CN102661934A - Device and method thereof for rapidly detecting swill-cooked dirty oil - Google Patents
Device and method thereof for rapidly detecting swill-cooked dirty oil Download PDFInfo
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- CN102661934A CN102661934A CN2012101639704A CN201210163970A CN102661934A CN 102661934 A CN102661934 A CN 102661934A CN 2012101639704 A CN2012101639704 A CN 2012101639704A CN 201210163970 A CN201210163970 A CN 201210163970A CN 102661934 A CN102661934 A CN 102661934A
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Abstract
The invention relates to a device and a method thereof for rapidly detecting swill-cooked dirty oil. The device comprises at least one pair of excitation light sources and a light receiving element, which are used for measuring the light transmittance of a sample. A sample test tube is arranged in a temperature control cavity; an output end of a refrigerant fluid tank is connected with the temperature control cavity by using a valve through a pipeline; a temperature control module of a temperature control device outputs a signal to control the valve to open and close; a temperature measurement module measures a temperature in the temperature control cavity in real time through a temperature measurement sensor; and a signal processing module respectively receives output signals of the light receiving element and the temperature measurement sensor, so as to record a temperature and a light transmittance, carry out data process, and output a relevant result of the temperature and the light transmittance. The device provided by the invention can rapidly, accurately and conveniently judge properties of an oil product to be detected in real time by detecting light transmittance signals related to the oil product at different temperatures by utilizing a characteristic that animal fat contents of legal edible oil and the swill-cooked dirty oil are different.
Description
Technical field
The present invention relates to a kind of waste oil device for fast detecting and method thereof; Be particularly related to a kind of animal tallow in certified products edible oil and the waste oil (saturated fat and unsaturated fat) content different features of utilizing; Through detecting under the condition of different temperatures; The transmittance signal that oil product is relevant, realization are judged the pick-up unit and the method thereof of the character of oil product to be checked fast, accurately, conveniently, in real time.
Background technology
So-called " waste oil " is meant that meal kitchen garbage grease serves as edible oil once more through after the processed, and be very big to human health damage.
Before the present invention makes; Chinese invention patent (CN 101975788A) discloses the method that a kind of low-field nuclear magnetic resonance is differentiated the edible oil quality; The discriminating that is applicable to certified products edible oil and waste oil inferior is measured; This method serves as the main foundation of differentiating with the difference of certified products edible oil and waste oil inferior relaxation time spectrum data; NMR signal with certified products edible oil and waste oil inferior is the main object of observation, is the discriminating quick and precisely that main means are carried out certified products edible oil and waste oil with the T2 spectrum data comparative analysis of certified products edible oil and waste oil inferior.This method need be used low-field nuclear magnetic resonance equipment, and instrument costs an arm and a leg, and whole detection must be accomplished in the laboratory, do not have the possibility of operation on the spot, and testing process is longer.
Chinese invention patent (CN102004082A) discloses a kind of waste oil method for quick, and it comprises suction pipe, at least two group luminotron and the receiving tubes of measured oil sensing chamber one side in the closure casing, and suction pipe communicates with measured oil sensing chamber through sucking pump; One group of luminotron and receiving tube one one receipts on same optical axis; Be used to measure the light absorption of measured oil, another group luminotron and receiving tube with less than 90 angles of spending in measured oil sensing chamber one side, the light scattering that is used to measure measured oil; When the operating switch of pressing the housing upper end; Sucking pump in the housing is opened work, and the outer suction pipe of housing is aimed at oil to be detected, and oil to be detected is sucked measured oil sensing chamber; Behind the height that oil to be detected is set to measured oil sensing chamber; Testing circuit control luminotron goes out the light of certain wavelength to fry dried food ingredients to be detected, and the receiving tube through opposite side receives, and testing circuit will detect, analyze the receiving tube signal.This technical scheme is different according to the penetrability of tested oil product and light absorption and qualified edible oil, reaches the purpose of fast detecting, but this spectrometric method has the requirement of strictness, instrument expensive to the environment of use.
Common edible oil is a plant fat, is generally liquid state, and chemical constitution is a unsaturated fatty acid, and in meal kitchen garbage grease, contains a large amount of animal tallows, is generally solid-stately, and chemical constitution is a saturated fatty acid.These two kinds of fat are had any different the difference of the solidifying point that particularly in the varying environment temperature, shows in form.Secondly, for the different manifestations that is absorbed with of spectrum.At present, according to this characteristic be used for fast, accurately, method and device thereof convenient, that in real time waste oil is detected do not appear in the newspapers.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, provide a kind of ability to judge the pick-up unit and the method thereof of oil product to be checked fast, accurately, conveniently, in real time.
The technical scheme that realizes the object of the invention provides a kind of waste oil device for fast detecting, comprises temperature control chamber, refrigeration flow container and temperature measurement and control instrument; Described signal measurement apparatus comprises at least 1 pair of excitation source and photo detector, is used for the transmittance of measuring samples; Sample tube places in the temperature control chamber, and the output terminal of refrigeration flow container is connected with the temperature control chamber through valve through pipeline; Described temperature measurement and control instrument comprises temperature-measuring module, temperature control modules and signal processing module, the switching of the output signal controlling valve of temperature control modules; Temperature-measuring module is measured the temperature in the temperature control chamber in real time through sensor for measuring temperature; Signal processing module receives the output signal of photo detector and sensor for measuring temperature respectively; Record temperature and transmittance carry out data processing, the correlated results of output temperature and transmittance.
Described excitation source is two spectrum.
Utilize the method for described device fast detecting waste oil, comprise the steps:
(1) under normal temperature condition; Certified products edible oil sample is packed in the sample tube; Move into the temperature control chamber, the detection starting program, the temperature control modules by-pass valve control of temperature measurement and control instrument is opened; Refrigerating fluid in the refrigeration flow container is slowly flowed in the temperature control chamber temperature changing down in temperature control modules control temperature control chamber; Temperature-measuring module is measured cavity temperature in real time through placing the temperature sensor in the temperature control chamber; The grease transmittance measurement mechanism that excitation source and photo detector are formed; The output signal of temperature sensor and photo detector is input to signal processing module; Through writing down temperature and the transmittance signal that records; The temperature function curve relevant of this certified products edible oil of treated output with transmittance, and be stored in the data-carrier store of device;
(2) under normal temperature condition, oily sample to be measured is packed in the sample tube, the detection method of (1) detects oily sample to be measured set by step, obtains the temperature function curve relevant with transmittance of this oil to be measured;
(3) according to the oil to be measured function curve relevant with transmittance, differentiate oil properties to be measured fast with the temperature of certified products edible oil.
Described temperature changing down is 0.5～1 ℃/s.
Pick-up unit provided by the invention with the principle of method foundation is: in certified products edible oil and the waste oil because the content of animal tallow is different; Its temperature profile and spectral signature exist evident difference; Under identical temperature conditions, its form different features is employed in the process that temperature descends according to certified products edible oil and waste oil in the present invention; Sample solidifies gradually; Through the transmittance of test sample, form and get curve, thereby animal tallow has or not and content in the judgement detection oil sample with temperature variation.
Compare with existent technique, beneficial effect of the present invention is:
1, utilize the exciting light of two kinds of different wave lengths to survey the absorptivity of sample to light, the transmittance of sample reduces gradually in the progressive formation that temperature descends, and forms gradient ramp, and the result accurately, intuitively.
2, the grease parametric line that detects in real time the known name of an article of storage in the curve that obtained and the machine compares; The mode of employing curve can be understood tested oil sample intuitively and whether contain animal tallow and content thereof, can realize fast, judge accurately, conveniently, in real time oil product to be checked.
Description of drawings
Fig. 1 is the structural representation of a kind of waste oil device for fast detecting of providing of the embodiment of the invention;
Fig. 2 is transmitance and the curve map of temperature variation correlativity of light of the different wave length of the detection device records that provides of the embodiment of the invention;
Wherein, 1, sample tube; 2., temperature control chamber; 3, photo detector; 4, temperature measurement and control instrument; 5, testing sample; 6, refrigeration flow container; 7, valve; 8, excitation source (two spectrum).
Embodiment
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is done further to set forth.
Embodiment 1
Referring to accompanying drawing 1; It is the structural representation of the waste oil device for fast detecting that provides of present embodiment; In the present embodiment, signal measurement apparatus comprises that 1 pair of spectrum is respectively the two excitation of spectra light sources 8 and photo detector 3 of 850nm and 440nm, the transmittance of measuring samples; The sample tube 1 that testing sample 5 is housed places in the temperature control chamber 2, and the output terminal of refrigeration flow container 6 is connected with temperature control chamber 2 through cold-producing medium valve 7 through pipeline; Temperature measurement and control instrument 4 comprises temperature-measuring module, temperature control modules and signal processing module, the switching of the output signal controlling cold-producing medium valve 7 of temperature control modules; Temperature-measuring module is measured the temperature in the temperature control chamber 2 in real time through sensor for measuring temperature, and signal processing module receives the output signal of photo detector 3 and sensor for measuring temperature respectively, record, processing and the output temperature function curve relevant with transmittance.
In the present embodiment, using snow kind with automobile jar serves as the refrigeration flow container, and the glass test tube of getting internal diameter and be 8mm, length and be 60mm is a sample tube, inserts port earlier and has in the rubber seal ring temperature control chamber, measures the background values of the transmittance of this glass test tube.Then, inject the doubtful sample of waste oil of 4/5 capacity, the detection starting program selects corresponding known parameters curve display in the operation screen.Temperature controller is opened gas filling valve gradually, and refrigerating fluid charges in the chamber gradually in will avenging kind jar, and temperature decreases, and rate of temperature fall is 1 ℃/S, and two kinds of light sources see through sample, arrive photo detector.Every reduction detects a transmittance for 1 ℃, adopts two excitation of spectra light sources, can write down two measured values simultaneously, and data show on the operation screen, are depicted as curve.Solidify until grease, transmittance is near minimum.Do the normalization processing, the output testing result to detecting the data that obtain.
Referring to accompanying drawing 2, it is the curve map of the light of the pick-up unit that provides of present embodiment different wave length of record when measuring through the transmitance and the temperature variation correlativity of sample; Among the figure, curve a and b are respectively standard oil to the temperature variant transmittance curve of the light of 440nm and 850nm; Curve c and d are respectively oil product to be measured to the temperature variant transmittance curve of the light of 440nm and 850nm.Each curve by among Fig. 2 can find out that doubtful sample and standard grease are along with variation of temperature, and their light transmittance has tangible difference, and this fast detecting result can be used as the auxilliary card of administrative authority as doubtful waste oil sample qualitative discrimination.
Claims (4)
1. a waste oil device for fast detecting is characterized in that: comprise temperature control chamber, refrigeration flow container and temperature measurement and control instrument; Described signal measurement apparatus comprises at least 1 pair of excitation source and photo detector, is used for the transmittance of measuring samples; Sample tube places in the temperature control chamber, and the output terminal of refrigeration flow container is connected with the temperature control chamber through valve through pipeline; Described temperature measurement and control instrument comprises temperature-measuring module, temperature control modules and signal processing module, the switching of the output signal controlling valve of temperature control modules; Temperature-measuring module is measured the temperature in the temperature control chamber in real time through sensor for measuring temperature; Signal processing module receives the output signal of photo detector and sensor for measuring temperature respectively; Record temperature and transmittance carry out data processing, the correlated results of output temperature and transmittance.
2. a kind of waste oil device for fast detecting according to claim 1 is characterized in that: excitation source is two spectrum.
3. a method of utilizing the described device fast detecting of claim 1 waste oil is characterized in that comprising the steps:
(1) under normal temperature condition; Certified products edible oil sample is packed in the sample tube; Move into the temperature control chamber, the detection starting program, the temperature control modules by-pass valve control of temperature measurement and control instrument is opened; Refrigerating fluid in the refrigeration flow container is slowly flowed in the temperature control chamber temperature changing down in temperature control modules control temperature control chamber; Temperature-measuring module is measured cavity temperature in real time through placing the temperature sensor in the temperature control chamber; The grease transmittance measurement mechanism that excitation source and photo detector are formed; The output signal of temperature sensor and photo detector is input to signal processing module; Through writing down temperature and the transmittance signal that records; The temperature function curve relevant of this certified products edible oil of treated output with transmittance, and be stored in the data-carrier store of device;
(2) under normal temperature condition, oily sample to be measured is packed in the sample tube, the detection method of (1) detects oily sample to be measured set by step, obtains the temperature function curve relevant with transmittance of this oil to be measured;
(3) according to the oil to be measured function curve relevant with transmittance, differentiate oil properties to be measured fast with the temperature of certified products edible oil.
4. the method for a kind of fast detecting waste oil according to claim 3 is characterized in that: described temperature changing down is 0.5～1 ℃/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101639704A CN102661934A (en) | 2012-05-24 | 2012-05-24 | Device and method thereof for rapidly detecting swill-cooked dirty oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101639704A CN102661934A (en) | 2012-05-24 | 2012-05-24 | Device and method thereof for rapidly detecting swill-cooked dirty oil |
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| CN2012101639704A Pending CN102661934A (en) | 2012-05-24 | 2012-05-24 | Device and method thereof for rapidly detecting swill-cooked dirty oil |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07244004A (en) * | 1994-03-01 | 1995-09-19 | Nippon Oil & Fats Co Ltd | Automatic light transmittance-measuring apparatus |
| CN1162117A (en) * | 1996-04-09 | 1997-10-15 | 兰州大学 | Method for determinating solidifying point of liquid and device thereof |
| US5818731A (en) * | 1995-08-29 | 1998-10-06 | Mittal; Gauri S. | Method and apparatus for measuring quality of frying/cooking oil/fat |
| CN102004081A (en) * | 2010-11-11 | 2011-04-06 | 西安融慧专利产品开发咨询有限责任公司 | Handheld type swill-cooked dirty oil rapid detecting method |
| CN202583065U (en) * | 2012-05-24 | 2012-12-05 | 苏州大学 | Device for quickly detecting illegal cooking oil |
-
2012
- 2012-05-24 CN CN2012101639704A patent/CN102661934A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07244004A (en) * | 1994-03-01 | 1995-09-19 | Nippon Oil & Fats Co Ltd | Automatic light transmittance-measuring apparatus |
| US5818731A (en) * | 1995-08-29 | 1998-10-06 | Mittal; Gauri S. | Method and apparatus for measuring quality of frying/cooking oil/fat |
| CN1162117A (en) * | 1996-04-09 | 1997-10-15 | 兰州大学 | Method for determinating solidifying point of liquid and device thereof |
| CN102004081A (en) * | 2010-11-11 | 2011-04-06 | 西安融慧专利产品开发咨询有限责任公司 | Handheld type swill-cooked dirty oil rapid detecting method |
| CN202583065U (en) * | 2012-05-24 | 2012-12-05 | 苏州大学 | Device for quickly detecting illegal cooking oil |
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Application publication date: 20120912 |