CN108305429A - A kind of tunnel fire detection system and its fiber grating detector - Google Patents
A kind of tunnel fire detection system and its fiber grating detector Download PDFInfo
- Publication number
- CN108305429A CN108305429A CN201810080292.2A CN201810080292A CN108305429A CN 108305429 A CN108305429 A CN 108305429A CN 201810080292 A CN201810080292 A CN 201810080292A CN 108305429 A CN108305429 A CN 108305429A
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- humidity
- temp
- sensing element
- wiper
- tunnel
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
-
- 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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/18—Prevention or correction of operating errors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
The invention discloses a kind of tunnel fire detection system and its fiber grating detector, the fiber grating detector, including temp-sensing element, further include, humidity sensor, for the ambient humidity of environment where detecting the temp-sensing element, output represents the Humidity Detection signal of ambient humidity；Wiper, for striking off the droplet on temp-sensing element；Processor, it is connect with the humidity sensor and wiper signal, Humidity Detection signal for receiving humidity sensor, the ambient humidity that Humidity Detection signal is represented is compared with preset humidity limit value, if ambient humidity is more than humidity limit value, then under the ambient humidity, according to the relationship of preset ambient humidity and wiper initiation culture, wiper is started with the corresponding initiation culture of the ambient humidity.Environment temperature is detected by humidity sensor, the initiation culture of wiper is controlled according to ambient humidity, in time scrape off water when there is water on temp-sensing element, the influence that the temperature detection of temp-sensing element lags is caused with the water reduced on temp-sensing element.
Description
Technical field
The present invention relates to fire detecting system, more particularly to a kind of tunnel fire detection system and its fiber grating detection
Device.
Background technology
In recent years, as the Chinese government constantly reinforces in infrastructure investment, traffic tunnel welcome one it is fast
The stage of speed development.However, at the same time, tunnel fire hazard occurrence frequency gradually increases, people's security of the lives and property is seriously threatened.
Since traffic tunnel has the characteristics that environment closing, fire are unfavorable for the diffusion of the heat of flue dust when occurring, this causes personnel to dredge
It is serious to dissipate difficulty, fire fighting difficulty, fire extent of the destruction.So how effectively to be taken precautions against traffic tunnel fire, ensure to hand over
Logical tunnel security against fire has become the concern project of domestic and international fire-fighting circle.
In the prior art, Authorization Notice No. is that the Chinese patent of CN205621211U discloses a kind of tunnel safety device,
More particularly to a kind of tunnel Fire-alarming System based on Fibre Optical Sensor, including temperature sensing optical cable, alarm and foam jet component,
Temperature sensing optical cable is fixed in tunnel side by side by fixation kit, and temperature sensing optical cable one end is correspondingly arranged light source, and the other end passes through optical fiber
Adapter is in turn connected to transmission main cable and (FBG) demodulator input terminal, (FBG) demodulator output end are connected to control unit, control unit
It is connected to alarm and foam jet component, control unit is connected with monitor supervision platform simultaneously, and foam jet component is along temperature sensing optical cable
Extending direction setting is several.When fire occurs in tunnel for the utility model, can to tunnel fire location carry out Rapid Alarm with
It puts out a fire to save life and property, sensing capabilities are reliable.
Authorization Notice No. is that the Chinese patent of CN205428116U discloses a kind of fire detecting system, belongs to fire-fighting equipment
A kind of field, and in particular to temperature detected by optical fiber fire detecting system for vcehicular tunnel.Including：Steel positioned at vcehicular tunnel top
Rope, the optical fiber and grating sensing temperature detector being fixed on the cable wire, wherein：The optical fiber and grating sensing temperature detector is by transmitting light
Cable is connected with signal processor.Therefore, which has the following advantages that：1. reasonable design, simple in structure, at low cost and complete reality
With；2. the response time is short, accuracy of detection is high, and the influence of range length not monitored；3. measurement result has good repetition
Property, long-time stability are good.
Authorization Notice No. is that the Chinese patent of CN101571983B discloses a kind of fire disaster automatically in fiber gating tunnel alarm
And the method and device of positioning, this method include：Probe string is mounted on tunnel top along length of tunnel direction；Fire occurs
When, each optical fiber grating temperature probe acquires the temperature of belonging positions in real time, and real time information is transmitted to optical fiber light by optical fiber
Grid temperature sensing measuring instrument；Fiber grating temperature sensor measuring instrument records temperature data calculates heating rate data, and deposits
It is stored in database；When detected temperature or heating rate meet or exceed preset value, then alarm；After alarm, from number
It pops one's head according to all temperature datas, heating rate data and the corresponding optical fiber grating temperature between first 1~n seconds of extraction alarm in library
Physical location data determines the physical location for the optical fiber grating temperature probe that fire early period of origination heats up most fast, the physical location
The physical location of corresponding ignition point, thus completes fire alarm and positioning.The advantages of invention is to effectively improve fire report
Alert reliability.
The tunnel Fire-alarming System of these above-mentioned Fibre Optical Sensors passes through the temp-sensing element of fiber grating temperature detector
Droplet may be accumulated since ambient humidity is larger in tunnel especially on the rainy day, temp-sensing element by carrying out temperature detection, if
Droplet is accumulated on temp-sensing element, then when the environment temperature heating of its detection is very fast, ring is warming up to since the specific heat capacity of water is larger
Border temperature needs to absorb more heats, so the environment temperature that will be lagged behind in tunnel of the temperature of temp-sensing element detection,
When fire occurs, then it can extend the reaction time of fire alarm.
Invention content
The purpose of the present invention one is to provide a kind of fiber grating detector, weakens and is coagulated on fiber grating temperature detector
The droplet of knot delays the harmful effect in environment temperature to fiber grating temperature detector detection temperature.
The present invention above-mentioned technical purpose one technical scheme is that：
A kind of fiber grating detector, including temp-sensing element further include：Humidity sensor, for detecting the temp-sensing element institute
In the ambient humidity of environment, output represents the Humidity Detection signal of ambient humidity；
Wiper, for striking off the droplet on temp-sensing element；Processor is connect with the humidity sensor and wiper signal,
Humidity Detection signal for receiving humidity sensor, the ambient humidity that Humidity Detection signal is represented and preset humidity limit value
Comparison under the ambient humidity, starts frequency if ambient humidity is more than humidity limit value according to preset ambient humidity and wiper
The relationship of rate starts wiper with the corresponding initiation culture of the ambient humidity.
By using above-mentioned technical proposal, when the environment temperature of humidity sensor detection is more than humidity limit value, wiper
Temp-sensing element will be carried out to scrape water with the ambient humidity corresponding initiation culture startup, to timely when there is water on temp-sensing element
Water is scraped off, the influence that the temperature detection of temp-sensing element lags is caused with the water reduced on temp-sensing element.
Further, the relationship according to preset ambient humidity and the initiation culture of wiper, with the ambient humidity
Corresponding initiation culture starts wiper, specially：It is multiple described in the processor in preset multiple continuous humidity ranges
Temperature range one-to-one correspondence has preset initiation culture, the ambient humidity that processor is exported according to humidity sensor to judge environment
Humidity range where humidity selects the corresponding initiation culture of the humidity range to start wiper.
Further, the wiper includes push-rod electric machine and scrapes water ring, and the push-rod electric machine includes motor and and motor
The push rod of connection scrapes water ring described in end connection of the push rod far from motor, and the water ring sliding sleeve of scraping is set to the warming
On element.
By using above-mentioned technical proposal, motor driving push rod makes to scrape water ring and scrapes off warming in temp-sensing element reciprocating motion
Water on element.
Further, the wiper further includes pedestal, the pedestal fix the motor and make the motor with it is described
Temp-sensing element keeps certain distance.
By using above-mentioned technical proposal, motor is held away from the position on temp-sensing element by pedestal, avoids motor work
The detection of temperature interference temp-sensing element when making.
The purpose of the present invention two is to provide a kind of fiber grating detector, weakens and is coagulated on fiber grating temperature detector
The droplet of knot delays the harmful effect in environment temperature to fiber grating temperature detector detection temperature, when making generation fire, fire
Calamity detection can be more rapid.
The present invention above-mentioned technical purpose two technical scheme is that：
A kind of tunnel fire detection system, including fiber grating detector further include L bracket, steel hinge rope, Optical hanger, light
The arc top in cable, the L bracket and tunnel connects, and the steel hinge rope is set to the lower end of the L bracket along length of tunnel direction,
The Optical hanger is set on steel hinge rope, and the optical cable connects the temp-sensing element and on the Optical hanger.
By using above-mentioned technical proposal, the installation of fiber grating detector and optical cable is realized, fiber grating is made to detect
The temperature of device detection is transmitted.
Further, the L bracket is connected by the arc top in expansion bolt and tunnel.
By using above-mentioned technical proposal, collided gudgeon keeps L bracket installation more firm.
Further, the system also includes fiber Bragg grating signal processor, the fiber Bragg grating signal processor provides
The output end of scanning light source is connected with the input terminal of the optical cable, the output end of the optical cable and the fiber grating signal processing
The signal input part of device is connected, and the fiber Bragg grating signal processor is also connect with the fire alarm control unit signal.
By using above-mentioned technical proposal, the both ends of optical cable and the output end of fiber Bragg grating signal processor and input terminal connect
It connects, the output of scanning light source output end makes fiber Bragg grating signal processor realize to tunnel by returning to input terminal after temp-sensing element
The display of environment temperature, and when temperature is higher than preset temperature limit, start fire alarm control unit.
Further, it is provided with optical branching between the output end of the fiber Bragg grating signal processor and optical cable input terminal
Device, the optical branching device can connect multiple optical cables.
By using above-mentioned technical proposal, scanning light source is dispersed into multiple branch light sources by optical branching device, makes more optical cables
It can be detected using branch light source.
Further, the system also includes the manual pull station being arranged in tunnel-side, the manual pull stations
It is connect with the fire alarm control unit signal.
By using above-mentioned technical proposal, fire alarm control unit can be manually booted.
Further, the processor and the humidity sensor are abutted against set on tunnel arc at the position of nearly temp-sensing element.
By using above-mentioned technical proposal, humidity sensor enables humidity sensor to detect warming close to temp-sensing element
The humidity of element near zone.
In conclusion the invention has the advantages that：Environment temperature is detected by humidity sensor, according to environmental wet
It spends to control the initiation culture of wiper, in time scrape off water when there is water on temp-sensing element, to reduce on temp-sensing element
Water cause the influence that the temperature detection of temp-sensing element lags.
Description of the drawings
Fig. 1 is the overall structure diagram of the embodiment of the present invention one；
Fig. 2 is the first viewing angle constructions schematic diagram of the embodiment of the present invention two；
Fig. 3 is the system principle diagram of the embodiment of the present invention two；
Fig. 4 is the second viewing angle constructions schematic diagram of the embodiment of the present invention two, focuses on the position of displaying manual pull station.
In figure, 1, temp-sensing element；2, humidity sensor；3, wiper；31, push-rod electric machine；32, water ring is scraped；311, motor；
312, push rod；33, pedestal；4, L bracket；5, steel hinge rope；6, Optical hanger；7, optical cable；8, fiber Bragg grating signal processor；9、
Manual pull station；10, expansion bolt；11, optical branching device；12, fire alarm control unit.
Specific implementation mode
Below in conjunction with attached drawing, invention is further described in detail.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this
It is all protected by Patent Law in the protection domain of invention.
Embodiment one：
A kind of fiber grating detector, as shown in Figure 1, including temp-sensing element 1, for detecting environment temperature；Humidity sensor 2,
Ambient humidity for detecting 1 place environment of temp-sensing element, output represent the Humidity Detection signal of ambient humidity；Wiper 3 is used
In striking off the droplet on temp-sensing element 1；Processor (is not drawn into) in figure, is connect with humidity sensor 2 and 3 signal of wiper, is used
In the Humidity Detection signal for receiving humidity sensor 2, the ambient humidity that Humidity Detection signal is represented and preset humidity limit value
Comparison under the ambient humidity, starts if ambient humidity is more than humidity limit value according to preset ambient humidity and wiper 3
The relationship of frequency starts wiper 3 with the corresponding initiation culture of the ambient humidity.
In the present embodiment, preset multiple continuous humidity ranges are all higher than humidity limit value in the processor.Due to ring
Border humidity is bigger, and the speed for generating droplet is faster, therefore the initiation culture of wiper 3 is higher.So the peak value of humidity range
Bigger, corresponding initiation culture is higher.
According to the relationship of preset ambient humidity and the initiation culture of wiper 3, with the corresponding startup frequency of the ambient humidity
Rate starts wiper 3, specially：In the processor in preset multiple continuous humidity ranges, multiple temperature ranges one are a pair of
Should there are preset initiation culture, the ambient humidity that processor is exported according to humidity sensor 2 to judge the humidity where ambient humidity
Range selects the corresponding initiation culture of the humidity range to start wiper 3.In an embodiment of the present invention, processor 89C51
Microcontroller.
In an embodiment of the present invention, the formation of droplet is related with ambient humidity, temperature and its air pressure, the temperature in tunnel
Compare stabilization with air pressure, thus whether will produce in tunnel droplet be defaulted as in the present embodiment it is only related with ambient humidity, i.e.,
Humidity limit value in the present embodiment is the humidity that can just generate droplet.So being more than humidity limit value in default contexts humidity
When just will produce droplet, at this moment just need that temp-sensing element 1 is carried out to scrape water process.
Wiper 3 includes push-rod electric machine 31 and scrapes water ring 32, and push-rod electric machine 31 includes motor 311 and connect with motor 311
Push rod 312, end connection of the push rod 312 far from motor 311 scrape water ring 32, scrape 32 sliding sleeve of water ring on the temp-sensing element 1.
In the present embodiment, it is to make a round trip on temp-sensing element 1 to scrape water ring 32 and often act primary, i.e., is moved from one end of temp-sensing element 1
It moves to the other end and returns original position.The material for scraping water ring 32 is rubber, similar with the material of the rubber strip of wiper.To
The water on clean temp-sensing element 1 can be scraped.The brush DC motors of model TGA-100 can be used in push-rod electric machine 31.
Wiper 3 further includes pedestal 33, and pedestal 33 fixes motor 311 and motor 311 is made to keep a spacing with temp-sensing element 1
From, avoid motor 311 work when temperature interference temp-sensing element 1 detection.
Embodiment two：
A kind of fiber grating detector in tunnel fire detection system, including embodiment one, the base of the light Optical grate detector
Seat 33 is connect with the arc top in tunnel.As shown in Fig. 2, further including L bracket 4, steel hinge rope 5, Optical hanger 6, optical cable 7, L bracket
4 are connect with the arc top in tunnel by expansion bolt 10, and steel hinge rope 5 is set to the lower end of L bracket 4, optical cable along length of tunnel direction
Hook 6 is set on steel hinge rope 5, and optical cable 7 connects temp-sensing element 1 and on Optical hanger 6.
As shown in figure 3, system further includes fiber Bragg grating signal processor 8, fiber Bragg grating signal processor 8 provides scanning light
The output end in source is connected with the input terminal of optical cable 7, the signal input part of the output end and fiber Bragg grating signal processor 8 of optical cable 7
It is connected, fiber Bragg grating signal processor 8 is also connect with 12 signal of fire alarm control unit.After scanning light source is by temp-sensing element 1
It returns to input terminal and carries out optical signal demodulation, fiber Bragg grating signal processor 8 is made to realize display to ambient tunnel temperature, and
When temperature is higher than preset temperature limit, start fire alarm control unit 12.The output end and light of fiber Bragg grating signal processor 8
Optical branching device 11 is provided between 7 input terminal of cable, optical branching device 11 can connect multiple optical cables 7.Every optical cable 7 corresponds to an independence
Address coding will can be laid with more optical cables 7 in length of tunnel direction according to demand, and tunnel is divided into several alarm subregions.
The processor and humidity sensor 2 of fiber grating detector are abutted against set on tunnel arc at the position of nearly temp-sensing element 1,
Humidity sensor 2 is set to detect the humidity of 1 near zone of temp-sensing element.
As shown in figure 4, system further includes the manual pull station 9 being arranged in tunnel-side, manual pull station 9 and fire
12 signal of alarm controller connects.Manual pull station 9 enables the people on ground to manually boot fire apart from ground 1400mm
Alarm controller 12.
Claims (10)
1. a kind of fiber grating detector, including temp-sensing element (1), which is characterized in that further include,
Humidity sensor (2), for the ambient humidity of environment where detecting the temp-sensing element (1), output represents ambient humidity
Humidity Detection signal；
Wiper (3), for striking off the droplet on temp-sensing element (1)；
Processor is connect, the humidity for receiving humidity sensor (2) with the humidity sensor (2) and wiper (3) signal
Signal is detected, the ambient humidity that Humidity Detection signal is represented is compared with preset humidity limit value, if ambient humidity is more than humidity
Limit value, then under the ambient humidity, according to the relationship of preset ambient humidity and wiper (3) initiation culture, with the environmental wet
It spends corresponding initiation culture and starts wiper (3).
2. fiber grating detector according to claim 1, which is characterized in that it is described according to preset ambient humidity with scrape
The relationship of the initiation culture of hydrophone (3) starts wiper (3), specially with the corresponding initiation culture of the ambient humidity：It is handling
In device in preset multiple continuous humidity ranges, multiple temperature range one-to-one correspondence have preset initiation culture, handle
The ambient humidity that device is exported according to humidity sensor (2), judges the humidity range where ambient humidity, selects the humidity range pair
The initiation culture answered starts wiper (3).
3. fiber grating detector according to claim 2, which is characterized in that the wiper (3) includes push-rod electric machine
(31) and water ring (32) is scraped, the push-rod electric machine (31) includes motor (311) and the push rod (312) being connect with motor (311), institute
It states and scrapes water ring (32) described in end connection of the push rod (312) far from motor (311), described water ring (32) sliding sleeve of scraping is set on described
On temp-sensing element (1).
4. fiber grating detector according to claim 3, which is characterized in that the wiper (3) further includes pedestal
(33), the pedestal (33) fixes the motor (311) and the motor (311) is made to keep certain with the temp-sensing element (1)
Distance.
5. a kind of tunnel fire detection system, including fiber grating detector according to any one of claims 1-4, feature
It is, further includes L bracket (4), steel hinge rope (5), Optical hanger (6), optical cable (7), the arc of L bracket (4) and tunnel
Top connection, the steel hinge rope (5) are set to the lower end of the L bracket (4) along length of tunnel direction, and the Optical hanger (6) sets
It is cut with scissors on rope (5) in the steel, the optical cable (7) connects the temp-sensing element (1) and on the Optical hanger (6).
6. tunnel fire detection system according to claim 5, which is characterized in that the L bracket (4) passes through expanding screw
Bolt (10) is connect with the arc top in tunnel.
7. tunnel fire detection system according to claim 6, which is characterized in that the system also includes fiber grating letters
Number processor (8), the fiber Bragg grating signal processor (8) provide the input of the output end and the optical cable (7) of scanning light source
End is connected, and the output end of the optical cable (7) is connected with the signal input part of the fiber Bragg grating signal processor (8), the light
Fine electromechanical converter (8) also connect with the fire alarm control unit (12) signal.
8. tunnel fire detection system according to claim 7, which is characterized in that the fiber Bragg grating signal processor
(8) it is provided with optical branching device (11) between output end and optical cable (7) input terminal, the optical branching device (11) can connect multiple institutes
State optical cable (7).
9. tunnel fire detection system according to claim 8, which is characterized in that the system also includes be arranged in tunnel
The manual pull station (9) of side wall, the manual pull station (9) connect with the fire alarm control unit (12) signal.
10. tunnel fire detection system according to claim 9, which is characterized in that the processor and the humidity pass
Sensor (2) is abutted against set on tunnel arc at the position of nearly temp-sensing element (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810080292.2A CN108305429B (en) | 2018-01-27 | 2018-01-27 | Tunnel fire detection system and fiber grating detector thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810080292.2A CN108305429B (en) | 2018-01-27 | 2018-01-27 | Tunnel fire detection system and fiber grating detector thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108305429A true CN108305429A (en) | 2018-07-20 |
| CN108305429B CN108305429B (en) | 2020-02-21 |
Family
ID=62866934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810080292.2A Active CN108305429B (en) | 2018-01-27 | 2018-01-27 | Tunnel fire detection system and fiber grating detector thereof |
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| Country | Link |
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| CN (1) | CN108305429B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114705002A (en) * | 2022-06-08 | 2022-07-05 | 浙江力夫传感技术有限公司 | Auxiliary device for humidity sensor |
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| Publication number | Publication date |
|---|---|
| CN108305429B (en) | 2020-02-21 |
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