Hall Effect Sensor Probe for Collision Detection
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Solution Overview
Problem
Existing sample probe systems in high-throughput flow cytometry and batch processing require separate manipulation and handling for each sample, leading to increased risk of damage and inefficiencies, particularly due to extended probe lengths.
Innovation Solution
A sampling probe with a built-in obstacle detection mechanism using a magnet-based restorative spring and Hall effect sensor to minimize damage and improve positioning accuracy, allowing for automatic retraction upon contact with objects and calibration in three-dimensional space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate manipulation and handling of each sample is performed, then sample processing can be completed, but instrument downtime increases and productivity decreases
Solution Approach 1:
The patent combines multiple sample handling operations into a single automated probe system. The probe integrates sample aspiration, transfer, and dispensing functions, allowing continuous processing of multiple samples without manual intervention between operations, thereby reducing instrument downtime and increasing throughput
Solution Approach 2:
The probe system performs self-calibration and self-positioning using integrated sensors and feedback mechanisms. The obstacle detection mechanism automatically identifies and compensates for positional deviations, eliminating the need for manual calibration between samples and maintaining continuous operational efficiency
2Length of moving object
If extended sample drawing probes are used, then sampling capability is improved, but the risk of probe damage increases
Solution Approach 1:
The system performs preliminary obstacle detection using integrated sensors before the probe tip makes contact with sample vessels or other objects. The magnetic sensors detect changes in magnetic field caused by ferromagnetic materials in the path, allowing the system to retract or adjust the probe position in advance, preventing collisions and damage to the extended probe
Solution Approach 2:
The probe incorporates real-time feedback mechanisms including magnetic sensors that continuously monitor the environment ahead of the probe tip. When an obstacle is detected through changes in magnetic field strength, the system immediately adjusts probe positioning, creating a closed-loop control system that protects the extended probe from damage while maintaining sampling capability
3Measurement precision
If probe position accuracy is improved, then sampling precision increases, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical positioning and detection systems with magnetic field-based sensing. Instead of using mechanical encoders, optical sensors, or physical contact switches to detect probe position and obstacles, the system uses magnetic sensors that detect changes in magnetic field strength, providing accurate position feedback through a simpler, more reliable magnetic field interaction mechanism
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
The solution reduces instrument downtime, increases probe durability, and enhances accuracy by automatically detecting collisions and calibrating the probe's position, thereby improving the efficiency and reliability of sample handling.
Implementation Method 1
A Hall effect sensor may be positioned within the housing and the magnets may be positioned on the probe such that movement of the probe causes a change in a magnetic field between the magnets and the Hall effect sensor
Implementation Method 2
a magnet-based probe with opposing magnets that provide force to push the probe back to a normal state after it has been depressed in contact with another object
Data Source
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AI summary
A sampling system is provided. The sampling system includes a housing. Mounted to the housing is a Hall effect sensor. A probe configured to contact a sample is inserted into the housing. The probe includes an elongated portion and a restorative spring inserted onto the elongated portion of the probe. The restorative spring provides sufficient restorative force to return the probe to a relaxed position. The Hall effect sensor is configured to sense a field strength generated by the proximity of the restorative spring of the probe in the extended position.