Optical Flame Detector Self-Verification via Infrared Signaling
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Solution Overview
Problem
Conventional methods for verifying the operation of optical flame detectors (OFDs) are laborious, inefficient, and inaccurate, as they require a technician to manually test each location within the detector's field of view using a bulky test lamp, which may not cover the entire operating range and can be obstructed by equipment or environmental factors.
Innovation Solution
A digital infrared test signal source embedded in the OFD transmits a digital signal packet to a portable infrared test receiver, allowing for remote verification of OFD operation, including data such as serial number, sensitivity, and real-time clock values, facilitating verification without interrupting flame detection and enabling detection from multiple OFDs with improved signal-to-noise ratio through the use of a near-infrared filter and Manchester encoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a technician manually tests each location using a bulky test lamp, then the verification process can be performed, but the process becomes laborious and inefficient
Solution Approach 1:
Instead of having a technician manually move a test lamp to verify the detector's field of view, the patent embeds an infrared signal source within the detector itself that automatically transmits test signals. This inverts the conventional approach by making the detector verify itself, eliminating manual labor while maintaining verification accuracy.
Solution Approach 2:
The optical flame detector performs self-verification by embedding an infrared signal source that automatically transmits test signals and receives responses. This self-service capability eliminates the need for external technicians and bulky test equipment, significantly improving verification efficiency while ensuring reliable operation confirmation.
2Reliability
If a bulky test lamp is used for manual testing, then verification can be performed, but multiple personnel are required and the process is interrupted
Solution Approach 1:
The optical flame detector integrates multiple functions: it performs both normal flame detection and self-verification operations. The embedded infrared signal source and receiver are built into the detector unit, eliminating the need for separate bulky test equipment and multiple personnel, thereby reducing device complexity while maintaining detection accuracy.
3Measurement precision
If a manual test lamp method is used, then field of view verification can be attempted, but the entire operating range cannot be covered and detection is obstructed by equipment
Solution Approach 1:
The patent embeds the infrared signal source within the detector to emit test signals in all directions of the field of view simultaneously. This allows comprehensive coverage of the entire operating range without being obstructed by external equipment, achieving both precise verification and complete adaptability across all detection zones.
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 simplifies the verification process, reduces the need for multiple personnel, ensures accurate detection of the OFD's field of view, and provides a reliable record of verification data, while allowing for continuous flame detection without interruption.
Implementation Method 1
A digital infrared test signal source embedded in the OFD transmits a digital signal packet to a portable infrared test receiver
Data Source
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AI summary
Embodiments relate generally to systems, devices, and methods for verifying operation of an optical flame detector. A system may comprise an optical flame detector, wherein the optical flame detector comprises: a digital infrared test signal source, wherein the digital infrared test signal source is configured to transmit a digital infrared test signal; and at least one of an ultraviolet light sensor, a visible light sensor, and an infrared sensor; and an portable infrared test receiver, wherein the digital infrared test signal is receivable by the portable infrared test receiver, wherein the portable infrared test receiver is positioned to indicate whether a location of potential fire is within a field of view of the optical flame detector.