CN205643238U - Compound stench gas sensor detection device - Google Patents
Compound stench gas sensor detection device Download PDFInfo
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- CN205643238U CN205643238U CN201620506792.4U CN201620506792U CN205643238U CN 205643238 U CN205643238 U CN 205643238U CN 201620506792 U CN201620506792 U CN 201620506792U CN 205643238 U CN205643238 U CN 205643238U
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Abstract
The utility model discloses a compound stench gas sensor detection device. The device is including the unit that admits air, sampling pond unit and processing unit, admit air the unit with the sampling pond unit connection, sampling pond unit is connected with processing unit, the unit that admits air includes two gas bombs, a mass flow meter and a three -way valve, sampling pond unit includes at least one gas sampling module, diaphragm pump, sampling pond unit shielded wire and power cord. The unit that admits air is used for providing the stable quilt of the velocity of flow and surveys background gas gaseous and that have the effect of washing to guarantee to be surveyed fast switch over gaseous and background gas. Sampling pond unit is inside place the sensor that is used for detecting the foul gas and with sensor assorted signal conditioning circuit board, realize drawing and the analysis the stench composition of complicacy. Processing unit carries out further processing with the signal of sensor collection, reachs the gas reaction curve, assesss out foul gas concentration grade at last.
Description
Technical field
This utility model relates to environmental monitoring and control field, is specially the compound foul gas sensor detecting device of one.
Background technology
Stench is the general name of various abnormal flavour abnormal smells from the patient, and foul gas is of a great variety, and the odorant of current national standard monitoring preventing and treating has: Carbon bisulfide, methyl disulfide, hydrogen sulfide, trimethylamine, styrene, ammonia, methanthiol and methyl sulfide eight kinds.Along with expanding economy, the environmental consciousness of people constantly strengthens, stench is the most increasingly subject to people's attention as a kind of environmental pollution, need stench is detected, odor pollution to being likely to result in is analyzed, and practical measures are proposed, to ensure that people have a comfortable air ambient.
Traditional stench detection research one is " instrumental measurement (constituent concentration explicit representation) "；Another kind is " olfactometry ".Front kind of means mainly utilize the most quantization stench of the instrument such as spectrophotometer or gas chromatograph, and its precision is higher, but in real life, stench complicated component is changeable, and therefore single component measurement practical significance is the most notable.Latter method is then using the olfactory sensation of people as according to evaluating the uncomfortable degree that people is caused by odour intensity.Olfactometry experimental technique is simple, workable, but because only relying on the sensorium of people as judging basis, by force, long-term measurement can produce olfactory fatigue to subjective dependency.
Application No. 201210280808.0 discloses a kind of gas sensor device and uses the method for measurement of concentration of gas sensor, it uses single gas sensor to detect specific gas composition, limited by kind of sensor, the gas componant that can detect is the most limited, and does not have real-time.
Utility model content
For the deficiencies in the prior art, the technical problem that this utility model intends to solve is to provide a kind of compound foul gas sensor detecting device.This device includes air admission unit, sampling pool unit and processing unit；Air admission unit is for providing the tested gas of flow speed stability and having a background gas of flushing action, and ensures being switched fast of tested gas and background gas.The internal sensor placed for detecting foul gas of sampling pool unit and the signal conditioning circuit plate matched with sensor, it is achieved extraction and the analysis to complicated odor pollutant.The signal of sensor acquisition is further processed by processing unit, draws gas reaction curve, finally assesses foul gas concentration scale.
This utility model solves the technical scheme of described technical problem and is to provide a kind of compound foul gas sensor detecting device, it is characterised in that described device includes air admission unit, sampling pool unit and processing unit；Described air admission unit is connected with sampling pool unit；Described sampling pool unit is connected with processing unit；
Described air admission unit includes two gas bombs, a mass flowmenter and a three-way valve；Said two gas bomb by two connecting tubes each with the two of three-way valve corresponding connections of import；Said two gas bomb is respectively provided with tested gas and background gas；Article two, connecting tube is each sequentially installed with air relief valve and electromagnetic valve；The outlet of described three-way valve is connected with mass flowmenter；
Described sampling pool unit include at least one gas sampling module, membrane pump, for realizing sampling pool unit shielding line that communication is connected with processing unit and for realizing the power line of electrical connection with processing unit；Connected by connecting tube between each gas sampling module；Described mass flowmenter is connected with first in gas sampling module by connecting tube；Gas sampling modular structure is identical, all includes gas cell device, sensor and signal conditioning circuit plate；Described signal conditioning circuit plate includes power supply wire casing and communication wire casing；Described signal conditioning circuit plate is threadeded with gas cell device；Described sensor is positioned in gas cell device；Described sensor is connected with electrochemical signals modulate circuit plate；Last in gas sampling module is connected with membrane pump by connecting tube；
Described processing unit includes source control unit, industrial computer and processing unit shielding line；Described source control unit is connected with industrial computer by processing unit shielding line.
Compared with prior art, this utility model has the beneficial effects that:
1, this device uses modularized design, premised on eight kinds of odorants of the main monitoring of country at present, realize the detection to the complex effluvium material in environment, and finally provide malodorous grades, detectable concentration scope is from tens ppb to hundreds of ppm, measurement concentration range is extensive, it is possible to realize qualitative and quantitative detection.
2, air admission unit is for providing the tested gas of flow speed stability and have the background gas of flushing action, and ensures being switched fast of tested gas and background gas.
3, sampling pool unit uses modularized design, can the number of swap modules as required, provide selectivity for measuring compound foul gas composition.By the way of utilizing multiple sensors composition gas sensor array, it is possible to foul gas composition complicated in environment is detected simultaneously, compares traditional single component algoscopy and improve multiformity and the popularity of measurement.
4, gas cell device inwall is coated with silanization coating to improve surface smoothness, reduces gas absorption residual quantity, thus greatly reduces on-line checking interference factor, significantly improves the accuracy of foul gas test data.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram that this utility model is combined a kind of embodiment of foul gas sensor detecting device；
Fig. 2 is the structural representation that this utility model is combined the gas sampling module of a kind of embodiment of foul gas sensor detecting device；
Fig. 3 is the first electrochemical module exploded perspective view that this utility model is combined a kind of embodiment of foul gas sensor detecting device；(in figure: 1, air admission unit；2, sampling pool unit；3, processing unit；11, gas bomb；12, air relief valve；13, mass flowmenter；14, electromagnetic valve；15, three-way valve；21, sampling pool unit shielding line；22, power line；23, membrane pump；24, the second electrochemical module；25, the first electrochemical module；26, the first metal-oxide module；27, PID module；28, the second metal-oxide module；31, source control unit；32, industrial computer；33, processing unit shielding line；251, gas cell device；252, sensor；253, signal conditioning circuit plate；2531, power supply wire casing；2532, communication wire casing)
Detailed description of the invention
Technical scheme in this utility model embodiment will be carried out clear, complete description below, it is clear that described embodiment is a part of embodiment of the present utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained on the premise of not making creative work, broadly fall into the scope of this utility model protection.
This utility model provides a kind of compound foul gas sensor detecting device (being called for short device, see Fig. 1-3), it is characterised in that described device includes air admission unit 1, sampling pool unit 2 and processing unit 3；Described air admission unit 1 is connected with sampling pool unit 2；Described sampling pool unit 2 is connected with processing unit 3；
Described air admission unit 1 includes 11, mass flowmenter 13 of two gas bombs and a three-way valve 15；Said two gas bomb 11 by two connecting tubes each with the two of three-way valve 15 corresponding connections of import；Being respectively provided with tested gas and background gas in said two gas bomb 11, background gas is used for rinsing, and in the present embodiment, background gas is nitrogen；Article two, connecting tube being each sequentially installed with air relief valve 12 and electromagnetic valve 14, air relief valve 12, for reducing the pressure that gas bomb produces, prevents it from impacting gas flowing, and electromagnetic valve 14 is used for switching background gas and gas passage to be measured；The outlet of described three-way valve 15 is connected with mass flowmenter 13；The model of described mass flowmenter 13 is CS200D, and range is 1500ml/L；
Described sampling pool unit 2 includes that (the present embodiment is five gas sampling modules at least one gas sampling module, is first electrochemical module the 25, first metal-oxide module 26, PID module the 27, second metal-oxide module 28 and the second electrochemical module 24 respectively；The gas componant that first electrochemical module 25 is measured is mainly ammonia, and concentration range is 0-200ppm；The gas componant that first metal-oxide module 26 is measured includes medicated cigarette gas, hydrogen, ethanol, methane and CO etc., and concentration range is 0-60ppm；The gas componant that PID module 27 is measured is volatile organic matter, and concentration range is 0-50ppm；The gas componant that second metal-oxide module 28 is measured mainly includes toluene, ethanol, H2S、NH3And H2Deng, concentration range is 0-100ppm；The gas componant that second electrochemical module 24 is measured is mainly hydrogen sulfide, and concentration range is 0-200ppm), membrane pump 23, for realizing sampling pool unit shielding line 21 that communication is connected with processing unit 3 and for realizing, with processing unit 3, the power line 22 that is electrically connected；Connected by connecting tube between each gas sampling module；Described mass flowmenter 13 is connected with first in gas sampling module by connecting tube；Gas sampling modular structure is identical, all including gas cell device, supporting sensor and supporting signal conditioning circuit plate, the connected mode of gas sampling module is as a example by the first electrochemical module 25 (seeing Fig. 3): described first electrochemical module 25 includes gas cell device 251, sensor 252 and signal conditioning circuit plate 253；Described signal conditioning circuit plate 253 includes power supply wire casing 2531 and communication wire casing 2532；Described signal conditioning circuit plate 253 is threadeded with gas cell device 251；Described sensor 252 is positioned in gas cell device 251；Described sensor 252 is connected with electrochemical signals modulate circuit plate 253；Described communication wire casing 2532 is connected for the communication realized between gas sampling module with processing unit 3, between adjacent gas sampling module；Described power supply wire casing 2531 is for realizing the electrical connection between gas sampling module and processing unit 3, between adjacent gas sampling module；Last in gas sampling module is connected with membrane pump 23 by connecting tube；The effect of membrane pump 23 is placed on the end of gas sampling module and extracts background gas or tested gas with the form of negative pressure so that it is flow through each gas sampling module uniformly and stably；
Described processing unit 3 includes source control unit 31, industrial computer 32 and processing unit shielding line 33；Described processing unit 3 is connected with sampling pool unit 2 communication by sampling pool unit shielding line 21；Described processing unit 3 is electrically connected with sampling pool unit 2 by power line 22；Described source control unit 31 is connected with industrial computer 32 by processing unit shielding line 33；Described sampling pool unit 2 is sent to source control unit 31 by processing unit shielding line 33 after the sensor signal of collection is carried out preliminary treatment；Source control unit 31 is as the hinge connecting sampling pool unit 2 and industrial computer 32, using STC15F2K60S2 single-chip microcomputer as control core, the data of the gas sampling module sent by sampling pool unit 2 are integrated and are processed, and transfer data to industrial computer 32 by processing unit shielding line 33 after receiving the related command that industrial computer 32 sends；Industrial computer 32 has the function of integrated computer, show the gas reaction curve of gas sampling module the most in real time, on the other hand utilize the mode identification technology in neutral net, multi-sensor information fusion technology to be analyzed the data that source control unit 31 sends processing, finally draw the malodorous grades of compound foul gas composition.
Described connecting tube is made up of teflon hose.
Described gas cell device 251 inwall is coated with silanization coating.
This utility model is combined the operation principle of foul gas sensor detecting device and workflow is: be placed in odor pollution source region by compound foul gas sensor detecting device, collecting in two gas bombs 11 respectively by gas and the background gas of pollution source area, the flow velocity of mass flowmenter 13 is adjusted to a suitable flow velocity the most stable.Device one-time detection process follows the air inlet flow process of background gas-tested gas-background gas.Background gas uses noble gas, will not react with sensor.The purpose of background gas is poured in detection when starting be to be on the one hand purgative gas chamber device and sensor, is on the other hand the state making sensor enter a kind of pre-reaction in advance so that it is when reacting with foul gas, state is more stable.
After compound foul gas sensor detecting device powers on, the gas bomb 11 first loading background gas is opened, its air relief valve 12 action, and for reducing the pressure that gas bomb 11 produces, electromagnetic valve 14 is opened, and background gas enters three-way valve 15 by connecting tube.Background gas flows out from three-way valve 15 outlet, flows through mass flowmenter 13 and enters sampling pool unit 2 by connecting tube.What background gas initially entered is the gas cell device 251 of the first electrochemical module 25 of sampling pool unit 2, react with sensor 252 in the cavity of gas cell device 251, the signal of reaction is sent to signal conditioning circuit plate 253 and carries out preliminary treatment by electrochemical sensor 252, then being sent to source control unit 31 by sampling pool unit shielding line 21, data are sent to industrial computer 32 by processing unit shielding line 33 after source control unit 31 carries out integration process and are analyzed, process and show.Background gas is noble gas, does not reacts with sensor, is therefore shown that straight line on industrial computer 32.Background gas enters the first metal-oxide module 26 from the first electrochemical module 25 through connecting tube, carry out the course of reaction identical with the first electrochemical module 25, background gas sequentially enters again PID module the 27, second metal-oxide module the 28, second electrochemical module 24 afterwards, flow out from the second electrochemical module 24, one end of membrane pump 23 is entered through connecting tube, membrane pump 23 is placed on the end of gas sampling module makes it flow through each gas sampling module uniformly and stably with the form extraction background gas of negative pressure, and last background gas flows out from the other end of membrane pump 23.So far the air inlet of a background gas, sampling and processing procedure are completed.Sensor, after pre-reaction, has basically reached a kind of steady statue.
After background gas once circulates, the gas bomb 11 loading background gas is closed, and the gas bomb 11 loading polluter foul gas is opened, the action of corresponding air relief valve 12, and electromagnetic valve 14 is opened, and tested gas flows out and starts one-time detection flow process.Its air inlet, sampling, handling process and the process being passed through background gas are identical.It is emphasized that five sensors can produce response to tested gas, response signal is sent to present rising (decline) response curve on industrial computer 32 after processing unit 3 is analyzed processing by sampling pool unit shielding line 21.
After tested gas once circulates, the gas bomb 11 loading polluter foul gas is closed, the gas bomb loading background gas is opened again, and background gas flows out and starts to be cleaned rinsing to sensor, gas cell device, gas connection pipe, and its air inlet flow process is same as described above.It is emphasized that in the cyclic process of current background gas, shown by industrial computer 32 it is and the response curve of tested gas opposite trend, until plateau when making it revert to initial, industrial computer 32 utilizes the mode identification technology in neutral net, multi-sensor information fusion technology to be analyzed the data that source control unit 31 sends processing simultaneously, obtains final foul gas response curve.This curve is analyzed contrast with the data in data base, thus draws the composition of compound foul gas, gas concentration and malodorous grades.So far, complete the most complete detection process, so circulate, it is achieved the detection to the foul gas of pollution source area.
This utility model is not addressed part and is applicable to prior art.
Claims (4)
1. a compound foul gas sensor detecting device, it is characterised in that described device includes air admission unit, sampling pool unit and processing unit；Described air admission unit is connected with sampling pool unit；Described sampling pool unit is connected with processing unit；
Described air admission unit includes two gas bombs, a mass flowmenter and a three-way valve；Said two gas bomb by two connecting tubes each with the two of three-way valve corresponding connections of import；Said two gas bomb is respectively provided with tested gas and background gas；Article two, connecting tube is each sequentially installed with air relief valve and electromagnetic valve；The outlet of described three-way valve is connected with mass flowmenter；
Described sampling pool unit include at least one gas sampling module, membrane pump, for realizing sampling pool unit shielding line that communication is connected with processing unit and for realizing the power line of electrical connection with processing unit；Connected by connecting tube between each gas sampling module；Described mass flowmenter is connected with first in gas sampling module by connecting tube；Gas sampling modular structure is identical, all includes gas cell device, sensor and signal conditioning circuit plate；Described signal conditioning circuit plate includes power supply wire casing and communication wire casing；Described signal conditioning circuit plate is threadeded with gas cell device；Described sensor is positioned in gas cell device；Described sensor is connected with electrochemical signals modulate circuit plate；Last in gas sampling module is connected with membrane pump by connecting tube；
Described processing unit includes source control unit, industrial computer and processing unit shielding line；Described source control unit is connected with industrial computer by processing unit shielding line.
Compound foul gas sensor detecting device the most according to claim 1, it is characterised in that the model of described mass flowmenter is CS200D.
Compound foul gas sensor detecting device the most according to claim 1, it is characterised in that described connecting tube is made up of teflon hose.
Compound foul gas sensor detecting device the most according to claim 1, it is characterised in that described gas cell device inwall is coated with silanization coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620506792.4U CN205643238U (en) | 2016-05-28 | 2016-05-28 | Compound stench gas sensor detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620506792.4U CN205643238U (en) | 2016-05-28 | 2016-05-28 | Compound stench gas sensor detection device |
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| CN205643238U true CN205643238U (en) | 2016-10-12 |
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| CN201620506792.4U Expired - Fee Related CN205643238U (en) | 2016-05-28 | 2016-05-28 | Compound stench gas sensor detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784802A (en) * | 2016-05-28 | 2016-07-20 | 河北工业大学 | Composite foul gas sensor detecting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784802A (en) * | 2016-05-28 | 2016-07-20 | 河北工业大学 | Composite foul gas sensor detecting device |
| CN105784802B (en) * | 2016-05-28 | 2019-03-05 | 河北工业大学 | A kind of compound foul gas sensor detecting device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 |
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| CF01 | Termination of patent right due to non-payment of annual fee |