CN107356934A - Sulfur hexafluoride leakage detection method and device based on DIAL - Google Patents

Sulfur hexafluoride leakage detection method and device based on DIAL Download PDF

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Publication number
CN107356934A
CN107356934A CN201710661242.9A CN201710661242A CN107356934A CN 107356934 A CN107356934 A CN 107356934A CN 201710661242 A CN201710661242 A CN 201710661242A CN 107356934 A CN107356934 A CN 107356934A
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module
laser
gas
gis
value
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何怡刚
苏蓓蕾
陶琳
陈张辉
佐磊
张剑
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Hefei University of Technology
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Hefei University of Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

Sulfur hexafluoride leakage detection method and device based on DIAL, utilize DIAL technical monitoring gas insulated metal enclosed swit chgear（GIS）Middle SF6Gas leaks.Device includes power module, laser radar transmitter module, laser radar receiving module, message processing module, display and warning module；Power module is used to power；Laser radar transmitter module is used for circulation transmitting corresponding wavelength laser pulse beam successively；Laser radar receiving module is used to receive the laser pulse reflected by GIS, and the optical signal of reception is converted into electric signal, message processing module is sent to and is handled；Message processing module is handled signal, and SF is calculated6Gas leaks concentration value and leakage dot position information.The present invention can operate with gas insulated metal enclosed swit chgear SF in transformer station, power plant6Gas leakage monitoring；The detection method real-time is good, and precision is high, and long-range a wide range of detection can be achieved.

Description

Sulfur hexafluoride leakage detection method and device based on DIAL
Technical field
The present invention relates to SF6Leakage inspection field, Difference Absorption laser thunder is based on more particularly to one kind The sulfur hexafluoride leakage detection method and device reached.
Background technology
As people's living standard improves constantly, electric energy has become a part essential in daily life, people Requirement to electric energy also more and more higher, does not power off and weighs one of quality of power supply key factor.With SF6Gas is situated between as insulation Gas insulated metal enclosed swit chgear (GIS) equipment of matter is in power plant using very extensive, SF6Gas leakage contribution power equipment is normally transported OK, serious greenhouse effects, and SF are produced6Costly, a large amount of leakages can cause heavy economic losses to gas.Therefore SF6Gas The leak detection of body has very big practical value.
Application No. 201510751649.1, publication number 105424638A《A kind of indoor GIS device SF6Gas leakage inspection Survey method and its device》Propose a kind of SF based on infrared thermal imaging6Gas leak detection method, it is located at interior for detecting GIS device SF6Gas leaks.This detection method is only applicable to closely detect.Application No. 200820028339.2, it is public The number of opening 201166563Y《High pressure SF6Electrical equipment SF6Gaseous state on-Line Monitor Device》Propose it is a kind of based on gas pressure, The SF of the information such as temperature rise, humidity6Gas leak determination method, this detection method need the SF in high-tension electricity equipment6On air chamber Advance install sensor, operation is comparatively laborious, and needs to first pass through sensor and measure other correlatives, treated module ability It is converted into SF6Gas leaks concentration value, is not suitable for the occasion that measurement accuracy requires high.
Above two method, the former can not realize remote detection, and the latter's detection is cumbersome, measurement accuracy is not high, has There is certain limitation.
The content of the invention
Problem to be solved by this invention is to overcome the shortcomings of above-mentioned background technology, there is provided one kind is swashed based on Difference Absorption The sulfur hexafluoride leakage detection method and device of optical radar.
The present invention solves its technical problem and adopted the technical scheme that：
By SF6Gas sorbing characteristics spectrum is understood, is SF at 10.551 μm in wavelength6Gas has an obvious absorption Peak, peak value are 3.5 × 10–17cm2, and it is band segments, frequency band segment length from 10.4 μm to 10.6 μm that the peak value, which corresponds to Absorber Bandwidth, For 0.2 μm, Absorber Bandwidth is narrower.In SF6In gas sorbing characteristics spectral line, with absorption peak be close to absorb valley at wavelength For 10.696 μm, drastically decline absorbing line absorption value at valley, be 1.3 × 10–18cm2.Remember λonFor SF6Gas absorption spectrum The corresponding wavelength of peak-peak, λ in lineoffFor SF6It is close to ripple corresponding to the absorption low ebb of peak-peak in gas absorption spectrum line It is long.Choose suitable wavelength XonAnd λoff, measured, can reduced big as reference beam using absorbing wavelength laser at valley Optical instrument absorbs the influence for causing measurement accuracy to the optical maser wavelength in other materials and device in gas, improves measurement device essence Degree.SF6Gas absorption peak is big, and the difference of absorption peak and absorption valley is big, easily distinguishes the corresponding suction of laser pulse of reflection Still the wavelength at valley is absorbed at receipts peak value, improves measurement device precision.SF6Gas absorption peak is big, narrow bandwidth meets to swash Optical radar can carry out SF to gas absorption wavelength and bandwidth requirement using DIAL technology6Gas Leak detection, SF is detected using this method6The basic goal of gas leakage is the value for calculating concentration light path product.
Sulfur hexafluoride leakage detection method based on DIAL, step are as follows：
(1) according to SF6Gas sorbing characteristics spectrum, choose SF6The corresponding wavelength value of peak-peak in gas absorption spectrum line λonAnd SF6It is close to wavelength value λ corresponding to the absorption low ebb of peak-peak in gas absorption spectrum lineoff；
(2) it is λ that laser radar transmitter module circulates launch wavelength to GIS successivelyonAnd λoffLaser pulse beam；
(3) laser radar receiving module receives is transmitted back to the reflected laser pulse come by GIS, and by reflected laser pulse turn Change digital electric signal into；
(4) digital electric signal after message processing module processing conversion, calculates SF in GIS6Gas concentration value and leakage point Positional information.
Further, step (5) is may also include, the SF being calculated is shown on the electronic curtain of display and warning module6 Gas concentration value and leakage dot position information, as the SF of leakage6When gas concentration value exceedes given threshold, display and warning module Indicator lamp flicker, buzzer sends the sound, reaches alarm purpose.
Further, in the step (1), SF6Corresponding wavelength value (the abbreviation absworption peak of peak-peak in gas absorption spectrum line It is worth wavelength) λon10.551 μm are chosen for, SF6It is close to wavelength value corresponding to the absorption low ebb of peak-peak in gas absorption spectrum line (referred to as absorbing valley wavelength) λoffIt is chosen for 10.696 μm.
Further, in the step (4), the digital electric signal after message processing module processing conversion, SF in GIS is calculated6 Gas concentration value and leakage dot position information, it is specially：
Changed, obtained and λ by message processing moduleonAnd λoffReceived signal power P corresponding to respectivelyr(λon) and Pr (λoff)；By SF6Gas is in λonAnd λoffThe calculation formula of absorption coefficient and concentration the light path product at place, calculates SF in GIS6Gas The value CL of concentration light path product, then the value CL and laser to GIS distance R that are accumulated by concentration light path can calculate SF6Gas Concentration value.By constantly launching laser to different angle, the concentration value of SF6 gases under different angle is drawn, concentration value is bigger, more Close to leakage point, leakage point position can determine whether according to the difference of concentration value.
Further, changed by message processing module, obtain received signal power P corresponding with respective wavelength valuer, specifically Computational methods are as follows：
Received signal power
Wherein, PtRepresent laser transmission power, TaAtmospheric transmittance is represented, ρ represents target reflectivity, DrRepresent laser The receiving aperture (diameter) of device, ηtRepresent the transmitance of laser radar transmitter module, ηrRepresent the transmission of laser radar receiving module Rate, R represent the distance from laser to GIS.
SF in GIS6The value CL computational methods of gas concentration light path product are：
Concentration light path accumulates
Wherein, αonRepresent SF6The absorption coefficient of the strong absorbing wavelength of gas, αoffRepresent SF6The absorption of gas weak absorbing wavelength Coefficient, Pr(λoff) represent λoffReceived signal power, Pr(λon) represent λonReceived signal power.
SF in GIS6Gas concentration value C computational methods are：
Concentration value
Wherein, CL represents SF6The value of gas concentration light path product, R represent the distance from laser to GIS.
Implement the device of the sulfur hexafluoride leakage detection method based on DIAL as previously described, including power supply Module, laser radar transmitter module, laser radar receiving module, message processing module.
The power module uses lithium battery, at laser radar transmitter module, laser radar receiving module, information Manage module for power supply；
The laser radar transmitter module is used for repeat its transmission N (N >=2) per second (N preferably 20) secondary laser, and transmitting includes inhaling Receipts peak wavelength is λon=10.551 μm are λ with absorption valley wavelengthoff=10.696 μm of laser；
The laser radar receiving module is connected with message processing module；Laser radar receiving module is used to receive and passed through The reflected laser pulse that GIS is sent back, the optical signal received is converted into electric signal, and be sent at message processing module Reason；
Described information processing module is handled the electric signal after conversion, calculates SF in GIS6Gas leak concentration value and Leak dot position information.
SF based on DIAL6The device of leakage detection method also includes display and warning module, described Message processing module is connected with display and warning module.Power module is connected with display and warning module, by power module to Display and warning module power supply.
The display and warning module include electronic curtain, indicator lamp and buzzer.By display and warning module, will count The SF that point counting analysis is drawn6Gas leaks concentration value and leakage dot position information is shown on electronic curtain；And according to detection demand Pre-set SF6Gas leaks concentration threshold, works as SF6When gas leakage concentration value exceedes threshold value, indicator lamp flicker, buzzer hair Go out the sound, reach alarm purpose.
Without loss of generality, the electronic curtain of display and warning module uses LED electrical screens in the present invention, and buzzer uses Model TE-HPA17B-HB buzzer, indicator lamp use common light emitting diode, to reach alarm purpose.
Further, the SF based on DIAL6In gas leak detection apparatus, laser radar transmitting mould Block includes emission control module, laser tuning control module, laser；
Emission control module is connected with laser tuning control module, the emission control module carry out according to demand wake up and Relevant parameter configures, and laser tuning control module is carried out the preparation of the laser pulse beam of transmitting respective wavelength；
The laser tuning control module is connected with laser；It is λ that laser tuning, which is controlled for modulating generation corresponding wavelength,on And λoffLaser pulse beam；
The laser is used for the laser pulse beam tuned to GIS transmittings by laser tuning control module.
Without loss of generality, emission control module uses MSP430F149 chips in the present invention.Laser uses TEA CO2 Laser, launch Gaussian beam.
Further, laser radar receiving module includes receiving day in the device of the DIAL detection technique Line, photoelectric conversion module and pre-amplifier module；
The reception antenna is connected with photoelectric conversion module, and reception antenna is used to receive the laser arteries and veins reflected by GIS Punching；
The photoelectric conversion module is connected with pre-amplifier module, and photoelectric conversion module is used to convert optical signals to electricity Signal；
The pre-amplifier module is used to amplify ultra-weak electronic signal, is easy to follow-up data to handle；
Without loss of generality, photoelectric conversion module uses HTB-3100AB-25KM in the present invention.
Further, described information processing module is built-in with A/D modular converters, and A/D modular converters are used for analog signal number According to the digital signal data being converted into beneficial to computer disposal；Data signal after conversion is calculated by message processing module SF in GIS6The leakage concentration and leakage dot position information of gas.
Without loss of generality, A/D modular converters use ADC0809CCN chips in the present invention.Described information processing module can Pass through chip microcontroller.
The present invention's is based on DIAL SF6Leakage detection method and device have following functions：
(1) because SF6Gas absorption peak is big, narrow bandwidth, meets laser radar to gas absorption wavelength and bandwidth requirement, The detection technique can detect GIS SF6Gas leakage situation.
(2) because laser direction is good, monochromaticjty is good, DIAL technology can realize remote detection.
(3) SF based on DIAL of the present invention6By wireless between gas leak detection apparatus and GIS Connection, the detection means can detection gas leakage situations in all directions according to the actual requirements.
The present invention can operate with gas insulated metal enclosed swit chgear SF6 gas leakage monitorings in transformer station, power plant；The detection method is real When property is good, and precision is high, and long-range a wide range of detection can be achieved.
Brief description of the drawings
Fig. 1 is SF6Gas sorbing characteristics curve map；
Fig. 2 is the SF based on DIAL of the present invention6The apparatus structure schematic diagram of leak detection；
Fig. 3 is laser radar transmitter module structural representation in Fig. 2 shown devices；
Fig. 4 is laser radar receiving module structural representation in Fig. 2 shown devices.
Embodiment
Below in conjunction with drawings and examples, the invention will be further described.
Reference picture 1, the SF based on DIAL6Detection technique detects GIS SF6Gas leaks, SF6Gas There is its intrinsic absorption characteristic spectrum；SF6Gas absorption peak is big, and absorption peak and the difference for absorbing valley are big, easy area Point by GIS be transmitted back to come reflected laser pulse, raising measurement device precision.SF6Gas absorption peak is big, narrow bandwidth, meets DIAL is for gas absorption wavelength and bandwidth requirement, using in DIAL technology for detection GIS SF6When gas leaks, transmitting corresponding wavelength is λon=10.551 μm and λoff=10.696 μm of laser pulse beam is examined Survey.Concrete operation step is as follows：
(1) according to SF6Gas sorbing characteristics spectrum, selection wavelength value are λon=10.551 μm, λoff=10.696 μm；
(2) when needing detection, it is λ that laser radar transmitter module circulates launch wavelength to GIS successivelyonAnd λoffLaser Pulsed beams；
(3) laser radar receiving module receives is transmitted back to the reflected laser pulse come by GIS, and by reflected laser pulse turn Change digital electric signal into；
(4) digital electric signal after message processing module processing conversion, calculates SF in GIS6Gas concentration value and leakage point Positional information, it is specially：
Changed, obtained and λ by message processing moduleonAnd λoffReceived signal power P corresponding to respectivelyr(λon) and Pr (λoff)；By SF6Gas is in λonAnd λoffThe calculation formula of absorption coefficient and concentration the light path product at place, calculates SF in GIS6Gas The value CL of concentration light path product, then the value CL and laser to GIS distance R that are accumulated by concentration light path can calculate SF6Gas Concentration value.By constantly launching laser to different angle, the concentration value of SF6 gases under different angle is drawn, concentration value is bigger, more Close to leakage point, leakage point position can determine whether according to the difference of concentration value；
(5) SF being calculated by (4) is shown on the electronic curtain of display and warning module6Gas leak concentration value and Dot position information is leaked, as the SF of leakage6When gas concentration value exceedes given threshold, the indicator lamp of display and warning module dodges Bright, buzzer sends the sound, carries out alarm operation.
In the step 4, changed by message processing module, obtain received signal power corresponding with respective wavelength value Pr, circular is as follows：
Received signal power
Wherein, PtRepresent laser transmission power, TaAtmospheric transmittance is represented, ρ represents target reflectivity, DrRepresent laser The receiving aperture (diameter) of device, ηtRepresent the transmitance of laser radar transmitter module, ηrRepresent the transmission of laser radar receiving module Rate, R represent the distance from laser to GIS.
SF in GIS6The value CL computational methods of gas concentration light path product are：
Concentration light path accumulates
Wherein, αonRepresent SF6The absorption coefficient of the strong absorbing wavelength of gas, αoffRepresent SF6The absorption of gas weak absorbing wavelength Coefficient, Pr(λoff) represent λoffReceived signal power, Pr(λon) represent λonReceived signal power.
SF in GIS6Gas concentration value C computational methods are：
Concentration value
Wherein, CL represents SF6The value of gas concentration light path product, R represent the distance from laser to GIS.
Reference picture 2, the SF based on DIAL of the present invention6Leak detecting device U include power module U0, Laser radar transmitter module U1, laser radar receiving module U2, message processing module U3, display and warning module U4；
Power module U0 uses lithium battery, for laser radar transmitter module U1, laser radar receiving module U2, information Processing module U3, display and warning module U4 power supplies；
Laser radar transmitter module U1 is connected with GIS U5, and laser radar transmitter module U1 circulates transmitting successively to GIS U5 Repetition rate per second is 20 laser pulse, and absorption peak in laser, to absorb valley corresponding wavelength be respectively λon=10.551 μm And λoff=10.696 μm；
Laser radar receiving module U2 is connected with message processing module U3；Laser radar receiving module U2 is received from GIS U5 The reflected laser pulse come is sent back, the optical signal received is converted into electric signal, is sent to message processing module U3 processing；
Message processing module U3 is connected with display and warning module U4, the GIS being calculated by message processing module U3 SF in U56Gas leaks concentration value and leakage dot position information, and sends display and warning module U4 to.Display and warning module U4 includes electronic curtain, indicator lamp and buzzer.Pass through display and warning module U4, the SF that will be calculated6Gas leakage is dense Angle value and leakage dot position information are shown on electronic curtain；Pre-set a SF6Gas leaks concentration threshold, works as SF6Gas When leakage concentration exceedes the threshold value, indicator lamp flicker, buzzer rings, reach alarm purpose.
Reference picture 3, the SF based on DIAL of the present invention6Laser radar is launched in leak detecting device U Module U1 includes emission control module U10, laser tuning control module U11, laser U12；
Emission control module U10 is connected with laser tuning control module U11, and emission control module U10 is used to be waken up Configured with relevant parameter, make the laser pulse beam of laser tuning control module U11 preparations transmitting respective wavelength；
Laser tuning control module U11 is connected with laser U12；Laser tuning control module U11, which is used to modulate, to be produced often Second is repeated 20 times, corresponding wavelength λon=10.551 μm and λoff=10.696 μm of laser pulse beam；
Laser U12 launches the laser pulse beam as caused by laser tuning control module U11 modulation to GIS U5.
The laser U12 and GIS U5 wireless connections.
Reference picture 4, the SF based on DIAL of the present invention6Laser radar receives in leak detecting device U Module U2 includes reception antenna U20, photoelectric conversion module U21 and pre-amplifier module U22；
Reception antenna U20 is connected with photoelectric conversion module U21, and reception antenna U20 is used to receive the laser reflected by GIS Arteries and veins, and be sent to photoelectric conversion module U21 and be converted into electric signal；
Photoelectric conversion module U21 is connected with pre-amplifier module U22, and pre-amplifier module U22 is used to amplify by light The ultra-weak electronic signal of electric modular converter U21 conversions.
Those skilled in the art can carry out various modifications and variations to the present invention, if these modifications and variations are at this Within the scope of invention claim and its equivalent technologies, then these modifications and variations are also within protection scope of the present invention.
The prior art that the content not being described in detail in specification is known to the skilled person.

Claims (10)

1. the sulfur hexafluoride leakage detection method based on DIAL, it is characterised in that comprise the following steps：
(1) according to SF6Gas sorbing characteristics spectrum, choose SF6The corresponding wavelength value λ of peak-peak in gas absorption spectrum lineonWith SF6It is close to wavelength value λ corresponding to the absorption low ebb of peak-peak in gas absorption spectrum lineoff；
(2) it is λ that laser radar transmitter module circulates launch wavelength to GIS successivelyonAnd λoffLaser pulse beam；
(3) laser radar receiving module receive by GIS be transmitted back to Lai reflected laser pulse, and reflected laser pulse is converted into Digital electric signal；
(4) digital electric signal after message processing module processing conversion, calculates SF in GIS6Gas concentration value and leakage point position letter Breath.
2. the sulfur hexafluoride leakage detection method according to claim 1 based on DIAL, its feature exist In, in addition to step (5), the SF being calculated is shown on the electronic curtain of display and warning module6Gas concentration value and let out Leak source positional information, as the SF of leakage6When gas concentration value exceedes given threshold, the indicator lamp flicker of display and warning module, Buzzer sends the sound, reaches alarm purpose.
3. the sulfur hexafluoride leakage detection method according to claim 1 or 2 based on DIAL, its feature It is, in the step (1), SF6The corresponding wavelength value λ of peak-peak in gas absorption spectrum lineon10.551 μm are chosen for, SF6 It is close to wavelength value λ corresponding to the absorption low ebb of peak-peak in gas absorption spectrum lineoffIt is chosen for 10.696 μm.
4. the sulfur hexafluoride leakage detection method according to claim 1 or 2 based on DIAL, its feature It is, in the step (4), the digital electric signal after message processing module processing conversion, calculates SF in GIS6Gas concentration value And leakage dot position information, it is specially：
Changed, obtained and λ by message processing moduleonAnd λoffReceived signal power P corresponding to respectivelyr(λon) and Pr(λoff)； By SF6Gas is in λonAnd λoffThe calculation formula of absorption coefficient and concentration the light path product at place, calculates SF in GIS6Gas concentration light The value CL of journey product, then the value CL and laser to GIS distance R that are accumulated by concentration light path can calculate SF6Gas concentration value； By constantly launching laser to different angle, SF under different angle is drawn6The concentration value of gas, concentration value is bigger, closer to letting out Leak source, leakage point position can determine whether according to the difference of concentration value.
5. the sulfur hexafluoride leakage detection method according to claim 4 based on DIAL, its feature exist In being changed by message processing module, obtain received signal power P corresponding with respective wavelength valuer, circular is such as Under：
Received signal power
Wherein, PtRepresent laser transmission power, TaAtmospheric transmittance is represented, ρ represents target reflectivity, DrRepresent laser Receiving aperture (diameter), ηtRepresent the transmitance of laser radar transmitter module, ηrRepresent the transmitance of laser radar receiving module, R Represent the distance from laser to GIS；
SF in GIS6The value CL computational methods of gas concentration light path product are：
Concentration light path accumulates
Wherein, αonRepresent SF6The absorption coefficient of the strong absorbing wavelength of gas, αoffRepresent SF6The absorption coefficient of gas weak absorbing wavelength, Pr(λoff) represent λoffReceived signal power, Pr(λon) represent λonReceived signal power；
SF in GIS6Gas concentration value C computational methods are：
Concentration value
Wherein, CL represents SF6The value of gas concentration light path product, R represent the distance from laser to GIS.
6. implementing the sulfur hexafluoride leakage detection method based on DIAL as described in claim any one of 1-5 Device, it is characterised in that including power module, laser radar transmitter module, laser radar receiving module, message processing module；
The power module is used to power to laser radar transmitter module, laser radar receiving module, message processing module；
The laser radar transmitter module is used for repeat its transmission n times laser per second, and N >=2, it is λ that transmitting, which includes absorption peak wavelength,on =10.551 μm are λ with absorption valley wavelengthoff=10.696 μm of laser；
The laser radar receiving module is connected with message processing module；Laser radar receiving module is used to receive to be passed by GIS The reflected laser pulse returned, the optical signal received is converted into electric signal, and is sent to message processing module and is handled；
Described information processing module is handled the electric signal after conversion, calculates SF in GIS6Gas leaks concentration value and leakage Dot position information.
7. implement the device of the sulfur hexafluoride leakage detection method based on DIAL as claimed in claim 6, its It is characterised by, the times N value of laser radar transmitter module repeat its transmission laser per second is 20.
8. implement the device of the sulfur hexafluoride leakage detection method based on DIAL as claimed in claim 5, its It is characterised by, in addition to display and warning module, described information processing module are connected with display and warning module；Power module with Display and warning module connection, powered by power module to display and warning module；
The display and warning module include electronic curtain, indicator lamp and buzzer；By display and warning module, it will calculate and divide Analyse the SF drawn6Gas leaks concentration value and leakage dot position information is shown on electronic curtain；It is and advance according to detection demand SF is set6Gas leaks concentration threshold, works as SF6When gas leakage concentration value exceedes threshold value, indicator lamp flicker, buzzer sends sound Ring.
9. implement the dress of the sulfur hexafluoride leakage detection method based on DIAL as described in claim 6 or 7 or 8 Put, it is characterised in that laser radar transmitter module includes emission control module, laser tuning control module, laser；
Emission control module is connected with laser tuning control module, and the emission control module is waken up according to demand and correlation Parameter configuration, laser tuning control module is set to carry out the preparation of the laser pulse beam of transmitting respective wavelength；
The laser tuning control module is connected with laser；It is λ that laser tuning, which is controlled for modulating generation corresponding wavelength,onWith λoffLaser pulse beam；
The laser is used for the laser pulse beam tuned to GIS transmittings by laser tuning control module.
10. implementing the sulfur hexafluoride leakage detection method based on DIAL as described in claim 6 or 7 or 8 Device, it is characterised in that laser radar receiving module includes reception antenna, photoelectric conversion module and pre-amplifier module；
The reception antenna is connected with photoelectric conversion module, and reception antenna is used to receive the laser pulse reflected by GIS；
The photoelectric conversion module is connected with pre-amplifier module, and photoelectric conversion module is used to convert optical signals to telecommunications Number；
The pre-amplifier module is used to amplify ultra-weak electronic signal.
CN201710661242.9A 2017-08-04 2017-08-04 Sulfur hexafluoride leakage detection method and device based on DIAL Pending CN107356934A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107966712A (en) * 2017-11-20 2018-04-27 北京空间机电研究所 A kind of earth observation laser radar for the detection of trace gas column concentration
CN107966712B (en) * 2017-11-20 2019-11-12 北京空间机电研究所 A kind of earth observation laser radar for the detection of trace gas column concentration

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Application publication date: 20171117