Contact Piece Model for Texture-Aware Replacement
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Solution Overview
Problem
Conventional methods for determining whether to replace a contact piece in a contact measurement system are inaccurate due to fluctuations in roughness parameters caused by the surface texture of the workpiece, leading to potential deformation that may affect measurement quality.
Innovation Solution
A surface texture measuring device and method that involves obtaining a first pseudo measurement point sequence from a reference workpiece, generating a contact piece model, and calculating a second pseudo measurement point sequence by simulating the contact piece's surface interaction with the workpiece, allowing for accurate replacement determination based on the simulated sequence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional replacement determination is made based on roughness parameter obtained by measuring reference workpiece with contact piece, then the inspection process is simple, but the determination accuracy is insufficient due to surface texture variations
Solution Approach 1:
The patent performs preliminary actions by: (1) measuring the reference workpiece to obtain first pseudo measurement points before actual measurement, (2) generating a contact piece model in advance, and (3) creating simulated measurement data beforehand. These preliminary steps enable accurate replacement determination during actual measurement without requiring complex real-time analysis.
Solution Approach 2:
The patent creates a contact piece model that copies the geometric features of the actual contact piece. This model is then used to generate simulated measurement data that replicates what would be obtained from actual measurement. By comparing simulated data with actual measurement data, the system achieves accurate replacement determination without directly measuring the contact piece itself.
2Reliability
If roughness parameter is used for replacement determination, then the measurement process is quick, but the result is inaccurate because the parameter changes fluctuate with workpiece surface texture
Solution Approach 1:
The patent introduces simulated measurement data as an intermediary between the contact piece model and the replacement determination process. This simulated data serves as a reference that accounts for surface texture variations, enabling reliable determination without requiring extensive actual measurement time. The simulation acts as a mediator that translates the contact piece model into comparable measurement data.
Solution Approach 2:
The patent changes the approach from using only roughness parameters to using a comprehensive comparison between simulated and actual measurement data. By varying the measurement approach to include simulated data generation and comparison, the system achieves reliable replacement determination while maintaining efficiency.
3Manufacturing precision
If conventional measurement method is used without considering contact piece deformation, then the measurement process is simple, but measurement quality is affected by undetected deformation
Solution Approach 1:
The patent performs preliminary measurement of the reference workpiece to detect contact piece deformation before actual measurement. By obtaining first pseudo measurement points and comparing them with expected values, the system identifies deformation in advance, preventing measurement quality degradation.
Solution Approach 2:
The patent creates a digital copy of the contact piece through the contact piece model. This model allows virtual measurement and comparison to detect deformation without affecting the physical measurement process. The copied model serves as a reference to identify any deviations caused by contact piece degradation.
Data Source
AI summary
Surface texture measuring device includes: first pseudo measurement point sequence obtaining means which drives contact piece to trace a surface of reference workpiece having reference shape and obtains locus of certain position of the contact piece as first pseudo measurement point sequence; contact piece model calculating means which calculates, based on first pseudo measurement point sequence and design surface specifying the reference workpiece surface, a contact piece model representing surface shape of the contact piece and placed in pseudo space; second pseudo measurement point sequence obtaining means which places contact piece model such that its surface contacts a reference surface specifying a workpiece surface and it takes the same posture as contact piece in measurement, and calculates reference position of the contact piece model as second pseudo measurement point sequence; and replacement determination means which determines whether to replace contact piece based on second pseudo measurement point sequence.