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荧光式光纤测温原理

荧光式光纤测温原理

光纤探头由ST接头、光纤光缆、末端感温端三部分组成。ST接头是与光电??榈牧硬糠?;光纤光缆为传光部分,内部为石英光纤,石英光纤外部有涂覆层和包层,最外部为特氟龙?;ぬ?;末端感温端含有感温稀土材料,受固定波长光线照射后激发荧光。激励停止后,荧光余辉的衰变时间常数和温度的关系是类指数函数。通过测量余辉的时间常数即可求得温度;光纤整体耐200℃高温,外表直径为3mm。长期弯曲半径13.2cm。短期弯曲半径4.4cm。

荧光式光纤传感器原理图

荧光光纤测温

传感器探头材质稀土荧光物质,相比其他光纤温度测量原理,其最大优点就是温度测量与光强无关。在硬件上对荧光强弱、光路衰减以及电路漂移的不一致性具有较强兼容性。也因此不受电磁场干扰、耐受高压,非常适用于高电压、强磁场、易燃易爆的测温场合。

光纤联系