Photoelectric Microfluid Detection for Accurate Composition Sensing
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Solution Overview
Problem
Existing microfluid detection devices have relatively low accuracy in determining the composition of microfluids due to slight changes in capacitance values, which affect the reliability of the detection process.
Innovation Solution
A microfluid detection device comprising a first and second substrate with a microfluid chamber in between, equipped with photoelectric sensors and switching sub-circuits that convert optical signals into electrical signals, and a drive circuit to control hydrophobic layers for precise detection and movement of microfluids, improving sensitivity and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If capacitance-based detection method is used, then the device structure is simple, but the detection accuracy is low
Solution Approach 1:
The patent replaces the traditional capacitance-based detection method with a photoelectric detection system. Optical signals pass through the microfluid chamber and are converted to electrical signals by photoelectric sensors, substituting the mechanical/electrical capacitance measurement with an optical measurement system to achieve higher detection accuracy.
Solution Approach 2:
The patent changes the detection parameter from capacitance to optical properties (absorbance, transmittance, or fluorescence intensity). By measuring how the microfluid affects light transmission or emission, the system achieves more sensitive and accurate composition analysis compared to capacitance measurements.
2Measurement precision
If photoelectric sensors are added to improve detection accuracy, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The photoelectric detection device is designed to perform multiple detection functions using the same core components. The system can detect different microfluid compositions, concentrations, and types by analyzing optical signal variations, making the increased device complexity serve multiple purposes rather than adding unnecessary complexity.
Solution Approach 2:
The patent introduces optical signals as an intermediary between the microfluid sample and the detection system. Light acts as a mediator that interacts with the microfluid properties, allowing indirect but highly sensitive measurement of composition without requiring direct electrical contact or complex sampling mechanisms.
3Manufacturing precision
If hydrophobic layers are used to control microfluid movement, then the control precision is improved, but the device complexity increases
Solution Approach 1:
The patent employs dynamic control of hydrophobic layer properties to manage microfluid movement. By making the hydrophobic characteristics adjustable or controllable, the system can dynamically direct fluid flow, hold fluid at specific positions, or change flow patterns as needed, achieving precise positioning without mechanical actuators.
Solution Approach 2:
The hydrophobic layers are designed to automatically control microfluid movement based on their inherent surface properties. The structure itself performs the control function through capillary action and surface tension effects, eliminating the need for external mechanical control systems and reducing overall device complexity while maintaining precision.
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 device enhances the accuracy of microfluid composition detection by utilizing photoelectric sensors and switching sub-circuits to convert optical signals into electrical signals, allowing for precise determination of microfluid composition and movement within the microfluid chamber, thereby improving detection sensitivity and reliability.
Implementation Method 1
each of the photoelectric sensors is configured to convert an optical signal passing through the second substrate and the microfluid chamber to an electrical signal
Implementation Method 2
the target hydrophobic layer is configured to change in hydrophobicity under the action of the electric field, to drive microfluid to move within the microfluid chamber
Data Source
AI summary
Disclosed are a microfluid detection device, system and method, a processing device and a storage medium, in the field of biochemistry. The device includes a first substrate and a second substrate facing each other, and a microfluid chamber between the first substrate and the second substrate; wherein the first substrate has a plurality of photoelectric sensors and an output circuit, each of the photoelectric sensors is configured to convert an optical signal passing through the second substrate and the microfluid chamber to an electrical signal, and the output circuit is configured to output the electrical signal obtained by the photoelectric sensor.