Inner Surface Inspection Apparatus with Movable Mirror
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Solution Overview
Problem
Existing inner surface image inspection apparatuses are limited in their ability to adapt to cylindrical members with varying internal diameters, as they require multiple setups or fixed optical systems with variable working distances, leading to inefficiencies in inspecting surfaces with different dimensions.
Innovation Solution
An inner surface image inspection apparatus featuring a lens-barrel with a telecentric optical system, a beam splitter, a cylindrical insert unit with a linearly movable mirror, and a distance sensor, allowing for adjustment of the working distance to match the reference distance by moving the mirror along the optical axis, enabling flexible inspection of cylindrical members with diverse internal diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed optical system with a determined working distance is used, then the optical system maintains stable imaging performance, but it cannot adapt to cylindrical members with different internal diameters
Solution Approach 1:
The patent applies the dynamics principle by making the mirror movable along the optical axis through a linear motion mechanism. This allows the working distance to be dynamically adjusted according to different internal diameters of cylindrical members, transforming a static optical system into a dynamic one that can adapt to various inspection scenarios while maintaining stable imaging performance through controlled movement.
2Manufacturing precision
If multiple types of inner surface image inspection apparatus with different working distances are provided, then each apparatus can be optimized for specific internal diameters, but the device complexity and setup requirements increase
Solution Approach 1:
The patent implements universality by designing a single inspection apparatus that can handle multiple internal diameters through the adjustable mirror position. Instead of requiring separate apparatuses for different diameter ranges, this universal design allows one system to perform multiple inspection functions by simply adjusting the mirror's position along the optical axis, thereby reducing device complexity and setup requirements.
3Device complexity
If the working distance is fixed, then the optical system structure remains simple, but inspection of cylindrical members with varying internal diameters becomes inefficient
Solution Approach 1:
The linear motion mechanism enables dynamic adjustment of the mirror position, allowing the system to quickly adapt to different internal diameters without requiring complex optical redesign. This dynamic capability significantly improves inspection efficiency for various diameters while adding only minimal structural complexity through the straightforward linear motion assembly.
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
This solution allows for accurate and flexible inspection of inner surfaces across various cylindrical members with different diameters, eliminating out-of-focus issues by dynamically adjusting the working distance, thereby ensuring consistent image quality and surface property assessment.
Implementation Method 1
a beam splitter that reflects an illumination light from the light source unit in a direction parallel to an optical axis of the optical system
Implementation Method 2
a mirror disposed in the insert unit in such a manner that a reflecting surface of the mirror is inclined relative to the optical axis of the optical system
Data Source
AI summary
An inner surface image inspection apparatus includes: an image-capturing unit; a lens-barrel attached in front of the image-capturing unit, the lens-barrel containing lenses; an insert unit of a cylindrical shape attached to a leading end of the lens-barrel, the insert unit adapted to be inserted into the hole of the inspection object; a mirror disposed in the insert unit in such a manner that a reflecting surface of the mirror is inclined relative to the optical axis of the lenses of the optical system; and a linear motion mechanism configured to move the mirror in parallel to the optical axis.