Optical Flow Metering via Difference Image Analysis
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Solution Overview
Problem
Current fluid flow monitoring and regulation systems in medical settings, such as intravenous infusion therapy, often rely on manual methods or infusion pumps, which may not be suitable for all environments or require strict adherence to set flow rates, lacking precision and flexibility.
Innovation Solution
A system comprising a flow meter with optical sensors to monitor fluid flow in a drip chamber, coupled with a valve that can be remotely controlled, allowing for real-time adjustments and feedback to maintain precise flow rates, and an apparatus with deformable support members to regulate fluid flow, enabling closed-loop or open-loop configurations for monitoring and controlling fluid delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual methods or infusion pumps are used for fluid flow monitoring, then the system is simple to operate, but measurement precision and flexibility are insufficient
Solution Approach 1:
The patent replaces manual mechanical flow monitoring methods with an optical sensing system that uses light absorption characteristics to detect fluid flow rates. The optical sensor system substitutes mechanical measurement mechanisms, providing automated, precise flow monitoring without requiring manual intervention or complex mechanical pump systems.
Solution Approach 2:
The patent introduces an optical sensor as an intermediary element between the fluid and the measurement system. The sensor detects fluid flow by measuring light absorption properties of the fluid, serving as a mediator that translates physical fluid flow into measurable optical signals without direct mechanical contact.
2Reliability
If strict adherence to set flow rates is required, then reliability is improved, but adaptability to different environments and conditions deteriorates
Solution Approach 1:
The patent implements a feedback control system where optical sensors continuously monitor actual fluid flow rates and provide real-time data to a control mechanism. This feedback loop enables the system to automatically adjust flow rates to maintain precision while adapting to varying environmental conditions, patient needs, or fluid properties without compromising reliability.
Solution Approach 2:
The patent employs dynamic flow control capabilities that allow the system to adjust flow rates in real-time based on detected conditions. The valve mechanism can dynamically modify flow characteristics, enabling the system to maintain reliable control while adapting to different environments, fluid viscosities, or clinical requirements.
3Measurement precision
If optical sensors are used to monitor fluid flow, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent designs the optical sensor system to serve multiple functions: it not only measures flow rate but also detects fluid presence, monitors flow direction, and can identify different fluid types based on optical properties. This multi-functionality reduces the need for separate sensors for each measurement task, thereby limiting the increase in overall device complexity while maintaining high measurement precision.
4Ease of operation
If remote control capability is added to the valve, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent implements a control system where the valve can automatically adjust flow rates based on feedback from optical sensors without requiring manual intervention. The system serves itself by using the sensor data to trigger automatic valve adjustments, maintaining ease of operation while minimizing the complexity of remote control mechanisms through automated decision-making algorithms.
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 system provides accurate and flexible monitoring and regulation of fluid flow, preventing free flow conditions and ensuring flow rates remain within predetermined ranges, enhancing the reliability and precision of fluid delivery in medical applications.
Implementation Method 1
one or more optical sensors to monitor the flow of fluid within a tube
Data Source
AI summary
A flow meter includes an image sensor, a coupler, a support member and one or more processors. The coupler is adapted to couple to a drip chamber. The support member is operatively coupled to the coupler. The image sensor has a field of view and is operatively coupled to the support member. The image sensor is positioned to view the drip chamber within the field of view. The processor receives data from the image sensor and is configured to: receive a first image from the image sensor, compare the first image to a second image, and generate a difference image based upon the comparison between the first and second images.