CN102608257A - Digital oxygen index tester - Google Patents
Digital oxygen index tester Download PDFInfo
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- CN102608257A CN102608257A CN2012100528121A CN201210052812A CN102608257A CN 102608257 A CN102608257 A CN 102608257A CN 2012100528121 A CN2012100528121 A CN 2012100528121A CN 201210052812 A CN201210052812 A CN 201210052812A CN 102608257 A CN102608257 A CN 102608257A
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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 digitizing limiting oxygen index determination appearance.
Background technology
At present in China's building design and construction; All adopt the organic thermal insulation material of extrusion molding polystyrene polyfoam (XPS), model polystyrene foam (EPS) or RPUF macromolecules such as (PU) as exterior wall or thermal insulation of roof material more than 90%; Organic thermal insulation materials Applicable temperature scope is wide, permanance is better, and cost performance is very high, but still has some problems and major hidden danger; Wherein fire safety problem is particularly outstanding in recent years.Above-mentioned organic foam thermal insulation material is inflammable material, aspect fire safety, has very big hidden danger, has caused great casualties and property loss.Such as Shanghai on the 15th Jiangzhou road big fire November in 2010, it is injured to cause surplus 58 people wrecked 70 people; It is dead that Jiahe, Mong Kok, Hong Kong on the 10th August in 2009 mansion 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; February in 2009, CCTV on the 9th new address BeiPeiLou fire caused loss up to 5,000,000,000 yuan.In these fire, wildfire system in " 11.15 " Jiangzhou, Shanghai road ignites owing to work progress due to the polyurethane foamed material; CCTV cultural center's fire system in 2009 is because due to extrusion molding type polyphenyl sheet material ignites; The big fire of newly-built China Science and Technology Hall also is to cause fire because of the extruded sheet that ignites.
The generation of these accidents has not only brought great economic loss to country, also caused great casualties simultaneously, and the burning of material is all relevant with concentration of oxygen.Therefore, the oxygen index of measuring different material is to fire preventing, and the development fire proofing material has great significance.
Summary of the invention
Technical matters to be solved by this invention provides a kind of digitizing limiting oxygen index determination appearance, and it can measure the oxygen index of different material, and fire preventing and development fire proofing material are had great significance.
The present invention addresses the above problem the technical scheme that is adopted: digitizing limiting oxygen index determination appearance; 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 through pipeline, and combustion apparatus links to each other with signal input-output device through lead; Signal input-output device links to each other with single-chip microcomputer through lead, and single-chip microcomputer is transferred to the LED touch-screen to information processed through lead;
Air intake apparatus includes O
2Hold-up vessel, N
2Hold-up vessel and gas mixing bunker, O
2Hold-up vessel links to each other with the gas mixing bunker through pipeline, is disposed with O on the pipeline
2Switch cuts down, O
2Gas gauge, O
2Transition reduction valve, O
2Electronic flow meter and O
2The electronic switch operation valve, N
2Hold-up vessel links to each other with the gas mixing bunker through pipeline, is disposed with N on the pipeline
2Switch cuts down, N
2Gas gauge, N
2Transition reduction valve, N
2Electronic flow meter and N
2The electronic switch operation valve, O
2And N
2Proportionally flow to the gas mixing bunker, after mixing, flows into combustion equipment;
Described combustion apparatus includes casing, portfire and at least one group of subsidiary equipment of not firing; Described subsidiary equipment includes sample clamp, flame collector lens, photoelectric sensor, infrared temperature inductor; Photoelectric sensor is fixed in and does not fire casing one side, 50 ± 1mm apart from the tested sample top, infrared temperature inductor be fixed in do not fire the casing top cover and be positioned at tested sample directly over; The infrared temperature inductor is 30 ± 1mm apart from the tested sample top; Described portfire is removable lighter, and activity is installed in a side of not firing casing, guarantees that the flame of removable lighter contacts with the sample top;
The photosignal that temperature signal, photoelectric sensor detected that the flow signal that described electronic flow meter detects, infrared temperature inductor detect is through lead, amplifying circuit and A/D dress parallel operation are connected with single-chip microcomputer separately; Each signal is input in the data processor of single-chip microcomputer and carries out data processing and analysis; The digital signal that obtains after the treated analysis outputs to the LED touch-screen and shows monitoring in real time, and is stored into SD card reservoir and saves as experimental data.
Press such scheme, described subsidiary equipment includes three groups.
Digitizing limiting oxygen index determination appearance of the present invention during use, includes following test procedure:
Rule of thumb or the aerial combustion case of sample, oxygen concentration is about 21% in the air, therefore initial lead in oxygen concentration be 21%.
installs sample; Sample is placed on the sample clamp; The casing center is not fired in being installed in of maintenance level; Guarantee that sample top distance is not less than 100mm on the left of not firing casing, makes things convenient for ignition device.
With Q
1Be initial concentration, the speed with 1% reduces O
2Concentration repeats
~
Test surpasses 180s and can not be burned to 50 ± 1mm place up to the sample combustion time for the first time occurring, and the record oxygen concentration is Q.
With Q
2Be initial concentration, the speed with 1% increases O
2Concentration repeats
~
Test surpasses 180s or is burned to 50 ± 1mm place up to the sample combustion time for the first time occurring, and the 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) expression oxygen flow mL/s, V (N
2) represent that nitrogen flow mL/s, G represent oxygen index
The present invention imports required flow O through touch screen LED
2And N
2Gas flow, through controller to O
2And N
2Whether the electronics valve of gas is pressed the flow control of being imported and is regulated, and measures temperature with the infrared temperature inductor, characterize sample and light; And the distance of burning, the infrared temperature inductor is transferred to temperature signal on the touch screen LED and observes, and comes measuring samples whether can be burned to 50 ± 1mm place with photoelectric sensor; When sample is burned to 50 ± 1mm place; Can produce certain high light, photoelectric sensor passes to the LED screen through sensitization with live signal; Can observe signal through the LED screen and change, can the reaction sample be burned to 50 ± 1mm place.
The present invention can be used for measuring various materials: like the burning performance of textile, plastics, rubber, timber etc.; The principle of its measurement is with characterizing burning extent and burning time; Can burning length that observe sample arrive 50 ± 1mm place, and can record surpass 180s burning time, through changing O
2And N
2Gas flow is realized.
In the actual measurement, at first rule of thumb estimate an oxygen density value, make an experiment, observe combustion case and burning time.According to different combustion characteristics, change oxygen density value, again through change and trial repeatedly; The change oxygen density value that does not stop; Make the combustion characteristics of sample meet the requirements prescribed, write down the oxygen density value of this moment, calculate the oxygen index value of this sample according to formula.
The invention has the advantages that: to the deficiency of traditional analyzer, after the analyzer digitizing, O
2And N
2The flow of gas is imported required flow, O through touch screen LED
2And N
2Gas flow passes through controller to O
2And N
2Can the electronics valve of gas be pressed the flow control of being imported and is regulated, be burned to 50 ± 1mm place with collector lens and photoelectric sensor multiple measurement sample, and being reacted on the touch screen LED the light signal signal in real time; The convenient observation; Whether the height through temperature of combustion that infrared thermometer is surveyed judge near oxygen index value, and temperature signal is transferred on the touch screen LED observes, and can reduce manual operation greatly and the error that causes; Reduce the labor capacity of test, improve testing efficiency.
Description of drawings
Fig. 1 is the structural representation of analyzer of the present invention
O wherein
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
2Flowmeter measuring device-7, N
2Flowmeter measuring device-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
are done further detailed explanation below in conjunction with accompanying drawing to the present invention, but this explanation can not be construed as limiting the invention.
Digitizing limiting oxygen index determination appearance; 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 through pipeline, and combustion apparatus links to each other with signal input-output device through lead; Signal input-output device links to each other with single-chip microcomputer through lead, and single-chip microcomputer is transferred to the LED touch-screen to information processed through lead;
Air intake apparatus includes O
2Hold-up vessel, N
2Hold-up vessel and gas mixing bunker 11, O
2Hold-up vessel links to each other with the gas mixing bunker through pipeline, is disposed with O on the pipeline
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 links to each other with the gas mixing bunker through pipeline, is disposed with N on the pipeline
2Switch cuts down 2, N
2Gas gauge 4, N
2Transition reduction valve 6, N
2 Electronic flow meter 8 and N
2Electronic switch operation valve 10, O
2And N
2Proportionally flow to the gas mixing bunker, after mixing, flows into combustion equipment;
Described combustion apparatus includes casing 17, portfire and the three groups of subsidiary equipment of not firing; Described subsidiary equipment includes sample clamp 18, flame collector lens, photoelectric sensor 16, infrared temperature inductor 14; Photoelectric sensor is fixed in and does not fire casing one side, 50 ± 1mm apart from tested sample 15 tops, infrared temperature inductor be fixed in do not fire the casing top cover and be positioned at tested sample directly over; The infrared temperature inductor is 30 ± 1mm apart from the tested sample top; Described portfire is removable lighter 12, and activity is installed in a side of not firing casing, guarantees that the flame of removable lighter contacts with the sample top;
The photosignal that temperature signal, photoelectric sensor detected that the flow signal that described electronic flow meter detects, infrared temperature inductor detect is through lead, amplifying circuit and A/D dress parallel operation are connected with single-chip microcomputer 19 separately; Each signal is input in the data processor of single-chip microcomputer and carries out data processing and analysis; The digital signal that obtains after the treated analysis outputs to LED touch-screen 20 and shows monitoring in real time, and is stored into SD card reservoir and saves as experimental data.
Application implementation example 1:
Observe the sample burning behavior, through timer record burning time, whether can be burned to 50 ± 1mm place through photoelectric sensor and infrared temperature inductor record sample, if the sample combustion time perhaps is burned to 50 ± 1mm place above 180s, the record oxygen concentration is Q
1, if the sample combustion time does not surpass 180s and can not be burned to 50 ± 1mm place, the record oxygen concentration is Q
2, burn-out.
With Q
1Be initial concentration, the speed with 1% reduces O
2Concentration repeats
~
Test surpasses 180s and can not be burned to 50 ± 1mm place up to the sample combustion time for the first time occurring, and the record oxygen concentration is Q.
With Q
2Be initial concentration, the speed with 1% increases O
2Concentration repeats
~
Test surpasses 180s or is burned to 50 ± 1mm place up to the sample combustion time for the first time occurring, and the record oxygen concentration is Q.
In oxygen concentration is 21% o'clock, and the burning extent of EPS styrofoam DYD-1 sample is 93mm, and be 78s burning time, and oxygen concentration is 20% o'clock; Burning extent 76mm, be 85s burning time, oxygen concentration is 19% o'clock; Burning extent 56mm, be 112s burning time, is 18% o'clock in oxygen concentration; Burning extent 49mm, be 148s burning time.Calculate according to formula, the oxygen index of EPS styrofoam KH-1 approaches 18.
Application implementation example 2:
Observe the sample burning behavior, through timer record burning time, whether can be burned to 50 ± 1mm place through photoelectric sensor and infrared temperature inductor record sample, if the sample combustion time perhaps is burned to 50 ± 1mm place above 180s, the record oxygen concentration is Q
1, if the sample combustion time does not surpass 180s and can not be burned to 50 ± 1mm place, the record oxygen concentration is Q
2, burn-out.
With Q
1Be initial concentration, the speed with 1% reduces O
2Concentration repeats
~
Test surpasses 180s and can not be burned to 50 ± 1mm place up to the sample combustion time for the first time occurring, and the record oxygen concentration is Q.
With Q
2Be initial concentration, the speed with 1% increases O
2Concentration repeats
~
Test surpasses 180s or is burned to 50 ± 1mm place up to the sample combustion time for the first time occurring, and the record oxygen concentration is Q.
In oxygen concentration is 21% o'clock, and the burning extent of EPS styrofoam DYD-2 sample is 84mm, and be 93s burning time, and oxygen concentration is 20% o'clock; Burning extent 63mm, be 121s burning time, oxygen concentration is 19% o'clock; Burning extent 51mm, be 153s burning time, is 18% o'clock in oxygen concentration; Burning extent 38mm, be 172s burning time.Calculate according to formula, the oxygen index of EPS styrofoam DYD-2 approaches 19.
Application implementation example 3:
Observe the sample burning behavior, through timer record burning time, whether can be burned to 50 ± 1mm place through photoelectric sensor and infrared temperature inductor record sample, if the sample combustion time perhaps is burned to 50 ± 1mm place above 180s, the record oxygen concentration is Q
1, if the sample combustion time does not surpass 180s and can not be burned to 50 ± 1mm place, the record oxygen concentration is Q
2, burn-out.
With Q
1Be initial concentration, the speed with 1% reduces O
2Concentration repeats
~
Test surpasses 180s and can not be burned to 50 ± 1mm place up to the sample combustion time for the first time occurring, and the record oxygen concentration is Q.
With Q
2Be initial concentration, the speed with 1% increases O
2Concentration repeats
~
Test surpasses 180s or is burned to 50 ± 1mm place up to the sample combustion time for the first time occurring, and the record oxygen concentration is Q.
In oxygen concentration is 21% o'clock, and the burning extent of EPS styrofoam DYD-3 sample is 12mm, and be 23s burning time, and oxygen concentration is 22% o'clock; Burning extent 36mm, be 58s burning time, oxygen concentration is 23% o'clock; Burning extent 42mm, be 113s burning time, is 24% o'clock in oxygen concentration; Burning extent 51mm, be 152s burning time.Calculate according to formula, flame retardant type energy-conserving plate material IIP plate oxygen index approaches 24.
Application implementation example 4:
rule of thumb or the aerial combustion case of sample; Oxygen concentration is about 21% in the air, therefore initial lead in oxygen concentration be 21%.
Observe the sample burning behavior, through timer record burning time, whether can be burned to 50 ± 1mm place through photoelectric sensor and infrared temperature inductor record sample, if the sample combustion time perhaps is burned to 50 ± 1mm place above 180s, the record oxygen concentration is Q
1, if the sample combustion time does not surpass 180s and can not be burned to 50 ± 1mm place, the record oxygen concentration is Q
2, burn-out.
With Q
1Be initial concentration, the speed with 1% reduces O
2Concentration repeats
~
Test surpasses 180s and can not be burned to 50 ± 1mm place up to the sample combustion time for the first time occurring, and the record oxygen concentration is Q.
With Q
2Be initial concentration, the speed with 1% increases O
2Concentration repeats
~
Test surpasses 180s or is burned to 50 ± 1mm place up to the sample combustion time for the first time occurring, and the record oxygen concentration is Q.
In oxygen concentration is 21% o'clock, and the burning extent of flame retardant type energy-conserving plate material IIP plate sample is 0mm, and be 0s burning time, and oxygen concentration is 22% o'clock; Burning extent 0mm, be 0s burning time, oxygen concentration is 23% o'clock; Burning extent 2mm, be 0s burning time, is 24% o'clock in oxygen concentration; Burning extent 5mm, be 2s burning time, is 25% o'clock in oxygen concentration; Burning extent 8mm, be 3s burning time, continues to increase oxygen concentration; Burning extent still very short (less than 50mm); Burning time also very little (less than 180s), calculate according to formula, flame retardant type energy-conserving plate material IIP plate is an A level nonflammable material.
Claims (2)
1. digitizing limiting oxygen index determination appearance; 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 through pipeline, and combustion apparatus links to each other with signal input-output device through lead; Signal input-output device links to each other with single-chip microcomputer (19) through lead, and single-chip microcomputer is transferred to the LED touch-screen to information processed through lead;
Air intake apparatus includes O
2Hold-up vessel, N
2Hold-up vessel and gas mixing bunker (11), O
2Hold-up vessel links to each other with the gas mixing bunker through pipeline, is disposed with O on the pipeline
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 links to each other with the gas mixing bunker through pipeline, is disposed with N on the pipeline
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 the gas mixing bunker, after mixing, flows into combustion equipment;
Described combustion apparatus includes casing (17), portfire and at least one group of subsidiary equipment of not firing; Described subsidiary equipment includes sample clamp (18), flame collector lens, photoelectric sensor (16), infrared temperature inductor (14); Photoelectric sensor is fixed in and does not fire casing one side; Apart from tested sample (15) top 50 ± 1mm; The infrared temperature inductor be fixed in do not fire the casing top cover and be positioned at tested sample directly over, the infrared temperature inductor is 30 ± 1mm apart from the tested sample top, described portfire is removable lighter (12); Activity is installed in a side of not firing casing, guarantees that the flame of removable lighter contacts with the sample top;
The photosignal that temperature signal, photoelectric sensor detected that the flow signal that described electronic flow meter detects, infrared temperature inductor detect is through lead, amplifying circuit and A/D dress parallel operation are connected with single-chip microcomputer separately; Each signal is input in the data processor of single-chip microcomputer and carries out data processing and analysis; The digital signal that obtains after the treated analysis outputs to LED touch-screen 20 and shows monitoring in real time, and is stored into SD card reservoir and saves as experimental data.
2. a kind of digitizing limiting oxygen index determination appearance as claimed in claim 1 is characterized in that described subsidiary equipment includes three groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210052812.1A CN102608257B (en) | 2012-03-02 | 2012-03-02 | Digital oxygen index tester |
Applications Claiming Priority (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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| Publication Number | Publication Date |
|---|---|
| CN102608257A true CN102608257A (en) | 2012-07-25 |
| CN102608257B CN102608257B (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210052812.1A Expired - Fee Related CN102608257B (en) | 2012-03-02 | 2012-03-02 | Digital oxygen index tester |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149321A (en) * | 2013-02-25 | 2013-06-12 | 上海长园电子材料有限公司 | Oxygen index test system |
| CN105467065A (en) * | 2015-12-30 | 2016-04-06 | 重庆精榜高分子材料有限公司 | Oxygen index 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 |
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| CN2415358Y (en) * | 2000-02-04 | 2001-01-17 | 山东省纺织科学研究院 | Automatic oxygen index measurer |
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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149321A (en) * | 2013-02-25 | 2013-06-12 | 上海长园电子材料有限公司 | Oxygen index test system |
| CN103149321B (en) * | 2013-02-25 | 2015-04-29 | 上海长园电子材料有限公司 | Oxygen index test system |
| CN105467065A (en) * | 2015-12-30 | 2016-04-06 | 重庆精榜高分子材料有限公司 | Oxygen index tester |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102608257B (en) | 2015-07-22 |
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