Plate Structural Body Layout for Accurate Position and Angle Recognition
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Solution Overview
Problem
Existing three-dimensional position measurement devices fail to accurately recognize the position and posture of a structural body with respect to a positioning device, particularly when the structural body is assembled with other members, as they only measure the entire subject's three-dimensional position without providing accurate recognition of the portion's position and angle.
Innovation Solution
A structural body is designed in a plate-like shape with positioning holes and position detection areas formed at the end portions, where the holes are positioned apart from the axis line connecting the detection areas, allowing for accurate recognition of the position and angle using imaging apparatuses, enhancing recognition accuracy compared to relying solely on the shape of the end portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the position and angle of the structural body are recognized based on the shape of the end portion, then the measurement process is simple, but the recognition accuracy is low due to processing accuracy errors
Solution Approach 1:
The patent creates optical copies (images) of the positioning hole and detection areas using an imaging apparatus. These captured images serve as reference patterns for determining position and angle, replacing direct physical measurement of the end portion shape. This copying approach eliminates processing accuracy errors while maintaining measurement simplicity.
Solution Approach 2:
The patent introduces an intermediary imaging apparatus and image processing system between the structural body and the measurement system. Instead of directly measuring the end portion shape, the system captures images of the positioning hole and detection areas, then uses these intermediate image data to calculate position and angle, thereby eliminating direct contact measurement errors.
2Measurement precision
If the positioning hole is formed on the axis line connecting the detection areas, then the structure is symmetric and simple, but the angle recognition becomes impossible when rotated around the axis line
Solution Approach 1:
The patent deliberately positions the positioning hole asymmetrically, offset from the axis line connecting the pair of detection areas. This asymmetric arrangement creates a unique geometric relationship that allows the imaging system to distinguish rotational orientation. When the structural body rotates around the axis line, the relative positions of the positioning hole and detection areas change in a detectable manner, enabling accurate angle recognition.
3Measurement precision
If the structural body is assembled with other members, then the functional capability is enhanced, but the position and posture recognition of the assembled portion becomes difficult
Solution Approach 1:
The patent segments the measurement task by focusing on specific localized features (positioning hole and detection areas) rather than attempting to measure the entire assembled structural body. By dividing the recognition problem into detecting these specific marked features, the system can accurately determine position and posture even when the structural body is assembled with other members, as long as the marked features remain accessible and visible.
Data Source
AI summary
Provided is a structural body, formed in a plate-like shape and positioned with respect to an assembly jig including a positioning pin and supporting a first surface of the structural body, including a positioning hole formed through an end portion, a positioning protrusion being inserted into the positioning hole; and a pair of first position detection areas formed on a second surface of the end portion through which the positioning hole is formed. The positioning hole is formed apart from an axis line connecting the pair of first position detection areas.