CN103954584A - Oil gas concentration detection device and method - Google Patents
Oil gas concentration detection device and method Download PDFInfo
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- CN103954584A CN103954584A CN201410203216.8A CN201410203216A CN103954584A CN 103954584 A CN103954584 A CN 103954584A CN 201410203216 A CN201410203216 A CN 201410203216A CN 103954584 A CN103954584 A CN 103954584A
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Abstract
The invention provides an oil gas concentration detection device and method. The detection device comprises a terahertz wave emitter, a reflecting mirror, a terahertz wave receiver and an analysis module, wherein the terahertz wave emitter is used for emitting terahertz waves; the reflecting mirror is used for reflecting terahertz waves penetrating through an oil gas sample; the terahertz wave receiver is used for receiving and processing the terahertz waves and acquiring and outputting oil gas concentration data; the analysis module is connected with the terahertz wave receiver and is used for displaying received oil gas concentration data in real time. According to the oil gas concentration detection device and method, the applicability of oil gas concentration detection is very high, the detection can be rapidly carried out in various environments, and the accuracy is high.
Description
Technical field
The present invention relates to oil and gas detection field, espespecially a kind of device and method that utilizes terahertz time-domain spectroscopic technology to detect gas concentration in large oil tank.
Background technology
Due to large-scale oil storage tank hermetically-sealed construction and tank skin space sealing difficulty, cause space between large oil tank once sealing and secondary seal often from the inflammable gas a large amount of, in the time that gas concentration is accumulated to a certain degree, often there is very large potential safety hazard.Especially under thunderstorm weather, large oil tank is easy to be struck by lightning, and causes large oil tank to be blasted and fire failure, causes serious property and economic loss.And for fear of the generation of accident, how lightning rod is installed in large oil tank region, and the hermetically-sealed construction of large oil tank is carried out to transformation and upgrade and optimization, and the moment is monitored the gas concentration in O-ring seal, improves the anti-lightning ability of large oil tank by increasing reliable thunder and lightning leakage path.And the most key be exactly the ability of monitoring gas concentration in O-ring seal, to take in advance associated safety emergency measure.But the accurate detection of gas concentration lacks a kind of strong detection method always.
The ultimate principle of terahertz time-domain spectroscopic technology is to utilize the THz wave electric field that femtosecond pulse produces and detection time is differentiated, obtain the spectral information of tested article by Fourier transform, this is a kind of novel detection and characterization technique, its significant advantage is that resolution is high, bandwidth, emittance is low, a kind of safe and reliable non-cpntact measurement means, be particularly useful for detection and application under particular surroundings, based on its above advantage, in conjunction with the actual testing environment of large oil tank, the invention provides a kind of method of utilizing terahertz time-domain spectroscopic technology to detect gas concentration in large oil tank.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of gas concentration pick-up unit and method are provided, this structure of the detecting device compact and reasonable, technological operation is simple and convenient, high to gas concentration accuracy of detection, device stability good, wide accommodation, safe and reliable.
For reaching appeal object, the invention provides a kind of gas concentration pick-up unit, it is characterized in that, described pick-up unit comprises: THz wave transmitter, catoptron, THz wave receiver and analysis module; Described THz wave transmitter, in order to launch THz wave; Described catoptron, in order to reflect through the THz wave of oil gas sample; Described THz wave receiver, in order to THz wave described in reception & disposal, obtains gas concentration data output; Described analysis module is connected with THz wave receiver, in order to the gas concentration data that receive are shown in real time.
In technique scheme, described analysis module is also connected with a warning device; Described warning device is for described gas concentration data are carried out to parameter analysis, if described gas concentration data, higher than pre-set threshold value, start and report to the police.
In technique scheme, described THz wave transmitter comprises laser instrument and transmitting probe, will on Ear Mucosa Treated by He Ne Laser Irradiation transmitting probe, produce THz wave by laser instrument.
In technique scheme, described transmitting probe is gallium arsenide, zinc telluridse crystal or Terahertz antenna.
In technique scheme, described laser instrument comprises fiber laser or solid state laser.
In technique scheme, between described solid state laser and transmitting probe, can be connected by stand for optical lens, fiber laser can directly be connected with transmitting probe by optical fiber.
The present invention also provides a kind of gas concentration pick-up unit, and described pick-up unit comprises: THz wave transmitter, transmission window, THz wave receiver and analysis module; Described THz wave transmitter, in order to launch THz wave to oil and gas detection region; Described transmission window is arranged at the oil and gas pipes wall position on described THz wave path, the THz wave in order to transmission through oil gas sample; Described THz wave receiver, in order to THz wave described in reception & disposal, obtains gas concentration data output; Described analysis module is connected with THz wave receiver, in order to the gas concentration data that receive are shown in real time.
The present invention also provides a kind of gas concentration detection method, and described detection method comprises: launch THz wave to oil and gas detection region by THz wave transmitter; Utilize catoptron to reflect through the THz wave of oil gas sample; THz wave described in reception & disposal, obtains gas concentration data output; The gas concentration data that receive are shown in real time.
In technique scheme, described the real-time demonstration of gas concentration data receiving is also comprised described gas concentration data are carried out to parameter analysis, if described gas concentration data, higher than pre-set threshold value, start and report to the police.
The present invention also provides a kind of gas concentration detection method, and described detection method comprises: launch THz wave to oil and gas detection region by THz wave transmitter; Utilize the THz wave of transmission window transmission through oil gas sample; THz wave described in reception & disposal, obtains gas concentration data output; The gas concentration data that receive are shown in real time.
Useful technique effect of the present invention is: not only use non-contacting measurement means to large oil tank once, the long term monitoring of secondary seal gas concentration, and from measuring principle, use THz wave to detect and more have superiority in measuring accuracy than existing detection method, can reach at present 5% measuring accuracy; Simultaneously non-contacting test format has very strong applicability, can under multiple environment, detect rapidly and accuracy higher.
Brief description of the drawings
Fig. 1 is that the present invention utilizes the apparatus structure schematic diagram of terahertz time-domain spectroscopic technology to the reflective detection of gas concentration in large oil tank.
Fig. 2 is the apparatus structure schematic diagram that the present invention utilizes terahertz time-domain spectroscopic technology to detect gas concentration transmission-type in large oil tank.
Fig. 3 is that the present invention utilizes the method schematic diagram of terahertz time-domain spectroscopic technology to the reflective detection of gas concentration in large oil tank.
Fig. 4 is the method schematic diagram that the present invention utilizes terahertz time-domain spectroscopic technology to detect gas concentration transmission-type in large oil tank.
Drawing reference numeral
10 THz wave transmitters
1 laser instrument
2 transmitting probes
3 catoptrons
301,302 transmission windows
4 THz wave receivers
5 analysis modules
6 warning devices
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Embodiment 1
A kind of gas concentration pick-up unit and the detection method schematic diagram that in the embodiment of the present invention, provide, wherein said pick-up unit comprises: THz wave transmitter 10, catoptron 3, THz wave receiver 4 and analysis module 5; Described THz wave transmitter 10, in order to launch THz wave; Described catoptron 3, in order to reflect through the THz wave of oil gas sample; Described THz wave receiver 4, in order to THz wave described in reception & disposal, obtains gas concentration data output; Described analysis module 5 is connected with THz wave receiver 4, in order to the gas concentration data that receive are shown in real time.
In the above-described embodiments, preferably also can comprise analysis module 5 and be connected with a warning device 6; Described warning device 6 is for described gas concentration data are carried out to parameter analysis, if described gas concentration data, higher than pre-set threshold value, start and report to the police.
In the above-described embodiments, wherein said THz wave transmitter 10 comprises laser instrument 1 and transmitting probe 2, please refer to Fig. 1, will on Ear Mucosa Treated by He Ne Laser Irradiation transmitting probe 2, produce THz wave by laser instrument 1.Specifically, described transmitting probe 2 is gallium arsenide, zinc telluridse crystal or Terahertz antenna, irradiates the transmitting probe 2 of gallium arsenide, zinc telluridse crystal or Terahertz antenna material by laser instrument 1, produces THz wave.
According to the gas concentration pick-up unit in above-described embodiment, the present invention also provides a kind of detection method, please refer to shown in Fig. 3, and described method comprises: S101 launches THz wave to oil and gas detection region by THz wave transmitter 10; S102 utilizes catoptron 3 to reflect through the THz wave of oil gas sample; THz wave described in S103 reception & disposal, obtains gas concentration data output; S104 shows the gas concentration data that receive in real time.
In the above-described embodiments, preferably also can comprise: S104 also can carry out parameter analysis by described gas concentration data by the real-time demonstration of gas concentration data receiving, if described gas concentration data, higher than pre-set threshold value, start and report to the police.
In above-described embodiment, parameter analysis refers to respective identification data in the gas concentration data that receive is extracted, above-mentioned identification data and the security value (s) setting in advance are compared, if higher than this security value (s), represent that this gas concentration is too high, in the hole, now start and report to the police.
In above-described embodiment, identification packet is containing hydrocarbon content ratio in container, the combination of the one or more data such as a certain gas content value in oil gas.
In above-described embodiment, security value (s), for setting in advance, can, according to detected oil gas composition, load the device equicorrelated case of this oil gas, formulates a relatively reasonable numerical value.
Please refer to shown in Fig. 1, is that the present invention utilizes the method schematic diagram of terahertz time-domain spectroscopic technology to the reflective detection of gas concentration in large oil tank.As shown in Figure 1, in the present embodiment, laser instrument 1 is fiber laser, forms THz wave transmitter 10 with transmitting probe 2, is connected between the two by optical fiber, its principle of work is, Ear Mucosa Treated by He Ne Laser Irradiation is at gallium arsenide, on zinc telluridse crystal or Terahertz antenna, produce THz wave, THz wave is radiated on the catoptron 3 being embedded on oil tank tube wall through surveyed area, by catoptron 3, THz wave is reflexed in THz wave receiver 4 again, after the THz wave spectrum that receiver receives, process and transfer to again analysis module 5 by phase-locked amplification and signal, on analysis module 5, carry out Real-Time Monitoring and the analysis of spectrum and inflammable gas concentration and composition, trigger alarm device 6 in the time that gas concentration reaches warning line, prompting gives the alarm, the oil gas of higher concentration so that release in time, avoid the generation of peril.
In above-described embodiment, analysis module 5 is analyzed through phase-locked amplification and signal THz wave after treatment and is specifically comprised: THz wave is through phase-locked amplification, inverse Fourier transform etc. are calculated and are obtained individual features mark peak, the THz wave spectrogram having in the signature identification peak of acquisition and analysis module 5 is made comparisons, obtain its corresponding gas concentration value.
Wherein in above-described embodiment, THz wave spectrogram can be by preserving the signature identification peak of known gas concentration and this gas concentration, concrete comprises: the gas concentration pick-up unit providing by the application utilizes terahertz time-domain spectroscopic technology to measure known gas concentration, in order to improve precision, the equal duplicate measurements of each sample three times, get its mean value as final sample signal, the THz wave time domain waveform of sample signal is carried out to computational transformation and obtain its absorption spectrogram, analyze every kind of sample THz wave time domain spectrogram and absorb spectrogram, obtain its signature identification peak.
Then, the gas concentration sample of different hydrocarbon contents is carried out to THz wave detection, by corresponding with gas concentration this testing result preservation, set up the corresponding gas concentration THz wave dactylogram database corresponding with THz wave special medical treatment mark peak.
Finally, the gas concentration sample of known gas concentration is carried out to THz wave detection, the accuracy of validation database, if inaccurate, further proofreaies and correct, and finally obtains accurate database.
Laser instrument 1 selective light fibre laser in the above-described embodiments, is due to the demand for convenient and flexible operating, and can be directly connected by optical fiber between THz wave generation device.For actual conditions, in practical operation, also likely replace with solid state laser.
THz wave producing method can be two kinds of implementations, and Ear Mucosa Treated by He Ne Laser Irradiation produces THz wave on gallium arsenide or zinc telluridse crystal, or Ear Mucosa Treated by He Ne Laser Irradiation produces THz wave on THz wave antenna.
By gas concentration pick-up unit provided by the invention and method, not only use non-contacting measurement means to large oil tank once, the long term monitoring of secondary seal gas concentration, and from measuring principle, use THz wave to detect and more have superiority in measuring accuracy than existing detection method, can reach at present 5% measuring accuracy; Simultaneously non-contacting test format has very strong applicability, can under multiple environment, detect rapidly and accuracy higher.
Embodiment 2
A kind of gas concentration pick-up unit, is characterized in that, described pick-up unit comprises: THz wave transmitter 10, transmission window 301,302, THz wave receiver 4 and analysis module 5; Described THz wave transmitter 10, in order to launch THz wave to oil and gas detection region; Described transmission window 301,302, the THz wave in order to transmission through oil gas sample; Described THz wave receiver 4, in order to THz wave described in reception & disposal, obtains gas concentration data output; Described analysis module 5 is connected with THz wave receiver 4, in order to the gas concentration data that receive are shown in real time.
In the above-described embodiments, described analysis module 5 is also connected with a warning device 6; Described warning device 6 is for described gas concentration data are carried out to parameter analysis, if described gas concentration data, higher than pre-set threshold value, start and report to the police.
In the above-described embodiments, described THz wave transmitter 10 comprises laser instrument 1 and transmitting probe 2, will on Ear Mucosa Treated by He Ne Laser Irradiation transmitting probe 2, produce THz wave by laser instrument 1.
In the above-described embodiments, described transmitting probe 2 is gallium arsenide, zinc telluridse crystal or Terahertz antenna.
According to the gas concentration pick-up unit in above-described embodiment, the present invention also provides a kind of detection method, please refer to shown in Fig. 4, and described method comprises: S201 launches THz wave to oil and gas detection region by THz wave transmitter 10; S202 utilizes the THz wave of transmission window 301,302 transmissions through oil gas sample; THz wave described in S203 reception & disposal, obtains gas concentration data output; S204 shows the gas concentration data that receive in real time.
In the above-described embodiments, preferably also can comprise: S204 the real-time demonstration of gas concentration data receiving is also comprised described gas concentration data are carried out to parameter analysis, if described gas concentration data, higher than pre-set threshold value, start and report to the police.
In above-described embodiment, parameter analysis refers to respective identification data in the gas concentration data that receive is extracted, above-mentioned identification data and the security value (s) setting in advance are compared, if higher than this security value (s), represent that this gas concentration is too high, in the hole, now start and report to the police.
In above-described embodiment, identification packet is containing hydrocarbon content ratio in container, the combination of the one or more data such as a certain gas content value in oil gas.
In above-described embodiment, security value (s), for setting in advance, can, according to detected oil gas composition, load the device equicorrelated case of this oil gas, formulates a relatively reasonable numerical value.
Please refer to shown in Fig. 2, is the method schematic diagram that the present invention utilizes terahertz time-domain spectroscopic technology to detect gas concentration transmission-type in large oil tank.As shown in Figure 2, in the present embodiment, LASER Light Source is sent Ear Mucosa Treated by He Ne Laser Irradiation in THz wave generation device, wherein the generation of THz wave can have two kinds of implementations, Ear Mucosa Treated by He Ne Laser Irradiation produces THz wave on gallium arsenide or zinc telluridse crystal, or Ear Mucosa Treated by He Ne Laser Irradiation produces THz wave on THz wave antenna, THz wave is by detection window penetration-detection interval, adopt the method for transmission-type to be radiated in the probe of THz wave receiver 4, the THz wave spectrum that receiver receives can carry out Real-Time Monitoring and the analysis of spectrum and inflammable gas concentration and composition again after phase-locked amplification and signal processing on analysis module 5, trigger alarm device 6 in the time that gas concentration reaches warning line, prompting gives the alarm, in order to the oil gas of the higher concentration of releasing in time, avoid the generation of peril.
Wherein in above-described embodiment, THz wave spectrogram can be by preserving the signature identification peak of known gas concentration and this gas concentration, concrete comprises: the gas concentration pick-up unit providing by the application utilizes terahertz time-domain spectroscopic technology to measure known gas concentration, in order to improve precision, the equal duplicate measurements of each sample three times, get its mean value as final sample signal, the THz wave time domain waveform of sample signal is carried out to computational transformation and obtain its absorption spectrogram, analyze every kind of sample THz wave time domain spectrogram and absorb spectrogram, obtain its signature identification peak.
Then, the gas concentration sample of different hydrocarbon contents is carried out to THz wave detection, by corresponding with gas concentration this testing result preservation, set up the corresponding gas concentration THz wave dactylogram database corresponding with THz wave special medical treatment mark peak.
Finally, the gas concentration sample of known gas concentration is carried out to THz wave detection, the accuracy of validation database, if inaccurate, further proofreaies and correct, and finally obtains accurate database.
THz wave transmission window 301,302 materials in the present embodiment have multiple choices, and quartz or new material all can be selected according to actual conditions.
The present invention utilizes the quantitative relationship existing between the decay of THz wave and gas concentration to implement the precise monitoring of gas concentration, be that gas concentration is higher, its decay to THz wave is larger, therefore in air there is relation one to one in the total concentration of inflammable gas and THz wave decay, and this is principle and the foundation of utilizing terahertz time-domain spectroscopic technology to detect gas concentration.In addition, due to the wideband of THz wave spectrum, different gas reveals the obvious difference on the frequency opposite sex to the absorber of THz wave, and this can clearly be reflected in THz wave absorption spectrum.And as from the foregoing, not only can measure the concrete concentration value of oil gas by terahertz time-domain spectroscopic technology, can also provide concrete composition contained in oil gas and content information thereof.
Method of the present invention is simple, and non-contacting test format has very strong applicability, can under multiple environment, detect rapidly and accuracy higher.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the art is to be understood that: method for making of the present invention is modified or is equal to replacement, and not departing from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (12)
1. a gas concentration pick-up unit, is characterized in that, described pick-up unit comprises: THz wave transmitter, catoptron, THz wave receiver and analysis module;
Described THz wave transmitter, in order to launch THz wave;
Described catoptron, in order to reflect through the THz wave of oil gas sample;
Described THz wave receiver, in order to THz wave described in reception & disposal, obtains gas concentration data output;
Described analysis module is connected with THz wave receiver, in order to the gas concentration data that receive are shown in real time.
2. gas concentration pick-up unit according to claim 1, is characterized in that, described analysis module is also connected with a warning device; Described warning device is for described gas concentration data are carried out to parameter analysis, if described gas concentration data, higher than pre-set threshold value, start and report to the police.
3. gas concentration pick-up unit according to claim 1, is characterized in that, described THz wave transmitter comprises laser instrument and transmitting probe, will on Ear Mucosa Treated by He Ne Laser Irradiation transmitting probe, produce THz wave by laser instrument.
4. gas concentration pick-up unit according to claim 3, is characterized in that, described transmitting probe is gallium arsenide, zinc telluridse crystal or Terahertz antenna.
5. a gas concentration pick-up unit, is characterized in that, described pick-up unit comprises: THz wave transmitter, transmission window, THz wave receiver and analysis module;
Described THz wave transmitter, in order to launch THz wave to oil and gas detection region;
Described transmission window, the THz wave in order to transmission through oil gas sample;
Described THz wave receiver, in order to THz wave described in reception & disposal, obtains gas concentration data output;
Described analysis module is connected with THz wave receiver, in order to the gas concentration data that receive are shown in real time.
6. gas concentration pick-up unit according to claim 5, is characterized in that, described analysis module is also connected with a warning device; Described warning device is for described gas concentration data are carried out to parameter analysis, if described gas concentration data, higher than pre-set threshold value, start and report to the police.
7. gas concentration pick-up unit according to claim 5, is characterized in that, described THz wave transmitter comprises laser instrument and transmitting probe, will on Ear Mucosa Treated by He Ne Laser Irradiation transmitting probe, produce THz wave by laser instrument.
8. gas concentration pick-up unit according to claim 7, is characterized in that, described transmitting probe is gallium arsenide, zinc telluridse crystal or Terahertz antenna.
9. a gas concentration detection method, is characterized in that, described method comprises:
Launch THz wave to oil and gas detection region by THz wave transmitter;
Utilize catoptron to reflect through the THz wave of oil gas sample;
THz wave described in reception & disposal, obtains gas concentration data output;
The gas concentration data that receive are shown in real time.
10. gas concentration detection method according to claim 9, it is characterized in that, described the real-time demonstration of gas concentration data receiving is also comprised described gas concentration data are carried out to parameter analysis, if described gas concentration data, higher than pre-set threshold value, start and report to the police.
11. 1 kinds of gas concentration detection methods, is characterized in that, described method comprises:
Launch THz wave to oil and gas detection region by THz wave transmitter;
Utilize the THz wave of transmission window transmission through oil gas sample;
THz wave described in reception & disposal, obtains gas concentration data output;
The gas concentration data that receive are shown in real time.
12. gas concentration detection methods according to claim 11, it is characterized in that, described the real-time demonstration of gas concentration data receiving is also comprised described gas concentration data are carried out to parameter analysis, if described gas concentration data, higher than pre-set threshold value, start and report to the police.
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| US10571393B2 (en) | 2018-04-13 | 2020-02-25 | Tsinghua University | Terahertz gas detection method and device based on Gregory double reflection antenna |
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Application publication date: 20140730 |