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荧光式光纤测温原理

荧光式光纤测温原理

光(guang)(guang)(guang)(guang)(guang)纤(xian)(xian)探头由(you)ST接(jie)(jie)头、光(guang)(guang)(guang)(guang)(guang)纤(xian)(xian)光(guang)(guang)(guang)(guang)(guang)缆(lan)、末端(duan)(duan)(duan)感(gan)温(wen)(wen)(wen)端(duan)(duan)(duan)三部(bu)(bu)分(fen)组成。ST接(jie)(jie)头是与光(guang)(guang)(guang)(guang)(guang)电模块的连接(jie)(jie)部(bu)(bu)分(fen);光(guang)(guang)(guang)(guang)(guang)纤(xian)(xian)光(guang)(guang)(guang)(guang)(guang)缆(lan)为(wei)传光(guang)(guang)(guang)(guang)(guang)部(bu)(bu)分(fen),内部(bu)(bu)为(wei)石英光(guang)(guang)(guang)(guang)(guang)纤(xian)(xian),石英光(guang)(guang)(guang)(guang)(guang)纤(xian)(xian)外(wai)部(bu)(bu)有(you)涂覆(fu)层(ceng)和包层(ceng),最(zui)外(wai)部(bu)(bu)为(wei)特氟龙(long)保护套(tao);末端(duan)(duan)(duan)感(gan)温(wen)(wen)(wen)端(duan)(duan)(duan)含有(you)感(gan)温(wen)(wen)(wen)稀土材料,受固定(ding)波长(zhang)(zhang)光(guang)(guang)(guang)(guang)(guang)线照射后激发荧光(guang)(guang)(guang)(guang)(guang)。激励停止后,荧光(guang)(guang)(guang)(guang)(guang)余辉(hui)的衰变时(shi)间常数和温(wen)(wen)(wen)度的关系是类指数函数。通过测量余辉(hui)的时(shi)间常数即可(ke)求得温(wen)(wen)(wen)度;光(guang)(guang)(guang)(guang)(guang)纤(xian)(xian)整体耐200℃高温(wen)(wen)(wen),外(wai)表直径(jing)为(wei)3mm。长(zhang)(zhang)期弯曲半径(jing)13.2cm。短期弯曲半径(jing)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(guang)物质,相比其他光(guang)纤温度(du)(du)测(ce)量(liang)原理,其最大优点(dian)就是温度(du)(du)测(ce)量(liang)与光(guang)强(qiang)无关。在硬件上对荧光(guang)强(qiang)弱、光(guang)路(lu)衰减以及电路(lu)漂(piao)移的(de)不(bu)一(yi)致性(xing)具(ju)有较强(qiang)兼容性(xing)。也因此不(bu)受电磁场(chang)干扰、耐受高(gao)压,非常适用(yong)于高(gao)电压、强(qiang)磁场(chang)、易(yi)燃易(yi)爆的(de)测(ce)温场(chang)合。

光纤联系

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