CN102053164B - System and method for automatically acquiring and analyzing trace gas - Google Patents

System and method for automatically acquiring and analyzing trace gas Download PDF

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Publication number
CN102053164B
CN102053164B CN2009102367156A CN200910236715A CN102053164B CN 102053164 B CN102053164 B CN 102053164B CN 2009102367156 A CN2009102367156 A CN 2009102367156A CN 200910236715 A CN200910236715 A CN 200910236715A CN 102053164 B CN102053164 B CN 102053164B
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gas
sampling
group
industrial control
way solenoid
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CN102053164A (en
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刘广仁
王迎红
王跃思
刘春岩
郑循华
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Institute of Atmospheric Physics of CAS
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Institute of Atmospheric Physics of CAS
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The invention relates to a system for automatically acquiring and analyzing a trace gas, which comprises a central control computer, an industrial control module group, a sampling part and a gas acquisition and analysis part, wherein the central control computer is used for writing programs by means of industrial control configuration software, generating and transmitting tank cover, gas passage and gas analysis commands, and receiving and storing analog signals which contain environmental meteorologic parameters and trace gas concentration data and are transmitted by the industrial control module group; the industrial control module group is respectively connected with the central control computer, the sampling part and the gas acquisition and analysis part; the gas acquisition and analysis part is connected with a pipeline of the sampling part; the industrial control module group is used for receiving industrial control commands, outputting multiple switching signals, and controlling the sampling part and the gas acquisition and analysis part to automatically carry out tank cover switching, gas acquisition and trace gas concentration analysis according to the programs; and the industrial control module group is used for processing current signals output by the sampling part and voltage signals output by the gas acquisition and analysis part and outputting the analog signals containing the environmental meteorologic parameters and the gas concentration data.

Description

The automatic collection of a kind of minimum gas and analytic system and method thereof
Technical field
The invention belongs to the measurement of soil and short vegetation (methane, carbon dioxide, nitrous oxide and nitrogen monoxide), relate to a kind of automatic collection and analytic system and method thereof of minimum gas.
Background technology
In the last hundred years, the Against Global Climate Changes that in atmosphere, carbon dioxide, methane and the rising of nitrous oxide isothermal chamber gas concentration are brought out has produced significant impact to world economy, society and ecologic environment etc., and sustainable development and the national security of various countries' economy in serious threat.Soil is the main source of minimum gas in atmosphere, especially relies on the rural activity of soil, especially atmosphere CH 4, CO 2, N 2The important sources of the minimum gas such as O and NO.These have the minimum gas of significant contribution in greenhouse effect and atmospheric chemistry process, their source estimation still has very large uncertainty.And the uncertainty of estimation is mainly from two aspect-observation datas and appraising model.With N 2O is example, global atmosphere N 2O has 70% to derive from the soil discharging, and wherein the discharge capacity of agricultural land soil accounts for only about half of.At present to global atmosphere N 2The estimation that converge in the O source is very uneven, and wherein emission source has been underestimated about 10% or 1.7Tg N yr -1, to agricultural land soil N 2The O discharge capacity be estimated as 0.6-14.8Tg N yr -1(IPCC, 2001) obviously have very large uncertainty.Produce large so probabilistic reason, be likely that the observation data overwhelming majority who relies on derives from low frequency and measures.Many studies show that, N 2Mostly the discharging of O is what pulsed occured, and each pulse type emission lasting time of peak is several hours to 1～3 day.Yet what at present the observation of the overwhelming majority adopted in the world is all the low frequency artificial observation of 3～10 days 1 time.Season or year N according to low-frequency like this observation data estimation 2The O discharge capacity is compared with the observation of 6 times every day, about 20～50% (Zheng et al., 2004) on the low side.As the N day by day that adopts the low frequency observation data to come verification model to calculate 2During the O discharge capacity, often meet difficulty, namely can't judgment models result of calculation whether correct, the unusual N of large (may be worth than usual high 1～3 order of magnitude) of amount of flux because batch (-type) observation is easy to some duration of test leakage short (usually only 1～2 day) 2O discharges the peak.Therefore, such low frequency observation data is not suitable for foundation and the checking of process model yet.Cause inevitably large error just because of low frequency observation, make N 2The research of O discharge process and environmental element controlling mechanism thereof is very difficult to carry out.Existing artificial observation technology can not original position be obtained the long-term simultaneous observation valid data of carbon nitrogen minimum gas, and existing in-situ observation technology only can be to CH 4And N 2These two kinds of compositions of O are measured, and need development original position automatic Observation technology badly to multiple carbon nitrogen component (CH 4, CO 2, N 2O, NO) observe simultaneously, with research terrestrial ecosystems-large gas carbon nitrogen minimum gas exchange process, rule and mechanism, obtain measured data and the parameter of verification model, and estimate ecosystem reduction of greenhouse gas discharge measure validity.
Summary of the invention
Can not accomplish satisfactorily simultaneously to CH because also there is no in the world a cover in-situ observation technical equipment 4, CO 2, N 2The clean exchange of these several important carbon nitrogen minimum gas of O and NO is carried out synchronously, the problem of METHOD FOR CONTINUOUS DETERMINATION, the object of the invention is to propose a kind of obtain precision high, accurately and reliably, automatic collection and analytic system and the method thereof of the minimum gas of the soil of continuous whole and short vegetation minimum gas discharging observational data, the labour intensity that reduces the observation personnel and workload.
For reaching described purpose, an aspect of of the present present invention, automatic collection and the analytic system of the minimum gas that provides, by the following technical solutions: comprise center-controlling computer, industrial control module group, sampling section and gas collection analysis section, wherein:
Center-controlling computer is industrial control computer, by the configuration software coding, generates and sends the industry control instruction of industry control instruction, gas circuit and gas collection analysis of the case lid of sampling section; Reception and storage industry control module group are sent the simulating signal that contains environment weather parameter and minimum gas concentration data;
the industrial control module group is connected with gas collection analysis section with center-controlling computer, sampling section respectively, the gas collecting analysis portion is connected with the pipeline of sampling section respectively, and the gas collecting analysis portion receives the pipeline of sampling section and carries gaseous sample, the industry control signal of sampling section case lid, gas circuit and gas collection analysis that the industrial control module winding receives that center-controlling computer generates, the output that receives sampling section have environment weather parameter voltage signal, the output of receiver gases collection analysis section has minimum gas concentration data voltage signal, wherein: the case lid of industrial control module group to sampling section, gas circuit and gas collection analysis industry control signal carry out the multi-way switch signal that voltage transitions generated and exported the case lid of controlling sampling section, the multi-way switch voltage signal that gas circuit assignment of logical signal and control gas collecting are analyzed, case lid that be used for to control sampling section opens and closes automatically according to the industry control signal, be used for controlling the gaseous sample that the gas collecting analysis portion carries the pipeline of sampling section according to the industry control signal gathers, be used for the gaseous sample concentration data of gas collecting analysis portion is carried out gas chromatography, NDIR (Non-Dispersive Infrared) and chemiluminescence analysis, the industrial control module group has environment weather parameter current signal to the output of sampling section to be processed, and generates and export the simulating signal that contains the environment weather parameter, the industrial control module group has the gas concentration data voltage signal to gas collecting analysis portion output to be processed, and generates and export to contain the gas concentration data analog signal.
For reaching described purpose, a second aspect of the present invention, automatic collection and the analytical approach of the minimum gas that provides, it is as follows that the method comprising the steps of:
Step S1: center-controlling computer is sent instruction by the industrial control configuration program, the gas collecting unit selection A group first sampling three-way solenoid valve of gas collecting analysis portion is opened, the first sampling channel that unlatching is comprised of A group the first sampling three-way solenoid valve and pipeline, aspiration pump are sent into the gas in A group first sampling box of correspondence the gas circuit assignment of logical device of gas collecting analysis portion; The gas circuit logic of gas circuit assignment of logical device is in pipeline-cleaning, Standard Gases sample introduction state, in sampling box gas by pipeline, capnograph, nitrogen-oxide analyzer,, matter flow controller at last from the drain outflow system of flowmeter; Simultaneously, calibrating gas enters greenhouse gases sample introduction instrument and gas chromatograph, and system completes pipeline-cleaning and first Standard Gases sample introduction;
Step S2: center-controlling computer is sent instruction by the industrial control configuration program, and the field control terminal of sampling section selects corresponding A group the first threeway Electromagnetic Control starting valve to open, and closes the first sampling box; Gas circuit assignment of logical device receiving center is controlled the instruction that computing machine sends, and the gas circuit logic transfers analytical gas sample NO and CO to 2In the first sampling box, gas enters carbon dioxide infrared spectrum analyser and nitrogen-oxide analyzer, by gas circuit assignment of logical device; Simultaneously, gas chromatograph is completed calibrating gas CH 4, CO 2And N 2The concentration analysis of O; System completes the first sampling box NO, the CO of gaseous sample for the first time 2Concentration analysis, first calibrating gas CH 4, CO 2And N 2The O concentration analysis;
Step S3: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, state transferred analytical gas sample CH to 4, CO 2And N 2O； In the first sampling box, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the first sampling box gaseous sample CH for the first time 4, CO 2And N 2The O concentration analysis;
Step S4: center-controlling computer is sent instruction by the industrial control configuration program, A group the first sampling three-way solenoid valve is closed in the gas collecting unit of gas collecting analysis portion, open B group the first sampling three-way solenoid valve, open the second sampling channel that is formed by B group the first sampling three-way solenoid valve and pipeline; The gas circuit logic of gas circuit assignment of logical device is in pipeline-cleaning, Standard Gases sample introduction state, and in the second sampling box, gas is by pipeline, capnograph, nitrogen-oxide analyzer,, the last outflow system of matter flow controller; Simultaneously, calibrating gas enters greenhouse gases sample introduction instrument and gas chromatograph, and system completes pipeline-cleaning and second Standard Gases sample introduction;
Step S5: center-controlling computer is sent instruction by the industrial control configuration program, and the field control terminal of sampling section selects corresponding B group the second threeway Electromagnetic Control starting valve to open, and closes the second sampling box; Gas circuit assignment of logical device receiving center is controlled the instruction that computing machine sends, and the gas circuit logic transfers analytical gas sample NO and CO to 2In the second sampling box, gas enters carbon dioxide infrared spectrum analyser and nitrogen-oxide analyzer, by the gas circuit logic controller; Simultaneously, gas chromatograph is completed calibrating gas CH 4, CO 2And N 2The concentration analysis of O; System completes the second sampling box NO, the CO of gaseous sample for the first time 2Concentration analysis, second calibrating gas CH 4, CO 2And N 2The O concentration analysis;
Step S6: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, the gas circuit logic transferred analytical gas sample CH to 4, CO 2And N 2O； In the second sampling box, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the second sampling box gaseous sample CH for the first time 4, CO 2And N 2The O concentration analysis;
Step S7: center-controlling computer is sent instruction by the industrial control configuration program, B group the first sampling three-way solenoid valve is closed in the gas collecting unit of gas collecting analysis portion, open C group the first sampling three-way solenoid valve, open the 3rd sampling channel that is formed by C group the first sampling three-way solenoid valve and pipeline; The gas circuit logic of gas circuit assignment of logical device is in pipeline-cleaning, Standard Gases sample introduction state, and in the 3rd sampling box, gas is by pipeline, capnograph, nitrogen-oxide analyzer,, the last outflow system of matter flow controller; Simultaneously, calibrating gas enters greenhouse gases sample introduction instrument and gas chromatograph, and system completes pipeline-cleaning and the 3rd Standard Gases sample introduction;
Step S8: center-controlling computer is sent instruction by the industrial control configuration program, and the field control terminal of sampling section selects corresponding C group the 3rd threeway Electromagnetic Control starting valve to open, and closes the 3rd sampling box; Gas circuit assignment of logical device receiving center is controlled the instruction that computing machine sends, and the gas circuit logic transfers analytical gas sample NO and CO to 2In the 3rd sampling box, gas enters carbon dioxide infrared spectrum analyser and nitrogen-oxide analyzer, by gas circuit assignment of logical device; Simultaneously, gas chromatograph is completed calibrating gas CH 4, CO 2And N 2The concentration analysis of O, system completes the 3rd sampling box CO of gaseous sample for the first time 2, the NO concentration analysis, the 3rd calibrating gas CH 4, CO 2And N 2The O concentration analysis;
Step S9: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, the state of gas circuit assignment of logical device transferred analytical gas sample CH to 4, CO 2And N 2O； In the 3rd sampling box, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the 3rd sampling box gaseous sample CH for the first time 4, CO 2And N 2The O concentration analysis;
Step S10: center-controlling computer is sent instruction by the industrial control configuration program, and C group the first sampling three-way solenoid valve is closed in the gas collecting unit of gas collecting analysis portion, opens A group the first sampling three-way solenoid valve, opens the first sampling channel; The gas circuit logic of gas circuit assignment of logical device is in gas chromatographic analysis gaseous sample, CO 2Analyser and NO XIn analyser detected state, the first sampling box, gas carries out CO by capnograph, nitrogen-oxide analyzer, 2Detect with NO concentration; System completes the first sampling box gaseous sample CO for the second time 2, the NO concentration analysis;
Step S11: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, gas circuit assignment of logical device state transferred analytical gas sample CH to 4, CO 2And N 2O； In case, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the first sampling box gaseous sample CH for the second time 4, CO 2And N 2The O concentration analysis;
Step S12: center-controlling computer is sent instruction by the industrial control configuration program, and A group the first sampling three-way solenoid valve is closed in the gas collecting unit of gas collecting analysis portion, opens B group the first sampling three-way solenoid valve, opens the second sampling channel; The gas circuit logic of gas circuit assignment of logical device is in gas chromatographic analysis gaseous sample, CO 2Analyser and NO XIn analyser detected state, the second sampling box, gas carries out CO by capnograph, nitrogen-oxide analyzer, 2Detect with NO concentration; System completes the second sampling box gaseous sample CO for the second time 2, the NO concentration analysis;
Step S13: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, gas circuit assignment of logical device state transferred analytical gas sample CH to 4, CO 2And N 2O； In the second sampling box, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the second sampling box gaseous sample CH for the second time 4, CO 2And N 2The O concentration analysis;
Step S14: center-controlling computer is sent instruction by the industrial control configuration program, and B group the first sampling three-way solenoid valve is closed in the gas collecting unit of gas collecting analysis portion, opens C group the first sampling three-way solenoid valve, opens the 3rd sampling channel; The gas circuit logic of gas circuit assignment of logical device is in gas chromatographic analysis gaseous sample, CO 2Analyser and NO XIn analyser detected state, the 3rd sampling box, gas carries out CO by capnograph, nitrogen-oxide analyzer, 2Detect with NO concentration; System completes the 3rd sampling box gaseous sample CO for the second time 2, the NO concentration analysis;
Step S15: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, the state of gas circuit assignment of logical device transferred analytical gas sample CH to 4, CO 2And N 2O； In case, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the 3rd sampling box gaseous sample CH for the second time 4, CO 2And N 2The O concentration analysis;
Repeating step S10-S15, complete the first sampling box, the second sampling box and the 3rd sampling box for the third time, the 4th time and the 5th gaseous sample analysis, complete the analysis of three calibrating gas of a round, 5 collected specimens of each sampling box; All concentration datas send to the 3rd industrial control module by the gas collecting analysis portion with voltage signal, enter the center-controlling computer storage with digital signal after digital-to-analog conversion; The environment weather parameter sends to the first industrial control module by sampling section in the current signal mode, is that digital signal enters the center-controlling computer storage through digital-to-analog conversion.
Beneficial effect of the present invention:
Split type sampling box of the present invention, when opening, except top case case lid was opened automatically, casing was also opened on axially on one side take base, is scissors mouth shape between base and casing, improved the ventilation condition in casing, effectively reduced the greenhouse effect in case; Secondly, knockdown cabinet design can select top case or top case to add the mode that extends case different the vegetation period, to adapt to the observation needs of crop difference growth phases.
The use of gas circuit assignment of logical device of the present invention realizes the switching of sample gas between different detecting instruments, takes into account simultaneously the demarcation of instrument.Gas circuit assignment of logical device is comprised of five three-way solenoid valves, by the combination of these five three-way solenoid valve different conditions, completes respectively gaseous sample at NO and CO 2Concentration analysis, greenhouse gases (CO 2, CH 4And N 2O) conversion between the process such as concentration analysis, calibrating gas sample introduction and analysis, the removal of interior conduit condensate water is completed when Multiple components is analyzed and is saved analysis time, obtains more data volume.
The present invention proposes a cover based on static glass box, be applicable to multiprocessing, multiple multiple field experiment, can be synchronously, high frequency, long-term Automatic continuous in-situ observation soil and the short vegetation minimum gas technical equipment system of discharging.This system combines automatic box technology and vapor-phase chromatography, infrared analysis and chemoluminescence method, can carry out simultaneously N 2O, CH 4, CO 2With the discharging observation of NO, and measure relevant environmental parameter.This is that a cover can be for a long time carries out the automatic system of subsynchronous Continuous Observation every days 6 incessantly to the minimum gas discharging of 12 some positions in the field, by computer controlled automatic sample collection and analysis, storage, can for a long time, effectively obtain minimum gas emission flux in-situ observation data, data are efficient to be reached more than 90%; The envirment factor supporting with the emission flux data be can measure, the soil moisture of case inner air and outer air temperature and layering and soil moisture etc. comprised.System accuracy of the present invention is high, accurately and reliably, soil and the short vegetation minimum gas discharging observational data of continuous whole, reduce observation personnel's labour intensity and workload.The present invention can original position obtains the long-term simultaneous observation valid data of carbon nitrogen minimum gas, it is the basis of research terrestrial ecosystems-large gas carbon nitrogen minimum gas exchange process, rule and mechanism, be also measured data and the parameter of obtaining verification model, and estimate the very necessary detection technique means of ecosystem reduction of greenhouse gas discharge measure validity.
Description of drawings
Fig. 1 is that minimum gas automatic observing system of the present invention gathers and the analytic system general diagram;
Fig. 2 is that minimum gas automatic observing system of the present invention gathers and analysis circuit figure;
Fig. 3 is that minimum gas automatic observing system of the present invention gathers and analyze pneumatic diagram;
Fig. 4 a is the work schematic diagram of gas sampling of the present invention section opening;
Fig. 4 b is the work schematic diagram of gas sampling of the present invention section closed condition;
Fig. 5 is gas circuit assignment of logical device shop drawing of the present invention;
Fig. 5 a gas circuit logical one-Standard Gases enters greenhouse gases sample introduction instrument, NOX/CO 2Pipeline-cleaning;
Fig. 5 b gas circuit logic 2-gas chromatographic analysis N 2O, CH 4, CO 2Standard Gases; NOX/CO 2The analytical gas sample;
Fig. 5 c gas circuit logic 3-gaseous sample enters greenhouse gases sample introduction instrument; NOX/CO 2Emptying;
Fig. 5 d gas circuit logic 4-gas chromatographic analysis gaseous sample; NOX/CO 2Detect next gaseous sample;
Fig. 5 e gas circuit logic 5-pipeline dewaters.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail:
Fig. 1 illustrates minimum gas automatic observing system the general frame, formed by center-controlling computer 1, industrial control module group 2, gas collecting analysis portion 3 and sampling section 4, wherein:
Center-controlling computer 1 is industrial control computer, be connected by the RS232 interface with industrial control module group 2, by the configuration software coding in center-controlling computer 1, generate and send the industry control instruction of industry control instruction, gas circuit and gas collection analysis of the case lid of sampling section 4; Reception and storage industry control module group 2 are sent the simulating signal that contains environment weather parameter and minimum gas concentration data;
Industrial control module group 2 is connected with sampling section with center-controlling computer 1, gas collecting analysis portion 3 respectively and is connected by interface; Gas collecting analysis portion 3 is connected with the pipeline of sampling section 4 respectively, and gas collecting analysis portion 3 receives the pipeline of sampling section 4 and carries gaseous sample; The industry control signal of case lid, gas circuit and the gas collection analysis of the sampling section 4 that industrial control module group 2 receiving centers control that computing machines 1 generate, the output that receives sampling section 4 have environment weather parameter current signal; 3 outputs of receiver gases collection analysis section have minimum gas concentration data voltage signal; Wherein: case lid, gas circuit and the gas collection analysis industry control signal of 2 pairs of industrial control module groups sampling section 4 carries out voltage transitions and generates and export multi-way switch signal, the gas circuit assignment of logical signal of the case lid of controlling sampling section 4 and control the multi-way switch voltage signal that gas collecting is analyzed, case lid that be used for to control sampling section 4 opens and closes automatically according to the industry control signal, be used for to control the gaseous sample that gas collecting analysis portion 3 carries the pipeline of sampling section 4 according to the industry control signal and sample, be used for the CH to the gaseous sample of gas collecting analysis portion 3 4, CO 2, N 2O and NO concentration data carry out gas chromatography, NDIR (Non-Dispersive Infrared) and chemiluminescence analysis; 4 outputs of 2 pairs of industrial control module groups sampling section have environment weather parameter current signal to be processed, and generates and export the simulating signal that contains the environment weather parameter; 2 pairs of gas collecting analysis portion of industrial control module group 3 output has the gas concentration data voltage signal to be processed, and generates and export to contain the gas concentration data analog signal.
Fig. 2 illustrates the minimum gas automatic observing system and gathers and analysis circuit figure, and wherein: industrial control module group 2 comprises communication module 21, the first industrial control module 22, the second industrial control module 23 and the 3rd industrial control module 24.The first industrial control module 22 is connected with sampling section 4, and the first industrial control module 22 is according to the industry control signal of the case lid of sampling section 4, generates and export the control signal that the case lid orderly close-down of realizing sampling section 4 and order are opened;
The gas collecting unit 32 that has in the second industrial control module 23 and gas collecting analysis portion 3 is connected, and according to the industry control signal of gas collecting, generates and exports the collection analysis that gaseous sample is carried out ten alternatives and control;
The gas circuit assignment of logical device 31 that has in the 3rd industrial control module 24 and gas collecting analysis portion 3 is connected, industry control signal according to gas analysis, generate and export the control signal that gas circuit assignment of logical device 31 is controlled, realize that gaseous sample enters each detecting instrument according to setting program;
Communication module 21 is connected with center-controlling computer 1 by interface, controls the 22, second industrial control module 23 and the 3rd industrial control module 24 parallel joins by communication bus and the first industrial module; Communication module 21 receiving centers are controlled the industry control signal of the industrial control configuration program transmission of computing machine 1, and the industry control signal is transferred to the first industrial control module 22, the second industrial control module 23 and the 3rd industrial control module 24; Communication module 21 receives the simulating signal of the first industrial control module 22 and the 3rd industrial control module 24 transmissions and is transferred to center-controlling computer 1; The first industrial control module 22 receives the industry control signals and is converted to the switching value signal and flows to sampling section 4, case lid that be used for to control sampling section 4 opens or closes, receive 4 outputs of sampling section have environment weather parameter current signal and the generating digital simulating signal sends to communication module 21; The second industrial control module 23 receives the industry control signal and is converted to the switching value signal and sends to gas collecting and analysis portion 3, is used for controlling the gaseous sample collection; The 3rd industrial control module 24 receives the industry control signal and is converted to the switching value signal and sends to gas collecting and analysis portion 3, is used for controlling the CH of gaseous sample 4, CO 2, N 2O and NO concentration analysis, receiver gases collection analysis section 3 generates has that minimum gas concentration voltage signal is changed and is that simulating signal sends to communication module 21.
Gas collecting analysis portion 3 comprises gas circuit assignment of logical device 31, gas collecting unit 32, capnograph 33, nitrogen-oxide analyzer, 34, greenhouse gases sample introduction instrument 35 and gas chromatograph 36.Gas collecting unit 32 is connected with industrial control module group 2, and gas collecting unit 32 receives the switching signal of the second industrial control module 23 outputs of industrial control module groups 2, is used for controlling the selection in gaseous sample collection source; Gas circuit assignment of logical device 31 is connected with industrial control module group 2, gas circuit assignment of logical device 31 receives the switching signal of the 3rd industrial control module 24 outputs of industrial control module group 2, generates and export the control signal that gaseous sample is switched between capnograph 33, nitrogen-oxide analyzer, 34, greenhouse gases sample introduction instrument 35 and gas chromatograph 36; Capnograph 33, nitrogen-oxide analyzer, 34 are connected with gas chromatograph and are connected with gas circuit assignment of logical device 31, the concentration data that capnograph 33, nitrogen-oxide analyzer, 34 and gas chromatograph 36 generated and exported gaseous sample sends to the 3rd industrial control module 24 of industrial control module 2 with voltage signal, be used for completing the CH to gaseous sample 4, CO 2, N 2O and NO concentration are analyzed.
The mechanical part of sampling section 4 is by many groups sampling box, A group threeway Electromagnetic Control starting valve AQ, and B group threeway Electromagnetic Control starting valve BQ and C group threeway Electromagnetic Control starting valve CQ, air compressor 47, driving cylinder (unmarked in figure) and Tai Fulong high drive gas circuit pipeline (unmarked in figure) form; Drive cylinder and be contained in sampling box both sides, be connected with threeway Electromagnetic Control starting valve by driving gas circuit pipeline; Connect with the air intake opening b of A group threeway Electromagnetic Control starting valve AQ, B group threeway Electromagnetic Control starting valve BQ and C group threeway Electromagnetic Control starting valve CQ respectively in the gas outlet of air compressor 47, A group threeway Electromagnetic Control starting valve AQ, B group threeway Electromagnetic Control starting valve BQ are connected with enterprising gas port by the lower air intake opening of Tai Fulong high drive pipeline driving corresponding to each cylinder respectively with normally closed port c with the normal opening a of C group threeway Electromagnetic Control starting valve CQ.
Described A group threeway Electromagnetic Control starting valve AQ, B group threeway Electromagnetic Control starting valve BQ and C group threeway Electromagnetic Control starting valve CQ have altogether 12 threeway Electromagnetic Control starting valves and comprise:
Described A group threeway Electromagnetic Control starting valve AQ has the first threeway Electromagnetic Control starting valve AQ1, the second threeway Electromagnetic Control starting valve AQ2, the 3rd threeway Electromagnetic Control starting valve AQ3 and the 4th threeway Electromagnetic Control starting valve AQ4;
Described B group threeway Electromagnetic Control starting valve BQ has the first threeway Electromagnetic Control starting valve BQ1, the second threeway Electromagnetic Control starting valve BQ2, the 3rd threeway Electromagnetic Control starting valve BQ3 and the 4th threeway Electromagnetic Control starting valve BQ4;
Described C group threeway Electromagnetic Control starting valve CQ has the first threeway Electromagnetic Control starting valve CQ1, the second threeway Electromagnetic Control starting valve CQ2, the 3rd threeway Electromagnetic Control starting valve CQ3 and the 4th threeway Electromagnetic Control starting valve CQ4.
Described many group sampling boxes are Split type structure, it comprises: A group sampling box 44, B group sampling box 45 and C group sampling box 46, A group sampling box 44 comprises: A sampling box 441 to 444, B group sampling boxes 45 comprise: B sampling box 451 to 454, C group sampling boxes 46 comprise: C sampling box 461 to 464.
Sampling section 4 circuit comprise many group field control terminals and many group sampling boxes; Described many groups field control terminal comprises: A group field control terminal 41, B group field control terminal 42, C group field control terminal 43;
this A organizes field control terminal 41, B group field control terminal 42 and C group field control terminal 43 respectively with the first industrial control module 22 parallel joins, A group field control terminal 41, B group field control terminal 42 and C organize field control terminal 43 and receive the switching signal that the first industrial control modules 22 send, the A group threeway Electromagnetic Control starting valve AQ1 to AQ4 of control sampling section 4, B group threeway Electromagnetic Control starting valve BQ1 to BQ4, the switch of C group threeway Electromagnetic Control starting valve CQ1 to CQ4 changes the pressurized air that drives cylinder and flows to, complete A group sampling box 44, the opening and closing of each sampling box in B group sampling box 45 and C group sampling box 46, and A group field control terminal, B group field control terminal and C group field control terminal also receive the measurement current signal that sampling box environmental parameter detector (temperature and humidity) is beamed back, and is transported to the first industrial control module 22 in industrial control module group 2.
Described communication module is 485 modules, and the industrial control module group comprises switching value module, analog module, two-way switch power supply and AC light-emitting pipe pilot lamp.The field control terminal comprises solid-state relay, direct-current switch power supply, AC light-emitting pipe pilot lamp, supply socket and three-pole switch.
Fig. 3 illustrates that the minimum gas automatic observing system gathers and analyze pneumatic diagram, is comprised of gas collecting analysis portion 3 and sampling section 4.
Gas collecting analysis portion 3 comprises gas circuit assignment of logical device 31, gas collecting unit 32, capnograph 33, nitrogen-oxide analyzer, 34, greenhouse gases sample introduction instrument 35, gas chromatograph 36, calibrating gas 30, matter flow control meter 38, flowmeter 39 and stainless steel pipeline.Described gas circuit assignment of logical device 31 is comprised of two-way electromagnetic valve 311, the first three-way solenoid valve 312, the second three-way solenoid valve 313, the 3rd three- way solenoid valve 314 and 315 5 solenoid valves of the 4th three-way solenoid valve; The first injection port b of the first three-way solenoid valve 312 is connected with the cold-trap 323 that dewaters, the first normal opening a of the first three-way solenoid valve 312 is connected with the second normal opening a of the second three-way solenoid valve 313, and the first normally closed port c of the first three-way solenoid valve 312 is connected with the 3rd normally closed port c of the 3rd three-way solenoid valve 314; The second injection port b of the second three-way solenoid valve 313 is connected with capnograph 33, the second emptying of normally closed port c; Capnograph 33 and nitrogen-oxide analyzer, 34 series windings, matter flow controller 38 and flowmeter 39 are connected in the exit of nitrogen-oxide analyzer, 34; The 3rd normal opening a of the 3rd three-way solenoid valve 314 is connected with calibrating gas 30, and the 3rd air intake opening b of the 3rd three-way solenoid valve 314 is connected with the 4th normally closed port c of the 4th three-way solenoid valve 315; The 4th air intake opening b of the 4th three-way solenoid valve 315 is connected with greenhouse gases sample introduction instrument 35, the 4th emptying of normal opening a.Two-way electromagnetic valve 311 is connected with the bottom of the cold-trap 323 that dewaters, and discharges the water in the cold-trap 323 that dewaters during unlatching.
Gas collecting unit 32 is comprised of many groups of sampling three-way solenoid valves, buncher 321, aspiration pump 322 and the cold-traps 323 that dewater.Many group sampling three-way solenoid valves comprise: A group sampling three-way solenoid valve AZ, B group sampling three-way solenoid valve BZ and C group sampling three-way solenoid valve CZ, A group sampling three-way solenoid valve AZ contain the first sampling three-way solenoid valve AZ1 to the four sampling three-way solenoid valve AZ4; B group sampling three-way solenoid valve BZ contains the first sampling three-way solenoid valve BZ1 to the four sampling three-way solenoid valve BZ4; C group sampling three-way solenoid valve CZ contains the first sampling three-way solenoid valve CZ1 to the four sampling three-way solenoid valve CZ4; The normal opening a of each sampling three-way solenoid valve of many group sampling three-way solenoid valves is emptying, and the normally closed port c of each sampling three-way solenoid valve all is connected with buncher 321; The injection port b of A group sampling threeway three-way solenoid valve AZ is connected with A group sampling box respectively; The injection port b of B group sampling three-way solenoid valve BZ is connected with B group sampling box respectively; The injection port b of C group sampling three-way solenoid valve CZ is connected with C group sampling box respectively; Aspiration pump 322 air intake opening ends are connected with buncher 321, and the gas outlet end is connected with the cold-trap 323 that dewaters.
Described the first three-way solenoid valve 312, the second three-way solenoid valve 313, the 3rd three-way solenoid valve 314 and the 4th three-way solenoid valve 315, A group, B group and C group threeway Electromagnetic Control starting valve AQ, BQ and CQ, A group sampling three-way solenoid valve AZ, B group sampling three-way solenoid valve BZ and C group sampling three-way solenoid valve CZ use three-way solenoid valve, this three-way solenoid valve is two-position three way magnetic valve, and air intake opening b, normal opening a and three mouths of normally closed port c are arranged; (close) in the no power situation, air intake opening b and normal opening a communicate, and normally closed port c closes; In the energising situation (unlatching), air intake opening b and normally closed port c communicate, and normal opening a closes.
The on off state that 31 5 solenoid valves of gas circuit assignment of logical device are realized by programmed control, complete five kinds of logic states: 1. Standard Gases enters greenhouse gases sample introduction instrument, CO 2Analyser and NO XThe analyser pipeline-cleaning; 2. gas chromatographic analysis N 2O, CH 4, CO 2Standard Gases; 3. gaseous sample enters greenhouse gases sample introduction instrument, CO 2Analyser and NO XAnalyser emptying; 4. gas chromatographic analysis gaseous sample, CO 2Analyser and NO XAnalyser detect next gaseous sample and 5. pipeline dewater;
Fig. 4 a is the work schematic diagram of gas sampling case opening of the present invention; Take sampling box 441 as example.Sampling box 441 is comprised of case lid 4411, casing 4412, base 4414, support 4415, driving cylinder 4413, temperature sensor 4416, humidity sensor 4417, thief hatch 4418, mixed gas fan 4419 and balance pipe 4410.Wherein, balance pipe 4410 is positioned on casing 4412, and base 4414 is welded by the stainless steel angle steel, in four fillet welding of base 4414, four downward supports 4415 of cutting edge is arranged.The three-dimensional side frames of casing 4412 is welded by the stainless steel angle steel, and wall panel adopts the thick polycarbonate plate of 2mm, sees through spectral width, and the major part of ultraviolet and long wave can see through 85%.Casing 4412 and case lid 4411 be by the stainless steel chain connection, and casing 4412 is connected with base and is connected by rotating shaft.Casing 4412 can solely be comprised of the top packing list, also can and extend case by the top case and form, to adapt to the upgrowth situation that is observed crop.Temperature sensor 4416, humidity sensor 4417, thief hatch 4418 and mixed gas fan 4419 are housed on casing 4412 inwalls.Two drive cylinder 4413 and are divided in casing 4412 both sides, and the driving gas that drives cylinder 4413 is provided by air compressor 47.Casing 4412 has the transparent thin board of five faces, and transparent thin board is selected makrolon material.
The driving air-flow of each sampling box is to controlled by corresponding threeway Electromagnetic Control starting valve, as sampling box 441 corresponding A group the first threeway Electromagnetic Control starting valve AQ1.Threeway is controlled when starting the solenoid valve no power, driving cylinder 4413 slide bars under compressed-air actuated effect stretches out, case lid 4411 upwardly opens, and 4412 of casings are approximately 75 ° of angles, simultaneously casing 4412 is opened as rotating shaft on one side take base 4414,4414 of casing 4412 and bases are opened and are scissors mouth shape, and sampling box 441 is opened; The first industrial control module 22 receiving centers control to calculate the 1 industry control signals that send and are converted to switching signal and send to A group field control terminal 41.The relay of A group field control terminal 41 is opened, the first corresponding threeway is controlled and is started solenoid valve AQ1 energising, the air flow of air compressor 47 changes, slide bar at air pressure lower cylinder 4413 is retracted, casing 4412 is got back to base 4414, case lid 4411 is closed simultaneously, and sampling box 441 is closed, and is the work schematic diagram of sampling box closed condition as Fig. 4 b.Equal adhesive seal bar between the framework of case lid 4411 and base 4414, air tight in sampling box when guaranteeing to close.Cut knife-edge part what casing 4412 and base 4414 opened, two torsion springs (not shown in FIG.) are installed, the vibrations that during with elimination switch sampling box, the base quick washing caused.
The advantage of split type sampling box is: during opening, except top case case lid was opened automatically, casing was also opened on axially on one side take base, is scissors mouth shape between base and casing, improved the ventilation condition in casing, effectively reduced the greenhouse effect in case; Secondly, knockdown cabinet design can select top case or top case to add the mode that extends case different the vegetation period, to adapt to the observation needs of crop difference growth phases.
Fig. 5 a-Fig. 5 e illustrates the duty of gas circuit assignment of logical device 31 each three-way solenoid valve under different gas circuit logics.Gas circuit assignment of logical device 31 is core of the present invention.Gas circuit assignment of logical device 31 is comprised of the first three-way solenoid valve 312, the second three-way solenoid valve 313, the 3rd three-way solenoid valve 314, the 4th three-way solenoid valve 315 and two-way electromagnetic valve 311, by the combination of these five solenoid valve different conditions, complete respectively gaseous sample NO and CO 2Concentration analysis, greenhouse gases (CO 2, CH 4And N 2O) process such as concentration analysis, calibrating gas sample introduction and analysis, the removal of interior conduit condensate water is completed when the lot of trace gas concentration is analyzed and is saved analysis time.
Fig. 5 a be the gas circuit logic 1.-Standard Gases enters greenhouse gases sample introduction instrument, CO 2Analyser and NO XThe analyser pipeline-cleaning; Two-way electromagnetic valve 311, the first three-way solenoid valve 312, the second three-way solenoid valve 313 and solenoid valve the 3rd threeway 314 at this moment closed, and the 4th three-way solenoid valve 315 is opened;
Fig. 5 b gas circuit logic 2.-gas chromatographic analysis N 2O, CH 4, CO 2Standard Gases; CO 2Analyser and NO XAnalyser analytical gas sample, two-way electromagnetic valve 311, the first three-way solenoid valve 312, the second three-way solenoid valve 313, the 3rd three-way solenoid valve 314 and the 4th three-way solenoid valve 315 Close Alls at this moment;
Fig. 5 c gas circuit logic 3.-gaseous sample enters greenhouse gases sample introduction instrument, CO 2Analyser and NO XAnalyser emptying; This moment, two-way electromagnetic valve 311 was closed, and the first three-way solenoid valve 312, the second three-way solenoid valve 313, the 3rd three-way solenoid valve 314 and the 4th three-way solenoid valve 315 are opened;
Fig. 5 d gas circuit logic 4.-the gas chromatographic analysis gaseous sample, CO 2Analyser and NO XAnalyser detects next gaseous sample; This moment, two-way electromagnetic valve 311 was closed, and the first three-way solenoid valve 312, the second three-way solenoid valve 313 and the 4th three-way solenoid valve 315 are opened, and the 3rd three-way solenoid valve 314 is closed;
Fig. 5 e gas circuit logic 5.-pipeline dewaters; Two-way electromagnetic valve 311 unlatchings this moment, the first three-way solenoid valve 312, the 4th three-way solenoid valve 315 are closed, and the second three-way solenoid valve 313 and the 3rd three-way solenoid valve 314 are opened;
In detecting instrument, capnograph 33 and nitrogen-oxide analyzer, 34 are the commercial goods, can be directly used in sample CO 2Detection with NO.And the sample introduction of gas chromatograph 36 part can not satisfy and analyzes simultaneously CH 4, CO 2And N 2The needs of O after needing greenhouse gases sample introduction instrument 35 that configuration atmospheric physics institute develops voluntarily, could be realized CH 4, CO 2And N 2The Synchronization Analysis of three kinds of greenhouse gases of O.
The automatic collection of minimum gas and Application of analysis system are divided into three groups in soil and short vegetation at these 12 sampling boxes, every group of four sampling boxes, and three kinds, corresponding field processing A, B, C, each processes four repetitions; Requiring each field to process has flux data in each hour, and flux data is produced by 5 concentration datas.Therefore, need order to collection and an analysis that repeats gaseous sample of A, B, three processing of C in each hour, i.e. three sampling boxes of orderly close-down per hour extract in case gaseous sample and analyze; After four hours, all sampling boxes are completed once circulation; Can complete six circulations every day.
Write the industry control program in the configuration software of center-controlling computer 1 according to above-mentioned requirements, be respectively the first sampling box, the second sampling box and the 3rd sampling box according to sampling order with sampling box 441, sampling box 451 and sampling box 461, in first hour, gaseous sample collection and analytic process are example, and step is as follows:
During measurement, air compressor 47 and aspiration pump 322 continuous operations.
Step S1: center-controlling computer 1 is sent instruction by the industrial control configuration program, the gas collecting unit 32 selection A group first sampling three-way solenoid valve AZ1 of gas collecting analysis portion 3 open, the first sampling channel that unlatching is comprised of A group the first sampling three-way solenoid valve AZ1 and pipeline, the gas circuit assignment of logical device 31 of gas collecting analysis portion 3 sent into the gas in the sampling box 441 of correspondence by aspiration pump 322; 1. gas circuit assignment of logical device 31 is in the gas circuit logic; The b mouth of the interior gas of sampling box 441 by pipeline, A group the first sampling three-way solenoid valve AZ1 and the 2nd b mouth and the 2nd a mouth of a b mouth of c mouth, buncher 321, the cold-trap 323 that dewaters, the first three-way solenoid valve 312 and an a mouth, the second three-way solenoid valve 313, enter capnograph 33 and nitrogen-oxide analyzer, 34, by matter flow controller 38, discharge system from the drain of flowmeter 39 at last, with the interior air scour sample lines of sampling box 441.Simultaneously, calibrating gas 30 by the 3rd three-way solenoid valve 314 the 3rd a mouth and the 4th c mouth and the 4th b mouth of the 3rd b mouth, the 4th three-way solenoid valve 315 enter greenhouse gases sample introduction instrument; System completes pipeline-cleaning and first Standard Gases sample introduction;
Step S2: center-controlling computer 1 is sent instruction by the industrial control configuration program, the field control terminal 41 of sampling section selects corresponding A group the first threeway Electromagnetic Control starting valve AQ1 to open, driving cylinder 4413 compressed airs of sampling box 411 flow to and change, the slide bar that drives cylinder 4413 is regained, and sampling box 441 is closed; Gas circuit assignment of logical device receiving center is controlled the instruction that computing machine sends, and transfers the gas circuit logic to 2.; The interior gas of sampling box 441 by A organize the b mouth of the first sampling three-way solenoid valve AZ1 and a mouth, buncher 321, the cold-trap 323 that dewaters, through the 2nd a mouth and the 2nd b mouth of a b mouth of gas circuit assignment of logical device 31 first three-way solenoid valves 312 and an a mouth, the second three-way solenoid valve 313, then enter the CO that capnograph 33 and nitrogen-oxide analyzer, 34 carry out first air samples in sampling box 441 2With the NO concentration analysis; Simultaneously, gas chromatograph 36 begins to analyze the CH of first Standard Gases sample 4, CO 2And N 2O concentration.System completes the first sampling box NO, the CO of gaseous sample for the first time 2Concentration analysis, first calibrating gas CH 4, CO 2And N 2The O concentration analysis;
Step S3: center-controlling computer 1 is sent instruction by the industrial control configuration program, after gas circuit assignment of logical device 31 receives instruction, transfers the gas circuit logic to 3.; The first three-way solenoid valve 312, the second three-way solenoid valve 313, the 3rd three-way solenoid valve 314 and the 4th three-way solenoid valve 315 are opened, the interior gas of sampling box 441 is by a b mouth and a c mouth of the first three-way solenoid valve 312, the 4th c mouth and the 4th b mouth of the 3rd c mouth of the 3rd three-way solenoid valve 314 and the 3rd b mouth, the 4th three-way solenoid valve 315 enter greenhouse gases sample introduction instrument 35, after sample introduction 20 seconds, the 4th three-way solenoid valve 315 is closed, the CH of gas equilibrium gas chromatograph 36 beginning analytical sampling casees 441 interior first air samples after 20 seconds 4, CO 2And N 2O concentration.System completes the first sampling box gaseous sample CH for the first time 4, CO 2And N 2The O concentration analysis;
Step S4: center-controlling computer 1 is sent instruction by the industrial control configuration program, A group the first sampling three-way solenoid valve AZ1 is closed in the gas collecting unit 32 of gas collecting analysis portion 3, open B group the first sampling three-way solenoid valve BZ1, open the second sampling channel that is formed by B group the first sampling three-way solenoid valve BZ1 and pipeline; Gas circuit assignment of logical device 31 receiving centers are controlled the instruction of computing machine 1, transfer the gas circuit logic to 1., are in pipeline-cleaning, Standard Gases sample introduction state; B group the first sampling three-way solenoid valve BZ1 opens, aspiration pump 322 begins to extract the interior gas of sampling box 451, the 2nd b mouth and the 2nd a mouth of the one b mouth of the b mouth by gas circuit assignment of logical device 31, B group the first sampling three-way solenoid valve BZ1 and c mouth, buncher 321, the cold-trap 323 that dewaters, the first three-way solenoid valve 312 and an a mouth, the second three-way solenoid valve 313, enter capnograph 33 and nitrogen-oxide analyzer, 34, by matter flow controller 38, discharge from the drain of flowmeter 39 at last, use the interior air scour sample lines of sampling box 451 200 seconds; Simultaneously, the 4th c mouth and the 4th b mouth of the 3rd a mouth by the 3rd three-way solenoid valve 314 and the 3rd b mouth, the 4th three-way solenoid valve 315 enter greenhouse gases sample introduction instrument 35 and gas chromatograph 36 to calibrating gas 30 again; System completes pipeline-cleaning and second Standard Gases sample introduction;
Step S5: center-controlling computer 1 is sent instruction by the industrial control configuration program, and the field control terminal 42 of sampling section 4 selects corresponding B group the first threeway Electromagnetic Control starting valve BQ1 to open, and closes sampling box 451; Gas circuit assignment of logical device 31 receiving centers are controlled the instruction that computing machine 1 sends, and 2. the gas circuit logic transfers the gas circuit logic to; The interior gas of sampling box 451 by B organize the b mouth of the first sampling three-way solenoid valve BZ1 and a mouth, buncher 321, the cold-trap 323 that dewaters, through the 2nd a mouth and the 2nd b mouth of a b mouth of gas circuit assignment of logical device 31 first three-way solenoid valves 312 and an a mouth, the second three-way solenoid valve 313, then enter the CO that capnograph 33 and nitrogen-oxide analyzer, 34 carry out first air samples in sampling box 451 2With the NO concentration analysis; Simultaneously, gas chromatograph 36 begins to analyze the CH of second Standard Gases sample 4, CO 2And N 2O concentration.System completes the second sampling box NO, the CO of gaseous sample for the first time 2Concentration analysis, second calibrating gas CH 4, CO 2And N 2The O concentration analysis;
Step S6: center-controlling computer 1 is sent instruction by the industrial control configuration program, after the gas circuit assignment of logical device 31 of gas collecting analysis portion 3 receives instruction, transfer the gas circuit logic to 3., the interior gas of sampling box 451 is by a b mouth and a c mouth of the first three-way solenoid valve 312, and the 4th c mouth and the 4th b mouth of the 3rd c mouth of the 3rd three-way solenoid valve 314 and the 3rd b mouth, the 4th three-way solenoid valve 315 enter greenhouse gases sample introduction instrument 35; Subsequently, the CH of gas equilibrium gas chromatograph 36 beginning analytical sampling casees 451 interior first air samples after 20 seconds 4, CO 2And N 2O concentration; System completes the second sampling box gaseous sample CH for the first time 4, CO 2And N 2The O concentration analysis;
Step S7: center-controlling computer 1 is sent instruction by the industrial control configuration program, B group the first sampling three-way solenoid valve BZ1 is closed in the gas collecting unit 32 of gas collecting analysis portion 3, open C group the first sampling three-way solenoid valve CZ1, open the 3rd sampling channel that is formed by C group the first sampling three-way solenoid valve CZ1 and pipeline; 1. gas circuit assignment of logical device 31 is in the gas circuit logic, the b mouth of the interior gas of sampling box 461 by pipeline, C group the first sampling three-way solenoid valve CZ1 and the 2nd b mouth and the 2nd a mouth of a b mouth of c mouth, buncher 321, the cold-trap 323 that dewaters, the first three-way solenoid valve 312 and an a mouth, the second three-way solenoid valve 313, enter capnograph 33 and nitrogen-oxide analyzer, 34, by matter flow controller 38, discharge system from the drain of flowmeter 39 at last, with the interior air scour sample lines of sampling box 461.Simultaneously, calibrating gas 30 by the 3rd three-way solenoid valve 314 the 3rd a mouth and the 4th c mouth and the 4th b mouth of the 3rd b mouth, the 4th three-way solenoid valve 315 enter greenhouse gases sample introduction instrument; System completes pipeline-cleaning and the 3rd Standard Gases sample introduction;
Step S8: center-controlling computer 1 is sent instruction by the industrial control configuration program, and the field control terminal 43 of sampling section 4 selects corresponding C group the first threeway Electromagnetic Control starting valve CQ1 to open, and closes sampling box 461; Gas circuit assignment of logical device 31 receiving centers are controlled the instruction that computing machine 1 sends, and transfer the gas circuit logic to 2.; The interior gas of sampling box 461 by C organize the b mouth of the first sampling three-way solenoid valve CZ1 and a mouth, buncher 321, the cold-trap 323 that dewaters, through the 2nd a mouth and the 2nd b mouth of a b mouth of gas circuit assignment of logical device 31 first three-way solenoid valves 312 and an a mouth, the second three-way solenoid valve 313, then enter the CO that capnograph 33 and nitrogen-oxide analyzer, 34 carry out first air samples in sampling box 461 2With the NO concentration analysis; Simultaneously, gas chromatograph 36 is completed calibrating gas CH 4, CO 2And N 2The concentration analysis of O, system completes the 3rd sampling box CO of gaseous sample for the first time 2, the NO concentration analysis, the 3rd calibrating gas CH 4, CO 2And N 2The O concentration analysis;
Step S9: center-controlling computer 1 is sent instruction by the industrial control configuration program, after the gas circuit assignment of logical device 31 of gas collecting analysis portion 3 receives instruction, transfers the gas circuit logic to 3.; The interior gas of sampling box 461 is by a b mouth and a c mouth of the first three-way solenoid valve 312, the 4th c mouth and the 4th b mouth of the 3rd c mouth of the 3rd three-way solenoid valve 314 and the 3rd b mouth, the 4th three-way solenoid valve 315 enter greenhouse gases sample introduction instrument 35, after sample introduction 20 seconds, the 4th three-way solenoid valve 315 is closed, the CH of gas equilibrium gas chromatograph 36 beginning analytical sampling casees 461 interior first air samples after 20 seconds 4, CO 2And N 2O concentration.System completes the 3rd sampling box gaseous sample CH for the first time 4, CO 2And N 2The O concentration analysis;
Step S10: center-controlling computer 1 is sent instruction by the industrial control configuration program, and C group the first sampling three-way solenoid valve CZ1 is closed in the gas collecting unit 32 of gas collecting analysis portion 3, opens A group the first sampling three-way solenoid valve AZ1, opens the first sampling channel; 4. gas circuit assignment of logical device 31 is in the gas circuit logic, the interior gas of sampling box 441 is organized the 2nd b mouth and the 2nd a mouth of a b mouth of the b mouth of the first sampling three-way solenoid valve AZ1 and c mouth, buncher 321, the cold-trap 323 that dewaters, the first three-way solenoid valve 312 and an a mouth, the second three-way solenoid valve 313 by A, enter capnograph 33 and nitrogen-oxide analyzer, 34 carries out CO 2Detect with NO concentration; System completes the first sampling box gaseous sample CO for the second time 2, the NO concentration analysis;
Step S11: center-controlling computer 1 is sent instruction by the industrial control configuration program, after gas circuit assignment of logical device 31 receives instruction, 3. state transfers the gas circuit logic to, the interior gas of sampling box 441 is by a b mouth and a c mouth of the first three-way solenoid valve 312, and the 4th c mouth and the 4th b mouth of the 3rd c mouth of the 3rd three-way solenoid valve 314 and the 3rd b mouth, the 4th three-way solenoid valve 315 enter greenhouse gases sample introduction instrument 35; Subsequently, the CH of gas equilibrium gas chromatograph 36 beginning analytical sampling case 441 interior second air sample after 20 seconds 4, CO 2And N 2O concentration; System completes the first sampling box gaseous sample CH for the second time 4, CO 2And N 2The O concentration analysis;
Step S12: center-controlling computer 1 is sent instruction by the industrial control configuration program, and A group the first sampling three-way solenoid valve AZ1 is closed in the gas collecting unit 32 of gas collecting analysis portion 3, opens B group the first sampling three-way solenoid valve BZ1, opens the second sampling channel; 4. gas circuit assignment of logical device 31 is in the gas circuit logic, the interior gas of sampling box 451 is organized the 2nd b mouth and the 2nd a mouth of a b mouth of the b mouth of the first sampling three-way solenoid valve BZ1 and c mouth, buncher 321, the cold-trap 323 that dewaters, the first three-way solenoid valve 312 and an a mouth, the second three-way solenoid valve 313 by B, enter capnograph 33 and nitrogen-oxide analyzer, 34 carries out CO 2Detect with NO concentration; System completes the second sampling box gaseous sample CO for the second time 2, the NO concentration analysis;
Step S13: center-controlling computer 1 is sent instruction by the industrial control configuration program, after gas circuit assignment of logical device 31 receives instruction, 3. gas circuit assignment of logical device state transfers the gas circuit logic to, the interior gas of sampling box 451 is by a b mouth and a c mouth of the first three-way solenoid valve 312, and the 4th c mouth and the 4th b mouth of the 3rd c mouth of the 3rd three-way solenoid valve 314 and the 3rd b mouth, the 4th three-way solenoid valve 315 enter greenhouse gases sample introduction instrument 35; Subsequently, the CH of gas equilibrium gas chromatograph 36 beginning analytical sampling case 451 interior second air sample after 20 seconds 4, CO 2And N 2O concentration; System completes the second sampling box gaseous sample CH for the second time 4, CO 2And N 2The O concentration analysis;
Step S14: center-controlling computer 1 is sent instruction by the industrial control configuration program, and B group the first sampling three-way solenoid valve BZ1 is closed in the gas collecting unit 32 of gas collecting analysis portion 3, opens C group the first sampling three-way solenoid valve CZ1, opens the 3rd sampling channel; 4. gas circuit assignment of logical device 31 is in the gas circuit logic, the interior gas of sampling box 461 is organized the 2nd b mouth and the 2nd a mouth of a b mouth of the b mouth of the first sampling three-way solenoid valve CZ1 and c mouth, buncher 321, the cold-trap 323 that dewaters, the first three-way solenoid valve 312 and an a mouth, the second three-way solenoid valve 313 by C, enter capnograph 33 and nitrogen-oxide analyzer, 34 carries out CO 2Detect with NO concentration; System completes the 3rd sampling box gaseous sample CO for the second time 2, the NO concentration analysis;
Step S15: center-controlling computer 1 is sent instruction by the industrial control configuration program, after gas circuit assignment of logical device 31 receives instruction, transfer the gas circuit logic to 3., the interior gas of sampling box 461 is by a b mouth and a c mouth of the first three-way solenoid valve 312, and the 4th c mouth and the 4th b mouth of the 3rd c mouth of the 3rd three-way solenoid valve 314 and the 3rd b mouth, the 4th three-way solenoid valve 315 enter greenhouse gases sample introduction instrument 35; Subsequently, the CH of gas equilibrium gas chromatograph 36 beginning analytical sampling case 461 interior second air sample after 20 seconds 4, CO 2And N 2O concentration; System completes the 3rd sampling box gaseous sample CH for the second time 4, CO 2And N 2The O concentration analysis;
Repeating step S10-S15, complete first, second, and third sampling box for the third time, the 4th time and the 5th gaseous sample analysis, complete the analysis of (comprising three calibrating gas, 5 collected specimens of each sampling box) of a round;
Then, center-controlling computer 1 is sent instruction by the industrial control configuration program, and the field control terminal 41 of sampling section 4 selects corresponding A group the first threeway Electromagnetic Control starting valve AQ1 to close, and sampling box 441 is opened; The field control terminal 42 of sampling section 4 selects corresponding B group the first threeway Electromagnetic Control starting valve BQ1 to close, and sampling box 451 is opened; The field control terminal 43 of sampling section 4 selects corresponding C group the first threeway Electromagnetic Control starting valve CQ1 to close, and sampling box 461 is opened; After gas circuit assignment of logical device 31 receives instruction, transfer the gas circuit logic to 5., system dewaters, and prepares to enter collection and the analysis of next one.
In second, third and four hour, the threeway Electromagnetic Control starting valve of corresponding unlatching and sampling three-way solenoid valve are AQ2, BQ2, CQ2, AZ2, BZ2, CZ2; AQ3, BQ3, CQ3, AZ3, BZ3, CZ3; AQ4, BQ4, CQ4, AZ4, BZ4 and CZ4, corresponding sampling box 442,452,462,443,453,463 and 444,454,464, collection is identical with first round with analytical procedure.All concentration datas send to the 3rd industrial control module 24 by gas collecting analysis portion 3 with voltage signal, enter center-controlling computer 1 storage with digital signal after digital-to-analog conversion; The environment weather parameter sends to the first industrial control module 22 by sampling section 4 in the current signal mode, is that digital signal enters center-controlling computer 1 storage through digital-to-analog conversion.
Five hour beginning second period repeats the circulation of first hour.So continuous circulation goes down, and completes 6 cycles every day, until observation and analysis work is complete.
Apparatus of the present invention have dropped into normal observation on Dong Cun farm, Yongji City, Shanxi Province.
The present invention has following advantage: applicable object of observation is wide, can be applicable to farmland, meadow, forest land; Continuously, high frequency, precision be high, can obtain simultaneously the valid data of multiple gases; Cabinet design can reduce the greenhouse effect of environment in case; Data is reliable continuously, has exempted the hard work of artificial collection.
The above; only be the embodiment in the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with the people of this technology in the disclosed technical scope of the present invention; can understand conversion or the replacement expected; all should be encompassed in of the present invention comprise scope within, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.

Claims (10)

1. a minimum gas gathers and analytic system automatically, it is characterized in that, comprises center-controlling computer, industrial control module group, sampling section and gas collection analysis section, wherein:
Center-controlling computer is industrial control computer, by the configuration software coding, generates and sends the industry control instruction of industry control instruction, gas circuit and gas collection analysis of the case lid of sampling section; The simulating signal that contains environment weather parameter and minimum gas concentration data that reception and storage industry control module group are sent;
the industrial control module group is connected with gas collection analysis section with center-controlling computer, sampling section respectively, the gas collecting analysis portion is connected with the pipeline of sampling section respectively, and the gas collecting analysis portion receives the gaseous sample that sampling section pipeline is carried, the industry control instruction of sampling section case lid, gas circuit and gas collection analysis that the industrial control module winding receives that center-controlling computer generates, receive the output of sampling section have an environment weather parameter current signal, the voltage signal with minimum gas concentration data of receiver gases collection analysis section output, wherein: the case lid of industrial control module group to sampling section, the switching value signal that voltage transitions generated and exported the case lid of controlling sampling section is carried out in gas circuit and gas collection analysis industry control instruction, the switching value signal that gas circuit assignment of logical signal and control gas collecting are analyzed, case lid that be used for to control sampling section opens and closes automatically according to the industry control instruction, be used for controlling the gaseous sample that the gas collecting analysis portion carries the pipeline of sampling section according to the industry control instruction gathers, be used for the gaseous sample concentration data of gas collecting analysis portion is carried out gas chromatography, NDIR (Non-Dispersive Infrared) and chemiluminescence analysis, the industrial control module group is processed the current signal with environment weather parameter of sampling section output, generates and export the simulating signal that contains the environment weather parameter, the industrial control module group has the gas concentration data voltage signal to gas collecting analysis portion output to be processed, and generates and export to contain the gas concentration data analog signal.
2. minimum gas as claimed in claim 1 gathers and analytic system automatically, it is characterized in that, described industrial control module group contains communication module, the first industrial control module, the second industrial control module and the 3rd industrial control module, wherein:
The first industrial control module is connected with sampling section, and the first industrial control module is according to the industry control instruction of sampling section case lid, generates and export to realize sampling section's case lid orderly close-down and the control signal of opening;
The gas collecting unit that has in the second industrial control module and gas collecting analysis portion is connected, and according to the industry control instruction of gas collecting, generates and exports the collection analysis that gaseous sample is carried out ten alternatives and control;
The gas circuit logic controller that has in the 3rd industrial control module and gas collecting analysis portion is connected, industry control instruction according to gas analysis, generate and export the control signal that described gas circuit logic controller is controlled, realize that gaseous sample enters each detecting instrument according to setting program;
Communication module respectively with the first industrial control module, the second industrial control module and the 3rd industrial control module parallel join, the communication module receiving center is controlled the industry control instruction of the industrial control configuration program transmission of computing machine, gives the first industrial control module, the second industrial control module and the 3rd industrial control module with the industry control command; Communication module receives the simulating signal of the first industrial control module and the transmission of the 3rd industrial control module and is transferred to center-controlling computer; The first industrial control module receives the industry control instruction and is converted to the switching value signal and flows to sampling section, is used for controlling the switching of the case lid of sampling section, receives the current signal of sampling section output and generate simulating signal to send to communication module; The second industrial control module receives the industry control instruction and is converted to the switching value signal and sends to the gas collecting analysis portion, is used for controlling gaseous sample and selects and gather; The 3rd industrial control module receives the industry control instruction and is converted to the switching value signal and sends to the gas collecting analysis portion, is used for controlling the concentration analysis of gaseous sample, and the voltage signal that receiver gases collection analysis section generates also is converted to simulating signal and sends to communication module.
3. minimum gas as claimed in claim 2 gathers and analytic system automatically, it is characterized in that, described gas collecting analysis portion is comprised of gas circuit assignment of logical device, gas collecting unit, capnograph, nitrogen-oxide analyzer,, greenhouse gases sample introduction instrument and gas chromatograph;
The gas collecting unit is connected with the second industrial control module, receives the switching value signal of the second industrial control module output, is used for controlling the selection in gaseous sample collection source;
Gas circuit assignment of logical device is connected with the 3rd industrial control module, receive the switching value signal of the 3rd industrial control module output, generate and export the control signal that gaseous sample is switched between capnograph, nitrogen-oxide analyzer,, greenhouse gases sample introduction instrument and gas chromatograph;
Capnograph, nitrogen-oxide analyzer, and gas chromatograph are connected with gas circuit assignment of logical device, capnograph, nitrogen-oxide analyzer, and gas chromatograph receive switch-over control signal, the concentration data that capnograph, nitrogen-oxide analyzer, and gas chromatograph generated and exported gaseous sample sends to the 3rd industrial control module with voltage signal, completes the analysis to gaseous sample concentration.
4. minimum gas as claimed in claim 3 gathers and analytic system automatically, it is characterized in that, described gas circuit assignment of logical device is comprised of two-way electromagnetic valve, the first three-way solenoid valve, the second three-way solenoid valve, the 3rd three-way solenoid valve and five solenoid valves of the 4th three-way solenoid valve, five solenoid valves of gas circuit assignment of logical device are completed Standard Gases and are entered greenhouse gases sample introduction instrument, CO by the on off state that programmed control realizes 2Analyser and NO XThe analyser pipeline-cleaning, gas chromatographic analysis N 2O, CH 4, CO 2Standard Gases, gaseous sample enter greenhouse gases sample introduction instrument, CO 2Analyser and NO XAnalyser emptying, gas chromatographic analysis gaseous sample, CO 2Analyser and NO XAnalyser detects next gaseous sample and the pipeline five kinds of logic states that dewater; Wherein: the first injection port of the first three-way solenoid valve is connected with the cold-trap that dewaters, the first normal opening of the first three-way solenoid valve is connected with the second normal opening of the second three-way solenoid valve, and the first normally closed port of the first three-way solenoid valve is connected with the 3rd normally closed port of the 3rd three-way solenoid valve; The second injection port of the second three-way solenoid valve is connected with capnograph, the emptying of the second normally closed port; Capnograph and nitrogen-oxide analyzer, series winding, matter flow controller and flowmeter are connected in the outlet of nitrogen-oxide analyzer; The 3rd normal opening of the 3rd three-way solenoid valve is connected with calibrating gas, and the 3rd air intake opening of the 3rd three-way solenoid valve is connected with the 4th normally closed port of the 4th three-way solenoid valve; The 4th air intake opening of the 4th three-way solenoid valve is connected with greenhouse gases sample introduction instrument, the 4th emptying of normal opening; Two-way electromagnetic valve is connected with the bottom of the cold-trap that dewaters, and discharges the water in the cold-trap that dewaters during unlatching.
5. minimum gas as claimed in claim 4 gathers and analytic system automatically, it is characterized in that,
Also comprise, the mechanical part of sampling section by many groups sampling box, organize threeway Electromagnetic Control starting valve, air compressor, driving cylinder and high drive gas circuit pipeline more and form; Drive cylinder and be contained in sampling box both sides, be connected with threeway Electromagnetic Control starting valve by driving gas circuit pipeline; The normal opening of each threeway Electromagnetic Control starting valve is connected with the lower air intake opening of corresponding driving cylinder; The air intake opening of each threeway Electromagnetic Control starting valve all is connected with the gas outlet of air compressor; The normally closed port of each threeway Electromagnetic Control starting valve is connected with the enterprising gas port of corresponding driving cylinder; Air compressor is connected with each threeway Electromagnetic Control starting valve by driving gas circuit pipeline.
6. minimum gas as claimed in claim 5 gathers and analytic system automatically, it is characterized in that, described many group sampling boxes comprise: A group sampling box, B group sampling box and C group sampling box; Described system also comprises the circuit part of sampling section, and this circuit part contains: organize the field control terminal more; Described many groups field control terminal comprises: A organizes field control terminal, B group field control terminal and C and organizes the field control terminal;
Described A group field control terminal, B group field control terminal and C group field control terminal respectively with the first industrial control module parallel join, A group field control terminal, B group field control terminal and C group field control terminal receive the switching signal that the first industrial control module sends, and the switch that is used for controlling many groups threeway Electromagnetic Control starting valve of sampling section changes the pressurized air that drives cylinder and flows to; To control the opening and closing of each sampling box case lid in described A group sampling box, B group sampling box and C group sampling box; A group field control terminal, B group field control terminal and C organize the field control terminal and also receive the measurement current signal that sampling box environmental parameter detector is beamed back, and are transported to the first industrial control module in the industrial control module group.
7. minimum gas as claimed in claim 5 gathers and analytic system automatically, it is characterized in that, described many group sampling boxes comprise: A group sampling box, B group sampling box and C group sampling box; The gas collecting unit is comprised of many groups of sampling three-way solenoid valves, buncher, aspiration pump and the cold-traps that dewater, and many group sampling three-way solenoid valves comprise: A group sampling three-way solenoid valve, B group sampling three-way solenoid valve and C group sampling three-way solenoid valve; The normal opening of each sampling three-way solenoid valve of many group sampling three-way solenoid valves is emptying, and the normally closed port of each sampling three-way solenoid valve all is connected with buncher; The injection port of A group sampling three-way solenoid valve is connected with A group sampling box respectively; The injection port of B group sampling three-way solenoid valve is connected with B group sampling box respectively; The injection port of C group sampling three-way solenoid valve is connected with C group sampling box respectively; Aspiration pump air intake opening end is connected with buncher, and the gas outlet end is connected with the cold-trap that dewaters.
8. minimum gas as claimed in claim 6 gathers and analytic system automatically, it is characterized in that, described each sampling box is comprised of balance pipe, case lid, casing, driving cylinder, base, four supports, temperature sensor, humidity sensor, thief hatch and mixed gas fans, wherein, balance pipe is positioned on casing, in four fillet welding of base, four downward supports of cutting edge is arranged; The three-dimensional side frames of casing is welded by angle steel; Casing and case lid hinge links, casing is connected that rotating shaft connects with base, and sampling box is when opening, and case lid is opened the while casing and is opened as rotating shaft on one side take base, forms scissors mouth shape opening between casing and base; Cabinet wall is equipped with temperature sensor, humidity sensor, thief hatch and mixed gas fan, and two drive cylinder and are divided in casing both sides, and the driving gas that drives cylinder is provided by air compressor.
9. minimum gas as claimed in claim 8 gathers and analytic system automatically, and it is characterized in that: casing has the transparent thin board of five faces, and transparent thin board is selected makrolon material.
10. automatic collection and the analytical approach of the minimum gas of the automatic collection of right to use requirement 7 described minimum gas and analytic system, is characterized in that, comprises that step is as follows:
Step S1: center-controlling computer is sent instruction by the industrial control configuration program, the gas collecting unit selection A group first sampling three-way solenoid valve of gas collecting analysis portion is opened, the first sampling channel that unlatching is comprised of A group the first sampling three-way solenoid valve and pipeline, aspiration pump are sent into the gas in A group first sampling box of correspondence the gas circuit assignment of logical device of gas collecting analysis portion; The gas circuit logic of gas circuit assignment of logical device is in pipeline-cleaning, Standard Gases sample introduction state, in sampling box gas by pipeline, capnograph, nitrogen-oxide analyzer,, matter flow controller at last from the drain outflow system of flowmeter; Simultaneously, calibrating gas enters greenhouse gases sample introduction instrument and gas chromatograph, and system completes pipeline-cleaning and first Standard Gases sample introduction;
Step S2: center-controlling computer is sent instruction by the industrial control configuration program, and the field control terminal of sampling section selects corresponding A group the first threeway Electromagnetic Control starting valve to open, and closes the first sampling box; Gas circuit assignment of logical device receiving center is controlled the instruction that computing machine sends, and the gas circuit logic transfers analytical gas sample NO and CO to 2In the first sampling box, gas enters capnograph and nitrogen-oxide analyzer, by gas circuit assignment of logical device; Simultaneously, gas chromatograph is completed calibrating gas CH 4, CO 2And N 2The concentration analysis of O; System completes the first sampling box NO, the CO of gaseous sample for the first time 2Concentration analysis, first calibrating gas CH 4, CO 2And N 2The O concentration analysis;
Step S3: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, state transferred analytical gas sample CH to 4, CO 2And N 2O； In the first sampling box, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the first sampling box gaseous sample CH for the first time 4, CO 2And N 2The O concentration analysis;
Step S4: center-controlling computer is sent instruction by the industrial control configuration program, A group the first sampling three-way solenoid valve is closed in the gas collecting unit of gas collecting analysis portion, open B group the first sampling three-way solenoid valve, open the second sampling channel that is formed by B group the first sampling three-way solenoid valve and pipeline; The gas circuit logic of gas circuit assignment of logical device is in pipeline-cleaning, Standard Gases sample introduction state, and in the second sampling box, gas is by pipeline, capnograph, nitrogen-oxide analyzer,, the last outflow system of matter flow controller; Simultaneously, calibrating gas enters greenhouse gases sample introduction instrument and gas chromatograph, and system completes pipeline-cleaning and second Standard Gases sample introduction;
Step S5: center-controlling computer is sent instruction by the industrial control configuration program, and the field control terminal of sampling section selects corresponding B group the second threeway Electromagnetic Control starting valve to open, and closes the second sampling box; Gas circuit assignment of logical device receiving center is controlled the instruction that computing machine sends, and the gas circuit logic transfers analytical gas sample NO and CO to 2In the second sampling box, gas enters capnograph and nitrogen-oxide analyzer, by the gas circuit logic controller; Simultaneously, gas chromatograph is completed calibrating gas CH 4, CO 2And N 2The concentration analysis of O; System completes the second sampling box NO, the CO of gaseous sample for the first time 2Concentration analysis, second calibrating gas CH 4, CO 2And N 2The O concentration analysis;
Step S6: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, the gas circuit logic transferred analytical gas sample CH to 4, CO 2And N 2O； In the second sampling box, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the second sampling box gaseous sample CH for the first time 4, CO 2And N 2The O concentration analysis;
Step S7: center-controlling computer is sent instruction by the industrial control configuration program, B group the first sampling three-way solenoid valve is closed in the gas collecting unit of gas collecting analysis portion, open C group the first sampling three-way solenoid valve, open the 3rd sampling channel that is formed by C group the first sampling three-way solenoid valve and pipeline; The gas circuit logic of gas circuit assignment of logical device is in pipeline-cleaning, Standard Gases sample introduction state, and in the 3rd sampling box, gas is by pipeline, capnograph, nitrogen-oxide analyzer,, the last outflow system of matter flow controller; Simultaneously, calibrating gas enters greenhouse gases sample introduction instrument and gas chromatograph, and system completes pipeline-cleaning and the 3rd Standard Gases sample introduction;
Step S8: center-controlling computer is sent instruction by the industrial control configuration program, and the field control terminal of sampling section selects corresponding C group the 3rd threeway Electromagnetic Control starting valve to open, and closes the 3rd sampling box; Gas circuit assignment of logical device receiving center is controlled the instruction that computing machine sends, and the gas circuit logic transfers analytical gas sample NO and CO to 2In the 3rd sampling box, gas enters capnograph and nitrogen-oxide analyzer, by gas circuit assignment of logical device; Simultaneously, gas chromatograph is completed calibrating gas CH 4, CO 2And N 2The concentration analysis of O, system completes the 3rd sampling box CO of gaseous sample for the first time 2, the NO concentration analysis, the 3rd calibrating gas CH 4, CO 2And N 2The O concentration analysis;
Step S9: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, the state of gas circuit assignment of logical device transferred analytical gas sample CH to 4, CO 2And N 2O； In the 3rd sampling box, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the 3rd sampling box gaseous sample CH for the first time 4, CO 2And N 2The O concentration analysis;
Step S10: center-controlling computer is sent instruction by the industrial control configuration program, and C group the first sampling three-way solenoid valve is closed in the gas collecting unit of gas collecting analysis portion, opens A group the first sampling three-way solenoid valve, opens the first sampling channel; The gas circuit logic of gas circuit assignment of logical device is in gas chromatographic analysis gaseous sample, CO 2Analyser and NO XIn analyser detected state, the first sampling box, gas carries out CO by capnograph, nitrogen-oxide analyzer, 2Detect with NO concentration; System completes the first sampling box gaseous sample CO for the second time 2, the NO concentration analysis;
Step S11: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, gas circuit assignment of logical device state transferred analytical gas sample CH to 4, CO 2And N 2O； In case, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the first sampling box gaseous sample CH for the second time 4, CO 2And N 2The O concentration analysis;
Step S12: center-controlling computer is sent instruction by the industrial control configuration program, and A group the first sampling three-way solenoid valve is closed in the gas collecting unit of gas collecting analysis portion, opens B group the first sampling three-way solenoid valve, opens the second sampling channel; The gas circuit logic of gas circuit assignment of logical device is in gas chromatographic analysis gaseous sample, CO 2Analyser and NO XIn analyser detected state, the second sampling box, gas carries out CO by capnograph, nitrogen-oxide analyzer, 2Detect with NO concentration; System completes the second sampling box gaseous sample CO for the second time 2, the NO concentration analysis;
Step S13: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, gas circuit assignment of logical device state transferred analytical gas sample CH to 4, CO 2And N 2O； In the second sampling box, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the second sampling box gaseous sample CH for the second time 4, CO 2And N 2The O concentration analysis;
Step S14: center-controlling computer is sent instruction by the industrial control configuration program, and B group the first sampling three-way solenoid valve is closed in the gas collecting unit of gas collecting analysis portion, opens C group the first sampling three-way solenoid valve, opens the 3rd sampling channel; The gas circuit logic of gas circuit assignment of logical device is in gas chromatographic analysis gaseous sample, CO 2Analyser and NO XIn analyser detected state, the 3rd sampling box, gas carries out CO by capnograph, nitrogen-oxide analyzer, 2Detect with NO concentration; System completes the 3rd sampling box gaseous sample CO for the second time 2, the NO concentration analysis;
Step S15: center-controlling computer is sent instruction by the industrial control configuration program, and after gas circuit assignment of logical device received instruction, the state of gas circuit assignment of logical device transferred analytical gas sample CH to 4, CO 2And N 2O； In case, gas enters greenhouse gases sample introduction instrument and gas chromatograph through gas circuit assignment of logical device, analytical gas sample CH 4, CO 2And N 2O concentration; System completes the 3rd sampling box gaseous sample CH for the second time 4, CO 2And N 2The O concentration analysis;
Repeating step S10-S15, complete the first sampling box, the second sampling box and the 3rd sampling box for the third time, the 4th time and the 5th gaseous sample analysis, complete the analysis of three calibrating gas of a round, 5 collected specimens of each sampling box; All concentration datas send to the 3rd industrial control module by the gas collecting analysis portion with voltage signal, enter the center-controlling computer storage with digital signal after digital-to-analog conversion; The environment weather parameter sends to the first industrial control module by sampling section in the current signal mode, is that digital signal enters the center-controlling computer storage through digital-to-analog conversion.
CN2009102367156A 2009-10-28 2009-10-28 System and method for automatically acquiring and analyzing trace gas Expired - Fee Related CN102053164B (en)

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