Remote Gas Sensor Calibration via Central Controller
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Solution Overview
Problem
The existing methods for testing and calibrating gas sensors are labor-intensive and require frequent on-site visits, especially in industries with numerous sensors, which can lead to inefficiencies and potential failures between testing periods.
Innovation Solution
A system and method for remotely testing and calibrating gas sensors using a central controller that allows for the flow of purge and calibration gases into a sensor cavity, enabling remote zeroing and calibration, with automatic or manual control, reducing the need for technician presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas sensors are tested frequently to ensure continuous performance, then reliability is improved, but loss of time and productivity deteriorate due to frequent technician visits
Solution Approach 1:
The gas sensor system performs self-diagnosis and self-calibration through automated testing. The sensor assembly includes a test port that allows automated introduction of test gases and automatic comparison of sensor readings against known concentrations, enabling the system to self-verify performance without technician intervention.
Solution Approach 2:
Manual mechanical testing procedures are replaced with automated electronic control systems. The central controller automatically manages test gas flow, sensor excitation, reading acquisition, and calibration adjustments, substituting the mechanical/ manual process with an automated control system that reduces time loss.
2Measurement precision
If technicians manually test and calibrate each sensor on-site, then measurement precision is maintained, but device complexity and ease of operation worsen due to manual intervention requirements
Solution Approach 1:
The sensor assembly incorporates multiple functions within a single integrated unit. The housing includes both operational sensing capabilities and built-in test ports for calibration, allowing the same device to perform both monitoring and self-diagnosis functions, thereby maintaining precision without requiring separate complex testing equipment.
Solution Approach 2:
A central controller acts as an intermediary between the sensor assemblies and the testing system. The controller manages communication with multiple sensors, coordinates test gas distribution, and processes calibration data, simplifying the overall system architecture while maintaining measurement precision through centralized control.
3Ease of operation
If manual calibration is performed only when technicians are present, then ease of operation is maintained, but productivity deteriorates due to limited testing frequency
Solution Approach 1:
The system implements periodic automated calibration cycles at predetermined intervals. The central controller schedules and executes calibration sequences automatically, introducing test gases at specific times and comparing sensor responses against reference values, thereby maintaining ease of operation while significantly increasing testing throughput through repeated periodic operations.
Solution Approach 2:
Test gases and calibration standards are pre-prepared and stored in the system, ready for immediate use. The automated system has pre-programmed calibration sequences and reference concentration values, allowing calibration to begin immediately when scheduled without requiring technicians to prepare materials or procedures on-site, thus improving productivity while maintaining operational simplicity.
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
This approach allows for efficient and remote testing and calibration of gas sensors, reducing labor burdens and ensuring continuous accuracy and non-stop performance by enabling remote adjustments and monitoring, thus improving operational efficiency and reliability.
Implementation Method 1
The gas sensor is for sensing a preselected gas
Implementation Method 2
the purge gas is allowed to flow into the cavity, and once the purge gas in the cavity is equilibriated
Implementation Method 3
the calibration gas mixture is allowed to flow into the cavity, until the calibration gas mixture is equilibriated
Data Source
AI summary
A system including one or more gas sensor assemblies having one or more gas sensors. The gas sensor is for sensing a preselected gas. The gas sensor assembly includes a housing with a cavity therein, and the sensor is mounted on the housing so that the sensor is able to detect the preselected gas in the cavity. The gas sensor assembly includes a sensor control module in communication with the gas sensor, and also in communication with a central controller. Via the central controller, the sensor may be tested using a purge gas, and the sensor may be zeroed if necessary. Also, via the central controller, the sensor may be calibrated using a calibration gas mixture having the preselected gas in a known concentration. The central controller is configured for manual or automatic testing and calibration. Accordingly, the testing and calibration, whether manual or automatic, is done remotely.