Eyeglass Frame Shape Measuring Apparatus with Automated Stylus Alignment
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Solution Overview
Problem
High-curve eyeglass frames with deviated bevel grooves require manual operator assistance for accurate measurement, leading to inefficiencies and longer measurement times due to the need for visual alignment of the tracing stylus with the bevel groove.
Innovation Solution
An automated eyeglass frame shape measuring apparatus with a controller that detects the initial position of the tracing stylus and adjusts its movement to ensure accurate insertion into the bevel groove, allowing for autonomous measurement by distinguishing between correct and incorrect initial states and adjusting the measurement operation accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the tracing stylus is automatically positioned at the center of the rim for measurement, then the measurement process can be standardized and automated, but the tracing stylus cannot be inserted into deviated bevel grooves of high-curve frames
Solution Approach 1:
The controller performs preliminary detection of the bevel groove position by moving the tracing stylus toward the rim and detecting contact points. Based on this preliminary detection, the controller calculates the correct insertion position and adjusts the stylus positioning before actual measurement begins, enabling automatic adaptation to deviated bevel grooves
Solution Approach 2:
The detector provides feedback on the tracing stylus position and contact points with the rim. The controller uses this feedback information to determine whether the stylus is properly inserted into the bevel groove and automatically adjusts the positioning if deviation is detected, maintaining automation while adapting to variations in bevel groove position
2Measurement precision
If manual operator assistance is used to align the tracing stylus with the bevel groove, then accurate measurement can be achieved for high-curve frames, but measurement time increases and operator effort is required
Solution Approach 1:
The measurement apparatus performs self-alignment by automatically detecting the bevel groove position and adjusting the tracing stylus positioning without requiring operator intervention. The controller independently completes the alignment process through automated detection and position adjustment, eliminating the need for manual assistance while maintaining measurement precision
Solution Approach 2:
The system performs preliminary detection of the bevel groove position before measurement begins, automatically calculating and executing the correct stylus insertion position. This preliminary automated alignment eliminates the need for manual adjustment during the measurement process, reducing both operator effort and measurement time while ensuring accuracy
3Ease of operation
If the tracing stylus is positioned at the center of the front-to-rear width for standard frames, then the measurement process is simple, but high-curve frames with deviated bevel grooves cannot be measured
Solution Approach 1:
The system dynamically adjusts the tracing stylus positioning based on the detected bevel groove position. Instead of using a fixed center position, the controller calculates and positions the stylus according to the actual rim geometry and bevel groove location, enabling the same simple operation to work for both standard frames and high-curve frames with deviated grooves
Data Source
AI summary
An eyeglass frame shape measuring apparatus includes: a frame holding unit holding an eyeglass frame; a tracing stylus inserted into a bevel groove of the rim; a moving unit moving the tracing stylus; and a controller controls the moving unit and obtains measurement data of a shape of the rim. The controller controls the moving unit based on a first measurement operation to perform a first measurement. The controller decides whether the first measurement is performed in a first state in which the tracing stylus is inserted into the bevel groove at the time of starting the first measurement or a second state in which the tracing stylus is not inserted into the bevel groove at the time of starting the first measurement. If the controller decides that it is the second state, the controller performs a second measurement based on a second measurement operation.