CN107064023A - A kind of grease color detecting system and method - Google Patents
A kind of grease color detecting system and method Download PDFInfo
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- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
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Abstract
The present invention provides a kind of grease color detecting system and method, and the system includes light processor and computing device, and the light processor includes light source, the first collimation lens, sample cell, cuvette, post mirror, grating and linear CCD sensor.Grease color detecting system and method that the present invention is provided, light path is built according to the respective characteristic of optical element, spectroscopic data is gathered using linear CCD sensor, and spectroscopic data is passed through into the incoming computing device of USB data line, the curve of spectrum for measuring the grease to be measured is marked by mercury lamp, spectrum analysis is carried out using logarithm method, the chromatic value of grease to be measured is calculated.Compared with existing Lovibond test, realize grease color automatic measurement, it is to avoid the influence of human error and environmental factor in visual measurement process, improve measurement accuracy and measuring speed；The measuring method of average is taken using multiple measurement, the reliability of measurement result is improved.
Description
Technical field
The present invention relates to photoelectric detection technology field, more particularly, to a kind of grease color detecting system and method.
Background technology
The quality of oil quality is related to healthy and China's grease sales situation of people, and its quality turns into influence
The key factor of oil plant and oils industry competitiveness.Color and luster defines the level as grease, fix a price and consumer chooses the important outer of oil plant
Foundation is seen, is one of the important indicator of oil quality detection.Measure to grease color can improve grease processing technique and bar
Part, is that food industry safely provides guarantee and strengthens China's foreign trade.
At present, Lovibond color device is the international uniform standard for measuring color with oil color, and lovibond test is counted as Luo Wei
The corresponding instrument of friend's color device, is the grease detecting instrument passed through in the world at present.Lovibond test uses visual side
Method matches oil sample color with the synthesis color of Lovibond standard colorimetric piece, is also the substantially square of China's oil quality detection
Method.
But artificial visual method is used, it is too high to observer's vision requirement, there is inevitable manual measurement deviation, measure
As a result easily influenceed by gauger and measuring environment；In addition, visual method operating process is cumbersome, automaticity is low, work
Intensity is big, it is impossible to continuously measured；Simultaneously as color chips combination is complicated, prolonged measurement can cause Lovibond color
Piece misalignment.
Tintometer companies of Britain have developed AF960 auto colorimeters in 1984, but research finds this colorimeter
Good correlation can not be formed with visual colorimeter, it is impossible to be widely used.The online automatic spectrums of KC-560 that Japan develops
Color with oil color analyzer, because its is expensive, measuring environment requires high, is only used for the measurement of factory or laboratory grease.
1996, the U.S., Canada waited the online colorimeter PFX990 of enhancing that 12 countries develop jointly, its red value and lovibond test
In respect of preferable correlation.At present, the external High Precision Automatic colorimeter PFX995 generally developed using Tintometer companies
Series carries out the measurement of grease color, and this electronics colorimeter is expensive, is unsatisfactory for the current edible oil grade defining standard of China.
The domestic automatic colorimetric method determined for grease color mainly has photoelectric integral method and AAS at present.Light
The principle of electrical integration is to simulate the tristimulus values characteristic of human eye, using photoelectric integration method, directly measures the tristimulus of color
Value, so as to calculate the color of detected materials.Photoelectric integration colour photometer mainly has light source, detector, data processor and output single
First four parts composition.Because its absolute measurement precision to color is not high, it is mainly used in measuring the colour-difference of two articles.Light splitting light
Degree method be not the tristimulus values of direct measurement color in itself, but by measure light source spectral power distribution calculate color three
Values.Mainly it is made up of monochromator and detector two parts.But because its development cost is high, this colorimeter does not realize production
Product.
The content of the invention
There is provided a kind of grease color detecting system and method for drawbacks described above of the invention to solve prior art.
On the one hand, the present invention provides a kind of grease color detecting system, including light processor and computing device, the light
Processing unit includes light source, the first collimation lens, sample cell, cuvette, post mirror, grating and linear CCD sensor；At the light
Reason device is electrically connected with the computing device；
Grease to be measured is housed, the cuvette is positioned in the sample cell in the cuvette；The light that light source is sent
Through the first collimation lens and sample cell, linear CCD sensor composition optical path is reached through post mirror after optical grating diffraction；
The computing device, for the spectroscopic data gathered according to linear CCD sensor, is measured described by mercury lamp mark
The curve of spectrum of grease to be measured, and spectrum analysis is carried out using logarithm method, calculate the chromatic value of grease to be measured.
Wherein, the light processor also includes optics aperture, adjustable slit, the second collimation lens and the 3rd collimation thoroughly
Mirror, the optics aperture includes the first optics aperture and the second optics aperture；
Second collimation lens, adjustable slit and the 3rd collimation lens are successively set on the sample cell and the post mirror
Between, the adjustable slit is located at the point of intersection of the light by the second collimation lens；The first optics aperture is arranged on institute
State between the first collimation lens and the sample cell, the second optics aperture is arranged on the sample cell and second collimation
Between lens.
Wherein, the computing device, is additionally operable to the chromatic value according to the grease to be measured, judges the grade of oil product.
Wherein, the light processor is positioned in camera bellows, and the surface of the camera bellows connects provided with switch, power interface, USB
Mouth and sample place entrance, and the light source is iodine-tungsten lamp.
Wherein, the computing device is electrically connected by USB data line with the light processor, and the computing device is meter
Calculation machine or tablet personal computer.
On the other hand, the present invention also provides a kind of grease color detection method, including：
Step S1, selects stable light source, and the cuvette that will be equipped with grease to be measured is placed in sample cell；
Step S2, the spectroscopic data of linear CCD sensor collection passes through mercury lamp mark through the incoming computing device of USB data line
Note measures the curve of spectrum of the grease to be measured；
Step S3, computing device carries out spectrum analysis according to the curve of spectrum of the grease to be measured using logarithm method, calculates
The chromatic value of grease to be measured.
Wherein, methods described also includes, and according to the chromatic value of the grease to be measured, judges the grade of the grease.
Wherein, it is described to mark the curve of spectrum for measuring the grease to be measured to include by mercury lamp：
Low pressure mercury lamp is put into sample cell, after device is powered, the mercury characteristic spectral line of low pressure mercury lamp is obtained, according to described low
The mercury characteristic spectral line of pressure mercury lamp, is calibrated to linear CCD sensor, calculates the linear corresponding relation of CCD wavelength and pixel；
Know the wavelength at mercury lamp light source crest, find the coordinate of the corresponding pixel of two groups of crests, obtaining line array CCD by fitting senses
Relation between device wavelength/pixel, the curve of spectrum that linear CCD sensor is measured is converted into light intensity/ripple by light intensity/pixel relationship
Long relation, so as to obtain the curve of spectrum of grease to be measured.
Wherein, in the step S3, the use logarithm method carries out spectrum analysis, calculates the chromatic value bag of grease to be measured
Include：
Step S31, measurement n.s when transmitted light intensity with wavelength change TIt is emptyOil sample to be measured, is then put into by (λ)
Sample cell measures sample spectra TSample(λ), two spectrum are divided by and obtain the transmitted spectrum T of sample；
Step S32, by transmitted spectrum, T points are wavelength selective transmission part T (λ) and common transmissive portion T0, find and surveyed
Sample transmission spectrum T maximum of T0, calculate wavelength selective transmission fractional transmission spectrum T (λ)=T/T0, R, Y are measured, B numerical value is
10 wavelength selective transmission spectrum, calculates logarithmic form spectrum logY10(λ)、logR10(λ) and logB10(λ), wherein, R, Y, B number
Value unit is Lovibond unit；
Step S33, calculates the chromatic value of grease to be measured：
In formula, r, y, b, w are the chromatic value of each color of grease to be measured；λ max are visible wavelength maximum；λ min are can
See optical wavelength minimum value；T0For common transmissive portion in transmitted spectrum；Y10For Y10The maximum of (λ) curve of spectrum；R10For R10
The maximum of (λ) curve of spectrum；B10For B10The maximum of (λ) curve of spectrum.
Wherein, the spectroscopic data of the linear CCD sensor multi collect sample；Accordingly, the computing device according to
Multi collect to spectroscopic data average, marked by mercury lamp and measure the curve of spectrum of the grease to be measured, and using pair
Number method carries out spectrum analysis, calculates the chromatic value of the grease to be measured.
Grease color detecting system and method that the present invention is provided, build light path according to the respective characteristic of optical element, make
Spectroscopic data is gathered with linear CCD sensor, and spectroscopic data is passed through into mercury lamp mark by the incoming computing device of USB data line
Note measures the curve of spectrum of the grease to be measured, and spectrum analysis is carried out using logarithm method, calculates the chromatic value of grease to be measured.With showing
Some Lovibond tests are compared, realize grease color automatic measurement, it is to avoid human error in visual measurement process and
The influence of environmental factor, reduces labor intensity, improves measurement accuracy and measuring speed；The survey of average is taken using multiple measurement
Amount method, improves the reliability of measurement result.
The present invention directly handles spectrum using logarithm method, reduces and is retrieved Lovibond standard color chips deposit database
Matching the consumed time, arithmetic speed is improved, the working time is saved.The grease color detecting system that the present invention is provided,
Compact hardware, cost is low, meets China's edible oil grade defining standard, and performance is stable, can continuously measure.
Brief description of the drawings
Fig. 1 is according to grease color detecting system hardware structure diagram provided in an embodiment of the present invention；
Fig. 2 is according to grease color detection method schematic flow sheet provided in an embodiment of the present invention；
In figure：1：Light source；2：First collimation lens；3：Directional light；4：First optics aperture；5：Sample cell；6：Second light
Learn aperture；7：Second collimation lens；8：Adjustable slit；9：Grating；10：Post mirror；11：Linear CCD sensor；12：Usb data
Line；13：Computing device；14：3rd collimation lens.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is explicitly described, it is clear that described embodiment be the present invention
A part of embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, the scope of protection of the invention is belonged to.
Fig. 1 is according to grease color detecting system hardware structure diagram provided in an embodiment of the present invention.As shown in figure 1, grease
Color and luster detecting system includes light processor and computing device, and the light processor includes light source 1, the first collimation lens 2, sample
Product groove 5, cuvette, post mirror 10, grating 9 and linear CCD sensor 11；The light processor carries out electricity with the computing device
Connection；
Grease to be measured is housed, the cuvette is positioned in the sample cell 5 in the cuvette；The light that light source 1 is sent
Line passes through the first collimation lens 2 and sample cell 5, and reaching linear CCD sensor 11 through post mirror 10 after the diffraction of grating 9 constitutes survey
Measure light path；
The computing device 13, for the spectroscopic data gathered according to linear CCD sensor 11, is measured by mercury lamp mark
The curve of spectrum of the grease to be measured, and spectrum analysis is carried out using logarithm method, calculate the chromatic value of grease to be measured.
Charge coupling device CCD image sensor (Charge Coupled Device), it uses a kind of ISO
Semi-conducting material is made, and light can be transformed into electric charge, and data signal, data signal warp are converted into by analog-digital converter chip
Preserved after overcompression by the flash memory or built-in hard disk card of camera internal, thus can be easily data transfer
To computer, and by means of the processing means of computer, image is changed with imagination as needed.
Specifically, the light that light source 1 is sent is changed into directional light 3 through the first collimation lens 2, and directional light is passed through in sample cell 5
Cuvette, grease to be measured is housed, light is changed into the light beam of different wave length, different wave length after the diffraction of grating 9 in cuvette
Light beam be imaged onto after the collimation of post mirror 10 on linear CCD sensor 11, spectroscopic data that linear CCD sensor 11 is measured is passed
Enter in computing device 13.
Further, after computing device 13 receives spectroscopic data, the grease to be measured is measured by mercury lamp mark
The curve of spectrum, mercury lamp mark process be specially：Low pressure mercury lamp is put into sample cell, after device is powered, low pressure mercury lamp is obtained
Mercury characteristic spectral line, linear CCD sensor is calibrated, the linear corresponding relation of CCD wavelength and pixel is calculated；Known mercury lamp
Wavelength at light source crest, finds the coordinate of the corresponding pixel of two groups of crests, and linear CCD sensor ripple is obtained by fitting
Relation between length/pixel, the curve of spectrum that linear CCD sensor is measured is converted into light intensity/wavelength by light intensity/pixel relationship and closed
System, so as to obtain the curve of spectrum of grease to be measured.
Further, spectrum analysis is carried out using logarithm method, calculates the chromatic value of grease to be measured；The light that light source is sent passes through
The transmission function of each combined filters of RYB is：T=RYB, by being taken the logarithm to this function both sides, can be obtained：
LogT=logR+logY+logB
Multiplying is changed into by add operation by the method for taking the logarithm, has both facilitated and has carried out data processing, computing can be improved again
Speed.By transmission spectrum, T points are wavelength selective transmission part and common transmissive portion, can be obtained：
T=T0T(λ)
LogT=logT0+logT(λ)
T0For common transmissive portion, T (λ) is wavelength selected section, because influential on reading is visible light wave range
Spectrum, so only investigating the transmission spectrum in visible wavelength range.Find the maximum as T that institute's light-metering is composed in wave-length coverage0,
Thus, T (λ)=T/T is calculated0。
In the present embodiment, change of transmitted light intensity during above-mentioned grease measurement apparatus measurement n.s with wavelength is passed through first
TIt is empty(λ), then measures sample spectra T by oil sample to be measured addition sample cellSample(λ).Two spectrum are divided by and obtain sample
Transmitted spectrum T.
Further, it is wavelength selective transmission part T (λ) and common transmissive portion T transmitted spectrum T to be divided0, find and surveyed
Sample transmission spectrum T maximum of T0, calculate wavelength selective transmission fractional transmission spectrum T (λ)=T/T0, R, Y are measured, B numerical value is
10 wavelength selective transmission spectrum, calculates logarithmic form spectrum logY10(λ)、logR10(λ) and logB10(λ), wherein, R, Y, B number
Value unit is Lovibond unit.
Further, the chromatic value of grease to be measured is calculated：
In formula, r, y, b, w are the chromatic value of each color of grease to be measured；λ max are visible wavelength maximum；λ min are can
See optical wavelength minimum value；T0For common transmissive portion in transmitted spectrum；Y10For Y10The maximum of (λ) curve of spectrum；R10For R10
The maximum of (λ) curve of spectrum；B10For B10The maximum of (λ) curve of spectrum.
Grease color detecting system provided in an embodiment of the present invention, builds light path according to the respective characteristic of optical element, makes
Spectroscopic data is gathered with linear CCD sensor, and spectroscopic data is passed through into mercury lamp mark by the incoming computing device of USB data line
Note measures the curve of spectrum of the grease to be measured, and spectrum analysis is carried out using logarithm method, calculates the chromatic value of grease to be measured.With showing
Some Lovibond tests are compared, realize grease color automatic measurement, it is to avoid human error in visual measurement process and
The influence of environmental factor, reduces labor intensity, improves measurement accuracy and measuring speed.
The embodiment of the present invention directly handles spectrum using logarithm method, reduces and enters Lovibond standard color chips deposit database
Row retrieval matching the consumed time, arithmetic speed is improved, the working time is saved.The grease color detection that the present invention is provided
System, compact hardware, cost is low, meets China's edible oil grade defining standard, and performance is stable, can continuously measure.
On the basis of above-described embodiment, the light processor also includes optics aperture, adjustable slit 8, second and collimated
The collimation lens 14 of lens 7 and the 3rd, the optics aperture includes the first optics aperture 4 and the second optics aperture 6；
As shown in figure 1, second collimation lens 7, the collimation lens 14 of adjustable slit 8 and the 3rd are successively set on the sample
Between product groove 5 and the post mirror 10, the adjustable slit 8 is located at the point of intersection of the light by the second collimation lens 7；Described
One optics aperture 4 is arranged between first collimation lens 2 and the sample cell 5, and the second optics aperture 6 is arranged on institute
State between the collimation lens 7 of sample cell 5 and second.
The light processor is positioned in camera bellows, the surface of the camera bellows provided with switch, power interface, USB interface with
And sample places entrance, the light source is iodine-tungsten lamp；The computing device is electrically connected by USB data line with the light processor
Connect, the computing device is computer or tablet personal computer.
Specifically, the light processor is placed in camera bellows, and the surface of the camera bellows connects provided with switch, power interface, USB
Mouth and sample place entrance, and detection can avoid the influence of ambient light in camera bellows.Light source 1 uses iodine-tungsten lamp light source, iodine-tungsten lamp
High, long lifespan, the characteristics of colour rendering is good with luminous efficiency.Using voltage-stabilized power supply to light source power supply, in the present embodiment, light source
Rated voltage is 12V, and rated power is 20W.The present embodiment uses the cuvette of 1 inch and 5.25 inches two kinds of specification.Will dress
The cuvette for having grease to be measured is placed in sample cell, and light path is built according to the respective characteristic of optical element.The light that light source 1 is sent leads to
Cross and be changed into directional light 3 after the first collimation lens 2, directional light 3 filtered by the first optics aperture 4 after veiling glare through specimen holder and
Sample cell 5, then convergence after the second collimation lens 7 is incided after the optical filtering of the second optics aperture 6, place Jiao Yu of adjustable slit 8
Point at, through adjustable slit light by the 3rd collimation lens 14 after, grating 9 is incided, through the different wave length after the diffraction of grating 9
Light beam, by being imaged onto after post mirror 10 on linear CCD sensor 11, marked by mercury lamp and measure the spectrum of the grease to be measured
Curve, line array CCD 11 is by the spectroscopic data of collection through in the incoming computing device 13 of USB data line 12.Computing device 13 is according to line
The spectroscopic data that array ccd sensor 11 is gathered, the curve of spectrum for measuring the grease to be measured is marked by mercury lamp, and use logarithm
Method carries out spectrum analysis, calculates the chromatic value of grease to be measured.
Wherein, the base of linear CCD sensor 11 is adjustable, by adjusting line array sensor CCD11 position, is located at not
The point of intersection of co-wavelength light.
The grease detecting system that the present invention is provided, is filtered using optics aperture and adjustable slit, improves measurement essence
Degree, makes grease testing result more accurate.
On the basis of above-described embodiment, the computing device 13 is additionally operable to the chromatic value according to the grease to be measured, sentenced
The grade of oil-break product.
Specifically, according to national edible oil grade defining standard, the oil sample of each grade level edible oil is collected, using upper
The chromatic value of grease detection means survey calculation different brackets grease is stated, statistics delimited out corresponding to different oil product grades
Chromatic value range, program is changed by fitting algorithm so that according to measurement data, can finally judge the grade of oil product.This
The grease color detecting system that inventive embodiments are provided, according to the chromatic value of the grease to be measured, judges the grade of oil product, can be with
Further visual inspection obtains the grade of edible oil, simplifies detecting step, reduces labor intensity.
Fig. 2 is according to grease color detection method schematic flow sheet provided in an embodiment of the present invention.As shown in Fig. 2 the party
Method includes：Step S1, selects stable light source, and the cuvette that will be equipped with grease to be measured is placed in sample cell；Step S2, linear array
The spectroscopic data of ccd sensor collection measures the grease to be measured through the incoming computing device of USB data line by mercury lamp mark
The curve of spectrum；Step S3, computing device carries out spectrum analysis, meter according to the curve of spectrum of the grease to be measured using logarithm method
Calculate the chromatic value of grease to be measured.
Wherein, in step S1, light source uses iodine-tungsten lamp light source, and iodine-tungsten lamp has luminous efficiency high, and long lifespan, colour rendering is good
The characteristics of.Using voltage-stabilized power supply to light source power supply, in the present embodiment, light source rated voltage is 12V, and rated power is 20W.Will
Cuvette equipped with grease to be measured is placed in sample cell.
Wherein, in step S2, light path, the spectrum of linear CCD sensor collection are built according to the respective characteristic of optical element
Data mark the curve of spectrum for measuring the grease to be measured by mercury lamp through the incoming computing device of USB data line.
Specifically, the light that light source is sent is small by the first optics by being changed into directional light, directional light after the first collimation lens
Hole filters and specimen holder and sample cell is passed through after veiling glare, then is incided after the optical filtering of the second optics aperture after the second collimation lens
Convergence, places adjustable slit in focal point, through adjustable slit light by the 3rd collimation lens after, grating is incided, through light
The light beam of different wave length after grid diffraction, by being imaged onto after post mirror on linear CCD sensor, is measured described by mercury lamp mark
The curve of spectrum of grease to be measured, line array CCD is by the spectroscopic data of collection through in the incoming computing device of USB data line.
Further, low pressure mercury lamp is put into sample cell, after device is powered, obtains the mercury characteristic spectral line of low pressure mercury lamp,
Linear CCD sensor is calibrated, the linear corresponding relation of CCD wavelength and pixel is calculated；At known mercury lamp light source crest
Wavelength, finds the coordinate of the corresponding pixel of two groups of crests, and the pass between linear CCD sensor wavelength/pixel is obtained by fitting
System, the curve of spectrum that linear CCD sensor is measured is converted into light intensity/wavelength relationship by light intensity/pixel relationship, so as to be treated
Survey the curve of spectrum of grease.
Wherein, in step S3, computing device carries out spectrum analysis according to the curve of spectrum of grease to be measured using logarithm method,
Calculate the chromatic value of grease to be measured.
Specifically, use logarithm method carry out spectrum analysis principle for：
Transmission function of the light that light source is sent Jing Guo each combined filters of RYB be：T=RYB, by being taken to this function both sides
Logarithm, can be obtained
LogT=logR+logY+logB
Multiplying is changed into by add operation by the method for taking the logarithm, has both facilitated and has carried out data processing, computing can be improved again
Speed.By transmission spectrum, T points are wavelength selective transmission part and common transmissive portion, can be obtained：
T=T0T(λ)
LogT=logT0+logT(λ)
T0For common transmissive portion, T (λ) is wavelength selected section, because influential on reading is visible light wave range
Spectrum, so only investigating the transmission spectrum in visible wavelength range.Find the maximum as T that institute's light-metering is composed in wave-length coverage0,
Thus, T (λ)=T/T is calculated0。
In the present embodiment, change of transmitted light intensity during above-mentioned grease measurement apparatus measurement n.s with wavelength is passed through first
TIt is empty(λ), then measures sample spectra T by oil sample to be measured addition sample cellSample(λ).Two spectrum are divided by and obtain sample
Transmitted spectrum T.
Further, it is wavelength selective transmission part T (λ) and common transmissive portion T transmitted spectrum T to be divided0, find and surveyed
Sample transmission spectrum T maximum of T0, calculate wavelength selective transmission fractional transmission spectrum T (λ)=T/T0, R, Y are measured, B numerical value is
10 wavelength selective transmission spectrum, calculates logarithmic form spectrum logY10(λ)、logR10(λ) and logB10(λ), wherein, R, Y, B number
Value unit is Lovibond unit.
Further, the chromatic value of grease to be measured is calculated：
In formula, r, y, b, w are the chromatic value of each color of grease to be measured；λ max are visible wavelength maximum；λ min are can
See optical wavelength minimum value；T0For common transmissive portion in transmitted spectrum；Y10For Y10The maximum of (λ) curve of spectrum；R10For R10
The maximum of (λ) curve of spectrum；B10For B10The maximum of (λ) curve of spectrum.
Grease color detection method provided in an embodiment of the present invention, builds light path according to the respective characteristic of optical element, makes
Spectroscopic data is gathered with linear CCD sensor, and spectroscopic data is passed through into mercury lamp mark by the incoming computing device of USB data line
Note measures the curve of spectrum of the grease to be measured, and spectrum analysis is carried out using logarithm method, calculates the chromatic value of grease to be measured.With showing
Some Lovibond tests are compared, realize grease color automatic measurement, it is to avoid human error in visual measurement process and
The influence of environmental factor, reduces labor intensity, improves measurement accuracy and measuring speed.
The embodiment of the present invention directly handles spectrum using logarithm method, reduces and enters Lovibond standard color chips deposit database
Row retrieval matching the consumed time, arithmetic speed is improved, the working time is saved.The grease color detection that the present invention is provided
System, compact hardware, cost is low, meets China's edible oil grade defining standard, and performance is stable, can continuously measure.
On the basis of above-described embodiment, grease color detection method provided in an embodiment of the present invention also includes, according to institute
The chromatic value of grease to be measured is stated, the grade of the grease is judged.
Specifically, according to national edible oil grade defining standard, the oil sample of each grade level edible oil is collected, using upper
The chromatic value of grease detection means survey calculation different brackets grease is stated, statistics delimited out corresponding to different oil product grades
Chromatic value range, program is changed by fitting algorithm so that according to measurement data, can finally judge the grade of oil product.This
The grease color detecting system that inventive embodiments are provided, according to the chromatic value of the grease to be measured, judges the grade of oil product, can be with
Further visual inspection obtains the grade of edible oil, simplifies detecting step, reduces labor intensity.
On the basis of the various embodiments described above, the spectroscopic data of the line array CCD multi collect sample；Accordingly, it is described
Computing device according to multi collect to spectroscopic data average, and using logarithm method carry out spectrum analysis, calculate described in treat
Survey the chromatic value of grease.The embodiment of the present invention takes the measuring method of average using repeatedly measurement, improves the reliable of measurement result
Property.
The grease color system and method that the present invention is provided, builds light path according to the respective characteristic of optical element, uses line
Array ccd sensor gathers spectroscopic data, and spectroscopic data is marked by mercury lamp and surveyed by the incoming computing device of USB data line
The curve of spectrum of the grease to be measured is obtained, the curve of spectrum for measuring grease to be measured is marked by mercury lamp, light is carried out using logarithm method
Analysis of spectrum, calculates the chromatic value of grease to be measured.Compared with existing Lovibond test, grease color automatic measurement is realized,
The influence of the human error and environmental factor in visual measurement process is avoided, labor intensity is reduced, improves measurement accuracy
And measuring speed；The measuring method of average is taken using multiple measurement, the reliability of measurement result is improved.
The present invention directly handles spectrum using logarithm method, reduces and is retrieved Lovibond standard color chips deposit database
Matching the consumed time, arithmetic speed is improved, the working time is saved.The grease color detecting system that the present invention is provided,
Compact hardware, cost is low, meets China's edible oil grade defining standard, and performance is stable, can continuously measure.
Finally, the present processes are only preferably embodiment, are not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc. should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of grease color detecting system, it is characterised in that including light processor and computing device, the light processor
Including light source, the first collimation lens, sample cell, cuvette, post mirror, grating and linear CCD sensor；The light processor with
The computing device is electrically connected；
Grease to be measured is housed, the cuvette is positioned in the sample cell in the cuvette；The light that light source is sent is passed through
First collimation lens and sample cell, linear CCD sensor composition optical path is reached after optical grating diffraction through post mirror；
The computing device, for the spectroscopic data gathered according to linear CCD sensor, is measured described to be measured by mercury lamp mark
The curve of spectrum of grease, and spectrum analysis is carried out using logarithm method, calculate the chromatic value of grease to be measured.
2. grease color detecting system according to claim 1, it is characterised in that the light processor also includes optics
Aperture, adjustable slit, the second collimation lens and the 3rd collimation lens, the optics aperture include the first optics aperture and the second light
Learn aperture；
Second collimation lens, adjustable slit and the 3rd collimation lens be successively set on the sample cell and the post mirror it
Between, the adjustable slit is located at the point of intersection of the light by the second collimation lens；The first optics aperture is arranged on described
Between first collimation lens and the sample cell, the second optics aperture is arranged on the sample cell and second collimation is saturating
Between mirror.
3. grease color detecting system according to claim 1, it is characterised in that the computing device, is additionally operable to basis
The chromatic value of the grease to be measured, judges the grade of oil product.
4. grease color detecting system according to claim 1, it is characterised in that the light processor is positioned over camera bellows
In, entrance is placed in the surface of the camera bellows provided with switch, power interface, USB interface and sample, and the light source is iodine-tungsten lamp.
5. grease color detecting system according to claim 1, it is characterised in that the computing device passes through usb data
Line is electrically connected with the light processor, and the computing device is computer or tablet personal computer.
6. a kind of grease color detection method, it is characterised in that including：
Step S1, selects stable light source, and the cuvette that will be equipped with grease to be measured is placed in sample cell；
Step S2, the spectroscopic data of linear CCD sensor collection is marked by mercury lamp and surveyed through the incoming computing device of USB data line
Obtain the curve of spectrum of the grease to be measured；
Step S3, computing device carries out spectrum analysis according to the curve of spectrum of the grease to be measured using logarithm method, calculates to be measured
The chromatic value of grease.
7. grease color detection method according to claim 6, it is characterised in that methods described also includes, according to described
The chromatic value of grease to be measured, judges the grade of the grease.
8. grease color detection method according to claim 6, it is characterised in that it is described measured by mercury lamp mark it is described
The curve of spectrum of grease to be measured includes：
Low pressure mercury lamp is put into sample cell, after light processor is powered, the mercury characteristic spectral line of low pressure mercury lamp is obtained, according to described
The mercury characteristic spectral line of low pressure mercury lamp, is calibrated to linear CCD sensor, calculates the linear corresponding relation of CCD wavelength and pixel；
Wavelength at known mercury lamp light source crest, finds the coordinate of the corresponding pixel of two groups of crests, and obtaining line array CCD by fitting passes
Relation between sensor wavelength/pixel, the curve of spectrum that linear CCD sensor is measured by light intensity/pixel relationship be converted into light intensity/
Wavelength relationship, so as to obtain the curve of spectrum of grease to be measured.
9. grease color detection method according to claim 6, it is characterised in that in the step S3, the use pair
Number method carries out spectrum analysis, calculates the chromatic value of grease to be measured and includes：
Step S31, measurement n.s when transmitted light intensity with wavelength change TIt is empty(λ), is then put into sample by oil sample to be measured
Groove measures sample spectra TSample(λ), two spectrum are divided by and obtain the transmitted spectrum T=T of sampleSample(λ)/TIt is empty(λ)；
Step S32, by transmitted spectrum, T points are wavelength selective transmission part T (λ) and common transmissive portion T0, find institute's test sample product saturating
Penetrate spectrum T maximum of T0, calculate wavelength selective transmission fractional transmission spectrum T (λ)=T/T0, R, Y are measured, B numerical value is 10 ripple
Long selective transmission spectrum, calculates logarithmic form spectrum log Y10(λ)、logR10(λ) and logB10(λ), wherein, R, Y, B numerical value unit
It is Lovibond unit；
Step S33, calculates the chromatic value of grease to be measured：
<mrow>
<mi>r</mi>
<mo>=</mo>
<mfrac>
<mrow>
<msubsup>
<mo>&Integral;</mo>
<mrow>
<mi>&lambda;</mi>
<mi>min</mi>
</mrow>
<mrow>
<mi>&lambda;</mi>
<mi>max</mi>
</mrow>
</msubsup>
<mi>log</mi>
<mi>T</mi>
<mrow>
<mo>(</mo>
<mi>&lambda;</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>logR</mi>
<mn>10</mn>
</msub>
<mrow>
<mo>(</mo>
<mi>&lambda;</mi>
<mo>)</mo>
</mrow>
<mi>d</mi>
<mi>&lambda;</mi>
</mrow>
<mrow>
<msubsup>
<mo>&Integral;</mo>
<mrow>
<mi>&lambda;</mi>
<mi>min</mi>
</mrow>
<mrow>
<mi>&lambda;</mi>
<mi>max</mi>
</mrow>
</msubsup>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>logR</mi>
<mn>10</mn>
</msub>
<mo>(</mo>
<mi>&lambda;</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
<mi>d</mi>
<mi>&lambda;</mi>
</mrow>
</mfrac>
</mrow>
<mrow>
<mi>y</mi>
<mo>=</mo>
<mfrac>
<mrow>
<msubsup>
<mo>&Integral;</mo>
<mrow>
<mi>&lambda;</mi>
<mi>min</mi>
</mrow>
<mrow>
<mi>&lambda;</mi>
<mi>max</mi>
</mrow>
</msubsup>
<mi>log</mi>
<mi>T</mi>
<mrow>
<mo>(</mo>
<mi>&lambda;</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>logY</mi>
<mn>10</mn>
</msub>
<mrow>
<mo>(</mo>
<mi>&lambda;</mi>
<mo>)</mo>
</mrow>
<mi>d</mi>
<mi>&lambda;</mi>
</mrow>
<mrow>
<msubsup>
<mo>&Integral;</mo>
<mrow>
<mi>&lambda;</mi>
<mi>min</mi>
</mrow>
<mrow>
<mi>&lambda;</mi>
<mi>max</mi>
</mrow>
</msubsup>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>logY</mi>
<mn>10</mn>
</msub>
<mo>(</mo>
<mi>&lambda;</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
<mi>d</mi>
<mi>&lambda;</mi>
</mrow>
</mfrac>
</mrow>
<mrow>
<mi>b</mi>
<mo>=</mo>
<mfrac>
<mrow>
<msubsup>
<mo>&Integral;</mo>
<mrow>
<mi>&lambda;</mi>
<mi>min</mi>
</mrow>
<mrow>
<mi>&lambda;</mi>
<mi>max</mi>
</mrow>
</msubsup>
<mi>log</mi>
<mi>T</mi>
<mrow>
<mo>(</mo>
<mi>&lambda;</mi>
<mo>)</mo>
</mrow>
<msub>
<mi>logB</mi>
<mn>10</mn>
</msub>
<mrow>
<mo>(</mo>
<mi>&lambda;</mi>
<mo>)</mo>
</mrow>
<mi>d</mi>
<mi>&lambda;</mi>
</mrow>
<mrow>
<msubsup>
<mo>&Integral;</mo>
<mrow>
<mi>&lambda;</mi>
<mi>min</mi>
</mrow>
<mrow>
<mi>&lambda;</mi>
<mi>max</mi>
</mrow>
</msubsup>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>logB</mi>
<mn>10</mn>
</msub>
<mo>(</mo>
<mi>&lambda;</mi>
<mo>)</mo>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
<mi>d</mi>
<mi>&lambda;</mi>
</mrow>
</mfrac>
</mrow>
<mrow>
<mi>w</mi>
<mo>=</mo>
<mfrac>
<msub>
<mi>T</mi>
<mn>0</mn>
</msub>
<mrow>
<msub>
<mi>Y</mi>
<mn>10</mn>
</msub>
<msub>
<mi>R</mi>
<mn>10</mn>
</msub>
<msub>
<mi>B</mi>
<mn>10</mn>
</msub>
</mrow>
</mfrac>
</mrow>
In formula, r, y, b, w are the chromatic value of each color of grease to be measured；λ max are visible wavelength maximum；λ min are visible ray
Wavelength minimum (X-Guang Pu)；T0For common transmissive portion in transmitted spectrum；Y10For Y10The maximum of (λ) curve of spectrum；R10For R10(λ) light
The maximum of spectral curve；B10For B10The maximum of (λ) curve of spectrum.
10. grease color detection method according to claim 7, it is characterised in that the linear CCD sensor is repeatedly adopted
Collect the spectroscopic data of sample；Accordingly, the computing device according to multi collect to spectroscopic data average, pass through mercury lamp
Mark obtains the curve of spectrum of the grease to be measured, and carries out spectrum analysis using logarithm method, calculates the color of the grease to be measured
Angle value.
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| CN114689528A (en) * | 2022-06-01 | 2022-07-01 | 联桥网云信息科技（长沙）有限公司 | Consistency measurement and correction device and method for hyperspectral oil detection equipment |
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| CN113109287A (en) * | 2021-03-17 | 2021-07-13 | 杭州兰亮网络科技有限公司 | Detection method for obtaining image processing oil quality by additionally arranging sensor |
| CN114689528A (en) * | 2022-06-01 | 2022-07-01 | 联桥网云信息科技（长沙）有限公司 | Consistency measurement and correction device and method for hyperspectral oil detection equipment |
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