Gas Sensor Fault Detection via Virtual Leak Modeling
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Solution Overview
Problem
Conventional gas sensor fault diagnosis methods are inadequate for accurately detecting sensor faults in gas leak inspection devices, especially when dealing with varying workpiece sizes and gas leakage amounts, as they require physically creating a hole in the workpiece to simulate a gas leak.
Innovation Solution
A gas sensor fault detection device and system that includes a gas blowing unit to simulate a gas leak and a position fixing unit to align the gas blowing unit with a hypothetical leak position, coupled with a determination unit to assess sensor functionality based on the detected gas concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hole is made in the workpiece to cause gas leakage for fault diagnosis, then the gas sensor can be tested for leak detection capability, but the workpiece is physically damaged and the method cannot support various cases with different workpiece sizes and leakage amounts
Solution Approach 1:
The patent creates a virtual model of the workpiece with a hypothetical gas leak position instead of physically damaging the actual workpiece. This virtual copy allows repeated testing without consuming or damaging the real workpiece, while maintaining the ability to simulate different leak scenarios for various workpiece sizes.
Solution Approach 2:
The system pre-establishes a virtual model containing hypothetical gas leak positions before actual fault diagnosis is needed. This preliminary preparation enables quick adaptation to different workpiece types and sizes without requiring physical modification during the testing process.
2Ease of manufacture
If a hole is physically created in the workpiece for fault diagnosis, then gas leakage can be simulated, but the method lacks flexibility for different leakage amounts and workpiece types
Solution Approach 1:
Instead of physically modifying workpieces of various sizes and types to create leak holes, the system uses a virtual model that can be configured to represent different workpiece geometries and hypothetical leak positions, maintaining procedural simplicity while achieving versatility.
Solution Approach 2:
The system changes parameters in the virtual model (such as hypothetical leak position coordinates and workpiece dimensions) to accommodate different workpiece sizes and types, rather than physically altering the workpieces themselves. This allows flexible adaptation through software configuration.
3Measurement precision
If conventional fault diagnosis methods are used with physical holes in workpieces, then gas sensor testing can be performed, but the process is time-consuming and requires actual workpiece modification
Solution Approach 1:
The virtual model allows immediate simulation of gas leakage scenarios without the time-consuming process of physically creating holes in actual workpieces. The gas sensor can be tested against the virtual model's hypothetical leak positions, maintaining detection accuracy while eliminating preparation time.
Solution Approach 2:
The virtual model with hypothetical gas leak positions is prepared in advance, allowing the fault diagnosis process to begin immediately without requiring physical workpiece modification. This preliminary setup eliminates the time-consuming step of creating actual leak holes during each testing session.
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 accurate fault detection in gas sensors without physically damaging the workpiece, supporting inspections across various cases by simulating gas leaks with controlled gas flow and position adjustment, thus improving diagnostic precision and versatility.
Implementation Method 1
a gas sensor that detects the gas blown from the gas blowing unit of the gas sensor fault detection device
Data Source
AI summary
There is provided a gas sensor fault detection device that detects a sensor fault in a gas leak inspection device. The gas sensor fault detection device includes: a gas blowing unit that blows a gas toward a detection area of a gas sensor of the gas leak inspection device; and a position fixing unit that fixes a position of the gas blowing unit with reference to a hypothetical gas leak position of an inspection target being inspected by the gas leak inspection device.