Fire Shutter Backup Control for Power Outage and PLC Failure
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Solution Overview
Problem
Fire shutters in semiconductor or display manufacturing plants fail to operate normally during power failures or damage to control devices, allowing toxic gases to spread and exacerbate fire damage.
Innovation Solution
A dual power supply system with an emergency power source and a dual signal generation system, including a programmable logic controller and timer, ensures the fire shutter operates even in power failures or control device damage, using a battery and charger to provide backup power and applying multiple control signals to ensure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single power supply system is used for the fire shutter, then the system is simple and cost-effective, but the fire shutter cannot operate during power failures
Solution Approach 1:
The emergency power supply unit is charged in advance during normal operation, storing energy before it is needed. When a power failure occurs, the pre-charged battery immediately supplies power to the drive motor, ensuring continuous operation without interruption.
Solution Approach 2:
The system incorporates a backup power supply mechanism that cushions against the harmful effect of power failures. The emergency power supply unit acts as a protective buffer, ensuring the fire shutter can complete its closing operation even when main power is interrupted.
2Reliability
If a single control signal path is used for the fire shutter, then the control system is simple, but the fire shutter may fail to operate when the PLC is damaged or malfunctioned
Solution Approach 1:
The timer unit serves as an intermediary control element that can initiate the fire shutter closing operation independently of the PLC. When the PLC fails, the timer receives the fire alarm signal and directly activates the drive motor, providing an alternative control path.
Solution Approach 2:
The control system is segmented into multiple independent control units (PLC and timer) that can operate separately. This segmentation ensures that failure of one control unit does not prevent the fire shutter from operating, as the other unit can take over.
3Reliability
If the fire shutter is made robust to withstand fire conditions, then it can block flames and smoke effectively, but it becomes more expensive and complex
Solution Approach 1:
The fire shutter utilizes phase change materials or materials with specific thermal properties that change state or behavior under fire conditions. This allows the shutter to maintain structural integrity and blocking capability without requiring overly complex or expensive construction.
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
The system ensures the fire shutter operates reliably, preventing toxic gas spread and minimizing fire damage by maintaining functionality during power outages or control device failures.
Implementation Method 1
A dual power supply system with an emergency power source and a dual signal generation system, including a programmable logic controller and timer, ensures the fire shutter operates even in power failures or control device damage, using a battery and charger to provide backup power
Data Source
AI summary
A fire shutter control system and a fire shutter control method capable of effectively controlling a fire shutter in the event of a fire in a building are provided. The fire shutter control system may include a fire detector configured to detect a fire outbreak and generate a fire signal in the event of a fire; a fire shutter controller configured to apply a control signal to a fire shutter to enable a drive motor for operating the fire shutter to operate when the fire signal is generated by the fire detector; and a power supply unit configured to supply power to the fire detector, the fire shutter controller, and the drive motor for operating the fire shutter.