CN110118729A - Operation tunnel gas monitoring device and system based on passive laser methane sensor - Google Patents
Operation tunnel gas monitoring device and system based on passive laser methane sensor Download PDFInfo
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- CN110118729A CN110118729A CN201910222593.9A CN201910222593A CN110118729A CN 110118729 A CN110118729 A CN 110118729A CN 201910222593 A CN201910222593 A CN 201910222593A CN 110118729 A CN110118729 A CN 110118729A
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- methane
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
Abstract
The invention discloses operation tunnel gas monitoring devices and system based on passive laser methane sensor, comprising: optical-fiber laser methane transducer part, signal processing circuit, power circuit；Optical-fiber laser methane transducer part is for carrying out methane content infomation detection, and the methane content information that will test passes to signal processing circuit；Signal processing circuit handles the methane content information detected；Power circuit is for being powered optical-fiber laser methane transducer part and signal processing circuit；Optical-fiber laser methane transducer part includes: laser generator and methane transducer, and methane transducer is mounted on the preset methane aggregation zone of tunnel inner top；Laser generator and methane transducer are attached by optical fiber；Laser generator, signal processing circuit, power circuit are mounted on the non-methane aggregation zone outside tunnel or in tunnel；The safety for improving tunnel gas monitoring system enhances its communications anti-jamming.
Description
Technical field
The present invention relates to tunnel safeties to monitor field, and in particular, to a kind of battalion based on passive laser methane sensor
Transport tunnel gas monitoring device and system.
Background technique
Methane density is less than atmospheric density, can be to the top in tunnel by the methane that tunnel-liner penetrates into tunnel internal space
The migration of portion space；Railway tunnel has generally imported and exported certain height difference, can form certain natural ventilation pressure, lead in tunnel in no train
Generally there is natural airflow to flow through when row, but wind direction, wind speed all change with weather conditions such as the temperature at tunnel both ends, humidity at any time
(when there is air shaft in centre, situation is increasingly complex), it is completely uncontrollable, it may occur in which distinguished and admirable stationary state under extreme case；There are column
Vehicle forms Piston Ventilation when current, and wind speed is larger, and the methane for accumulating in tunnel top space can be flowed with the air-flow of Piston Ventilation,
The train passage time is shorter, and when tunnel is longer, methane gas is difficult to exclude outside hole completely with train Piston Ventilation, separately naturally logical
When wind wind direction and train Piston Ventilation are inconsistent, gravity-flow ventilation can also generate inhibition to the exclusion of methane gas.Natural wind
The power of pressure, the passage interval time of train, Piston Ventilation number, pour in tunnel absolute gas emission rate synthesis determine battalion
Transport gas density and burden in tunnel.In the presence of many uncontrollable factors, comprehensive consideration, for there is high watt among process of construction
The railway tunnel of this risk is operated, and generally can all install methane monitoring system and mechanical ventilation equipment, in case of need.
The gas-monitoring in operation tunnel generally uses coal mine safety monitoring system.It usually has the following problems to be difficult to overcome:
1, conventional mine laser methane transducer is installed on the following 20-30cm (possible laminar flow space) in top, sensor
Power supply (voltage is generally 5V) itself is needed, the intrinsic safety electric source powered to sensor all designs have what safeguard measure, but extreme feelings
Still have all that there may be sparks to cause gas combustion or explosion (for example forceful electric power is sealed in, be struck by lightning etc. and punctures electric elements) under condition.
2, the contact net voltage class at the top of high-speed rail is 25KV, can generate very strong electromagnetic field, and laser methane sensor
Be installed on the following 20-30cm in top, its own and its 485 communication lines will receive intense electromagnetic and interfere, inevitably cause with it is upper
Machine communicating interrupt failure.
3, conventional mine laser methane transducer will test component, signal processing circuit, power circuit, signal output electricity
The components together as one such as road, display circuit, alarm signal, failure probability is higher, it is installed to tunnel top, meets failure inspection
It repairs, safeguard extremely inconvenience.Railway closed operation, access tunnel time are longer；Tunnel height reaches 10m or more, it is necessary to special facilities.
4, according to " railway tunnel gas technical specification ", tunnel machine ventilation is not to open at any time, only when in tunnel
Any methane transducer detects that methane concentration reaches a ceiling value, starts blower, when methane concentration is reduced to a lower limit value, stops
Only blower.Existing mine supervision system does not have this linkage function.
5, for a rail track, tunnel may be more, and always linear state, tunnel are substantially unmanned value
It keeps, does not need to show on the spot in tunnel, alarm, but need to grasp gas density, equipment fortune in real time in Dispatch and Command Center
The information such as row state.
Summary of the invention
The present invention provides a kind of operation tunnel gas monitoring device and system based on passive laser methane sensor, solutions
It has determined the deficiency of existing coal mine safety monitoring system, has improved the safety of tunnel gas monitoring system, enhance its communication
Anti-interference.
For achieving the above object, this application provides the operation tunnel gas prisons based on passive laser methane sensor
Device is controlled, described device includes:
Optical-fiber laser methane sampling head, laser generator, signal processing circuit and single-chip microcontroller, power circuit, blower start-stop
Sensor, 485 communication substations, 485 buses, controller, fiber optic network, host computer and its software；Laser generator generates specific
The laser of wavelength simultaneously passed through optical splitter and gives multiple optical-fiber laser methane sampling heads, and optical-fiber laser methane sampling head is for carrying out
Methane content information collection, and collected methane content information is passed into signal processing circuit and single-chip microcontroller；Signal processing
The digital signal of circuit and single-chip microcontroller after filtering, amplification, A/D conversion gives microprocessor and carries out signal according to preset algorithm
Processing, obtains methane concentration, methane concentration result is uploaded to host computer by 485 buses, fiber optic network, host computer is according to first
Alkane concentration judges whether to need to open by software, blowing-out machine, under send instructions and opened automatically by controller, stop fan operation；Power supply electricity
Road is for being powered laser generator and signal processing circuit.
Wherein, optical-fiber laser methane transducer part includes: laser generator and methane sampling head, and methane sampling head is mounted on
The preset methane aggregation zone of tunnel inner top；Laser generator is attached with methane sampling head by optical fiber；Laser occurs
Device, signal processing and control circuit, power circuit are mounted on the non-methane aggregation zone outside tunnel or in tunnel.Controller installation
In 485 buses close to blower, blower on-off transducer is mounted on fan power route.
Wherein, the principle of the present apparatus are as follows: laser generator is placed on to the dedicated cavern of outside tunnel or tunnel lower, only
Sensing head is mounted on tunnel top, avoids the problem of spark causes gas combustion or explosion, laser generator and sensing head
Between using optical fiber connect, avoid interference of the magnetic field to communication, in the tunnel top space that may accumulate methane, methane sensing
Head is non-active operation state, prevents itself completely and generates electric spark, to avoid causing gas combustion or explosion.
Further, passive laser methane sensor, blower on-off transducer, controller and processing system specifically include:
Passive laser methane sensor and processing system；Passive laser methane sensor is used to detect the methane of installation site
Concentration；Blower on-off transducer is used for the start-stop state of detection blower fan；Host computer is responsible for showing methane concentration information and blower shape
State, and start-stop blower is judged whether according to preset threshold, under send instructions；Controller is used for the secondary returning started switch by blower
Road start and stop blower.
Further, signal processing circuit, signal output apparatus, power circuit and laser generator become one.Swash
The light methane sensing head service life as long as five years, can be set using suitable micropower laser by methane institute's principle of absorption of various concentration
Meter, does not need to correct, will not break down, can be replaced again up to life termination after installation.And there are small probability failures
The components such as laser generator, signal processing circuit, power circuit, signal output apparatus, display circuit, alarm signal be mounted on
The dedicated cavern of outside tunnel or tunnel lower overhauls, is easy to maintain.
Further, the non-methane aggregation zone in tunnel offers cavern, laser generator, signal processing circuit, electricity
Source circuit, 485 communication substations are mounted in cavern.
Further, the optical-fiber laser methane transducer part is multichannel optical fiber laser methane sensor part, each to swash
Optical generator corresponds to multiple methane transducers.
Further, described device includes multiple optical-fiber laser methane transducer parts, multiple optical-fiber laser methane transducers
Part is evenly distributed on the preset methane aggregation zone of tunnel inner top.
Further, described device further includes controller, and the controller is used to be based on optical-fiber laser methane transducer part
The methane content detected operates the opening and closing of the ventilating system in tunnel.
Further, when either fiber laser methane sensor part detects that methane concentration is more than threshold value in tunnel, control
Device processed connects the secondary circuit of blower starting, starts blower, after methane concentration reduces threshold value or less, disconnects the two of blower starting
Minor loop stops blower.Realize the linkage of monitoring device and ventilating system.
Present invention also provides a kind of operation tunnel gas monitoring system based on passive laser methane sensor, the system
System includes several mentioned-above operation tunnel gas monitoring devices based on passive laser methane sensor, each based on passive
The tunnel gas monitoring device of laser methane sensor respectively corresponds multiple tunnels an of route.
Further, the system also includes 2 servers, system is realized using 2 core iron road system-specific communication cables
Communication transfer is respectively arranged a server in the beginning and end of system communications line while running, and is realized and taken by public network
The complementation for device data of being engaged in.When communication line interrupts, the operation of whole system is not influenced.
Further, the operation tunnel gas monitoring system based on passive laser methane sensor, in railway engineering dispatching
Center real-time exhibition methane concentration situation and blower open and-shut mode, server is according to the responsible person concerned of setting, automatically by gas
Concentration pushes to responsible person concerned by SMS more than Threshold Alerts information, blower open and-shut mode, malfunction etc.: related
Person liable can also check the information such as methane concentration, fan's start-stop condition by cell phone application game server.
One or more technical solution provided by the present application, has at least the following technical effects or advantages:
1, the application sensing head and its transmission cable are passive, prevent itself completely and generate electric spark, so as to cause gas combustion
It burns or explodes；Not by electromagnetic interference, safety and communication capacity are improved.
2, the laser methane sensing head service life is long, does not need to correct, and will not break down, other components being easily damaged peace
It is maintenance, easy to maintain outside tunnel or the dedicated cavern of tunnel lower.
3, realize that methane concentration and mechanical ventilation equipment link in tunnel.
4, one server is respectively set in the beginning and end of route, runs simultaneously, and server count is realized by public network
According to complementation, even to guarantee transmission line abnormal interrupt at one, system still operates normally.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention；
Fig. 1 is the operation tunnel gas monitoring system frame structure signal in the application based on passive laser methane sensor
Figure；
Fig. 2 is that system installs distribution schematic diagram in tunnel in the application；
Fig. 3 is grid connection schematic diagram in the application.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the case where not conflicting mutually, the application's
Feature in embodiment and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
Implemented with being different from the other modes being described herein in range using other, therefore, protection scope of the present invention is not by under
The limitation of specific embodiment disclosed in face.
Referring to FIG. 1, this application provides the operation tunnel gas monitoring device based on passive laser methane sensor, figure
1 (system frame structure schematic diagram) is structural schematic diagram of the invention.In figure: server 1 and server 2 are separately positioned on railway
The Dispatch and Command Center at route both ends；It can multiple tunnels on route；The mountable multiple substations in each tunnel, multiple laser methane moulds
Block, multiple blower on-off transducers, multiple programmable logic controller (PLC)s.
Referring to FIG. 2, Fig. 2 (system installs distribution schematic diagram in tunnel) shows tunnel device position distribution and transmission line
Cable position, the tunnel 3- in Fig. 2,4- blower, the passive methane sensing head of 5-, the cavern 6-, K- blower on-off transducer, M- laser methane
Module, D- cutoff instrument, the comprehensive substation of F-.Fig. 3 shows system server database and realizes data complement by public network.
Using multichannel optical fiber laser methane sensor part, laser generator is placed on the special of outside tunnel or tunnel lower
With cavern, sensing head is only mounted on tunnel top, (laser occurs using optical fiber connection between laser generator and sensing head
Device is more than 1 pair to sensing head), the components such as signal processing circuit, power circuit, signal output apparatus, display circuit and laser are sent out
Raw device together as one, is mounted on the dedicated cavern of outside tunnel or tunnel lower, in the tunnel top space that may accumulate methane, first
Alkane sensing head is non-active operation state, prevents itself completely and generates electric spark, so as to cause gas combustion or explosion.
Laser methane sensing head and its transmission fiber are completely passive, not by electromagnetic interference.The laser methane sensing head service life is long
Up to 5 years, it can be designed by methane institute's principle of absorption of various concentration using suitable micropower laser, not need to correct, also not
It will appear failure, can be replaced again up to life termination after installation.And there are at the laser generator of small probability failure, signal
The components such as reason circuit, power circuit, signal output apparatus, display circuit are mounted on the dedicated cavern of outside tunnel or tunnel lower,
It overhauls, is easy to maintain.
A kind of logic programmable controller is designed in 485 buses of system, exports an on-off signal, when in tunnel
One methane transducer detects that methane concentration reaches a ceiling value, connects the secondary circuit of blower starting, starts blower, works as methane
Concentration is reduced to a lower limit value, disconnects the secondary circuit of blower starting, stops blower.For a rail track, tunnel can
Can be more, always linear state realizes the backup of transmission line and undesirable using looped network function of exchange, and this programme plan is adopted
With 2 core iron road system-specific communication cables realize communication transfer, for guarantee do not cause because of transmission line accidental interruption data without
Method uploads, and a server is respectively arranged in the beginning and end of route, runs simultaneously, and realizes server data by public network
Complementation, even system still operates normally to guarantee transmission line abnormal interrupt at one.This system can be used for high watt of subway
This operation tunnel, it can also be used to vcehicular tunnel, only vcehicular tunnel is without dedicated communication cable, can be changed to 4G the transmission of 5G public network.
Creating into that 1 set of the system is installed in your railway Guanyin Mountain tunnel, continuous 15 days actual measurement gas densities, by contrast, watt
This concentration data is within the scope of allowable error；It is tested, being able to achieve gas density transfinites automatic starting blower, and gas density reduces
To certain value, blower is automatically stopped.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (13)
1. the operation tunnel gas monitoring device based on passive laser methane sensor, which is characterized in that described device includes:
Multiple optical-fiber laser methane sampling heads, laser generator, signal processing circuit, fiber optic network, power circuit；Laser occurs
Device, which generates the laser of specific wavelength and passed through optical splitter, gives multiple optical-fiber laser methane sampling heads, the sampling of optical-fiber laser methane
Collected methane content information is passed to signal processing circuit for carrying out methane content information collection by head；At signal
Manage circuit and for handling methane content information；Methane sampling head is mounted on the preset methane accumulation regions of tunnel inner top
Domain；Laser generator is attached with methane sampling head by fiber optic network；Laser generator, signal processing circuit, power supply electricity
Road is mounted on the non-methane aggregation zone outside tunnel or in tunnel.
2. the operation tunnel gas monitoring device according to claim 1 based on passive laser methane sensor, feature
It is, described device further include: single-chip microcontroller, 485 communication substations, 485 buses, controller, host computer and its software；Signal processing
By treated, methane content information transmitting single-chip microcontroller calculates methane concentration to circuit, and single-chip microcontroller passes through methane concentration result
485 buses, fiber optic network are uploaded to host computer, and host computer judges whether to need to open by software according to methane concentration or blowing-out
Machine, and corresponding instruction is handed down to controller, controller is opened automatically based on instruction or blowing-out machine.
3. the operation tunnel gas monitoring device according to claim 2 based on passive laser methane sensor, feature
It is, controller is mounted in 485 buses in blower preset range, and blower on-off transducer is mounted on fan power line
On the road.
4. the operation tunnel gas monitoring device according to claim 2 based on passive laser methane sensor, feature
Be, signal processing circuit for collected methane content information is filtered, is amplified, A/D conversion process, treated
Digital signal gives single-chip microcontroller and carries out signal processing according to preset algorithm, obtains methane concentration.
5. the operation tunnel gas monitoring device according to claim 3 based on passive laser methane sensor, feature
It is, blower on-off transducer is used for the start-stop state of detection blower fan；Host computer is for still showing methane concentration information and wind
Machine state, and judged whether out according to preset threshold or blowing-out machine, under send instructions；What controller was used to start switch by blower
Secondary circuit start and stop blower.
6. the operation tunnel gas monitoring device according to claim 1 based on passive laser methane sensor, feature
It is, described device further includes warning circuit, display circuit, signal output apparatus, and warning circuit is used in the methane detected
Content is alarmed when being more than threshold value；Display circuit is for showing that signal is defeated to the monitoring result and operation information of device
Circuit is for exporting coherent signal out.
7. the operation tunnel gas monitoring device according to claim 6 based on passive laser methane sensor, feature
It is, signal processing circuit, signal output apparatus, display circuit, warning circuit, power circuit and laser generator are integrated into one
Body.
8. the operation tunnel gas monitoring device according to claim 1 based on passive laser methane sensor, feature
It is, the non-methane aggregation zone in tunnel offers cavern, and laser generator, signal processing circuit, power circuit are respectively mounted
In cavern.
9. the operation tunnel gas monitoring device according to claim 1 based on passive laser methane sensor, feature
It is, optical-fiber laser methane transducer part includes: laser generator and methane transducer, the optical-fiber laser methane transducer part
For multichannel optical fiber laser methane sensor part, each laser generator corresponds to multiple methane sampling heads.
10. the operation tunnel gas monitoring device according to claim 1 based on passive laser methane sensor, feature
It is, multiple optical-fiber laser methane sampling heads are evenly distributed on the preset methane aggregation zone of tunnel inner top.
11. a kind of operation tunnel gas monitoring system based on passive laser methane sensor, which is characterized in that the system packet
It includes several such as the operation tunnel gas monitoring based on passive laser methane sensor any one of in claim 1-10
Device, each the operation tunnel gas monitoring device based on passive laser methane sensor respectively corresponds on an operation route
Multiple tunnels.
12. the operation tunnel gas monitoring system according to claim 11 based on passive laser methane sensor, special
Sign is, the system also includes: 2 servers, system realize communication transfer using 2 core iron road system-specific communication cables,
One server is respectively set in the beginning and end of system communications line while being run, and server data is realized by public network
It is complementary.
13. the operation tunnel gas monitoring system according to claim 12 based on passive laser methane sensor, special
Sign is that the system is in railway engineering dispatching center real-time exhibition methane concentration situation and blower open and-shut mode, server root
According to the communicating terminal of setting, gas density is pushed to more than Threshold Alerts information, blower open and-shut mode, malfunction automatically pre-
If terminal, default terminal can game server check methane concentration, fan's start-stop condition information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910222593.9A CN110118729A (en) | 2019-03-22 | 2019-03-22 | Operation tunnel gas monitoring device and system based on passive laser methane sensor |
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| CN201910222593.9A CN110118729A (en) | 2019-03-22 | 2019-03-22 | Operation tunnel gas monitoring device and system based on passive laser methane sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112161648A (en) * | 2020-09-14 | 2021-01-01 | 精英数智科技股份有限公司 | Abnormal sensor identification method and device, readable storage medium and electronic equipment |
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Application publication date: 20190813 |