CN1932495A - Edible vegetable oil and fat smoke point automatic analyzer - Google Patents
Edible vegetable oil and fat smoke point automatic analyzer Download PDFInfo
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- CN1932495A CN1932495A CN 200610096491 CN200610096491A CN1932495A CN 1932495 A CN1932495 A CN 1932495A CN 200610096491 CN200610096491 CN 200610096491 CN 200610096491 A CN200610096491 A CN 200610096491A CN 1932495 A CN1932495 A CN 1932495A
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Abstract
The invention involves a kind of edible plant grease smoke to order an automatic measurement instrument. Measuring the instrument establishes a smoke examination box, examination box from box body, light source, lens, light column, the light detector, cigarette holder, light trap, gasp device to constitute; The ray of light source radiation is through the lens also focuses through a light column in the cigarette holder above, the smoke spreads to shoot output light signal to pass light the column focuses through the lens at light detector up; Be examining light road anti- to extension on-line establish light trap; Cigarette holder just above in order to gasp device, cigarette holder with gather a smoke cover to connect with each other, under one by one in order is sample cup, heating apparatus, the temperature spreads a feeling machine to place in sample cup, is carried out smoke by the single slice machine to order an automatic measurement. Its advantage BE: Light source and light detector aren't on a straight line, adopting light trap in the meantime, raising an examination of intelligent degree and accuracy; The pollution established to shield to lead to flow bore, gasped device and lined up dirty bore, avoided soot to give or get an electric shock a component to the light, let up temperature to the influence which gives or gets an electric shock a component only, raised instrument accuracy and service life.
Description
Technical field
The present invention relates to the instrument that a kind of oil and fat smoke point is measured.The edible vegetable oil and fat smoke point automatic analyzer that smoke point in the edible vegetable oil and fat heating process is measured automatically particularly.
Background technology
Oil and fat smoke point is meant the minimum temperature when naked eyes can be seen when grease was heated thermal decomposition product or impurity volatilize continuously, is one of index of its thermal stability being weighed when being heated of grease.In China's edible vegetable oil quality standard with oil and fat smoke point as one of important quality index of one-level oil.At present, China's oil and fat smoke point determining instrument is quite backward, still adopts the manual control grease to heat up, the eye-observation oil smoke, and read the mode of oil temperature by thermometer.Because when arriving smoke point in the grease heating process, the cigarette amount of generation is very little, and has certain emergentness, in the practical operation, the judgement of smoke point varies with each individual, and has very big subjectivity, and measured deviation is bigger, causes dispute often.Grease production enterprise, grain and oil quality inspection institute (station) that China is numerous, and grease consumer, all urgent hope development is a kind of to realize the robotization of smoke point mensuration to the automatic instrument of measuring of oil and fat smoke point, thoroughly artificial, the equipment error of elimination.
In November, 2003, Chinese patent discloses the utility model patent that a name is called " smoke point detects sensing device and automatic smoke point analyzer ", (patent No. is ZL 02284600.X), its technical scheme main points are: " a kind of smoke point detects sensing device; contain the petticoat pipe that is communicated with smoke pipe; at the two ends of orthoscopic smoke pipe photocell and light receiving element are housed, the smoking road that has air pump that is communicated with it is housed on smoke pipe.”
Find out that from this patent specification the detection principle of this technology is: after the grease heating, when smog rises through smoke pipe, block (absorption) from the light that photocell sends, the light intensity that light receiving element is received descends, and judges smoke point according to the variation of light signal.Can there be following problem in this technology when implementing: the 1. pyrolysate quality difference that produces in the edible vegetable oil and fat heating process of different cultivars, different qualities, and smokescope can be different, and it blocks and absorbing light degree difference, and smoke point is judged difficulty.2. detect in the sensing device, photovalve is in the smoke pipe, though air extractor and antifouling hole are arranged, but can only reduce to eliminate of the pollution of grease smog to photovalve, can not eliminate the pollution to smoke pipe, after photovalve and smoke pipe were contaminated, detected signal was inevitable inaccurate.3. photovalve is in smoke pipe, and along with the grease heat temperature raising, the temperature of photovalve also rises, and performance parameter variations can be brought influence to detection.
Summary of the invention
The objective of the invention is to solve the problem that prior art exists, a kind of instrument of can be automatically, accurately and rapidly edible vegetable oil and fat smoke point being measured is provided.
The object of the present invention is achieved like this: a kind of edible vegetable oil and fat smoke point automatic analyzer is characterized in that:
A) be provided with a Smoke Detection case, the Smoke Detection case is made up of casing, light source, lens, Guang Lan, photodetector, cigarette holder, light trapping, air extractor;
B) light of radiation of light source focuses on through lens and by the light hurdle directly over the cigarette holder, the light signal that produces through the smog scattering by the light hurdle through lens focus on photodetector, the angle α that forms between the above-mentioned light path is 30～150 degree;
C) on detection light path reverse extending line, be provided with light trapping;
D) cigarette holder of Smoke Detection case links to each other with exhaust fume collecting hood, and the exhaust fume collecting hood below is followed successively by sample cup, well heater, is provided with air extractor directly over the cigarette holder, and air extractor is installed on the casing top;
E) temperature sensor places sample cup;
F) be provided with the automatic measuring and controlling circuit.
At the light source described in the technical program is ultraviolet source, or visible light source; Described photodetector is: photomultiplier, or photoelectric tube.
At the light source component described in the technical program be: mercury lamp or deuterium lamp or xenon lamp or halogen tungsten lamp.
Tank wall is upper in the technical program is provided with antifouling hole on every side in light path; Be provided with the shielding pod apertures around being positioned at cigarette holder at the bottom of the case.
Be fixed on the lifting table at the well heater described in the technical program.
At the temperature sensor described in the technical program is film platinum resistor, or thermopair.
The invention has the advantages that: because light source and photodetector are not point-blank, adopt light trapping to avoid the interference of veiling glare simultaneously, improved the sensitivity and the accuracy that detect; Adopt shielding pod apertures, air extractor to form closed flue, be provided with mudhole simultaneously, avoided the pollution of oil smoke to light source and detecting device, reduced temperature variation to light source and photodetector, especially to the adverse effect of the parameter generating of photodetector, improved accuracy of instrument, prolonged the instrument life-span; The automatic measuring and controlling circuit is core with the single-chip microcomputer, realizes the detection of oil temperature, heat temperature raising control, Smoke Detection and oil and fat smoke point judgement; The apparatus structure compactness.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 be among Fig. 1 A-A to view.
Fig. 3 is the electric theory diagram of a kind of automatic measuring and controlling circuit of relating to of the embodiment of the invention.
Among Fig. 1, Fig. 2: 1, casing, 2, air extractor, 3, cigarette holder, 4, light trapping, 5, lifting table, 6, well heater, 7, temperature sensor, 8, sample cup, 9, exhaust fume collecting hood, 10, shielding pod apertures, 11, antifouling hole, 12, Guang Lan, 13, lens A, 14, photodetector, 15, light source, 16, lens B.
Embodiment
Accompanying drawing is nonrestrictive to disclose a specific embodiment of the present invention, and the invention will be further described below in conjunction with accompanying drawing.
By Fig. 1 Fig. 2 as seen: edible vegetable oil and fat smoke point automatic analyzer is provided with a Smoke Detection case, the Smoke Detection case comprises casing 1, light source 15, lens A13, lens B16, light hurdle 12, photodetector 14, cigarette holder 3, light trapping 4 and air extractor 2, wherein: the light hurdle 12 of light path process is provided with unthreaded hole, the light of light source 15 radiation focuses on directly over the cigarette holder 3 through lens B16 and by the unthreaded hole in the light hurdle 12, the light signal that the smog scattering produces focuses on the photodetector 14 through lens A13 by the unthreaded hole in the light hurdle 12, and the angle α that forms between the above-mentioned light path is 30～150 degree; Light trapping 4 is located at and detects on the light path reverse extending line; The cigarette holder 3 of Smoke Detection case links to each other with exhaust fume collecting hood 9, and exhaust fume collecting hood 9 belows are followed successively by sample cup 8, well heater 6, and cigarette holder 3 tops are air extractor 2, and air extractor 2 is installed on casing 1 top; Temperature sensor 7 places sample cup 8; Edible vegetable oil and fat smoke point automatic analyzer also should be provided with the automatic measuring and controlling circuit.In the present embodiment: light source 15 adopts mercury lamp, for example: GP3Hg; Photodetector 14 has adopted photomultiplier, for example: the GDB-152B type; Temperature sensor 7 is selected film platinum resistor Pt100; The casing 1 of light path process is provided with antifouling hole 11; Be provided with shielding pod apertures 10 at the bottom of the case around the cigarette holder 3; Sample cup 8 is fixed and placed to temperature sensor 7 by exhaust fume collecting hood 9; Described well heater 6 is fixed on the lifting table 5, and described lifting table 5 is to realize lifting by motor drives screw drive lifting table 5.For fear of of the interference of extraneous light, be provided with the light shielding mask tube in the light path that is in casing 1 outside to photodetector 14.
During concrete enforcement, light source 15 can also adopt other ultraviolet source or visible light source, for example: deuterium lamp or xenon lamp or halogen tungsten lamp; Photodetector 14 can also adopt photoelectric tube; Temperature sensor 7 can also be selected thermopair; Lifting table 5 can pass through other forms of mechanical elevating.
Fig. 3 is the automatic measuring and controlling schematic block circuit diagram that the embodiment of the invention relates to.The automatic measuring and controlling circuit is core with the single-chip microcomputer, realizes the detection of oil temperature, heat temperature raising control, Smoke Detection and oil and fat smoke point judgement.Pt100 is the temperature sensor 7 that places sample cup among the figure, and it cooperates temperature transmitter to convert temperature signal to electric signal.Photomultiplier is a photodetector 14 among the figure, and it is used for the light signal of oil smoke scattering is converted to electric signal.It is digital signal that analog to digital converter is used for electrical signal conversion.Below in conjunction with the automatic measuring and controlling circuit course of work of the present invention is described below:
At first the sample edible vegetable oil and fat is placed sample cup 8, regulate the height of sample cup 8 by lifting table 5, guarantee that temperature sensor 7 places the sample in the sample cup 8, the smog that simultaneously sample is produced in testing process can enter casing 1 by cigarette holder 3 by exhaust fume collecting hood 9.
Start the automatic measuring and controlling circuit then, import information such as edible vegetable oil and fat sample number into spectrum to be measured by keyboard, under the control of single-chip microcomputer, begin to heat up by the relay control heater; Single-chip microcomputer is sent the output signal of oil temperature signal and photomultiplier into analog to digital converter by the control analog switch, carries out analog to digital conversion; By reading the analog to digital conversion result, chip microcontroller is to the real-time detection of the gentle photosignal of oil.Because light source 15 and photodetector 14 be not on same straight line, photodetector 14 can not directly receive the signal of light source 15, be lower than heating period of smoke point at tested edible vegetable oil and fat sample temperature, do not have smog in the casing 1, photodetector 14 does not receive light signal; In case tested edible vegetable oil and fat sample temperature can produce continuous smog after arriving smoke point, smog enters in the casing 1 via cigarette holder 3 by exhaust fume collecting hood 9, produces scattered light signal under the effect of light source 15; Scattered light signal is focused on the photodetector 14 by lens A13; The parasitic light signal that tank wall and surrounding environment produce is absorbed by set light trapping 4; After photodetector 14 receives scattered light signal, the output electric signal, single-chip microcomputer detects this electric signal in real time, and the oily temperature that records this moment is defined as the smoke point of tested edible vegetable oil and fat, stop to heat by the relay control heater then, pass through buzzer warning; Under the control of single-chip microcomputer, show and the printing test result, that is: demonstrate the smoke point temperature value by LCD display, go out test result by printer prints.
In the automatic measuring and controlling circuit that the present invention relates to: optional high performance 8 single-chip microcomputers of single-chip microcomputer, for example: P89C51RD2; Or 16 single-chip microcomputers, for example: 80C196; Or 32 single-chip microcomputers, for example: ARM7:S3C44B0X.Optional 12 A/D converters of analog to digital converter among the figure, for example: MAX197, or V/F converter, for example: AD620.Analog switch optional 4053 among the figure.Optional 12864 dot-matrix lcd modules of LCD display.The optional solid-state relay of relay, for example: S208 IK.The cast aluminium electrothemic plate of the optional power 400W of well heater.
Claims (6)
1, a kind of edible vegetable oil and fat smoke point automatic analyzer is characterized in that:
A) be provided with a Smoke Detection case, the Smoke Detection case is made up of casing, light source, lens, Guang Lan, photodetector, cigarette holder, light trapping, air extractor;
B) light of radiation of light source focuses on through lens and by the light hurdle directly over the cigarette holder, the light signal that produces through the smog scattering by the light hurdle through lens focus on photodetector, the angle α that forms between the above-mentioned light path is 30～150 degree;
C) on detection light path reverse extending line, be provided with light trapping;
D) cigarette holder of Smoke Detection case links to each other with exhaust fume collecting hood, and the exhaust fume collecting hood below is followed successively by sample cup, well heater, is provided with air extractor directly over the cigarette holder, and air extractor is installed on the casing top;
E) temperature sensor places sample cup;
F) be provided with the automatic measuring and controlling circuit.
2, edible vegetable oil and fat smoke point automatic analyzer according to claim 1 is characterized in that: described light source is a ultraviolet source, or visible light source; Described photodetector is: photomultiplier, or photoelectric tube.
3, according to claim 1 and 2 described edible vegetable oil and fat smoke point automatic analyzers, it is characterized in that: described light source component is: mercury lamp or deuterium lamp or xenon lamp or halogen tungsten lamp.
4, edible vegetable oil and fat smoke point automatic analyzer according to claim 1 and 2 is characterized in that: the tank wall around the light path is provided with antifouling hole; Be provided with the shielding pod apertures at the bottom of the case around the cigarette holder.
5, edible vegetable oil and fat smoke point automatic analyzer according to claim 1 is characterized in that: described well heater is fixed on the lifting table.
6, edible vegetable oil and fat smoke point automatic analyzer according to claim 1 is characterized in that: described temperature sensor is a film platinum resistor, or thermopair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610096491XA CN100526869C (en) | 2006-09-28 | 2006-09-28 | Edible vegetable oil and fat smoke point automatic analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610096491XA CN100526869C (en) | 2006-09-28 | 2006-09-28 | Edible vegetable oil and fat smoke point automatic analyzer |
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| Publication Number | Publication Date |
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| CN1932495A true CN1932495A (en) | 2007-03-21 |
| CN100526869C CN100526869C (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB200610096491XA Expired - Fee Related CN100526869C (en) | 2006-09-28 | 2006-09-28 | Edible vegetable oil and fat smoke point automatic analyzer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865154A (en) * | 2015-06-01 | 2015-08-26 | 苏州菲尼克斯质检仪器有限公司 | Smoke density test device |
| CN104990949A (en) * | 2015-08-07 | 2015-10-21 | 太仓市隆纺油剂有限公司 | Device for testing smoking temperature of various raw materials in oiling agent |
| CN107132202A (en) * | 2016-12-20 | 2017-09-05 | 苏州赛德福科学仪器有限公司 | A kind of EISD |
| CN107219197A (en) * | 2016-12-20 | 2017-09-29 | 苏州赛德福科学仪器有限公司 | A kind of sensing chamber of EISD |
| CN107402230A (en) * | 2017-08-01 | 2017-11-28 | 昆明理工大学 | One tobacco articles smokescope measurement apparatus and method |
| CN108760687A (en) * | 2018-04-08 | 2018-11-06 | 深圳市天环通科技有限公司 | Laser light scattering cooking fume instrument |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087980A (en) * | 1992-12-07 | 1994-06-15 | 吴泉兴 | Automatic cigarete igniting device |
| US5849596A (en) * | 1996-07-08 | 1998-12-15 | Food Industry Research And Development Institute | Process for determining the smoke content of edible oil |
| CN2397489Y (en) * | 1999-12-02 | 2000-09-20 | 中国科学院上海光学精密机械研究所 | Laser dust measurer optical probe |
| CN2585226Y (en) * | 2002-12-06 | 2003-11-05 | 郑州三信机房电子技术有限公司 | Smoke point investigating sensor and its autoamtic smoke point investigator |
| FR2880426B1 (en) * | 2004-12-30 | 2007-04-06 | Total France Sa | METHOD AND DEVICE FOR DETERMINING THE SMOKE POINT OF HYDROCARBONS |
| CN200986531Y (en) * | 2006-09-28 | 2007-12-05 | 南京财经大学 | Edible plant oil smoke point automatic determinator |
-
2006
- 2006-09-28 CN CNB200610096491XA patent/CN100526869C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865154A (en) * | 2015-06-01 | 2015-08-26 | 苏州菲尼克斯质检仪器有限公司 | Smoke density test device |
| CN104990949A (en) * | 2015-08-07 | 2015-10-21 | 太仓市隆纺油剂有限公司 | Device for testing smoking temperature of various raw materials in oiling agent |
| CN107132202A (en) * | 2016-12-20 | 2017-09-05 | 苏州赛德福科学仪器有限公司 | A kind of EISD |
| CN107219197A (en) * | 2016-12-20 | 2017-09-29 | 苏州赛德福科学仪器有限公司 | A kind of sensing chamber of EISD |
| CN107132202B (en) * | 2016-12-20 | 2023-10-27 | 苏州赛德福科学仪器有限公司 | Evaporation light scattering detector |
| CN107402230A (en) * | 2017-08-01 | 2017-11-28 | 昆明理工大学 | One tobacco articles smokescope measurement apparatus and method |
| CN107402230B (en) * | 2017-08-01 | 2023-09-26 | 昆明理工大学 | Tobacco product smoke concentration measuring device and method |
| CN108760687A (en) * | 2018-04-08 | 2018-11-06 | 深圳市天环通科技有限公司 | Laser light scattering cooking fume instrument |
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| Publication number | Publication date |
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| CN100526869C (en) | 2009-08-12 |
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Granted publication date: 20090812 Termination date: 20120928 |