A Method and System for Fire Detection in Power Tunnels Based on Array Infrared Thermometry

CN117839140BActive Publication Date: 2026-05-26SHANDONG CONTWELL COMM TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG CONTWELL COMM TECH CO LTD
Filing Date
2024-01-08
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The existing temperature measurement method of tunnel and utility tunnel robots is single-point temperature measurement, which results in low fire detection accuracy and is prone to misjudgment or missed detection, and cannot meet the needs of high-precision fire judgment.

Method used

A dot matrix infrared temperature sensor is installed on the tunnel utility robot. Combined with the temperature difference judgment rule, the unit time temperature rise judgment rule, and the adjacent dot matrix temperature measurement comparison rule in the direction of movement, a high-precision fire judgment is achieved through an optimized detection algorithm. An ultraviolet flame sensor is also equipped for auxiliary detection.

Benefits of technology

This improved the accuracy and reliability of fire detection, avoided missed detections or misjudgments, and ensured the safe operation of power tunnels.

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Abstract

This invention discloses a method and system for detecting fires in power tunnels based on matrix infrared thermometry. The method includes: real-time acquisition of the temperature, ambient temperature, and flame temperature at each point on the matrix thermometry detection surface of the power tunnel; initial determination of the presence of ignition points or potential ignition points in the detection area based on temperature difference and unit time temperature rise rules, and determination of the location and area of ​​the ignition points or potential ignition points; secondary confirmation of the initially determined ignition points or potential ignition points based on adjacent matrix thermometry comparison rules in the direction of movement and fire detection rules; if the secondary confirmation result is correct, determining the spray direction and spray volume of extinguishing agent based on the location and area of ​​the ignition point or potential ignition point, and extinguishing the fire; otherwise, continuing detection. This invention uses a matrix infrared thermometry sensor and, through optimized temperature measurement and detection algorithms, achieves more accurate fire detection in power tunnels.
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