CN102323380B - Carbon monoxide gas calibrating device and method - Google Patents
Carbon monoxide gas calibrating device and method Download PDFInfo
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- CN102323380B CN102323380B CN201110144411.4A CN201110144411A CN102323380B CN 102323380 B CN102323380 B CN 102323380B CN 201110144411 A CN201110144411 A CN 201110144411A CN 102323380 B CN102323380 B CN 102323380B
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Abstract
The invention discloses a carbon monoxide gas calibrating device and method. A box body is sequentially separated into a carbon monoxide producing chamber, a calibrating chamber and a carbon dioxide producing chamber by using partition plates from left to right; the calibrating chamber is internally provided with a carbon monoxide sensor and a control circuit board; the uppermost part in the carbon monomer producing chamber is provided with a separating funnel filled with formic acid, the formic acid enters a reaction flask through the separating funnel and reacts with concentrated sulfuric acid in the reaction flask to generate carbon monomer gas, the carbon monomer gas is introduced to the calibrating chamber, a heating box is arranged in the carbon dioxide producing chamber, an electric heating wire is arranged in the heating box and sodium bicarbonate solid powder is placed in the heating box, the electric heating wire is used for heating the sodium bicarbonate solid powder to react for generating carbon dioxide gas, the carbon dioxide gas is introduced to the calibrating chamber, a single chip microcomputer of the control circuit board controls the concentration of the gas to realize the calibration; and the carbon monoxide gas calibrating device has the advantages of simple structure, low cost, improved detection and calibration precision and capability of calibrating carbon monoxide with any concentration.
Description
Technical field
The present invention relates to a kind of caliberating device and scaling method of CO gas, can demarcate the carbon monoxide of any concentration.
Background technology
In coal gas, be carbon monoxide to the most harmful composition of human body, it is the prerequisite of safety in production that carbonomonoxide concentration in environment is measured quickly and accurately.Carbonmonoxide detector is the instrument of carbonomonoxide concentration in the accurate Fast Measurement environment of a kind of energy, and in the time that concentration reaches predefined alarming value, send sound and light alarm and remind operating personnel to process in time, thereby avoid the generation of accident, therefore in use to keep good working order be vital to carbonmonoxide detector.The core component of carbonmonoxide detector is an oxidizing gas carbon sensor, and the precision of an oxidizing gas carbon sensor and sensitivity directly affect the duty of detector.Therefore, CO gas sensor all will be demarcated before using, timing signal needs again to use the Standard CO of variable concentrations, conventional scaling method has: the one,, directly buying Standard CO demarcates, this method cost is higher, need to buy the Standard Gases of a large amount of variable concentrations; The 2nd,, demarcate by Demarcate Gas platform, calibrating table is connected to respectively to carbon monoxide gas tank and the gas tank (as nitrogen, carbon dioxide etc.) that fills other stabilizing gases, reach the object of demarcating any concentration carbon monoxide by controlling the flow of two kinds of gases, in the time that the carbonomonoxide concentration value in calibrating table reaches calibration value, close two ends gas tank valve.In the time that calibration value increases, open carbon monoxide gas tank valve, while reaching calibration value, close; In the time that calibration value reduces, open stabilizing gas gas tank valve, the carbon monoxide in calibrating table is diluted, while reaching calibration value, close.The weak point of this scaling method is:
1, gas tank volume ratio is larger, transports, carries inconvenience, and carbon monoxide belongs to flammable explosive gas, dangerous property in transportation;
2, operation, use inconvenience, need manual-lock valve while reaching calibration value, cannot reach automatic control;
3, canned carbon monoxide and other stabilizing gas high expensives.
Summary of the invention
The deficiency of demarcating for existing CO gas, the object of this invention is to provide a kind of simple in structure, low cost, high precision, easy to operate, the CO gas caliberating device that can realize automatic control; Another object of the present invention is to provide the scaling method of this caliberating device, the carbon monoxide of easy, any concentration of Fast Calibration.
For achieving the above object, the technical scheme that CO gas caliberating device of the present invention adopts is: have a casing, casing is carbon monoxide air chamber processed, demarcation chamber, the producing carbon dioxide chamber being separated by with dividing plate from left to right successively; Demarcating on the leading flank of chamber is LCD display and supervisory keyboard, demarcates indoor have carbon monoxide transducer and control circuit board; Topmost in carbon monoxide air chamber processed is the separating funnel that fills formic acid, the bottom of separating funnel is provided with manually-operated gate and the second solenoid valve, the end opening of separating funnel is formic acid communication port, formic acid communication port stretches in the airtight reaction bulb that fills the concentrated sulphuric acid, reaction bulb is placed in the heating bottle that fills water, and heating bottle bottom is provided with temperature sensor and the second heating wire; Reaction bulb is communicated with and is demarcated the upper left carbon monoxide air intake opening in chamber by glass wireway, and wireway is provided with the first solenoid valve; Described producing carbon dioxide is provided with heating cabinet in chamber, the first heating wire is set in heating cabinet and places sodium bicarbonate solid powder, and heating cabinet is communicated with the carbon dioxide mouth of demarcating top, right side, chamber by conduit, the 3rd solenoid valve is set in the middle of conduit; Described control circuit board is provided with single-chip microcomputer, signal amplifier and A/D converter, and carbon monoxide transducer is connected to signal amplifier input end, and signal amplifier output terminal connects A/D converter; Output terminal, supervisory keyboard, LCD display and first, second, third solenoid valve of temperature sensor, A/D converter, be connected respectively different I/O port of single-chip microcomputer; Between first, second heating wire and single-chip microcomputer, be connected in series respectively first, second electromagnetic switch.
The technical scheme that the scaling method of above-mentioned CO gas caliberating device adopts comprises the steps: 1) switch on after startup, the carbonomonoxide concentration calibration value that needs demarcation is set by supervisory keyboard; Carbon monoxide transducer inputs to single-chip microcomputer by demarcating indoor real-time concentration value, and first single-chip microcomputer internal calculation program exports LCD display to and show, then Internal Control Procedure ceaselessly compares real-time concentration value and calibration value; 2) in the time that the indoor real-time concentration value of demarcation is less than calibration value, single-chip microcomputer is opened the second solenoid valve of controlling formic acid communication port and the first solenoid valve of controlling carbon monoxide air intake opening, formic acid is entered in reaction bulb through separating funnel, with the generation CO gas that reacts of the concentrated sulphuric acid in reaction bulb, CO gas imports to demarcating indoor not stopping by wireway and carbon monoxide air intake opening; 3) in the time that demarcation chamber real-time concentration value is greater than calibration value, single-chip microcomputer is first opened the 3rd solenoid valve of controlling carbon dioxide mouth, rear control electromagnetic switch conducting the first heating wire, generate carbon dioxide by the powdered reaction of electric-heating-wire-heating sodium bicarbonate solid, carbon dioxide imports to demarcating indoor not stopping by conduit and carbon dioxide mouth; 4) in the time that the indoor concentration value of demarcation reaches calibration value, single-chip microcomputer cuts out each described electromagnetic switch and described solenoid valve, in LCD display, shows, calibration process finishes.
Beneficial effect of the present invention is as follows:
1, carbon monoxide source of the gas of the present invention adopts formic acid to generate through concentrated sulphuric acid dehydration, and non-carbon monoxide is stablized source of the gas and adopted carbon dioxide, makes by heating sodium bicarbonate (being commonly called as sodium bicarbonate) pressed powder, and with low cost, reaction unit is simple.
2, the startup of carbon monoxide generating means of the present invention and carbon dioxide generating device and stopping by electric control, can add electromagnetic switch, realizes the automatic control of single-chip microcomputer to device.
3, demarcation indoor gas path of the present invention adopts S type, is conducive to indoor gas and fully mixes, and improves and detects and stated accuracy.
4, carbon monoxide source of the gas generating rate of the present invention is adjustable, can control very easily the formic acid flow of participating in reaction by control valve, thereby reaches the object of controlling reaction rate.
5, apparatus of the present invention volume is little, is easy to carry about with one, and can demarcate the carbon monoxide of any concentration, meets user's needs in most of occasions.
Brief description of the drawings
?fig. 1 is one-piece construction figure of the present invention;
Fig. 2 is the structural drawing of demarcating chamber 9 in Fig. 1;
Fig. 3 is circuit control principle drawing of the present invention;
Fig. 4 is scaling method process flow diagram of the present invention;
In figure: 1. water inlet; 2. separating funnel; 3. bottleneck; 4. wireway; 5. solenoid valve; 6. carbon monoxide air intake opening; 7. pressure stable hole; 8. carbon dioxide mouth; 9. demarcate chamber; 10. producing carbon dioxide chamber; 11. pick trough; 12. charging apertures; 13. iron pipes; 14.LCD display screen; 15. heating cabinets; 16. heating wire; 17. supervisory keyboards; 18. discharge gates; 19. carbon monoxide air chamber processed; 20. solenoid valves; 21. manually-operated gates; 22. heating bottles; 23. reaction bulbs; 24. heating wire; 25. glass tubes; 26. control circuit boards; 27. carbon monoxide transducers; 28. increase calibration value button; 29. reduce calibration value button; 30. power switch buttons; 31. baffle plates; 32. solenoid valves; 33. carbon dioxide vents; 34. conduits; 35. temperature sensors; 36. formic acid communication port; 37. signal amplifiers; 38 .A/D converters; 39. single-chip microcomputers; 40,41. electromagnetic switch.
Embodiment
Referring to Fig. 1, the present invention is mainly made up of casing, carbon monoxide generating means, carbon dioxide generating device, demarcation chamber 9, carbon monoxide transducer 27, control circuit board 26, supervisory keyboard 17 and LCD display 14, and Fig. 1 is the topology view of taking away after front panel and the top panel of casing.Casing is divided into 3 chambers, is separated by successively from left to right with dividing plate, and left side is that carbon monoxide air chamber 19 processed, centre are to demarcate chamber 9, and right side is producing carbon dioxide chamber 10, between these 3 chambers are mutual, has dividing plate to be separated by.Wherein, carbon monoxide generating means is positioned at carbon monoxide air chamber 19 processed, carbon monoxide transducer 27 and control circuit board 26 are positioned at demarcates chamber 9, and it is indoor 10 that carbon dioxide generating device is positioned at producing carbon dioxide, and LCD display 14 and supervisory keyboard 17 are located at and are demarcated on 9 leading flanks of chamber.
Carbon monoxide generating means mainly comprises separating funnel 2, reaction bulb 23, heating bottle 22, temperature sensor 35 and heating wire 24.The topmost of carbon monoxide generating means is separating funnel 2, in separating funnel 2, fill formic acid, because formic acid has volatility, bottleneck 3 on separating funnel 2 is plugged with rubber stopper, bottleneck 3 extends to casing outside by the circular hole of carbon monoxide air chamber processed 19 tops, in the time that amount of formic acid is not enough, can extracts rubber stopper and add formic acid in separating funnel 2.The bottom of separating funnel 2 is provided with manually-operated gate 21 and solenoid valve 20.The effect of manually-operated gate 21 is to control reaction rate, and solenoid valve 20 connects single-chip microcomputer, is controlled by single-chip microcomputer 39, and its effect is can control the generation of formic acid reaction and stop.The end opening of separating funnel 2 is formic acid communication port 36, stretches in reaction bulb 23, and connects airtight reaction bulb 23, in reaction bulb 23, fill the concentrated sulphuric acid, reaction bulb 23 is placed in heating bottle 22, in heating bottle 22, fills water, heating bottle 22 is placed on carbon monoxide air chamber 19 lower panels processed.The top panel of carbon monoxide air chamber 19 processed is provided with water inlet 1, and glass tube 25 upper ends are communicated with water inlet 1, and lower end is communicated in heating bottle 22, in the time that the water consumption in heating bottle 22 is complete, can in bottle, add water by this water inlet 1.Heating bottle 22 bottoms are provided with temperature sensor 35 and heating wire 24, and temperature sensor 35 connects single-chip microcomputer.Heating wire 24 power supplys have added electromagnetic switch, and electromagnetic switch is connected to the I/O mouth of single-chip microcomputer, produce carbon monoxide by the mixed liquor of heating formic acid and the concentrated sulphuric acid, provide carbon monoxide source of the gas, the start and stop of being reacted by Automatic control of single chip microcomputer for demarcating.
Reaction bulb 23 has good leakproofness, its bottleneck is plugged with rubber stopper, and bottleneck right side has gas outlet, and gas outlet connects glass wireway 4 one end, wireway 4 other ends connect demarcates the carbon monoxide air intake opening 6 that open on 9 upper left sides, chamber, and the carbon monoxide that reaction generates is entered and demarcated chamber 9 by wireway 4.Solenoid valve 5 is set on wireway 4, and solenoid valve 5 connects single-chip microcomputer 39, is automatically controlled by single-chip microcomputer 39.
The front side board of carbon monoxide air chamber 19 processed adopts transparent glass material to make, and facilitates the service condition of formic acid and water in user observation ward, so that formic acid and water consumption are added when complete in time.Carbon monoxide air chamber 19 top panels processed adopt card slot type method to fix, and are convenient to installation and removal, and its effect is the examination and maintenance that facilitate device inside.Along with the carrying out of reaction, in reaction bulb 23, the concentrated sulphuric acid can be diluted gradually, and water-intake capacity also can die down, and when concentration is too low while having influence on reaction velocity, removable top panel is to the interior interpolation concentrated sulphuric acid of reaction bulb 23.
In producing carbon dioxide chamber 10, be provided with heating cabinet 15 and heating wire 16, heating cabinet 15 is placed on the lower panel of producing carbon dioxide chamber 10, heating wire 16 is set in heating cabinet 15 and places sodium bicarbonate, the method reaction that adopts heating wire 16 to heat sodium bicarbonate solid powder generates carbon dioxide.Heating-up temperature can reach degree more than 200, so heating cabinet 15 bottoms adopt thermal insulation material.The feed circuit of heating wire 16 add electromagnetic switch, and electromagnetic switch is connected to single-chip microcomputer 39I/O mouth, control the state of I/O mouth can realize the automatic control to heating arrangement by single-chip microcomputer 39.
On panel above producing carbon dioxide chamber 10, be provided with charging aperture 12, charging aperture 12 is connected to heating cabinet 15 by iron pipe 13, in the time that sodium bicarbonate runs out of, can in heating cabinet 15, add reaction raw materials by this charging aperture 12.On charging aperture 12, be provided with valve, while use, keep valve closing.Meanwhile, be provided with the discharge gate 18 being in communication with the outside in heating cabinet 15 bottoms, the powdered sodium carbonate that reaction is generated discharges.On heating cabinet 15 upper surfaces, have carbon dioxide vent 33, this carbon dioxide vent 33 is connected to the carbon dioxide mouth 8 of demarcating 9 tops, right side, chamber by conduit 34, in the middle of conduit 34, solenoid valve 32 is set, solenoid valve 32 connects single-chip microcomputer 39, is automatically controlled by single-chip microcomputer 39.The carbon dioxide that reaction generates is entered and is demarcated in chamber 9 by conduit 34.Because having water, reaction generates, under the condition of high temperature, can form water vapor, demarcate in chamber 9 for preventing that water vapor from entering, be provided with pick trough 11 at conduit 34 middle parts, pick trough 11 communicates with conduit 34, place lime powder in pick trough 11 the insides, calcium oxide water absorptivity is very strong, can absorb the water vapor in conduit.
Referring to Fig. 2, excessive in order to prevent demarcating the interior pressure in chamber 9, on 9 top panels of demarcation chamber, be provided with a pressure stable hole 7, equate with ambient pressure by keeping demarcating in chamber 9 with external world's exchange air-flow.The supervisory keyboard 17 of demarcating on 9 front panels of chamber comprises three function keys: increase calibration value button 28, reduce calibration value button 29, power switch button 30.User can arrange the concentration value that needs demarcation by button, increases calibration value button 28 and reduce calibration value button 29 to set the concentration value oneself needing.The calibration value arranging can show in LCD display 14, and meanwhile, the real-time concentration value of demarcating in chamber 9 also can show below calibration value.Demarcating chamber 9 volumes is 20*5*10cm, indoor total control circuit board 26,27 and 9 baffle plates 31 of carbon monoxide transducer, control circuit board 26 is fixed on panel inner side and on control circuit board 26, single-chip microcomputer has been installed, 9 baffle plates 31 surround by demarcating 9 inner spaces, chamber the S type structure communicating, this structure is provided with and helps indoor gas and fully mix, and can improve the precision of sensor accuracy of detection and this device normalization.Interval 2cm between every two baffle plates, for the ease of representing clearly inner structure, has only drawn 6 baffle plates in Fig. 2.Carbon monoxide transducer 27 is positioned at the lower position of the most last baffle plate 31, and these the most last baffle plate 31 distance calibration chamber front panels are 2cm.
Referring to Fig. 3, carbon monoxide transducer 27 is connected to signal amplifier 37 input ends, and signal amplifier 37 output terminals connect A/D converter 38.Output terminal, supervisory keyboard 17, LCD display 14, solenoid valve 5,20,32 and the electromagnetic switch 40,41 of temperature sensor 35, A/D converter 38 is connected to respectively the I/O mouth of single-chip microcomputer 39.Between heating wire 16 and single-chip microcomputer 39, be connected in series electromagnetic switch 40, control power turn-on and the cut-out of heating wire 16, between heating wire 24 and single-chip microcomputer 39, be connected in series electromagnetic switch 41, electromagnetic switch 41 is controlled power turn-on and the cut-out of heating wire 24.Solenoid valve 5 is controlled the unlatching of carbon monoxide air intake opening 6 with closed, and solenoid valve 32 is controlled the unlatching of carbon dioxide mouth 8 with closed, and solenoid valve 20 is controlled the unlatching of formic acid communication port 36 with closed.Signal amplifier 37, A/D converter 38 and single-chip microcomputer 39, be all positioned on control circuit board 26.
Referring to Fig. 4, caliberating device of the present invention is at timing signal, and detailed process is as follows:
Because carbon monoxide is flammable explosive gas, in real work, user will keep fire away apparatus of the present invention and hot environment.Meanwhile, because carbon monoxide is produced the method that adopts heating mixing material, apparatus of the present invention can not be inverted.The sensing range of conventional carbonmonoxide detector is conventionally at 0 ~ 999ppm, and calibration range of the present invention can reach 0 ~ 99% in theory.The present invention's carbon monoxide transducer 27 used is electric chemical formula structure, resolution 0.1ppm.
Add respectively the needed raw material of gas processed to carbon monoxide air chamber processed and producing carbon dioxide chamber, in reaction bulb 23, add the concentrated sulphuric acid, in separating funnel 2, add formic acid, in heating cabinet 15, add sodium bicarbonate solid powder.After device energising starts, arranged and waited for that user arranges calibration value the time delay that needs the carbonomonoxide concentration value of demarcating, single-chip microcomputer 39 to have 20 seconds by supervisory keyboard 17, after having arranged, device is started working.First, the real-time concentration of demarcating in chamber 9 is converted into current signal by carbon monoxide transducer 27, this signal is enlarged into voltage signal through signal amplifier 37, then be that digital quantity inputs to single-chip microcomputer 39 through A/D converter 38 circuit conversion, first single-chip microcomputer 39 internal calculation programs are converted into the digital quantity receiving carbonomonoxide concentration value and export LCD display 14 to and show, and real-time concentration value and calibration value that then control program does not stop demarcating in chamber 9 compare.
In the time that the interior concentration value in demarcation chamber 9 is less than calibration value, 39 of single-chip microcomputers are opened the solenoid valve 20 of controlling formic acid communication port 36 and the solenoid valve 5 of controlling carbon monoxide air intake opening 6 by controlling corresponding I/O mouth state, thereby open moving carbon monoxide source of the gas generating means, formic acid enters reaction bulb 23 through separating funnel 2, with the generation CO gas that reacts of the concentrated sulphuric acid in reaction bulb 23, CO gas ceaselessly imports to demarcating in chamber 9 by wireway 4 and carbon monoxide air intake opening 6.
CO gas preparation method adopts formic acid to generate through concentrated sulphuric acid dehydration, under normal temperature state, react slower, along with the rising reaction rate of temperature is accelerated gradually, optimal reaction temperature is in 80 degree left and right, and apparatus of the present invention are by heating to this reaction and heat the water of heating bottle 22.It is such that carbon monoxide is produced process: the concentrated sulphuric acid of 98% concentration is poured in reaction bulb 23, concentration formic acid and high packs in separating funnel 2, for ensureing reaction safety, control formic acid flow by the manually-operated gate 21 that manual adjustments separating funnel 2 is following, formic acid is dropwise splashed in reaction bulb, can suitably tune up according to reaction needed, in heating bottle, add suitable quantity of water, heat by heating wire 24, in reaction bulb 23, formic acid generates carbon monoxide through thermal dehydration.
In the time that reaction is carried out, the real time temperature of water in heating bottle 22 is converted into current signal by temperature sensor 35, then be finally converted to digital quantity through amplifying circuit and A/D change-over circuit and input to single-chip microcomputer 39, single-chip microcomputer 39 maintains 80 degree left and right by Internal Control Procedure by temperature of reaction.In the time that temperature is spent lower than 80, single-chip microcomputer 39 is controlled electromagnetic switch 41 electric conduction heated filament 24 power supplys, and to the water heating in heating bottle 22, temperature is greater than 80 while spending, controls electromagnetic switch 41 and cuts off the electricity supply.
In the time that demarcation chamber 9 real-time concentration values are greater than calibration value, 39 of single-chip microcomputers are opened the solenoid valve 32 of controlling carbon dioxide mouth 8, then control interior heating wire 16 power supplys of electromagnetic switch 40 conducting heating cabinet 15, thereby startup carbon dioxide generating device, heat sodium bicarbonate solid powdered reaction by heating wire 16 and generate carbon dioxide, carbon dioxide ceaselessly imports to demarcating in chamber 9 by conduit 34 and carbon dioxide mouth 8.
In the time that the interior concentration value in demarcation chamber 9 reaches calibration value, 39 of single-chip microcomputers cut out all electromagnetic switch and solenoid valve, and show " OK " in LCD display 14, and calibration process finishes.
Claims (2)
1. a CO gas scaling method, adopt CO gas caliberating device, described CO gas caliberating device has a casing, and casing is carbon monoxide air chamber processed (19), demarcation chamber (9), producing carbon dioxide chamber (10) that are separated by with dividing plate from left to right successively; In described demarcation chamber (9), having carbon monoxide transducer (27) and control circuit board (26), is LCD display (14) and supervisory keyboard (17) on leading flank;
Topmost in described carbon monoxide air chamber processed (19) is the separating funnel (2) that fills formic acid, separating funnel (2) bottom is provided with manually-operated gate (21) and the second solenoid valve (20), the end opening of separating funnel (2) is formic acid communication port (36), formic acid communication port (36) stretches in the airtight reaction bulb that fills the concentrated sulphuric acid (23), reaction bulb (23) is placed in the heating bottle (22) that fills water, and heating bottle (22) bottom is provided with temperature sensor (35) and the second heating wire (24); Reaction bulb (23) is communicated with and is demarcated chamber (9) upper left carbon monoxide air intake openings (6) by glass wireway (4), and wireway (4) is provided with the first solenoid valve (5);
In described producing carbon dioxide chamber (10), be provided with heating cabinet (15), the first heating wire (16) is set in heating cabinet (15) and places sodium bicarbonate solid powder, heating cabinet (15) is communicated with the carbon dioxide mouth (8) of demarcating top, right side, chamber (9) by conduit (34), the 3rd solenoid valve (32) is set in the middle of conduit (34);
Described control circuit board (26) is provided with single-chip microcomputer (39), signal amplifier (37) and A/D converter (38), carbon monoxide transducer (27) is connected to signal amplifier (37) input end, and signal amplifier (37) output terminal connects A/D converter (38); Described temperature sensor (35), A/D converter (38) output terminal, supervisory keyboard (17), LCD display (14) and first, second, third solenoid valve (5,20,32) are connected respectively different I/O port of single-chip microcomputer (39); Between first, second heating wire (16,24) and single-chip microcomputer (39), be connected in series respectively first, second electromagnetic switch (40,41), it is characterized in that comprising the steps:
1) by supervisory keyboard (17), the carbonomonoxide concentration calibration value that needs demarcation is set, the real-time concentration value of demarcating in chamber (9) is inputed to single-chip microcomputer (39) by carbon monoxide transducer (27), first single-chip microcomputer (39) internal calculation program exports LCD display (14) to and shows, then Internal Control Procedure ceaselessly compares real-time concentration value and calibration value;
2) in the time that in demarcation chamber (9), real-time concentration value is less than calibration value, single-chip microcomputer (39) is opened the second solenoid valve (20) of controlling formic acid communication port (36) and the first solenoid valve (5) of controlling carbon monoxide air intake opening (6), make formic acid enter in reaction bulb (23) and strong sulfuric acid response generation CO gas through separating funnel (2), CO gas does not stop to import to demarcating in chamber (9) by wireway (4) and carbon monoxide air intake opening (6);
3) in the time that demarcation chamber (9) real-time concentration value is greater than calibration value, single-chip microcomputer (39) is first opened the 3rd solenoid valve (32) of controlling carbon dioxide mouth (8), rear control the first electromagnetic switch (40) conducting the first heating wire (16), generate carbon dioxide by the powdered reaction of heating wire (16) heating sodium bicarbonate solid, carbon dioxide does not stop to import to demarcating in chamber (9) by conduit (34) and carbon dioxide mouth (8);
4) in the time that in demarcation chamber (9), concentration value reaches calibration value, single-chip microcomputer (39) cuts out each described electromagnetic switch and described solenoid valve, and in the upper demonstration of LCD display (14), calibration process finishes.
2. scaling method according to claim 1, it is characterized in that: the real time temperature of water in heating bottle (22) is inputed to single-chip microcomputer (39) by temperature sensor (35), in the time that temperature is spent lower than 80, single-chip microcomputer (39) is controlled the second electromagnetic switch (41) conducting the second heating wire (24) power supply water is heated, and temperature is greater than 80 and cuts off the electricity supply while spending.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110144411.4A CN102323380B (en) | 2011-05-31 | 2011-05-31 | Carbon monoxide gas calibrating device and method |
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| CN201110144411.4A CN102323380B (en) | 2011-05-31 | 2011-05-31 | Carbon monoxide gas calibrating device and method |
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| CN102323380A CN102323380A (en) | 2012-01-18 |
| CN102323380B true CN102323380B (en) | 2014-07-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104864898B (en) * | 2014-02-20 | 2019-04-23 | 中国科学院广州生物医药与健康研究院 | The critique system and method for measurement value sensor in bio-incubator |
| CN104090072B (en) * | 2014-07-03 | 2016-04-20 | 中国人民解放军后勤工程学院 | A kind of gas concentration detector caliberating device |
| CN106841524B (en) * | 2017-01-20 | 2019-03-12 | 山东省科学院自动化研究所 | A kind of intelligence toxic gas detector experimental rig and method |
| CN107966544A (en) * | 2017-12-26 | 2018-04-27 | 重庆光可巡科技有限公司 | Avoid the correction system of the combustible gas probe of manual synchronizing |
| CN110589829B (en) * | 2019-08-16 | 2021-05-28 | 浙江大学 | Preparation and purification CO collection experimental device |
| CN111007204B (en) * | 2019-12-23 | 2022-05-31 | 中国人民解放军92609部队 | Gas analysis verification equipment |
| CN113075263B (en) * | 2021-03-24 | 2022-06-24 | 南京信息工程大学 | Calibration device for CO gas sensor |
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| US4384925A (en) * | 1980-10-24 | 1983-05-24 | Becton Dickinson And Company | Gas sensing unit with automatic calibration method |
| GB2407870A (en) * | 2003-11-10 | 2005-05-11 | Kidde Ip Holdings Ltd | Self-testing gas generator |
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| CN101228438A (en) * | 2005-05-24 | 2008-07-23 | 霍尼韦尔国际公司 | Carbon dioxide sensor comprising CO2 calibration gas generator |
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