Pipe End Profile Measurement Using Dual-Axis Scanning Arms
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Solution Overview
Problem
Existing profile measuring devices for pipe ends are inefficient, requiring lengthy measurement times and unable to accurately measure the profile of pipe ends within the desired one-second timeframe due to complex adjustment processes and limited directional movement.
Innovation Solution
A profile measuring device with two measuring arms that move relative to each other in a one-dimensional plane, using probe heads that can scan the surface obliquely, allowing for precise and fast measurement of pipe end profiles by constantly touching the surface and feeding data to a computing unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional 3D measurement methods are used, then measurement accuracy is achieved, but measurement time becomes too long (exceeding 1 second)
Solution Approach 1:
The measurement task is segmented into two independent linear scanning movements along perpendicular axes (X and Y directions). Each measuring arm independently scans one dimension, and the combined data reconstructs the 2D profile. This segmentation converts a complex 3D measurement into simpler 2D linear scans, reducing measurement time to under 1 second while maintaining accuracy through coordinate transformation in the computing unit.
2Adaptability or versatility
If multiple adjustment processes are used to position sensors, then measurement coverage is improved, but device complexity and operation time increase
Solution Approach 1:
The invention adds a second measuring arm oriented perpendicular to the first, transforming a single-linear-axis measurement system into a two-dimensional scanning system. This dimensional expansion allows simultaneous coverage of both X and Y directions without requiring complex angular adjustments or repositioning mechanisms. The computing unit integrates data from both arms to reconstruct the complete profile, achieving comprehensive measurement coverage while maintaining simple linear movement mechanisms.
3Measurement precision
If a boom is moved in different directions on profile rails, then complete profile recording is achieved, but ease of operation decreases due to multiple adjustment processes
Solution Approach 1:
The invention merges the functions of multiple measurement arms into a single integrated runner assembly that moves along a single linear guide. Both measuring arms are fixed to the runner and move together in unison along the X-axis, while the probes themselves scan in the Y-direction. This combining of functions eliminates the need for separate adjustment processes for each measurement arm, simplifying operation while maintaining complete profile recording capability through coordinated linear and oblique movements.
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 quick and accurate measurement of pipe end profiles within 0.8 seconds, reducing measurement errors and meeting stringent tolerance requirements for wall thickness, bevel angles, and end face precision.
Implementation Method 1
Mechanical touch sensing is particularly accurate. The probes constantly scan the surface during the measurement, preferably the probes touch the surface constantly.
Data Source
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Figure 2a~2b
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AI summary
The invention relates to a device for measuring the profile of a surface of a narrow member, especially the profile of the surface of a wall of a pipe end. Said profile measuring device comprises a holding mechanism (8) for the member (7), at least one first measuring arm (4) with at least one first probe (9) that is movable relative to the measuring arm (4) and scans the surface during the measurement, at least one first probe sensor (26) which measures the first relative movement between the at least one first probe (9) and the at least one first measuring arm (4), and a displacing mechanism (2, 3) that modifies the relative position between the at least one first measuring arm (4) and the surface in a one-dimensional direction of travel (L) during the measurement, the direction (S1) of the first relative movement extending at an angle from the direction of travel (L).