CN104596945B - Radio frequency fuel oil hazard detection device - Google Patents
Radio frequency fuel oil hazard detection device Download PDFInfo
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- CN104596945B CN104596945B CN201510052026.5A CN201510052026A CN104596945B CN 104596945 B CN104596945 B CN 104596945B CN 201510052026 A CN201510052026 A CN 201510052026A CN 104596945 B CN104596945 B CN 104596945B
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- radio frequency
- fuel oil
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Abstract
The present invention discloses a kind of radio frequency fuel oil hazard detection device, for detecting electric arc/spark temperature and image to judge whether to produce the harm of radio frequency fuel oil.The device includes test device pedestal, fiber spectrometer detector, fibre optic endoscopes camera lens, optical fiber, fiber spectrometer and nitrogen injection conduit.Test device pedestal is used to fix fibre optic endoscopes camera lens and fiber spectrometer detector.Fiber spectrometer detector is used for the emission spectrum information of detected arc/spark, can calculate the temperature of electric arc/spark according to the relative spectral power of specified wavelength spectral cterm；Fibre optic endoscopes camera lens is used to gathering and recording image information in fuel tank, to detect the generation of electric arc/spark.Nitrogen is injected fuel container by nitrogen injection conduit, to guarantee discharging condition and experimental safe.Structure of the detecting device of the invention is simple, easy to maintain, it is convenient to arrange, use safety, and ensure that the accuracy of test data.
Description
Technical field
The present invention relates to a kind of radio frequency fuel oil hazard detection device, more particularly to optical fiber is applied in strong radio frequency environment
The device of endoscope and spectral analysis technique detection electric arc/spark temperature and image, belongs to technical field of electromagnetic compatibility measurement.
Background technology
The arc ignition that fuel-steam may be induced by strong radiofrequency field.Light fuel vapour, it is necessary to be provided simultaneously with following
Three conditions, i.e.,：
A) environment temperature given for, fuel vapour and air mixture ratio must be appropriate；
B) there must be enough energy in electric arc and spark, appropriate temperature is provided for igniting；
C) it is necessary to have enough arc gaps.When arc gap is too little, functioning as electrode produces heat
Thermoreceptor, causes and can not light a fire.
Above-mentioned each condition major part changes with different situations, and majority is while there are one or several products
The condition that life is lighted.
Electromagnetic energy makes volatile, inflammable fuel ignition be caused by fuel factor, that is, light and depend primarily on spark energy
Amount, but also depends on other many parameters, the composition of vapour mixture, temperature, pressure, electrode gap etc..
At present, conventional method is method of direct observation, determines the conclusion of test by the state for observing fuel tank.The method is not
Other test devices are needed, it is simple to operate, it is convenient to carry out.However, direct method of testing there is also the shortcoming that some are difficult to overcome：Directly
Connect method of testing to be only capable of carrying out qualitative analysis, its result of the test is only effective to experimental condition, because quantized data cannot be obtained,
The result of the test under other conditions cannot be assessed by test data；Because putting of being likely to occur cannot be recorded in process of the test
Electrical phenomena, thus cannot real-time monitoring, analysis and record test data, also just cannot for system improve propose reference frame.
The content of the invention
The purpose of the present invention is to overcome the shortcomings of existing method and technology, there is provided a kind of to configure convenience, flexible operation, measure
Change the temperature and the radio frequency fuel oil hazard detection device of image of electric arc/spark in surveying record fuel tank.
In order to realize above-mentioned purpose, the present invention is according to light during electric arc/spark discharge, thermal characteristics design radio frequency fuel oil danger
Evil detection means.The radio frequency fuel oil hazard detection device of the present invention includes test device pedestal, fibre optic endoscopes camera lens, light
Optical fiber spectrograph detector, optical fiber, fiber spectrometer and nitrogen injection conduit.
Fiber spectrometer detector and fibre optic endoscopes camera lens are installed on test device pedestal, and are provided with nitrogen note
Enter hole.Test device pedestal is fixed on simulation lubricator or true nozzle.In fibre optic endoscopes camera lens collection fuel tank
Image is simultaneously converted into digitized fiber-optic signal, is sent to computer via optical fiber, to detect electric arc/spark in fuel tank
Produce.The optical signal of fiber spectrometer detector detected arc/spark, and fiber spectrometer is sent to light via optical fiber
Signal carries out spectrum analysis, and Spectroscopic analysis results are sent to computer.Nitrogen injection conduit is by test device pedestal
Nitrogen hand-hole is to nitrogen injection in fuel tank.To prevent from firing the generation of danger；Because using the primary ions linear light of nitrogen
The temperature of spectrometry electric arc/spark, the nitrogen of injection is the breakdown gas for producing electric arc/spark, therefore nitrogen is carried for detection
Necessary condition is supplied
Described test device pedestal is additionally operable to block the light energy outside fuel tank, prevents the optical signal outside fuel tank from disturbing electricity
The optical signal that arc/spark is produced.Test device pedestal install after guarantee between the oil filling pipe of lubricator and inner wall of oil tank exist with
Identical discharging gap when actually used.
Described fibre optic endoscopes camera lens has three, in the symmetric position on test device pedestal, to protect
The detection to electric arc/spark image is demonstrate,proved without dead angle；Each fibre optic endoscopes camera lens is respectively by an optical fiber connection
To computer.The spectral wavelength ranges of fibre optic endoscopes shot detection are 350～1100nm.
Described fiber spectrometer detector has four, in the symmetric position on test device pedestal, to ensure
To the detection of electric arc/spark spectrum without dead angle；Each fiber spectrometer detector passes through an optical fiber and fiber spectrometer
Connection.The spectral wavelength ranges of fiber spectrometer analysis are 200～2500nm.
The present invention has the advantages that：
(1) radio frequency fuel oil hazard detection device of the invention adopts non-contact detection, convenient using arranging；
(2) aim parameter of radio frequency fuel oil hazard detection device of the invention detection is optical signal, not by radio-frequency electromagnetic environment
Affect, it is ensured that the accuracy of test data；
(3) radio frequency fuel oil hazard detection device of the invention is able to record that in fuel tank the image and temperature for producing electric arc/spark
Degree, it is possible to which assessment produces the possibility of fuel oil harm；
(4) radio frequency fuel oil hazard detection apparatus structure of the invention is simple, easy to maintain；
(5) radio frequency fuel oil hazard detection device of the invention is capable of achieving remotely control, has when volatile fuel is tested
Preferably security.
Description of the drawings
Fig. 1 is the structural representation of radio frequency fuel oil hazard detection device；
Fig. 2 is the embodiment schematic flow sheet using radio frequency fuel oil hazard detection device；
Fig. 3 is the enforcement schematic diagram using radio frequency fuel oil hazard detection device；
In figure, each component is：
1- test device pedestals, 2- fiber spectrometer detectors, 3- fibre optic endoscopes camera lenses, 4- optical fibers,
5- simulation lubricators, 6- fiber spectrometers, 7- nitrogen hand-holes, 8- nitrogen injection conduit, 9- fuel tanks.
Specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in figure 1, radio frequency fuel oil hazard detection of the present invention includes test device pedestal 1, fibre optic endoscopes camera lens
2nd, fiber spectrometer detector 3, optical fiber 4, fiber spectrometer 6 and nitrogen injection conduit 8.
Fibre optic endoscopes camera lens 2 and fiber spectrometer detector 3 are installed on test device pedestal 1, nitrogen is also provided with
Gas hand-hole 7.Test device pedestal 1 is fixed on simulation lubricator 5 or true nozzle, is fibre optic endoscopes 2 and light
Optical fiber spectrograph detector 3 provides fixed and stable test condition.Test device pedestal 1 is additionally operable to block the luminous energy outside fuel tank 9
Amount, the optical signal for preventing optical signal interference arc/spark from producing affect the accuracy of test data.Test device pedestal 1 may be used also
The necessary condition for producing electric arc/spark is provided to simulate lubricator 5 and true lubricator, the installation of test device pedestal 1 is true
Protect lubricator 9 inwall of oil filling pipe and fuel tank between exist with it is actually used when identical discharging gap, discharging gap index lead to
Often provided by user.Nitrogen hand-hole 7 is left on test device pedestal 1, conduit 8 is injected by nitrogen during test and is injected nitrogen
Gas.
Fibre optic endoscopes camera lens 2 is provided with multiple, is provided with three, installed in test device in the embodiment of the present invention
In symmetric position on pedestal 1, to ensure the detection to electric arc/spark image without dead angle.Each fibre optic endoscopes camera lens 2
All pass through an optical fiber 4 and be connected to computer.Image in fuel tank 9 is converted into digitlization by fibre optic endoscopes camera lens 2
Fiber-optic signal, image is sent to Computer display by optical fiber, and image is able to store, reproduced, so as to realize note
The function of record electric arc/spark image.The spectral wavelength ranges of the detection of fibre optic endoscopes camera lens 2 are 350～1100nm.
Fiber spectrometer detector 3 is provided with multiple, is provided with four, installed in test device base in the embodiment of the present invention
In symmetric position on seat, to ensure the detection to electric arc/spark spectrum without dead angle.Each fiber spectrometer detector 3 leads to
Cross an optical fiber 4 to be connected with fiber spectrometer 6.Fiber spectrometer detector 3 is for entering to the emission spectrum of electric arc/spark
Row detection, being sent to fiber spectrometer 6 via optical fiber 4 carries out spectrum analysis to optical signal, then transfers data to meter
Calculation machine, calculates electric arc for double spectroscopic temperature measurement methods or spark temperature provides spectroscopic data.The spectral wavelength model of fiber spectrometer analysis
It is 200～2500nm to enclose.
When radio frequency fuel oil hazard detection is carried out, conduit 8 is injected to nitrogen injection in fuel tank 9 by nitrogen, one is to prevent
Fire the generation of danger；Two temperature for being because the primary ions linear light spectrometry electric arc/spark using nitrogen, the nitrogen of injection
Gas is the breakdown gas for producing electric arc/spark, therefore nitrogen provides necessary condition for detection.Computer is tied from spectrum analysis
The nitrogen primary ions linear light spectrum information specified is filtered out in fruit, the temperature of electric arc/spark is calculated using double spectroscopic methodologies.
Simulation lubricator 5 is used to simulate nozzle during true refueling operation, short form test condition and setting.
When radio frequency fuel oil hazard detection is carried out, as shown in Fig. 2 the device of the present invention is installed first, specifically：By optical fiber
Spectrometer detectors 3 and fibre optic endoscopes camera lens 2 are arranged on test device pedestal 1, then that test device pedestal 1 is solid
It is scheduled on simulation lubricator 5 or true nozzle, fiber spectrometer detector 3 and fiber spectrometer 6 is connected using optical fiber 4
Pick up and, fibre optic endoscopes camera lens 2 and testing computer are coupled together using optical fiber 4, nitrogen injection is led
Pipe 8 is fixed in nitrogen hand-hole 7.After completing the installment work of test device, which is checked, it is to avoid electric leakage or its other party
Formula threatens to fuel container.Then according to test requirements document is tested, the electric discharge phenomena in monitoring record test.
When generation electric arc/spark is detected by fibre optic endoscopes camera lens 2, fiber spectrometer detector 3 will inspection
The optical signal transmission for measuring carries out spectrum analysis to optical signal by fiber spectrometer 6 to fiber spectrometer 6, and computer is to spectrum
Nitrogen primary ions linear light spectrum information in analysis result is extracted, and then calculates electric arc/spark using double spectroscopic methodologies
Temperature T, the temperature threshold T that temperature T of electric arc/spark is endangered with radio frequency fuel oilmIt is compared, judges whether to produce radio frequency
Fuel oil endangers.
Spark ignition is primarily due to high temperature spark raises neighbouring mixing combustibles temperature, so that reaching what is caught fire
Critical condition and be ignited.Many experiments show, in the case where interelectrode fuel performance, pressure, temperature are certain, only when
Discharge energy E is more than spark ignition least energy EminWhen can just form initial flame.
In formula：TmIt is mixed gas theoretical temperature combustion, T∞It is environment temperature, K1It is correction factor, rminIt is that minimum is caught fire
Radius,It is thermal capacitance, ρ∞It is the density of mixed gas.
The present invention proposes using the temperature of electric arc/spark as criterion, goes out radio frequency according to the calorific value calculation of fuel first and fire
The temperature threshold T of oil harmm；Then the spectral information of electric arc/spark is collected, nitrogen primary ions linear light therein is filtered out
Spectrum information, calculates temperature T of electric arc/spark using double spectroscopic methodologies；Finally, judge whether temperature T of electric arc/spark reaches generation
The temperature threshold T of radio frequency fuel oil harmmIf not up to there is the temperature threshold of radio frequency fuel oil harm in temperature T of electric arc/spark
Tm, the harm of radio frequency fuel oil would not occur, if temperature T of electric arc/spark meets or exceeds the temperature that the harm of radio frequency fuel oil occurs
Degree threshold value Tm, its energy will be more than or equal to Emin, the harm of radio frequency fuel oil will occur.
The temperature threshold T of radio frequency fuel oil harmmAcquisition methods be：Assume two theoretical temperature combustion t1And t2, according under
Face formula determines corresponding lower calorific value of fuel Q11And Q12；
Q1It is lower calorific value of fuel, ViIt is the volume of i-th kind of product,It is the average specific heat capacity at constant pressure of i-th kind of product.It is known
Q1When, respectively by T=t1And T=t2Formula above is substituted into, determination of tabling look-up is correspondingObtain corresponding lower calorific value of fuel Q11With
Q12；
Then temperature threshold T is obtained using interpolation methodm,
In the present invention, fiber spectrometer carries out spectrum analysis to the optical signal that fiber spectrometer detector is transmitted, and filters out finger
Fixed nitrogen primary ions linear light spectrum information, if selecting wavelength for λ1Spectrum line and wavelength be λ2Spectrum line, using double light
Spectrometry calculates temperature T of electric arc/spark.Electric arc/spark temperature T can be determined according to formula below：
Wherein,WithRespectively wavelength is λ1And λ2The intensity of spectrum line, A1 +And A2 +Respectively wavelength X1And λ2Light
The transition probability of spectral line, g1 +And g2 +Respectively wavelength X1And λ2The statistical weight of spectrum line excitation state, E1 +And E2 +Respectively wavelength
λ1And λ2The energy level (excitation potential) of spectrum line excitation state.Wavelength X1And λ2Can be set by user.
Claims (7)
1. a kind of radio frequency fuel oil hazard detection device, judges whether the electric arc/spark temperature of radio frequency fuel oil harm for measurement
Degree and image information, it is characterised in that：Described radio frequency fuel oil hazard detection device is included in test device pedestal, optical fiber
Sight glass camera lens, fiber spectrometer detector, optical fiber, fiber spectrometer and nitrogen injection conduit；
Fiber spectrometer detector and fibre optic endoscopes camera lens are installed on described test device pedestal, and are provided with nitrogen
Hand-hole, test device pedestal are fixed on simulation lubricator or actual nozzle；Described fibre optic endoscopes camera lens is adopted
Image digitized fiber-optic signal is converted in oil sump tank, is sent to computer via optical fiber, to detect electricity in fuel tank
The generation of arc/spark；The optical signal of described fiber spectrometer detector detected arc/spark, and transmit via optical fiber
Spectrum analysis is carried out to optical signal to fiber spectrometer, Spectroscopic analysis results are sent to into computer；Described nitrogen injection is led
Pipe is by the nitrogen hand-hole on test device pedestal to nitrogen injection in fuel tank；Described computer, from Spectroscopic analysis results
In filter out the nitrogen primary ions linear light spectrum information specified, calculate the temperature of electric arc/sparks using double spectroscopic methodologies.
2. radio frequency fuel oil hazard detection device according to claim 1, it is characterised in that described test device pedestal,
It is additionally operable to block the light energy outside fuel tank, the optical signal for preventing the outer optical signal interference arc/spark of fuel tank from producing.
3. radio frequency fuel oil hazard detection device according to claim 1, it is characterised in that described test device pedestal,
Its guarantee to exist between the oil filling pipe of lubricator and inner wall of oil tank after installing with it is actually used when identical discharging gap.
4. radio frequency fuel oil hazard detection device according to claim 1, it is characterised in that described fibre optic endoscopes
Camera lens has three, in the symmetric position on test device pedestal.
5. the radio frequency fuel oil hazard detection device according to claim 1 or 4, it is characterised in that in described optical fiber
The spectral wavelength ranges of sight glass shot detection are 350～1100nm.
6. radio frequency fuel oil hazard detection device according to claim 1, it is characterised in that described fiber spectrometer detection
Device has four, in the symmetric position on test device pedestal.
7. radio frequency fuel oil hazard detection device according to claim 1, it is characterised in that described fiber spectrometer analysis
Spectral wavelength ranges be 200～2500nm.
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| CN201510052026.5A CN104596945B (en) | 2015-02-02 | 2015-02-02 | Radio frequency fuel oil hazard detection device |
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| CN104596945B true CN104596945B (en) | 2017-04-05 |
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