Vibration-Resistant Image Inspection Device for Conveyance Systems
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Solution Overview
Problem
Image inspection devices face challenges in achieving high-accuracy height dimension inspection due to vibrations in conveyance systems, which require costly antivibration mechanisms and labor-intensive setup processes.
Innovation Solution
An image inspection device that corrects for vibrations by estimating and removing vibration components from two-dimensional profiles using a reference height setting and vibration estimation part, allowing for accurate three-dimensional data generation and inspection without the need for antivibration mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conveyance device is used to move the workpiece for continuous inspection, then productivity is improved, but measurement precision deteriorates due to vibration in the conveyance device
Solution Approach 1:
The patent detects vibration components in the measurement data and uses signal processing to separate and remove these vibration components from the actual measurement signals. This converts the harmful vibration effect into a removable noise component, allowing continuous inspection to proceed without sacrificing measurement accuracy.
Solution Approach 2:
The patent introduces vibration detection sensors and signal processing algorithms as intermediary elements between the conveyance device and the measurement system. These intermediaries detect and characterize the vibration, then enable mathematical separation of vibration effects from actual workpiece geometry, resolving the contradiction between continuous movement and precise measurement.
2Measurement precision
If antivibration mechanisms are introduced to prevent vibration, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces mechanical antivibration mechanisms (such as vibration isolation mounts, dampers, or rigid clamping structures) with a signal processing-based solution. By using software algorithms to detect and remove vibration components from measurement data, the system achieves high precision without adding complex mechanical subsystems.
Solution Approach 2:
The patent introduces vibration detection sensors and signal processing algorithms as intermediary elements between the conveyance device and the measurement system. These intermediaries detect and characterize the vibration, then enable mathematical separation of vibration effects from actual workpiece geometry, resolving the contradiction between continuous movement and precise measurement.
3Measurement precision
If a separate measurement station is prepared to eliminate vibration, then measurement precision is improved, but loss of time increases due to workpiece replacement
Solution Approach 1:
The patent enables continuous measurement during conveyance by removing vibration effects through signal processing. This eliminates the need to stop the conveyance system or replace the workpiece at a separate measurement station, maintaining continuous inspection flow while achieving high precision through mathematical vibration removal.
Solution Approach 2:
The patent replaces mechanical antivibration mechanisms (such as vibration isolation mounts, dampers, or rigid clamping structures) with a signal processing-based solution. By using software algorithms to detect and remove vibration components from measurement data, the system achieves high precision without adding complex mechanical subsystems.
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 high-accuracy outer appearance inspection even in environments with significant vibration, reducing the need for expensive antivibration equipment and simplifying the inspection process.
Implementation Method 1
an irradiation part for applying measurement light to the inspection object relatively moved in one direction; a detection part for detecting reflected light that is applied from the irradiation part to the inspection object and is reflected at the inspection object
Data Source
AI summary
The image inspection device includes a reference height setting part configured to set a reference height as a reference of vibration component estimation, a vibration estimation part configured to estimate a vibration component in an inspection environment, based on the two-dimensional profile generated by the two-dimensional profile generation part and the reference height set by the reference height setting part, a profile correction part configured to remove, from the two-dimensional profile, the vibration component estimated by the vibration estimation part, a three-dimensional data generation part configured to generate three-dimensional data of the inspection object from a plurality of the two-dimensional profiles from which the vibration component is removed by the profile correction part, and an inspection part configured to conduct outer appearance inspection of the inspection object, based on the three-dimensional data generated by the three-dimensional data generation part.