Automatic Gas Shutoff Valve for Abnormal Flow Detection
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Solution Overview
Problem
Residential gas systems lack effective monitoring and automatic shutoff capabilities to prevent gas leaks, fires, and explosions, as existing solutions primarily rely on notification rather than immediate action and do not offer user override options for potential leaks.
Innovation Solution
A device installed on the main gas line that includes a flow meter, a valve, and a microcomputer in an intrinsically safe enclosure, capable of detecting abnormal gas flow, automatically shutting off the gas supply, and notifying users through a smartphone app, with an option for users to manually shut off the gas flow, even if the system fails to detect a leak.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing gas monitoring systems only provide notification when a leak is detected, then the system complexity is reduced, but the safety effectiveness deteriorates because immediate action is not taken to prevent property damage and fatalities
Solution Approach 1:
The system performs preliminary action by automatically shutting off the gas supply before a potential leak can cause property damage or fatalities. The microcomputer detects abnormal gas flow patterns and triggers the valve to close, preventing the harmful outcome before it occurs.
Solution Approach 2:
The system serves itself by automatically detecting gas flow abnormalities and executing the shutoff action without requiring human intervention. The microcomputer monitors the flow meter continuously and autonomously activates the valve when abnormal conditions are detected, making the system self-protecting.
2Speed
If the system automatically shuts off gas flow without user override capability, then the response speed to detected leaks is improved, but the ease of operation deteriorates because users cannot manually control the gas supply when the system fails to detect a leak
Solution Approach 1:
The system dynamically adapts its behavior based on user needs. The valve can be automatically actuated by the microcomputer when a leak is detected, or it can be manually operated by the user through the app interface. This dynamic flexibility allows the system to respond quickly to detected threats while maintaining user control for override scenarios.
Solution Approach 2:
The system provides feedback to the user through the smartphone app, allowing real-time monitoring of gas flow and manual override capability. The user receives notifications about system status and can manually activate the valve closure if they detect a leak that the system has not yet identified, creating a feedback loop between automatic detection and user intervention.
3Reliability
If real-time monitoring and automatic shutoff capabilities are added to residential gas systems, then the safety against gas leaks is improved, but the device complexity increases due to additional components like flow meters, valves, and microcomputers
Solution Approach 1:
The microcomputer performs multiple functions: it monitors gas flow data from the flow meter, analyzes the data for abnormal patterns, controls the valve actuation, and communicates with the user's smartphone app. By consolidating these functions into a single microcomputer unit, the system achieves high safety functionality without proportionally increasing overall system complexity.
Solution Approach 2:
The system merges the monitoring, analysis, control, and communication functions into an integrated unit. The flow meter, valve, microcomputer, and communication module work as a unified system rather than separate independent components, reducing the overall complexity while maintaining comprehensive safety capabilities.
Data Source
AI summary
A natural gas automatic shutoff system can analyze the flow rate of natural gas through a pipe. When an anomaly is detected, the device can prevent further flow of natural gas through the pipe and can automatically notify the homeowner or authorized monitor, such as through a cell phone application or other device. Additionally, the homeowner or authorized monitor can manually control and/or monitor the flow of gas through the pipe in real-time, such as through a cell phone application or other device. At least one exemplary embodiment uses a motorized ball valve to control the flow of gas, a flow meter to measure the rate of natural gas flow through the pipe, and a microcomputer to analyze the flow and send notifications to the homeowner or authorized monitor.