Fire detection system

The fire detection system uses frequency spectral analysis to accurately detect fires by analyzing the slope of the frequency spectrum's approximation line, overcoming environmental obstructions and specifying the fire's depth-direction position in two-dimensional images.

JP2026109032APending Publication Date: 2026-07-01HOCHIKI CORP
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Patent Information

Application Number
JP2024223829
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2026-07-01

AI Technical Summary

Technical Problem

Conventional fire detection systems struggle to accurately specify the three-dimensional position of a fire in a monitoring area due to limitations in capturing depth information from two-dimensional images and are susceptible to environmental factors that obstruct flame and smoke detection.

Method used

A fire detection system that performs frequency spectral analysis on consecutive images to identify the slope of the frequency spectrum's approximation line, utilizing reflections from fire flames on predetermined surfaces to determine the fire's depth-direction position, even in obstructed views.

Benefits of technology

Enables accurate fire detection by distinguishing fire-related events from non-fire events, regardless of environmental conditions, and identifies the fire's location in the depth direction within the monitoring area.

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Abstract

This system enables easy and accurate detection of fires by using fluctuations in captured images to identify fire-related phenomena such as flames and reflected light. [Solution] The fire detection system 1 detects fires based on captured images taken of a monitoring area by an imaging device 10. The frequency spectrum analysis unit 25 performs a predetermined frequency spectrum analysis on a predetermined number of temporally consecutive captured images, and detects fires based on the slope of the approximate curve of the frequency spectrum in the frequency spectrum graph obtained from the predetermined frequency spectrum analysis, which is represented by the logarithm of frequency and the logarithm of intensity.
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Citation Information

Patent Citations

  • Fire detection system and fire detection method

    JP2015114930A

  • Smoke detection device and smoke identification method

    JP2020057236A

  • Flame detection apparatus, flame detection method, and program

    JP2023142917A

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    JP2024059347A

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    JP2025101875A