Dual-Sensor Valve Control for Precise Fluid Dosing
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Solution Overview
Problem
Syringe pumps face challenges with variable response times, unknown flow rates during transient periods, and difficulties in fine-tuning fluid delivery.
Innovation Solution
A device comprising a first valve with a selectively openable inlet and outlet, and two sensors that communicate with a controller to control the flow of fluid, ensuring precise delivery by maintaining a consistent flow rate even under changing fluidic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If syringe pumps are used to deliver fluid, then fluid delivery capability is provided, but response time varies from seconds to hours and flow rate cannot be known during transient period
Solution Approach 1:
The patent implements feedback control by using sensors to detect fluid presence and generate signals that are fed back to the controller. The controller adjusts valve operation based on these feedback signals to maintain precise flow control and reduce response time variability.
Solution Approach 2:
The patent replaces traditional mechanical flow measurement methods with electronic sensing and control systems. Sensors detect fluid presence and control systems regulate flow electronically, enabling precise flow rate measurement and faster response times compared to mechanical syringe pumps.
2Manufacturing precision
If syringe pumps operate to regulate fluid delivery, then fluid delivery control is achieved, but fine-tuning difficulties arise
Solution Approach 1:
The patent employs dynamic control where the controller can adjust valve opening/closing timing and duration in real-time based on sensor feedback. This dynamic adjustment capability enables fine-tuning of fluid delivery precision without complex mechanical adjustments, improving both precision and ease of operation.
Solution Approach 2:
The patent achieves fine-tuning by changing operational parameters such as valve actuation timing, pulse duration, and frequency through the control system. These parameter adjustments allow precise control of fluid delivery without mechanical fine-tuning, making the system easier to operate while maintaining high precision.
3Manufacturing precision
If a valve system with sensors and controller is implemented, then flow rate control precision is improved, but device complexity increases
Solution Approach 1:
The patent designs the controller to perform multiple functions: sensing fluid presence, processing sensor signals, controlling valve actuation, and monitoring flow rates. This multi-functionality reduces the need for separate dedicated components, achieving high flow rate control precision while managing device complexity through integrated design.
Data Source
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AI summary
A device for controlling flow of a fluid, comprising: a first valve comprising: a selectively openable inlet; an opening; a selectively openable outlet, arranged such that fluid may enter the first valve through the inlet, exit the first valve through the opening, enter the first valve through the opening and exit the first valve through the outlet; a first sensor for detecting a fluid; a second sensor for detecting a fluid, the first sensor and second sensor in fluid communication with the first valve via the opening; a controller for receiving signals from the first sensor and second sensor and for controlling opening and closing of the inlet and outlet in response to receiving said signals, arranged to allow, in use, a fluid to flow through the device by flowing: - into the first valve through the inlet of the first valve; - out of the first valve through the opening of the first valve; - past the first sensor for detecting a fluid; - to the second sensor for detecting a fluid; - into the first valve through the opening of the first valve; - out of the first valve through the outlet of the first valve