CN102661918A - Off-resonance photoacoustic spectrometric detection and analysis device - Google Patents
Off-resonance photoacoustic spectrometric detection and analysis device Download PDFInfo
- Publication number
- CN102661918A CN102661918A CN2012101694218A CN201210169421A CN102661918A CN 102661918 A CN102661918 A CN 102661918A CN 2012101694218 A CN2012101694218 A CN 2012101694218A CN 201210169421 A CN201210169421 A CN 201210169421A CN 102661918 A CN102661918 A CN 102661918A
- Authority
- CN
- China
- Prior art keywords
- module
- light
- resonance
- photoacoustic
- gas
- 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
Images
Abstract
An off-resonance photoacoustic spectrometric detection and analysis device consists of a photoacoustic spectrometric module (8). The photoacoustic spectrometric module (8) comprises a light source module (2-1), a photoacoustic signal generation module (2-2), an optical power measurement module (2-3) and a fault diagnostic analysis module (2-4). Optical signals generated by an infrared incoherence light source in the light source module (2-1) are focused by an ellipsoidal reflector to form a focused light beam, the focused light beam is modulated into light of specific frequency and wavelength by chopping blades of an optical chopper and optical filters and then transmitted to the photoacoustic signal generation module (2-2), and the fault diagnostic analysis module (2-4) calculates each gas concentration according to to-be-tested gas photoacoustic signals generated by irradiation, diagnoses faults and alarms. The off-resonance photoacoustic spectrometric detection and analysis device can be used for quantitative detection of gases such as SF6, CF4, SO2F2, SOF2, SO2, SF4 and H2O and is applicable to onsite online monitoring.
Description
Technical field
The present invention relates to a kind of SF
6Decomposition gas detects and the internal fault analysis diagnostic device.
Background technology
With sulfur hexafluoride gas (SF
6) be the electrical equipment of insulation and arc-extinguishing medium; Like GIS (gas-insulated switchgear; Gas-Insulated Switchgear), isolating switch, transformer, switch cubicle etc.; Develop rapidly with advantages such as its reliability are high, maintenance is little, floor area is little, and be widely used in the high pressure and the UHV (ultra-high voltage) field of electric system, become one of preferred unit of modern transformer station gradually.Yet, SF in recent years
6Gas insulated electric apparatus is in operation and some problems and accident have but occurred.According to ruuning situation and the fault statistics of decades, with SF
6In the electrical equipment for insulating gas, the ratio the highest (more than 60%) that insulation fault takes place.SF
6Be the forming gas of chemical property stabilizer pole at normal temperatures and pressures, its molecular structure is single sulphur polyfluoro symmetrical structure, has very strong electronegativity, and insulation and arc extinction performance are all very excellent.But work as SF
6Gas insulated electric apparatus discharge or overheating fault occur even when normally cut-offfing, SF
6Can resolve into low-fluorine sulfide, these low-fluorine sulfides can further react gas and the solid chemical compound that generates strong toxicity and severe corrosive with gaseous impurities, moisture, electrode and insulating material etc., and main decomposing gas thing has the thionyl of fluoridizing (SOF
2), fluoridize sulfonyl (SO
2F
2), carbon tetrafluoride (CF
4), ten fluoridize two sulphur (S
2F
10), sulphuric dioxide (SO
2) etc.The type of the kind of these decomposing gas things, content and fault, the order of severity etc. are quantitative relativity, and especially when electrical equipment generation latency fault, this moment, equipment still can move, but SF
6Decomposition has taken place in gas.Therefore, on-line monitoring SF
6The decomposing gas thing of gas insulated electric apparatus can give warning in advance to incipient fault, and diagnostic device fault and carry out fault isolation is rapidly and accurately avoided or the accident that delays takes place.
Patent CN2747583Y " testing agency of sulfur hexafluoride electrical equipment fault locator " connects pressure transducer, SO through a four-way connection
2Electrochemical gas sensor and H
2The S electrochemical gas sensor detects SO
2And H
2The content of S and to the device interior diagnosing malfunction.But this patent can only detect SO
2And H
2S gas can receive the restriction of structure when detecting the multiple gases component.
Patent CN101464671A " device and method of a kind of sulfur hexafluoride gas and analyte monitoring thereof " measures sulfur hexafluoride gas concentration through discharge current, and passes through SO
2, H
2S, O
2The electrochemical gas sensor measurement gas concentration of deriving.When gas concentration surpassed the predefined caution scope of system, device was reported to the police automatically and also ventilation blower fan, temperature-dropping fan etc. is carried out interlock control.Above-mentioned patent mainly is to detect SO through common electrochemical gas sensor
2, HF, H
2Decomposing gas things such as S are to important decomposed gas component SO
2F
2, SOF
2And CF
4Powerless Deng then.And there is the interference problem between gas composition in the electrochemical sensor method, poor selectivity not only, and exist and be prone to major defects such as drift, life-span be short zero point, be not suitable for SF
6The on-line monitoring of gas insulated electric apparatus.
Patent CN101644670A " infrared detecting device of sulfur hexafluoride gaseous discharge micro component and method " utilizes the method for Fourier infrared spectrum to the SF of GIS under shelf depreciation
6Decomposition gas detects.This device is simulated shelf depreciation through experimental transformer and is made SF on the shelf depreciation experimental provision
6Produce and decompose,, adopt infrared spectrometer to carry out the infrared spectrum absorption detecting then also feeding long light path gas cell in gas collecting to the containers such as gas pouch.Though this device can detect SO
2F
2, SOF
2, SO
2, HF, S
2F
10Etc. the multiple gases component, the fourier infrared method self has shortcomings such as accuracy of detection is poor, sensitivity is low, detection time is long, is suitable for the qualitative analysis in the laboratory, is inappropriate for SF
6The on-the-spot on-line monitoring of gas insulated electric apparatus.
Patent CN10151496A is " based on the SF of optoacoustic spectroscopy
6Detection system " some gas leakage sampling pipes are set near the isolating switch position, gather the SF that leaks
6In gas to the optoacoustic cavity, utilize CO then
2Laser instrument produce laser beam through the optoacoustic generator optical filter and incide the optoacoustic cavity, through detecting the outside SF of isolating switch
6Gas concentration is come on-line monitoring SF
6Gas leaks.The gas leakage sampling pipe that this patent is mentioned not with SF
6Isolating switch directly connects, and receives structural limitations can't detect SF
6The decomposition gas of inside electric appliance.And CO
2The laser wavelength range of laser instrument can not cover SF at 9 μ m ~ 11 μ m
6Whole wavelength coverages of decomposition gas, and discontinuous adjustable, also can cause the chiasma interference of absorption, therefore the restriction of examined means also can't detect and differentiate SF all sidedly
6Decomposition gas.
Patent CN101982759A " office puts down the infrared photoacoustic spectra pick-up unit and the method for sulfur hexafluoride decomposition components " adopts the method for infrared photoacoustic spectra; Light in the specific band incided in the resonance type photoacoustic cell produce photoacoustic signal, in order to detect SF under the shelf depreciation
6, CF
4, SO
2F
2, SOF
2, SO
2Concentration with HF gas.Yet because infrared incoherent light source is an area source, output power and radiation intensity are low; And light signal is dispersed greatly; Penetrate to the optical signal power of photoacoustic cell very low this moment, the photoacoustic signal intensity that causes producing very a little less than, be subject to the interference of ambient noise; Be difficult for isolating desired signal, its accuracy of detection is lower.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of quantitative, accurate, few maintenance or on-line monitoring sulfur hexafluoride (SF non-maintaining, simple in structure that can be used for is provided
6) SF of gas insulated electric apparatus
6The decomposing gas quality testing is surveyed device.The present invention according to the sulfur hexafluoride gas-insulating electrical equipment at discharge fault: SF during with local overheating fault such as shelf depreciation, arc discharge, spark discharge
6The principle of decomposing gas; Adopt elliptical mirror that the infrared signal of infrared incoherent light source radiation is become focused beam; The diverging light that can effectively area source be produced focuses on, thereby has strengthened the power density of incident light, utilizes the method for off-resonance optoacoustic spectroscopy at last; In certain wavelength coverage, realize modulation continuously, detect SF
6The component of feature decomposition gas and content, and analyze and judge the internal abnormality situation of electrical equipment according to this.The present invention has advantages such as gas consumption is few, accuracy of detection is high, detection time is short at interval, do not drift about zero point, many components detect simultaneously, maintenance is little, is applicable to the on-line continuous monitoring of inside electric appliance fault.
The present invention adopts off-resonance infrared photoacoustic spectra technology, and infrared light supply is focused in the off-resonance photoacoustic cell through elliptical mirror, and the photoacoustic signal of generation detects via microphone and signal processing component, thereby obtains SF in the photoacoustic cell
6And information such as the composition of decomposition gas and content.Optoacoustic spectroscopy is based on the technology of optoacoustic effect; Its mechanism is excited after gas molecule absorbs the luminous energy of periodic modulation; Immediately to discharge the mode de excitation of heat energy; The heat energy that discharges makes gas produce pressure wave, and the proportional relation of the concentration of pressure wave intensity and gas molecule just can obtain the concentration of gas composition through the detected pressures wave intensity.Different gas compositions absorbs the luminous energy of different wave length, selects the different component of gas through the wavelength that changes incident light wave.The principle of off-resonance optoacoustic spectroscopy is when the modulating frequency of incident light during far below the resonant frequency of photoacoustic cell lowest-order normal mode; Photoacoustic cell works in the off-resonance pattern; The wavelength of sound wave is much larger than the cavity size of photoacoustic cell at this moment; Can't set up traveling-wave field and stationary field, in the photoacoustic cell everywhere acoustic pressure equate basically and along with the variation of the modulating frequency of incident light and change.
The invention is characterized in the defective that is prone to disperse to infrared light supply, adopt elliptical mirror that optical radiation is focused in the photoacoustic cell, strengthened luminous power in the chamber; And the off-resonance photoacoustic cell that adopts has that volume is little, the detection sensitivity advantages of higher, and its characteristics simple in structure, easy to use are easy to the instrument miniaturization design.To SF
6And there is the problem of juxtaposition in the infrared absorption peak of decomposition gas, employing photocaustic spectroscopy while on-line monitoring SF
6, CF
4, SO
2F
2, SOF
2, SO
2, SF
4, H
2The content of multiple gases such as O, and analyze SF according to this
6The quantitative relativity of decomposed gas component, concentration and device interior fault, diagnosis SF
6The internal fault of gas insulated electric apparatus is also sent alerting signal.The present invention requires low to the selection of gas infrared absorption peak, can effectively get rid of the cross interference of multiple gases, and accuracy of detection is high, resolution is high.
Check and analysis device of the present invention is mainly used in the SF behind the detection module failure to be detected
6Decomposition gas.Module to be detected can be SF
6Insulation fault simulation system in gas insulated electric apparatus or the laboratory.The air chamber interface of module to be detected is connected with the optoacoustic spectroscopy detection module with flowmeter through flue, and flowmeter is used for measuring feeding gas.
Check and analysis device of the present invention mainly is made up of the optoacoustic spectroscopy detection module.Described optoacoustic spectroscopy detection module is characterised in that the infrared absorption peak that can cover SF6 and decomposition gas thereof, and can get rid of the juxtaposition that each gas exists through filtering device, also effectively gets rid of the cross interference of other gases, and resolution is high.Described optoacoustic spectroscopy detection module mainly comprises light source module, photoacoustic signal generation module, measuring light power module and Analysis on Fault Diagnosis module.Light source module produces has SF
6The light of analyte characteristic absorption peak wavelength; Comprise SOF
2, SO
2, CF
4, SO
2F
2, H
2S and CO
2Deng.The light that light source module produces is incident in the off-resonance photoacoustic cell in the photoacoustic signal generation module.The photoacoustic signal generation module is used to produce SF
6And the photoacoustic signal of decomposition gas and convert electric signal into.The light beam of described off-resonance photoacoustic cell outgoing is by the average power of induction of measuring light power module and detection light beam.The photoacoustic signal generation module links to each other with the Analysis on Fault Diagnosis module through cable with the measuring light power module, imports in the Analysis on Fault Diagnosis module through the RS322/485 line through the signal of photoacoustic signal generation module and collection of measuring light power module and processing, is used to calculate SF
6And the concentration of decomposition gas, and analyze SF
6Decomposed gas component, concentration, diagnosis SF
6The internal fault of gas insulated electric apparatus is also sent alerting signal.
Described light source module comprises copped wave blade and copped wave controller, signal cable, optical filter wheel and the narrow band pass filter of infrared incoherent light source, elliptical mirror, optical chopper.Wherein, Two geometrical focuss are arranged on the long axis of elliptical mirror; Described infrared incoherent light source places on the near-end focus of elliptical mirror; Narrow band pass filter is installed in the optical filtering film perforation on the described optical filter wheel, and the copped wave blade is between infrared incoherent light source and narrow band pass filter.Described elliptical mirror converges at the far-end along of elliptical mirror long axis to the infrared beam of infrared incoherent light source radiation, thereby has strengthened the power density of incident light.The control port of described copped wave controller links to each other with the copped wave blade through signal cable; The output port of copped wave controller links to each other through signal cable with the lock-in amplifier of photoacoustic signal generation module, and the chopping frequency of copped wave blade frequency as a reference is sent to lock-in amplifier by the output port of copped wave controller.Light beam after elliptical mirror focuses on is modulated into the infrared light pulse with certain frequency through said copped wave blade, is formed the monochromatic light of specific wavelength then by narrow band pass filter filtering.The axle center conllinear collimation of the copped wave hole of infrared incoherent light source, copped wave blade, narrow band pass filter.
The mirror surface of described elliptical mirror is coated with the anti-film of increasing of one deck infrared band, increases anti-film the most of or almost whole light of incident light is reflected back; Described narrow band pass filter can make the light transmission of a certain wavelength band and the light of other wavelength band is ended, and makes the light and the SF that incide in the photoacoustic cell
6The wavelength coverage of the characteristic absorption peak of certain analyte is consistent.According to SF
6And the characteristic infrared absorption crest of decomposition gas, the centre wavelength of described narrow band pass filter is respectively 5848 μ m (SF
6), 6658 μ m (SO
2F
2), 7463 μ m (SOF
2), 8680 μ m (SO
2), 7824 μ m (CF
4), 11223 μ m (SF
4) and 7143 μ m (H
2O).As increase the optical filter of other analyte, only need characteristic infrared absorption crest based on this gas carry out corresponding narrow band pass filter and select to get final product.Described copped wave blade is furnished with low frequency copped wave blade and high frequency chopping blade, and the scope of its chopping frequency is 400Hz ~ 3.7kHz.
Described photoacoustic signal generation module mainly comprises off-resonance photoacoustic cell, microphone and lock-in amplifier.Wherein, Microphone comprises prime amplifier and microphone; Be fixed on the housing of off-resonance photoacoustic cell and be used for converting photoacoustic signal into electric signal; Microphonic output terminal links to each other with lock-in amplifier through power supply, signal cable, and lock-in amplifier carries out signal condition and noise processed to the electric signal of microphone output.Because infrared incoherent light source is the area source of dispersing, attenuated optical signal is big, and for shortening light path, described off-resonance photoacoustic cell adopts the compact small scale structures.Described off-resonance photoacoustic cell mainly comprises optoacoustic cavity, light inlet window, bright dipping window, tensimeter meter and valve etc., and its concrete structure is: the optoacoustic cavity is a circular cylindrical cavity; The axial two ends of optoacoustic cavity have manhole, are respectively light inlet and light-emitting window, and light inlet window and bright dipping window are fixed on the described manhole with flange respectively; An end axial perpendicular to the optoacoustic cavity has manhole; Be air inlet/outlet, air inlet/outlet is connected with the flange that is welded with steel pipe, and the steel pipe outer end is connected to teflon hose and three-way connection; The tensimeter meter links to each other with an end of three-way connection, and the other end of three-way connection passes through ball valve sealing; The top, inwall middle part of optoacoustic cavity is provided with manhole, and microphone is fixed and is sealed on the described manhole with flange.The axial centre of light inlet, light-emitting window and optoacoustic cavity is on same horizontal line.The wavelength coverage that sees through of said incident window and outgoing window is respectively 1 μ m ~ 9 μ m and 1 μ m ~ 23 μ m, and transmittance is greater than 90%.Said microphonic frequency response range is 20Hz ~ 20kHz, and sensitivity is 50mV/Pa.The frequency range of said lock-in amplifier is 1mHz ~ 102.4kHz, and sensitivity is 2nV ~ 1V, and gain accuracy is ± 1%, dynamic memory>100dB, stability is 5ppm/ ℃, two kinds of interfaces of GPIB and RS232.The output port of the copped wave controller in the light source module links to each other through signal cable with described lock-in amplifier, in the light source module chopping frequency of copped wave blade as a reference frequency be sent to lock-in amplifier by the output port of copped wave controller.
Described measuring light power module comprises optical power sensor and light power meter.Optical power sensor is connected with light power meter through optical fiber, is used for the average output power of sensed light signal.The spectral response range of said optical power sensor and light power meter is 190nm ~ 20 μ m, and the power measurement scope is 50mW ~ 300W, and the average power that is suitable for light signal is measured.
Said measuring light power module is arranged in the outside of photoacoustic signal generation module off-resonance photoacoustic cell outgoing window, and described light source module is arranged in the outside of photoacoustic signal generation module off-resonance photoacoustic cell incident window.Optical power sensor in infrared incoherent light source in the light source module, the chopping the light hole of copped wave blade, narrow band pass filter and the measuring light power module detects mouth, the axle center conllinear collimation of four axle center and off-resonance photoacoustic cell.
Described Analysis on Fault Diagnosis module mainly comprises embedded host, monitoring analysis unit, display screen, storer and alarm.Wherein, Embedded host is photoacoustic signal through the RS485/232 cable links to each other the output processing with lock-in amplifier after; Link to each other with light power meter through the USB wiring simultaneously; Export average optical power signals, and calculate the gas concentration value of each component and analyze SF through the monitoring analysis unit that embedded host includes
6The running status of gas insulated electric apparatus; Display screen links to each other with embedded host through cable respectively with storer, in order to show and to preserve the Calculation results of monitoring analysis unit; Alarm links to each other with embedded host through cable, in case the Calculation results of monitoring analysis unit surpasses preset threshold, starts alarm equipment alarm.
Principal feature of the present invention is following:
(1) light source module that has an infrared incoherent light source can effectively strengthen light signal, and stable performance, the life-span is long and it is little to decay, and can realize SF
6, CF
4, SO
2F
2, SOF
2, SO
2, S
2F
10, SF
4, H
2The detection by quantitative of multiple gases such as O, accuracy of detection height and reliability are high.
(2) the detected each component concentration of the present invention can present the good linear relation in 1～500ppm scope, and is highly sensitive, minimum detectable level≤0.05ppm (μ l/L).
(3) the present invention the selection of the infrared absorption peak of gas is required low, relevant source see through narrow bandwidth, can effectively get rid of the phase mutual interference when organizing gas more and having juxtaposition and carry out high Precision Detection, detect when can realize multicomponent gas.
(4) apparatus of the present invention inferred-zero drift need not periodically to demarcate, and environment measuring is not had specific (special) requirements, can accomplish non-maintaining even few maintenance, and long-term work is reliable and stable, and apparatus structure is simple, is suitable for on-the-spot the detection.
(5) time interval of twice detection of apparatus of the present invention weak point, required appearance gas is few, can be effective to SF
6The on-line continuous monitoring of gas insulated electric apparatus.
(6) the present invention can be widely used in SF
6SF under the insulation faults such as the shelf depreciation of gas insulated electric apparatus or experimental simulation device, spark discharge, arc discharge and local overheating
6And the analyzing and diagnosing of the detection of decomposition gas and insulation fault, be applicable to status monitoring, fault diagnosis and the failure mechanism analysis etc. of the equipment of electrical network scene, scientific research, manufacturing production firm.
Description of drawings
SF during Fig. 1-1 laboratory simulation insulation fault
6And the detection synoptic diagram of decomposition product;
The SF of Fig. 1-2 SF6 gas insulated electric apparatus
6And the detection synoptic diagram of decomposition product;
The wiring diagram of Fig. 2-1 optoacoustic spectroscopy detection module 8;
The schematic diagram of Fig. 2-2 optoacoustic spectroscopy detection module 8;
The structural representation of Fig. 3 off-resonance photoacoustic cell 14;
The structural representation of Fig. 4 Analysis on Fault Diagnosis module;
SF when Fig. 5 shelf depreciation and spark discharge fault
6And the schematic diagram of decomposition product detection;
SF during Fig. 6 arc discharge fault
6And the schematic diagram of decomposition product detection;
SF during Fig. 7 local overheating fault
6And the schematic diagram of decomposition product detection;
Among the figure: the insulation fault simulation system in 1 laboratory, 2 concentric cable, 3 oscillographs, 4 valves, 5 flues, 6 flowmeters, 7 vacuum pumps, 8 optoacoustic spectroscopy detection modules, 9SF
6Gas insulated electric apparatus, 2-1 light source module, 2-2 photoacoustic signal generation module, 2-3 measuring light power module, 2-4 Analysis on Fault Diagnosis module, 10 infrared incoherent light sources; 11 elliptical mirrors, 12 copped wave blades, 13 signal cables, 14 copped wave controllers, 15 optical filter wheels and narrow band pass filter, 16 signal cables; 17 off-resonance photoacoustic cells, 18 microphones, 19 signal cables, 20 lock-in amplifiers, 21 optical power sensors; 22 optical fiber, 23 light power meters, 24USB wiring, 25 embedded hosts, 26RS485/232 cable, 27 incident windows; 28 optoacoustic cavitys, 29 outgoing windows, 30 air inlet/outlets, 31 monitoring analysis unit, 32 display screens; 33 storeies, 34 alarms, 35 shelf depreciations or spark discharge generating module, 36 discharge analogue means, 37 arc discharge generating meanss; 38 arc discharge analogue means, 39 temperature indicators, 40 platinum filaments are crossed warmware, 41 experimental boxs, 42 local overheating modules.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done and to further describe.
Check and analysis device of the present invention mainly comprises module to be detected and optoacoustic spectroscopy detection module 8.Module to be detected can be insulation fault simulation system 1 or the SF in the laboratory
6Gas insulated electric apparatus 9.The air chamber interface of module to be detected is connected with optoacoustic spectroscopy detection module 8 with flowmeter 6 through flue 5, and flowmeter 6 is used to measure the gas flow that feeds flue 5.
Shown in Fig. 1-1, the insulation fault simulation system 1 in the laboratory mainly comprises fault generating module and fault simulation device.Laboratory insulation fault simulation system 1 connects flues 5 through valve 4, then flue 5 through valve respectively with vacuum pump 7 with link to each other with the air inlet/outlet 30 of photoacoustic cell, be used to vacuumize or detect SF
6And the concentration of decomposition gas.Flowmeter 6 is used to measure the gas flow that feeds flue 5.When the laboratory simulation insulation fault, before the detection, the fault simulation device of 7 pairs of laboratories of vacuum pump insulation fault simulation system 1 vacuumizes and cleans.After cleaning finishes, in the fault simulation device of laboratory insulation fault simulation system, feed SF
6Gas.The insulation fault simulated experiment of being correlated with then.Experiment is opened valve 4 after finishing, and indicates according to the gas flow of flowmeter 6 gas is fed the SF that optoacoustic spectroscopy detection module 8 carries out under the arc discharge
6And the concentration of decomposition gas detects.Experiment is opened valve 4 after finishing, and indicates according to the gas flow of flowmeter 6 gas is fed the SF that optoacoustic spectroscopy detection module 8 carries out under the arc discharge
6And the concentration of decomposition gas detects.
Shown in Fig. 1-2, SF
6The air chamber interface of gas insulated electric apparatus 9 is connected with optoacoustic spectroscopy detection module 8 with flowmeter 6 through flue 5, is used for SF
6The on-line monitoring of gas insulated electric apparatus.Be specially SF
6The air chamber interface of gas insulated electric apparatus 1-1 is connected through the air inlet/outlet 30 of flue 5 with flowmeter 6, resonance photoacoustic cell 14, and flowmeter is used for the measurement gas flow.
Shown in Fig. 2-1, said optoacoustic spectroscopy detection module mainly comprises light source module 2-1, photoacoustic signal generation module 2-2, measuring light power module 2-3 and Analysis on Fault Diagnosis module 2-4.The infrared signal of the infrared incoherent light source radiation among the light source module 2-1 forms the light of specific wavelength after 12 modulation of copped wave blade, the narrow band pass filter 15 of reflective mirror focusing, optical chopper filter; Be incident to photoacoustic signal generation module 2-2 then; Photoacoustic signal generation module 2-2 is connected with Analysis on Fault Diagnosis module 2-4 through cable, and measuring light power module 2-3 is connected with computing machine through the USB wiring.Light source module 2-1 is used for producing covering SF
6And the focused beam of decomposition gas infrared absorption wave band, photoacoustic signal generation module 2-2 takes place and treatment S F
6And the place of the photoacoustic signal of decomposition gas, measuring light power module 2-3 is used to respond to and detect the average power of focused beam, and Analysis on Fault Diagnosis module 2-4 is used to calculate SF
6And the concentration of decomposition gas and diagnosis SF
6The internal fault of gas insulated electric apparatus is also reported to the police.
Shown in Fig. 2-2, described light source module comprises copped wave blade 12 and copped wave controller 14, signal cable 13 and 16, optical filter wheel and the narrow band pass filter 15 of infrared incoherent light source 10, elliptical mirror 11, optical chopper.Wherein, Two geometrical focuss are arranged on the long axis of elliptical mirror 11; Described infrared incoherent light source 10 places on the near-end focus of elliptical mirror 11; Narrow band pass filter 15 is installed in the optical filtering film perforation on the described optical filter wheel, and copped wave blade 12 is between infrared incoherent light source 10 and narrow band pass filter 15.Described elliptical mirror 11 converges at the far-end along of elliptical mirror 11 long axis to the infrared beam of infrared incoherent light source 10 radiation, thereby has strengthened the power density of incident light.The control port of described copped wave controller 14 links to each other with the copped wave blade through signal cable 13; The output port of copped wave controller 14 links to each other through signal cable 16 with the lock-in amplifier 20 of photoacoustic signal generation module, and the chopping frequency of copped wave blade 12 frequency as a reference is sent to lock-in amplifier 20 by the output port of copped wave controller 14.Light beam after elliptical mirror 11 focuses on is modulated into the infrared light pulse with certain frequency through said copped wave blade 12, then by the monochromatic light of narrow band pass filter 15 filtering formation specific wavelength.Infrared incoherent light source 10, the copped wave hole of copped wave blade 12, the axle center conllinear collimation of narrow band pass filter 15.
Described photoacoustic signal generation module mainly comprises off-resonance photoacoustic cell 17, microphone 18, signal cable 19, lock-in amplifier 20.Wherein, microphone 18 is through on the housing that is bolted to optoacoustic cavity 28 in the resonance photoacoustic cell 17, and the input end of microphone 18 is connected with optoacoustic cavity 28 through signal cable 19, and microphone 18 is used for SF
6And the decomposition gas photoacoustic signal converts electric signal into, exports lock-in amplifier 20 then to and carries out signal condition and noise processed.
Described measuring light power module comprises optical power sensor 21, optical fiber 22, light power meter 23 and USB wiring 24, and optical power sensor 21 is connected with light power meter 23 through optical fiber 22, the average output power of sensed light signal.The axle center conllinear collimation of the detection mouth axle center of incoherent infrared light source 10, narrow band pass filter 15, optical power sensor 21 and off-resonance photoacoustic cell 17.The photoacoustic signal through RS485/232 cable 26 links to each other the output processing with lock-in amplifier 20 after of embedded host 25; While embedded host 25 links to each other with light power meter 23 through USB wiring 24 and exports the average power signal; Analysis on Fault Diagnosis module 2-4 utilizes monitoring analysis unit 31 to combine the gas concentration value of each components of calculating such as average output power of photoacoustic signal, light signal then, and the diagnosis internal fault is also reported to the police.
As shown in Figure 3, off-resonance photoacoustic cell 17 mainly includes optical window sheet 27, optoacoustic cavity 28, bright dipping window 29 and air inlet/outlet 30 etc.Concrete structure is: optoacoustic cavity 28 is circular cylindrical cavity, and its material is brass or stainless steel.The axial two ends of optoacoustic cavity 28 have manhole, are respectively light inlet and light-emitting window, and light inlet window 27 is fixed on described light inlet and the light-emitting window with flange respectively with bright dipping window 29; An end axial perpendicular to the optoacoustic cavity has manhole; Be air inlet/outlet 30, air inlet/outlet 30 is connected with the flange that is welded with steel pipe, and the steel pipe outer end is connected to teflon hose and three-way connection; The tensimeter meter links to each other with an end of three-way connection, and the other end of three-way connection passes through ball valve sealing; The top, inwall middle part of optoacoustic cavity 28 is provided with manhole, and microphone 16 usefulness flanges are fixed and are sealed on the described manhole.The axial centre of light inlet, light-emitting window and optoacoustic cavity is on same horizontal line.The material of said incident window and outgoing window is calcium fluoride (CaF2) or zinc selenide (ZnSe), and it sees through wavelength coverage and is respectively 1 μ m ~ 9 μ m and 1 μ m ~ 23 μ m, and transmittance is greater than 90%.
As shown in Figure 4, Analysis on Fault Diagnosis module 2-4 mainly comprises embedded host 25, monitoring analysis unit 31, display screen 32, storer 33 and alarm 34.Wherein, be contained in the monitoring analysis unit 31 in the embedded host 25, be used to calculate SF
6And the concentration of decomposition gas.And, analyze SF according to relevant State Standard of the People's Republic of China and power industry standard
6The corresponding relation of situations such as decomposition gas and equipment operation, maintenance, diagnosis SF
6The internal fault of gas insulated electric apparatus.Display screen 32 links to each other with embedded host 25 through cable respectively with storer 33, in order to show and to preserve the Calculation results of monitoring analysis unit 31; Alarm 34 links to each other with embedded host 25 through cable, in case the Calculation results of monitoring analysis unit 31 surpasses preset threshold, alarm 34 starts and reports to the police.
During detection; The light that infrared incoherent light source 10 produces is through the copped wave blade 12 of elliptical mirror 11, optical chopper and the light of narrow band pass filter 15 back formation specific wavelengths; In incident window 27 incides off-resonance photoacoustic cell 17, on the gas that feeds off-resonance photoacoustic cell 17 through flue 5, air inlet/outlet 29, produce photoacoustic signal then.Photoacoustic signal converts electric signal into and carries out signal condition and filtering noise after signal cable 19 is sent to lock-in amplifier 20 after microphone 18 amplifies; The chopping frequency of copped wave blade 12 frequency as a reference is sent to lock-in amplifier 20 by the output port of copped wave controller 14 through signal cable 16, and the signal after lock-in amplifier 20 is handled links to each other with embedded host 25 through RS485/232 cable 26 and exports photoacoustic signal.Simultaneously; The light that incides the off-resonance photoacoustic cell passes outgoing window 29 backs and is linked to each other with light power meter 23 through optical fiber 22 by optical power sensor 21; The average output power of measuring light signal, light power meter 23 is through the USB wiring 24 output power signal that links to each other with embedded host 25.The monitoring analysis unit 31 that embedded host 25 includes combines photoacoustic signal, light signal output power etc. to calculate the gas concentration value of each component and the fault of diagnostic analysis equipment, and Calculation results shows respectively and is stored on display screen 32 and the storer 33.In case the Calculation results of monitoring analysis unit 31 surpasses preset threshold, alarm 34 starts and reports to the police.
After detecting end, open the valve that is connected air inlet/outlet 30, the gas in the off-resonance photoacoustic cell 17 is discharged through air inlet/outlet 30, then vacuum pump 7 is linked to each other with the air inlet/outlet 30 of off-resonance photoacoustic cell 17 through flue, clean the off-resonance photoacoustic cell.
When shelf depreciation or spark discharge fault take place when, SF
6Gas can decompose generation SF
4, SOF
2, CF
4, SO
2F
2And S
2F
10Deng gas, if contain moisture H in the equipment
2O, then SOF
2Can further be decomposed into SO
2Therefore, work as SF
6When gas insulated electric apparatus generation shelf depreciation or spark discharge fault, when perhaps in the laboratory, simulating shelf depreciation or spark discharge fault, through 8 couples of SF of optoacoustic spectroscopy detection module with reference to Fig. 5
6And H
2O detects, and can analyze SF
6The purity of gas and impurity content are to SF
4, SOF
2, CF
4, SO
2F
2, and SO
2Detect, can analyze SF
6Whether air insulating device has produced shelf depreciation or the spark discharge fault and the fault order of severity.Detection schematic diagram when Fig. 5 is laboratory simulation shelf depreciation or spark discharge.Reference is like Fig. 5; Shelf depreciation or spark discharge generating module 35 link to each other with discharge analogue means 36; Discharge analogue means 36 links to each other with vacuum pump 7 with flue 5 through valve 4, is connected with optoacoustic spectroscopy detection module 8 with flowmeter 6 through another root flue 5 simultaneously.
When the arc discharge fault takes place when, SF
6Gas can decompose generation SF
4, SOF
2, CF
4, SO
2F
2Deng gas, if contain moisture H in the equipment
2O, then SOF
2Can further be decomposed into SO
2Therefore, work as SF
6When gas insulated electric apparatus generation shelf depreciation or spark discharge fault, perhaps with reference to Fig. 6 in the laboratory during analog electrical arc discharge fault, through 8 couples of SF of optoacoustic spectroscopy detection module
6And H
2O detects and can analyze SF
6The purity of gas and impurity content are to SF
4, SOF
2, CF
4, SO
2F
2, SO
2And S
2F
10Detect and to analyze SF
6Whether air insulating device has produced the arc discharge fault and the fault order of severity.Detection schematic diagram when Fig. 6 is the laboratory simulation arc discharge.As shown in Figure 6; Arc discharge generating means 37 links to each other with arc discharge analogue means 38; Arc discharge analogue means 37 links to each other with vacuum pump 7 with flue 5 through valve 4, is connected with optoacoustic spectroscopy detection module 8 with flowmeter 6 with another root flue 5 through other valve 4 simultaneously.
When the local overheating fault takes place when, SF
6Gas can decompose generation SF
4, SOF
2, SO
2F
2Deng gas, if contain moisture H in the equipment
2O, then SOF
2Can further be decomposed into SO
2Therefore, work as SF
6During gas insulated electric apparatus generation local overheating fault, when perhaps in the laboratory, simulating the local overheating fault, through 8 couples of SF of optoacoustic spectroscopy detection module with reference to Fig. 7
6And H
2O detects, and can analyze SF
6The purity of gas and impurity content are to SF
4, SOF
2, SO
2F
2And SO
2Detect, can analyze SF
6Whether air insulating device has produced the local overheating fault and the fault order of severity.Detection schematic diagram when Fig. 7 is laboratory simulation local overheating fault.With reference to Fig. 7, in the local overheating module 42, platinum filament is crossed warmware 40 and is positioned at experimental box 41 and links to each other with power supply, platinum filament is crossed warmware 40 feed electric currents and can simulate the local overheating fault, and temperature indicator 39 is used for measuring the temperature that platinum filament is crossed warmware 40.The experimental box 41 of local overheating module 42 links to each other with vacuum pump 7 with flue 5 through valve 4, is connected with optoacoustic spectroscopy detection module 8 with flowmeter 6 with another root flue 5 through other valve 4 simultaneously.
Claims (10)
1. an off-resonance optoacoustic spectroscopy check and analysis device is characterized in that described pick-up unit is made up of optoacoustic spectroscopy detection module (8); Described optoacoustic spectroscopy detection module (8) comprises light source module (2-1), photoacoustic signal generation module (2-2), measuring light power module (2-3) and Analysis on Fault Diagnosis module (2-4); The light beam that described light source module (2-1) produces is incident in the off-resonance photoacoustic cell of photoacoustic signal generation module (2-2), and photoacoustic signal generation module (2-2) is used to produce SF
6And the photoacoustic signal of decomposition gas and convert described photoacoustic signal into electric signal, the light beam of described off-resonance photoacoustic cell outgoing is by measuring light power module (2-3) induction and detect the average power of light beam; Described photoacoustic signal generation module (2-2) links to each other with Analysis on Fault Diagnosis module (2-4) with measuring light power module (2-3); Signal through photoacoustic signal generation module (2-2) and measuring light power module (2-3) collection and processing transfers in the Analysis on Fault Diagnosis module (2-4), and Analysis on Fault Diagnosis module (2-4) is calculated SF
6And the concentration of decomposition gas, and analyze SF
6Decomposed gas component, concentration, diagnosis SF
6The internal fault of gas insulated electric apparatus is also sent alerting signal.
2. off-resonance optoacoustic spectroscopy check and analysis device according to claim 1; It is characterized in that described light source module (2-1) comprises infrared incoherent light source (10), elliptical mirror (11), optical chopper, optical filter wheel and narrow band pass filter group (15); Described infrared incoherent light source places on the near-end focus on the long axis of elliptical mirror; One group of narrow band pass filter is installed in the optical filtering film perforation on the described optical filter wheel; Optical chopper comprises copped wave blade (12) and copped wave controller (14), and copped wave blade (12) is between infrared incoherent light source and narrow band pass filter, and the control port of copped wave controller (14) links to each other with copped wave blade (12) through signal cable; The mirror surface of described elliptical mirror is coated with the anti-film of increasing of one deck infrared band, converges at the infrared beam of infrared incoherent light source radiation the far-end along of elliptical mirror long axis; The axle center conllinear collimation of the copped wave hole of infrared incoherent light source, optical chopper, narrow band pass filter.
3. off-resonance optoacoustic spectroscopy check and analysis device according to claim 2; It is characterized in that; The output port of described copped wave controller (14) links to each other through signal cable with the lock-in amplifier of photoacoustic signal generation module (2-2), and the chopping frequency of copped wave blade frequency as a reference is sent to lock-in amplifier by the output port of copped wave controller; Light beam after elliptical mirror focuses on is modulated into the infrared light pulse with certain frequency through said copped wave blade, is formed the monochromatic light of specific wavelength by described narrow band pass filter filtering.
4. off-resonance optoacoustic spectroscopy check and analysis device according to claim 2 is characterized in that the mirror surface of described elliptical mirror (11) is coated with the reflection enhancing coating of one deck infrared band.
5. off-resonance optoacoustic spectroscopy check and analysis device according to claim 1 is characterized in that described photoacoustic signal generation module (2-2) comprises off-resonance photoacoustic cell (17), microphone (18) and lock-in amplifier (20); Described microphone (18) is fixed on the housing of optoacoustic cavity (28) in the off-resonance photoacoustic cell (17); The input end of microphone (18) is connected with optoacoustic cavity (28); Microphonic output terminal links to each other with lock-in amplifier (20) through power supply, signal cable, and microphone (18) is used for SF
6And the decomposition gas photoacoustic signal converts electric signal into, exports lock-in amplifier (20) then to and carries out signal condition and noise processed.
6. off-resonance optoacoustic spectroscopy check and analysis device according to claim 1 is characterized in that described measuring light power module (2-3) mainly comprises optical power sensor (21) and light power meter (23); Optical power sensor (21) is connected with light power meter (23) through optical fiber (22), the average output power of induction and sensed light signal; The detection mouth axle center of described infrared incoherent light source (10), narrow band pass filter (15), optical power sensor (21) and the axle center conllinear collimation of described off-resonance photoacoustic cell (17); Embedded host (25) links to each other with lock-in amplifier (20) through RS485/232 cable (26); Photoacoustic signal after output is handled; Embedded host (25) links to each other with light power meter (23) through USB wiring (24) simultaneously; Output average light power signal, Analysis on Fault Diagnosis module (2-4) utilize monitoring analysis unit (31) to combine the average power of photoacoustic signal, light signal to calculate the gas concentration value of each component, on-line monitoring SF
6Gas insulated electric apparatus also carries out fault diagnosis, reports to the police when surpassing setting threshold.
7. off-resonance optoacoustic spectroscopy check and analysis device according to claim 1 is characterized in that described off-resonance photoacoustic cell (17) mainly comprises incident window (27), optoacoustic cavity (28), outgoing window (29) and air inlet/outlet (30); Optoacoustic cavity (28) is a circular cylindrical cavity; The axial two ends of optoacoustic cavity (28) have manhole, are respectively light inlet and light-emitting window, and light inlet window (27) and bright dipping window (29) are fixed on described light inlet and the light-emitting window with flange respectively; Have air inlet/outlet (30) perpendicular to the axial end of optoacoustic cavity; Air inlet/outlet (30) is connected with the flange that is welded with steel pipe; The steel pipe outer end is connected to teflon hose and three-way connection, and the tensimeter meter links to each other with an end of three-way connection, and the other end of three-way connection passes through ball valve sealing; The top, inwall middle part of optoacoustic cavity (28) is provided with manhole, and microphone (18) is fixed and be sealed on the described manhole with flange; The axial centre of described light inlet, light-emitting window and optoacoustic cavity (28) is on same horizontal line.
8. off-resonance optoacoustic spectroscopy check and analysis device according to claim 1; It is characterized in that described Analysis on Fault Diagnosis module (2-4) comprises embedded host (25), monitoring analysis unit (31), display screen (32), storer (33) and alarm (34); Be contained in the described monitoring analysis unit (31) in the embedded host (25), be used to calculate SF
6And the concentration of decomposition gas, carry out fault diagnosis; Described alarm (34) links to each other with embedded host (25), in case the Calculation results of monitoring analysis unit (31) surpasses preset threshold, alarm (34) starts and reports to the police.
9. off-resonance optoacoustic spectroscopy check and analysis device according to claim 1 is characterized in that described module to be detected is SF
6Gas insulated electric apparatus (1-1), described SF
6The air chamber interface of gas insulated electric apparatus (1-1) is through flue (5), flowmeter (6), and the air inlet/outlet (30) of off-resonance photoacoustic cell (17) connects.
10. off-resonance optoacoustic spectroscopy check and analysis device according to claim 1; It is characterized in that; Described module to be detected is the insulation fault simulation system (1-2) in the laboratory; Insulation fault simulation system (1-2) in the described laboratory connects flue (5) through valve (4), again by flue (5) respectively with vacuum pump (7) with link to each other with the air inlet/outlet (30) of off-resonance photoacoustic cell (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101694218A CN102661918A (en) | 2012-05-28 | 2012-05-28 | Off-resonance photoacoustic spectrometric detection and analysis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101694218A CN102661918A (en) | 2012-05-28 | 2012-05-28 | Off-resonance photoacoustic spectrometric detection and analysis device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102661918A true CN102661918A (en) | 2012-09-12 |
Family
ID=46771451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101694218A Pending CN102661918A (en) | 2012-05-28 | 2012-05-28 | Off-resonance photoacoustic spectrometric detection and analysis device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102661918A (en) |
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163087A (en) * | 2013-02-03 | 2013-06-19 | 江苏舒茨测控设备有限公司 | Method of adopting photoacoustic spectrometry method to detect concentration of sulfuryl fluoride residual gas |
| CN103868853A (en) * | 2014-03-12 | 2014-06-18 | 中国科学院电工研究所 | Radial resonant photo-acoustic cell for monitoring decomposition process of SF6 (sulfur hexafluoride) gas in real time |
| CN104198427A (en) * | 2014-09-09 | 2014-12-10 | 中国科学院电工研究所 | Photo-acoustic spectrometry detection device utilizing radial structure |
| CN104198394A (en) * | 2014-09-09 | 2014-12-10 | 中国科学院电工研究所 | Photoacoustic spectrometry detection device with detachable optical filter plate structure |
| CN104614338A (en) * | 2015-02-27 | 2015-05-13 | 上海集成电路研发中心有限公司 | Infrared gas analytical equipment and analytical method thereof |
| CN105548024A (en) * | 2016-01-14 | 2016-05-04 | 湖北索瑞电气有限公司 | Photoacoustic spectrometry gas detection device based on pulse infrared light source |
| CN105738186A (en) * | 2016-03-02 | 2016-07-06 | 国网河南省电力公司济源供电公司 | SF6 decomposed gas detecting method |
| CN106092899A (en) * | 2016-05-30 | 2016-11-09 | 华中科技大学 | A kind of based on CO2the self calibration of laser instrument measures SF6the device and method of concentration |
| CN106198393A (en) * | 2016-09-21 | 2016-12-07 | 深圳市卓尔思科技有限公司 | Gases Dissolved in Transformer Oil detection device |
| CN104458634B (en) * | 2014-11-26 | 2017-02-22 | 中国科学院电工研究所 | Pulsed multi-channel photoacoustic spectrometry device for gas detection |
| CN106687798A (en) * | 2014-09-03 | 2017-05-17 | 库珀技术公司 | Optical gas sensor |
| CN107091692A (en) * | 2017-05-10 | 2017-08-25 | 北京富吉瑞光电科技有限公司 | A kind of thermal infrared imager |
| CN107290298A (en) * | 2017-07-17 | 2017-10-24 | 电子科技大学 | A kind of device and method that mixed gas is detected based on Fast Fourier Transform (FFT) |
| CN107560730A (en) * | 2017-08-24 | 2018-01-09 | 中国科学院电子学研究所 | Bicavate photo-acoustic spectrometer |
| CN107677610A (en) * | 2017-09-15 | 2018-02-09 | 大连理工大学 | A kind of cantilever beam and photoacoustic cell double resonance enhanced photo acoustic spectral detection system and method |
| CN108387527A (en) * | 2018-02-08 | 2018-08-10 | 思源电气股份有限公司 | The optoacoustic spectroscopy oil and gas detection device of cross jamming can be eliminated |
| CN108458984A (en) * | 2018-05-21 | 2018-08-28 | 郑州力创光电技术有限公司 | The online gas-monitoring control system of air insulating device based on photoelectric sensing principle |
| CN108489907A (en) * | 2018-04-10 | 2018-09-04 | 中国科学院合肥物质科学研究院 | A kind of ammonia detection device and method |
| CN108535184A (en) * | 2018-04-10 | 2018-09-14 | 大连理工大学 | A kind of optoacoustic spectroscopy multicomponent trace gas detection instrument and method |
| CN108732104A (en) * | 2018-04-18 | 2018-11-02 | 中国科学院合肥物质科学研究院 | A kind of photo-acoustic spectrometer on-line measuring device |
| CN108956521A (en) * | 2018-06-29 | 2018-12-07 | 深圳大学 | A kind of medical respiration gas concentration lwevel acquisition methods and device |
| CN109269999A (en) * | 2018-11-27 | 2019-01-25 | 国网重庆市电力公司电力科学研究院 | A kind of infrared photoacoustic spectra detection system |
| CN109374530A (en) * | 2018-10-31 | 2019-02-22 | 国网重庆市电力公司电力科学研究院 | The optoacoustic spectroscopy on-line monitoring method of sulfur hexafluoride gas decomposition product |
| CN109444049A (en) * | 2018-12-17 | 2019-03-08 | 中国科学院电工研究所 | A kind of optoacoustic spectroscopy detection device with from frequency modulation decrease of noise functions |
| CN109490217A (en) * | 2019-01-07 | 2019-03-19 | 大连理工大学 | A kind of multi-cavity superposing type off-resonance photoacoustic cell and gas detecting system |
| CN109765184A (en) * | 2019-01-16 | 2019-05-17 | 深圳供电局有限公司 | Optical gas absorbance pond and optical gas detection system |
| CN111551502B (en) * | 2020-05-29 | 2021-06-29 | 华中科技大学 | Non-resonant photoacoustic spectroscopy system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080196477A1 (en) * | 2005-07-06 | 2008-08-21 | Koninklijke Philips Electronics, N.V. | Photo-Acoustic Spectrometer Apparatus |
| CN101458234A (en) * | 2009-01-08 | 2009-06-17 | 上海交通大学 | Portable power transformer fault diagnostic apparatus |
| CN101514960A (en) * | 2009-03-23 | 2009-08-26 | 吉林市中准仪表开发有限责任公司 | SF* detecting system based on photoacoustic spectroscopic technology |
| CN101982759A (en) * | 2010-09-29 | 2011-03-02 | 重庆大学 | Infrared photoacoustic spectroscopy detection device and method for decomposed components of sulfur hexafluoride under partial discharge |
| CN201853104U (en) * | 2010-11-23 | 2011-06-01 | 山东电力集团公司淄博供电公司 | Gas insulation combined electrical apparatus monitoring system |
-
2012
- 2012-05-28 CN CN2012101694218A patent/CN102661918A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080196477A1 (en) * | 2005-07-06 | 2008-08-21 | Koninklijke Philips Electronics, N.V. | Photo-Acoustic Spectrometer Apparatus |
| CN101458234A (en) * | 2009-01-08 | 2009-06-17 | 上海交通大学 | Portable power transformer fault diagnostic apparatus |
| CN101514960A (en) * | 2009-03-23 | 2009-08-26 | 吉林市中准仪表开发有限责任公司 | SF* detecting system based on photoacoustic spectroscopic technology |
| CN101982759A (en) * | 2010-09-29 | 2011-03-02 | 重庆大学 | Infrared photoacoustic spectroscopy detection device and method for decomposed components of sulfur hexafluoride under partial discharge |
| CN201853104U (en) * | 2010-11-23 | 2011-06-01 | 山东电力集团公司淄博供电公司 | Gas insulation combined electrical apparatus monitoring system |
Non-Patent Citations (1)
| Title |
|---|
| 李洋流: "基于膜分离与光声光谱的绝缘油中溶解气体在线分析技术", 《中国博士学位论文全文数据库 工程科技II辑》, 15 April 2012 (2012-04-15) * |
Cited By (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163087A (en) * | 2013-02-03 | 2013-06-19 | 江苏舒茨测控设备有限公司 | Method of adopting photoacoustic spectrometry method to detect concentration of sulfuryl fluoride residual gas |
| CN103868853A (en) * | 2014-03-12 | 2014-06-18 | 中国科学院电工研究所 | Radial resonant photo-acoustic cell for monitoring decomposition process of SF6 (sulfur hexafluoride) gas in real time |
| CN103868853B (en) * | 2014-03-12 | 2016-04-13 | 中国科学院电工研究所 | For the radial direction resonance photoacoustic cell of sulfur hexafluoride gas decomposable process Real-Time Monitoring |
| CN106687798A (en) * | 2014-09-03 | 2017-05-17 | 库珀技术公司 | Optical gas sensor |
| CN104198427A (en) * | 2014-09-09 | 2014-12-10 | 中国科学院电工研究所 | Photo-acoustic spectrometry detection device utilizing radial structure |
| CN104198394A (en) * | 2014-09-09 | 2014-12-10 | 中国科学院电工研究所 | Photoacoustic spectrometry detection device with detachable optical filter plate structure |
| CN104458634B (en) * | 2014-11-26 | 2017-02-22 | 中国科学院电工研究所 | Pulsed multi-channel photoacoustic spectrometry device for gas detection |
| CN104614338A (en) * | 2015-02-27 | 2015-05-13 | 上海集成电路研发中心有限公司 | Infrared gas analytical equipment and analytical method thereof |
| CN104614338B (en) * | 2015-02-27 | 2018-12-18 | 上海集成电路研发中心有限公司 | Infrared gas analysis equipment and its analysis method |
| CN105548024A (en) * | 2016-01-14 | 2016-05-04 | 湖北索瑞电气有限公司 | Photoacoustic spectrometry gas detection device based on pulse infrared light source |
| CN105738186A (en) * | 2016-03-02 | 2016-07-06 | 国网河南省电力公司济源供电公司 | SF6 decomposed gas detecting method |
| CN106092899A (en) * | 2016-05-30 | 2016-11-09 | 华中科技大学 | A kind of based on CO2the self calibration of laser instrument measures SF6the device and method of concentration |
| CN106092899B (en) * | 2016-05-30 | 2018-11-30 | 华中科技大学 | One kind being based on CO2The self-correcting locating tab assembly SF of laser6The device and method of concentration |
| CN106198393A (en) * | 2016-09-21 | 2016-12-07 | 深圳市卓尔思科技有限公司 | Gases Dissolved in Transformer Oil detection device |
| CN107091692A (en) * | 2017-05-10 | 2017-08-25 | 北京富吉瑞光电科技有限公司 | A kind of thermal infrared imager |
| CN107290298A (en) * | 2017-07-17 | 2017-10-24 | 电子科技大学 | A kind of device and method that mixed gas is detected based on Fast Fourier Transform (FFT) |
| CN107560730A (en) * | 2017-08-24 | 2018-01-09 | 中国科学院电子学研究所 | Bicavate photo-acoustic spectrometer |
| CN107677610A (en) * | 2017-09-15 | 2018-02-09 | 大连理工大学 | A kind of cantilever beam and photoacoustic cell double resonance enhanced photo acoustic spectral detection system and method |
| CN108387527A (en) * | 2018-02-08 | 2018-08-10 | 思源电气股份有限公司 | The optoacoustic spectroscopy oil and gas detection device of cross jamming can be eliminated |
| CN108387527B (en) * | 2018-02-08 | 2023-09-19 | 上海思源光电有限公司 | Photoacoustic spectrum oil gas detection device capable of eliminating cross interference |
| CN108489907A (en) * | 2018-04-10 | 2018-09-04 | 中国科学院合肥物质科学研究院 | A kind of ammonia detection device and method |
| CN108535184A (en) * | 2018-04-10 | 2018-09-14 | 大连理工大学 | A kind of optoacoustic spectroscopy multicomponent trace gas detection instrument and method |
| CN108732104B (en) * | 2018-04-18 | 2019-08-06 | 中国科学院合肥物质科学研究院 | A kind of photo-acoustic spectrometer on-line measuring device |
| CN108732104A (en) * | 2018-04-18 | 2018-11-02 | 中国科学院合肥物质科学研究院 | A kind of photo-acoustic spectrometer on-line measuring device |
| CN108458984A (en) * | 2018-05-21 | 2018-08-28 | 郑州力创光电技术有限公司 | The online gas-monitoring control system of air insulating device based on photoelectric sensing principle |
| CN108956521A (en) * | 2018-06-29 | 2018-12-07 | 深圳大学 | A kind of medical respiration gas concentration lwevel acquisition methods and device |
| CN109374530A (en) * | 2018-10-31 | 2019-02-22 | 国网重庆市电力公司电力科学研究院 | The optoacoustic spectroscopy on-line monitoring method of sulfur hexafluoride gas decomposition product |
| CN109269999A (en) * | 2018-11-27 | 2019-01-25 | 国网重庆市电力公司电力科学研究院 | A kind of infrared photoacoustic spectra detection system |
| CN109444049A (en) * | 2018-12-17 | 2019-03-08 | 中国科学院电工研究所 | A kind of optoacoustic spectroscopy detection device with from frequency modulation decrease of noise functions |
| CN109444049B (en) * | 2018-12-17 | 2021-05-28 | 中国科学院电工研究所 | Photoacoustic spectrum detection device with self-frequency-modulation noise-reduction function |
| CN109490217A (en) * | 2019-01-07 | 2019-03-19 | 大连理工大学 | A kind of multi-cavity superposing type off-resonance photoacoustic cell and gas detecting system |
| US20210404949A1 (en) * | 2019-01-07 | 2021-12-30 | Dalian University Of Technology | Multi-cavity superimposed non-resonant photoacoustic cell and gas detection system |
| CN109765184A (en) * | 2019-01-16 | 2019-05-17 | 深圳供电局有限公司 | Optical gas absorbance pond and optical gas detection system |
| CN111551502B (en) * | 2020-05-29 | 2021-06-29 | 华中科技大学 | Non-resonant photoacoustic spectroscopy system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102661918A (en) | Off-resonance photoacoustic spectrometric detection and analysis device | |
| Jiang et al. | Multi-gas detection in power transformer oil based on tunable diode laser absorption spectrum | |
| CN104198393B (en) | SF 6decomposed gas component on-line monitoring system and method in electrical equipment | |
| CN102539338B (en) | Online monitoring system for gas content in transformer oil by using photoacoustic spectrum | |
| Zhang et al. | Optical H2S and SO2 sensor based on chemical conversion and partition differential optical absorption spectroscopy | |
| CN106053428B (en) | A kind of petrochemical industry based on the enhancing of F-P optical signallings carries the sensing device of hydrogen pipeline gas content on-line measurement | |
| CN201853104U (en) | Gas insulation combined electrical apparatus monitoring system | |
| CN110441241B (en) | Performance evaluation device and method for photoacoustic spectroscopy multi-component gas analysis instrument | |
| CN110542839B (en) | For SF6All-optical insulation fault monitoring system of gas insulation equipment | |
| CN103411920A (en) | Portable multi-component online monitor of gas dissolved in transformer oil | |
| Luo et al. | Research on the detection of SF 6 decomposition products based on non-resonant photoacoustic spectroscopy | |
| CN112945861A (en) | Two-stage absorption acousto-optic spectroscopy insulating oil dissolved gas online monitoring system | |
| CN204008434U (en) | Gas decomposition product device in optoacoustic spectroscopy on-line monitoring SF6 electrical equipment | |
| CN110426371A (en) | A kind of system detecting the HF gas in SF6 electrical equipment | |
| CN108872124B (en) | Online carbon monoxide analyzer and heating furnace combustion control system | |
| CN109490204A (en) | A kind of device of Discharge Simulation and electric discharge decomposition gas monitoring integration | |
| CN114047136A (en) | High-sensitivity combined light source type photoacoustic spectroscopy multi-component gas detection system and method | |
| CN206161530U (en) | Sulfur hexafluoride analyte raman spectroscopy on -line monitoring analysis appearance | |
| CN105424904A (en) | Gunpowder gas ingredient testing system | |
| CN110907394A (en) | Heat tracing extraction type TDLAS gas analysis system and method | |
| CN116046280A (en) | Online monitoring system and method for greenhouse gas leakage in GIL equipment | |
| CN206557091U (en) | Toxic and harmful gas on-line monitoring system based on TDLAS technologies | |
| CN201724899U (en) | Sulfur hexafluoride gas humidity detector | |
| CN109239008A (en) | A kind of oil-immersed transformer fault detection means based on micro-nano optical fiber evanescent field | |
| CN101609043A (en) | A kind of double light path laser measurement device of concentration of sulfur hexafluoride and measuring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120912 |