现代电子技术

针对传统火焰探测器误报率高、响应迟滞等问题，提出了一种基于紫外/红外四波段融合的解决方案。构建了185~260 nm紫外特征与4.35 μm和2.7 μm红外特征波段协同感知体系，并引入4.8 μm红外波段补偿背景干扰。硬件层面采用国产EQ6HL9S型FPGA架构，实现了紫外脉冲纳秒级计数(±20 ns)与三波段红外信号同步采集。同时，提出了多光谱特征融合判决算法模型，缩短响应时间(10 ms@0.4 m标准火焰)；且设计了以紫外传感器为核心的三层PCB堆叠布局，缩减探测器体积，方便后续部署。结果表明，探测器对7类典型干扰源保持免疫且支持RS 485组网通信，可为石油化工、电力设备等空间敏感场景提供响应快、轻量化的火焰探测新范式。

In allusion to the high false alarm rate and delayed response of traditional flame detectors, a solution based on four⁃band ultraviolet⁃infrared fusion technology is proposed. The cooperative perception system of ultraviolet features from 185 nm to 260 nm and 4.35 μm/2.7 μm infrared feature bands is constructed, and a 4.8μm infrared band is introduced to compensate for the background interference. At the hardware level, the domestic EQ6HL9S type FPGA architecture is used to achieve the synchronous acquisition of nanosecond⁃level counting of ultraviolet pulses (±20 ns) and three⁃band infrared signals. A multi⁃ spectral feature fusion decision algorithm is proposed, shortening the response time (10ms@0.4m standard fire). A three⁃layer PCB stack⁃up layout centered on the ultraviolet sensor is designed, reducing the detector′s volume for easier subsequent deployment. The results demonstrate that the detector is immune to seven types of typical interference sources and supports RS 485 network communication, providing a new paradigm of fast⁃response and lightweight flame detection for space⁃constrained scenarios such as petrochemical facilities and power equipment.