Shape Measuring Device Posture Adjustment via Patterned Light
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Solution Overview
Problem
Existing shape measuring devices face challenges in accurately measuring complex surfaces due to issues like shading and multiple light reflections, making it difficult to adjust the posture of the measuring object for precise shape measurement.
Innovation Solution
A shape measuring device that uses a combination of first and second light patterns for posture checking and shape measurement, allowing for easy recognition and adjustment of measurement difficulty portions, such as areas with shading or multiple reflections, by displaying the image of the object with the first pattern before measurement and generating stereoscopic shape data using a triangular distance measuring method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the measuring object is irradiated with light for shape measurement, then shape data can be obtained, but accurate measurement is not possible in portions where shade is formed or multiple reflection occurs
Solution Approach 1:
The system performs preliminary posture checking by irradiating the measuring object with light before actual shape measurement. This preliminary action identifies areas where accurate measurement is difficult (shaded areas, multiple reflection areas) and allows the operator to adjust the object posture in advance, preventing measurement errors before they occur.
Solution Approach 2:
The system provides visual feedback by displaying the measured shape data and highlighting portions where accurate measurement is difficult. This feedback mechanism allows the operator to understand measurement quality and adjust the object posture accordingly, creating a closed-loop system for improving measurement accuracy.
2Measurement precision
If the posture of the measuring object is adjusted to achieve accurate measurement, then measurement accuracy improves, but it is not easy to appropriately adjust the posture depending on the shape of the measuring object
Solution Approach 1:
The system introduces an intermediary visual display that shows the measured shape data and highlights problematic areas. This intermediary provides the operator with information about measurement quality without requiring complex judgment, making posture adjustment easier and more intuitive.
Solution Approach 2:
The system replaces manual trial-and-error posture adjustment with an automated light irradiation and measurement system. The computer-controlled light projecting unit and image processing automatically identify measurement difficulties, reducing the complexity of manual posture adjustment operations.
3Device complexity
If the same light pattern is used for both posture checking and shape measurement, then the system is simpler, but it is difficult to recognize measurement difficulty portions before measurement
Solution Approach 1:
The system segments the light patterns into two distinct types: a first light pattern for posture checking and a second light pattern for shape measurement. This segmentation allows each pattern to be optimized for its specific purpose, with the first pattern designed to highlight measurement difficulty areas for posture adjustment.
Solution Approach 2:
The system uses different visual representations (analogous to color changes) by displaying images captured under different light patterns. The first light pattern produces images that highlight measurement difficulty portions, while the second pattern produces images for accurate shape measurement, allowing the operator to distinguish between the two functions visually.
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 easy adjustment of the object's posture for accurate shape measurement by clearly identifying measurement difficulty areas, improving the accuracy and efficiency of shape measurement processes.
Implementation Method 1
a light receiving unit arranged above the stage, and configured to receive light reflected by the measuring object mounted on the stage
Implementation Method 2
a data generating unit configured to generate stereoscopic shape data indicating a stereoscopic shape of the measuring object by a triangular distance measuring method based on the light receiving signal
Data Source
AI summary
The invention provides a shape measuring device, a shape measuring method, and a shape measuring program capable of easily adjusting a posture of a measuring object to a state appropriate for shape measurement before the shape measurement of the measuring object. A measuring object is irradiated with light having a pattern for posture checking by a light projecting unit before the shape measurement. An image of the measuring object captured by a light receiving unit is displayed on a display section in this state. The posture of the measuring object is adjusted with the measuring object being irradiated with the light having the pattern for posture checking by the light projecting unit.