CN205538658U - Gaseous concentration measurement system in ultraviolet gas analysis appearance - Google Patents
Gaseous concentration measurement system in ultraviolet gas analysis appearance Download PDFInfo
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- CN205538658U CN205538658U CN201620025199.8U CN201620025199U CN205538658U CN 205538658 U CN205538658 U CN 205538658U CN 201620025199 U CN201620025199 U CN 201620025199U CN 205538658 U CN205538658 U CN 205538658U
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Abstract
The utility model relates to a gaseous concentration measurement system in ultraviolet gas analysis appearance belongs to smoke detection's technical field, the problem of the technique is solved for: the utility model provides a higher gaseous concentration measurement system in ultraviolet gas analysis appearance of measurement accuracy, the technical scheme who adopts does: a gaseous concentration measurement system in ultraviolet gas analysis appearance, includes: airtight gas chamber and light source, airtight gas chamber's one end is provided with optical fiber sensor, and optical fiber sensor links to each other with the spectrum appearance, last temperature sensor, oxygen sensor, outlet duct and the intake pipe of being provided with of airtight gas chamber, control circuit board includes: the master controller to and the temperature signal who links to each other with the master controller respectively takes care of and acquisition circuit, oxygen signal conditioning show with acquisition circuit, light control circuit, pipeline control circuit, key recognition circuit, communication interface circuit, demonstration screen display that control circuit, acquisition circuit 0 gather control circuit.
Description
Technical field
Gas concentration measurement system in this utility model one ultraviolet gas analyzer, belongs to the technical field of flue gas inspection.
Background technology
At present, the most existing gas analyser mainly utilizes ultraviolet fluorescence method and tunable laser method, ultraviolet fluorescence method can be used to measure sulfur dioxide, its principle is that the ultraviolet lighting near 190 ~ 230 nm is when being mapped to tested gas, sulfur dioxide molecule absorbs the energy of ultraviolet light, and molecule is excited to send fluorescence when high level returns ground state；N2, O2 in air does not causes " fluorescent quenching effect ", the SO2 of excited state mainly returns ground state by fluorescence process, utilizing photomultiplier tube to receive the fluorescence sent out, it is the highest that the monitoring sensitivity to SO2 is sent out in Ultraluminescence, and fluorescent intensity size can reflect the concentration of sulfur dioxide；The method can monitor the low concentration SO 2 of the ppb order of magnitude, and dynamic range and the linearity are fine simultaneously, is therefore used for quality of air environment monitoring, but is applied when flue gas monitoring, needs to be equipped with dilution method sampler, and system is extremely complex.
Tunable laser (Tunable Laser), refer to can change continuously within the specific limits the laser instrument of laser output wavelength, this laser instrument of many uses, can be used for spectroscopy, photochemistry, medical science, biology, integrated optics, pollution monitoring, semi-conducting material processing, information processing and communicates；Due to laser wavelength wide coverage, intensity is big, spectral line is narrow, may be used for the detection of multiple gases, typically has two kinds of working methods: a kind of back scattering being to utilize tested gas, obtain dusty gas distribution spatially, based on differential absorption lidar technology, another kind is the mean concentration utilizing reflector to obtain on light path direction, and transmission light meets langbobier law with launching light, the advantage of the method is almost to measure all gas, responds fast precision high.Shortcoming is that the cost of the tunable laser of middle infrared is the highest, and gas with various detection need to be equipped with different light source, and the absorption line strengths that the laser instrument of near infrared region produces is relatively low, is unfavorable for measuring.
Utility model content
This utility model overcomes the deficiency that prior art exists, technical problem to be solved to be: provide gas concentration measurement system in a kind of ultraviolet gas analyzer that a kind of certainty of measurement is higher.
In order to solve above-mentioned technical problem, the technical solution adopted in the utility model is: gas concentration measurement system in a kind of ultraviolet gas analyzer, including: it is used for depositing the sealed gas chamber of gas and the light source for emitting parallel light in air chamber, one end of described sealed gas chamber is provided with the Fibre Optical Sensor for receiving directional light, described Fibre Optical Sensor is connected with spectrogrph, it is provided with temperature sensor on described sealed gas chamber, oxygen sensor, escape pipe and air inlet pipe, described temperature sensor, oxygen sensor is all connected with described control circuit plate with spectrogrph, described control circuit plate is connected with light source also by light source driving circuit plate；Described control circuit plate includes: main controller, and the temperature signal regulation being connected with main controller respectively shows control circuit, spectroscopic acquisition control circuit with Acquisition Circuit, oxygen signal conditioning with Acquisition Circuit, control circuit for light source, pipeline control circuit, recognition by pressing keys circuit, communication interface circuit, display screen；Described temperature sensor, oxygen sensor, light source driving circuit plate, spectrogrph are connected with Acquisition Circuit, control circuit for light source, spectroscopic acquisition control circuit with Acquisition Circuit, oxygen signal conditioning with described temperature signal regulation respectively.
Preferably, described air inlet pipe being provided with electromagnetic valve, described electromagnetic valve is connected with air intake duct and sample gas air inlet pipe, described air intake duct is provided with sampling pump, described electromagnetic valve and sampling pump and is all connected with described pipeline control circuit.
Described system also includes that HMI human-computer interaction interface, described HMI human-computer interaction interface are provided with display screen and button, and described display screen is connected with display screen display control circuit, and described button is connected with recognition by pressing keys circuit.
Described control circuit plate also includes current output circuit and switching signal output circuit, described control circuit plate also includes power-switching circuit, described power-switching circuit is connected with described main controller, the model of described main controller is STM32F103ZET6, and described communication interface circuit includes: RS232 interface circuit and RS485 interface circuit.
This utility model compared with prior art has the advantages that
1, in this utility model, by temperature sensor, oxygen sensor can the environmental data of Real-time Collection sealed gas chamber, the spectral signal of tested gas in can gathering sealed gas chamber by spectrogrph, described temperature sensor, oxygen sensor and spectrogrph are all connected with control circuit plate, described control circuit plate processes the spectral signal of spectrometer collection, the environmental data of sealed gas chamber, and the spectral signal received is converted into gas concentration signal；This utility model can eliminate the environmental factors impact on the system of measurement, and certainty of measurement is high, system stability is good.
2, this utility model, by the communication unit of control circuit plate, can be connected with HMI human-computer interaction interface, facilitate staff to the observation of measurement data and operation, practical.
Accompanying drawing explanation
The utility model is described in more detail below in conjunction with the accompanying drawings.
Fig. 1 is structural representation of the present utility model；
Fig. 2 is electrical block diagram of the present utility model；
Fig. 3 is oxygen signal conditioning and the circuit theory diagrams of Acquisition Circuit in the present embodiment；
Fig. 4 is temperature signal regulation and the circuit theory diagrams of Acquisition Circuit in the present embodiment；
In figure: 1 is sealed gas chamber, 2 is light source, 3 is Fibre Optical Sensor, 4 is spectrogrph, 5 is temperature sensor, 6 is oxygen sensor, 7 is escape pipe, 8 is air inlet pipe, 9 is control circuit plate, 10 is main controller, 11 is temperature signal regulation and Acquisition Circuit, 12 is oxygen signal conditioning and Acquisition Circuit, 13 is control circuit for light source, 14 is pipeline control circuit, 15 is recognition by pressing keys circuit, 16 is communication interface circuit, 17 show control circuit for display screen, 18 is spectroscopic acquisition control circuit, 19 is light source driving circuit plate, 20 is electromagnetic valve, 21 is sampling pump, 22 is current output circuit, 23 is switching signal output circuit, 24 is power-switching circuit, 25 is HMI human-computer interaction interface, 26 is display screen, 27 is button.
Detailed description of the invention
As shown in Figures 1 to 4, gas concentration measurement system in a kind of ultraviolet gas analyzer, including: it is used for depositing the sealed gas chamber 1 of gas and the light source 2 for emitting parallel light in air chamber, one end of described sealed gas chamber 1 is provided with the Fibre Optical Sensor 3 for receiving directional light, described Fibre Optical Sensor 3 is connected with spectrogrph 4, it is provided with temperature sensor 5 on described sealed gas chamber 1, oxygen sensor 6, escape pipe 7 and air inlet pipe 8, described temperature sensor 5, oxygen sensor 6 is all connected with described control circuit plate 9 with spectrogrph 4, described control circuit plate 9 is connected with light source 2 also by light source driving circuit plate 19；Described control circuit plate 9 includes: main controller 10, and the temperature signal regulation being connected with main controller 10 respectively shows control circuit 17, spectroscopic acquisition control circuit 18 with Acquisition Circuit 11, oxygen signal conditioning with Acquisition Circuit 12, control circuit for light source 13, pipeline control circuit 14, recognition by pressing keys circuit 15, communication interface circuit 16, display screen；Described temperature sensor 5, oxygen sensor 6, light source driving circuit plate 19 are connected with Acquisition Circuit 12, control circuit for light source 13 with Acquisition Circuit 11, oxygen signal conditioning with described temperature signal regulation respectively.
In this utility model, it is provided with electromagnetic valve 20 in described air inlet pipe 8, described electromagnetic valve 20 is connected with air intake duct and sample gas air inlet pipe, and described air intake duct is provided with sampling pump 21, and described electromagnetic valve 20 is all connected with described pipeline control circuit 14 with sampling pump 21；Described system also includes that HMI human-computer interaction interface 25, described HMI human-computer interaction interface 25 are provided with display screen 26 and button 27, and described display screen 26 is connected with display screen display control circuit 17, and described button 27 is connected with recognition by pressing keys circuit 15；Described control circuit plate 9 also includes current output circuit 22 and switching signal output circuit 23；The model of described main controller 10 is STM32F103ZET6.
Specifically, described light source 2, light source driving circuit plate 19, spectrogrph 4 and Fibre Optical Sensor 3 constitute spectral measurement part, described escape pipe 7, air inlet pipe 8, air intake duct, sample gas air inlet pipe, electromagnetic valve 20 and sampling pump 21 constitute air sampling part, described air sampling part is responsible for sample gas and air are inputted gas sealed gas chamber 1, measures for spectral measurement part and analyzes；Further, when electromagnetic valve 20 controls into air, sampling pump 21 is by air suction air chamber, analyzed by spectrogrph 4 under the irradiation of light source 2 and obtain zero point absorption spectrum, then electromagnetic valve 20 controls to enter sample gas, now, spectrogrph 4 will obtain the absorption spectrum of sample gas, by communication interface circuit 16, data is passed to main control unit and carries out the computing of gas concentration；Simultaneously, the environmental data of the sealed gas chamber 1 of collection is sent to main control unit and carries out data process by temperature sensor 5 and oxygen sensor 6, and environmental data and gas concentration data are transferred to HMI human-computer interaction interface 25 by communication interface circuit 16 by main control unit to be carried out data and show.
In the present embodiment, the resistance value that temperature sensor 5 is exported by described temperature signal regulation with Acquisition Circuit 11, being converted to voltage signal through R/V conversion, signal amplifies through conditioning, then transmits the signal to main controller 10 by the ADC interface of main controller 10 and processes；The weak voltage signals that oxygen sensor 6 is exported by the conditioning of described oxygen signal and Acquisition Circuit 12 amplifies through conditioning, then transmits the signal to main controller 10 by the ADC interface of main controller 10 and processes；Described control circuit for light source 13 passes through closedown and the unlatching of the I/O Interface Controller light source of main controller 10；Described pipeline control circuit 14 passes through control realization sampling pump 21 and the open and close of electromagnetic valve 20 of main controller 10 switch amount；Described recognition by pressing keys circuit 15 is for the identification to key-press status；Described communication interface circuit 16 includes RS232 interface and RS485 interface, it is achieved with the digital communication of external equipment；Described display screen display control circuit 17 is used for realizing display screen 26 and is communicated with main controller 10 by RS232 interface, and main controller 10 controls the renewal of display screen display content by this control circuit；Described spectroscopic acquisition control circuit 18 realizes the data between spectrogrph and main controller 10 by RS232 interface and exchanges, and the data of exchange include the control information of spectrogrph, the spectral information etc. of spectrogrph；Described current output circuit 22 realizes the inside DA of main controller 10 and sample information is exported with the form of analog quantity, these voltages are converted into the current signal output of 4 ~ 20mA by specific works process: the information such as the gas concentration main controller 10 sampling processing crossed, temperature are exported by voltage form；Described switching signal output circuit 23 is used for realizing main controller 10 and controls output 24V switching value, allows it possess outer control function；In this utility model, described control circuit plate 9 includes also including: power-switching circuit 24, and the 24V voltage signal that Switching Power Supply exports is converted to the internal various power supply signals used of control circuit plate 9 by described power-switching circuit 24, including 12V, 5V, 3.3V etc..
nullIn the present embodiment，Described oxygen signal conditioning with the circuit structure of Acquisition Circuit 12 is: include current amplifier U11，It is connected with one end of resistance R13 behind one end of the signal negative terminal-IN connecting resistance R11 of described current amplifier U11，The other end ground connection of described resistance R11，The other end of described resistance R13 is also connected with one end of resistance R14 after meeting the signal output part OUT of current amplifier U11，The other end of described resistance R14 and after connecing the negative pole of diode D11 with the negative pole of diode D12、Oxygen signal conditioning is connected with output terminals A DC_OXY of Acquisition Circuit 12，The positive pole of described diode D11 is connected with the 3.3V power output end of power-switching circuit 24，The plus earth of described diode D12，Signal anode+the IN of described current amplifier U11 exports single V_OXY by resistance R12 with the signal of oxygen sensor 6 and is connected，The power supply negative terminal V-ground connection of described current amplifier U11，It is connected with the 12V power output end of power-switching circuit 24 behind one end of the power positive end shunt-wound capacitance C11 of described current amplifier U11，The other end ground connection of described electric capacity C11.
nullDescribed temperature signal regulation with the circuit structure of Acquisition Circuit 11 is: include current amplifier U22，It is connected with one end of resistance R26 behind one end of the signal negative terminal-IN connecting resistance R28 of described current amplifier U22，It is connected with the signal output part PT of temperature sensor 5 after the other end of described resistance R26 one end of connecting resistance R24，With the negative pole of controlled source of stable pressure U21 after the other end of described resistance R24 one end of connecting resistance R25、One end of resistance R22、One end of resistance R21 is connected，The other end of described resistance R21 is connected with the 12V power output end of described power-switching circuit 24，After the other end of described resistance R22 one end of connecting resistance R23, the reference edge with controlled source of stable pressure U21 is connected，The other end of described resistance R23 ground connection after connecing the positive pole of controlled source of stable pressure U21，It is connected with one end of resistance R210 after the other end of described resistance R25 one end of connecting resistance R27，After the other end of described resistance R27 one end of connecting resistance R29, the signal anode+IN with current amplifier U22 is connected，The other end of described resistance R210、The other end of resistance R29、The equal ground connection of power supply negative terminal of current amplifier U22；After the other end of described resistance R28 one end of connecting resistance R211, the signal output part OUT with described current amplifier U22 is connected, the other end of described resistance R211 and after connecing the negative pole of diode D21 with the negative pole of diode D22, temperature signal regulation is connected with the outfan V_TEMP of Acquisition Circuit 11, the positive pole of described diode D22 is connected with the 3.3V power output end of power-switching circuit 24, the plus earth of described diode D21, it is connected with the 12V power output end of power-switching circuit 24 behind one end of the power positive end V+ shunt-wound capacitance C21 of described current amplifier U22, the other end ground connection of described electric capacity C21.
In the present embodiment, sampling pump 21 can choose small size, ultra-low noise, wide temperature range, life-span length, the gas samping pump of good stability, ensure to fall below ultimate attainment by sampling pump 21 to the error that gas concentration inverting brings, same electromagnetic valve 20 is also adopted by quality product, effectively reduces electromagnetic interference；Simultaneously, light source 2 part passes through emitting ultraviolet light to sealed gas chamber 1, absorption spectra measurement for gas provides prerequisite, the performance of light source 2 directly determines analysis precision, stability and life-span, this utility model has selected a high stability, long-life deuterium lamp light source, its operation wavelength can cover multiple gases absorption spectra, spectrum is mild, optical noise is little, the energy of ultraviolet portion is higher, meet very much the absorption characteristic at ultraviolet band analyzing multiple gases, substantially increase certainty of measurement of the present utility model and stability simultaneously.
To sum up, this utility model has substantive distinguishing features and progress, above in conjunction with accompanying drawing, embodiment of the present utility model is explained in detail, but this utility model is not limited to above-described embodiment, in the ken that those of ordinary skill in the art are possessed, it is also possible on the premise of without departing from this utility model objective, various changes can be made.
Claims (7)
1. gas concentration measurement system in a ultraviolet gas analyzer, including: for depositing the sealed gas chamber (1) of gas and for the light source (2) of emitting parallel light in air chamber, it is characterized in that: one end of described sealed gas chamber (1) is provided with the Fibre Optical Sensor (3) for receiving directional light, described Fibre Optical Sensor (3) is connected with spectrogrph (4), temperature sensor (5) it is provided with on described sealed gas chamber (1), oxygen sensor (6), escape pipe (7) and air inlet pipe (8), described temperature sensor (5), oxygen sensor (6) is all connected with control circuit plate (9) with spectrogrph (4), described control circuit plate (9) is connected with light source (2) also by light source driving circuit plate (19)；
Described control circuit plate (9) including: main controller (10), and the temperature signal regulation being connected with main controller (10) respectively shows control circuit (17), spectroscopic acquisition control circuit (18) with Acquisition Circuit (11), oxygen signal conditioning with Acquisition Circuit (12), control circuit for light source (13), pipeline control circuit (14), recognition by pressing keys circuit (15), communication interface circuit (16), display screen；
Described temperature sensor (5), oxygen sensor (6), light source driving circuit plate (19), spectrogrph (4) are connected with Acquisition Circuit (12), control circuit for light source (13), spectroscopic acquisition control circuit (18) with Acquisition Circuit (11), oxygen signal conditioning with described temperature signal regulation respectively.
Gas concentration measurement system in a kind of ultraviolet gas analyzer the most according to claim 1, it is characterized in that: in described air inlet pipe (8), be provided with electromagnetic valve (20), described electromagnetic valve (20) is connected with air intake duct and sample gas air inlet pipe, it is provided with sampling pump (21), described electromagnetic valve (20) and sampling pump (21) on described air intake duct to be all connected with described pipeline control circuit (14).
Gas concentration measurement system in a kind of ultraviolet gas analyzer the most according to claim 1, it is characterized in that: described system also includes HMI human-computer interaction interface (25), described HMI human-computer interaction interface (25) is provided with display screen (26) and button (27), described display screen (26) is connected with display screen display control circuit (17), and described button (27) is connected with recognition by pressing keys circuit (15).
Gas concentration measurement system in a kind of ultraviolet gas analyzer the most according to claim 1, it is characterised in that: described control circuit plate (9) also includes current output circuit (22) and switching signal output circuit (23).
Gas concentration measurement system in a kind of ultraviolet gas analyzer the most according to claim 1, it is characterised in that: described control circuit plate (9) also includes that power-switching circuit (24), described power-switching circuit (24) are connected with described main controller (10).
Gas concentration measurement system in a kind of ultraviolet gas analyzer the most according to claim 1, it is characterised in that: the model of described main controller (10) is STM32F103ZET6.
Gas concentration measurement system in a kind of ultraviolet gas analyzer the most according to claim 1, it is characterised in that: described communication interface circuit (16) including: RS232 interface circuit and RS485 interface circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620025199.8U CN205538658U (en) | 2016-01-12 | 2016-01-12 | Gaseous concentration measurement system in ultraviolet gas analysis appearance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620025199.8U CN205538658U (en) | 2016-01-12 | 2016-01-12 | Gaseous concentration measurement system in ultraviolet gas analysis appearance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466877A (en) * | 2016-01-12 | 2016-04-06 | 中绿环保科技股份有限公司 | Gas concentration measuring system in ultraviolet gas analyzer |
| WO2020147561A1 (en) * | 2019-01-17 | 2020-07-23 | 深圳市太赫兹科技创新研究院有限公司 | Spectrometer and controller thereof |
-
2016
- 2016-01-12 CN CN201620025199.8U patent/CN205538658U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466877A (en) * | 2016-01-12 | 2016-04-06 | 中绿环保科技股份有限公司 | Gas concentration measuring system in ultraviolet gas analyzer |
| CN105466877B (en) * | 2016-01-12 | 2018-11-23 | 中绿环保科技股份有限公司 | Gas concentration measurement system in ultraviolet gas analyzer |
| WO2020147561A1 (en) * | 2019-01-17 | 2020-07-23 | 深圳市太赫兹科技创新研究院有限公司 | Spectrometer and controller thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20190112 |