In-Line Tribology Tester With Integrated Optical Microscope
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Solution Overview
Problem
Existing apparatuses for tribology testing face issues with positional inaccuracy, nonrepeatability of measurement points, complex structure, and low compactness, which affect the accuracy and reliability of multiple measurements during a single test cycle.
Innovation Solution
The apparatus integrates a base with a moveable X-stage and tribology drive unit that allows for precise positioning of a sample along the X-axis, enabling repeated measurements without removal from the sample table, combined with an optical microscope and interferometer for 3D measurements, using a layered piezoelectric drive package for precise scanning movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mechanical property tester is equipped with multiple measurement units (microscope, interferometer, profilometer), then the capability for comprehensive surface analysis is improved, but the device complexity increases and positional accuracy deteriorates due to alignment difficulties
Solution Approach 1:
The patent combines multiple measurement units (optical microscope, interferometer, profilometer, scatterometer) into a single integrated measurement system that shares a common base and coordinate system. This merging approach allows comprehensive surface analysis while maintaining positional accuracy through unified mechanical support and coordinated movement of all measurement tools relative to the sample.
Solution Approach 2:
The measurement system is designed with universal functionality to perform multiple types of surface analyses (optical microscopy, interferometry, profilometry, scatterometry) using a single integrated apparatus. The system can switch between different measurement modes and tools without requiring separate devices, thereby improving versatility while controlling complexity through integrated design.
2Adaptability or versatility
If the sample is removed from the sample table for measurement, then the measurement flexibility is improved, but the time consumption increases and repeatability deteriorates
Solution Approach 1:
The patent merges the measurement system with the sample table by providing a common base that supports both the sample table and all measurement units. This integration allows the sample to remain on the sample table during measurement processes, eliminating time-consuming removal and repositioning operations while maintaining measurement flexibility through the coordinated movement of measurement tools.
Solution Approach 2:
The integrated design enables continuous measurement operations without interruption for sample removal or repositioning. The sample remains continuously positioned on the sample table while measurement units move into and out of measurement positions, ensuring uninterrupted measurement flow and improving efficiency.
3Quantity of substance
If multiple sequential measurements are performed on the same sample point, then the measurement comprehensiveness is improved, but the positional repeatability deteriorates due to drift and repositioning errors
Solution Approach 1:
The patent implements feedback mechanisms through the integrated control system that continuously monitors and tracks the positions of measurement units and sample table. The system uses position feedback to compensate for drift and ensure that multiple sequential measurements are performed at the exact same sample location, thereby maintaining high positional repeatability while gathering comprehensive measurement data.
Solution Approach 2:
The universal measurement system performs multiple types of measurements (optical, interferometric, profilometric, scatterometric) at the same sample location through coordinated operation of different measurement units. This multi-functional approach enables comprehensive data collection while maintaining positional repeatability through the unified coordinate system and controlled movement mechanisms.
4Adaptability or versatility
If the apparatus structure is expanded to include multiple measurement units, then the measurement capability is improved, but the compactness deteriorates
Solution Approach 1:
The patent employs a nested arrangement where multiple measurement units are vertically stacked or nested along the Z-axis above the sample table. The optical microscope, interferometer, profilometer, and scatterometer are positioned at different heights or within nested configurations, allowing comprehensive measurement capability while maintaining a compact footprint by utilizing vertical space rather than horizontal expansion.
Solution Approach 2:
The patent transitions from horizontal arrangement of measurement units to vertical stacking along the Z-axis. By organizing measurement tools in the vertical dimension rather than spreading them horizontally, the system achieves comprehensive measurement capability while maintaining apparatus compactness in the horizontal plane.
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 configuration ensures accurate and repeatable measurements by maintaining the sample in the same position, improving the reliability and precision of surface analysis and dynamics observation, enhancing the repeatability and accuracy of measurement results.
Implementation Method 1
layered piezoelectric drive package for precise scanning movements
Implementation Method 2
an optical microscope and interferometer for 3D measurements
Implementation Method 3
an optical microscope and interferometer for 3D measurements
Data Source
AI summary
An apparatus for in-line testing and surface analysis of a sample contains a base which stationarily supports a column and moveably supports an optical microscope, an interferometer, and at least test unit such as a scratch and abrasive wear tester that are moveable on the column in the Z-axis direction. A sample secured on a sample table, which is supported by a replaceable tribology drive unit on an X-stage that may position the sample under the microscope, interferometer, or test unit. Depending on the type of the test, the replaceable tribology unit may impart to the sample either a linear reciprocating movement or a rotating movement. The apparatus may operate in an automatic mode and is provided with a central processing unit that control movements of all moveable units through respective drivers via controllers connected to the central processing unit.