本文叙述的是用光纤传感器测量位置变化的方法。多年来,计量研究所一直进行着固体材料力学物性值的精密测置方法研究,但近几年来根据生产的需要,重点研究了陶瓷等耐热材料在高温下线膨胀温度系数和弹性温度系数的精密的绝对测定法。在测量尺寸变化的方法中,最准确的方法是利用光波干涉仪的绝对测长法。由于在中温区以下,它也是最可靠的测量方法,所以计量研究所将其确定测为精密标准测定方法。但是,由于光学反射镜不能耐某种程度以上的高温,故一般不能用于700～ This article describes the use of fiber optic sensors to measure changes in position. Over the years, Institute of Metrology has been studying the precision measurement of mechanical properties of solid materials, but in recent years according to the needs of production, focusing on the heat-resistant ceramics and other materials at high temperature linear expansion temperature coefficient of elasticity and temperature coefficient Precision absolute determination. The most accurate way to measure dimensional changes is to use the absolute length measurement of an optical interferometer. It is also the most reliable method of measurement below mid-temperature, so the Institute of Metrology has determined it to be a precision standard. However, since the optical reflector can not resist the high temperature above a certain level, it can not generally be used for 700 ~