Multi-Fluidic Cartridge Reader with Eccentric Cam Actuation
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Solution Overview
Problem
Current handheld diagnostic devices for biological samples are limited by the need for complex and elaborate sensor and computational electronics, as well as mechanical actuation elements, which are not adequately advanced to handle multi-fluidic cartridges with multiple actuation points, restricting their ability to perform sophisticated tests at the point of care.
Innovation Solution
A reader device with multiple plungers and eccentric cams on a camshaft, coupled with clutches and motorized actuators, allows for independent actuation of multiple fluidic pouches in a multi-fluidic cartridge, enabling controlled release of fluids and improved sample analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple plungers and eccentric cams are added to enable independent actuation of multiple fluidic pouches, then the ability to manipulate multi-fluidic cartridges is improved, but the device complexity increases
Solution Approach 1:
The actuation mechanism is segmented into multiple independent plungers (first plunger, second plunger, etc.), each with its own yoke and eccentric cam relationship. This allows each fluidic pouch to be actuated independently while maintaining overall system coordination through the shared camshaft architecture.
Solution Approach 2:
The camshaft serves as a universal component that coordinates multiple plungers through different eccentric cams. This single rotational element provides multi-functional control over several fluidic pouches, reducing the need for completely separate actuation mechanisms for each pouch.
2Manufacturing precision
If clutches are added to control the engagement of eccentric cams with the camshaft, then the precision of fluid release timing is improved, but the device complexity increases
Solution Approach 1:
The clutch mechanisms provide feedback-controlled engagement with the camshaft, allowing precise timing of fluid release based on the rotational position of the camshaft. This ensures that each fluidic pouch is actuated at the correct moment in the testing sequence.
Solution Approach 2:
The clutches are positioned and configured to engage the camshaft at predetermined points in the rotation cycle, preparing the system for precise fluid release timing before the actual actuation occurs. This preliminary positioning ensures accurate synchronization.
3Stability of the object's composition
If multiple eccentric cams are disposed on a common camshaft, then the coordination of multiple plungers is improved, but the device complexity increases
Solution Approach 1:
Multiple eccentric cams are merged onto a single camshaft, combining their functions into one coordinated rotational element. This merging provides stable coordination between multiple plungers while avoiding the complexity of multiple independent shafts or mechanisms.
Solution Approach 2:
The coordination problem is solved by transitioning from linear or independent control dimensions to a rotational dimension. The camshaft's rotation provides a unified temporal reference that synchronizes all plungers through the eccentric cam profiles, stabilizing their coordinated action.
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
Enables the manipulation of multi-fluidic cartridges with increased complexity, allowing for more advanced testing procedures and improved diagnostic capabilities at the point of care, enhancing the accuracy and efficiency of blood testing and other biological analyses.
Implementation Method 1
a first eccentric cam disposed on a camshaft and rotatably mated with the first yoke; a second eccentric cam disposed on said camshaft and rotatably mated with the second yoke
Implementation Method 2
a first clutch disposed on said camshaft and coupled to said first eccentric cam; and a second clutch disposed on said camshaft and coupled to said second eccentric cam, wherein said first clutch engages said camshaft with a first direction of rotation of said camshaft and said second clutch engages said camshaft with a second direction of rotation opposite the first direction
Data Source
AI summary
A reader for mechanical actuation of fluids within a test cartridge. The instrument interface including multiple independently-controlled plungers aligned to respective fluidic pouches on a test cartridge that is inserted into a testing apparatus embodying the instrument interface. The plungers include tips for applying mechanical force to the respective fluidic pouches.