CGM Sensor Dip Coating with Laminar Flow for Uniform Membranes
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Solution Overview
Problem
Existing manufacturing processes for continuous glucose monitoring (CGM) sensors face challenges in achieving accurate and repeatable construction of membrane layers, affecting the performance and sensitivity of the sensors, which require frequent replacement and manual calibration.
Innovation Solution
A system and method for coating a working wire of a metabolic sensor using a dipping process with controlled laminar flow and environmental conditions, involving a baffle with specific apertures, optical measurement, and a controller to adjust dipping parameters, ensuring precise application of membrane layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual coating processes are used for sensor membrane layers, then manufacturing flexibility is maintained, but manufacturing precision and repeatability deteriorate
Solution Approach 1:
The coating system is divided into separate functional modules: a dipping station for coating, a laminar flow generator for controlled airflow, and an optical measurement system for verification. This segmentation allows each component to be optimized independently while working together to achieve precise membrane layer construction.
Solution Approach 2:
The patent replaces manual mechanical coating operations with an automated dipping process controlled by a computer system. The mechanical insertion and withdrawal of the sensor through the coating solution is precisely controlled, eliminating manual variability and achieving consistent membrane layer thickness.
2Manufacturing precision
If traditional dipping processes are used without flow control, then device complexity is reduced, but manufacturing precision deteriorates
Solution Approach 1:
The patent employs a laminar flow generator that uses controlled airflow (pneumatics) to create a steady, predictable flow pattern over the dipping station. This pneumatic system ensures consistent coating conditions by controlling air movement rather than requiring complex mechanical flow control mechanisms.
Solution Approach 2:
The system controls coating parameters by adjusting flow rate, temperature, and dipping speed rather than complex mechanical positioning. By changing these physical parameters, the system achieves precise coating uniformity with simpler overall device architecture.
3Reliability
If multiple membrane layers are constructed manually, then process adaptability is maintained, but manufacturing precision and repeatability deteriorate
Solution Approach 1:
The dipping station is designed to continuously coat multiple sensor elements in sequence without interruption. The automated system maintains continuous operation through the coating process, improving productivity while ensuring each sensor receives consistent coating treatment, thereby enhancing reliability.
Solution Approach 2:
An optical measurement system provides feedback on coating quality during the manufacturing process. This feedback mechanism allows real-time verification and adjustment of coating parameters, ensuring consistent sensor performance across all produced units while maintaining high production rates.
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 mass production of CGM sensors with improved accuracy, repeatability, and reduced need for patient calibration, enhancing sensor performance and extending the sensor's lifespan.
Implementation Method 1
a baffle configured to produce laminar flow over the dipping station
Data Source
AI summary
Systems and methods for coating a working wire of a metabolic sensor include a chamber, a dipping station in the chamber, and a baffle configured to produce laminar flow over the dipping station. A controller is configured to activate the laminar flow during a dipping cycle at the dipping station, the dipping cycle including an insertion of the working wire into a dipping solution and a withdrawal of the working wire from the dipping solution. The baffle includes a first plate having first apertures of a first size and a second plate having second apertures of a second size, wherein the first plate is positioned over the second plate, with the second plate toward the dipping station.