CN108760640A - A kind of moving source exhaust emission gas rapid detection system and detection method - Google Patents
A kind of moving source exhaust emission gas rapid detection system and detection method Download PDFInfo
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- CN108760640A CN108760640A CN201810934910.5A CN201810934910A CN108760640A CN 108760640 A CN108760640 A CN 108760640A CN 201810934910 A CN201810934910 A CN 201810934910A CN 108760640 A CN108760640 A CN 108760640A
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Abstract
The invention discloses a kind of moving source exhaust emission gas rapid detection system and detection methods,Described fore filter one end connects instrument air inlet as the input port for waiting for test sample gas,The other end of the fore filter is connected to the air inlet of accurate filter by tracheae,The gas outlet of the accurate filter is connected to the air inlet of constant temperature gas absorption cell by tracheae,The gas outlet of the constant temperature gas absorption cell is connected to by tracheae in a threeway,Other two channel of the threeway is connected to the induction end of the air inlet and baroceptor of vacuum pump by tracheae respectively,The main control unit respectively with spectrometer,Vacuum pump connects realization control and data acquisition with baroceptor,The multi wave length illuminating source setting is used for sending out measurement light beam in constant temperature gas absorption cell side,The spectrometer, which is arranged to be used for acquiring in the constant temperature gas absorption cell other side, measures multi wave length illuminating source to the spectroscopic data that is vented in constant temperature gas absorption cell.
Description
Technical field
The present invention relates to exhaust pollution gas detection technology fields, and in particular to a kind of moving source exhaust emission gas is quick
Detecting system and detection method.
Background technology
In recent years, moving source pollution problem in China's is more prominent, wherein by diesel engine provide power motor vehicle and
The nitrogen oxides of non-rice habitats engineering machinery discharge accounts for 70% or more of city moving source total emission volumn, and diesel truck emissions are exceeded existing
As universal, based on existing exhaust gas from diesel vehicle detection device is mainly detected with smoke opacity, for diesel engine exhaust dirt
The equipment for contaminating analyte detection is seldom, and is detected with electrochemical method, the disadvantage is that service life is short, reaction speed is slow, inspection
It is of less types to survey polluted gas.
Invention content
The purpose of the present invention is to overcome the shortage of prior art, and provides a kind of moving source exhaust emission gas and quickly detects
System and detection method, solve existing exhaust gas from diesel vehicle detection device and mainly detected with smoke opacity based on, for diesel oil
The equipment of Engine Emissions analyte detection is seldom, and is detected with electrochemical method, the disadvantage is that service life is short, instead
Answer speed slow, detection polluted gas problem of less types.
The present invention is achieved through the following technical solutions：
A kind of moving source exhaust emission gas rapid detection system, including fore filter, accurate filter, constant temperature gas
Absorption cell, multi wave length illuminating source, spectrometer, vacuum pump, baroceptor and main control unit, described fore filter one end connect instrument
Device air inlet is connected to accurate filter as the input port for waiting for test sample gas, the other end of the fore filter by tracheae
Air inlet, the gas outlet of the accurate filter is connected to the air inlet of constant temperature gas absorption cell, the constant temperature by tracheae
The gas outlet of gas absorption cell is connected to by tracheae in a threeway, other two channel of the threeway passes through tracheae respectively
It is connected to the air inlet of vacuum pump and the induction end of baroceptor, the main control unit is gentle with spectrometer, vacuum pump respectively
Pressure sensor connection realizes that control and data acquisition, the multi wave length illuminating source setting are used for sending out in constant temperature gas absorption cell side
Measurement light beam, the spectrometer setting is used for acquiring in the constant temperature gas absorption cell other side measures multi wave length illuminating source to constant temperature gas
The spectroscopic data being vented in body absorption cell.
Baroceptor is used for monitoring the pressure of Measurement channel, and pressure value is sent to main control unit.Main control unit is used
It realizes Control & data acquisition, is made of embedded main board and control circuit board, embedded main board connects touch screen, spectrum
Instrument, mini-printer and control circuit board, control circuit board connect constant temperature gas absorption cell, vacuum pump and baroceptor.It touches
It touches screen not only to input as the control of instrument, but also the display as Instrument working state and measurement result exports.Mini-printer is used
To print measurement result.
Further, the vacuum pump is equipped with exhaust outlet, and the gas being tested is discharged by exhaust outlet.
Further, further include having touch screen, the touch screen is connected with main control unit control, and touch screen is both used as instrument
Control input, and as the display of Instrument working state and measurement result export.
Further, further include having mini-printer, mini-printer beats measurement result with main control unit control connection
It prints off and.
Further, the main control unit is made of embedded main board and control circuit board, and wherein embedded main board connects
Touch screen, spectrometer, mini-printer and control circuit board, the control circuit board connection constant temperature gas absorption cell, vacuum pump
And baroceptor.
Further, the constant temperature gas absorption cell includes absorption cell cavity, collimation lens, condenser lens, and temp auto-controlled adds
Hot device, insulating layer and temperature sensor, the Automatic Control Temperature Heater is using the ptc heater of 24V/110 DEG C of constant temperature, automatic control
Warm heater is close on absorption cell cavity, and temperature sensor is close to install on absorption cell cavity, and the absorption cell cavity, temperature pass
Sensor and Automatic Control Temperature Heater outer layer covers insulating layer reduce distributing for heat, the measurement that collimation lens emits multi wave length illuminating source
Beam collimation passes through the Measurement channel of absorption cell inside cavity at directional light, after then line focus lens are assembled, injects spectrometer.
Further, the exit portal of the multi wave length illuminating source, the collimation lens of constant temperature gas absorption cell and condenser lens, light
The entrance port of spectrometer 4 needs installation and debugging to central coaxial.
Further, the multi wave length illuminating source is used for sending out measurement light beam, and it is dirty that wave-length coverage should cover all targets
The corresponding at least one characteristic absorption wavelength of gas is contaminated, multi wave length illuminating source can be single photophore, and multi wave length illuminating source also can be by more
A photophore is composed.
The present invention is realized by following another technical solutions：
A kind of moving source exhaust emission gas rapid detection method, including step：
Start to preheat after booting, main control unit obtains the temperature value of constant temperature gas absorption cell from temperature sensor, works as temperature
Value enters ready state when reaching 100 DEG C or more, waits to be measured；
After instrument enters ready state, when preparing to measure sample gas, corresponding operating, master control are carried out on the touchscreen
Unit starts measurement after receiving order, and control vacuum pump is powered on, and sample gas is persistently pumped into gas circuit, and sample gas passes through preposition mistake
Large particle has been filtered out after filter, then by having filtered out small particle after accurate filter, prevents from entering constant temperature gas absorption cell
Under test gas pollution absorption cell cavity, collimation lens and condenser lens, the measuring beam that multi wave length illuminating source is sent out pass through constant temperature
After under test gas in gas absorption cell Measurement channel, inject in spectrometer, spectrometer sends out collected spectroscopic data information
Main control unit is given, main control unit carries out analysis calculating, the concentration of inverting exhaust to the data of spectrum medium wavelength position respectively
Value, measurement result are automatically recorded in memory, while the working condition of meeting real-time display all parts and survey on touch screen
Measure result information；
Start mini-printer if it need to print to print measurement result.
Further, for main control unit by acquiring the data of baroceptor, real-time judge airway blockage degree works as measurement
When channel pressure is declined in limits, main control unit is by the measurement according to the situation of change of pressure value to polluted gas concentration
As a result it is accordingly compensated, instrument still works normally.When Measurement channel pressure decrease beyond limit value, main control unit will be automatic
Vacuum pump is closed, pumping, and display reminding information on the touchscreen are stopped, needing to check fore filter and secondary filter at this time
Device determines that replace wherein 1 or 2 replaces simultaneously.
Compared with prior art, the present invention having the following advantages and advantages：
A kind of moving source exhaust emission gas rapid detection system of the present invention and detection method, using Spectrum Absorption Principle reality
The detection of existing diesel engine exhaust pollutant, has service life long, measuring speed is fast, can measure the spy of multiple gases simultaneously
Point.
Constant temperature gas absorption cell is by absorption cell cavity, lens, Automatic Control Temperature Heater, temperature sensor, insulating layer composition.Its
Bulk temperature is maintained at 100 DEG C or more, can prevent from impacting measurement due to condensation vapor.
Spectrometer is used for acquiring measure spectrum data, and it is corresponding that spectrographic detection range should cover all target stains gases
At least one characteristic absorption wavelength, and these wavelength are also within the luminescent spectrum range of multi wave length illuminating source.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is a kind of structural representation of moving source exhaust emission gas rapid detection system described in the embodiment of the present invention
Figure；
Fig. 2 is the constant temperature gas absorption cell structural schematic diagram described in the embodiment of the present invention；
Fig. 3 is the multi wave length illuminating source structural schematic diagram described in the embodiment of the present invention；
Fig. 4 is the main control unit structural schematic diagram described in the embodiment of the present invention；
Fig. 5 is the circuit theory schematic diagram of control circuit board of the present invention；
Label and corresponding parts title in attached drawing：
1- fore filters, 2- accurate filters, 3- constant temperature gas absorption cells, 31- absorption cell cavitys, 32- collimation lenses,
33- condenser lenses, 34- Automatic Control Temperature Heaters, 35- insulating layers, 36- temperature sensors, 4- multi wave length illuminating sources, 5- spectrometers, 6-
Vacuum pump, 7- baroceptors, 8- main control units, 81- embedded main boards, 82- control circuit boards, 9- touch screens, 10- is miniature to be beaten
Print machine, 11- instrument air inlets, 12- threeways, 13- exhaust outlets.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
As shown in Figs 1-4, a kind of moving source exhaust emission gas rapid detection system of the present invention, including fore filter 1,
Accurate filter 2, constant temperature gas absorption cell 3, multi wave length illuminating source 5, spectrometer 4, vacuum pump 6, baroceptor 7 and main control unit
8,1 one end of the fore filter connects instrument air inlet 11 as the input port for waiting for test sample gas, the fore filter 1 it is another
Outer one end is connected to the air inlet of accurate filter 2 by tracheae, and fore filter is for filtering out larger particles in sample gas.
The gas outlet of the accurate filter 2 is connected to the air inlet of constant temperature gas absorption cell 3 by tracheae, and accurate filter is used for will
Finely ground particles filter out in sample gas, and filtering gap is not more than 5 microns.The gas outlet of the constant temperature gas absorption cell 3 passes through tracheae
It is connected in a threeway 12, constant temperature gas absorption cell is protected by absorption cell cavity, lens, Automatic Control Temperature Heater, temperature sensor
Warm layer composition.Its bulk temperature is maintained at 100 DEG C or more, can prevent from impacting measurement due to condensation vapor.The threeway
12 other two channel is connected to the induction end of the air inlet and baroceptor 7 of vacuum pump 6, vacuum pump by tracheae respectively
For sample aspiration is entered Measurement channel.The main control unit 8 connect reality with spectrometer 4, vacuum pump 6 and baroceptor 7 respectively
Now control and data acquisition, the setting of the multi wave length illuminating source 5 are used for sending out measurement light beam in 3 side of constant temperature gas absorption cell,
Multi wave length illuminating source is used for sending out measurement light beam, and wave-length coverage should cover the corresponding at least one spy of all target stains gases
Absorbing wavelength is levied, this light source can be single photophore, can also be composed of multiple photophores.The spectrometer 4 is arranged
It is used for acquiring the spectrum number for measuring multi wave length illuminating source 5 to exhaust in constant temperature gas absorption cell 3 in 3 other side of constant temperature gas absorption cell
According to.Spectrometer is used for acquiring measure spectrum data, and it is corresponding at least that spectrographic detection range should cover all target stains gases
One characteristic absorption wavelength, and these wavelength are also within the luminescent spectrum range of multi wave length illuminating source.
Baroceptor is used for monitoring the pressure of Measurement channel, and pressure value is sent to main control unit.Main control unit is used
It realizes Control & data acquisition, is made of embedded main board and control circuit board, embedded main board connects touch screen, spectrum
Instrument, mini-printer and control circuit board, control circuit board connect constant temperature gas absorption cell, vacuum pump and baroceptor.It touches
It touches screen not only to input as the control of instrument, but also the display as Instrument working state and measurement result exports.Mini-printer is used
To print measurement result.
Vacuum pump 6 is equipped with exhaust outlet 13, and the gas being tested is discharged by exhaust outlet 13.Further include having touch screen
9, the touch screen 9 is connected with the control of main control unit 8, and touch screen 9 is not only inputted as the control of instrument, but also as instrument work shape
The display of state and measurement result exports.Further include having mini-printer 10, mini-printer 10 will with the control of main control unit 8 connection
Measurement result prints.
It states main control unit 8 to be made of embedded main board 81 and control circuit board 82, the wherein connection of embedded main board 81 touches
Screen 9, spectrometer 4, mini-printer 10 and control circuit board 82, the control circuit board 82 connect constant temperature gas absorption cell 3, true
Sky pump 6 and baroceptor 7.Wherein：The model MIO-5350 of embedded main board 81, mainly comprising 2 USB interfaces, 2
RS232 serial line interfaces, panel display interface etc..Wherein, panel display interface and one of USB interface are used for and touch
9 connection of screen；Another USB interface is used for and spectrometer 4 connects；One of RS232 serial line interfaces are used for and microprinting
Machine 10 connects；Another RS232 interface is used for and control circuit board 82 connects.
The circuit theory schematic diagram 5 of control circuit board 82 is as follows：Wherein, communication unit is connect with embedded main board 81；Gas
Pump control unit is connect with vacuum pump 6；Air pressure acquisition unit is connect with baroceptor 7；Temperature control unit and constant temperature gas
Absorption cell 3 connects.
The constant temperature gas absorption cell 3 includes absorption cell cavity 31, collimation lens 32, condenser lens 33, temp auto-controlled heating
Device 34, insulating layer 35 and temperature sensor 36, the Automatic Control Temperature Heater 34 are heated using the PTC of 24V/110 DEG C of constant temperature
Device, Automatic Control Temperature Heater 34 are close on absorption cell cavity 31, and temperature sensor 36 is close to install on absorption cell cavity 31, the suction
Receives pond cavity 31, temperature sensor 36 and 34 outer layer covers insulating layer 35 of Automatic Control Temperature Heater reduce distributing for heat, and collimation is saturating
The measuring beam that multi wave length illuminating source 5 emits is collimated into Measurement channel of the directional light inside absorption cell cavity 31 by mirror 32, so
After being assembled by condenser lens 33, spectrometer 4 is injected.Absorption cell cavity is made of stainless steel.
The exit portal of the multi wave length illuminating source 5, the collimation lens 32 of constant temperature gas absorption cell 3 and condenser lens 33, spectrum
The entrance port of instrument 4 needs installation and debugging to central coaxial.
The multi wave length illuminating source 5 is used for sending out measurement light beam, and wave-length coverage should cover all target stains gases pair
At least one characteristic absorption wavelength answered, multi wave length illuminating source 5 can be single photophore, and multi wave length illuminating source 5 can also be shone by multiple
Device is composed.
As shown in Fig. 2, constant temperature gas absorption cell 3 is by absorption cell cavity 31, collimation lens 32, condenser lens 33, temp auto-controlled
Heater 34, temperature sensor 36, insulating layer 35 form.Automatic Control Temperature Heater 34 adds using the PTC of 24V/110 DEG C of constant temperature
Hot device is close on absorption cell cavity 31, can be multiple in different location installation as needed, and temperature sensor 36 is close to absorb cell cavity
It is installed on body 31,34 outer layer covers insulating layer 35 of absorption cell cavity 31, temperature sensor 36 and Automatic Control Temperature Heater can be reduced
Heat distributes, and the absorption cell after handling in this way, internal temperature is positively retained at 100 DEG C or more, and steam can be effectively prevent solidifying
Knot.The measuring beam that multi wave length illuminating source 5 emits is collimated into survey of the directional light inside absorption cell cavity 31 by collimation lens 32
Channel is measured, after then line focus lens 33 are assembled, injects spectrometer 4.
Multi wave length illuminating source 5 is used for sending out measurement light beam, and it is corresponding that wave-length coverage should cover all target stains gases
At least one characteristic absorption wavelength, the present embodiment, which measures target stains gas, has NO, NO2, NH3 and SO2, NO to measure corresponding spy
Sign absorbing wavelength is 226nm, and it is 204.5nm that NH3, which measures corresponding characteristic absorption wavelength, and SO2 measures corresponding characteristic absorption wave
It is 439nm that a length of 217nm, NO2, which measure corresponding characteristic absorption wavelength,.Multi wave length illuminating source 5 can be single photophore, such as xenon
Lamp, emission wavelength range meet from 190nm to 1100nm and measure needs；Multi wave length illuminating source 5 can also be by multiple photophore groups
It closes, as shown in figure 3, the light that deuterium lamp 51 and violet light emitting diodes 52 are sent out, the group after eyeglass 53 transmits and reflects respectively
Synthesize light beam, 51 emission wavelength range of deuterium lamp from 160nm to 400nm, 52 emission wavelength range of violet light emitting diodes from
420nm to 460nm, the light source after combination, which meets, measures needs.In addition, the present embodiment has only used these target stains gases
A characteristic absorption wavelength be not described one by one if similarly may be implemented to measure with other characteristic absorption wavelengths, equally
The detection of other gases can be also carried out in available wave-length coverage, the present embodiment only measures wherein 4 kinds of gases.
Spectrometer 4 is used for acquiring measure spectrum data, and spectrographic detection range should cover all target stains gases and correspond to
At least one characteristic absorption wavelength, and these wavelength are also within the luminescent spectrum range of multi wave length illuminating source, the present embodiment
Characteristic absorption wavelength used is 204.5nm, 217nm, 226nm and 439nm, and the spectrometer of selection is specially Ocean Optics
STS-UV types, detect wave-length coverage 190nm to 650nm, completely cover above-mentioned 4 wavelength, naturally it is also possible to select it
He carrys out complete design by the spectrometer of other models of producer.
Main control unit 8 acquires the measure spectrum data that spectrometer 4 is sent, and it is dirty to calculate contained target in sample gas by analysis
Contaminate gas concentration；The Measurement channel pressure data that acquisition baroceptor 7 is sent, compensates the result of calculation of gas concentration
Correction, while when pressure value is less than some limit value, blocking alarm or other exception responses can be generated；By Instrument working state
And measurement result is output to the display of touch screen 9, and measurement result can be printed by mini-printer 10 when needing.
A kind of moving source exhaust emission gas rapid detection system of the present invention, the specific work process of instrument are described as follows：
Starting to preheat after booting, main control unit 8 obtains the temperature value of constant temperature gas absorption cell 3 from temperature sensor 36, when
Temperature value enters ready state when reaching 100 DEG C or more, waits to be measured；
After instrument enters ready state, when preparing to measure sample gas, corresponding operating is carried out on touch screen 9, it is main
Control unit 8 starts measurement after receiving order, and control vacuum pump 6 is powered on, and sample gas is persistently pumped into gas circuit, before sample gas passes through
Large particle has been filtered out after setting filter 1, then by having filtered out small particle after accurate filter 2, has prevented from entering constant temperature gas
Under test gas pollution absorption cell cavity 31, collimation lens 32 and the condenser lens 33 of absorption cell 3, the survey that multi wave length illuminating source 5 is sent out
After measuring the under test gas that light beam passes through in 3 Measurement channel of constant temperature gas absorption cell, inject in spectrometer 4, spectrometer 4 will collect
Spectroscopic data information be sent to main control unit 8, main control unit 8 carries out analysis meter to the data of spectrum medium wavelength position respectively
It calculates, the concentration value of inverting exhaust, measurement result is automatically recorded in memory, while meeting real-time display is each on touch screen 9
The working condition and measurement result information of a component；
Start mini-printer 10 if it need to print to print measurement result.
Main control unit 8 passes through the data of acquisition baroceptor 7, real-time judge airway blockage degree, when Measurement channel pressure
When power is declined in limits, main control unit 8 is by the measurement result according to the situation of change of pressure value to polluted gas concentration
It is accordingly compensated, instrument still works normally.When Measurement channel pressure decrease beyond limit value, main control unit 8 will close automatically
Vacuum pump 6 is closed, pumping, and the display reminding information on touch screen 9 are stopped, needing to check fore filter 1 and secondary filter at this time
Device 2 determines that replace wherein 1 or 2 replaces simultaneously.
Embodiment 2
As shown in Figs 1-4, a kind of moving source exhaust emission gas rapid detection method of the present invention, including step：
Start to preheat after instrument booting, main control unit 8 obtains the temperature of constant temperature gas absorption cell 3 from temperature sensor 36
Value, enters ready state when temperature value reaches 100 DEG C or more, waits to be measured.If after preheating for a long time, constant temperature gas absorption cell
3 temperature is always below 100 DEG C, then can on touch screen 9 display reminding information.
After instrument enters ready state, when preparing to measure sample gas, corresponding operating is carried out on touch screen 9, it is main
Control unit 8 starts measurement after receiving order, and control vacuum pump 6 is powered on, and sample gas is persistently pumped into gas circuit, before sample gas passes through
Larger particles are filtered out after setting filter 1, then by having filtered out finely ground particles after accurate filter 2, has entered constant temperature in this way
The under test gas of gas absorption cell 3 will not just pollute absorption cell cavity 31, collimation lens 32 and condenser lens 33, multi wave length illuminating source
After 5 measuring beams sent out pass through the under test gas in 3 Measurement channel of constant temperature gas absorption cell, inject in spectrometer 4, spectrometer
Collected spectroscopic data information is sent to main control unit 8 by 4, main control unit 8 respectively to 204.5nm, 217nm in spectrum,
The data of 226nm and 439nm wavelength locations carry out analysis calculating, are finally inversed by the concentration value of NH3, SO2, NO and NO2, measurement result
It is automatically recorded in memory, while the letters such as working condition, measurement result of meeting real-time display all parts on touch screen 9
Breath.Start mini-printer 10 if it need to print to print measurement result.
Main control unit 8 passes through the data of acquisition baroceptor 7, real-time judge airway blockage degree, when Measurement channel pressure
When power is declined in limits, main control unit 8 is by the measurement result according to the situation of change of pressure value to polluted gas concentration
It is accordingly compensated, instrument still works normally.When Measurement channel pressure decrease beyond limit value, main control unit 8 will close automatically
Vacuum pump 6 is closed, pumping, and the display reminding information on touch screen 9 are stopped, needing to check fore filter 1 and secondary filter at this time
Device 2 determines that replace wherein 1 or 2 replaces simultaneously.
Fore filter is for filtering out larger particles in sample gas.Accurate filter is used for finely ground particles in sample gas
It filters out, filtering gap is not more than 5 microns.Constant temperature gas absorption cell is passed by absorption cell cavity, lens, Automatic Control Temperature Heater, temperature
Sensor, insulating layer composition.Its bulk temperature is maintained at 100 DEG C or more, can prevent from impacting measurement due to condensation vapor.It is more
Wavelength light source is used for sending out measurement light beam, and wave-length coverage should cover the corresponding at least one feature of all target stains gases
Absorbing wavelength, this light source can be single photophores, can also be composed of multiple photophores.Spectrometer is used for acquiring measurement
Spectroscopic data, spectrographic detection range should cover the corresponding at least one characteristic absorption wavelength of all target stains gases, and
These wavelength are also within the luminescent spectrum range of multi wave length illuminating source.Vacuum pump is used for sample aspiration entering Measurement channel.Air pressure transmission
Sensor is used for monitoring the pressure of Measurement channel, and pressure value is sent to main control unit.Main control unit is used for realizing control sum number
According to acquisition, be made of embedded main board and control circuit board, embedded main board connect touch screen, spectrometer, mini-printer and
Control circuit board, control circuit board connect constant temperature gas absorption cell, vacuum pump and baroceptor.Touch screen is both as instrument
Control input, and exported as the display of Instrument working state and measurement result.Mini-printer is used for printing measurement result.
A kind of moving source exhaust emission gas rapid detection method of the present invention realizes diesel engine using Spectrum Absorption Principle
The detection of machine exhaust contaminant has service life long, and measuring speed is fast, the characteristics of can measuring multiple gases simultaneously.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of moving source exhaust emission gas rapid detection system, including fore filter (1), accurate filter (2), constant temperature
Gas absorption cell (3), multi wave length illuminating source (5), spectrometer (4), vacuum pump (6), baroceptor (7) and main control unit (8),
It is characterized in that：Fore filter (1) one end connection instrument air inlet (11) is described preposition as the input port for waiting for test sample gas
The other end of filter (1) is connected to the air inlet of accurate filter (2) by tracheae, and accurate filter (2) go out
Gas port is connected to the air inlet of constant temperature gas absorption cell (3) by tracheae, and the gas outlet of the constant temperature gas absorption cell (3) passes through
Tracheae is connected on a threeway (12), other two channel of the threeway (12) is connected to vacuum pump by tracheae respectively
(6) induction end of air inlet and baroceptor (7), the main control unit (8) respectively with spectrometer (4), vacuum pump (6) and
Baroceptor (7) connection realizes that control and data acquisition, the multi wave length illuminating source (5) are arranged in constant temperature gas absorption cell (3)
Side is used for sending out measurement light beam, and spectrometer (4) setting is used for acquiring measurement in constant temperature gas absorption cell (3) other side
Spectroscopic data of the multi wave length illuminating source (5) to exhaust in constant temperature gas absorption cell (3).
2. a kind of moving source exhaust emission gas rapid detection system according to claim 1, which is characterized in that described true
Sky pump (6) is equipped with exhaust outlet (13), and the gas being tested is discharged by exhaust outlet (13).
3. a kind of moving source exhaust emission gas rapid detection system according to claim 1, which is characterized in that further include
There are touch screen (9), the touch screen (9) to be connected with main control unit (8) control, touch screen (9) was both inputted as the control of instrument,
The display as Instrument working state and measurement result exports again.
4. a kind of moving source exhaust emission gas rapid detection system according to claim 3, which is characterized in that further include
There are mini-printer (10), mini-printer (10) to print measurement result with main control unit (8) control connection.
5. a kind of moving source exhaust emission gas rapid detection system according to claim 4, which is characterized in that the master
Control unit (8) is made of embedded main board (81) and control circuit board (82), and wherein embedded main board (81) connects touch screen
(9), spectrometer (4), mini-printer (10) and control circuit board (82), control circuit board (82) the connection constant temperature gas are inhaled
Receives pond (3), vacuum pump (6) and baroceptor (7).
6. a kind of moving source exhaust emission gas rapid detection system according to claim 1, which is characterized in that the perseverance
Warm gas absorption cell (3) includes absorption cell cavity (31), collimation lens (32), condenser lens (33), Automatic Control Temperature Heater (34),
Insulating layer (35) and temperature sensor (36), the Automatic Control Temperature Heater (34) are heated using the PTC of 24V/110 DEG C of constant temperature
Device, Automatic Control Temperature Heater (34) are close on absorption cell cavity (31), and temperature sensor (36) is close to pacify on absorption cell cavity (31)
Dress, the absorption cell cavity (31), temperature sensor (36) and Automatic Control Temperature Heater (34) outer layer covers insulating layer (35) are reduced
Heat distributes, and the measuring beam that multi wave length illuminating source (5) emits is collimated into directional light and passed through by collimation lens (32) absorbs cell cavity
The internal Measurement channel of body (31) after then line focus lens (33) are assembled, injects spectrometer (4).
7. a kind of moving source exhaust emission gas rapid detection system according to claim 6, which is characterized in that described more
The exit portal of wavelength light source (5), the collimation lens (32) of constant temperature gas absorption cell (3) and condenser lens (33), spectrometer (4)
Entrance port needs installation and debugging to central coaxial.
8. according to a kind of moving source exhaust emission gas rapid detection system of claim 1-7 any one of them, feature exists
In the multi wave length illuminating source (5) is used for sending out measurement light beam, and it is corresponding that wave-length coverage should cover all target stains gases
At least one characteristic absorption wavelength, multi wave length illuminating source (5) can be single photophore, and multi wave length illuminating source (5) can also be shone by multiple
Device is composed.
9. a kind of moving source exhaust emission gas rapid detection method, which is characterized in that including step：
Starting to preheat after booting, main control unit (8) obtains the temperature value of constant temperature gas absorption cell (3) from temperature sensor (36),
Enter ready state when temperature value reaches 100 DEG C or more, waits to be measured；
After instrument enters ready state, when preparing to measure sample gas, corresponding operating, master control are carried out on touch screen (9)
Unit (8) starts measurement after receiving order, and control vacuum pump (6) is powered on, and sample gas is persistently pumped into gas circuit, and sample gas passes through
Large particle has been filtered out after fore filter (1), then by having filtered out small particle after accurate filter (2), prevents from entering perseverance
Under test gas pollution absorption cell cavity (31), collimation lens (32) and the condenser lens (33) of warm gas absorption cell (3), multi-wavelength
After the measuring beam that light source (5) is sent out passes through the under test gas in constant temperature gas absorption cell (3) Measurement channel, spectrometer is injected
(4) in, collected spectroscopic data information is sent to main control unit (8) by spectrometer (4), and main control unit (8) is respectively to spectrum
The data of medium wavelength position carry out analysis calculating, the concentration value of inverting exhaust, and measurement result is automatically recorded in memory,
The working condition and measurement result information of real-time display all parts are understood on touch screen (9) simultaneously；
Start mini-printer (10) if it need to print to print measurement result.
10. a kind of moving source exhaust emission gas rapid detection method according to claim 9, it is characterised in that：
Main control unit (8) passes through the data of acquisition baroceptor (7), real-time judge airway blockage degree, when Measurement channel pressure
When power is declined in limits, main control unit (8) is by the measurement knot according to the situation of change of pressure value to polluted gas concentration
Fruit is accordingly compensated, and instrument still works normally.When Measurement channel pressure decrease beyond limit value, main control unit (8) will be certainly
It is dynamic to close vacuum pump (6), stop pumping, and the display reminding information on touch screen (9), needs to check 1 He of fore filter at this time
Accurate filter (2) determines that replace wherein 1 or 2 replaces simultaneously.
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