Integrated Dual-Sensor Structure for Sub-Second Hydrogen Detection
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Solution Overview
Problem
Conventional semiconductor metal oxide hydrogen sensors fail to meet the rapid response and recovery time requirements for hydrogen leakage detection, particularly in new energy vehicles, with existing methods like CNN-LSTM-based prediction taking too long to determine hydrogen concentration.
Innovation Solution
An integrated structure of an ultrafast response hydrogen sensor that collects voltage differential signals from two hydrogen sensors, utilizing a gas path chamber and a gas extractor, with sensors aligned in a straight line and sharing a port, and adjusting the distance and gas flow rate to enhance response speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional semiconductor metal oxide hydrogen sensors are used, then the structure is simple and manufacturing is easy, but the response time and recovery time are too long to meet the 1 second requirement
Solution Approach 1:
The patent divides a single sensor measurement task into two sequential sensor measurements. The first sensor (S1) measures the initial hydrogen concentration, and the second sensor (S2) measures the concentration after a fixed time delay. By comparing these two measurements, the system achieves rapid hydrogen detection without requiring a single sensor to complete the entire measurement cycle alone, thus reducing the effective response time while using conventional sensor components.
Solution Approach 2:
The patent implements preliminary action by having the first sensor (S1) perform its measurement and establish a baseline reading before the second sensor (S2) begins its measurement. This preliminary measurement allows the system to detect changes in hydrogen concentration more rapidly by comparing against the established baseline, rather than waiting for a single sensor to complete a full response cycle.
2Force
If the distance between the two hydrogen sensors is increased, then the gas flow rate can be optimized, but the response time may be affected
Solution Approach 1:
The patent systematically varies the distance parameter between the two sensors and the gas flow rate parameter to optimize system performance. By adjusting these parameters, the system finds an optimal balance where the gas flow rate is sufficient to transport hydrogen quickly between sensors, while the distance remains short enough to maintain sub-second response times. This parameter optimization allows the system to achieve rapid response without compromising gas flow characteristics.
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 integrated structure achieves significantly faster hydrogen detection by reducing response time to less than 1 second, allowing rapid concentration measurement and recovery, adaptable to various hydrogen detection scenarios.
Implementation Method 1
a gas extractor fixed to a gas inlet of the gas path chamber; a gas flow rate generated by the gas extractor is at a range of 5-500 sccm
Implementation Method 2
the first hydrogen sensor and the second hydrogen sensor have identical structure and hydrogen-sensitive characteristics; a hydrogen-sensitive material of the first hydrogen sensor and the second hydrogen sensor is specifically a palladium metal material
Implementation Method 3
DC voltage is applied to the Port A of the first hydrogen sensor and the Port B of the second hydrogen sensor, and the Port B of the first hydrogen sensor is connected to the Port A of the second hydrogen sensor to form a shared port, and the shared port serves as a voltage output port
Data Source
AI summary
An integrated structure of an ultrafast response hydrogen sensor includes: a gas path chamber; a gas extractor fixed to a gas inlet of the gas path chamber; and a first hydrogen sensor and a second hydrogen sensor provided inside the gas path chamber; wherein the gas extractor is located in an identical straight line with the first hydrogen sensor and the second hydrogen sensor; the first hydrogen sensor and the second hydrogen sensor each have an Port A and a Port B, and DC voltage is applied to the Port A of the first hydrogen sensor and the Port B of the second hydrogen sensor, and the Port B of the first hydrogen sensor is connected to the Port A of the second hydrogen sensor to form a shared port, and the shared port serves as a voltage output port.