Sample Holder Dimensional Compensation via Sensor Feedback
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Solution Overview
Problem
The precision required for automated sample container selection in storage and retrieval systems is compromised by dimensional variations in sample group holders due to temperature changes, material stresses, and misalignment, making it difficult to accurately locate and retrieve samples.
Innovation Solution
The implementation of sensors on the pick head or storage and retrieval system to measure actual dimensions and positions of sample group holders, adjusting the expected locations of samples to match their actual positions, and using this data to calculate and adjust the spacing and location of the pick head for precise tube selection and placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If automated sample container selection is performed without compensation, then the system operation is simple, but the positioning precision deteriorates due to dimensional variations in sample group holders
Solution Approach 1:
The system performs preliminary measurement of the sample group holder's actual position and dimensions using sensors before the picking operation. This advance measurement allows the controller to calculate compensation values and adjust the pick head positioning in advance, ensuring precise sample retrieval despite thermal expansion or contraction of the holder.
Solution Approach 2:
The system uses sensors to detect the actual position and dimensional characteristics of the sample group holder, then feeds this information back to the controller. The controller processes this feedback data and adjusts the pick head positioning accordingly, creating a closed-loop control system that maintains precision despite environmental variations.
2Measurement precision
If sensors are added to measure and compensate for dimensional variations, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The system replaces complex mechanical adjustment mechanisms with a sensor-based measurement and software-based compensation approach. Instead of using精密 mechanical positioning systems that must physically adapt to dimensional variations, the invention uses sensors to measure variations and calculates compensation through the controller, substituting mechanical complexity with sensing and computational simplicity.
3Manufacturing precision
If the pick head position is adjusted based on measured dimensional changes, then sample retrieval accuracy is improved, but operation time increases
Solution Approach 1:
The system performs the measurement and calculation of compensation values as a preliminary step before the actual picking operation. By measuring the sample group holder's position and dimensions in advance and pre-calculating the necessary adjustments, the system minimizes the time required during the actual sample retrieval, as the compensation values are ready for immediate application.
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 ensures accurate and efficient retrieval and placement of sample containers, even in extreme temperature environments like -80°C, by compensating for dimensional changes, thereby enhancing the system's adaptability and precision.
Implementation Method 1
dimensional variations in sample group holders due to temperature changes
Implementation Method 2
dimensional variations in sample group holders due to temperature changes
Data Source
Figure 1a~1b
Figure 2a
Figure 2b
AI summary
In accordance with one or more aspects of the disclosed embodiment an apparatus is provided. The apparatus includes a pick head configured to transfer sample containers to and from a sample group holder, at least one sensor connected to the pick head and configured to detect at least one predetermined feature of the sample group holder, and a controller configured to receive a detection signal from the at least one sensor corresponding to detection of the at least one predetermined feature, determine a change in a predetermined characteristic of the sample group holder based on a detected position of the at least one predetermined feature, and determine a location of one or more samples in the sample group holder to allow for the transfer of the one or more sample containers to and from the sample group holder based on the edge detection signal.