Fuel Oil Identification via Surface Stress Sensor Coating
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Solution Overview
Problem
Conventional fuel oil identification methods using sensor arrays require multiple sensors with different receptor materials, which is complex and difficult for accurate identification of fuel oils with similar components, such as regular and high-octane gasoline, due to similar sensor responses.
Innovation Solution
A fuel oil identification method utilizing a surface stress sensor coated with hydrocarbon-group-modified particles, specifically nanoparticles of 100 nm or less, which detect changes in surface stress when contacted by fuel oil vapors, allowing for highly accurate identification using a single sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sensor array with multiple receptor materials is used for fuel oil identification, then the coverage of different fuel oil types can be improved, but the device complexity and difficulty of optimizing coating conditions increase
Solution Approach 1:
The patent combines multiple receptor materials into a single composite receptor layer that contains both polar and non-polar components. This single integrated layer can simultaneously interact with different fuel oil types (gasoline, diesel, kerosene) through its mixed composition, eliminating the need for multiple separate sensors while maintaining broad detection coverage
Solution Approach 2:
The composite receptor layer is designed to perform multiple detection functions simultaneously. By incorporating both polar and non-polar materials, a single sensor can detect various fuel oil types with different chemical properties, making the sensor universal for identifying regular gasoline, high-octane gasoline, diesel, and kerosene without requiring specialized sensors for each fuel type
2Measurement precision
If conventional sensor arrays are used for identifying fuel oils with similar components, then identification can be attempted, but the measurement precision decreases because most sensors show similar responses
Solution Approach 1:
The patent applies local quality by creating a receptor layer with spatially distributed components having different properties. The composite layer contains both polar and non-polar regions that locally interact with different components of fuel oils, enabling differentiation of similar fuel types through their distinct interaction patterns with the heterogeneous receptor surface
Solution Approach 2:
The patent uses composite materials by combining polar and non-polar receptor materials into a single layered structure. This composite approach allows the sensor to exploit different interaction mechanisms (polar interactions for some fuel components, non-polar interactions for others) simultaneously, generating distinctive response patterns that enable precise identification of similar fuel oils
3Reliability
If silicone rubber is used as the receptor layer material, then the sensor can detect gasoline vapor, but the response speed is slow due to slow absorption and release of vapor
Solution Approach 1:
The patent changes the physical and chemical parameters of the receptor layer by replacing silicone rubber with a composite material system having different absorption characteristics. The new composite receptor layer maintains detection reliability through its chemical interaction capabilities while improving response speed by utilizing materials with faster vapor uptake and release kinetics
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
This approach simplifies the identification process by reducing the need for multiple sensors and enhances accuracy, enabling the differentiation of various fuel oils, including regular gasoline, high-octane gasoline, and their mixtures, without requiring extensive optimization of coating conditions.
Implementation Method 1
a surface stress sensor adapted to detect a change in surface stress when the receptor layer is contacted by vapor of the fuel oil
Implementation Method 2
a receptor layer comprising particles of 1 mm or less in particle size and modified with hydrocarbon groups
Implementation Method 3
particles modified with hydrocarbon groups... having high compatibility with a main component of fuel oils
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
Provided is a sensor which enables detection/identification of various types of fuels for automobiles by using simple devices. According to the present invention, high-octane gas, regular gas, diesel oil, heating oil, gasoline laced with heating oil, and the like can be clearly identified without using a large-scale analysis such as gas chromatography or mass spectroscopy by using a sensor having a structure in which a surface of a sensor body which detects a surface stress or the like is coated with particles modified with a hydrocarbon group such as an alkyl group.