Optical Safety Detector Commissioning
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Solution Overview
Problem
Current safety system commissioning processes for networked safety systems, such as fire detection systems, are time-consuming and costly, requiring engineers to physically access detectors and travel frequently between detectors and the common control unit, posing safety risks and inefficiencies.
Innovation Solution
A method utilizing optical data signals to configure and update detectors remotely, eliminating the need for physical access and reducing travel, through a remote communication device with an optical data transmitter and receiver, allowing for two-way communication and automatic deactivation of the optical data receiver to prevent spurious signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If engineers physically access detectors mounted in difficult to reach places using specialist climbing or lifting equipment, then they can commission and maintain detectors, but this increases time consumption, cost, and safety risks
Solution Approach 1:
The patent replaces the mechanical approach of physically accessing detectors with optical wireless communication. Engineers use a hand-held device with an optical transmitter to communicate with detectors through visible or infrared light, eliminating the need to physically reach ceiling-mounted detectors. This substitution of mechanical access with optical communication resolves the contradiction by making detector commissioning and maintenance accessible without climbing equipment.
2Reliability
If engineers frequently travel between detectors and the common control unit, then they can update detector information, but this increases time consumption and reduces productivity
Solution Approach 1:
The patent introduces a hand-held device as an intermediary between the common control unit and detectors. The device receives detector information optically and can update detector memory without requiring the engineer to return to the control unit. This intermediary enables field updates, eliminating repeated trips between the control unit and detectors, thereby improving productivity while maintaining information accuracy.
Solution Approach 2:
The hand-held device enables engineers to perform commissioning and maintenance tasks independently at each detector location without needing to repeatedly access the central control unit. The device stores and processes detector information locally, allowing self-contained commissioning operations that improve productivity while ensuring reliable information transfer.
3Ease of operation
If optical data receivers remain activated continuously, then detectors can receive configuration signals, but this increases vulnerability to spurious or illicit signals
Solution Approach 1:
The patent implements periodic activation of optical data receivers rather than continuous operation. The receiver is activated only during commissioning or maintenance operations when a hand-held device is present, and deactivated otherwise. This periodic operation maintains detector configurability while minimizing exposure to spurious signals, as the receiver is inactive during normal operation when no legitimate communication is expected.
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 reduces safety risks, saves time and costs, and enables efficient commissioning and maintenance of safety systems without disrupting the live system, while minimizing the risk of spurious signals by allowing remote configuration and data updates.
Implementation Method 1
transmitting an optical data signal to the unit
Data Source
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AI summary
A nodal system (10) includes a unit (D) having a memory (42) and an optical data receiver (36), and a common control unit (12) in communication with the unit. A method of commissioning the system comprises the steps of activating the optical data receiver on the unit, and transmitting an optical data signal to the unit, thereby commissioning the unit.