PTZ Camera Rotation Control for Resonance Vibration
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Solution Overview
Problem
PTZ cameras experience vibration and image distortion due to intrinsic resonance frequencies when acceleration is designated externally, leading to potential apparatus failure.
Innovation Solution
An imaging apparatus that communicates with an external device via a network, featuring a rotation unit controlled by both designated and default accelerations to manage vibration, with a control switching unit that adjusts acceleration to prevent vibration by monitoring and controlling the rotational speed within specific ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If acceleration is designated externally from the outside, then the rotation speed can be controlled, but vibration occurs due to intrinsic resonance frequency
Solution Approach 1:
The control unit monitors the rotation speed of the image capturing unit and dynamically adjusts the acceleration in real-time. When the rotation speed approaches the resonance frequency range, the system automatically reduces acceleration to avoid vibration, and increases it when away from resonance, creating a closed-loop feedback control system.
Solution Approach 2:
The system changes the acceleration parameter dynamically based on the current rotation speed. Instead of using a fixed acceleration value, the acceleration is adjusted as a variable parameter that adapts to the rotation state, avoiding constant vibration while maintaining rotation control.
2Productivity
If acceleration is increased to improve rotation response, then productivity increases, but vibration and image indistinctness worsen
Solution Approach 1:
The system transitions from static acceleration control to dynamic acceleration control. The acceleration value changes continuously based on the rotation speed, allowing the system to be aggressive when safe and conservative when necessary, optimizing both response time and image quality throughout the rotation process.
Solution Approach 2:
When the rotation speed is away from the resonance frequency range, the system applies higher acceleration to quickly move through the safe zones. This allows the system to skip through problematic areas rapidly while minimizing time spent in vibration-prone regions, improving overall rotation efficiency.
3Device complexity
If fixed acceleration control is used, then device complexity is reduced, but reliability decreases due to potential apparatus failure from vibration
Solution Approach 1:
The control unit automatically monitors and adjusts acceleration without external intervention. The system serves itself by detecting resonance conditions and correcting acceleration levels independently, eliminating the need for complex external control systems while improving reliability through adaptive protection.
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 effectively reduces vibration and maintains image clarity by dynamically adjusting acceleration, preventing apparatus failure and ensuring stable operation.
Implementation Method 1
vibration or the like may occur due to an intrinsic resonance frequency of the apparatus
Data Source
AI summary
An imaging apparatus to communicate with an external apparatus via a network includes an image capturing unit, a rotation unit, a reception unit, first and second control units, a determination unit, and a control switching unit. The rotation unit rotates the image capturing unit in a predetermined direction. The reception unit receives a control command including information for designating acceleration when the rotation unit rotates the image capturing unit. The first control unit controls the rotation unit at the designated acceleration. The second control unit controls the rotation unit at acceleration that is different from the designated acceleration. The determination unit determines whether a speed at which the rotation unit rotates the image capturing unit is within a predetermined range. The control switching unit switches between the first control unit and the second control unit according to a determination result of the determination unit, and control the rotation unit.