Optical Shape Measurement of Moving Objects via Line Scan Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for optically detecting the shape of moving objects face challenges due to the need for multiple camera shots, which are often taken sequentially, leading to incongruent images and difficulties in controlling object movement to match optical shape detection requirements, especially in environments with variable or unpredictable object speeds.
Innovation Solution
A device and method that control and monitor object movement using a control device and movement device, allowing for precise adaptation of object speed and movement to match optical shape detection conditions, using a lighting device and recording device such as a line scan camera to capture images under different lighting situations, enabling precise shape capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple camera shots are taken sequentially to determine 3D shape, then measurement completeness is improved, but image congruence deteriorates due to object movement
Solution Approach 1:
The system dynamically adapts to object movement by using a line scan camera that continuously scans the object surface while it moves. The movement control unit synchronizes the scanning process with the object's motion, allowing multiple measurements to be taken along the movement direction without requiring the object to be stationary or requiring complex image registration between sequential shots.
Solution Approach 2:
The patent transitions from capturing 2D images at discrete time points to continuous 1D line scanning along the movement direction. This dimensional change allows the system to capture shape information along the movement axis without suffering from temporal displacement issues, as the line scan integrates measurements continuously across the object's path.
2Productivity
If object movement speed is increased to improve productivity, then manufacturing throughput is improved, but measurement accuracy deteriorates
Solution Approach 1:
The line scan camera performs continuous scanning of the object surface during movement, eliminating idle time between discrete measurements. The measurement process runs continuously alongside object transport, maintaining full utilization of both the sensing system and the object flow, thereby achieving high productivity without sacrificing measurement opportunities.
Solution Approach 2:
The patent replaces mechanical synchronization methods (such as stopping the object or using complex mechanical linkages) with an electronic control system that coordinates the line scan timing with object movement. This electronic coordination allows the system to maintain measurement accuracy while accommodating variable speeds, enabling productivity improvements without compromising precision.
3Productivity
If external movement control is used to maintain object flow, then production workflow is improved, but adaptability to optical detection requirements deteriorates
Solution Approach 1:
The movement control unit serves dual functions: it manages object transport to maintain production workflow and simultaneously coordinates the optical measurement process. This multi-functionality allows the same control system to adapt measurement parameters such as scan speed and timing based on object characteristics and detection requirements, without requiring separate control systems.
Solution Approach 2:
The system incorporates feedback mechanisms where the movement control unit receives information about object position, speed, and measurement progress, then adjusts the line scan timing and positioning accordingly. This closed-loop control enables the system to adapt to varying production conditions while maintaining measurement accuracy, bridging the gap between production requirements and detection needs.
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
This approach enhances the precision and quality of shape capture by ensuring congruent images and adapting movement to optical shape detection parameters, improving accuracy and robustness in detecting moving objects.
Implementation Method 1
using a lighting device (3) and a recording device, in particular a line scan camera (K), to capture images of the object (G) under different lighting situations
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The device (1) has illumination unit (3) that is arranged so that different types of light is effected on the to-be-measured moving object (G). A receiving unit is provided to receive images of the moving object. The movement of the moving object is specified by a control unit (5) using a motion unit (S). An independent claim is included for method for optical shape measurement of moving object.