Gas Sensor Degradation Simulator with Time Constant and Dead Time Delays
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Solution Overview
Problem
Conventional degradation simulators for gas sensors are limited in their ability to simulate various degradation states that can occur, particularly due to factors other than sensor element degradation, such as adhesion of substances to the element cover, which affects the output of gas sensors.
Innovation Solution
A degradation simulator for gas sensors that includes a sensor element with a solid electrolyte layer and electrodes, featuring a vent hole for ambient gas introduction, with functions to variably set time constant delay and dead time delay, allowing for the generation of pseudo-degraded sensor output signals to simulate various degradation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional degradation simulators are used, then sensor element degradation can be simulated, but other degradation causes such as adhesion of substances to element cover cannot be simulated
Solution Approach 1:
The invention segments the degradation simulation into multiple independent components: time constant delay simulation and dead time delay simulation. Each component addresses a specific degradation mechanism (sensor element degradation and adhesion/contamination respectively), allowing comprehensive simulation of various degradation causes through combination of these segmented functions.
Solution Approach 2:
The degradation simulator is designed with multi-functionality to handle multiple degradation types. By incorporating both time constant delay adjustment and dead time delay adjustment capabilities, a single device can simulate various degradation scenarios including sensor element degradation, adhesion of substances, and contamination, making it universally applicable to different gas sensor degradation cases.
2Device complexity
If only sensor element degradation is simulated, then the simulation is simple, but it does not reflect real-world degradation conditions
Solution Approach 1:
The simulator employs dynamic adjustment capabilities for both time constant and dead time parameters. These parameters can be varied in real-time to match different degradation scenarios, allowing the system to adapt from simple sensor element degradation simulation to complex real-world conditions involving adhesion and contamination without requiring physical reconfiguration.
Solution Approach 2:
The invention utilizes parameter changes as the core mechanism for simulating different degradation types. By changing the time constant parameter and dead time parameter to different values, the simulator can represent various degradation states. This parameter-based approach allows comprehensive degradation simulation while maintaining relatively simple device structure, avoiding the need for complex physical modifications.
Data Source
AI summary
The degradation simulator is used for a gas sensor including a sensor element having a solid electrolyte layer and a pair of electrodes located opposite to each other across from the solid electrolyte layer, the sensor element outputting a sensor output signal having a value depending on concentration of a specific gas in the ambient gas. The degradation simulator includes a first setting function of enabling variably setting a time constant delay which appears on the sensor output signal when concentration of the specific gas changes, a second setting function of enabling variably setting a dead time delay which appears on the sensor output signal when concentration of the specific gas changes, and an adding function of adding at least one of the time constant delay and dead time delay to the sensor output signal in order to generate a pseudo-degraded sensor output signal in accordance with an external instruction.