CN102608257B - Digital oxygen index tester - Google Patents
Digital oxygen index tester Download PDFInfo
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- CN102608257B CN102608257B CN201210052812.1A CN201210052812A CN102608257B CN 102608257 B CN102608257 B CN 102608257B CN 201210052812 A CN201210052812 A CN 201210052812A CN 102608257 B CN102608257 B CN 102608257B
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Abstract
The invention provides a digital oxygen index tester, comprising air inlet equipment, combustion equipment, and signal input and output equipment, wherein the air inlet equipment is provided with an electronic gas flow counter to control flows of O2 and N2 gases; and the combustion equipment is internally provided with an infrared temperature sensor to detect the temperature of a combusted test sample, and is additionally provided with a photoelectric sensor to detect whether the sample is combusted to an appointed distance or not. A timer is arranged in a single chip microcomputer for controlling an LED (Light-emitting Diode) screen; a flow monitoring signal, a temperature signal, a photoelectric signal and a timer signal are converted into digital signals through an amplifying circuit and an A/D (Analog to Digital) converter to be input into the single chip microcomputer; the digital signals are processed by a data processor in the single chip microcomputer; after the data processing is finished, the processed signals are output to a touch LED screen and are stored in an SD (Secure Digital) card. According to the digital oxygen index tester disclosed by the invention, the reading error caused by a manual operation is greatly reduced and the labor amount of a test operator is reduced; and whether a detected value is close to an oxygen index value of the sample is predicated through the combustion temperature, so that the testing efficiency is improved.
Description
Technical field
The present invention relates to a kind of digital oxygen index tester.
Background technology
In current China building design and construction, more than 90% all adopts the organic thermal insulation material of the macromolecules such as extrusion molding polystyrene polyfoam (XPS), model polystyrene foam (EPS) or RPUF (PU) as exterior wall or thermal insulation of roof material, organic thermal insulation materials Applicable temperature scope is wide, permanance is better, cost performance is very high, but still there is some problems and major hidden danger, wherein fire safety problem, particularly outstanding in recent years.Above-mentioned organic foam thermal insulation material is inflammable material, there is very big hidden danger in fire safety, has caused great casualties and property loss.Such as Shanghai Jiangzhou road big fire on November 15th, 2010, causes wrecked more than 70 people of 58 people injured; It is dead that mansion, Jiahe, Mong Kok, Hong Kong on the 10th August in 2009 fire causes 4 people; Big fire occurs causes venue and seriously damage for the newly-built China Science and Technology Hall in Beijing on April 16 roof southeast corner in 2009; Within 2009, CCTV on February 9 new address BeiPeiLou fire causes loss up to 5,000,000,000 yuan.In these fire, " 11.15 " Shanghai Jiangzhou road wildfire system ignites caused by polyurethane foamed material due to work progress; The fire system of cultural center of CCTV of 2009 is caused by extrusion molding polyphenyl sheet material ignites; The big fire of newly-built China Science and Technology Hall is also because the extruded sheet that ignites causes fire.
The generation of these accidents not only brings great economic loss to country, also result in great casualties, and the burning of material is all relevant with the concentration of oxygen simultaneously.Therefore, measure the oxygen index of different material to fire preventing, development fire proofing material has great significance.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of digital oxygen index tester, and it can measure the oxygen index of different material, has great significance to fire preventing and development fire proofing material.
The present invention's adopted technical scheme that solves the problem is: digital oxygen index tester, it is characterized in that including air intake apparatus, combustion apparatus, signal input-output device, single-chip microcomputer and LED touch screen, wherein air intake apparatus is connected with combustion apparatus by pipeline, combustion apparatus is connected with signal input-output device by wire, signal input-output device is connected with single-chip microcomputer by wire, and single-chip microcomputer shields by wire transmission the information of process to LED touch;
Air intake apparatus includes O
2hold-up vessel, N
2hold-up vessel and gas mixing bunker, O
2hold-up vessel is connected with gas and vapor permeation storehouse by pipeline, and pipeline is disposed with O
2switch cuts down, O
2gas gauge, O
2transition reduction valve, O
2electronic flow meter and O
2electronic switch operation valve, N
2hold-up vessel is connected with gas and vapor permeation storehouse by pipeline, and pipeline is disposed with N
2switch cuts down, N
2gas gauge, N
2transition reduction valve, N
2electronic flow meter and N
2electronic switch operation valve, O
2and N
2proportionally flow to gas and vapor permeation storehouse, after mixing, flows into combustion equipment;
Described combustion apparatus includes and does not fire casing, portfire and at least one group of subsidiary equipment, described subsidiary equipment includes sample clamp, flame collector lens, photoelectric sensor, infrared temperature inductor, photoelectric sensor is fixed on and does not fire casing side, apart from tested sample top 50 ± 1mm, infrared temperature inductor is fixed on and does not fire top cover of box and be positioned at directly over tested sample, infrared temperature inductor is apart from tested sample top 30 ± 1mm, described portfire is removable lighter, the side in not firing casing is installed in activity, ensure that the flame of removable lighter contacts with sample top,
The photosignal that the temperature signal that the flow signal that described electronic flow meter detects, infrared temperature inductor detect, photoelectric sensor detect fills parallel operation by respective wire, amplifying circuit and A/D and is connected with single-chip microcomputer, each signal is input in the data processor of single-chip microcomputer and carries out data processing and analysis, the digital signal obtained after treated analysis outputs to LED touch screen and shows monitoring in real time, and is stored into SD card reservoir and saves as experimental data.
By such scheme, described subsidiary equipment includes three groups.
Digital oxygen index tester of the present invention, during use, includes following test procedure:
Rule of thumb or the aerial combustion case of sample, in air, oxygen concentration is about 21%, therefore initial lead in oxygen concentration be 21%.
install sample, be placed on by sample on sample clamp, casing center is not fired in being arranged on of maintenance level, ensures that sample top distance is not fired on the left of casing and is not less than 100mm, facilitate ignition device.
adjustments of gas control device, inputs gas flow rate by LED display, makes initial O
2concentration is 21%, flows to do not fire casing with the flow velocity of 40 mm/s, washing casing 30s.
light sample, make removable igniter flame visible part just contact sample front end, do not encounter seamed edge and the side surface of sample, after guaranteeing that sample is lighted, remove lighter.The time of ignition action is the longest is 30s, if can not light in 30s, then increases oxygen concentration.Until can ignition position in 30s.
observe sample burning behavior, by timer record burning time, whether can be burned to 50 ± 1mm place by photoelectric sensor and infrared temperature inductor record sample, if sample burning times is more than 180s or be burned to 50 ± 1mm place, record oxygen concentration is Q
1if sample burning times is not more than 180s and can not be burned to 50 ± 1mm place, record oxygen concentration is Q
2, stop burning.
With Q
1for initial concentration, the speed with 1% reduces O
2concentration, repeats
~
test, until first time occurs that sample burning times can not be burned to 50 ± 1mm place not more than 180s, record oxygen concentration is Q.
With Q
2for initial concentration, the speed with 1% increases O
2concentration, repeats
~
test, until first time occurs that sample burning times is more than 180s or be burned to 50 ± 1mm place, record oxygen concentration is Q.
Then oxygen index (G) computing formula is:
G= V(O
2)／(V(O
2)+V(N
2))
V (O
2) represent oxygen flow mL/s, V (N
2) represent that nitrogen flow mL/s, G represent oxygen index
The present invention inputs required flow O by touch screen LED
2and N
2gas flow, by controller to O
2and N
2the electronic valve of gas is pressed inputted flow control and is regulated, measuring tempeature is carried out with infrared temperature inductor, whether characterizing sample is lighted, and the distance of burning, temperature signal is transferred on touch screen LED and observes by infrared temperature inductor, measure sample with photoelectric sensor and whether can be burned to 50 ± 1mm place, when sample is burned to 50 ± 1mm place, certain high light can be produced, photoelectric sensor is by photosensitive, live signal is passed to LED screen, can observe signal intensity by LED screen, can reaction sample be burned to 50 ± 1mm place.
The present invention can be used for measuring various material: as the burning performance of textile, plastics, rubber, timber etc., its measure principle burning extent and characterize burning time, can observe the burning length of sample and arrive 50 ± 1mm place, can record burning time more than 180s, by change O
2and N
2gas flow realizes.
In actual measurement, first rule of thumb estimate an oxygen density value, test, observe combustion case and burning time.Again according to different combustion characteristics, change oxygen density value, through change repeatedly and trial, ceaselessly change oxygen density value, the combustion characteristics of sample is met the requirements prescribed, and record oxygen density value now, goes out the oxygen index value of this sample according to formulae discovery.
The invention has the advantages that: for the deficiency of traditional analyzer, after analyzer digitizing, O
2and N
2the flow of gas inputs required flow by touch screen LED, O
2and N
2gas flow by controller to O
2and N
2the electronic valve of gas is pressed inputted flow control and is regulated, 50 ± 1mm place can be burned to collector lens and photoelectric sensor multiple measurement sample, and real-time for light signal signal is reacted on touch screen LED, convenient observation, by infrared thermometer survey temperature of combustion height determine whether close to oxygen index value, and temperature signal is transferred on touch screen LED and observes, greatly can reduce manual operation and the error caused, reduce the labor capacity of test, improve testing efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of analyzer of the present invention
Wherein O
2switch cuts down-1, N
2switch cuts down-2, O
2gas gauge-3, N
2gas gauge-4, O
2transition reduction valve-5, N
2transition reduction valve-6, O
2flow gauge-7, N
2flow gauge-8, O
2electronic switch operation valve-9, N
2electronic switch operation valve-10, gas mixer-11, removable lighter-12, butane flame-13, infrared temperature inductor-14, tested sample-15, photoelectric sensor-16, burning casing-17, sample clamp-18, single-chip microcomputer-19, LED touch screen-20, vent port-21.
Embodiment
below in conjunction with accompanying drawing, the present invention will be further described in detail, but this explanation can not be construed as limiting the invention.
Digital oxygen index tester, include air intake apparatus, combustion apparatus, signal input-output device, single-chip microcomputer and LED touch screen, wherein air intake apparatus is connected with combustion apparatus by pipeline, combustion apparatus is connected with signal input-output device by wire, signal input-output device is connected with single-chip microcomputer by wire, and single-chip microcomputer shields by wire transmission the information of process to LED touch;
Air intake apparatus includes O
2hold-up vessel, N
2hold-up vessel and gas mixing bunker 11, O
2hold-up vessel is connected with gas and vapor permeation storehouse by pipeline, and pipeline is disposed with O
2switch cuts down 1, O
2gas gauge 3, O
2transition reduction valve 5, O
2electronic flow meter 7 and O
2electronic switch operation valve 9, N
2hold-up vessel is connected with gas and vapor permeation storehouse by pipeline, and pipeline is disposed with N
2switch cuts down 2, N
2gas gauge 4, N
2transition reduction valve 6, N
2electronic flow meter 8 and N
2electronic switch operation valve 10, O
2and N
2proportionally flow to gas and vapor permeation storehouse, after mixing, flows into combustion equipment;
Described combustion apparatus includes and does not fire casing 17, portfire and three groups of subsidiary equipment, described subsidiary equipment includes sample clamp 18, flame collector lens, photoelectric sensor 16, infrared temperature inductor 14, photoelectric sensor is fixed on and does not fire casing side, apart from tested sample 15 top 50 ± 1mm, infrared temperature inductor is fixed on and does not fire top cover of box and be positioned at directly over tested sample, infrared temperature inductor is apart from tested sample top 30 ± 1mm, described portfire is removable lighter 12, the side in not firing casing is installed in activity, ensure that the flame of removable lighter contacts with sample top,
The photosignal that the temperature signal that the flow signal that described electronic flow meter detects, infrared temperature inductor detect, photoelectric sensor detect fills parallel operation by respective wire, amplifying circuit and A/D and is connected with single-chip microcomputer 19, each signal is input in the data processor of single-chip microcomputer and carries out data processing and analysis, the digital signal obtained after treated analysis outputs to LED touch screen and 20 shows monitoring in real time, and is stored into SD card reservoir and saves as experimental data.
application Example 1:
prepare sample, EPS styrofoam DYD-1 is prepared into 15 samples, sample length is 80 ~ 150mm, wide 6.5 ± 0.5mm, thick 3.5 ± 0.5mm, divides 5 groups, often organizes 3 with for subsequent use.
rule of thumb or the aerial combustion case of sample, in air, oxygen concentration is about 21%, therefore initial lead in oxygen concentration be 21%.
3 identical samples are arranged on sample clamp, ensure that sample is vertically fixed, adjusting gas flow meter, by LED touch screen input gas flow rate, make initial O by fixing sample
2concentration is 21%, and with the flow velocity flows into combustion casing of 40mm/s, washing burning casing 30s, gas is got rid of from vent port-21.
light sample, butane flame 13 visible part that removable lighter is produced just contacts sample front end, after guaranteeing that sample is lighted, removes removable lighter.The time of ignition action is the longest is 30s, if can not light in 30s, then increases oxygen concentration, until can ignition position in 30s.
Observe sample burning behavior, by timer record burning time, whether can be burned to 50 ± 1mm place by photoelectric sensor and infrared temperature inductor record sample, if sample burning times is more than 180s or be burned to 50 ± 1mm place, record oxygen concentration is Q
1if sample burning times is not more than 180s and can not be burned to 50 ± 1mm place, record oxygen concentration is Q
2, stop burning.
With Q
1for initial concentration, the speed with 1% reduces O
2concentration, repeats
~
test, until first time occurs that sample burning times can not be burned to 50 ± 1mm place not more than 180s, record oxygen concentration is Q.
With Q
2for initial concentration, the speed with 1% increases O
2concentration, repeats
~
test, until first time occurs that sample burning times is more than 180s or be burned to 50 ± 1mm place, record oxygen concentration is Q.
When oxygen concentration is 21%, the burning extent of EPS styrofoam DYD-1 sample is 93mm, and burning time is 78s, when oxygen concentration is 20%; Burning extent 76mm, burning time is 85s, when oxygen concentration is 19%; Burning extent 56mm, burning time is 112s, when oxygen concentration is 18%; Burning extent 49mm, burning time is 148s.According to formulae discovery, the oxygen index of EPS styrofoam KH-1 is close to 18.
application Example 2:
prepare sample, EPS styrofoam DYD-2 is prepared into 15 samples, sample length is 80 ~ 150mm, wide 6.5 ± 0.5mm, thick 3.5 ± 0.5mm, divides 5 groups, often organizes 3 with for subsequent use.
rule of thumb or the aerial combustion case of sample, in air, oxygen concentration is about 21%, therefore initial lead in oxygen concentration be 21%.
3 identical samples are arranged on sample clamp, ensure that sample is vertically fixed, adjusting gas flow meter, by LED touch screen input gas flow rate, make initial O by fixing sample
2concentration is 21%, and with the flow velocity flows into combustion casing of 40mm/s, washing burning casing 30s, gas is got rid of from vent port-21.
light sample, make removable igniter flame visible part just contact sample front end, after guaranteeing that sample is lighted, remove removable lighter.The time of ignition action is the longest is 30s, if can not light in 30s, then increases oxygen concentration, until can ignition position in 30s.
Observe sample burning behavior, by timer record burning time, whether can be burned to 50 ± 1mm place by photoelectric sensor and infrared temperature inductor record sample, if sample burning times is more than 180s or be burned to 50 ± 1mm place, record oxygen concentration is Q
1if sample burning times is not more than 180s and can not be burned to 50 ± 1mm place, record oxygen concentration is Q
2, stop burning.
With Q
1for initial concentration, the speed with 1% reduces O
2concentration, repeats
~
test, until first time occurs that sample burning times can not be burned to 50 ± 1mm place not more than 180s, record oxygen concentration is Q.
With Q
2for initial concentration, the speed with 1% increases O
2concentration, repeats
~
test, until first time occurs that sample burning times is more than 180s or be burned to 50 ± 1mm place, record oxygen concentration is Q.
When oxygen concentration is 21%, the burning extent of EPS styrofoam DYD-2 sample is 84mm, and burning time is 93s, when oxygen concentration is 20%; Burning extent 63mm, burning time is 121s, when oxygen concentration is 19%; Burning extent 51mm, burning time is 153s, when oxygen concentration is 18%; Burning extent 38mm, burning time is 172s.According to formulae discovery, the oxygen index of EPS styrofoam DYD-2 is close to 19.
application Example 3:
prepare sample, EPS styrofoam DYD-3 is prepared into 15 samples, sample length is 80 ~ 150mm, wide 6.5 ± 0.5mm, thick 3.5 ± 0.5mm, divides 5 groups, often organizes 3 with for subsequent use.
rule of thumb or the aerial combustion case of sample, in air, oxygen concentration is about 21%, therefore initial lead in oxygen concentration be 21%.
3 identical samples are arranged on sample clamp, ensure that sample is vertically fixed, adjusting gas flow meter, by LED touch screen input gas flow rate, make initial O by fixing sample
2concentration is 21%, and with the flow velocity flows into combustion casing of 40mm/s, washing burning casing 30s, gas is got rid of from vent port-21.
light sample, make removable igniter flame visible part just contact sample front end, after guaranteeing that sample is lighted, remove removable lighter.The time of ignition action is the longest is 30s, if can not light in 30s, then increases oxygen concentration, until can ignition position in 30s.
Observe sample burning behavior, by timer record burning time, whether can be burned to 50 ± 1mm place by photoelectric sensor and infrared temperature inductor record sample, if sample burning times is more than 180s or be burned to 50 ± 1mm place, record oxygen concentration is Q
1if sample burning times is not more than 180s and can not be burned to 50 ± 1mm place, record oxygen concentration is Q
2, stop burning.
With Q
1for initial concentration, the speed with 1% reduces O
2concentration, repeats
~
test, until first time occurs that sample burning times can not be burned to 50 ± 1mm place not more than 180s, record oxygen concentration is Q.
With Q
2for initial concentration, the speed with 1% increases O
2concentration, repeats
~
test, until first time occurs that sample burning times is more than 180s or be burned to 50 ± 1mm place, record oxygen concentration is Q.
When oxygen concentration is 21%, the burning extent of EPS styrofoam DYD-3 sample is 12mm, and burning time is 23s, when oxygen concentration is 22%; Burning extent 36mm, burning time is 58s, when oxygen concentration is 23%; Burning extent 42mm, burning time is 113s, when oxygen concentration is 24%; Burning extent 51mm, burning time is 152s.According to formulae discovery, flame retardant type energy-conserving plate material IIP plate oxygen index is close to 24.
application Example 4:
prepare sample, flame retardant type energy-conserving plate material IIP plate is prepared into 15 samples, sample length is 80 ~ 150mm, wide 6.5 ± 0.5mm, thick 3.5 ± 0.5mm, divides 5 groups, often organizes 3 with for subsequent use.
rule of thumb or the aerial combustion case of sample, in air, oxygen concentration is about 21%, therefore initial lead in oxygen concentration be 21%.
3 identical samples are arranged on sample clamp, ensure that sample is vertically fixed, adjusting gas flow meter, by LED touch screen input gas flow rate, make initial O by fixing sample
2concentration is 21%, and with the flow velocity flows into combustion casing of 40mm/s, washing burning casing 30s, gas is got rid of from vent port-21.
light sample, make removable igniter flame visible part just contact sample front end, after guaranteeing that sample is lighted, remove removable lighter.The time of ignition action is the longest is 30s, if can not light in 30s, then increases oxygen concentration, until can ignition position in 30s.
Observe sample burning behavior, by timer record burning time, whether can be burned to 50 ± 1mm place by photoelectric sensor and infrared temperature inductor record sample, if sample burning times is more than 180s or be burned to 50 ± 1mm place, record oxygen concentration is Q
1if sample burning times is not more than 180s and can not be burned to 50 ± 1mm place, record oxygen concentration is Q
2, stop burning.
With Q
1for initial concentration, the speed with 1% reduces O
2concentration, repeats
~
test, until first time occurs that sample burning times can not be burned to 50 ± 1mm place not more than 180s, record oxygen concentration is Q.
With Q
2for initial concentration, the speed with 1% increases O
2concentration, repeats
~
test, until first time occurs that sample burning times is more than 180s or be burned to 50 ± 1mm place, record oxygen concentration is Q.
When oxygen concentration is 21%, the burning extent of flame retardant type energy-conserving plate material IIP plate sample is 0mm, and burning time is 0s, when oxygen concentration is 22%; Burning extent 0mm, burning time is 0s, when oxygen concentration is 23%; Burning extent 2mm, burning time is 0s, when oxygen concentration is 24%; Burning extent 5mm, burning time is 2s, when oxygen concentration is 25%, burning extent 8mm, burning time is 3s, and continuing increases oxygen concentration, burning extent is very short (being less than 50mm) still, burning time is very little (being less than 180s) also, and according to formulae discovery, flame retardant type energy-conserving plate material IIP plate is A level nonflammable material.
Claims (1)
1. digital oxygen index tester, it is characterized in that including air intake apparatus, combustion apparatus, signal input-output device, single-chip microcomputer and LED touch screen, wherein air intake apparatus is connected with combustion apparatus by pipeline, combustion apparatus is connected with signal input-output device by wire, signal input-output device is connected with single-chip microcomputer (19) by wire, and single-chip microcomputer shields by wire transmission the information of process to LED touch;
Air intake apparatus includes O
2hold-up vessel, N
2hold-up vessel and gas mixing bunker (11), O
2hold-up vessel is connected with gas and vapor permeation storehouse by pipeline, and pipeline is disposed with O
2switch valve (1), O
2gas gauge (3), O
2transition reduction valve (5), O
2electronic flow meter (7) and O
2electronic switch operation valve (9), N
2hold-up vessel is connected with gas and vapor permeation storehouse by pipeline, and pipeline is disposed with N
2switch valve (2), N
2gas gauge (4), N
2transition reduction valve (6), N
2electronic flow meter (8) and N
2electronic switch operation valve (10), O
2and N
2proportionally flow to gas and vapor permeation storehouse, after mixing, flows into combustion equipment;
Described combustion apparatus includes and does not fire casing (17), portfire and three groups of subsidiary equipment, described subsidiary equipment includes sample clamp (18), flame collector lens, photoelectric sensor (16), infrared temperature inductor (14), photoelectric sensor is fixed on and does not fire casing side, apart from tested sample (15) top 50 ± 1mm, infrared temperature inductor is fixed on and does not fire top cover of box and be positioned at directly over tested sample, infrared temperature inductor is apart from tested sample top 30 ± 1mm, described portfire is removable lighter (12), the side in not firing casing is installed in activity, ensure that the flame of removable lighter contacts with sample top,
The photosignal that the temperature signal that the flow signal that described electronic flow meter detects, infrared temperature inductor detect, photoelectric sensor detect fills parallel operation by respective wire, amplifying circuit and A/D and is connected with single-chip microcomputer, each signal is input in the data processor of single-chip microcomputer and carries out data processing and analysis, the digital signal obtained after treated analysis outputs to LED touch screen and 20 shows monitoring in real time, and is stored into SD card reservoir and saves as experimental data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210052812.1A CN102608257B (en) | 2012-03-02 | 2012-03-02 | Digital oxygen index tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210052812.1A CN102608257B (en) | 2012-03-02 | 2012-03-02 | Digital oxygen index tester |
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| CN102608257A CN102608257A (en) | 2012-07-25 |
| CN102608257B true CN102608257B (en) | 2015-07-22 |
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|---|---|---|---|
| CN201210052812.1A Expired - Fee Related CN102608257B (en) | 2012-03-02 | 2012-03-02 | Digital oxygen index tester |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149321B (en) * | 2013-02-25 | 2015-04-29 | 上海长园电子材料有限公司 | Oxygen index test system |
| CN105467065B (en) * | 2015-12-30 | 2017-08-15 | 重庆精榜高分子材料有限公司 | A kind of oxygen index (OI) tester |
| CN107703252A (en) * | 2017-11-07 | 2018-02-16 | 中国计量大学 | The device of the burning time of recorded matter and light intensity change in a kind of oxygen index instrument |
| CN109738573A (en) * | 2019-03-05 | 2019-05-10 | 中国民用航空飞行学院 | Pressure changeable flow adjustable type material fire retardant property combustion testing platform |
| CN109959752A (en) * | 2019-03-15 | 2019-07-02 | 河南诚信密封材料有限公司 | A kind of detection device and detection method of hollow glass dedicated butyl glue flame retardant property |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2415358Y (en) * | 2000-02-04 | 2001-01-17 | 山东省纺织科学研究院 | Automatic oxygen index measurer |
| CN101082613A (en) * | 2007-07-02 | 2007-12-05 | 深圳职业技术学院 | Intelligent tester for testing flammability of toy |
| CN202033342U (en) * | 2011-03-16 | 2011-11-09 | 南京上元分析仪器有限公司 | Oxygen index meter for building materials |
| CN202033628U (en) * | 2011-03-16 | 2011-11-09 | 南京上元分析仪器有限公司 | Test control system of building material oxygen index |
| CN102353748A (en) * | 2011-09-22 | 2012-02-15 | 东南大学 | Oxygen index tester |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6780378B2 (en) * | 2001-06-28 | 2004-08-24 | Gas Technology Institute | Method for measuring concentrations of gases and vapors using controlled flames |
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2012
- 2012-03-02 CN CN201210052812.1A patent/CN102608257B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2415358Y (en) * | 2000-02-04 | 2001-01-17 | 山东省纺织科学研究院 | Automatic oxygen index measurer |
| CN101082613A (en) * | 2007-07-02 | 2007-12-05 | 深圳职业技术学院 | Intelligent tester for testing flammability of toy |
| CN202033342U (en) * | 2011-03-16 | 2011-11-09 | 南京上元分析仪器有限公司 | Oxygen index meter for building materials |
| CN202033628U (en) * | 2011-03-16 | 2011-11-09 | 南京上元分析仪器有限公司 | Test control system of building material oxygen index |
| CN102353748A (en) * | 2011-09-22 | 2012-02-15 | 东南大学 | Oxygen index tester |
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|---|---|
| CN102608257A (en) | 2012-07-25 |
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