Camera Coupling Member Vibration Isolation for Precision Measurement
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Solution Overview
Problem
Existing vibration measurement devices struggle to accurately measure vibrations when the spatiotemporal frequency band of the vibration overlaps with the frequency bands of the camera's movement and vibration components.
Innovation Solution
A moving image data acquisition device and system that includes a camera supported by a drone and a coupling member, such as a spring, with a natural vibration frequency lower than the measurement target's vibration frequency, allowing for effective isolation of the camera's vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the camera is directly mounted on the support without vibration isolation, then the device complexity is reduced, but the measurement precision deteriorates due to overlapping frequency bands between camera vibration and measurement target vibration
Solution Approach 1:
A coupling member is introduced as an intermediary component between the support and the camera. This coupling member has a natural vibration frequency lower than the measurement target frequency, allowing it to act as a vibration filter that blocks high-frequency vibrations from the camera while transmitting low-frequency vibrations from the measurement target to the camera for accurate measurement.
Solution Approach 2:
The natural vibration frequency of the coupling member is specifically designed to be lower than the frequency of the measurement target. By changing the frequency parameter of the coupling member, the system achieves frequency-based vibration isolation, where the coupling member naturally attenuates vibrations above its natural frequency while allowing the measurement target's vibrations to pass through to the camera.
2Measurement precision
If a coupling member with low natural vibration frequency is introduced to isolate camera vibrations, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The coupling member serves as a mediator that selectively transmits or blocks vibrations based on frequency. It is positioned between the support and the camera to filter out camera-induced vibrations while preserving the measurement target's vibration signals, achieving frequency-based vibration isolation.
Solution Approach 2:
The coupling member's natural vibration frequency is deliberately set below the measurement target frequency. This parameter selection creates a frequency separation that allows the coupling member to act as a passive low-pass filter for vibrations, automatically isolating high-frequency camera vibrations without requiring active control systems.
3Measurement precision
If the camera vibration frequency overlaps with the measurement target frequency, then the device complexity remains simple, but the measurement precision deteriorates due to inability to separate vibration sources
Solution Approach 1:
The coupling member's natural frequency is designed to be lower than the measurement target frequency, creating a frequency gap. This parameter change causes the coupling member to naturally attenuate frequencies above its natural frequency, effectively filtering out camera vibrations while transmitting the measurement target's vibrations to the camera for accurate measurement.
Solution Approach 2:
The coupling member acts as a frequency-selective intermediary that blocks harmful high-frequency camera vibrations from reaching the camera sensor, while allowing the lower-frequency measurement target vibrations to pass through. This intermediary component resolves the frequency overlap problem by creating a frequency-based separation.
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
Enables accurate measurement of vibrations by isolating the camera's vibrations from the measurement target's vibrations, thereby improving the precision of vibration measurement.
Implementation Method 1
the coupling member has a natural vibration frequency in a vibration frequency region lower than a vibration frequency region serving as a measurement target for vibration measurement using moving image data acquired by the camera
Data Source
AI summary
A moving image data acquisition device includes a camera, a support that supports the camera, and a coupling member that couples the support and the camera, wherein the coupling member has a natural vibration frequency in a vibration frequency region lower than a vibration frequency region serving as a measurement target for vibration measurement using moving image data acquired by the camera.