Linear-Motor Microdosing Valve for Precise Repeatable Fluid Dosing

The patent replaces traditional mechanical actuation systems with a piezoelectric actuator that directly controls the diaphragm. The piezoelectric material converts electrical signals into precise mechanical displacement, enabling microdosing precision of hundreds of micrometres without complex mechanical linkages. This substitution of mechanical control with piezoelectric actuation resolves the contradiction by achieving high precision through a more compact, integrated structure.

The patent employs a piezoelectric actuator that allows dynamic adjustment of dosing parameters including stroke length, force, and timing through electrical control. By changing electrical input parameters rather than mechanical configurations, the system achieves high dosing precision and repeatability while maintaining structural simplicity. The piezoelectric element's ability to respond precisely to voltage changes enables fine-tuned control without additional mechanical complexity.

The patent eliminates traditional mechanical actuation components such as motors, gears, and linkages that are subject to wear. The piezoelectric actuator has no moving parts that contact each other under load, replacing mechanical-to-mechanical actuation with electro-mechanical conversion. This substitution dramatically reduces component wear and enables sustained operation at hundreds of cycles per minute without degradation, resolving the contradiction between productivity and reliability.

The piezoelectric actuator inherently maintains its performance characteristics over time without requiring mechanical adjustment or lubrication. The solid-state nature of piezoelectric materials means they do not suffer from friction, wear, or loosening that plagues mechanical systems. This self-maintaining property allows continuous operation with minimal intervention, achieving both high productivity and long-term reliability.

The patent incorporates a controller that receives feedback from sensors monitoring the actual dosing performance and automatically adjusts the piezoelectric actuator parameters. This closed-loop control system eliminates the need for manual initial adjustment by automatically calibrating the valve to achieve precise correspondence between actuator movement and liquid dosage. The feedback mechanism resolves the contradiction by maintaining ease of operation while eliminating time-consuming manual setup.

The controller with automatic adjustment capability allows the valve to self-calibrate without requiring operator intervention. The system autonomously verifies and corrects the relationship between diaphragm displacement and dosed volume, eliminating the manual adjustment step entirely. This self-service feature maintains operational simplicity while removing the time loss associated with initial setup and verification.