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(本刊编译)美国科学家研发出一种可以在极端条件下使用的新型光学压力传感器。这种光纤传感器不但可以测量高达1800万帕(2620磅/平方英寸)的压力,将感测头放进-196℃的液态氮中或者加热到538℃,性能也不会有明显改变。这种传感器的概念来自于密西西比大学检测仪器和分析实验室(DIAL)的ChujiWang和SusanScherrer,他们将有名的“腔环降光谱法”技术应用在光纤传感器上,制造出一个名为“fiberringdownsensor”的仪器。其操作关键在于光脉冲的衰减时间强烈取决于在光纤环所造成的衰减,因此任何造成光纤传输改变的现象如外部的压迫(压力),都可藉由监控
(Article compiled) US scientists have developed a new type of optical pressure sensor can be used under extreme conditions. Not only does this fiber optic sensor measure pressures up to 18 million pascal (2620 psi), the sensor head does not drop significantly in liquid nitrogen at -196 ° C or 538 ° C. The concept of this sensor comes from ChujiWang and Susan Scherrer at the University of Mississippi Instrumentation and Analysis Laboratory (DIAL) who apply the well-known Cavity Drop Spectroscopy technology to optical fiber sensors to create a “ fiberringdownsensor ”instrument. The key to its operation is that the decay time of the light pulse strongly depends on the attenuation caused by the fiber ring, so any phenomenon that causes the fiber transmission to change, such as external compression (pressure), can be monitored