CN104315348A - Multiple-reflection optical path-based natural gas pipeline leakage vehicle-mounted detection equipment - Google Patents
Multiple-reflection optical path-based natural gas pipeline leakage vehicle-mounted detection equipment Download PDFInfo
- Publication number
- CN104315348A CN104315348A CN201410541852.1A CN201410541852A CN104315348A CN 104315348 A CN104315348 A CN 104315348A CN 201410541852 A CN201410541852 A CN 201410541852A CN 104315348 A CN104315348 A CN 104315348A
- Authority
- CN
- China
- Prior art keywords
- vehicle
- gas
- laser
- signal
- pool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses multiple-reflection optical path-based natural gas pipeline leakage vehicle-mounted detection equipment which is vehicle-mounted equipment combined with a multiple-reflection opened gas pool for detection of leakage of an urban natural gas pipeline. The system has the advantages of no interference of vapor and other gas components during measuring, high measuring sensitivity (up to 1-2ppm) and high antijamming capacity. A vehicle-mounted system can be enabled to fast and accurately detect a natural gas leakage point and leakage intensity along a road. The equipment comprises a TDLAS (tunable diode laser absorption spectroscopy) laser driving part, a signal detection part, a signal processing part and the like and comprises the opened multiple-reflection gas pool, a GPS (global positioning system), a vehicle-mounted computer and the like. The equipment uses the TDLAS technology, a multiple-reflection pool technology and a GPS technology, and realizes the function of fast and accurate detection on leakage of the natural gas pipeline in a vehicle-mounted way.
Description
Technical field
The present invention relates to natural gas leaking detection facility field, specifically the vehicle-mounted detection facility of a kind of gas pipeline leakage based on multiple reflections light path.
Background technique
Along with the fast development of China's economy, the demand of the energy is also in quick increase, and the vertical Trunk-line wearing north and south of passing through from east to west is implemented in full, and the ratio of rock gas shared by China's energy resource structure strengthens just gradually.City gas system is the important infrastructure of modern city " lifeline " and urban construction, one of the outstanding feature of natural gas supply channelization urban modernization especially.Rock gas is a kind of gas of non-toxic, colorless and odorless, and its main component is methane (about more than 95%), simultaneously containing a small amount of alkane such as ethane, propane, butane.The explosion limit of rock gas is 5% ~ 15%, belongs to Class A Hazardous Chemical Substances, slightly leaks, be easy to be mixed to form explosive mixed gas with air, and running into burning things which may cause a fire disaster just may breaking out of fire explosive accident.But in the transmitting procedure of rock gas, natural gas line leakage phenomena is serious, the amount of natural gas of leakage generally will account for about 10% of gas transmission total amount, not only cause great economic loss, and also causing repeatedly serious explosive accident in recent years, the life safety of the people in serious threat, therefore must detect in time to find the leakage of natural gas line natural gas line.Natural gas line Leak testtion is an arduous process, the accident caused because of urban duct net leakage in recent years happens occasionally, existing detecting technology are difficult to the demand meeting growing Developing Natural Gas Industry, vehicle carried type gas pipeline leakage detecting technology can carry out Leak testtion along urban road to natural gas line with the speed of 40km/h, have great social effect to raising pipeline leakage testing efficiency, minimizing accident.
In air, the content of methane gas is at 1 to 2ppm, and may be that is just the leakage having occurred rock gas when detecting that in air, methane content reaches 4ppm, this just requires that the sensitivity of CH_4 detection equipment reaches ppm magnitude.The detecting method of current gas pipeline leakage has a variety of, as flame ionization detection, the methods such as ultrasonic tesint, electrochemical sensor, non-dispersive infrared absorption, only have flame ionization detection, non-dispersive infrared absorption can be used for vehicle-mounted gas probing in these methods.But flame ionization detection needs to use hydrogen as gas carrier to be measured, use very inconvenient, and hydrogen is also a kind of inflammable and explosive gas, carries a large amount of hydrogen and also can bring certain danger, the detection speed of the detection of flame ionization is simultaneously fuller, and vehicle-mounted efficiency is not high.During non-dispersive infrared absorption probe gas concentration, be subject to the impact of the field condition such as aqueous vapor, dust, cause erroneous judgement.
Tunable diode laser absorption spectroscopy (tunable diode laser absorption spectroscopy, TDLAS) technology is a kind of Trace gas detection technology fast-developing in recent years, TDLAS system utilizes laser diode to have very high spectral resolution and tunability, can measure specific molecular within the scope of special spectrum the spectral absorption turning line of shaking, thus the interference range of testing molecule and background can be separated, the interference of gas gas to gas concentration to be measured can be eliminated completely, utilize the character that semiconductor laser responds fast simultaneously, in conjunction with harmonic modulation technology, TDLAS technology can be enable to measure the concentration of trace gas.Therefore, the vehicle-mounted gas detection technique based on TDLAS technology has a wide range of applications at gas pipeline leakage detection field.
summary of the inventionthe object of this invention is to provide the vehicle-mounted detection facility of a kind of gas pipeline leakage based on multiple reflections light path, to solve prior art Problems existing.
In order to achieve the above object, the technical solution adopted in the present invention is:
The vehicle-mounted detection facility of gas pipeline leakage based on multiple reflections light path, it is characterized in that: include multiple reflecting pool and TDLAS system, described multiple reflecting pool and TDLAS system are jointly made into the form of bumper and replace nerf bar and be arranged on automotive front, wherein multiple reflecting pool is arranged on neutral position, TDLAS Operation system setting at one end, TDLAS system provides laser, laser enters in multiple reflecting pool with after gas effect to be measured and is back to TDLAS system, obtains concentration of methane gas by TDLAS system according to inverse signal process.
The vehicle-mounted detection facility of the described gas pipeline leakage based on multiple reflections light path, it is characterized in that: described multiple reflecting pool is based on White cell reflection tank principle, or Herriott cell reflection tank principle, or Cavity ring-down cell reflection tank principle design, multiple reflecting pool comprises a pair respectively by stent support and symmetrically arranged reflecting optics, forms gas Open architecture by two reflecting optics.
The vehicle-mounted detection facility of the described gas pipeline leakage based on multiple reflections light path, is characterized in that: described TDLAS system comprises semiconductor DFB, collimation lens, focusing lens, photodetector, pre-amplification circuit, lock-in amplifier, the A/D change-over circuit that operation wavelength is 1.653um;
Described Distributed Feedback Laser is controlled by laser high-precision temperature control system, control to be placed in 1.653um place by stable for Distributed Feedback Laser emission center wavelength by laser high-precision temperature control system, the current drive signal simultaneously superposed with 64KHz modulation signal by 80Hz sweep signal drives Distributed Feedback Laser Emission Lasers, the laser that Distributed Feedback Laser is launched is incident to multiple reflecting pool after collimation lens collimation, laser in multiple reflecting pool multiple reflections and with the gas effect to be measured entered in multiple reflecting pool after from multiple reflecting pool outgoing to focusing lens, assemble to photodetector through focusing lens, optical signal is converted to analog electric signal by photodetector, analog electric signal amplifies through pre-amplification circuit successively, after lock-in amplifier process, be converted to digital signal by A/D change-over circuit again and send into vehicle-mounted computer, vehicle-mounted computer carries out process to the digital signal sent into and obtains gas concentration information to be measured, the gas concentration of methane is obtained after again retrieving concentration being carried out to gas concentration information to be measured.
The vehicle-mounted detection facility of the described gas pipeline leakage based on multiple reflections light path, is characterized in that: described lock-in amplifier adopts two frequency-doubled signal 128KHz sinusoidal wave as with reference to signal, processes the analog electric signal after pre-amplification circuit amplifies.
The vehicle-mounted detection facility of the described gas pipeline leakage based on multiple reflections light path, is characterized in that: described vehicle-mounted computer is connected with vehicle GPS global position system.
Present invention incorporates the open reflection tank structure of tunable diode laser absorption spectroscopy method, achieve the high-acruracy survey of concentration of methane gas.In conjunction with GPS and vehicle-mounted computer, the distribution map of the gas pipeline leakage point along urban road can be drawn out fast.
The present invention utilizes methane gas in the characteristic absorption near infrared spectrum district, use a near infrared band DFB semiconductor laser to carry out methane concentration measurement, have employed the high-sensitivity detection that harmonic modulation technology and open multiple reflecting pool achieve concentration of methane gas simultaneously.Complete equipment is installed on the position of automotive front bumper, distance 20-30cm place, ground, detection architecture by data line transfer on the vehicle-mounted computer of automotive interior, and gas pipeline leakage point position is placed with on city map fast in conjunction with gps satellite locating function, convenient for maintaining personnel fix a point to construct.
Accompanying drawing explanation
Fig. 1 is the overall front view of present device.
Fig. 2 is present device unitary side view.
Fig. 3 is present device structure principle chart.
Fig. 4 is operational flow diagram of the present invention.
Embodiment
As shown in Figure 1 and Figure 2, the vehicle-mounted detection facility of gas pipeline leakage based on multiple reflections light path, include multiple reflecting pool 1 and TDLAS system 2, multiple reflecting pool 1 and TDLAS system 2 are jointly made into the form of bumper and replace nerf bar to be arranged on automobile 3 anterior, wherein multiple reflecting pool 1 is arranged on neutral position, TDLAS system 2 is arranged on one end, TDLAS system 2 provides laser, laser enters in multiple reflecting pool 1 with after gas effect to be measured and is back to TDLAS system 2, obtains concentration of methane gas by TDLAS system 2 according to inverse signal process.
As shown in Figure 3.Multiple reflecting pool is based on White cell reflection tank principle, or Herriott cell reflection tank principle, or Cavity ring-down cell reflection tank principle design, multiple reflecting pool comprises a pair respectively by stent support and symmetrically arranged reflecting optics, forms gas Open architecture by two reflecting optics.
TDLAS system comprises semiconductor DFB, collimation lens, focusing lens, photodetector, pre-amplification circuit, lock-in amplifier, the A/D change-over circuit that operation wavelength is 1.653um;
Distributed Feedback Laser is controlled by laser high-precision temperature control system, control to be placed in 1.653um place by stable for Distributed Feedback Laser emission center wavelength by laser high-precision temperature control system, the current drive signal simultaneously superposed with 64KHz modulation signal by 80Hz sweep signal drives Distributed Feedback Laser Emission Lasers, the laser that Distributed Feedback Laser is launched is incident to multiple reflecting pool after collimation lens collimation, laser in multiple reflecting pool multiple reflections and with the gas effect to be measured entered in multiple reflecting pool after from multiple reflecting pool outgoing to focusing lens, assemble to photodetector through focusing lens, optical signal is converted to analog electric signal by photodetector, analog electric signal amplifies through pre-amplification circuit successively, after lock-in amplifier process, be converted to digital signal by A/D change-over circuit again and send into vehicle-mounted computer 4, vehicle-mounted computer 4 carries out process to the digital signal sent into and obtains gas concentration information to be measured, the gas concentration of methane is obtained after again retrieving concentration being carried out to gas concentration information to be measured.
Lock-in amplifier adopts two frequency-doubled signal 128KHz sinusoidal wave as with reference to signal, processes the analog electric signal after pre-amplification circuit amplifies.
Vehicle-mounted computer 4 is connected with vehicle GPS global position system 5.
The present invention utilizes methane gas to carry out gas concentration detection near infrared characteristic absorption peak, methane gas has two absorption bands near infrared---1.6um and 3.3um, but consider that 3.3um wave band does not have ripe semiconductor light source at present, so the present invention selects 1.653um as the operation wavelength measuring methane concentration.But 1.653um wavelength place, the Absorption Line of methane is by force 1.313E
-21cm
-1/ (molecule.cm
-2), lower than 3.3um place absorption intensity.In order to reach the methane concentration detection sensitivity of ppm magnitude, the present invention needs in conjunction with multiple reflecting pool, makes effectively to measure light path and is greater than 10 meters.
The present invention is by accurate temperature control system, make the output wavelength locking of semiconductor laser and the central position of methane adsorption peak 1.653um, then by superposition 80Hz low-frequency sweep signal and 64KHz high-frequency modulation signal, current drives is carried out to laser, signal after GAS ABSORPTION is detected circuit detection and by after lock-in amplifier demodulation, obtains gas concentration information.The gas concentration of methane is obtained through retrieving concentration.
Multiple reflecting pool can adopt White cell or Herriott cell or Cavity ring-down cell.Utilize laser beam multiple reflections between two-face mirror that two panels or multi-disc reflector make through collimation, increase and the light path of gas effect.The multiple reflecting pool of the present invention's design has dispensed the structure of air chamber wall, and air chamber is open is placed in air, makes methane gas can enter air chamber freely under the movement of automobile.
The shape that TDLAS system and multiple reflecting pool are made into car bumper by mechanical structure replaces bumper to be installed on front part of saloon car position, if there is natural gas leaking near when car advances, the gas leaked can flow through open multiple reflecting pool, is detected concentration information by detector.Testing result is sent on vehicle-mounted computer by datawire, is attached on city map in conjunction with GPS navigation system by leakage point position information, completes natural gas leaking fast and accurately and detects.
The present invention be a kind of vehicle-mounted, based on a kind of natural gas leaking detection technique in conjunction with multiple reflecting pool of TDLAS technology.Its overall structure as shown in Figure 1, 2.TDLAS system and multiple reflecting pool are the pattern of similar bumper by Design of Mechanical Structure, and alternative bumper is installed on the high position of automotive front distance ground 20-30cm.When automobile advances along road, if there is natural gas leaking point, the rock gas of leakage will enter open multiple reflecting pool, and working laser repeatedly through being detected gas, will obtain gas concentration.Gas concentration information is through data line transfer on vehicle-mounted computer, and vehicle-mounted computer connects gps satellite navigation system simultaneously, and when detecting concentration of natural gas and being greater than specified value, vehicle-mounted computer will record the position coordinate of GPS automatically, automatically draws leakage point map.
As shown in Figure 3, be the concrete structure schematic diagram of natural gas leaking detection facility in the present invention.The Distributed Feedback Laser of 1.653um wavelength is controlled by laser high-precision temperature control system, and stable for laser emission center wavelength is placed in 1.653um place, and the current drive signal then superposed with 64KHz modulation signal via 80Hz sweep signal drives Emission Lasers.Laser enters multiple reflecting pool after collimated, and multiple reflecting pool can adopt the various structures of White cell or Herriott cell or Cavity ring-down cell, and pool wall structure is removed in multiple reflecting pool design, becomes a kind of reflection tank of opening.In multiple reflecting pool, the laser of multiple reflections converges on photodetector after lens focus, lock-in amplifier is amplified into through pre-amplification circuit, lock-in amplifier adopts two frequency-doubled signal 128KHz sine waves to be reference signal, the signal of photodetection is processed, and through A/D conversion, send into after vehicle-mounted computer data processing through datawire and obtain gas concentration information to be measured.
As shown in Figure 4, be the flow chart that complete machine runs.First for the natural gas leaking detection facility in left side in figure, after device start, laser launches laser work under the driving of laser driver module, laser light gas to be measured carries out the measurement of gas concentration information, and measurement result obtains the concentration results of gas to be measured through signal transacting.In figure, right survey part is vehicle GPS global position system, and its function is the absolute coordinates point constantly obtaining car position.Signal is carried out between the two synchronous by vehicle-mounted computer---when vehicle-mounted computer is greater than setting concentration from the gas concentration that natural gas leaking detection facility obtains, regards as current location and there is natural gas leaking.Now, vehicle-mounted computer obtains the absolute coordinates of current location from GPS, and gas concentration value is installed absolute coordinate drafting with on the city map of vehicle-mounted computer inside.Finally this leakage point map is wirelessly sent to unit, and the fixed point of carrying out natural gas line according to this leakage point map by attendant is keeped in repair.Achieve gas pipeline leakage quick, accurate, automatically detect.
Claims (5)
1. based on the vehicle-mounted detection facility of gas pipeline leakage of multiple reflections light path, it is characterized in that: include multiple reflecting pool and TDLAS system, described multiple reflecting pool and TDLAS system are jointly made into the form of bumper and replace nerf bar and be arranged on automotive front, wherein multiple reflecting pool is arranged on neutral position, TDLAS Operation system setting at one end, TDLAS system provides laser, laser enters in multiple reflecting pool with after gas effect to be measured and is back to TDLAS system, obtains concentration of methane gas by TDLAS system according to inverse signal process.
2. the vehicle-mounted detection facility of the gas pipeline leakage based on multiple reflections light path according to claim 1, it is characterized in that: described multiple reflecting pool is based on White cell reflection tank principle, or Herriott cell reflection tank principle, or Cavity ring-down cell reflection tank principle design, multiple reflecting pool comprises a pair respectively by stent support and symmetrically arranged reflecting optics, forms gas Open architecture by two reflecting optics.
3. the vehicle-mounted detection facility of the gas pipeline leakage based on multiple reflections light path according to claim 1, is characterized in that: described TDLAS system comprises semiconductor DFB, collimation lens, focusing lens, photodetector, pre-amplification circuit, lock-in amplifier, the A/D change-over circuit that operation wavelength is 1.653um;
Described Distributed Feedback Laser is controlled by laser high-precision temperature control system, control to be placed in 1.653um place by stable for Distributed Feedback Laser emission center wavelength by laser high-precision temperature control system, the current drive signal simultaneously superposed with 64KHz modulation signal by 80Hz sweep signal drives Distributed Feedback Laser Emission Lasers, the laser that Distributed Feedback Laser is launched is incident to multiple reflecting pool after collimation lens collimation, laser in multiple reflecting pool multiple reflections and with the gas effect to be measured entered in multiple reflecting pool after from multiple reflecting pool outgoing to focusing lens, assemble to photodetector through focusing lens, optical signal is converted to analog electric signal by photodetector, analog electric signal amplifies through pre-amplification circuit successively, after lock-in amplifier process, be converted to digital signal by A/D change-over circuit again and send into vehicle-mounted computer, vehicle-mounted computer carries out process to the digital signal sent into and obtains gas concentration information to be measured, the gas concentration of methane is obtained after again retrieving concentration being carried out to gas concentration information to be measured.
4. the vehicle-mounted detection facility of the gas pipeline leakage based on multiple reflections light path according to claim 3, it is characterized in that: described lock-in amplifier adopts two frequency-doubled signal 128KHz sinusoidal wave as with reference to signal, processes the analog electric signal after pre-amplification circuit amplifies.
5. the vehicle-mounted detection facility of the gas pipeline leakage based on multiple reflections light path according to claim 3, is characterized in that: described vehicle-mounted computer is connected with vehicle GPS global position system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410541852.1A CN104315348A (en) | 2014-10-14 | 2014-10-14 | Multiple-reflection optical path-based natural gas pipeline leakage vehicle-mounted detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410541852.1A CN104315348A (en) | 2014-10-14 | 2014-10-14 | Multiple-reflection optical path-based natural gas pipeline leakage vehicle-mounted detection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104315348A true CN104315348A (en) | 2015-01-28 |
Family
ID=52370623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410541852.1A Pending CN104315348A (en) | 2014-10-14 | 2014-10-14 | Multiple-reflection optical path-based natural gas pipeline leakage vehicle-mounted detection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104315348A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805560A (en) * | 2016-03-04 | 2016-07-27 | 南昌航空大学 | Natural gas pipeline leak detection system based on unmanned aerial vehicle |
| CN107035972A (en) * | 2017-03-24 | 2017-08-11 | 北京华夏艾科激光科技有限公司 | A kind of gas pipe inspection car intelligent inspection system |
| US20170328522A1 (en) * | 2016-05-16 | 2017-11-16 | International Business Machines Corporation | Automated Gas Detection and Reporting System |
| CN108362664A (en) * | 2018-03-30 | 2018-08-03 | 华电智控（北京）技术有限公司 | Telemetering motor vehicle tail equipment and system |
| CN108572159A (en) * | 2018-05-18 | 2018-09-25 | 东北石油大学 | A kind of multielement hot fluid component CO2And H2O content laser reflection type detection device |
| CN109001154A (en) * | 2018-06-13 | 2018-12-14 | 贾良权 | The efficient measuring system of seed vitality based on laser absorption spectroscopy |
| CN109340581A (en) * | 2018-11-21 | 2019-02-15 | 郑州如阳科技有限公司 | A kind of lateral Blind Test scanning means of combustion gas buried pipeline leakage |
| CN109630907A (en) * | 2019-02-27 | 2019-04-16 | 北京航星网讯技术股份有限公司 | Vehicle-mounted laser CH_4 detection device |
| CN112902028A (en) * | 2019-12-03 | 2021-06-04 | 中国石油天然气股份有限公司 | Leak detection system |
| CN115468122A (en) * | 2022-09-15 | 2022-12-13 | 华润燃气投资（中国）有限公司 | Natural gas station operation intelligent monitoring system and method based on 5G |
| JP7421485B2 (en) | 2017-10-18 | 2024-01-24 | ガスポロックス エイビー | System and method for determining container health by optical measurement |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308089A (en) * | 2008-04-30 | 2008-11-19 | 宁波工程学院 | Ethyne gas optical checking method and apparatus |
| CN202075221U (en) * | 2011-05-24 | 2011-12-14 | 河南汉威电子股份有限公司 | Vehicular methane leakage monitoring device |
| CN102478510A (en) * | 2010-11-24 | 2012-05-30 | 上海复莱信息技术有限公司 | Spectrum-type sensor for methane detection |
| CN102662175A (en) * | 2012-05-04 | 2012-09-12 | 山东华辰泰尔信息科技股份有限公司 | Laser radar device for measuring mine gas concentration distribution and working method thereof |
| US8415626B1 (en) * | 2010-08-25 | 2013-04-09 | Airware, Inc. | Intrinsically safe NDIR gas sensor in a can |
| CN203534951U (en) * | 2013-09-09 | 2014-04-09 | 中国电子科技集团公司第八研究所 | Single optical fiber transmission gas multiple-reflection tank detection device |
-
2014
- 2014-10-14 CN CN201410541852.1A patent/CN104315348A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308089A (en) * | 2008-04-30 | 2008-11-19 | 宁波工程学院 | Ethyne gas optical checking method and apparatus |
| US8415626B1 (en) * | 2010-08-25 | 2013-04-09 | Airware, Inc. | Intrinsically safe NDIR gas sensor in a can |
| CN102478510A (en) * | 2010-11-24 | 2012-05-30 | 上海复莱信息技术有限公司 | Spectrum-type sensor for methane detection |
| CN202075221U (en) * | 2011-05-24 | 2011-12-14 | 河南汉威电子股份有限公司 | Vehicular methane leakage monitoring device |
| CN102662175A (en) * | 2012-05-04 | 2012-09-12 | 山东华辰泰尔信息科技股份有限公司 | Laser radar device for measuring mine gas concentration distribution and working method thereof |
| CN203534951U (en) * | 2013-09-09 | 2014-04-09 | 中国电子科技集团公司第八研究所 | Single optical fiber transmission gas multiple-reflection tank detection device |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805560B (en) * | 2016-03-04 | 2017-10-10 | 南昌航空大学 | A kind of gas pipeline leakage detecting system based on unmanned plane |
| CN105805560A (en) * | 2016-03-04 | 2016-07-27 | 南昌航空大学 | Natural gas pipeline leak detection system based on unmanned aerial vehicle |
| US20170328522A1 (en) * | 2016-05-16 | 2017-11-16 | International Business Machines Corporation | Automated Gas Detection and Reporting System |
| US10060578B2 (en) * | 2016-05-16 | 2018-08-28 | International Business Machines Corporation | Automated gas detection and reporting system |
| CN107035972B (en) * | 2017-03-24 | 2019-04-23 | 北京华夏艾科激光科技有限公司 | A kind of automobile-used intelligent inspection system of gas pipe inspection |
| CN107035972A (en) * | 2017-03-24 | 2017-08-11 | 北京华夏艾科激光科技有限公司 | A kind of gas pipe inspection car intelligent inspection system |
| JP7421485B2 (en) | 2017-10-18 | 2024-01-24 | ガスポロックス エイビー | System and method for determining container health by optical measurement |
| CN108362664A (en) * | 2018-03-30 | 2018-08-03 | 华电智控（北京）技术有限公司 | Telemetering motor vehicle tail equipment and system |
| CN108572159A (en) * | 2018-05-18 | 2018-09-25 | 东北石油大学 | A kind of multielement hot fluid component CO2And H2O content laser reflection type detection device |
| CN109001154A (en) * | 2018-06-13 | 2018-12-14 | 贾良权 | The efficient measuring system of seed vitality based on laser absorption spectroscopy |
| CN109340581A (en) * | 2018-11-21 | 2019-02-15 | 郑州如阳科技有限公司 | A kind of lateral Blind Test scanning means of combustion gas buried pipeline leakage |
| CN109340581B (en) * | 2018-11-21 | 2024-04-09 | 郑州如阳科技有限公司 | Transverse blind test scanning device for gas buried pipeline leakage |
| CN109630907B (en) * | 2019-02-27 | 2020-05-22 | 北京航星网讯技术股份有限公司 | Vehicle-mounted laser methane detection device |
| CN109630907A (en) * | 2019-02-27 | 2019-04-16 | 北京航星网讯技术股份有限公司 | Vehicle-mounted laser CH_4 detection device |
| CN112902028A (en) * | 2019-12-03 | 2021-06-04 | 中国石油天然气股份有限公司 | Leak detection system |
| CN112902028B (en) * | 2019-12-03 | 2022-05-10 | 中国石油天然气股份有限公司 | Leak detection system |
| CN115468122A (en) * | 2022-09-15 | 2022-12-13 | 华润燃气投资（中国）有限公司 | Natural gas station operation intelligent monitoring system and method based on 5G |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104315348A (en) | Multiple-reflection optical path-based natural gas pipeline leakage vehicle-mounted detection equipment | |
| CN101696897B (en) | Mobile single-frequency differential natural gas pipeline leakage laser remote sensing detection system and single-frequency differential natural gas pipeline leakage laser remote sensing detection method | |
| Wainner et al. | Handheld, battery-powered near-IR TDL sensor for stand-off detection of gas and vapor plumes | |
| CN207850919U (en) | A kind of vehicle-mounted natural gas leaking detection device | |
| CN205982064U (en) | Hand -held type methane laser telemetry and spot measurement device | |
| US10473818B2 (en) | Hub and spoke system for detecting and locating gas leaks | |
| CN102662175A (en) | Laser radar device for measuring mine gas concentration distribution and working method thereof | |
| CN101178153A (en) | Locating method and system for city gas pipeline leakage test | |
| CN104237898A (en) | Natural gas leakage telemetering laser radar | |
| CN103884477A (en) | Handheld type laser methane gas baffle board leakage detecting device | |
| CN101694265A (en) | Real-time concentration calibration method of leakage detecting laser radar for on-board natural gas pipeline | |
| CN102798850A (en) | Rayleigh-Doppler laser radar ground calibration system | |
| CN105675532A (en) | Optical system of intermediate infrared laser radar | |
| CN201152458Y (en) | Urban gas pipeline leakage detection and positioning system | |
| Li et al. | Simultaneous standoff sensing for methane and hydrogen sulfide using wavelength-modulated laser absorption spectroscopy with non-cooperative target | |
| CN207730930U (en) | The laser radar system that navigates is walked in a kind of measurable ozone concentration distribution | |
| CN203971261U (en) | For the fire prevention and control system of mine and underground pipe network | |
| CN105021568A (en) | Methane gas concentration detection device based on multi-mode laser spectrum technology | |
| Frish et al. | Standoff gas leak detectors based on tunable diode laser absorption spectroscopy | |
| CN107064058B (en) | Shale gas leakage multiple gas online monitoring device and method | |
| Mo et al. | Current-modulated cavity ring-down spectroscopy for mobile monitoring of natural gas leaks | |
| CN205679525U (en) | Mid-infrared laser radar optics system | |
| CN202493901U (en) | Vehicle-mounted gas leak detector | |
| CN201051075Y (en) | Passive differential optical absorption spectrum analyzer | |
| CN203385658U (en) | Handheld gas sensing system based on optimal remote sensing lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150128 |