Eyeglass Frame Shape Measurement Apparatus for High-Curve Rims
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Solution Overview
Problem
Existing eyeglass frame shape measurement apparatuses fail to accurately measure high-curve frames, as the tracing stylus diverges from the rim grooves, leading to incomplete measurements, and require manual input for position relationship data between right and left rims, which is time-consuming and prone to errors.
Innovation Solution
An eyeglass frame shape measurement apparatus with multiple measurement modes, including a two-rim support trace mode, one-rim support trace mode, and nose side portion trace mode, utilizing a controller to drive the measuring unit and compute matching processing to obtain accurate position relationship data between the rims, such as geometric inter-center distance and curve angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two-rim support trace mode is used to measure high-curve frames, then position relationship data between right and left rims can be obtained, but the tracing stylus diverges from the rim grooves causing measurement failure
Solution Approach 1:
The patent implements dynamic adjustment of the tracing stylus inclination angle during measurement. The controller adjusts the inclination angle of the tracing stylus based on the measured position and shape data, allowing the stylus to adapt to the curve of the rim and maintain contact with the groove throughout the measurement process, preventing divergence on high-curve frames
Solution Approach 2:
The patent employs feedback control where the controller continuously monitors the measurement progress and adjusts the tracing stylus orientation based on the detected rim geometry. This feedback mechanism ensures the stylus remains aligned with the rim groove even on highly curved frames, maintaining measurement reliability
2Reliability
If one-rim support trace mode is used to measure high-curve frames, then the tracing stylus can stay within rim grooves, but position relationship data between right and left rims cannot be obtained
Solution Approach 1:
The patent divides the measurement process into multiple segments: first measuring the rim shape data, then separately obtaining position relationship data through additional measurement modes. The system segments the measurement tasks to ensure both high-curve frame accuracy and complete position data collection
Solution Approach 2:
The patent makes the measurement apparatus multi-functional by enabling it to perform both rim shape measurement and position relationship measurement. The controller can select different measurement modes (two-rim support trace mode, one-rim support trace mode, nose side portion trace mode) to obtain different types of data, making a single apparatus capable of completing all necessary measurements
3Loss of information
If manual measurement is used to obtain position relationship data, then complete data can be collected, but time and labor increase with potential for operator error
Solution Approach 1:
The patent implements self-service automation where the measurement apparatus automatically collects and processes position relationship data without requiring manual intervention. The controller automatically obtains nose width, geometric inter-center distance, and curve angle data through programmed measurement modes, eliminating the need for operators to use external measuring tools and reducing both time and error potential
Data Source
AI summary
An eyeglass frame shape measurement apparatus includes a measuring unit measuring shapes of right and left rims of an eyeglass frame. Measuring modes include a first measuring mode in which whole peripheries of both rims are measured; a second measuring mode in which the whole periphery of one of the right and left rims; and a third measuring mode in which nose side portions of the left rim and the nose side portion of the right rim are partially measured. A controller drives the measuring unit to measure the whole peripheries of both rims in the first measuring mode, for driving the measuring unit to measure the whole periphery of one of the left and right rims in the second mode, and drive the measuring unit to measure partially the nose side portions of both rims in the third mode.