Surface Texture Measuring Apparatus Force Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surface texture measuring apparatuses face challenges in maintaining accurate measurement force when the inclination angle of the detector main body is changed, requiring significant memory capacity and increasing user workload, especially when using unregistered styli.
Innovation Solution
A surface texture measuring apparatus with a detector, stage, and relative displacement mechanism, where the measurement arm is configured for circular arc motion and equipped with a detachable stylus, using a measurement arm table to store mass, arm length, and barycenter information for each type of measurement arm, allowing for automatic adjustment of measurement force based on inclination angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement force command values are stored in a table for each combination of stylus holder type, stylus type, and inclination angle, then measurement accuracy is improved, but memory capacity requirements increase significantly
Solution Approach 1:
The patent extracts only the essential parameters (mass M, arm length L, barycenter positions Gx and Gz) from the complete measurement force command value tables. By storing these fundamental geometric and physical parameters instead of pre-computed force values for every possible inclination angle, the memory capacity is significantly reduced while still enabling accurate measurement force calculation through formulas.
Solution Approach 2:
The patent changes the stored parameters from complete measurement force command values (requiring extensive memory) to fundamental geometric and physical parameters (mass, length, barycenter positions). These changed parameters can then be used with mathematical formulas to calculate measurement force for any inclination angle, reducing memory requirements while maintaining measurement accuracy.
2Measurement precision
If measurement force command values are pre-stored for specific inclination angles, then measurement accuracy is improved, but user workload increases when using unregistered styli or unlisted angles
Solution Approach 1:
The patent enables the system to automatically calculate measurement force command values using the stored fundamental parameters (mass, arm length, barycenter positions) and the actual inclination angle. This self-service capability eliminates the need for users to manually look up or input pre-stored command values, significantly reducing user workload while maintaining measurement accuracy for any inclination angle or stylus combination.
Solution Approach 2:
The patent transitions from a static approach (pre-storing fixed command values for specific angles) to a dynamic approach (calculating command values in real-time based on stored fundamental parameters and actual inclination angle). This dynamic calculation method adapts to any inclination angle or stylus combination without requiring prior registration, reducing user workload while maintaining accuracy.
3Adaptability or versatility
If a table-based approach is used for measurement force adjustment, then adaptability to different stylus combinations is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal system where the stored fundamental parameters (mass, arm length, barycenter positions) can be used with any inclination angle and any stylus combination through mathematical formulas. This universal approach eliminates the need for separate pre-stored tables for each specific combination, reducing system complexity while maintaining full adaptability.
Data Source
AI summary
Surface texture measuring apparatus includes a measurement arm table storing mass of an entire measurement arm, an arm length from a supporting point to a stylus, and a horizontal and vertical barycenter of the measurement arm in a horizontal posture for each type of the measurement arm in which a second measurement arm having a different mass is attached; a measurement arm specifier; an inclination angle detector detecting an inclination angle of the detector; and a controller reading out from the measurement arm table the mass, the arm length, the horizontal barycenter, and the vertical barycenter for a specified measurement arm, calculating a difference between a measurement force of the measurement arm in the horizontal posture and a measurement force of the measurement arm in an inclined posture based on the read-out information and the inclination angle detected by the inclination angle detector, and adjusting a measurement force.