CN209000189U - A kind of time-sharing multiplex optical fiber flammable gas alarm device - Google Patents
A kind of time-sharing multiplex optical fiber flammable gas alarm device Download PDFInfo
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- CN209000189U CN209000189U CN201821867940.0U CN201821867940U CN209000189U CN 209000189 U CN209000189 U CN 209000189U CN 201821867940 U CN201821867940 U CN 201821867940U CN 209000189 U CN209000189 U CN 209000189U
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Abstract
Present disclose provides a kind of time-sharing multiplex optical fiber flammable gas alarm devices, including alarm controller, transmitter and several probes, the alarm controller connect post package with transmitter in mainframe box, and the transmitter is connected by passive long-distance optical fiber with several probes；The transmitter includes processor, drive module, light source, photo-coupler, Multichannel photoswitch, photoelectric converter, electric signal conditioning module, analog-digital converter and data transmission blocks, the processor, drive module, light source, photo-coupler, photoelectric converter, electric signal conditioning module and analog-digital converter are in turn connected to form circulation loop, the processor is connected by data transmission blocks with alarm controller, the Multichannel photoswitch is connected with photo-coupler, switches the optical signal transmission channel between photo-coupler and each probe for timesharing.
Description
Technical field
This disclosure relates to security monitoring field more particularly to a kind of time-sharing multiplex optical fiber flammable gas alarm device.
Background technique
In optical fiber fuel gas detection field, spectral absorption method is the most common detection technique.This method utilizes specific
The decaying of light intensity carrys out the concentration of detection gas when the light of wavelength is transmitted or reflected in gas.Each gas has oneself
Characteristic absorpting spectruming line can generate light absorption phenomenon, light intensity meeting when the optical wavelength that light source issues is overlapped with the absorption line of gas
A degree of decaying occurs, attenuation is related with the concentration of gas.
In the combustible gas monitorings application places such as coal mine, piping lane, tunnel, probe is with host distance usually up to several kilometers.
The optical signal that light source issues passes through long distance transmission and large number of connector, and strength retrogression is clearly, serious to reduce
The signal-to-noise ratio of light-intensity test signal adversely affects fuel gas detection accuracy.And when to multiple places progress combustible gas
When body monitors, multiple light sources and detection path need to be set, waste resource significantly.
Utility model content
In order to solve the deficiencies in the prior art, present disclose provides a kind of time-sharing multiplex optical fiber flammable gas alarm device,
The time-sharing multiplex that single source is realized using Multichannel photoswitch, realizes the remote fuel gas detection of multichannel, and utilization is infrared
The concentration of the Strength Changes detection fuel gas of optical signal solves multichannel optical fiber fuel gas lower over long distances and detects existing light
Decay by force problem excessive, that detection accuracy is poor.
To achieve the goals above, the technical solution of the disclosure is as follows:
A kind of time-sharing multiplex optical fiber flammable gas alarm device, including alarm controller, transmitter and several probes, it is described
Alarm controller connect post package with transmitter in mainframe box, and the transmitter passes through passive long-distance optical fiber and several probes
It is connected；
The transmitter includes processor, drive module, light source, photo-coupler, Multichannel photoswitch, photoelectric converter, electricity
Signal conditioning module, analog-digital converter and data transmission blocks, the processor, drive module, light source, photo-coupler, photoelectricity
Converter, electric signal conditioning module and analog-digital converter are in turn connected to form circulation loop, and the processor is sent by data
Module is connected with alarm controller, and the Multichannel photoswitch is connected with photo-coupler, for timesharing switching photo-coupler and each spy
Optical signal transmission channel between head.
Further, the alarm controller include data reception module, display module, key module, relay module,
Sound and light alarm module and power module, the alarm controller are connected by data reception module with transmitter, and the data connect
Receive module be connected with display module and relay module, the display module is connected with key module, the relay module and
Sound and light alarm module is connected, and the power module is used to power for alarm controller and transmitter.
Further, the alarm controller further includes indicator light and blower, the indicator light and blower and relay mould
Block is connected.
Further, the model TMS320F2812 of the processor, the processor is for controlling drive module driving
Light source generates optical signal, and receives the digital signal of analog-digital converter transmission, carries out the calculating of combustable gas concentration value, the processing
Combustable gas concentration value is sent to alarm controller by data transmission blocks by device.
Further, the photo-coupler is used to receive the optical signal of light source, and is transferred to probe by optical fiber, simultaneously will
Reflected optical signal transmission of popping one's head in is converted into low current signal by photoelectric converter and is sent to photoelectric converter
Electric signal conditioning module.
Further, the electric signal conditioning module is defeated for low current signal to be converted to and is enlarged into voltage signal
Analog-digital converter is arrived out, and the analog-digital converter is used to amplified voltage signal being converted to digital signal, is transferred to processing
Device.
Further, the multi-pass switch is 1XN Multichannel photoswitch.
Further, the light source is infrared light supply.
Further, the transmitter further includes temperature control modules, and the temperature control modules are connected with light source, is used for
Keep light-source temperature constant.
Further, the probe is that individual reflection formula fiber-optic fiber gas is popped one's head in, and the probe receives optical coupling by optical fiber
The optical signal of device transmission makes to interact in the opening optical path of optical signal inside it with fuel gas, and by optical signal transmission
Light echo coupler.
Compared with prior art, the beneficial effect of the disclosure is:
1, a kind of time-sharing multiplex optical fiber flammable gas alarm device of the disclosure realizes single source using Multichannel photoswitch
Time-sharing multiplex, solve multichannel optical fiber fuel gas lower over long distances and detect that existing light intensity attenuation is excessive, detection accuracy is poor
Problem.
2, a kind of time-sharing multiplex optical fiber flammable gas alarm device of the disclosure is dense to fuel gas using infrared signal
Degree measures.Its transmission signal vector (optical fiber) and probe be entirely it is passive, without power supply, there is no heating or burning
Phenomenon can be disposed close to the danger position of fuel gas, solve traditional flammable gas alarm device safety and monitoring
The intrinsic contradictions of demand.
3, a kind of time-sharing multiplex optical fiber flammable gas alarm device of the disclosure, it is real using the Strength Changes of infrared signal
The case where existing combustable gas concentration detection, there is no probe poisonings, working life is extended, maintenance cost is reduced.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is disclosure time-sharing multiplex optical fiber flammable gas alarm device system structure diagram；
Fig. 2 is disclosure controller system structural schematic diagram；
Fig. 3 is disclosure transducer system structural schematic diagram.
Specific embodiment
The disclosure is described further with specific embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In the disclosure, term for example "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", " side ",
The orientation or positional relationship of the instructions such as "bottom" is to be based on the orientation or positional relationship shown in the drawings, only to facilitate describing this public affairs
The relative for opening each component or component structure relationship and determination, not refers in particular to either component or element in the disclosure, cannot understand
For the limitation to the disclosure.
In the disclosure, term such as " affixed ", " connected ", " connection " be shall be understood in a broad sense, and indicate may be a fixed connection,
It is also possible to be integrally connected or is detachably connected；It can be directly connected, it can also be indirectly connected through an intermediary.For
The related scientific research of this field or technical staff can determine the concrete meaning of above-mentioned term in the disclosure as the case may be,
It should not be understood as the limitation to the disclosure.
As shown in Figure 1, a kind of time-sharing multiplex optical fiber flammable gas alarm device, if including alarm controller, transmitter and
Dry probe, the alarm controller connect post package with transmitter in the safety zone in mainframe box, being placed in application places, institute
It states transmitter and is connected by passive long-distance optical fiber with several probes, the probe placement is used in the easy leak region of fuel gas
Close-in measurement combustable gas concentration.
Due to the probe and optical signal transmission medium (optical fiber) of device be entirely it is passive, without power supply, there is no heating
Or combustion phenomena.Device realizes that combustable gas concentration detects using the Strength Changes of infrared signal, and there is no in probe
Malicious situation, extends working life, reduces maintenance cost.
As shown in figure 3, the transmitter includes processor, drive module, light source, photo-coupler, Multichannel photoswitch, photoelectricity
Converter, electric signal conditioning module, analog-digital converter and data transmission blocks, the processor, drive module, light source, optocoupler
Clutch, photoelectric converter, electric signal conditioning module and analog-digital converter are in turn connected to form circulation loop, and the processor passes through
Data transmission blocks are connected with alarm controller, and the Multichannel photoswitch is connected with photo-coupler, switch optical coupling for timesharing
Optical signal transmission channel between device and each probe.
The processor is Texas Instrument TMS320F2812 processor, and the processor is for controlling drive module generation
Suitable driving current signal, and the digital signal that analog-digital converter is sent is received, carry out the calculating of combustable gas concentration value；
The processor carries out the calculating of combustable gas concentration value using Bill's Lambert law can according to Bill's Lambert law
Combustion gas bulk concentration is higher, and decaying when optical signal is by open optical path is bigger and in a linear relationship.Therefore, it is returned by calculating
The attenuation of optical signal, the concentration value of available fuel gas, and specific calculating process is the prior art, and is not this
Apply for claimed content, therefore details are not described herein.
The drive module is distributed feedback laser drive module, under the control of a processor, generating driving
Current signal required for light source；
The optical source wavelength is the distributed feedback laser light source of 1654nm, i.e. infrared light supply, and the light source is used for
Under the excitation of drive module, optical signal is generated, and be transferred to photo-coupler；
The photo-coupler is used to receive the optical signal of light source, and is transferred to probe by Multichannel photoswitch, while will visit
Reflected optical signal transmission is to photoelectric converter；
The multi-pass switch is 1XN Multichannel photoswitch, model GSM18121L100.
The Multichannel photoswitch is used to control the channel switching between single source and multiple probes, and optical signal timesharing is passed
Transport to corresponding probe；
The photoelectric converter is PIN photoelectric converter, is used for the reflected optical signal of receiving transducer, and be converted into micro-
Weak current signal is output to electric signal conditioning module；
The electric signal conditioning module is output to modulus and turns for low current signal to be converted to and is enlarged into voltage signal
Parallel operation；
The analog-digital converter is ADS5424 analog-digital converter, for amplified voltage signal to be converted to digital letter
Number, and it is transferred to processor.
The transmitter further includes temperature control modules, and the temperature control modules are connected with light source, the temperature control
Module is used to control the temperature of infrared light supply, keeps infrared light supply temperature constant, the wavelength and power for avoiding optical signal are by environment
The influence of temperature change.
As shown in Fig. 2, the alarm controller includes data reception module, display module, key module, relay mould
Block, sound and light alarm module and power module, the alarm controller are connected by data reception module with transmitter, the data
Receiving module is connected with display module and relay module, and the display module is connected with key module, the relay module
It is connected with sound and light alarm module, the power module is used to power for alarm controller and transmitter.
The alarm controller further includes indicator light and blower, and the indicator light and blower are connected with relay module.
The data reception module be used for receive transmitter transmission combustable gas concentration measurement data and judge whether into
Row alarm, the display module is for showing combustable gas concentration value, alarm threshold value, alarm and fault message, the key mould
Block is used for the working condition according to alarm controller for alarm threshold value, the relay module to be arranged, and carries out power lights, operation
The light on and off of lamp and trouble light control, and the switch control of peripheral combined aural and visual alarm and blower.
The display module is dot matrix lcd module；
The relay module is 24V relay module.
The probe is that individual reflection formula fiber-optic fiber gas is popped one's head in, and the probe receives the light of photo-coupler transmission by optical fiber
Signal makes to interact in the opening optical path of optical signal inside it with fuel gas, and by optical signal transmission light echo coupler.
The working method of the disclosure are as follows:
Step 1) drive module under the control of a processor, generates current signal required for driving light source, produces light source
Third contact of a total solar or lunar eclipse signal, is transferred to photo-coupler, Multichannel photoswitch under the control of a processor, by the optical signal transmission of photo-coupler to
One probe；
Step 2) optical signal returns after interacting with fuel gas in the opening optical path in probe；
Step 3) transmitter handles the optical signal of return, obtains combustable gas concentration value and is transferred to controlling alarm
Device is shown, the combustable gas concentration detection of the first probe is completed；
Step 4) controls Multichannel photoswitch for optical signal transmission to the second probe, repeats step 2) and step 3), until time
Go through all probes.
The probe sum preferably 8.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Although above-mentioned be described in conjunction with specific embodiment of the attached drawing to the disclosure, model not is protected to the disclosure
The limitation enclosed, those skilled in the art should understand that, on the basis of the technical solution of the disclosure, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within the protection scope of the disclosure.
Claims (10)
1. a kind of time-sharing multiplex optical fiber flammable gas alarm device, it is characterised in that: including alarm controller, transmitter and several
Probe, the alarm controller connect post package with transmitter in mainframe box, and the transmitter passes through passive long-distance optical fiber
It is connected with several probes；
The transmitter includes processor, drive module, light source, photo-coupler, Multichannel photoswitch, photoelectric converter, electric signal
Conditioning module, analog-digital converter and data transmission blocks, the processor, drive module, light source, photo-coupler, photoelectric conversion
Device, electric signal conditioning module and analog-digital converter are in turn connected to form circulation loop, and the processor passes through data transmission blocks
It is connected with alarm controller, the Multichannel photoswitch is connected with photo-coupler, between timesharing switching photo-coupler and each probe
Optical signal transmission channel.
2. a kind of time-sharing multiplex optical fiber flammable gas alarm device as described in claim 1, the alarm controller includes number
According to receiving module, display module, key module, relay module, sound and light alarm module and power module, the alarm controller
It is connected by data reception module with transmitter, the data reception module is connected with display module and relay module, described
Display module is connected with key module, and the relay module is connected with sound and light alarm module, and the power module is used for as report
Alert controller and transmitter power supply.
3. a kind of time-sharing multiplex optical fiber flammable gas alarm device as claimed in claim 2, the alarm controller further include
Indicator light and blower, the indicator light and blower are connected with relay module.
4. a kind of time-sharing multiplex optical fiber flammable gas alarm device as described in claim 1, the model of the processor
TMS320F2812, the processor generates optical signal for controlling drive module driving light source, and receives analog-digital converter transmission
Digital signal, carry out the calculating of combustable gas concentration value, the processor is by data transmission blocks by combustable gas concentration value
It is sent to alarm controller.
5. a kind of time-sharing multiplex optical fiber flammable gas alarm device as described in claim 1, the photo-coupler is for receiving
The optical signal of light source, and probe is transferred to by optical fiber, while the reflected optical signal transmission that will pop one's head in is to photoelectric converter,
Low current signal is converted by photoelectric converter and is sent to electric signal conditioning module.
6. a kind of time-sharing multiplex optical fiber flammable gas alarm device as claimed in claim 5, the electric signal conditioning module are used
In low current signal to be converted to and is enlarged into voltage signal, it is output to analog-digital converter, the analog-digital converter will be for that will put
Voltage signal after big is converted to digital signal, is transferred to processor.
7. a kind of time-sharing multiplex optical fiber flammable gas alarm device as described in claim 1, the multi-pass switch is that 1XN is more
Road photoswitch.
8. a kind of time-sharing multiplex optical fiber flammable gas alarm device as described in claim 1, the light source is infrared light supply.
9. a kind of time-sharing multiplex optical fiber flammable gas alarm device as described in claim 1, the transmitter further includes temperature
Control module, the temperature control modules are connected with light source, for keeping light-source temperature constant.
10. a kind of time-sharing multiplex optical fiber flammable gas alarm device as described in claim 1, the probe is individual reflection formula
Fiber-optic fiber gas probe, the probe are received the optical signal of photo-coupler transmission by optical fiber, make the opening of optical signal inside it
It interacts in optical path with fuel gas, and by optical signal transmission light echo coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821867940.0U CN209000189U (en) | 2018-11-13 | 2018-11-13 | A kind of time-sharing multiplex optical fiber flammable gas alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821867940.0U CN209000189U (en) | 2018-11-13 | 2018-11-13 | A kind of time-sharing multiplex optical fiber flammable gas alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209000189U true CN209000189U (en) | 2019-06-18 |
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ID=66807533
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|---|---|---|---|
| CN201821867940.0U Active CN209000189U (en) | 2018-11-13 | 2018-11-13 | A kind of time-sharing multiplex optical fiber flammable gas alarm device |
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| Country | Link |
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| CN (1) | CN209000189U (en) |
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2018
- 2018-11-13 CN CN201821867940.0U patent/CN209000189U/en active Active
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