Treatment method of distribution type optical fiber temperature measuring data used for fire disaster alarm

Abstract

The invention relates to a treatment method of distribution type optical fiber temperature measuring data used for fire disaster alarm, which is characterized by comprising the following steps of: I, setting a temperature difference threshold Tf; II, intercepting the n+1 temperature data of the points to be detected on a cable and collected by a distribution type optical fiber temperature sensor system and tn refers to the currently latest temperature collection data of the points to be detected on the cable; III, calculating the average value of n temperature data before t, namely the first history temperature average value *1; IV, comparing tn with T1; if tn minus * is less than Tf, then the current temperature output value T of the points to be detected on the cable is outputted as that T=(*1 multiplied by(n+1)-x) + tn multiplied by x) / n+1; or the output value is outputted as that T=(*1 multiplied by(n+1)-y) + tn multiplied by y) / n+1; a DTS system after using the method can meet better precision requirement for insensitive areas on temperature change when the current output value of the points to be detected on the cable is outputted, and realize quicker response speed on the sensitive areas on temperature change.

Description

technical field [0001] The invention relates to a method for processing distributed optical fiber temperature measurement data for fire alarm. Background technique [0002] In highway tunnels, high-voltage cables and other projects, fire monitoring has always been the focus of the transportation and power departments. If there is no effective fire monitoring, when a fire occurs, there will often be serious accidents, which will bring great harm to the life and property of the country and the people. In recent years, tunnels have been built longer and more, and more and more urban high-voltage cables are buried underground, which makes the importance of fire monitoring more prominent. When the fire just broke out, the fire intensity, temperature, and destructiveness are relatively small. If the fire can be found and extinguished at this stage, the destructiveness and loss of the fire can be greatly reduced. [0003] Distributed optical fiber temperature sensor system (herein...

AI Technical Summary

Problems solved by technology

[0006] In the DTS system, the traditional processing method of temperature acquisition data is realized by the method of accumulation and averaging. 30,000 times. At this time, if the temperature data is output once after 3 times of cumulative average processing, the temperature accuracy of less than 3.5°C can be achieved. However, according to the requirements of users in the industry, the DTS system needs a temperature accuracy of less than 1.5°C, which requires at least 6 Accumulate and average the temperature acquisition data for more than one time, and then output the temperature data again, which requires at least 18 seconds of measurement time

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