3D Measurement Device Using Parallel Light Lines for High-Speed Shaping
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Solution Overview
Problem
Current 3D shaping and measurement systems face challenges in achieving high-speed and high-accuracy three-dimensional shape measurement without interfering with the shaping process, as existing non-contact methods are inefficient and require extended measurement times.
Innovation Solution
A measurement device comprising a projector, imager, and calculator that projects light lines onto the object, captures images, identifies projection conditions, and calculates line shapes to determine the three-dimensional shape, allowing for simultaneous measurement and shaping with reduced time and improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-contact type three-dimensional shape measurement functions are used to minimize effects on the shaping process, then the shaping process is not interfered with, but the measurement time becomes extended and productivity decreases
Solution Approach 1:
The measurement system segments the measurement process by projecting multiple slit laser lights simultaneously onto different regions of the object. Each slit laser corresponds to a specific measurement region, allowing parallel measurement of multiple areas rather than sequential scanning, thereby reducing total measurement time while maintaining non-contact operation
Solution Approach 2:
The system transitions from one-dimensional sequential scanning measurement to two-dimensional parallel measurement by projecting multiple slit lasers across different spatial positions simultaneously. This dimensional expansion of the measurement approach enables capturing multiple cross-sections of the object at the same time, significantly improving measurement speed
2Measurement precision
If multiple slit laser lights are projected simultaneously to improve measurement efficiency and accuracy, then measurement accuracy improves, but the complexity of identifying and calculating line shapes from different projection conditions increases
Solution Approach 1:
The system performs preliminary action by pre-storing shaping information (CAD data or previously measured data) in the calculator before measurement begins. This pre-stored information is used to identify which light lines correspond to which projection conditions, simplifying the subsequent calculation process by providing reference data in advance rather than requiring complex real-time identification
Solution Approach 2:
The system uses copying by projecting light lines whose patterns are predetermined based on stored shaping information. The calculator references these pre-defined patterns to identify projection conditions, effectively copying known geometric relationships to simplify the matching and calculation process for multiple simultaneous measurements
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 high-speed and accurate three-dimensional shape measurement by capturing and processing light line images in a single batch, reducing measurement time and maintaining the efficiency of the shaping process.
Implementation Method 1
The projector is configured to project a plurality of light lines onto the object for measurement
Implementation Method 2
The imager is configured to capture an image of the object for measurement on which the plurality of light lines are projected
Data Source
Figure 1A~1C
Figure 2~3
Figure 4A~4C
AI summary
A measurement device (310) is configured to measure a three-dimensional shape of an object for measurement. The measurement device (310) includes a projector (300), an imager (301), an identifier (250), and a calculator (250). The projector (300) is configured to project a plurality of light lines onto the object for measurement. The imager (301) is configured to capture an image of the object for measurement on which the plurality of light lines are projected. The identifier (250) is configured to identify a projection condition of the light lines based on shaping information of the object for measurement. The calculator (250) is configured to calculate a plurality of line shapes from the image captured by the imager, based on the projection condition.