Peristaltic Pump Roller Bed Profile for Triboelectric Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional peristaltic pumps generate electrical noise due to triboelectric effects, which interfere with intracardiac ECG signals during medical procedures, as the fluid and pump components create unwanted electrical charges and currents.
Innovation Solution
The pump design enhances friction between the tube and the roller bed by using a roller bed with a predetermined profile featuring an arc segment and side segments with lesser curvature, along with a groove and controlled friction surface to minimize concussive forces and triboelectric charge generation, ensuring consistent contact and reduced noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional peristaltic pump rollers compress the tube to create sealing pressure, then fluid pumping function is achieved, but triboelectric charges are generated causing electrical noise
Solution Approach 1:
The patent applies anti-static coatings to the roller surfaces and tube materials to convert the harmful triboelectric effect into a beneficial anti-static property. This coating treatment reduces the generation of static electricity during roller-tube contact while maintaining the necessary compression and sealing functions for fluid pumping.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the roller and tube materials by selecting specific materials with different friction coefficients and electrical properties. These parameter changes optimize the balance between maintaining adequate sealing pressure for pumping and minimizing triboelectric charge generation.
2Productivity
If the tube is repeatedly compressed and released during pumping, then fluid flow is achieved, but sudden movements cause triboelectric charge accumulation
Solution Approach 1:
The patent applies anti-static treatments and selects materials with optimized electrical properties before the pumping operation begins. This preliminary preparation prevents charge accumulation by reducing the triboelectric effect at the source, allowing repeated compression cycles to proceed without significant charge buildup.
Solution Approach 2:
The patent converts the harmful repeated compression-induced charge generation into a beneficial controlled process by using materials and surface treatments that minimize triboelectric effects while maintaining the necessary mechanical compression for fluid flow.
3Reliability
If friction between tube and roller bed is increased to maintain contact, then consistent compression is achieved, but triboelectric effects are enhanced
Solution Approach 1:
The patent changes the friction and electrical parameters of the roller bed and tube interface by selecting materials with specific friction coefficients and electrical properties. This optimization allows sufficient friction for consistent contact and compression while minimizing the triboelectric effect through material selection and surface treatment.
Solution Approach 2:
The patent converts the potentially harmful high-friction triboelectric effect into a beneficial controlled interaction by using anti-static coatings and material selections that maintain necessary friction for reliable contact while reducing charge generation.
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
This design minimizes the generation and accumulation of triboelectric charges, reducing electrical noise and improving the clarity of ECG signals by maintaining consistent contact and reducing sudden movements of the tube, thereby enhancing the accuracy of medical procedures.
Implementation Method 1
The pump design enhances friction between the tube and the roller bed by using a roller bed with a predetermined profile featuring an arc segment and side segments with lesser curvature, along with a groove and controlled friction surface
Implementation Method 2
Conventional peristaltic pumps generate electrical noise due to triboelectric effects, which interfere with intracardiac ECG signals during medical procedures, as the fluid and pump components create unwanted electrical charges and currents
Data Source
AI summary
A pump for use with a tube, having a rotor having an axis of rotation and a plurality of rollers configured to define an orbital path about the axis of rotation, the orbital path defined by a radius, and a roller bed having a surface adapted to support the tube for peristaltic compression by one or more rollers, wherein the surface has a predetermined profile comprising a circular arc segment and at least one side segment, the arc segment having a first curvature defined by the radius, and the at least one side segment having a second curvature lesser than the first curvature.