Microparticle Separation via Dynamic Pressure Control
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Solution Overview
Problem
In microparticle separation methods, the application of constant voltage leads to delayed liquid flow and limitations in the number of actuator drives, causing disturbances in the flow of microparticles and sheath flow, and accumulated liquid in the separation region, which necessitates efficient control for separation and discharge.
Innovation Solution
A microparticle separation method using a microparticle separation microchip with a main flow path and a pressure chamber, where negative pressure is generated to separate microparticles and positive pressure is applied to discharge liquid, with pressure control based on the time interval of microparticle detection, using dynamic changes in pressure to optimize the separation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constant voltage is applied to the actuator during microparticle separation, then the microparticles can be separated, but the liquid flow becomes delayed and extra drive voltage is required causing limitations on the number of available multistep drives
Solution Approach 1:
The patent applies dynamics by transitioning from constant voltage to dynamic voltage control. The actuator voltage is adjusted in real-time based on the separation process state, reducing voltage during liquid flow and increasing it only when microparticles need separation. This dynamic adjustment eliminates the need for extra drive voltage and extends actuator durability while maintaining separation productivity.
Solution Approach 2:
The patent changes the voltage parameter dynamically during the separation process. By monitoring liquid flow state and microparticle position, the system adjusts the actuator voltage parameter - reducing it during liquid flow to avoid delays and increasing it only when necessary for particle separation. This parameter optimization resolves the contradiction between separation speed and actuator durability.
2Productivity
If constant voltage is applied to the actuator during microparticle separation, then separation can occur, but disturbance remains in the flow of microparticles or the sheath flow
Solution Approach 1:
The system dynamically adjusts actuator voltage based on real-time detection of microparticle position and liquid flow state. When microparticles are present and need separation, voltage increases; when liquid flows normally, voltage reduces. This dynamic control stabilizes the flow by preventing unnecessary disturbances while maintaining separation capability, resolving the contradiction between productivity and flow stability.
Solution Approach 2:
The patent implements feedback control by detecting microparticle position and liquid flow state, then using this information to adjust actuator voltage in real-time. The detection system provides continuous feedback about the separation process state, allowing the control system to optimize voltage application and maintain stable flow conditions while achieving effective microparticle separation.
3Productivity
If microparticle separation continues, then more microparticles can be separated, but liquid accumulates in the separation region requiring discharge
Solution Approach 1:
The system dynamically switches between separation mode and discharge mode based on the accumulation state in the separation region. By detecting liquid accumulation levels and microparticle separation progress, the system adjusts actuator voltage and flow control to either continue separation or initiate liquid discharge. This dynamic switching enables high throughput while preventing excessive liquid accumulation that would require discharge interruptions.
Solution Approach 2:
The patent maintains continuous useful action by seamlessly transitioning between microparticle separation and liquid discharge operations. The system continuously monitors separation progress and liquid accumulation, ensuring that discharge operations are performed only when necessary and do not interrupt the overall separation process. This continuous operation maximizes throughput while managing liquid accumulation in the separation region.
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 allows for the separation of microparticles with lower voltage, efficient discharge of accumulated liquid, and improved recovery rates with high purity and efficiency.
Implementation Method 1
generating negative pressure in the pressure chamber communicating with the main flow path to separate and fetch the microparticle in liquid flowing in the main flow path into the pressure chamber
Implementation Method 2
generating positive pressure equal to or lower than a total absolute value of the negative pressure generated in the pressure chamber to discharge the liquid from the pressure chamber to the main flow path
Data Source
AI summary
A method of extracting microparticles by detecting target microparticles for extraction in a main flow path which communicates with a pressure chamber, generating for each of the detected target microparticles a change in a negative pressure in the pressure chamber communicating with the main flow path to separate and extract each of the detected target microparticles flowing in the main flow path into the pressure chamber, wherein generating the change of the negative pressure to extract the detected target microparticles comprises generating a negative change in pressure by a different amount in accordance with a separation between the detected target microparticles.