光纤测温系统识别短周期事件的方法

The method of identifying short period events in optical fiber temperature measurement system

分布式光纤测温系统中,如果系统的空间分辨率大于被测量事件在空间上的长度,则分布式光纤测温系统会出现事件漏采集现象。分析分布式光纤测温系统信号采样的实现原理,针对空间短周期事件的信号特点,系统在周期采样的基础上增加异步触发机制,采用事件信号异步触发识别短周期事件。通过同步与异步组合采样的方法,分布光纤测温系统可以极大的提高对于超短周期事件的识别能力。

In distributed optical fiber temperature measurement system, if the spatial resolution of the system is larger than the length of the measured event in space, the event leakage collection will occur. The principle of signal sampling in distributed optical fiber temperature measurement system is analyzed. According to the characteristics of short period events in space, the system adds asynchronous trigger mechanism on the basis of periodic sampling, and uses event signal asynchronous trigger to identify short-period events. By the method of synchronous and asynchronous sampling, the distributed fiber temperature measurement system can greatly improve the recognition ability of the ultrashort period events.