CN100561195C - The non-disperse infrared spectrum determination method and the device that are suitable for wide environmental temperature range - Google Patents
The non-disperse infrared spectrum determination method and the device that are suitable for wide environmental temperature range Download PDFInfo
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- CN100561195C CN100561195C CN 200710045770 CN200710045770A CN100561195C CN 100561195 C CN100561195 C CN 100561195C CN 200710045770 CN200710045770 CN 200710045770 CN 200710045770 A CN200710045770 A CN 200710045770A CN 100561195 C CN100561195 C CN 100561195C
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Abstract
The present invention relates to be suitable for the non-disperse infrared spectrum determination method and the device of wide environmental temperature range, it is characterized in that its method is: sample gas inlet pipe, sample gas are gone out air intake opening, gas outlet and the power access end that pipe and DC24V power supply are connected respectively to the non-disperse infrared spectrum determination device; Output line is connected to the signal output module of non-disperse infrared spectrum determination device; Opening power is sampled and is measured; Sampling and measurement are divided into two the tunnel: the first via is the sample gas circuit, and detected sample gas is entered by air intake opening, through behind the absorption cell, discharges by the gas outlet; The second the tunnel is the signal acquisition process road, earlier infrared light supply is carried out electrical modulation by digital signal processing module, infrared light supply after modulated passes the absorption cell back that is partially absorbed and arrives polynary thermoelectric pile infrared detector, the micro voltage signal of polynary thermoelectric pile infrared detector is exported to simulating signal and is amplified and to pass to that digital signal processing module is gathered and computing after the conditioning module, exports to external unit through signal output module at last.Advantage of the present invention is can be-40 ℃ to+70 ℃ work.
Description
Technical field
The present invention relates to a kind of non-disperse infrared spectrum determination method and device that is suitable for wide environmental temperature range, relate in particular to non-disperse infrared spectrum determination method and the device of gaseous hydrocarbon component in wide environmental temperature range in a kind of Process of Oil Well Drilling, belong to gaseous hydrocarbon component measuring method technical field.
Background technology
Former in the market non-disperse infrared spectrum determination instrument as shown in Figure 1, form by digital signal processing module 1, absorption cell 2, infrared light supply 5, polynary thermoelectric pile infrared detector 6, simulating signal amplification conditioning module 7 and signal output module 8, the specific implementation flow process is divided into two the tunnel substantially: the first via is the sample gas circuit, detected sample gas is entered by air intake opening 3, through behind the absorption cell 2, discharge by gas outlet 4; The second the tunnel is the signal acquisition process road, earlier carry out electrical modulation by 1 pair of infrared light supply of digital signal processing module 5, infrared light supply 5 after modulated sends the infrared light that frequency is 2HZ, infrared light passes absorption cell 2 back that is partially absorbed and arrives polynary thermoelectric pile infrared detector 6, the micro voltage signal of polynary thermoelectric pile infrared detector 6 is exported to simulating signal and is amplified conditioning module 7, pass to digital signal processing module 1 by simulating signal amplification conditioning module 7 again and gather and computing, export to external unit through signal output module 8 at last.
Such non-disperse infrared spectrum determination device only can be operated under 0 to+50 ℃ the ambient temperature conditions, and this obviously can only meet the requirement of laboratory work, and can not use at the comparatively abominable field condition of some conditions.This makes this method of non-disperse infrared spectrum determination restricted greatly in practice such as commercial production scene, oil (gas) field exploration.
Summary of the invention
The purpose of this invention is to provide a kind of non-disperse infrared spectrum determination method and device that can be suitable for-40 ℃ to+70 ℃ of wide environmental temperature range work.
For realizing above purpose, technical scheme of the present invention provides a kind of non-disperse infrared spectrum determination device, comprise digital signal processing module, absorption cell, infrared light supply, simulating signal is amplified conditioning module and signal output module, be provided with air intake opening and gas outlet at the absorption cell two ends, digital signal processing module is connected with infrared light supply, simulating signal is amplified conditioning module and is connected with signal output module by digital signal processing module, it is characterized in that, on absorption cell, be provided with temperature sensor, polynary thermoelectric pile infrared detector amplifies conditioning module with simulating signal and is connected, be provided with heating arrangement at absorption cell, temperature sensor is connected with the thermostatic control module respectively with heating arrangement.
Described heating arrangement is heating rod, heater strip, heating tape or heating film.
Be suitable for the non-disperse infrared spectrum determination method of wide environmental temperature range, it is characterized in that, adopt the non-disperse infrared spectrum determination device to carry out the assay of gaseous hydrocarbon infrared absorption component, its method is:
The first step. the sample gas inlet pipe is connected to the air intake opening of non-disperse infrared spectrum determination device, again sample gas is gone out the gas outlet that pipe is connected to the non-disperse infrared spectrum determination device;
Second step. the DC24V power supply is connected to the power access end of non-disperse infrared spectrum determination device;
The 3rd step. RS232 or 4-20mA output line are connected to the signal output interface of non-disperse infrared spectrum determination device;
The 4th step. open the DC24V power supply, switch on after 30 minutes, sample and measure;
The 5th step. sampling and measurement are divided into two the tunnel: the first via is the sample gas circuit, and detected sample gas is entered by air intake opening, through behind the absorption cell, discharges by the gas outlet; The second the tunnel is the signal acquisition process road, earlier infrared light supply is carried out electrical modulation by digital signal processing module, infrared light supply after modulated sends the infrared light that frequency is 2HZ, infrared light passes the absorption cell back that is partially absorbed and arrives polynary thermoelectric pile infrared detector, the micro voltage signal of polynary thermoelectric pile infrared detector is exported to simulating signal and is amplified conditioning module, amplify conditioning module by simulating signal again and pass to that digital signal processing module is gathered and computing, pass to external unit through signal output module conversion back by output interface at last.
The used non-disperse infrared spectrum determination device of the present invention has increased the thermostatic control road, the temperature value of absorption cell passes to the thermostatic control module through temperature sensor, the thermostatic control module provides control signal to heating arrangement, thereby realizes absorption cell is carried out 60 ℃ to the 80 ℃ thermostatic controls in the scope; Signal acquisition process adopts resistant to elevated temperatures polynary thermoelectric pile infrared detector, operating ambient temperature can reach 100 ℃, the former absorption cell fixed point thermostatic control mode (can make polynary thermoelectric pile infrared detector floated by temperature influences) has guaranteed-40 ℃ under+70 ℃ environment temperature, the accuracy of infrared output signal, stability and reliability, the high temperature of absorption cell has also well overcome the influence of sample gas humidity simultaneously.The latter's the resistant to elevated temperatures polynary thermoelectric pile infrared detector of selecting for use then is the prerequisite that the inventive method realizes.
Advantage of the present invention is:
(1) can under-40 ℃ to+70 ℃ wide temperature environment, work;
(2) measuring accuracy is not subjected to the influence of tested gas high humility;
(3) can carry out gaseous hydrocarbon component measures;
(4) can realize online fast measuring;
(5) produce according to the standard transducer module.
Description of drawings
Fig. 1 is former gaseous hydrocarbon component measurement mechanism structural representation;
Fig. 2 is a non-disperse infrared spectrum determination apparatus structure synoptic diagram;
Fig. 3 is the non-disperse infrared spectrum determination method synoptic diagram that is suitable for wide environmental temperature range;
Fig. 4 is sampling and measuring method synoptic diagram.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment
As shown in Figure 2, be non-disperse infrared spectrum determination apparatus structure synoptic diagram, described non-disperse infrared spectrum determination device 13 amplifies conditioning module 7, signal output module 8, thermostatic control module 9, temperature sensor 10, heating arrangement 11 and polynary thermoelectric pile infrared detector 12 by digital signal processing module 1, absorption cell 2, infrared light supply 5, simulating signal and forms.
Be provided with air intake opening 3 and gas outlet 4 at absorption cell 2 two ends, digital signal processing module 1 is connected with infrared light supply 5, simulating signal is amplified conditioning module 7 and is connected with signal output module 8 by digital signal processing module 1, on absorption cell 2, be provided with temperature sensor 10, polynary thermoelectric pile infrared detector 12 amplifies conditioning module 7 with simulating signal and is connected, at absorption cell 2 heating arrangement 11 is installed, temperature sensor 10 is connected with thermostatic control module 9 respectively with heating arrangement 11.
Described heating arrangement 11 can be heating rod, heater strip, heating tape or heating film, and the present invention selects heating rod for use.
All parts are the commercial outsourcing product.
As shown in Figure 3, for being suitable for the non-disperse infrared spectrum determination method synoptic diagram of wide environmental temperature range, adopt the non-disperse infrared spectrum determination device to carry out the assay of gaseous hydrocarbon infrared absorption component, its method is:
The first step. the sample gas inlet pipe is connected to the air intake opening 3 of non-disperse infrared spectrum determination device 13, again sample gas is gone out the gas outlet 4 that pipe is connected to non-disperse infrared spectrum determination device 13;
Second step. the DC24V power supply is connected to the power access end 15 of non-disperse infrared spectrum determination device 13; The
The 3rd step. RS232 or 4-20mA output line are connected to the signal output interface 16 of non-disperse infrared spectrum determination device 13;
The 4th step. open the DC24V power supply, switch on after 30 minutes, sample and measure;
The 5th step. sampling and measurement are divided into two the tunnel: the first via is the sample gas circuit, and detected sample gas is entered by air intake opening 3, through behind the absorption cell 2, discharges by gas outlet 4; The second the tunnel is the signal acquisition process road, earlier carry out electrical modulation by 1 pair of infrared light supply of digital signal processing module 5, infrared light supply 5 after modulated sends the infrared light that frequency is 2HZ, infrared light passes absorption cell 2 back that is partially absorbed and arrives polynary thermoelectric pile infrared detector 12, the micro voltage signal of polynary thermoelectric pile infrared detector 12 is exported to simulating signal and is amplified conditioning module 7, passing to digital signal processing module 1 by simulating signal amplification conditioning module 7 again gathers and computing, pass to external unit through signal output module 8 conversion backs by output interface 16 at last, as shown in Figure 4.
The temperature value of absorption cell 2 passes to thermostatic control module 9 through temperature sensor 10, and thermostatic control module 9 provides control signal through pid algorithm to heating rod 11, thereby realizes absorption cell 2 is carried out 60 ℃ to the 80 ℃ thermostatic controls in the scope.
Claims (3)
1. non-disperse infrared spectrum determination device that is suitable for wide environmental temperature range, comprise digital signal processing module (1), absorption cell (2), infrared light supply (5), simulating signal is amplified conditioning module (7) and signal output module (8), be provided with air intake opening (3) and gas outlet (4) at absorption cell (2) two ends, digital signal processing module (1) is connected with infrared light supply (5), simulating signal is amplified conditioning module (7) and is connected with signal output module (8) by digital signal processing module (1), it is characterized in that, on absorption cell (2), be provided with temperature sensor (10), polynary thermoelectric pile infrared detector (12) amplifies conditioning module (7) with simulating signal and is connected, be provided with heating arrangement (11) on absorption cell (2), temperature sensor (10) is connected with thermostatic control module (9) respectively with heating arrangement (11).
2. a kind of non-disperse infrared spectrum determination device that is suitable for wide environmental temperature range according to claim 1 is characterized in that described heating arrangement (11) is heating rod, heater strip, heating tape or heating film.
3. adopt the described a kind of assay method that is suitable for the non-disperse infrared spectrum determination device of wide environmental temperature range of claim 1, it is characterized in that, adopt the non-disperse infrared spectrum determination device to carry out the assay of gaseous hydrocarbon infrared absorption component, its method is:
The first step. the sample gas inlet pipe is connected to the air intake opening (3) of non-disperse infrared spectrum determination device (13), again sample gas is gone out the gas outlet (4) that pipe is connected to non-disperse infrared spectrum determination device (13);
Second step. the DC24V power supply is connected to the power access end (15) of non-disperse infrared spectrum determination device (13);
The 3rd step. RS232 or 4-20mA output line are connected to the signal output interface (16) of non-disperse infrared spectrum determination device (13);
The 4th step. open the DC24V power supply, switch on after 30 minutes, sample and measure;
The 5th step. sampling and measurement are divided into two the tunnel: the first via is the sample gas circuit, and detected sample gas is entered by air intake opening (3), behind absorption cell (2), discharges by gas outlet (4); The second the tunnel is the signal acquisition process road, earlier infrared light supply (5) is carried out electrical modulation by digital signal processing module (1), infrared light supply after modulated (5) sends the infrared light that frequency is 2Hz, infrared light passes absorption cell (2) back that is partially absorbed and arrives polynary thermoelectric pile infrared detector (12), the micro voltage signal of polynary thermoelectric pile infrared detector (12) is exported to simulating signal and is amplified conditioning module (7), pass to digital signal processing module (1) by simulating signal amplification conditioning module (7) again and gather and computing, pass through signal output module (8) conversion back at last and pass to external unit by output interface (16).
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| CN100561195C true CN100561195C (en) | 2009-11-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103323397B (en) * | 2013-05-28 | 2015-08-26 | 佛山市南华仪器股份有限公司 | Air chamber pipe assembly |
| CN103674882A (en) * | 2013-12-24 | 2014-03-26 | 北京航天测控技术有限公司 | Non-dispersive infrared light gas detection system |
| CN104034699B (en) * | 2014-06-19 | 2016-08-17 | 同济大学 | A kind of automatic detection gathers the device of sample transmission rate |
| CN104122224A (en) * | 2014-08-13 | 2014-10-29 | 成都君凌科创科技有限公司 | High-precision non-dispersion infrared ray gas sensor |
| CN106596244B (en) * | 2016-12-14 | 2023-06-23 | 宁海德宝立新材料有限公司 | Temperature-control sample stage |
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Non-Patent Citations (2)
| Title |
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| 基于非分散红外( NDIR)原理的煤矿甲烷检测仪. 刘敏等.仪表技术与传感器，第3期. 2007 |
| 基于非分散红外( NDIR)原理的煤矿甲烷检测仪. 刘敏等.仪表技术与传感器，第3期. 2007 * |
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Owner name: SHANGHAI SHENKAI PETROLEUM SCI-TECH CO., LTD. SHAN Free format text: FORMER OWNER: SHANGHAI SHENKAI PETROLEUM SCI-TECH CO., LTD. |
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Effective date of registration: 20110520 Address after: 201114 Minhang District Pu Xing Road, No. 1769, Shanghai Co-patentee after: Shanghai Shenkai Petroleum Sci-Tech Co., Ltd. Patentee after: Shanghai Shenkai Petroleum & Chemical Equipment Corporation Ltd. Co-patentee after: Shanghai Shenkai Petroleum Equipment Co., Ltd. Address before: 201114 Minhang District Pu Xing Road, No. 1769, Shanghai Co-patentee before: Shanghai Shenkai Petroleum Sci-Tech Co., Ltd. Patentee before: Shanghai Shenkai Petroleum & Chemical Equipment Corporation Ltd. |
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