3D Coordinate Measuring Device with Movable Table
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional three-dimensional coordinate measuring devices face limitations in operability and measurement object size due to downsizing, leading to restricted measurement ranges and challenges in maintaining constant image quality, especially when used by operators in manufacturing sites.
Innovation Solution
A three-dimensional coordinate measuring device with a translatable and rotatable table, a probe for designating measurement positions, a probe position and attitude identifying unit, a displacement resistance mechanism, and a relative position coordinate calculation unit to ensure accurate measurement coordinates, allowing for intuitive operation and expanded measurement capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the three-dimensional coordinate measuring device is downsized to improve portability and ease of installation, then the device can be installed at manufacturing sites, but the measurement range is limited by the user's reach ability
Solution Approach 1:
The table is designed to be movable rather than fixed, allowing it to translate and rotate to different positions. This dynamic capability enables the measurement range to extend beyond the user's static reach, as the table can be repositioned to bring different workpiece areas within the user's reach while maintaining an ergonomically comfortable operating position
Solution Approach 2:
The measurement system is divided into separable components: the stationary camera unit and the movable table with workpiece. By separating the measurement device from the workpiece support, the system allows the table to be repositioned independently to expand measurement range without requiring the entire system to be large or fixed
2Area of stationary object
If the table is made movable to expand measurement range, then larger objects can be measured, but the table may displace during operation affecting measurement accuracy
Solution Approach 1:
A displacement detection mechanism continuously monitors the table's position and provides feedback to the coordinate calculation system. The displacement amount detecting unit measures any table movement, and this information is used to compensate for position changes in the coordinate calculations, ensuring measurement accuracy is maintained even when the table is repositioned
Solution Approach 2:
The system replaces purely mechanical positioning with an optical-mechanical hybrid approach. Instead of relying solely on mechanical rigidity to maintain position, the system uses optical detection (camera and displacement sensing) to monitor and calculate coordinates, compensating for mechanical displacements through computational methods
3Measurement precision
If a rigid frame structure is used to maintain measurement accuracy, then high coordinate detection accuracy is achieved, but the device requires thermostatic chamber installation and expertise
Solution Approach 1:
The patent replaces the rigid mechanical frame structure with an optical measurement system. Instead of relying on mechanical stability achieved through thermostatic chambers and precision engineering, the system uses a camera to optically detect markers and calculate coordinates computationally, eliminating the need for controlled environmental conditions and specialized installation expertise
Solution Approach 2:
The system creates an optical copy of the workpiece coordinates through camera imaging rather than direct mechanical contact or rigid structure reference. By capturing images of markers on the workpiece and calculating coordinates from these optical copies, the system achieves high accuracy without requiring the physical measurement structure to be rigid or environmentally controlled
Data Source
AI summary
A three-dimensional coordinate measuring device of the present invention achieves high operability and relaxes limitations on the size of a measurement object. A table which places a measurement object thereon is translatable and/or rotatable around a predetermined axis. A position and an attitude of a probe that is capable of designating a measurement position of a measurement object are identified. A displacement resistance mechanism that generates, when an external force is applied to the table in a displacement direction of the table, a certain resistance force against the external force is provided. A table displacement identifying unit that identifies a displacement amount of the table from an original position is provided. Relative position coordinates of a position designated by the probe are obtained on the basis of the position and the attitude of the probe and the displacement amount of the table.