Electromagnetic Bubble Detection in Analytical Fluid Paths
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Solution Overview
Problem
Existing analytical devices, particularly HPLC systems, face challenges in accurately detecting and removing gas bubbles in fluid paths, which can distort measurements and potentially damage instruments, with conventional methods being inefficient and requiring additional equipment.
Innovation Solution
A method and device utilizing an electromagnetic signal detector to identify gas bubbles by responding to a pressure signal, determining bubble presence through contraction and expansion, and employing existing components like pumps and detectors for efficient detection and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bubble detection methods are used, then measurement accuracy can be maintained, but additional equipment and complexity are required
Solution Approach 1:
The patent applies multi-functionality by enabling the existing pump and detector to serve dual purposes: the pump provides both mobile phase delivery and pressure modulation for bubble detection, while the detector performs both analytical measurement and bubble detection. This eliminates the need for separate bubble detection equipment, resolving the contradiction between maintaining measurement accuracy and reducing device complexity
Solution Approach 2:
The system performs self-diagnosis by using its own operational components (pump and detector) to detect bubbles in the fluid path. The pump's pressure variations and the detector's signal changes are utilized to identify bubble presence, allowing the system to monitor itself without external assistance, thereby avoiding additional equipment while maintaining reliability
2Difficulty of detecting and measuring
If additional bubble detection equipment is added, then bubble detection capability is improved, but device complexity and cost increase
Solution Approach 1:
The existing pump and detector are transformed into multi-functional components that simultaneously perform their original functions and bubble detection. The pump provides pressure modulation for bubble detection while delivering mobile phase, and the detector analyzes both sample compounds and bubble presence, eliminating the need for separate detection hardware and reducing overall device complexity
Solution Approach 2:
The patent uses the fluid flow and pressure variations as intermediaries to transfer bubble presence information to the detector. The pressure signal acts as a mediator that carries bubble detection information, allowing the detector to indirectly sense bubble presence through changes in flow characteristics without requiring direct physical contact or specialized sensors
3Reliability
If bubble detection is performed continuously, then measurement reliability is improved, but energy consumption increases
Solution Approach 1:
The system maintains continuous bubble detection by leveraging the ongoing pump operation and fluid flow. Since the pump is already running to deliver mobile phase, the pressure variations and detector signals continue uninterrupted, enabling continuous monitoring without requiring additional energy input or separate detection cycles, thus maintaining reliability without significant energy penalty
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 reliable and cost-effective bubble detection and removal in HPLC systems, enhancing measurement accuracy and instrument longevity without additional hardware, using existing devices and software.
Implementation Method 1
detecting in the fluid path an electromagnetic signal in response to a provided flow/pressure signal
Implementation Method 2
determining the presence of the bubble in the fluid path based on the detected electromagnetic signal... because the bubble responds with a contraction and expansion to the pressure signal
Data Source
AI summary
In an analytical device, a bubble, in particular a gas bubble, is detected by detecting in a fluid path an electromagnetic signal in response to a provided flow/pressure signal, and determining the presence of the bubble in the fluid path based on the detected electromagnetic signal.