4.3.3 光源的选择····················································································47 4.4 气室的结构选择与设计········································································48 4.5 光路与光纤耦合部分············································································50 4.6 光电转换与信号处理部分····································································50 4.6.1 光电转换部分················································································50 4.6.2 信号的检测与处理部分································································52 4.7 光纤气体传感器理论模型机设计························································ 54 4.7.1 模型机市场现有器件分析····························································54 4.7.2 模型机设计部分············································································56 4.7.3 模型机总体构成············································································64 4.7.4 理论模型机的成本估算································································65 4.8 本章小结································································································65 第5 章 甲烷气体传感系统实验的可行性分析··············································67 5.1 引言········································································································ 67 5.2 DFBLD 光源光谱特性实验···································································67 5.3 甲烷的近红外吸收特性实验································································69 5.4 气体浓度与二次谐波幅值的关系实验················································· 72 5.5 双光路甲烷浓度检测实验····································································74 5.6 气体传感系统的重复性和稳定性实验················································· 75 5.6.1 重复性实验····················································································75 5.6.2 稳定性实验····················································································76 5.7 本章小结································································································76 |
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