CN101567117A - Treatment method of distribution type optical fiber temperature measuring data used for fire disaster alarm - Google Patents

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

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CN101567117A
CN101567117A CNA2009100988566A CN200910098856A CN101567117A CN 101567117 A CN101567117 A CN 101567117A CN A2009100988566 A CNA2009100988566 A CN A2009100988566A CN 200910098856 A CN200910098856 A CN 200910098856A CN 101567117 A CN101567117 A CN 101567117A
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temperature
optical cable
tested point
data
current
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CN101567117B (en
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金如江
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Ningbo Handy Sensor Technology Co., Ltd.
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金如江
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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<n>, namely the first history temperature average value *1; IV, comparing tn with T1; if tn minus *<1> 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

A kind of disposal route that is used for the distribution type optical fiber temperature measuring data of fire alarm
Technical field
The present invention relates to a kind of disposal route that is used for the distribution type optical fiber temperature measuring data of fire alarm.
Background technology
In engineerings such as vcehicular tunnel, high-tension cable, fire monitoring is the emphasis of traffic, power department always, if do not carry out effective fire monitoring, when breaking out of fire, often have major accident and take place, bring tremendous loss for thus the country and people's lives and properties, along with in recent years, the tunnel is built longer and longer, and the city high-tension cable is buried also more and more, makes the importance of fire monitoring appear suddenly all the more.When fire had just taken place, the intensity of a fire, temperature, destructiveness etc. were all smaller, if can just find fire and it is put out in this stage, can reduce the destructive and loss of fire greatly.
Distributed optical fiber temperature transducer system (hereinafter to be referred as the DTS system) is based on the principle of advanced optical time domain reflection (OTDR) technology and the Raman scattering temperature effect dorsad of optical fiber, with optical fiber is carrier, being closed by main frame, sensing optic cable and other enclosure group and to form, is developed recently a kind of new and high technology that is used for real-time monitoring temperature field of getting up in the world.
The common method that adopts the DTS system to carry out fire alarm has two kinds of constant temperature method and differential temperature methods.The constant temperature ratio juris is: determine that a certain temperature value (as 85 ℃) is the temperature alarming value, in the monitored area, will report to the police when the measurement temperature of optical fiber any measurement point on the time-space domain surpasses 85 ℃; And the differential temperature ratio juris is: equally also determine the temperature value (as 10 ℃) of a warning, when the difference of optical fiber twice temperature value measured in a certain measurement point front and back on the time-space domain surpasses 10 ℃, will report to the police.
No matter adopt the sort of method to report to the police, all need to use the Current Temperatures output valve of each tested point on the optical cable of DTS system output, the DTS system is on the output optical cable during Current Temperatures of each tested point, at first utilize the main frame of DTS system to gather the temperature data of each tested point on the optical cable in real time, after then these temperature acquisition data being handled by certain disposal route, as final measured temperature output, use during for fire alarm.
In the DTS system, traditional temperature acquisition processing method of data is the method realization by progressive mean, under present technical conditions, the main frame of DTS system generally is to gather temperature data 3 seconds one time, and can accomplish to add up for 3 seconds 30000 times, if at this moment handle temperature data of back output by 3 progressive means, can be less than 3.5 ℃ temperature accuracy, yet requirement according to user in the industry, the DTS system need be less than 1.5 ℃ temperature accuracy, so at least, need the temperature acquisition data more than 6 times to carry out progressive mean, and then export temperature data one time, need 18 seconds Measuring Time so at least.This is because the snr gain of DTS main frame after m accumulation is Therefore, realize that 1.5 ℃ temperature accuracy need add up for 6 times, promptly
For example: 3 seconds gathered temperature data one time by the main frame of DTS system, and the temperature data of gathering the first time of optical cable point is arranged as follows according to the time:
T 1＝{x 1，x 2，x 3，x 4，x 5，x 6，x 7，x 8…x n-2，x n-1，x n}；
If the DTS system adopts 3 progressive mean disposal routes, the sequence following (temperature accuracy is less than 3.5 ℃) of temperature data output at this moment:
T c n = { x 1 + x 2 + x 3 3 , x 4 + x 5 + x 6 3 , . . . x n - 2 + x n - 1 + x n 3 }
The temperature data of gathering the second time of optical cable point is arranged as follows according to the time:
T 2＝{x n+1，x n+2，x n+3，x n+4，x n+5，x n+6，x n+7，x n+8…x 2n-2，x 2n-1，x 2n}
The temperature data of gathering for the third time of optical cable point is arranged as follows according to the time:
T 3＝{x 2n+1，x 2n+2，x 2n+3，x 2n+4，x 2n+5，x 2n+6，x 2n+7，x 2n+8…x 3n-2，x 3n-1，x 3n}
The temperature data of the 4th collection of optical cable point is arranged as follows according to the time:
T 4＝{x 3n+1，x 3n+2，x 3n+3，x 3n+4，x 3n+5，x 3n+6，x 3n+7，x 3n+8…x 4n-2，x 4n-1，x 4n}
The temperature data of the 5th collection of optical cable point is arranged as follows according to the time:
T 5＝{x 4n+1，x 4n+2，x 4n+3，x 4n+4，x 4n+5，x 4n+6，x 4n+7，x 4n+8…x 5n-2，x 5n-1，x 5n}
The temperature data of the 6th collection of optical cable point is arranged as follows according to the time:
T 6＝{x 5n+1，x 5n+2，x 5n+3，x 5n+4，x 5n+5，x 5n+6，x 5n+7，x 5n+8…x 6n-2，x 6n-1，x 6n}
If the DTS system adopts 6 times traditional progressive mean disposal routes, the sequence following (temperature accuracy is less than 1.5 ℃) of temperature data output at this moment:
T c n = { x 1 + x 2 + x 3 + x 4 + x 5 + x 6 6 , x 7 + x 8 + x 9 + x 10 + x 11 + x 12 6 , . . . x 6 n - 5 + x 6 n - 4 + x 6 n - 3 + x 6 n - 2 + x 6 n - 1 + x 6 n 6 }
Promptly export a temperature data 18 seconds, a wherein up-to-date temperature data is:
x 6 n - 5 + x 6 n - 4 + x 6 n - 3 + x 6 n - 2 + x 6 n - 2 + x 6 n - 1 + x 6 n 6 .
Temperature data of kind output in 18 seconds, this time is a bit long for fire-fighting is used, and can not in time send alerting signal, so need do further improvement to the disposal route of DTS system temperature measurement data.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of disposal route that is used for the distribution type optical fiber temperature measuring data of fire alarm at above-mentioned prior art present situation, when utilizing the Current Temperatures output valve of the DTS system tested point on the output optical cable after this method, can satisfy accuracy requirement preferably to the not clear sensillary area territory of temperature variation, and realize response speed faster for the temperature variation sensitizing range.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: the disposal route that is used for the distribution type optical fiber temperature measuring data of fire alarm, be used to obtain tested point on the optical cable be used for fire alarm the time Current Temperatures output valve T that uses, it is characterized in that: may further comprise the steps:
Step 1: temperature difference threshold value T is set f
Step 2: n+1 the temperature data of tested point on optical cable that the intercepting distributed optical fiber temperature transducer system is gathered is designated as t in chronological order 0, t 1, t 2T n, t wherein nBe the current up-to-date temperature acquisition data of tested point on the optical cable;
Step 3: the first historical temperature-averaging value T that calculates tested point on the optical cable 1, the first historical temperature-averaging value T 1Be the current up-to-date temperature acquisition data t of tested point on the optical cable nThe mean value of the temperature data of n before, that is:
T &OverBar; 1 = t 0 + t 1 + t 2 + . . . t n - 1 n ;
Step 4: with the current up-to-date temperature acquisition data t of tested point on the optical cable nWith the first historical temperature-averaging value T 1Compare, if the current up-to-date temperature acquisition data t of tested point on the optical cable nWith the first historical temperature-averaging value T 1Difference less than temperature difference threshold value T f, that is: t n-T 1＜T f, then with the current up-to-date temperature acquisition data t of tested point on the optical cable nWeight orientate x as, wherein 1 &le; x &le; n 2 , And the Current Temperatures output valve T of tested point on the optical cable is output as:
T = T &OverBar; 1 &times; ( n + 1 - x ) + t n &times; x n + 1 ;
Step 5: if the current up-to-date temperature acquisition data t of tested point on the optical cable nWith the first historical temperature-averaging value T 1Difference more than or equal to temperature difference threshold value T f, that is: t n-T 1〉=T f, then with the current up-to-date temperature acquisition data t of tested point on the optical cable nWeight orientate y as, wherein n 2 < y < n , And the Current Temperatures output valve T of tested point on the optical cable is output as
T = T &OverBar; 1 &times; ( n + 1 - y ) + t n &times; y n + 1 .
As improvement, further comprising the steps of after described step 5:
Step 6: the tested point t that continues on optical cable nAfter new temperature acquisition data t is arranged N+1During arrival, calculate the second historical temperature-averaging value T of tested point on the optical cable 2, second of the tested point historical temperature-averaging value T on the optical cable 2Be the current up-to-date temperature acquisition data t of tested point on the optical cable N+1The mean value of the temperature data of n before, that is: T &OverBar; 2 = t 1 + t 2 + . . . t n - 1 + t n n ;
Step 7: if t n-T 1〉=T fAnd t N+1-T 2〉=T f, then the Current Temperatures output valve T with tested point on the optical cable is output as:
T = t n &times; ( n + 1 - y ) + t n + 1 &times; y n + 1 ;
Otherwise return step 3.
In order promptly to satisfy accuracy requirement, can arrive response speed faster again, the value of described n is 93～103 for good.
At this moment, the value of described x is 1, and the value of described y is 80 better.
Compared with prior art, the invention has the advantages that: after adopting said method, by taking different weight disposal routes to the bigger zone of temperature variation and other are regional, promptly for the not clear sensillary area territory of temperature, the weight of historical temperature-averaging value is bigger, can realize n time progressive mean like this, can satisfy accuracy requirement preferably, and for the temperature variation sensitizing range, the weight of historical temperature-averaging value is less, has realized response speed faster.And actual conditions according to fire-fighting, general constant temperature alarming value will be higher than 20 ℃ of environment temperatures, for temperature variation alarm region faster, though weaken to some extent on the precision, but such temperature accuracy can not exert an influence to actual alarm information, can meet the demands.
Description of drawings
Fig. 1 is the processing flow chart of the embodiment of the invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
The invention provides a kind of disposal route that is used for the distribution type optical fiber temperature measuring data of fire alarm, be used to obtain tested point on the optical cable be used for fire alarm the time Current Temperatures output valve T that uses, may further comprise the steps, referring to shown in Figure 1:
Step 1: temperature difference threshold value T is set f=8;
Step 2: 96 temperature datas of tested point on optical cable that the intercepting distributed optical fiber temperature transducer system is gathered are designated as t in chronological order 0, t 1, t 2T 95, t wherein 95Be the current up-to-date temperature acquisition data of tested point on the optical cable; Intercepting 96 temperature datas mainly considers to reduce amount of calculation under the situation that guarantees data precision;
Step 3: the first historical temperature-averaging value T that calculates tested point on the optical cable 1, the first historical temperature-averaging value T 1Be the current up-to-date temperature acquisition data t of tested point on the optical cable 95The mean value of 95 temperature datas before, that is:
T &OverBar; 1 = t 0 + t 1 + t 2 + . . . t 94 95 ;
Step 4: with the current up-to-date temperature acquisition data t of tested point on the optical cable 95With the first historical temperature-averaging value T 1Compare, if the current up-to-date temperature acquisition data t of tested point on the optical cable 95With the first historical temperature-averaging value T 1Difference less than temperature difference threshold value T f, that is: t 95-T 1＜8, then with the current up-to-date temperature acquisition data t of tested point on the optical cable 95Weight orientate 1 as, and the Current Temperatures output valve T of tested point on the optical cable is output as:
T = T &OverBar; 1 &times; 95 + t 92 &times; 1 96 ;
Step 5: if the current up-to-date temperature acquisition data t of tested point on the optical cable 95With the first historical temperature-averaging value T 1Difference more than or equal to temperature difference threshold value T f, that is: t 95-T 1〉=8, then with the current up-to-date temperature acquisition data t of tested point on the optical cable nWeight orientate 80 as, and the Current Temperatures output valve T of tested point on the optical cable is output as
T = T &OverBar; 1 &times; 16 + t 95 &times; 80 96 ;
Step 6: the tested point t that continues on optical cable 95After new temperature acquisition data t is arranged 96During arrival, calculate the second historical temperature-averaging value T of tested point on the optical cable 2, second of the tested point historical temperature-averaging value T on the optical cable 2Be the current up-to-date temperature acquisition data t of tested point on the optical cable 96The mean value of 95 temperature datas before, that is: T &OverBar; 2 = t 1 + t 2 + . . . t n - 1 + t 95 95 ;
Step 7: if t 95-T 1〉=8 and t 96-T 2〉=8, then the Current Temperatures output valve T with tested point on the optical cable is output as:
T = t 95 &times; 16 + t 96 &times; 80 96 ;
Otherwise return step 3, as a sequence, 96 the up-to-date temperature datas of tested point on optical cable that intercept again that distributed optical fiber temperature transducer system gathers are handled the temperature acquisition data again with all temperature acquisition data.

Claims (5)

1, a kind of disposal route that is used for the distribution type optical fiber temperature measuring data of fire alarm, be used to obtain tested point on the optical cable be used for fire alarm the time Current Temperatures output valve T that uses, it is characterized in that: may further comprise the steps:
Step 1: temperature difference threshold value T is set f
Step 2: n+1 the temperature data of tested point on optical cable that the intercepting distributed optical fiber temperature transducer system is gathered is designated as t in chronological order 0, t 1, t 2T n, t wherein nBe the current up-to-date temperature acquisition data of tested point on the optical cable;
Step 3: the first historical temperature-averaging value T that calculates tested point on the optical cable 1, the first historical temperature-averaging value T 1Be the current up-to-date temperature acquisition data t of tested point on the optical cable nThe mean value of the temperature data of n before, that is:
T 1 &OverBar; = t 0 + t 1 + t 2 + . . . t n - 1 n ;
Step 4: with the current up-to-date temperature acquisition data t of tested point on the optical cable nWith the first historical temperature-averaging value T 1Compare, if the current up-to-date temperature acquisition data t of tested point on the optical cable nWith the first historical temperature-averaging value T 1Difference less than temperature difference threshold value T f, that is: t n-T 1＜T f, then with the current up-to-date temperature acquisition data t of tested point on the optical cable nWeight orientate x as, wherein 1 &le; x &le; n 2 , And the Current Temperatures output valve T of tested point on the optical cable is output as:
T = T 1 &OverBar; &times; ( n + 1 - x ) + t n &times; x n + 1 ;
Step 5: if the current up-to-date temperature acquisition data t of tested point on the optical cable nWith the first historical temperature-averaging value T 1Difference more than or equal to temperature difference threshold value T f, that is: t n-T 1〉=T f, then with the current up-to-date temperature acquisition data t of tested point on the optical cable nWeight orientate y as, wherein n 2 < y < n , And the Current Temperatures output valve T of tested point on the optical cable is output as
T = T 1 &OverBar; &times; ( n + 1 - y ) + t n &times; y n + 1 .
2, the disposal route that is used for the distribution type optical fiber temperature measuring data of fire alarm according to claim 1 is characterized in that: further comprising the steps of after described step 5:
Step 6: the tested point t that continues on optical cable nAfter new temperature acquisition data t is arranged N+1During arrival, calculate the second historical temperature-averaging value T of tested point on the optical cable 2, second of the tested point historical temperature-averaging value T on the optical cable 2Be the current up-to-date temperature acquisition data t of tested point on the optical cable N+1The mean value of the temperature data of n before, that is: T 2 &OverBar; = t 1 + t 2 + . . . t n - 1 + t n n ;
Step 7: if t n-T 1〉=T fAnd t N+1-T 2〉=T f, then the Current Temperatures output valve T with tested point on the optical cable is output as:
T = t n &times; ( n + 1 - y ) + t n + 1 &times; y n + 1 ;
Otherwise return step 3.
3, the disposal route that is used for the distribution type optical fiber temperature measuring data of fire alarm according to claim 1 and 2 is characterized in that: the value of described n is 93～103.
4, the disposal route that is used for the distribution type optical fiber temperature measuring data of fire alarm according to claim 3 is characterized in that: the value of described x is 1.
5, the disposal route that is used for the distribution type optical fiber temperature measuring data of fire alarm according to claim 3 is characterized in that: the value of described y is 80.
CN2009100988566A 2009-05-17 2009-05-17 Treatment method of distribution type optical fiber temperature measuring data used for fire disaster alarm Expired - Fee Related CN101567117B (en)

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CN101936787A (en) * 2010-03-16 2011-01-05 宁波汉迪传感技术有限公司 Method for measuring reference signal in distributed optical fiber temperature sensor system
CN103606240A (en) * 2013-11-27 2014-02-26 宁波振东光电有限公司 Method for fire alarming through distributed type fiber optical temperature sensor system
CN104395942A (en) * 2012-06-21 2015-03-04 梦想四有限公司 Disaster early warning system for traditional wooden structures
CN104483038A (en) * 2014-12-09 2015-04-01 中国电建集团贵阳勘测设计研究院有限公司 Method for extracting temperature of target point in DTS optical fiber temperature-measuring host
CN105389961A (en) * 2015-11-04 2016-03-09 中国联合网络通信集团有限公司 Home safety early warning method and device
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CN101936787A (en) * 2010-03-16 2011-01-05 宁波汉迪传感技术有限公司 Method for measuring reference signal in distributed optical fiber temperature sensor system
CN104395942A (en) * 2012-06-21 2015-03-04 梦想四有限公司 Disaster early warning system for traditional wooden structures
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CN103606240B (en) * 2013-11-27 2016-06-29 宁波振东光电有限公司 Adopt the method that distributed optical fiber temperature transducer system carries out fire alarm
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CN109211429A (en) * 2017-07-03 2019-01-15 佛山市顺德区美的电热电器制造有限公司 Temperature sampling method, apparatus and cooking appliance
CN108414113A (en) * 2018-03-15 2018-08-17 山东微感光电子有限公司 The fire alarm system and method for fiber optic temperature are predicted with multi-point temperature coefficient of dispersion
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CN109781264B (en) * 2019-01-25 2021-08-13 华北电力大学（保定） Transformer optical fiber temperature measurement system and method
CN111047203A (en) * 2019-12-16 2020-04-21 江苏荣夏安全科技有限公司 Storage battery electrical fire monitoring method based on big data
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