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光纤火警报警系统是用于保护重要仪器设备的一种有效的手段,是为了探测在变化的背景温度下(从室温到500-600℃),局部温度出现至少50-100℃的温度升高(对应出现火险的情形)。传感器保护的范围约1-3米,空间分辨率至少30cm。系统采用荧光寿命作为传感参量,有两种情形可以改变测得的荧光寿命,必须加以区分:一种情况是传感器局部出现高温点,意味着在该处出现火情;另一种情况是背景温收稿日期:2003 07 01 孙伟民,wmsun@optics teaching.org,本项目受到黑龙江省自然科学基金项目(A0308)支持。·771· 第2期NewDesignofFiber-BasedFireAlarmSystem2004年度整体发生变化,在实际应用时环境背景温度可能有几百度的温度波动。本文采用了两种方式来区分以上两种情况:一种是采用一小段高掺杂荧光光纤作为点式参考光纤,称为参考法:一种是对测得的荧光衰减信号进行修正,称为修正法。分别给出了两种方法的实验系统及测试结果。
Fiber optic fire alarm systems are an effective means of protecting critical instrumentation in order to detect temperature increases of at least 50-100 ° C for localized temperatures at varying background temperatures (from room temperature to 500-600 ° C) ( Corresponding to the case of fire). Sensor protection range of about 1-3 meters, the spatial resolution of at least 30cm. The system uses the fluorescence lifetime as the sensing parameter, and there are two scenarios that can change the measured fluorescence lifetime and must be distinguished: one is when the sensor is locally hot, which means there is a fire there; the other is the background Wen Received Date: 2003 07 01 Sun Weimin, wmsun @ optics teaching.org, This project is supported by the Natural Science Foundation of Heilongjiang Province (A0308). · 771 · Issue 2 NewDesignofFiber-BasedFireAlarmSystem The year of 2014, there is a shift in temperature. In practical applications, the ambient background temperature may fluctuate by several hundred degrees. This article uses two ways to distinguish between the above two cases: one is the use of a short section of highly doped fluorescent fiber as a point of reference fiber, known as the reference method: one is to measure the fluorescence attenuation signal correction, known as Amendment Act. The experimental system and test results of two methods are given respectively.