Invasive Multi-Electrode Electrochemical Sensor with Spiral Wire Geometry
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Solution Overview
Problem
Existing electrochemical sensors are non-invasive and lack the capability for continuous monitoring of biological/physiological parameters, and they are also costly.
Innovation Solution
A low-cost invasive multi-electrode electrochemical sensor with wire electrodes and gold fingers, where the invasion sections are spirally wound and connected to a cover plate, allowing for adaptable detection geometries and improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing electrochemical test strips are used for fluid detection, then the detection can be performed with simple structure, but they cannot be used for invasive detection and continuous monitoring of biological parameters
Solution Approach 1:
The sensor is divided into distinct functional sections: a substrate section for electrical connection and a separate invasion section for penetrating the detection target. This segmentation allows the sensor to transition from non-invasive test strip format to invasive probe format, enabling continuous monitoring while maintaining manufacturing simplicity.
Solution Approach 2:
The invasion sections of multiple wire electrodes are wound around one another in a spiral manner, adding a dimensional aspect to the electrode arrangement. This spiral configuration enables the electrodes to adapt to cylindrical or curved detection targets while maintaining electrical connection through the substrate section.
2Reliability
If invasive electrochemical sensor is developed to enable continuous monitoring, then the monitoring capability is improved, but the production cost increases
Solution Approach 1:
The substrate serves multiple functions: it provides structural support, establishes electrical connections between wire electrodes and gold fingers, and anchors the entire assembly. This multi-functionality reduces the need for additional components, thereby lowering production costs while enabling reliable continuous monitoring.
Solution Approach 2:
The wire electrodes are designed with insulating sheaths that automatically protect the conductive cores, and the spiral winding of invasion sections allows the sensor to self-adjust to different target geometries. These self-service features reduce manufacturing complexity and cost while ensuring reliable operation.
3Adaptability or versatility
If wire electrodes with spiral invasion sections are used, then the adaptability to various detection targets is improved, but the device complexity increases
Solution Approach 1:
The invasion sections of the wire electrodes are wound in a spiral manner around one another, creating a curved, flexible configuration that can adapt to cylindrical or curved detection targets such as blood vessels or plant stems. This spiral geometry provides geometrical adaptability without requiring complex mechanical adjustment mechanisms.
Data Source
AI summary
An invasive multi-electrode electrochemical sensor includes a substrate, plural wire electrodes, a cover plate, and plural gold fingers. Each wire electrode includes an electrically conductive core and an insulating sheath that substantially covers, but exposes a proximal end and a distal end of, the electrically conductive core. Each wire electrode has a substrate section provided on the substrate and an invasion section extending outward from an edge of the substrate. The proximal end and distal end of the electrically conductive core of each wire electrode are located at the substrate section and invasion section of the wire electrode respectively. The invasion sections are at least partially wound around one another spirally. Each gold finger has an exposed section that is not covered by the cover plate and that extends in an insertion direction. Each invasion section has a front-side portion extending in a direction not parallel to the insertion direction.