Conductive Polymer Methane Sensor for Room-Temperature Detection
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Solution Overview
Problem
Existing methane sensors suffer from high power consumption, high operating temperature, expensive equipment, and bulky shells, which pose challenges in efficient and cost-effective methane detection.
Innovation Solution
A methane sensor is developed using a conductive polymer film made of PEDOT:PSS on a flexible substrate with a conductive connection electrode and insulating layer, allowing for sensitive and rapid methane detection with reduced size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional methane sensors are used, then methane detection function is achieved, but power consumption is high
Solution Approach 1:
The patent changes the material parameter of the sensing electrode from traditional metal oxides to conductive polymers (PEDOT:PSS), which operate at room temperature instead of high temperatures, thereby reducing power consumption while maintaining detection functionality
Solution Approach 2:
The patent uses composite material PEDOT:PSS (poly(3,4-ethylenedioxythiophene):poly(styrene sulfonic acid)) as the sensing electrode material, combining conductive polymer properties to achieve low power consumption and high sensitivity detection
2Temperature
If conventional methane sensors are used, then methane detection function is achieved, but operating temperature is high
Solution Approach 1:
The patent changes the operating temperature parameter from high temperature (conventional metal oxide sensors require heating) to room temperature operation by using conductive polymer materials that are active at lower temperatures
Solution Approach 2:
The patent replaces the thermal field mechanism (heating-based detection) with an electrical field mechanism (conductive polymer-based detection), eliminating the need for high temperature operation while maintaining detection capability
3Ease of manufacture
If conventional methane sensors are used, then methane detection function is achieved, but equipment cost is high
Solution Approach 1:
The patent adopts inexpensive conductive polymer materials and simple screen printing fabrication methods, replacing expensive metal oxide materials and complex manufacturing processes, thereby reducing equipment cost while maintaining detection functionality
Solution Approach 2:
The patent uses screen printing technology to fabricate the sensor, which is a low-cost copying method that can mass-produce sensors with consistent performance, reducing manufacturing cost compared to conventional fabrication methods
4Volume of moving object
If conventional methane sensors are used, then methane detection function is achieved, but equipment size is large
Solution Approach 1:
The patent uses thin film conductive polymer layers as the sensing electrode, replacing bulky solid-state components, thereby reducing sensor size and enabling flexible, miniaturized sensor designs
Solution Approach 2:
The patent divides the sensor into functional layers (substrate, conductive connection electrode, insulating layer, sensing electrode), allowing for compact integration and miniaturization while maintaining each component's detection function
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
The sensor achieves high flexibility, low cost, fast response, and high sensitivity, with a detection range from 0 to 0.8×10^6 ppm and a detection limit of 600 ppm, suitable for various applications.
Implementation Method 1
the sensing electrode is a layer of a conductive polymer film... PEDOT:PSS... made into the conductive polymer film by screen printing, printing method, or coating method
Data Source
AI summary
A methane sensor includes a substrate, a conductive connection electrode, and a sensing electrode, the conductive connection electrode is arranged on the substrate, and the sensing electrode is covered on the conductive connection electrode, the sensing electrode is a layer of conductive polymer film, and the conductive connection electrode is coated with an insulating layer in addition to the sensing area. The sensing electrode adopts one of poly (3,4-ethylenedioxythiophene):poly (styrene sulfonic acid), polyaniline, polythiophene and polypyrrole, which is made into a film by a screen printing, inkjet printing or other coating method in the form of liquid or paste. The present invention adopts the above methane sensor, with a small and stable sensor, realizing sensitive and rapid detection of methane, and solving the problems of high power consumption of methane sensors in the prior art, high working temperature, expensive and bulky casing of the equipment, and high price.