Sprinkler Status Indicator Using Passive Wireless Transmitters
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Solution Overview
Problem
Existing fire suppression systems with automatic sprinkler heads lack the ability to wirelessly communicate their activation status to the monitoring system, leading to costly and maintenance-intensive solutions like installing flow sensors, which are also limited in providing specific information on active sprinkler heads.
Innovation Solution
Incorporating wireless transmitters or RFID tags into sprinkler heads that emit signals when activated by heat, allowing real-time communication with the alarm monitoring system, eliminating the need for internal power sources and reducing costs through non-contact energy transfer and passive RFID configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If flow sensors are installed in sprinkler standpipes to detect water flow and identify active sprinkler heads, then the ability to identify active sprinkler heads is improved, but the device complexity and maintenance requirements increase significantly
Solution Approach 1:
The patent replaces mechanical flow sensors with wireless transmitters that use electromagnetic signals to communicate sprinkler status. Instead of physically sensing water flow through pipes, the system uses wireless communication between sprinkler heads and the monitoring system, eliminating complex mechanical sensing infrastructure while maintaining the ability to identify active heads
Solution Approach 2:
The patent introduces wireless transmitters as intermediary devices between the sprinkler heads and the monitoring system. These transmitters act as mediators that carry status information wirelessly, replacing the need for physical flow sensors in the water distribution system and reducing overall system complexity
2Loss of information
If flow sensors are installed throughout the sprinkler system to provide real-time status information, then the information availability is improved, but the maintenance expense and ongoing operational burden increase
Solution Approach 1:
The sprinkler heads themselves perform the function of status reporting through integrated wireless transmitters. Each sprinkler head autonomously transmits its activation status without requiring external flow sensors or manual monitoring, eliminating ongoing maintenance of separate sensing infrastructure while ensuring continuous information availability
Solution Approach 2:
The system changes the operational parameter from passive flow detection to active wireless status transmission. By having sprinkler heads actively report their state rather than requiring continuous monitoring of water flow parameters, the system reduces maintenance needs while maintaining information availability
3Reliability
If hard-wired flow sensors are used to connect sprinkler heads to the alarm system, then the reliability of signal transmission is improved, but the installation cost and complexity increase
Solution Approach 1:
The patent replaces hard-wired electrical connections with wireless electromagnetic communication. Wireless transmitters in each sprinkler head send status signals without physical cables, reducing installation cost and complexity while maintaining reliable signal transmission through modern wireless communication protocols
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 cost-effective identification of active sprinkler heads, providing real-time status updates to the monitoring system without the need for extensive modifications or ongoing maintenance, enhancing the efficiency and reliability of fire suppression systems.
Implementation Method 1
The transmitter or tag can emit a wireless signal into an adjacent region which can in turn be sensed, via one or more receivers, by the local alarm monitoring system
Implementation Method 2
a conductive fusible link can be used to establish, at the sprinkler head, that the valve cap of the head has moved from a closed to an open position
Implementation Method 3
automatic sprinkler systems, which respond to heat generated by a fire, can be important additions to building monitoring or fire alarm system
Data Source
AI summary
A fire suppression valve includes an RF transmitter which transmits an indication that a closed valve has opened. The transmitter can be implemented as a passive wireless identifier tag energized by a source of wireless signals.