of displacement of the movable section (20) in a first direction, which is associated with the vibration, based on a detection result of the vibration detector (29) to obtain an amount of correction corresponding to the amount of displacement. The support section moving the movable section (20) in a second direction opposite to the first direction based on the amount of correction obtained by the computing processor (30).