Multi-Sensing Gas Detector with Segmented PID and GC Modules
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Solution Overview
Problem
Existing gas detection and analysis systems face a tradeoff between speed and specificity, with fast detectors lacking specificity and high-specificity detectors being slow, making them inadequate for real-time monitoring of multiple gases in various environments.
Innovation Solution
A multi-sensing mode gas detection system combining fast-response, low-specificity sensors (e.g., PID, TCD, FID) with slow-response, high-specificity sensors (e.g., GC+PID, GC+MS) that can operate independently or in parallel, allowing for real-time ambient air monitoring with enhanced accuracy and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If fast-response gas sensors are used for real-time monitoring, then response speed is improved, but gas specificity deteriorates
Solution Approach 1:
The system segments gas detection into two distinct functional modules: fast-response sensors (PID, TCD, FID) for rapid detection and slow-response high-specificity sensors (GC+PID, GC+MS) for precise identification. This segmentation allows each sensor type to operate at its optimal performance level without compromise
Solution Approach 2:
The patent merges multiple sensor types with complementary characteristics into a unified detection system. Fast sensors provide immediate response while slow sensors provide precise identification, and the controller integrates their outputs to achieve both speed and specificity simultaneously
2Measurement precision
If high-specificity gas detectors are used for accurate gas identification, then measurement precision is improved, but response speed deteriorates
Solution Approach 1:
Fast-response sensors perform preliminary detection to identify the presence and approximate concentration of gases. When anomalies are detected, the system then activates slow-response high-specificity sensors for detailed gas identification, avoiding unnecessary activation of slow sensors when conditions are normal
Solution Approach 2:
The system dynamically adjusts its detection strategy based on real-time conditions. The controller monitors fast sensor outputs and dynamically triggers slow sensors only when needed, creating a flexible detection system that adapts response speed and precision to actual environmental conditions
3Speed
If multiple sensor types are combined for both speed and specificity, then measurement precision and speed are improved, but device complexity increases
Solution Approach 1:
The controller serves multiple functions: it processes signals from all sensor types, determines when to activate slow sensors based on fast sensor readings, integrates data from different sensor modalities, and outputs comprehensive gas analysis. This multi-functionality reduces the need for separate control systems for each sensor type
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 real-time monitoring of gas concentrations with improved specificity and speed, suitable for diverse environments such as semiconductor facilities, steel manufacturing, and petrochemical plants, providing immediate warnings and detailed gas analysis.
Implementation Method 1
fast-response gas sensors with low specificity to single compound (e.g., photoionization detector (PID))
Implementation Method 2
fast-response gas sensors with low specificity to single compound (e.g., photoionization detector (PID), thermal conductivity detector (TCD))
Implementation Method 3
fast-response gas sensors with low specificity to single compound (e.g., photoionization detector (PID), thermal conductivity detector (TCD), flame ionization detector (FID))
Implementation Method 4
slow-response gas detectors with high specificity to each compound of interest (e.g., gas chromatograph (GC)+PID, GC+TCD, GC+FID, GC+mass spectrometer (MS))
Implementation Method 5
slow-response gas detectors with high specificity to each compound of interest (e.g., gas chromatograph (GC)+PID, GC+TCD, GC+FID, GC+mass spectrometer (MS))
Data Source
Figure 1A
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Figure 1C
AI summary
Embodiments of a gas detector with a first gas sensor having a first gas specificity and a first response time and a second gas sensor having a second gas specificity and a second response time. The first gas specificity is different than the second gas specificity, the first response time is different than the second response time, or both the first gas specificity and the first response time are different than the second gas specificity and the second response time. A readout and analysis circuit is coupled to the first and second gas sensors to read and analyze data from the first and second gas sensors, and a control circuit is coupled to the readout and analysis circuit and to the first and second gas sensors to execute logic that operates the first gas sensor, the second gas sensor, or both the first and second gas sensors.