Magnetic Coupling Pressure Sensor for Non-Penetrating Vessel Monitoring
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Solution Overview
Problem
Accessing pressure data from closed volumes, such as pressure vessels, pipes, and biologic systems without disrupting their integrity is challenging, as traditional methods like hermetic sealing with wires or optic fibers are often unacceptable or prone to failure.
Innovation Solution
A non-penetrating magnetic coupling system using an oscillating cantilever within the closed volume, where a magnetically induced communication system transmits pressure data through the vessel wall via a coil setup, allowing pressure measurement without physical connection, suitable for use in various materials including Faraday cages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If hermetic sealing with wires or optic fibers is used to access pressure data, then data access is achieved, but the integrity of the contained volume is compromised and the system is prone to failure
Solution Approach 1:
The patent replaces mechanical/wire-based data transmission with magnetic field-based communication. A magnetically coupled system uses external coils to induce currents in internal coils, transmitting pressure data through the vessel wall without physical penetration, thus maintaining volume integrity while enabling data access.
Solution Approach 2:
The patent introduces magnetic fields as an intermediary medium to transmit data through the vessel wall. The magnetic coupling system uses alternating magnetic fields generated by external coils to induce signals in internal coils, serving as a non-invasive mediator that preserves the sealed environment.
2Loss of information
If hermetic sealing with wires or optic fibers is used to access pressure data, then data access is achieved, but the system becomes complex and installation is difficult
Solution Approach 1:
The patent eliminates complex mechanical sealing and wiring by substituting with a magnetic coupling system. External coils placed against the vessel wall can communicate with internal sensors without requiring penetrations or complex hermetic seals, significantly simplifying the overall system structure.
Solution Approach 2:
The magnetic coupling system serves multiple functions: it enables data transmission, provides power transfer capability, and maintains vessel integrity simultaneously. This multi-functionality reduces the need for separate systems for each function, simplifying the overall device complexity.
3Reliability
If non-penetrating magnetic coupling is used, then the integrity of the contained volume is maintained, but data transmission capability must be established through the wall
Solution Approach 1:
The patent employs periodic alternating magnetic fields generated by external coils at specific frequencies. This periodic action enables efficient magnetic coupling through the vessel wall, allowing data transmission while maintaining the non-penetrating approach. The resonant frequency matching enhances the coupling efficiency.
Solution Approach 2:
The patent optimizes magnetic coupling by adjusting parameters such as coil geometry, winding density, and operating frequency. By changing these parameters, the system achieves effective data transmission through the vessel wall while maintaining integrity, overcoming the detection difficulty through parameter optimization.
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 robust, long-term, and potentially low-cost pressure measurement across closed volumes or barriers without penetration, maintaining the integrity of the contained environment, and is adaptable for both gas and fluid pressure sensing.
Implementation Method 1
a magnetic induction communication system having a first induction coil located inside of the vessel wall and a second induction coil located outside of the vessel wall wherein the magnetic induction communication system communicates the sensed unknown internal pressure
Implementation Method 2
The dynamics of the oscillation depend on the material around the cantilever
Data Source
AI summary
Measurement of pressure of a fluid in a vessel using a cantilever spring in the vessel; a magnet connected to the cantilever spring in the vessel; an electromagnet outside of the vessel operatively connected to the magnet and the cantilever spring in the vessel, wherein the electromagnet induces movement of the magnet and the cantilever spring in the vessel, and wherein the movement is related to the pressure of the fluid in the vessel; a receiving coil operatively positioned relative to the magnet, wherein movement of the cantilever spring and the magnet in the vessel creates an electromotive response in the coil; and a controller analyzer connected to the receiving coil, wherein the controller analyzer uses the electromotive response in the coil for measuring the pressure of the fluid in the vessel.