Microfluidic Device With Multi-Mode Vibration Microtube

The microtube is divided into multiple arms (first arm, second arm, third arm, fourth arm) that can vibrate independently or in combination. Each arm contains microchannel portions that can be selectively activated, allowing the system to segment the vibration function across multiple structural elements to achieve multiple vibration modes without requiring a completely complex redesign of the entire tube structure.

The microtube structure is designed to be dynamically configurable through selective activation of different arm combinations. The system can transition between different vibration modes (e.g., single-arm vibration, paired-arm vibration, all-arm vibration) by controlling which arms are active, making the structure adaptable rather than fixed, thereby improving measurement precision without permanently increasing structural complexity.

The microtube structure serves multiple functions simultaneously: it acts as both the fluid conduit and the vibration-based sensing element. The same structural arms that guide the fluid also serve as the vibrating elements for detection. This multi-functionality allows the system to achieve amplified sensor output through multiple vibration modes without adding separate dedicated sensing components, thereby limiting the increase in overall device complexity.

The patent combines the fluid flow path and vibration generation/detection functions into a single integrated microtube structure. The microchannel portions are merged with the vibrating arms, so that the fluid flow and vibration occur within the same structural elements. This merging allows multiple vibration modes to be achieved through structural configuration rather than adding separate vibration mechanisms, thus amplifying sensor output while minimizing additional complexity.

While the overall microtube structure exhibits axial symmetry with four arms arranged circumferentially, the patent introduces controlled asymmetries in the microchannel portions within each arm. The microchannel portions can have different configurations (e.g., different positions, orientations, or cross-sections) within the symmetric framework. This allows the system to maintain the pressure-drop benefits of axial symmetry while incorporating localized asymmetric features that can be optimized for manufacturing and performance.

The patent applies different local qualities to different portions of the microtube. While the overall tube structure maintains axial symmetry for pressure reduction, the microchannel portions within each arm can be locally optimized for specific functions (e.g., flow distribution, vibration characteristics, or manufacturing ease). This local differentiation allows the system to achieve low pressure drop through overall symmetry while reducing manufacturing precision requirements by allowing variability in local features that are less critical to the overall pressure characteristics.