Dry Pipe RF Communication Using Pipes as Fire System Waveguides
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Solution Overview
Problem
Fire protection systems, particularly dry pipe sprinkler systems, face challenges in communication and corrosion monitoring due to the need for extensive wiring and battery maintenance, and existing wireless solutions are prone to interference and power issues.
Innovation Solution
The use of microwave or RF signals as a communication medium within the pipes of fire protection systems, enabling low-power devices like RFID to transmit and receive data without external power, and utilizing signal processing to monitor corrosion without physical testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If wireless communication is used in fire protection systems, then wiring complexity is reduced, but reliability deteriorates due to interference and power issues
Solution Approach 1:
The patent uses the existing pipe system as an intermediary medium to transmit communication signals. Instead of using traditional wireless air-based communication that is prone to interference, the system embeds communication functionality within the pipe infrastructure itself, allowing data transmission through the pipe walls while maintaining system reliability and eliminating extensive wiring requirements.
2Ease of operation
If RFID devices are used without external power, then ease of operation is improved, but power availability deteriorates
Solution Approach 1:
The patent implements self-powered RFID devices that harvest energy from the electromagnetic signals transmitted through the pipe system. The devices extract power from the communication signals themselves, eliminating the need for external power sources or battery replacements while maintaining ease of operation and installation.
3Reliability
If signal strength is maintained through waveguide pipes, then communication reliability is improved, but device complexity increases due to signal processing requirements
Solution Approach 1:
The patent makes the pipe system multi-functional by using it simultaneously for both fluid distribution and electromagnetic signal transmission. The same pipe infrastructure that delivers water also serves as a waveguide for communication signals, eliminating the need for separate communication wiring and reducing overall system complexity while maintaining reliable communication.
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 solution provides a reliable, secure, and efficient communication network within fire protection systems, reducing the need for extensive wiring and battery maintenance, while continuously monitoring corrosion levels and predicting pipe failures.
Implementation Method 1
The pipes of the fire protection system can act as a waveguide through which electronic components of the sprinkler system can communicate
Implementation Method 2
a first antenna that receives a fire detection signal from the sensor and a processing circuit that causes the first antenna to transmit a radio frequency signal corresponding to the fire detection signal through an internal volume of a pipe
Data Source
AI summary
A communication system includes a first radio frequency identification (RFID) device coupled to a sensor that monitors a fire condition and a second RFID device. The first RFID device includes at least one first antenna that receives a fire detection signal from the sensor, and a processing circuit that causes the at least one first antenna to transmit a radio frequency (RF) signal corresponding to the fire detection signal through an internal volume of a pipe coupled to a fluid source. The second RFID device includes at least one second antenna that receives the RF signal through the internal volume of the pipe. The second RFID device controls operation of a fluid distribution device responsive to receiving the indication of the fire detection signal.