Automated Analyzer Rod Lifting Control for Liquid Droplet Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing automated analyzers face accuracy issues due to excessive liquid droplets adhering to the tip of rod-like members during lifting and lowering operations, leading to contamination and uneven liquid dispensing, which affects analysis precision.
Innovation Solution
Implementing a control mechanism that controls the lifting and lowering of rod-like members to stop their upward motion briefly after reaching a specific position, allowing liquid droplets to settle and reducing adherence, thereby minimizing contamination and ensuring accurate dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the rod-like member is rapidly lifted and lowered during dispensing operations, then the operation speed is improved, but liquid droplets adhere to the tip portion causing contamination and analysis errors
Solution Approach 1:
The patent applies periodic action by implementing a multi-stage lifting motion with distinct phases: rapid initial lift, intermediate pause, and final lift. This periodic motion pattern allows liquid droplets to settle during the pause phase while maintaining overall operational efficiency, directly resolving the contradiction between speed and droplet adhesion
Solution Approach 2:
The patent applies preliminary action by performing a preliminary rapid lift to extract the rod-like member from the liquid, followed by an intermediate pause to allow droplet settlement before the final lift. This preliminary extraction action separates the droplet reduction function from the main lifting function, effectively reducing adhesion while maintaining speed
2Productivity
If the probe is continuously moved without pausing, then productivity is improved, but liquid droplets scatter and contaminate machinery
Solution Approach 1:
The patent introduces periodic pauses during the lifting cycle where the rod-like member is temporarily held at intermediate positions. These periodic stoppages allow liquid droplets to settle back into the liquid source or container, preventing scattering and contamination while maintaining overall productivity through efficient motion planning
Solution Approach 2:
The patent converts the harmful effect of liquid adhesion into a beneficial settling process by utilizing the pause phase. During this intermediate holding period, gravity and surface tension naturally cause droplets to detach and return to the liquid source, transforming what would be contamination into a self-cleaning mechanism
3Loss of time
If the rod-like member is lifted quickly from the liquid, then operation time is reduced, but excessive liquid droplets adhere to the tip
Solution Approach 1:
The patent implements periodic action with a multi-phase lifting sequence: rapid initial lift to extract the member, intermediate pause to allow droplet settlement, and final lift to complete the operation. This timed periodic motion reduces droplet adhesion while maintaining acceptable operation speed, resolving the contradiction between time loss and dispensing precision
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the lifting speed and pause duration based on the liquid properties and operational requirements. The control mechanism modifies motion parameters to optimize the balance between operation speed and droplet reduction, achieving both time efficiency and dispensing accuracy
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 approach effectively reduces liquid droplets on the rod-like members, enhancing analytical accuracy and preventing contamination within the automated analyzer.
Implementation Method 1
at a time when at least the rod-like member reaches a second position where the tip portion is not separated from the liquid, an upward motion of the rod-like member is stopped for a given period of time
Data Source
AI summary
An automated analyzer includes a rod-like member 12a, a driving portion 12c, and a control mechanism 30. The driving portion 12c lifts and lowers the rod-like member 12a a direction of being inserted into and removed from the container 24. The control mechanism 30 controls the driving portion 12c so that the rod-like member 12a is lifted after being lowered so that a tip portion of the rod-like member 12a reaches a first position in the liquid L, and at a time when the rod-like member 12a reaches a second position where the tip portion is not separated from the liquid, an upward motion of the rod-like member 12a is stopped for a given period of time to reduce liquid film adhering to the rod-like member.