CN105203485B - The detection means and method of indoor gas - Google Patents
The detection means and method of indoor gas Download PDFInfo
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- CN105203485B CN105203485B CN201510757319.3A CN201510757319A CN105203485B CN 105203485 B CN105203485 B CN 105203485B CN 201510757319 A CN201510757319 A CN 201510757319A CN 105203485 B CN105203485 B CN 105203485B
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Abstract
The invention provides the detection means of indoor gas and method, the detection means includes：An only light source is used to send pulsed optical signals and measurement light, and the wavelength for measuring light covers the absorption line of indoor under test gas；The pulsed optical signals reflected by indoor different reverberations that an only detector is used to receive are converted to first group of electric signal and will receive after the absorption of indoor under test gas and be converted to the second electric signal by the measurement light that indoor reflection thing reflects, and are sent to analysis module；The time difference that analysis module obtains first group of electric signal according to the detector draws distance d；And the content C of indoor under test gas is drawn according to absorption spectroscopy techniques.The present invention has high-precision, simple in construction, low cost and other advantages.
Description
Technical field
The present invention relates to photoelectric analysis, more particularly to indoor detection means and method.
Background technology
At present, remote methane moni tor is widely applied in natural gas leaking detection, the general principle that remote sensing instrument uses
For：By receiving, analyzing optical signal that is in region to be measured after gas absorption and being reflected by metope, so as to obtain on light path
Under test gas information.For the absolute concentration of the methane in quantitative expression region to be measured, remote sensing instrument need to be measured simultaneously to metope
Distance and the methane adsorption signal on this path.Traditional ranging light source use can launch the laser of 650nm light, detection
Device uses silicon materials, and the light source use of remote sensing instrument can launch the laser of 1651nm light, and detector uses indium gallium arsenic material.Should
Type remote sensing instrument has many deficiencies, such as：
1. it is complicated, it is necessary to be equipped with two sets of optical systems, ranging and absorption signal are respectively used to, is weighed 5 kilograms or so,
Such as U.S.'s Chinese, this remote sensing instrument weighs 5.8 kilograms；
2. it is not used to the detection of each layer indoor gas in building.For the indoor remote measurement with window, prior art without
Method determines windowpane to the distance of metope, namely can not obtain the gas content of interior；
Detection for more than two layers of indoor gas of building, existing remote sensing instrument are helpless.
The content of the invention
To solve the deficiency in above-mentioned prior art, the invention provides a kind of precision it is high, simple in construction, low into
Originally, the detection means for the indoor gas that application field is wide, function is strong.
The purpose of the present invention is achieved through the following technical solutions：
The detection means of indoor gas, the detection means of the indoor gas include：
One light source, an only light source are used to send pulsed optical signals and measurement light, and the wavelength of the measurement light covers
Cover the absorption line of indoor under test gas；
One detector, an only detector are used for the arteries and veins reflected by indoor different reverberations that will be received
Pulsed light signal is converted to first group of electric signal and will received after the absorption of indoor under test gas and anti-by indoor reflection thing
It is emitted back towards the measurement light come and is converted to the second electric signal, and is sent to analysis module；
Analysis module, the time difference that the analysis module obtains first group of electric signal according to the detector draw distance d；
And the content C of indoor under test gas is drawn according to absorption spectroscopy techniques：
D is distance of the indoor window to wall；K is calibration coefficient；b0For zero point coefficient；V2fSecond harmonic is absorbed for gas
The intensity of signal；V1fThe intensity of first harmonic signal is absorbed for gas；S (T) is the temperature change function of absorption line；B(P,T)
For absorption line temperature pressure compensation relation function.
According to the detection means of above-mentioned indoor gas, it is preferable that the under test gas is methane.
According to the detection means of above-mentioned indoor gas, alternatively, the detection means of the indoor gas further comprises：
Unmanned plane, one light source, detector are arranged on the unmanned plane.
According to the detection means of above-mentioned indoor gas, it is preferable that the analysis module is arranged on Control Room or monitoring car
It is interior；The electric signal of output is wirelessly sent to the analysis module by the detector.
According to the detection means of above-mentioned indoor gas, it is preferable that one light source is laser.
The present invention also aims to provide a kind of inspection of wide, the powerful indoor gas of high accuracy, application field
Survey method, the goal of the invention are achieved by the following technical programs：
The detection method of indoor gas, the detection method of the indoor gas comprise the following steps：
(A1) an only light source sends pulsed optical signals, and the pulsed optical signals are respectively by the window and wall of interior
Reflection, is received and converted to first group of electric signal, and be sent to analysis module by an only detector；
The measurement light that one light source is sent injects interior, and the measurement light after under test gas absorbs is anti-by the wall
Penetrate, the second electric signal is received and converted to by one detector, and be sent to analysis module；
(A2) analysis module obtains time difference of first group of electric signal according to the detector and draws distance d；And according to
Absorption spectroscopy techniques draw the content C of indoor under test gas：
D is distance of the indoor window to wall；K is calibration coefficient；b0For zero point coefficient；V2fSecond harmonic is absorbed for gas
The intensity of signal；V1fThe intensity of first harmonic signal is absorbed for gas；S (T) is the temperature change function of absorption line；B(P,T)
For absorption line temperature pressure compensation relation function.
According to the detection method of above-mentioned indoor gas, alternatively, in step (A1), unmanned plane carries one light
Source, detector simultaneously fly to outdoor, and the light that one light source is sent is injected indoor.
According to the detection method of above-mentioned indoor gas, it is preferable that the analysis module is arranged on Control Room or monitoring car
It is interior；The electric signal of output is wirelessly sent to the analysis module by the detector.
According to the detection method of above-mentioned indoor gas, it is preferable that the analysis module is arranged on the unmanned plane, is led to
Cross wireless mode and the content C of the under test gas is sent to Control Room or monitoring car.
According to the detection method of above-mentioned indoor gas, alternatively, the detection method of the indoor gas further comprises
Following steps：
(A3) if the content C of under test gas is not zero, and it is in increasing trend, prompts alarm, and content information is sent to
On the communication terminal of owner.
According to the detection method of above-mentioned indoor gas, it is preferable that the under test gas is methane.
Compared with prior art, the device have the advantages that being：
1. accuracy of detection is high
Indoor window is measured exactly to metope using only a set of optical system (only one light source, a detector)
Distance, that is, the content of indoor under test gas can be measured exactly；
It is 2. simple in construction, inexpensive
Using only a set of optical system can measure indoor window to the distance of metope and optical path under test gas
Absorption to measuring light, significantly reduces the complexity and cost of remote sensing instrument, degree can be safeguarded by improving；
3. application field is wide
Only a set of optical system is arranged on unmanned plane, unmanned plane flies to different height, so as to pass through remote measurement
The content of indoor gas in different floors is measured, has expanded application field；
It is 4. powerful
The content information measured can be sent on the communication terminal of owner in real time, know indoor gas even in will also realize that outside
Content, natural gas leaking information is found early, exclude potential safety hazard.
Brief description of the drawings
Referring to the drawings, the disclosure will be easier to understand.Skilled addressee readily understands that be：This
A little accompanying drawings are used only for illustrating technical scheme, and are not intended to and protection scope of the present invention is construed as limiting.
In figure：
Fig. 1 is the basic block diagram of the detection means of indoor gas according to embodiments of the present invention.
Embodiment
Fig. 1 and following description describe the present invention optional embodiment with instruct those skilled in the art how to implement and
Reproduce the present invention.In order to instruct technical solution of the present invention, simplify or eliminate some conventional aspects.Those skilled in the art should
The understanding is derived from the modification of these embodiments or replacement will within the scope of the invention.Under those skilled in the art should understand that
Stating feature can combine to form multiple modifications of the present invention in a variety of ways.Thus, the invention is not limited in following optional
Embodiment, and only limited by claim and their equivalent.
Embodiment 1：
Fig. 1 schematically illustrates the basic block diagram of the detection means of the indoor gas of the embodiment of the present invention, such as Fig. 1 institutes
Show, the detection means of the indoor gas includes：
One light source, an only light source are used to send pulsed optical signals and measurement light, and the wavelength of the measurement light covers
Cover the absorption line of indoor under test gas (such as methane, the main component of natural gas is methane)；The light source preferred semiconductor swashs
Light device；
One detector, an only detector are used for the arteries and veins reflected by indoor different reverberations that will be received
Pulsed light signal is converted to first group of electric signal and will received after the absorption of indoor under test gas and anti-by indoor reflection thing
It is emitted back towards the measurement light come and is converted to the second electric signal, and is sent to analysis module；
Analysis module, the time difference that the analysis module obtains first group of electric signal according to the detector draw distance d；
And the content C of indoor under test gas is drawn according to absorption spectroscopy techniques：
D is distance of the indoor window to wall；K is calibration coefficient；b0For zero point coefficient；V2fSecond harmonic is absorbed for gas
The intensity of signal；V1fThe intensity of first harmonic signal is absorbed for gas；S (T) is the temperature change function of absorption line；B(P,T)
For absorption line temperature pressure compensation relation function.
In order to detect the content of different floor indoor gas, further, the detection means of the indoor gas is further
Including：
Unmanned plane, one light source, detector are arranged on the unmanned plane, and unmanned plane flies to different story heights
Degree, so as to detect the content of different floor indoor gas.
In order to reduce the loading capacity of unmanned plane to improve the endurance of unmanned plane, further, the analysis module is set
Put in-car in Control Room or monitoring；The electric signal of output is wirelessly sent to the analysis module by the detector.
The detection method of the indoor gas of the embodiment of the present invention, namely the course of work of above-mentioned detection device, the interior
The detection method of gas comprises the following steps：
(A1) an only light source sends pulsed optical signals, and the pulsed optical signals are respectively by the window and wall of interior
Reflection, is received and converted to first group of electric signal, and be sent to analysis module by an only detector；
The measurement light that one light source is sent injects interior, and (such as methane, the principal component of natural gas is first under test gas
Alkane) absorb after measurement light by the wall reflection, the second electric signal is received and converted to by one detector, and transmit
To analysis module；
(A2) analysis module obtains time difference of first group of electric signal according to the detector and draws distance d；And according to
Absorption spectroscopy techniques draw the content C of indoor under test gas：
D is distance of the indoor window to wall；K is calibration coefficient；b0For zero point coefficient；V2fSecond harmonic is absorbed for gas
The intensity of signal；V1fThe intensity of first harmonic signal is absorbed for gas；S (T) is the temperature change function of absorption line；B(P,T)
For absorption line temperature pressure compensation relation function.
In order to detect the content of different floor indoor gas, further, unmanned plane carries one light source, detector
And outdoor is flown to, the light that one light source is sent is injected indoor.
In order to reduce the loading capacity of unmanned plane to improve the endurance of unmanned plane, further, the analysis module is set
Put in-car in Control Room or monitoring；The electric signal of output is wirelessly sent to the analysis module by the detector.
For the big unmanned plane of loading capacity, in order to reduce complexity, the analysis module can be arranged on the unmanned plane,
The content C of the under test gas is wirelessly sent to Control Room or monitoring car.
In order to allow owner to grasp indoor safe condition, the potential safety hazards such as natural gas leaking, further, institute are found early
The detection method for stating indoor gas further comprises the steps：
(A3) if the content C of under test gas is not zero, and it is in increasing trend, prompts alarm, and content information is sent to
On the communication terminal of owner.
Embodiment 2：
According to embodiments of the present invention 1 detection means and method is in each layer room of residential building in natural gas leaking detection
Application examples.
In the application examples, an only light source uses Distributed Feedback Laser, and the wavelength for measuring light is (corresponding including 1651nm
To the absorption line of methane)；The drive circuit of laser exports pulsed current signal and continuous current signal to laser so that
Laser sends pulse for ranging optical signal, and the continuous optical signal of detection Absorption；An only detector
Using indium gallium arsenic material；Unmanned plane uses big boundary unmanned plane, and a light source and detector are arranged on unmanned plane；It is saturating using assembling
Mirror is collected by window and the light of wall reflection, and the light after convergence is received by a detector；Analysis module is arranged on monitoring in-car,
Radio communication is used between analysis module and detector, analysis module is using pulse signal respectively by after window, wall reflection
Reflected light reaches the time difference Δ t of detector and draws window to the distance of wallC is the light velocity.
In the course of work of detection means：
Under the control of unmanned aerial vehicle (UAV) control software, unmanned plane flies to different floors, the pulsed light that laser is sent respectively by
Window and wall reflection, the time that reflected light reaches detector is different, and first group of electric signal of output is sent to analysis module；
Continuous light that laser is sent is injected indoor, is absorbed by indoor gas, and by wall reflection, by analyzing detector
The change of the intensity of the measurement light of the absorption line corresponding to methane received, the second electric signal of output is wirelessly
It is sent to analysis module；
The time difference for the reflected light signal that analysis module is received using detector obtains window to the distance d of wall, enters
And according to formulaObtain methane content；
If the content C of under test gas is not zero, and is in increasing trend, alarm is prompted, and content information is sent to owner
Communication terminal on, so as to owner's timely processing, exclude natural gas leaking hidden danger.
Above-described embodiment is only exemplarily to give the situation for detecting indoor Methane in Air, be can also be certainly other
Gas, such as benzene homologues, formaldehyde, coal gas are poisonous, pernicious gas and flammable explosive gas, come for those skilled in the art
Say, the specific embodiment mode of these gases detection, is that need not pay creativeness can obtain on the basis of above-described embodiment
Go out.
Claims (10)
1. the detection means of indoor gas, it is characterised in that：The detection means of the indoor gas includes：
One light source, an only light source are used to send pulsed optical signals and measurement light, the wavelength covering room of the measurement light
The absorption line of interior under test gas；
One detector, an only detector are used for the pulsed light reflected by indoor different reverberations that will be received
Signal is converted to first group of electric signal and will receive after the absorption of indoor under test gas and be reflected back by indoor reflection thing
The measurement light come is converted to the second electric signal, and is sent to analysis module；
Analysis module, the time difference that the analysis module obtains first group of electric signal according to the detector draws distance d, described
Time difference is respectively by the difference of the time of the pulsed optical signals arrival detector after window and indoor wall reflection；And root
The content C of indoor under test gas is drawn according to absorption spectroscopy techniques：
<mrow>
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<mi>V</mi>
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<mi>f</mi>
</mrow>
</msub>
<mrow>
<mn>2</mn>
<mi>K</mi>
<mo>&CenterDot;</mo>
<mi>d</mi>
<mo>&CenterDot;</mo>
<msub>
<mi>V</mi>
<mrow>
<mn>1</mn>
<mi>f</mi>
</mrow>
</msub>
<mo>&CenterDot;</mo>
<mi>S</mi>
<mrow>
<mo>(</mo>
<mi>T</mi>
<mo>)</mo>
</mrow>
<mo>&CenterDot;</mo>
<mi>B</mi>
<mrow>
<mo>(</mo>
<mi>P</mi>
<mo>,</mo>
<mi>T</mi>
<mo>)</mo>
</mrow>
</mrow>
</mfrac>
<mo>-</mo>
<msub>
<mi>b</mi>
<mn>0</mn>
</msub>
</mrow>
D is distance of the indoor window to wall；K is calibration coefficient；b0For zero point coefficient；V2fSecond harmonic signal is absorbed for gas
Intensity；V1fThe intensity of first harmonic signal is absorbed for gas；S (T) is the temperature change function of absorption line；B (P, T) is suction
Receive spectral line temperature pressure compensation relation function.
2. the detection means of indoor gas according to claim 1, it is characterised in that：The under test gas is methane.
3. the detection means of indoor gas according to claim 1, it is characterised in that：The detection means of the indoor gas
Further comprise：
Unmanned plane, one light source, detector are arranged on the unmanned plane.
4. the detection means of indoor gas according to claim 3, it is characterised in that：The analysis module is arranged on monitoring
Room or monitoring are in-car；The electric signal of output is wirelessly sent to the analysis module by the detector.
5. the detection means of indoor gas according to claim 1, it is characterised in that：One light source is laser.
6. the detection method of indoor gas, the detection method of the indoor gas comprises the following steps：
(A1) an only light source sends pulsed optical signals, and the pulsed optical signals are anti-by the window of interior and wall respectively
Penetrate, first group of electric signal is received and converted to by an only detector, and be sent to analysis module；
The measurement light that one light source is sent injects indoor, the absorption spectra of the indoor under test gas of wavelength covering of the measurement light
Line, under test gas absorb after measurement light by the wall reflection, the second telecommunications is received and converted to by one detector
Number, and it is sent to analysis module；
(A2) analysis module obtains time difference of first group of electric signal according to the detector and draws distance d；And according to absorption
Spectral technique draws the content C of indoor under test gas：
<mrow>
<mi>C</mi>
<mo>=</mo>
<mfrac>
<msub>
<mi>V</mi>
<mrow>
<mn>2</mn>
<mi>f</mi>
</mrow>
</msub>
<mrow>
<mn>2</mn>
<mi>K</mi>
<mo>&CenterDot;</mo>
<mi>d</mi>
<mo>&CenterDot;</mo>
<msub>
<mi>V</mi>
<mrow>
<mn>1</mn>
<mi>f</mi>
</mrow>
</msub>
<mo>&CenterDot;</mo>
<mi>S</mi>
<mrow>
<mo>(</mo>
<mi>T</mi>
<mo>)</mo>
</mrow>
<mo>&CenterDot;</mo>
<mi>B</mi>
<mrow>
<mo>(</mo>
<mi>P</mi>
<mo>,</mo>
<mi>T</mi>
<mo>)</mo>
</mrow>
</mrow>
</mfrac>
<mo>-</mo>
<msub>
<mi>b</mi>
<mn>0</mn>
</msub>
</mrow>
D is distance of the indoor window to wall；K is calibration coefficient；b0For zero point coefficient；V2fSecond harmonic signal is absorbed for gas
Intensity；V1fThe intensity of first harmonic signal is absorbed for gas；S (T) is the temperature change function of absorption line；B (P, T) is suction
Receive spectral line temperature pressure compensation relation function.
7. the detection method of indoor gas according to claim 6, it is characterised in that：In step (A1), unmanned plane is taken
With one light source, detector and outdoor is flown to, the light that one light source is sent is injected indoor.
8. the detection method of indoor gas according to claim 7, it is characterised in that：The analysis module is arranged on monitoring
Room or monitoring are in-car；The electric signal of output is wirelessly sent to the analysis module by the detector.
9. the detection method of indoor gas according to claim 7, it is characterised in that：The analysis module is arranged on described
On unmanned plane, the content C of the under test gas is wirelessly sent to Control Room or monitoring car.
10. the detection method of indoor gas according to claim 6, it is characterised in that：The detection side of the indoor gas
Method further comprises the steps：
(A3) if the content C of under test gas is not zero, and it is in increasing trend, prompts alarm, and content information is sent to owner
Communication terminal on.
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| CN106597457A (en) * | 2016-11-08 | 2017-04-26 | 上海禾赛光电科技有限公司 | Spectrum technology-based distance measuring instrument and distance measuring method |
| CN106644937B (en) * | 2016-11-08 | 2019-05-28 | 上海禾赛光电科技有限公司 | The method of telemetering of gas leakage in building |
| CN110806396A (en) * | 2019-11-19 | 2020-02-18 | 国网重庆市电力公司电力科学研究院 | Gas concentration compensation device and method |
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| JPH06241991A (en) * | 1993-02-19 | 1994-09-02 | Kubota Corp | Spectroanalyzer |
| CN201367919Y (en) * | 2009-01-09 | 2009-12-23 | 武汉电信器件有限公司 | Multipoint online detecting device for coal mine gas |
| CN101694265A (en) * | 2009-09-29 | 2010-04-14 | 中国科学院上海技术物理研究所 | Real-time concentration calibration method of leakage detecting laser radar for on-board natural gas pipeline |
| CN103575695B (en) * | 2012-07-20 | 2015-12-09 | 无锡凯睿传感技术有限公司 | A kind of the GN 2 oxide content pick-up unit |
| CN103728248A (en) * | 2012-10-11 | 2014-04-16 | 陕西杰创科技有限公司 | Apparatus for detecting methane concentration |
| CN103091266B (en) * | 2012-12-29 | 2015-01-14 | 聚光科技(杭州)股份有限公司 | Gas telemetering method with alarm function |
| WO2014201117A1 (en) * | 2013-06-11 | 2014-12-18 | Cirtemo, Lld | Fluorescence detection device, system, and process |
| CN103868884B (en) * | 2014-03-27 | 2016-06-15 | 清华大学 | A kind of GAS ABSORPTION rate On-line Measuring Method based on the index of modulation |
| CN204556499U (en) * | 2015-03-10 | 2015-08-12 | 北京农业智能装备技术研究中心 | The multi-channel high-speed data acquisition and processing system of tuning diode absorption spectrum |
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Address after: No.2 building, no.468 xinlai Road, Jiading District, Shanghai, 201821 Patentee after: Shanghai Hesai Technology Co., Ltd Address before: Room 306, building A4, 925 Yecheng Road, Jiading District, Shanghai, 201821 Patentee before: HESAI PHOTONICS TECHNOLOGY Co.,Ltd. |
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Address after: No.2 building, no.468 xinlai Road, Jiading District, Shanghai, 201821 Patentee after: Shanghai Hesai Technology Co.,Ltd. Address before: No.2 building, no.468 xinlai Road, Jiading District, Shanghai, 201821 Patentee before: Shanghai Hesai Technology Co., Ltd |
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