CN103884477A - Handheld type laser methane gas baffle board leakage detecting device - Google Patents
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- CN103884477A CN103884477A CN201410151304.8A CN201410151304A CN103884477A CN 103884477 A CN103884477 A CN 103884477A CN 201410151304 A CN201410151304 A CN 201410151304A CN 103884477 A CN103884477 A CN 103884477A
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Abstract
The invention provides a handheld type laser methane gas baffle board leakage detecting device. The handheld type methane gas baffle board leakage detecting device comprises a laser baffle board and a handheld laser methane remote sensing instrument, and the laser baffle board is installed at the position where the methane gas leakage probably happens. The handheld laser methane remote sensing instrument comprises a battery charging module, a voltage converting module, a laser methane sensing module, a spectrum analyzing module, a display module and an alarm module. The laser methane sensing module comprises a laser and a laser detector. The laser of the laser methane sensing module outputs a laser signal, and the laser signal is reflected through the laser baffle board. The laser detector of the laser methane sensing module receives the laser signal reflected by the laser baffle board. The handheld type laser methane gas baffle board leakage detecting device has the advantages of being flexible, light, rapid in popularization and suitable for the industries such as petroleum, chemical engineering, coal and energy resource transportation.
Description
Technical field
The present invention relates to gas detection technology field, especially a kind of Handheld laser methane gas reflecting plate leak detecting device.
Background technology
At present, it is the distance apparatus taking laser instrument as detecting element that the Handheld laser methane of known use detects remote measurement alarm, this instrument is generally the METHOD FOR CONTINUOUS DETERMINATION for Methane in Air concentration, utilize diffuse reflection, the laser of light can be by the methane of variable concentrations institute principle of absorption, only has a hand-held methane detector, in the time that patrol officer uses hand-held instrument to patrol and examine, large area is patrolled and examined in process, once there be leakage point to leak, hand-held instrument is not surveyed leakage point, there is no timely early warning and alarming function, bring very big obstacle to Safety of Coal Mine Production.If therefore there is burning or blast, that will be earth shaking security incident, also can cause tremendous influence to social stability and human progress.Coal-mine gas is general name flammable, can explosive gas, and its principal ingredient is methane, accounts for the 83%-89% of gas total amount, and in coal mining process, gas mainly discharges from coal seam, rock stratum, goaf, and produces in process of production.Methane is the principal ingredient of rock gas, biogas and flammable liquid, is the gas of colorless and odorless, is insoluble in water, and character is more stable, be difficult to detect, the upper explosion limit of methane in atmosphere is 15.0%, under be limited to 5.3%.The gas of concentration in explosion limits is met naked light and is blasted, all reach more than 70% at coal mine gas explosion aspect particularly serious security incident and death toll, therefore, in Safety of Coal Mine Production is administered, control of coalmine gas becomes the core of improvement, and it is the key point of effectively preventing coal mine gas explosion that gas density is detected.The detection of widespread use gas is to adopt traditional electrochemical means, hand-held tester to carry out the detection of gas density at present.
Standard reflecting plate also can be described as standard mesh target (Diffuse Reflectance Standards), comprises standard reflectivity blank; The standard grayscale plate of various reflectivity; The Standard colour board of different colours; The more mutatis mutandis wavelength of wavelength is compared with quasi-reflection plate; Infrared 700nm-20um's is infrared with the gold-plated standard reflecting plate of mark; Fluorescence standard plate under different excitation wavelengths.The present invention selects gold-plated infrared external reflection Target Board to be called for short laser reflection plate, high diffuse reflectance reaches as high as 99%, good permanance, water proofing property, corrosion-resistant, be widely used in space flight and laser application, difficult drop-off, long service life, tasteless, nontoxic, high stability, high-low temperature resistant, radiation hardness, stands various test condition tests.Hand-held tester is that measuring distance can reach 100m, can reach 200m if add laser reflection plate measuring distance, use the situation of reflected-light exposure meter and TTL photometry, if carry out photometry taking laser reflection plate as object, even if the light and shade of subject and background is poor large, light value there will not be larger deviation, more convenient, and measurement target distance range is farther.
Use at present separately this method of hand-held tester to have that temperature monitoring target range is too short, accuracy of detection is lower, cannot find in time the problem that a small amount of methane gas leaks, and be difficult to determine the accurate location of leakage point.Most important, in the time that leaking, methane gas has the possibility of burning, blast, there is potential safety hazard.If therefore there is burning or blast, that will be earth shaking security incident, also can cause tremendous influence to social stability and human progress.In addition, aforesaid way cannot be found and report to the police in the initial period of the easy leakage point of methane, very easily caused serious secondary disaster.Therefore the technical security protection that uses separately hand-held tester detector monitors methane gas to leak is poor, cannot effectively reduce methane gas and leak environmental pollution and the security risk brought.
, all there is above-mentioned security classes problem in other large-scale application places of all methane gass described above or inflammable gas.Therefore, existing single hand-held tester measuring distance that uses is short, and cannot find in time the easy leakage point of methane, has explosion potential.How in the time that methane gas detects, the initial period is found, can be safely, efficiently directly judge and the leakage scope of methane gas in large-scale application places become the problem of needing solution badly.
Summary of the invention
(1) technical matters that will solve
The object of the invention is, a kind of Handheld laser methane gas reflecting plate leak detecting device is provided, reflecting plate is fixed in advance the region that methane gas leaks may occur, can realize the detection to there is methane gas leakage region, in the time that patrol officer uses hand-held instrument to patrol and examine, be beneficial to the reflection source that receives laser reflection plate, be convenient to search Leakage Gas point, can not produce owing to missing the danger such as the blast that leakage point causes, reduce to greatest extent potential safety hazard node, can realize fast the judgement of methane being leaked to scope simultaneously.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of Handheld laser methane gas reflecting plate leak detecting device, comprising: laser reflection plate, Handheld laser remote methane monitor, described laser reflection plate is arranged on the position that methane gas leakage may occur; Described Handheld laser remote methane monitor comprises battery charging module, voltage transformation module, laser methane sensing module, spectral analysis module, display module and alarm module, described laser methane sensing module also comprises laser instrument, laser detector, the laser instrument Output of laser signal of described laser methane sensing module is by laser reflection plate reflected light signal, and the laser detector of described laser methane sensing module receives laser reflection plate reflection laser signal;
The laser detector of described laser methane sensing module receives the laser signal of laser reflection plate reflection, and is transferred to spectral analysis module;
The spectrum change of the light signal that described spectral analysis module analysis receives, is demonstrated the concentration value of methane by display module;
Described spectral analysis module judges whether affiliated methane detection zone has methane to leak, and sends sound, light and vibration alarming signal by alarm module in the situation that being determined with methane leakage.
Concrete, described Handheld laser remote methane monitor comprises battery charging module, described battery charging module is for charging to battery; Preferably, while being charged as battery discharge to critical under-voltage condition described in
.。
Concrete, described Handheld laser remote methane monitor comprises voltage transformation module, described voltage transformation module is for battery charging module; Preferably, cell voltage conversion is stabilized in 3.3V voltage by described voltage transformation module.
Concrete, the optical maser wavelength of described Handheld laser remote methane monitor transmitting is 1.650 μ m, energy < 10mw, live width 2MHz.
Described laser reflection plate is that gold-plated infrared external reflection Target Board is called for short laser reflection plate, and high diffuse reflectance reaches as high as 99%, extends one times of measuring distance, supports cambered surface laser reflection and multi-angle laser reflection.
For solving the problems of the technologies described above, another kind of technical scheme provided by the invention is: a kind of methane leakage detection method is provided, comprises:
Excitation laser signal, aims at reflecting plate by described laser signal;
Launch described excitation laser light beam, wherein, through there is methane gas Leak Detection district reflecting plate in the light path of described excitation laser light beam;
Reflection is through the laser beam in methane Leak Detection district;
Receive the reflect beams of laser light through methane Leak Detection district, obtain target laser signal;
Analyze the spectrum of described target laser signal, demonstrate the concentration value of methane according to the spectrum change display module of target laser signal, judge whether methane Leak Detection district has methane to leak, and send sound, light and vibration alarming signal by alarm module in the situation that being determined with methane leakage.
Concrete, may there is the region that methane gas leaks in the detectable many places of Handheld laser remote methane monitor.
(3) beneficial effect
Be different from background technology, the invention provides a kind of Handheld laser methane gas reflecting plate leak detecting device, be provided with Handheld laser remote methane monitor and laser reflection plate, due to being fixed in advance, reflecting plate may there is the region that methane gas leaks, be beneficial to the reflection source that receives laser reflection plate, be convenient to search Leakage Gas point, meet methane gas completely and leak the demand detecting in application, the methane that the laser signal that the present invention mainly launches by Handheld laser remote methane monitor can be leaked blocks partition, Laser emission plate reflection loss laser signal or reflection are less than laser signal, cause Handheld laser remote methane monitor to receive decay laser signal or the principle without laser signal, determine by Laser emission Board position the region that methane leaks, realize rapidly and accurately the passive detection that methane leaks.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is space of the present invention schematic diagram;
Fig. 3 is schematic flow sheet of the present invention.
Embodiment
For making object of the present invention, content and advantage clearer, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.Refer to Fig. 1 and Fig. 2, present embodiment provides a kind of Handheld laser methane gas reflecting plate leak detecting device, comprise laser reflection plate 1, Handheld laser remote methane monitor 2, because being fixed in advance, reflecting plate 1 may there is the region 9 that methane gas leaks, therefore while there is methane gas leakage, be convenient to search Leakage Gas point.Therefore described laser reflection plate 1 is arranged on the position 9 that methane gas leakage may occur, described Handheld laser remote methane monitor 2 comprises battery charging module 3, voltage transformation module 4, laser methane sensing module 5, spectral analysis module 7, display module 6 and alarm module 8, described laser methane sensing module 5 also comprises laser instrument, laser detector, the laser instrument Output of laser signal of described laser methane sensing module 5 is by laser reflection plate 1 reflected light signal, the laser detector of described laser methane sensing module 5 receives the laser signal that laser reflection plate 1 reflects, and be transferred to spectral analysis module 7, described spectral analysis module 7 is analyzed the spectrum change of the light signal receiving, demonstrated the concentration value of methane by display module 6, described spectral analysis module 7 judges whether affiliated methane detection zone has methane to leak, and send sound by alarm module 8 in the situation that being determined with methane leakage, light and vibration alarming signal.Concrete, the optical maser wavelength that Handheld laser remote methane monitor 2 is launched is 1.650 μ m, energy < 10mw, live width 2MHz, and power consumption is little, and cost is low.Concrete, described Handheld laser remote methane monitor 2 comprises battery charging module 3, and described battery charging module 3 is for to battery charging, described in while being charged as battery discharge to critical under-voltage condition
., concrete, described Handheld laser remote methane monitor 2 comprises voltage transformation module 4, and described voltage transformation module 4 is for battery charging module, and cell voltage conversion is stabilized in 3.3V voltage by described voltage transformation module 4.
More preferred, refer to Fig. 2, in order further spatially to determine the position range of gas leakage, the described region 9 that methane gas leakage may occur is installed in advance and is fixed the first laser reflection plate 1 and the second Laser emission plate 10, described Handheld laser remote methane monitor 2 can detect respectively the first laser reflection plate 1 and the second Laser emission plate 10, and the principle of work of present embodiment is as follows.
Refer to Fig. 3, present embodiment provides a kind of methane leakage detection method based on a kind of Handheld laser methane gas reflecting plate leak detecting device, the method originates in step S401, Handheld laser remote methane monitor 2 triggers laser excitation module 5 excitation laser signals, and described laser signal is aimed at reflecting plate by laser excitation module 5.
Step S402, launches described excitation laser light beam, and wherein, the light path of described excitation laser light beam is through methane gas Leak Detection district 9 reflecting plates 1 may occur.
Step S403, reflection is through the laser beam in methane Leak Detection district 9.
Step S404, receives the reflect beams of laser light through methane Leak Detection district 9, obtains target laser signal.
Step S405, analyze the spectrum of described target laser signal, judging according to the spectrum change of target laser signal whether this monitoring point has by methane blocks or blocks, thereby judge whether methane Leak Detection district has methane to leak, display module demonstrates the concentration value of methane, and in the situation that being determined with methane leakage, thereby limit the point that corresponding methane leaks, meanwhile, also can send sound, light and vibration alarming signal by Handheld laser remote methane monitor 2 alarm modules 8, notify relevant staff to carry out explosion-proof work.In the present embodiment, reflecting plate 1 is fixed in advance the region 9 that methane gas leaks may occur, be beneficial to the reflection source that receives laser reflection plate 1, be convenient to search Leakage Gas point, meet methane gas completely and leak the demand detecting in application, can solve the problem of mentioning in background technology.Ability technician it should be understood that, the methane in other similar large-scale places detects all can apply technical scheme of the present invention, can also be widely used in colliery, tunnel and various underground works, natural gas line leak detection etc. needs emphasis to strengthen all indoor and outdoor surroundingses such as monitoring, strick precaution.Certainly the gas that need to monitor for other is as CO, SO
2deng, also can thought according to the present invention convert, belong to protection scope of the present invention.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. a Handheld laser methane gas reflecting plate leak detecting device, is characterized in that, comprising: laser reflection plate, Handheld laser remote methane monitor, and described laser reflection plate is arranged on the position that methane gas leakage may occur; Described Handheld laser remote methane monitor comprises battery charging module, voltage transformation module, laser methane sensing module, spectral analysis module, display module and alarm module, described laser methane sensing module also comprises laser instrument, laser detector, the laser instrument Output of laser signal of described laser methane sensing module is by laser reflection plate reflected light signal, and the laser detector of described laser methane sensing module receives the laser signal of laser reflection plate reflection;
The laser detector of described laser methane sensing module receives the laser signal of laser reflection plate reflection, and is transferred to spectral analysis module;
The spectrum change of the light signal that described spectral analysis module analysis receives, is demonstrated the concentration value of methane by display module;
Described spectral analysis module judges whether affiliated methane detection zone has methane to leak, and sends sound, light and vibration alarming signal by alarm module in the situation that being determined with methane leakage.
2. a kind of Handheld laser methane gas reflecting plate leak detecting device according to claim 1, is characterized in that, described Handheld laser remote methane monitor comprises battery charging module, and described battery charging module is for charging to battery; While being charged as battery discharge to critical under-voltage condition; Handheld laser remote methane monitor comprises voltage transformation module, and described voltage transformation module is for battery charging module; Cell voltage conversion is stabilized in 3.3V voltage by voltage transformation module.
3. a kind of Handheld laser methane gas reflecting plate leak detecting device according to claim 1, is characterized in that, the optical maser wavelength of described Handheld laser remote methane monitor is 1.650 μ m, energy < 10mw, live width 2MHz.
4. a kind of Handheld laser methane gas reflecting plate leak detection apparatus according to claim 1, it is characterized in that, described laser reflection plate is that gold-plated infrared external reflection Target Board is called for short laser reflection plate, high diffuse reflectance reaches as high as 99%, extend one times of measuring distance, support cambered surface laser reflection and multi-angle laser reflection.
5. a kind of Handheld laser methane gas reflecting plate leak detecting device according to claim 1, implementation step is characterised in that, comprising:
Excitation laser signal, aims at reflecting plate by described laser signal;
Launch described excitation laser light beam, wherein, through there is methane gas Leak Detection district reflecting plate in the light path of described excitation laser light beam;
Reflection is through the laser beam in methane Leak Detection district;
Receive the reflect beams of laser light through methane Leak Detection district, obtain target laser signal;
Analyze the spectrum of described target laser signal, demonstrate the concentration value of methane according to the spectrum change display module of target laser signal, judge whether methane Leak Detection district has methane to leak, and send sound, light and vibration alarming signal by alarm module in the situation that being determined with methane leakage.
6. methane leakage detection method according to claim 5, is characterized in that, the region that methane gas leaks may occur the detectable many places of Handheld laser remote methane monitor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410151304.8A CN103884477A (en) | 2014-04-16 | 2014-04-16 | Handheld type laser methane gas baffle board leakage detecting device |
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| CN201410151304.8A CN103884477A (en) | 2014-04-16 | 2014-04-16 | Handheld type laser methane gas baffle board leakage detecting device |
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Cited By (9)
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| CN104101571A (en) * | 2014-07-27 | 2014-10-15 | 北京航星网讯技术股份有限公司 | Methane gas detecting method and device with laser distance-measuring function |
| CN104122054A (en) * | 2014-07-27 | 2014-10-29 | 北京航星网讯技术股份有限公司 | Infrared thermal imaging type laser gas leak detection method and apparatus |
| CN105699016A (en) * | 2016-03-14 | 2016-06-22 | 国家电网公司 | Total reflection-based converting plant coolant leakage detection system and detection method |
| CN106290207A (en) * | 2016-07-21 | 2017-01-04 | 青岛博睿光电科技有限公司 | The foul gas of a kind of open path formula monitors apparatus and method of tracing to the source |
| CN109632701A (en) * | 2019-01-10 | 2019-04-16 | 北京航星网讯技术股份有限公司 | The laser gas detection device for having compensated distance function and concentration offsets function |
| CN109827075A (en) * | 2019-04-04 | 2019-05-31 | 常德市鼎城九申管道燃气有限公司 | A kind of method of the contactless remote detection leakage of pair of outdoor aerial gas pipeline |
| US10408701B2 (en) | 2014-08-01 | 2019-09-10 | Cascade Technologies Holdings Limited | Leak detection system |
| CN113029454A (en) * | 2021-02-03 | 2021-06-25 | 北京戴纳实验科技有限公司 | Indoor gas leakage monitoring method and system |
| CN114279964A (en) * | 2021-12-29 | 2022-04-05 | 数量级(上海)信息技术有限公司 | Laser methane leakage monitor and methane leakage monitoring method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101571A (en) * | 2014-07-27 | 2014-10-15 | 北京航星网讯技术股份有限公司 | Methane gas detecting method and device with laser distance-measuring function |
| CN104122054A (en) * | 2014-07-27 | 2014-10-29 | 北京航星网讯技术股份有限公司 | Infrared thermal imaging type laser gas leak detection method and apparatus |
| US10408701B2 (en) | 2014-08-01 | 2019-09-10 | Cascade Technologies Holdings Limited | Leak detection system |
| CN105699016A (en) * | 2016-03-14 | 2016-06-22 | 国家电网公司 | Total reflection-based converting plant coolant leakage detection system and detection method |
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| CN113029454A (en) * | 2021-02-03 | 2021-06-25 | 北京戴纳实验科技有限公司 | Indoor gas leakage monitoring method and system |
| CN113029454B (en) * | 2021-02-03 | 2023-02-28 | 北京戴纳实验科技有限公司 | Indoor gas leakage monitoring method and system |
| CN114279964A (en) * | 2021-12-29 | 2022-04-05 | 数量级(上海)信息技术有限公司 | Laser methane leakage monitor and methane leakage monitoring method |
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