CN205749277U - Laser gas detecting device - Google Patents
Laser gas detecting device Download PDFInfo
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- CN205749277U CN205749277U CN201620651944.XU CN201620651944U CN205749277U CN 205749277 U CN205749277 U CN 205749277U CN 201620651944 U CN201620651944 U CN 201620651944U CN 205749277 U CN205749277 U CN 205749277U
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- 238000005259 measurement Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 238000011156 evaluation Methods 0.000 claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000007664 blowing Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 230000004044 response Effects 0.000 claims abstract description 6
- 239000013307 optical fiber Substances 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 claims description 3
- 238000003745 diagnosis Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 52
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 19
- 239000003245 coal Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000041 tunable diode laser absorption spectroscopy Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000001285 laser absorption spectroscopy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
This utility model relates to detection field, discloses a kind of laser gas detecting device, and this device includes: signal generating circuit, is configured to produce the measurement signal driving generating laser；Described generating laser, is configured in response to described measurement signal and launches laser beam；Reflection optical receiver, is configured to receive reflection laser beam；Signal evaluation circuit, is configured to be analyzed obtaining gas management result to described reflection laser beam；And blowing device, couple with described signal evaluation circuit, be configured to when described testing result is for transfiniting to the blowing of detection position.Pass through technique scheme, it is provided that device can efficiently carry out gas management and effectively reduce gas density when testing result is for transfiniting, and occupation mode is flexible.
Description
Technical field
This utility model relates to detection field, in particular it relates to a kind of laser gas detecting device.
Background technology
Gas (or methane) disaster in coal industry is the formidable enemy of Safety of Coal Mine Production all the time.At process of coal mining
In, gradually increasing along with exploiting the hidden danger carrying out secure context, gas accident, gas accident the most great, especially big is in colliery
The ratio accounted in accident raises year by year.
In colliery, the main component of gas is methane, accounts for 83%-89%, and gas is important of colliery natural disaster
Source.Gas reaches finite concentration can make people suffocate, meet burning things which may cause a fire disaster blast, and gas explosion the most easily causes coal-dust explosion.Coal and gas
Prominent is also a kind of strong dynamic phenomenon and serious disaster.
Detect generation source, source of leaks and the concentration of methane gas accurately and in time, for industrial and mineral safe operation, person peace
Complete and environmental conservation suffers from important effect.
Prior art provides multiple gas management scheme, such as, electric chemical formula gas detecting device, infrared gas
Detection device etc..But, detection device of the prior art is required for greatly near detection position being fixedly installed, then by letter
Testing result is fed back by number line to central control system.After central control system receives testing result, show relevant letter to operator
Breath.Such detection mode is when there is the dangerous situation that gas density increases, it is difficult to eliminate danger situation in time.
Therefore, prior art is badly in need of a kind of flexible and efficient to realize gas management and reducing the device of gas density.
Utility model content
The purpose of this utility model is to provide a kind of equipment, and this equipment can efficiently carry out gas management effectively reduction watt
This concentration, and occupation mode is flexible.
To achieve these goals, this utility model provides a kind of laser gas detecting device, and this device includes: signal is sent out
Raw circuit, is configured to produce the measurement signal driving generating laser；Described generating laser, is configured in response to described
Measure signal and launch laser beam；Reflection optical receiver, is configured to receive reflection laser beam；Signal evaluation circuit, is configured to
It is analyzed obtaining gas management result to described reflection laser beam；And blowing device, couple with described signal evaluation circuit,
It is configured to when described testing result is for transfiniting to the blowing of detection position.
Further, described signal generating circuit includes: signal generator, is configured to produce initial measurement signal；With
And pulse amplifier, it is configured to amplify described initial measurement signal export described measurement signal.
Further, described signal evaluation circuit includes: A/D converter, is configured to defeated for described reflection optical receiver
The analog electrical signal gone out is converted into digital signal；Signal comparator, is configured to carry out described digital signal with reference signal
Relatively；And result diagnosis apparatus, it is configured to the comparative result according to described signal comparator and determines gas management result.
Further, described device also includes: audible-visual annunciator, couples with described signal evaluation circuit, is configured to work as
Described gas management result is the alarm that transfinites.
Further, described reflection optical receiver includes receiving optical fiber and light sensor, wherein, described reception light,
It is configured to receive described reflection laser beam；And described light sensor, it is configured to export according to described reflection laser beam
Analog electrical signal.
Further, described device also includes: trigger switch, is configured to when triggering make on described signal generating circuit
Electricity.
Pass through technique scheme, it is provided that a kind of laser gas detecting device, this device can efficiently carry out gas inspection
Survey and effectively reduce gas density when testing result is for transfiniting, and occupation mode is flexible.
Other features and advantages of the utility model will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to offer and is further appreciated by of the present utility model, and constitutes a part for description, with following
Detailed description of the invention be used for explaining this utility model together, but be not intended that restriction of the present utility model.In the accompanying drawings:
Fig. 1 is a kind of laser gas detecting device that one embodiment of this utility model provides；And
Fig. 2 is the laser gas detecting device that another embodiment of this utility model provides.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.It should be appreciated that herein
Described detailed description of the invention is merely to illustrate and explains this utility model, is not limited to this utility model.
Fig. 1 is a kind of laser gas detecting device that one embodiment of this utility model provides.As it is shown in figure 1, this reality
With novel offer one laser gas detecting device, this device includes: signal generating circuit 11, is configured to produce driving laser
The measurement signal of emitter；Described generating laser 12, is configured in response to described measurement signal and launches laser beam；Reflection light
Receptor 13, is configured to receive reflection laser beam；Signal evaluation circuit 14, is configured to carry out described reflection laser beam point
Analysis obtains gas management result；And blowing device 15, couple with described signal evaluation circuit, be configured to when described detection knot
To the blowing of detection position when fruit is for transfiniting.
Pass through technique scheme, it is provided that a kind of laser gas detecting device, this device can efficiently carry out gas inspection
Survey and dry effectively to reduce gas density to detection position when testing result is for transfiniting, and occupation mode is flexible.
The laser gas detecting device provided in embodiment of the present utility model can be based on INFRARED ABSORPTION light splitting
Cleaning Principle, such as, can use laser diode as light source.Owing to laser can be absorbed by methane, during measurement, will swash
Light gas detecting device points to target acquisition thing such as pipeline, broken end heading portion, earth's surface etc., the laser being reflected back by reception
Bundle carrys out the absorptance of Laser Measurement bundle, thus realizes detecting methane heap or the purpose of leakage.Detection device can use cylinder
Density (namely for methane density PPM is multiplied by methane height of column M) is as units of measurement.
In embodiment of the present utility model, tunable diode laser absorption spectroscopy technology (Tunable can be used
Diode Laser Absorption Spectroscopy, TDLAS) utilize laser energy to be absorbed shape by gas molecule " frequency-selecting "
The principle becoming absorption spectrum measures gaseous species and concentration.
Fig. 2 is the laser gas detecting device that another embodiment of this utility model provides.As in figure 2 it is shown, in reality
Executing in mode, described signal generating circuit 11 may include that signal generator 111, is configured to produce initial measurement signal；With
And pulse amplifier 112, it is configured to amplify described initial measurement signal export described measurement signal.
In embodiments, signal generator 111 can be the initial measurement constant or variable according to preset program output
Signal.In one embodiment, the signal of signal generator 111 output can be sinusoidal wave.In another embodiment,
The signal of signal generator 111 output can be triangular wave.In yet another embodiment, the letter of signal generator 111 output
Number can be square wave.
Pulse amplifier 112 can be various types of amplifiers that the signal of telecommunication can be amplified output, such as brilliant
Body pipe amplifier, integrated operational amplifier etc..
In embodiments, described reflection optical receiver 13 can include receiving optical fiber 131 and light sensor 132, its
In, described reception light 131, it is configured to receive described reflection laser beam；And described light sensor 132, it is configured to
Analog electrical signal is exported according to described reflection laser beam.
In embodiments, described signal evaluation circuit 14 may include that A/D converter 141, be configured to by described instead
The analog electrical signal penetrating optical receiver 13 output is converted into digital signal；Signal comparator 142, is configured to described numeral letter
Number compare with reference signal；And result diagnosis apparatus 143, it is configured to the comparative result according to described signal comparator true
Determine gas management result.
In embodiments, described device can also include: audible-visual annunciator 16, with described signal evaluation circuit 14 coupling
Close, be configured to when described gas management result is the alarm that transfinites.
In embodiments, described device can also include: triggers switch (not shown), is configured to when triggering make institute
State signal generating circuit 11 to power on.Switched by triggering, can be with the work of Non-follow control laser gas detecting device or stopping.One
In individual embodiment, laser gas detecting device can be set and work all the time, can be by laser gas management by triggering switch
Device stops.In another embodiment, laser gas detecting device can be set and stop all the time, permissible by triggering switch
Laser gas detecting device is activated thus starts working.
The laser gas detecting device that this utility model provides mainly has the advantage that
Adverse circumstances are adaptable, it is not necessary to sampling, it is achieved on-the-spot on-line continuous is measured；
Overcoming the absorption interference of background gas, moisture and dust, certainty of measurement is greatly improved；
Fast response time, it is achieved industrial process real-time online manages, and can eliminate in time or alleviate the risk detected；
Can detect multiple gases parameter simultaneously, can measure analysis multiple gases, wide application, Instrument Development potentiality are big；
Optical fiber transmission property makes systematic difference more flexible, and cost performance is higher.
The laser gas detecting device that this utility model embodiment provides can be used for colliery, tunnelling, natural gas are opened
Adopt fields such as transporting.Additionally, use TDLAS technology can the simultaneously concentration of on-line measurement gas, temperature and flow velocity etc., and can realize
Multiple gases such as CO, CO2、O2、HF、HCl、CH4、NH3、H2O、H2S、HCN、C2H2、C2H4Deng automatic detection.
The main performance index of the citing of the laser gas detecting device that this utility model embodiment provides is as follows:
Methane detection scope 0.01-99%；
Measurement error≤± 1%F.S；
Response time < 1S；
Ambient temperature 0-40 °；
Type of alarm is sound, light warning.
Preferred implementation of the present utility model is described in detail above in association with accompanying drawing, but, this utility model does not limit
Detail in above-mentioned embodiment, in technology concept of the present utility model, can be to skill of the present utility model
Art scheme carries out multiple simple variant, and these simple variant belong to protection domain of the present utility model.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, this utility model is to respectively
Plant possible compound mode to illustrate the most separately.
Additionally, combination in any can also be carried out, as long as it is not disobeyed between various different embodiment of the present utility model
Carrying on the back thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (6)
1. a laser gas detecting device, it is characterised in that this device includes:
Signal generating circuit, is configured to produce the measurement signal driving generating laser；
Described generating laser, is configured in response to described measurement signal and launches laser beam；
Reflection optical receiver, is configured to receive reflection laser beam；
Signal evaluation circuit, is configured to be analyzed obtaining gas management result to described reflection laser beam；And
Blowing device, couples with described signal evaluation circuit, is configured to when described testing result is for transfiniting to detection position
Blowing.
Device the most according to claim 1, it is characterised in that described signal generating circuit includes:
Signal generator, is configured to produce initial measurement signal；And
Pulse amplifier, is configured to amplify described initial measurement signal export described measurement signal.
Device the most according to claim 1, it is characterised in that described signal evaluation circuit includes:
A/D converter, is configured to the analog electrical signal by described reflection optical receiver exports and is converted into digital signal；
Signal comparator, is configured to compare described digital signal with reference signal；And
Result diagnosis apparatus, is configured to the comparative result according to described signal comparator and determines gas management result.
Device the most according to claim 1, it is characterised in that described device also includes:
Audible-visual annunciator, couples with described signal evaluation circuit, is configured to when described gas management result is the alarm that transfinites.
Device the most according to claim 1, it is characterised in that described reflection optical receiver includes receiving optical fiber and light passes
Sensor, wherein,
Described reception light, is configured to receive described reflection laser beam；And
Described light sensor, is configured to export analog electrical signal according to described reflection laser beam.
Device the most according to claim 5, it is characterised in that described device also includes:
Trigger switch, be configured to when triggering make described signal generating circuit power on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620651944.XU CN205749277U (en) | 2016-06-27 | 2016-06-27 | Laser gas detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620651944.XU CN205749277U (en) | 2016-06-27 | 2016-06-27 | Laser gas detecting device |
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| Publication Number | Publication Date |
|---|---|
| CN205749277U true CN205749277U (en) | 2016-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620651944.XU Active CN205749277U (en) | 2016-06-27 | 2016-06-27 | Laser gas detecting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037094A (en) * | 2017-11-30 | 2018-05-15 | 新疆美特智能安全工程股份有限公司 | A kind of fuel gas laser telemetry system and method |
| CN109026155A (en) * | 2018-08-21 | 2018-12-18 | 四川矿隧环境检测有限公司 | A kind of method of the absolute outburst amount of the real time measure tunnel gas |
-
2016
- 2016-06-27 CN CN201620651944.XU patent/CN205749277U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037094A (en) * | 2017-11-30 | 2018-05-15 | 新疆美特智能安全工程股份有限公司 | A kind of fuel gas laser telemetry system and method |
| CN109026155A (en) * | 2018-08-21 | 2018-12-18 | 四川矿隧环境检测有限公司 | A kind of method of the absolute outburst amount of the real time measure tunnel gas |
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