On-Board Hydrocarbon Gas Generator for Sensor Calibration
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Solution Overview
Problem
Existing gas sensors require cumbersome and expensive calibration with bulky test gas cylinders, making frequent calibration time-consuming and inefficient, especially in hazardous environments where reliability is critical.
Innovation Solution
A self-calibrating gas sensor system comprising a hydrocarbon gas generating device with a heater and gas releasing material, allowing on-board generation and delivery of hydrocarbon gases like methane for testing, eliminating the need for bulky cylinders and enabling convenient, energy-efficient calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration is performed using external gas cylinders, then measurement precision is maintained, but device complexity and portability are worsened
Solution Approach 1:
The patent combines the gas sensor and calibration gas generator into a single integrated device. The gas generator includes a heater and gas releasing material that are incorporated within the same housing as the sensor, eliminating the need for separate external cylinders and calibration equipment. This merging resolves the contradiction by maintaining calibration accuracy while significantly reducing device complexity and improving portability.
Solution Approach 2:
The device performs self-calibration using an onboard gas generation system. The gas generator automatically produces calibration gas (methane or propane) when activated, allowing the sensor to calibrate itself without requiring external gas cylinders or manual intervention. This self-service capability maintains measurement precision while reducing the complexity of the overall calibration system.
2Measurement precision
If calibration is performed using external gas cylinders, then measurement precision is maintained, but ease of operation is worsened
Solution Approach 1:
The gas sensor system performs self-calibration through an automated onboard gas generation mechanism. Users simply activate the gas generator, which automatically produces and delivers calibration gas to the sensor without requiring manual handling of external cylinders or complex calibration procedures. This significantly improves ease of operation while maintaining calibration accuracy.
Solution Approach 2:
The patent extracts the calibration gas generation function from external cylinders and integrates it directly into the sensor device. The gas releasing material and heater are incorporated within the device housing, allowing calibration to be performed internally without the need for external gas supplies. This extraction and integration makes the system more portable and easier to operate in various locations.
3Reliability
If calibration is performed frequently, then reliability is improved, but loss of time increases
Solution Approach 1:
The integrated gas sensor and calibration system enables rapid self-calibration that can be performed quickly and repeatedly without significant time loss. The onboard gas generator produces calibration gas on-demand, eliminating the need to transport, connect, and configure external cylinders. This allows frequent calibration to maintain reliability while minimizing the time required for each calibration cycle.
Solution Approach 2:
The system is designed to support periodic calibration cycles that can be performed at regular intervals without substantial time loss. The automated gas generation and calibration process can be rapidly repeated, allowing the sensor to be calibrated frequently to maintain reliability while keeping the total time investment manageable through efficient, rapid calibration cycles.
4Reliability
If calibration is performed frequently, then reliability is improved, but use of energy increases
Solution Approach 1:
The system enables periodic calibration cycles that balance reliability maintenance with energy conservation. The gas generator can be activated only when calibration is needed, rather than continuously, allowing frequent calibration to maintain sensor reliability while controlling overall energy consumption through on-demand operation of the heating and gas generation components.
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 efficient and convenient on-board calibration and testing of gas sensors, reducing costs and time while ensuring reliable operation in hazardous environments by using a compact, energy-efficient hydrocarbon gas generating device.
Implementation Method 1
heating the reagents sufficient to produce a hydrocarbon gas
Data Source
AI summary
Embodiments of the present invention relate a gas sensor comprising a gas detector and a hydrocarbon gas generating device, wherein the hydrocarbon gas generating device is positioned to provide an amount of hydrocarbon gas to the gas detector for testing. The hydrocarbon gas generating device comprises a heater and a gas releasing material.