CN108088585A - A kind of oil gas storage tank monitoring distribution type fiber-optic heat detector and control method - Google Patents
A kind of oil gas storage tank monitoring distribution type fiber-optic heat detector and control method Download PDFInfo
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- CN108088585A CN108088585A CN201810020899.1A CN201810020899A CN108088585A CN 108088585 A CN108088585 A CN 108088585A CN 201810020899 A CN201810020899 A CN 201810020899A CN 108088585 A CN108088585 A CN 108088585A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/324—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres using Raman scattering
Abstract
The invention discloses a kind of oil gas storage tank monitoring distribution type fiber-optic heat detectors, including the first measurement host, temperature sensing optical cable I, temperature sensing optical cable II and monitoring of software, first measurement host is equipped with 4 Measurement channels, temperature sensing optical cable I is drawn from the Measurement channel 1 of the first measurement host, successively along storage tank A1, storage tank A2 ..., storage tank An lay, and be back to the Measurement channel 2 of the first measurement host；Temperature sensing optical cable II is drawn from the Measurement channel 3 of the first measurement host, successively along storage tank B1, storage tank B2 ..., storage tank Bn lay, and be back to the Measurement channel 4 of the first measurement host；Monitoring of software obtains the working condition of the first measurement host and controls the Measurement channel of the first measurement host in real time.The present invention realizes the low cost of monitoring object, fast-response, highly reliable distributed on line monitoring by the laying of temperature sensing optical cable and the control of structure design, measurement host and Measurement channel.
Description
Technical field
The present invention relates to a kind of distribution type fiber-optic detectors, use and divide more particularly, to a kind of highly reliable oil gas storage tank monitoring
Cloth fiber temperature detector and control method.
Background technology
With China's economic sustained and rapid development, China has become the second-biggest-in-the-world oil consumption for being only second to the U.S.
State, strategic oil reserve have also become the most important link of national energy security system.With crude oil, finished product oilreserves
Increase, domestic large-scale oil depot, tank farm are more and more.Oil storage and transportation is always petrochemical industry department at different levels and enterprise's height safely
The problem of attention.
China mainly uses large floating roof oil tank oil storage in the petroleum filling built at present.Using secondary at the top of floating top oil tank
Sealing technique, but be not fully sealed, there are the possibility that a small amount of oil gas is leaked from sealing ring, and the oil gas of these leakages is too
Fire easily occurs in the case of the natures such as Yanggao County's temperature, lightning stroke.For liquefied natural gas, mainly using Spherical tank Storage, liquefied natural gas
The temperature of leak can be caused after leakage to be reduced, and is run into open fire and can be burnt even to generate and explodes.National standard《Petroleum filling is set
Count specification GB50737-2011》8.6.2, and should be according to disappearing clearly stipulate that should set auto fire-detection device on oil tank
The search coverage of fire extinguishing system interlink control requirement division fire detector.When using optical-fiber type heat detector, optical fiber
Heat detector should be arranged on oil tank floating plate secondary seal circle the upper surface of.At present, floating top oil tank fire monitoring is mainly using accurate point
The optical fiber grating temperature-measuring system of cloth, an oil tank are equipped with a set of optical fiber grating temperature-measuring system.Optical fiber grating temperature-measuring system is by believing
The compositions such as number (FBG) demodulator, fiber-optic grating sensor string and software, wherein fiber-optic grating sensor string are the modes using welding
It fiber-optical grating temperature sensor will be in series one by one, fiber-optical grating temperature sensor is usually to set one every 3m.
Region between two neighboring fiber-optical grating temperature sensor, is communication cable, and no sensing element belongs to monitoring blind area；In addition,
By expanding with heat and contract with cold and immersion is influenced, the reliability of fusion point is poor, be easy to cause fiber-optic grating sensor string fiber cut failure, portion
Divide and even all monitor regions missing；And the reliability of the signal (FBG) demodulator of optical fiber grating temperature-measuring system is poor, failure rate compared with
Height, once failure will cause entire oil gas storage tank monitoring missing.For oil gas storage tank application, the drawbacks of optical fiber grating temperature-measuring scheme
It is more apparent.
Distribution type fiber-optic heat detector is a kind of to utilize Raman scattering effect and optical time domain/frequency domain reflection principle design
Fiber temperature detector belongs to linear optical fiber heat detector of new generation, directly using optical fiber as sensor, without additional
Temperature element, can realize the Temperature Distribution formula measurement of upper any point along optical fiber, no measurement dead area, with quasi-distributed optical fiber
Grating temp measuring system is compared, and monitoring information is more abundant, and sensor is relatively reliable.Due to distribution type fiber-optic heat detector into
This is higher, in order to make full use of the performance of detector and reduce the monitoring cost of unit oil gas storage tank, it is necessary to increase distribution
The measurement distance and Measurement channel of fiber temperature detector.According to existing national standards, for the distribution type fiber-optic of fire protection warning
Heat detector highest can realize 4 passages, the technical specification of each passage 2.5km.Due to being profit between each Measurement channel
Tour inspection is carried out with the deeply concerned mode changed of opening the light, therefore for the distribution type fiber-optic heat detector of multiple Measurement channels, always
Time of measuring it is longer.Since the economic value of oil gas storage tank is high, significant, it is therefore desirable to temperature within the shortest time
It is abnormal to carry out detection alarm, and to the reliability of fiber temperature detector of oil gas storage tank monitoring and completeness requirement
It is high.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of low cost, fast-response, the monitoring of highly reliable oil gas storage tank
With distribution type fiber-optic heat detector and control method.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of oil gas storage tank monitoring distribution type fiber-optic
Heat detector, including the first measurement host, temperature sensing optical cable I, temperature sensing optical cable II and monitoring of software, first measurement host
Equipped with 4 Measurement channels；The temperature sensing optical cable I is drawn from the Measurement channel 1 of the first measurement host, successively along storage tank A1,
Storage tank A2 ..., storage tank An laying（n≥2）, and the end of the temperature sensing optical cable I is back to the survey of the first measurement host
Measure passage 2；The temperature sensing optical cable II is drawn from the Measurement channel 3 of the first measurement host, successively along storage tank B1, storage tank
B2 ..., storage tank Bn laying（n≥2）, and the end of the temperature sensing optical cable II is back to the measurement of the first measurement host and leads to
Road 4；The monitoring of software obtains the working condition of the first measurement host and controls the Measurement channel of the first measurement host in real time.
First measurement host uses spontaneous Raman scattering effect and optical time domain reflection（Or probe beam deflation）It is former
Reason design can monitor the Temperature Distribution of every bit along each Measurement channel temperature sensing optical cable automatically.The first measurement master
Machine includes laser light source, light-splitting device, detection circuit, data acquisition module and Multichannel photoswitch module, being capable of automatic collection
The Raman Back Scattering signal of each Measurement channel temperature sensing optical cable, calculates every bit along temperature sensing optical cable（Each oil gas storage tank）
Temperature Distribution, alarm decision is carried out to temperature anomaly, and obtains the length of each Measurement channel temperature sensing optical cable in real time.
Preferably, the temperature-sensitive element length of first measurement host is no more than 1m.According to the measurement of measurement host
Mechanism Study is analyzed, and the measurement temperature of measurement host every is equivalent to the temperature of all the points on a temperature-sensitive element length around the point
Spend average value, if the length of temperature overheating point is smaller, measurement host the point measurement temperature by relatively low in actual temperature.
For conventional fire-fighting application, the temperature-sensitive element length requirement of measurement host must not exceed 3m, and the temperature-sensitive element length standard is to handing over
The wider local applicabilities of fire behaviors area such as logical tunnel, subway are preferable；But for oil gas storage tank fire monitoring, initial stage is small fire
Seedling or small leak, it is necessary to fire behavior could be found using the measurement host of small temperature-sensitive element length at the first time, accomplished
In time, accurate alarm gains time for fire behavior disposal.
Preferably, the temperature sensing optical cable uses all-metal cable configuration, temperature sensing optical fiber, seamless is followed successively by from inside to outside
Steel pipe and stainless steel wire stranded layer.The temperature sensing optical cable except having higher tension, compression strength, also with high temperature resistant,
The advantages that corrosion resistance, non-aging, work progress are not likely to produce electrostatic, easy for construction, reliability higher, and because metal
Heat transfer it is fast, the temperature sensing optical cable can be changed with quick response ambient temperature, be improved to oil gas storage tank temperature（Fire behavior/let out
Leakage）The response speed of detection.
Further, the temperature sensing optical cable is also filled with heat conduction silicone oil in seamless steel pipe, and temperature sensing optical fiber passes through heat conduction
Silicone oil and seamless steel pipe contact, further promote response of the temperature-sensitive cable interior temperature sensing optical fiber to ambient temperature.
The outer diameter of the temperature sensing optical cable is 2mm ~ 8mm.The outer diameter of temperature sensing optical cable is smaller, faster to extraneous temperature-responsive,
But strengths in tension and compression is poor, production cost is high.According to our application experiences in actual items, it is suitble to outdoor mounted construction
And the outer diameter of the faster temperature sensing optical cable of response speed is preferably arranged to 2mm ~ 8mm.
There are two types of the cable configurations of type to form for the temperature sensing optical cable, on storage tank/storage tank between adjacent storage
Temperature sensing optical cable uses all-metal cable configuration, and the temperature sensing optical cable at remaining position is using conventional multicore communication cable structure.Due to storage
Tank is emphasis monitoring object, i.e. temperature sensing optical cable on storage tank is as temperature-sensing element（Certainly also it is simultaneously transmission medium）, because
The structure of temperature sensing optical cable on this storage tank will use reliability height, the all-metal cable configuration of fast response time；And it is led from measurement
Machine is back to the position of measurement host to the position of storage tank A1, B1 and from storage tank An, Bn, is not emphasis monitoring object, temperature-sensitive
Optical cable is more used as transmission medium, therefore selects multicore communication cable structure, tank area again with each all-metal temperature sensing optical cable
It mutually continues, optical cable cost can be reduced, be also convenient for optical cable construction.
Preferably, a kind of oil gas storage tank monitoring distribution type fiber-optic heat detector, including the first measurement host, temperature-sensitive
Optical cable I, temperature sensing optical cable II and monitoring of software further include the second measurement host, temperature sensing optical cable III and temperature sensing optical cable IV, the sense
Warm optical cable III is drawn from the Measurement channel 1 of the second measurement host, successively along storage tank B1, storage tank B2 ..., storage tank Bn lay,
And the end of the temperature sensing optical cable III is back to the Measurement channel 2 of the second measurement host；The temperature sensing optical cable IV is from
The Measurement channel 3 of two measurement hosts is drawn, successively along storage tank A1, storage tank A2 ..., storage tank An lay, and the sense
The end of warm optical cable IV is back to the Measurement channel 4 of the second measurement host；The monitoring of software obtains the first measurement master in real time
Machine, the working condition of the second measurement host and the first measurement host of control, the Measurement channel of the second measurement host.
The present invention also provides a kind of control methods of oil gas storage tank monitoring distribution type fiber-optic heat detector, it includes
Following steps：
（1）Monitoring software controls the first measurement host, the second measurement host to open Measurement channel 1, remaining Measurement channel is not opened
It opens；
（2）Temperature Distribution and length along the real-time acquisition temperature sensing optical cable I of monitoring software control, temperature sensing optical cable III；
（3）Monitoring of software carries out equipment fault judgement, and step is carried out if no equipment fault（4）, if it find that the first measurement
A certain measurement host in host, the second measurement host generates equipment fault, except the display device failure on monitoring of software
Outside warning message, another measurement host is also controlled to open Measurement channel 3, remaining Measurement channel is not turned on, another at this time survey
The Measurement channel 1 of host and the switch operating in turn of Measurement channel 3 are measured, until equipment fault releases；
（4）Monitoring of software carries out fiber cut failure judgement, repeats step if no fiber cut failure（1）, if it find that temperature-sensitive
A certain temperature sensing optical cable in optical cable I, temperature sensing optical cable III generates fiber cut failure, except showing that fiber cut failure is alarmed on monitoring of software
Information is with outside disconnected fine position, also controlling the measurement host corresponding to the temperature sensing optical cable to open Measurement channel 1 and Measurement channel successively
2, remaining Measurement channel is not turned on, at this time the Measurement channel 1 of the measurement host and Measurement channel 2 switch operating in turn, until setting
Standby trouble shooting；And monitoring of software can also as needed automatically splice the temperature profile data T (2, z) of Measurement channel 2
The temperature profile data T (1, z) for Measurement channel 1 is handled, T (1, L-z)=T (2, z), wherein L is temperature sensing optical cable I or sense
The length of warm optical cable III, z for certain point on certain point distance of the first measurement host of distance on temperature sensing optical cable I or temperature sensing optical cable III away from
With a distance from the second measurement host.
For distribution type fiber-optic heat detector as a kind of distributed temperature measuring means, no monitoring blind area, technical advantage are notable.This
Invention by the laying of temperature sensing optical cable and the control of structure design, measurement host and Measurement channel, realize monitoring object it is low into
Sheet, fast-response, highly reliable distributed on line monitoring.The first and last end of temperature sensing optical cable is connected with measurement host, under normal circumstances,
Measurement host only opens Measurement channel 1, obtains Temperature Distribution and length along temperature sensing optical cable in real time, and in time to abnormal feelings
Condition is alarmed.If fiber cut failure occurs in optical cable certain point, it is logical that monitoring of software can control measurement host to open measurement successively
Road 1,2, switches in turn, will not cause monitoring region missing, and enough time is reserved for the exclusion of temperature sensing optical cable fiber cut failure.Furthermore
There are two independent temperature sensing optical cables above each oil gas storage tank, so if many places fiber cut failure occurs in temperature sensing optical cable, also not
It can cause monitoring region missing.Furthermore it is preferred that using double measurement hosts, this two measurement hosts backup each other, any survey
It measures host to break down, monitoring of software can control another measurement host to open Measurement channel 1,3 successively, in turn switch, will not
Monitoring region missing is caused, enough time is reserved for measurement host troubleshooting.
Compared with prior art, advantages of the present invention has：1st, it is inexpensive：One measurement host can monitor multiple oil simultaneously
Gas storage tank gives full play to the advantage of distribution type fiber-optic heat detector far measuring distance, effectively reduces the prison of single oil gas storage tank
Survey cost；2nd, fast-response：By filling heat conduction silicone oil in all-metal temperature sensing optical cable structure design and seamless pipe, can substantially carry
Response of the high temperature sensing optical cable to ambient temperature, and controlled by rational Measurement channel, reduce the measurement of all oil gas storage tanks
Time；3rd, it is highly reliable：The temperature sensing optical cable of the present invention, measurement host have multiple Hot Stand-By solution, and redundancy is high, and single failure is equal
Monitoring region missing will not be caused, enough time is reserved for troubleshooting.
Description of the drawings
Fig. 1 is a kind of oil gas storage tank monitoring distribution type fiber-optic heat detector structure diagram of the present invention.
Fig. 2 is a kind of cross-sectional view of temperature sensing optical cable structure of the present invention.
Fig. 3 is a kind of oil gas storage tank monitoring two-node cluster hot backup distribution type fiber-optic heat detector structural representation of the present invention
Figure.
Fig. 4 is a kind of basic procedure of oil gas storage tank monitoring distribution type fiber-optic heat detector control method of the present invention
Figure.
Specific embodiment
The present invention is described in further detail below in conjunction with attached drawing embodiment.
Embodiment 1：
As shown in Figure 1, a kind of oil gas storage tank monitoring distribution type fiber-optic heat detector, including the first measurement host, temperature-sensitive light
Cable I, temperature sensing optical cable II and monitoring of software, the first measurement host are equipped with 4 Measurement channels；Temperature sensing optical cable I is from the first measurement host
Measurement channel 1 draw, successively along storage tank A1, storage tank A2 ..., storage tank An lay（n≥2）, and the end of temperature sensing optical cable I
End is back to the Measurement channel 2 of the first measurement host；Temperature sensing optical cable II is drawn from the Measurement channel 3 of the first measurement host, successively
Along storage tank B1, storage tank B2 ..., storage tank Bn laying（n≥2）, the end of temperature sensing optical cable II is back to the first measurement host
Measurement channel 4；Monitoring of software obtains the working condition of the first measurement host and controls the Measurement channel of the first measurement host in real time.
In the present embodiment, the first measurement host of selection is set using spontaneous Raman scattering effect and optical time domain reflection principle
Meter, technical specification are：Measurement channel is 4 passages, be 2500m per channel measurement length, time of measuring 2s, temperature-sensitive unit it is long
1m is spent, is capable of the Raman Back Scattering signal of each Measurement channel temperature sensing optical cable of automatic collection, calculates every along temperature sensing optical cable
A bit（Each oil gas storage tank）Temperature Distribution, alarm decision is carried out to temperature anomaly, and obtains each Measurement channel sense in real time
The length of warm optical cable.In the present embodiment, storage tank is floating roof crude oil storage tank, diameter about 80m, I, II point of temperature sensing optical cable outside 100,000 sides
It Jian Ce not 4 crude oil storage tanks（n=4）, and temperature sensing optical cable I, II is laid along crude oil storage tank secondary seal astragal type, Mei Geyuan
Temperature sensing optical cable length about 250m needed for oil tank, 4 crude oil storage tanks add up to about 1000m, it is contemplated that along crude oil storage tank above and below with
And the temperature sensing optical cable length between storage tank, needed for storage tank to equipment room（It draws from the first measurement host, is returned after storage tank is laid
To the first measurement host, whole process uses the temperature sensing optical cable of same specification）, the total length about 2000m of required temperature sensing optical cable I, II,
It is not above the technical specification of the first measurement host.
Since the economic value of crude oil storage tank is high, to realize the variation of quick response ambient temperature, temperature sensing optical cable I, II uses
All-metal cable configuration is twisted as shown in Fig. 2, being followed successively by temperature sensing optical fiber 101, seamless steel pipe 102 and stainless steel wire from inside to outside
Layer 103.The temperature sensing optical cable of all-metal cable configuration is except having higher tension, compression strength, also with high temperature resistant, corrosion-resistant
The advantages that property, non-aging, work progress are not likely to produce electrostatic, easy for construction, reliability higher.Preferably, temperature-sensitive
Optical cable is also filled with heat conduction silicone oil 104 in seamless steel pipe, and temperature sensing optical fiber 101 is connect by heat conduction silicone oil 104 and seamless steel pipe 102
It touches, further promotes 101 response to ambient temperature of temperature sensing optical fiber of temperature-sensitive cable interior.In the present embodiment, temperature sensing optical fiber 101 is
A diameter of 1.35mm of GI62.5/125/250 optical fiber, seamless steel pipe 102, stainless steel wire stranded layer 103 use 7 diameters
The stainless steel wire of 1.0mm, the outer diameter of temperature sensing optical cable is about 3.45mm.
Monitoring of software obtains the working condition of the first measurement host in real time.Under normal circumstances, monitoring of software opens successively
The Measurement channel 1 of one measurement host and Measurement channel 3, each channel measurement time are 2s, complete 8 crude oil storage tanks and all monitor
Required time is 4s, and the monitoring of each storage tank is completed with less poll time；Once it was found that there is disconnected fine event in temperature sensing optical cable
Barrier assumes the fracture of the about 300m of temperature sensing optical cable I places in the present embodiment, then monitoring of software is opened the measurement of the first measurement host and led to successively
The measurement length about 300m of road 1, Measurement channel 2 and Measurement channel 3, at this time Measurement channel 1, the measurement length of Measurement channel 2 is about
2000-300=1700m, the measurement length about 2000m of Measurement channel 3, cover the monitoring of all 8 crude oil storage tanks, and no monitoring is blind
Area, and complete the time required to 8 crude oil storage tanks all monitor to be 6s.Monitoring of software can also be automatically logical by measurement as needed
Temperature profile data T (2, the z) splicing in road 2 is the temperature profile data T (1, z) of Measurement channel 1, and processing formula is T
(1, L-z)=T (2, z), wherein L are the length of temperature sensing optical cable I, and z is certain point first measurement host of distance on temperature sensing optical cable I
Temperature of the Measurement channel 1 apart from bigger place before the temperature of distance, i.e. Measurement channel 2 apart from smaller place corresponds to fracture
Degree is conducive to monitoring of software by the splicing of temperature data and carries out storage tank monitoring visualization display.
Embodiment 2：
As shown in figure 3, a kind of oil gas storage tank monitoring two-node cluster hot backup distribution type fiber-optic heat detector, including the first measurement master
Machine, the second measurement host, temperature sensing optical cable I, temperature sensing optical cable II, temperature sensing optical cable III, temperature sensing optical cable IV and monitoring of software；First measurement
Host is equipped with 4 Measurement channels；Temperature sensing optical cable I is drawn from the Measurement channel 1 of the first measurement host, successively along storage tank A1, storage
Tank A2 ..., storage tank An laying（n≥2）, and the end of temperature sensing optical cable I is back to the Measurement channel 2 of the first measurement host；
Temperature sensing optical cable II is drawn from the Measurement channel 3 of the first measurement host, successively along storage tank B1, storage tank B2 ..., storage tank Bn lay
（n≥2）, the end of temperature sensing optical cable II is back to the Measurement channel 4 of the first measurement host；Second measurement host is equipped with 4 measurements
Passage；Temperature sensing optical cable III is drawn from the Measurement channel 1 of the second measurement host, successively along storage tank B1, storage tank B2 ..., storage tank
Bn is laid, and the end of temperature sensing optical cable III is back to the Measurement channel 2 of the second measurement host；Temperature sensing optical cable IV is from the second measurement host
Measurement channel 3 draw, successively along storage tank A1, storage tank A2 ..., storage tank An lay, the end of temperature sensing optical cable IV is back to
The Measurement channel 4 of second measurement host；Monitoring of software obtains the first measurement host, the working condition of the second measurement host simultaneously in real time
Control the first measurement host, the Measurement channel of the second measurement host.
In the present embodiment, the first measurement host of selection, the second measurement host technical specification are：Measurement channel is logical for 4
Road, every channel measurement length are 2500m, time of measuring 2s, temperature-sensitive element length 1m.In the present embodiment, storage tank is 1000 sides
LNG spherical tanks, every temperature sensing optical cable monitor 8 crude oil storage tanks respectively（n=8）, and temperature sensing optical cable is applied along spherical tank perficial helical
If each spherical tank is laid with two temperature sensing optical cables simultaneously（Temperature sensing optical cable I, IV or II, III）, temperature sensing optical cable needed for each spherical tank
Length about 100 × 2=200m, 8 spherical tanks add up to about 800 × 2=1600m, are applied to save temperature sensing optical cable cost and reduce optical cable
Work difficulty uses all-metal cable configuration above and below and between spherical tank along spherical tank, and structure is similar to Example 1, and Spherical Tank Area is extremely
Equipment room uses 8 core GYXTW communication cable structures（Length about 500m）, in Spherical Tank Area 8 core GYXTW communication cables of entrance respectively with
The first and last end phase welding of all-metal temperature sensing optical cable I, II, III, IV, the first measurement host, the second measurement host each measure at this time
The length of passage about 2200m is not above the technical specification of measurement host.
As different from Example 1, each spherical tank is laid with two temperature sensing optical cables, and this two simultaneously in the present embodiment
Temperature sensing optical cable connects different measurement hosts respectively, and what it is such as spherical tank A1 ~ A8 layings is temperature sensing optical cable I and IV, and spherical tank B1 ~ B8 is laid
Be temperature sensing optical cable II and III, laid by dual temperature sensing optical cable, two measurement hosts are set, can realize two-node cluster hot backup,
Reliability higher.With reference to the present embodiment, the control method of distribution type fiber-optic heat detector is illustrated：
（1）Monitoring software controls the first measurement host, the second measurement host to open Measurement channel 1, remaining Measurement channel is not opened
It opens；Since a measurement host only opens 1 passage, poll time is short, convenient for noting abnormalities at the first time；
（2）First measurement host gathers the signal of temperature sensing optical cable I in real time, the signal of the real-time temperature sensing optical cable III of the second measurement host,
Temperature Distribution and length along the real-time acquisition temperature sensing optical cable I of monitoring software control, temperature sensing optical cable III, realize spherical tank A1 respectively
The on-line monitoring of ~ A8, B1 ~ B8, and the time cycle of all spherical tanks monitoring is 2s（It is most short）；
（3）Monitoring of software carries out equipment fault judgement, and step is carried out if no measurement host equipment fault（4）, if it find that
A certain measurement host in first measurement host, the second measurement host generates equipment fault, present embodiment assumes that the first measurement
Host generates equipment fault, in addition to the display device fault alarm information on monitoring of software, the second measurement host is also controlled to open
Measurement channel 3 is opened, remaining Measurement channel is not turned on, and the Measurement channel 1 of the second measurement host and Measurement channel 3 switch in turn at this time
Work gathers temperature sensing optical cable III, the signal of temperature sensing optical cable IV in turn, realizes spherical tank A1 ~ A8, the on-line monitoring of B1 ~ B8, and institute
It is 4s to have the time cycle that spherical tank monitors（It is most long）, until the equipment fault of the first measurement host releases；
（4）Monitoring of software carries out fiber cut failure judgement, repeats step if no fiber cut failure（1）, if it find that temperature-sensitive
A certain temperature sensing optical cable in optical cable I, temperature sensing optical cable III generates fiber cut failure, assumes that temperature sensing optical cable I is broken in the present embodiment, then supervises
Survey software open successively the first measurement host Measurement channel 1 and Measurement channel 2 and open the second measurement host open measurement
Passage 1 realizes spherical tank A1 ~ A8, the on-line monitoring of B1 ~ B8, and the time cycle of spherical tank A1 ~ A8 monitorings is 4s, spherical tank B1 ~ B8
The time cycle of monitoring is 2s, until the fiber cut failure of temperature sensing optical cable I releases.
The foregoing is merely presently preferred embodiments of the present invention, should not be construed as limiting the scope of the invention.It is all
Within the spirit and principles in the present invention, any type of deformation done, equivalent substitution, improvement etc. should be included in the present invention's
Within protection domain.
Claims (9)
1. a kind of oil gas storage tank monitoring distribution type fiber-optic heat detector, including the first measurement host, temperature sensing optical cable I, temperature-sensitive
Optical cable II and monitoring of software, it is characterised in that first measurement host is equipped with 4 Measurement channels；The temperature sensing optical cable I
Drawn from the Measurement channel 1 of the first measurement host, successively along storage tank A1, storage tank A2 ..., storage tank An lay, it is and described
The end of temperature sensing optical cable I be back to the Measurement channel 2 of the first measurement host；The temperature sensing optical cable II is from the first measurement host
Measurement channel 3 draw, successively along storage tank B1, storage tank B2 ..., storage tank Bn lay, and the temperature sensing optical cable II
End is back to the Measurement channel 4 of the first measurement host；The monitoring of software obtains the work shape of the first measurement host in real time
State and the Measurement channel for controlling the first measurement host.
2. a kind of oil gas storage tank monitoring distribution type fiber-optic heat detector as described in claim 1, it is characterised in that described
The first measurement host use spontaneous Raman scattering effect and optical time domain reflection（Or probe beam deflation）Principle designs, can be certainly
The Temperature Distribution of every bit along the dynamic each Measurement channel temperature sensing optical cable of monitoring.
3. a kind of oil gas storage tank monitoring distribution type fiber-optic heat detector as described in claim 1, it is characterised in that described
The first measurement host temperature-sensitive element length be no more than 1m.
4. a kind of oil gas storage tank monitoring distribution type fiber-optic heat detector as described in claim 1, it is characterised in that described
Temperature sensing optical cable using all-metal cable configuration, be followed successively by temperature sensing optical fiber, seamless steel pipe and stainless steel wire stranded layer from inside to outside.
A kind of 5. oil gas storage tank monitoring distribution type fiber-optic heat detector as described in claim 1 or 4, it is characterised in that institute
The temperature sensing optical cable stated is also filled with heat conduction silicone oil in seamless steel pipe.
A kind of 6. oil gas storage tank monitoring distribution type fiber-optic heat detector as described in claim 1 or 4, it is characterised in that institute
The outer diameter for the temperature sensing optical cable stated is 2mm ~ 8mm.
7. a kind of oil gas storage tank monitoring distribution type fiber-optic heat detector as described in claim 1, it is characterised in that described
Temperature sensing optical cable there are two types of the cable configurations of type to form, on storage tank/storage tank on temperature sensing optical cable between adjacent storage use
All-metal cable configuration, the temperature sensing optical cable at remaining position is using conventional multicore communication cable structure.
8. a kind of oil gas storage tank monitoring distribution type fiber-optic heat detector as described in claim 1, it is characterised in that also wrap
The second measurement host, temperature sensing optical cable III and temperature sensing optical cable IV are included, the measurement of temperature sensing optical cable III from second measurement host is led to
Road 1 is drawn, successively along storage tank B1, storage tank B2 ..., storage tank Bn lay, and the temperature sensing optical cable III end return
To the Measurement channel 2 of the second measurement host；The temperature sensing optical cable IV is drawn from the Measurement channel 3 of the second measurement host, successively
Along storage tank A1, storage tank A2 ..., storage tank An layings, and the end of the temperature sensing optical cable IV is back to the second measurement master
The Measurement channel 4 of machine；The monitoring of software obtains the first measurement host, the working condition of the second measurement host and control in real time
The Measurement channel of first measurement host, the second measurement host.
9. a kind of control method of the oil gas storage tank monitoring distribution type fiber-optic heat detector described in usage right requirement 1 or 8,
It is characterized in that it comprises the following steps：
（1）Monitoring software controls the first measurement host, the second measurement host to open Measurement channel 1, remaining Measurement channel is not opened
It opens；
（2）Temperature Distribution and length along the real-time acquisition temperature sensing optical cable I of monitoring software control, temperature sensing optical cable III；
（3）Monitoring of software carries out equipment fault judgement, and step is carried out if no equipment fault（4）, if it find that the first measurement
A certain measurement host in host, the second measurement host generates equipment fault, except the display device failure on monitoring of software
Outside warning message, another measurement host is also controlled to open Measurement channel 3, remaining Measurement channel is not turned on, another at this time survey
The Measurement channel 1 of host and the switch operating in turn of Measurement channel 3 are measured, until equipment fault releases；
（4）Monitoring of software carries out fiber cut failure judgement, repeats step if no fiber cut failure（1）, if it find that temperature-sensitive
A certain temperature sensing optical cable in optical cable I, temperature sensing optical cable III generates fiber cut failure, except showing that fiber cut failure is alarmed on monitoring of software
Information is with outside disconnected fine position, also controlling the measurement host corresponding to the temperature sensing optical cable to open Measurement channel 1 and Measurement channel successively
2, remaining Measurement channel is not turned on, at this time the Measurement channel 1 of the measurement host and Measurement channel 2 switch operating in turn, until setting
Standby trouble shooting；And monitoring of software can also as needed automatically splice the temperature profile data T (2, z) of Measurement channel 2
The temperature profile data T (1, z) for Measurement channel 1 is handled, T (1, L-z)=T (2, z), wherein L is temperature sensing optical cable I or sense
The length of warm optical cable III, z for certain point on certain point distance of the first measurement host of distance on temperature sensing optical cable I or temperature sensing optical cable III away from
With a distance from the second measurement host.
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