Machine Tool Camera Control for Centered Zoom on Moving Targets
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Solution Overview
Problem
Conventional image capturing apparatuses in machine tools face challenges in maintaining the optimal size and central positioning of images of moving targets due to fixed imaging directions and magnifications, which can result in images being captured at the corners of the screen or with incorrect sizes as the spindle head moves.
Innovation Solution
An image capturing apparatus that includes a coordinate value acquisition unit, an image capturing unit, a direction and distance calculation unit, an attitude control unit, and an imaging magnification setting unit, which dynamically adjusts the camera's attitude and imaging magnification based on calculated optical axis directions and distances to ensure the moving target is captured in an optimal size at the center of the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the imaging direction and imaging magnification of the camera are fixed, then the device complexity is reduced, but the target cannot be captured at the central position of the screen with optimal size when the spindle head moves
Solution Approach 1:
The patent applies dynamics by making the camera's imaging direction and magnification adjustable rather than fixed. The attitude control unit dynamically changes the camera's orientation based on the target's position, and the magnification control unit adjusts the zoom level according to the distance calculated from coordinate data. This dynamic adaptation ensures the target remains centrally positioned and optimally sized on the screen throughout the machining process.
Solution Approach 2:
The system implements feedback by continuously acquiring the target's coordinate values during machining, calculating the optical axis direction and distance, and using this information to adjust the camera's attitude and magnification. This closed-loop control ensures real-time adaptation to the moving target's position and maintains optimal imaging conditions throughout the machining operation.
2Manufacturing precision
If the camera attitude and imaging magnification are dynamically adjusted based on calculated optical axis direction and distance, then the target is captured in optimal size at the center of the screen, but the device complexity increases
Solution Approach 1:
The patent achieves multi-functionality by integrating multiple control capabilities into a unified camera system. The same camera unit performs both imaging and positioning functions, while the control system handles both attitude adjustment and magnification control through coordinated processing of coordinate data. This universal approach improves image capture precision without proportionally increasing overall system complexity.
3Measurement precision
If the imaging magnification is corrected based on zooming ratio and length information of the target, then the image size accuracy is improved, but the information processing complexity increases
Solution Approach 1:
The system applies preliminary action by pre-acquiring and storing the target's length information and zooming ratio data before the machining operation begins. This advance preparation allows the imaging magnification to be accurately corrected during machining without requiring complex real-time calculations, thereby improving measurement precision while minimizing processing complexity during the actual operation.
Data Source
AI summary
An image capturing apparatus includes: a coordinate value acquisition unit acquiring first coordinate values serving as position information of a moving target; an image capturing unit capturing an image of the target; a direction and distance calculation unit calculating a direction of an optical axis that connects the target and the image capturing unit and a distance between the target and the image capturing unit on the optical axis based on the first coordinate values and second coordinate values serving as position information of the image capturing unit; an attitude control unit controlling an attitude of the image capturing unit based on the calculated direction of the optical axis; and an imaging magnification setting unit setting an imaging magnification of the target in the image capturing unit based on the calculated distance, wherein the image of the target is captured while changing the imaging magnification and the attitude.