What is it about?
This paper presents a vision-based contact type LLD method, which adopts the hardware settings normally used in typical micromanipulation scenarios. The detection principle is based on generation of patterned ripples when the end-effector (e.g., glass micropipette), that is being vibrated, moves to get contact with the liquid surface.
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Why is it important?
Experiments revealed that the best detection accuracy was 40 nm, only limited by the micromanipulator’s positioning resolution. Moreover, the method was robust to various micromanipulation settings, such as illumination intensity, microscopy magnification, exposure time and focal plane.
Perspectives
Given its generality, this method is expected to suit for many scenarios involving liquid handling tasks in micromanipulation and industry.
Professor Wenhui Wang
Tsinghua University
Read the Original
This page is a summary of: Vision-Based 40-nm-Accuracy Liquid Level Detection Compliant With Micromanipulation, IEEE Industrial Electronics Magazine, August 2022, Institute of Electrical & Electronics Engineers (IEEE),
DOI: 10.1109/tie.2021.3108700.
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