CN107064023B - A kind of grease color detection system and method - Google Patents
A kind of grease color detection system and method Download PDFInfo
- Publication number
- CN107064023B CN107064023B CN201710322691.0A CN201710322691A CN107064023B CN 107064023 B CN107064023 B CN 107064023B CN 201710322691 A CN201710322691 A CN 201710322691A CN 107064023 B CN107064023 B CN 107064023B
- Authority
- CN
- China
- Prior art keywords
- grease
- spectrum
- measured
- sample
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- 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
- G01N21/274—Calibration, base line adjustment, drift correction
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention provides a kind of grease color detection system and method, and the system comprises light processor and computing device, the light processor includes light source, the first collimation lens, sample cell, cuvette, cylindrical mirror, grating and linear CCD sensor.Grease color detection system and method provided by the invention, optical path is built according to the respective characteristic of optical element, spectroscopic data is acquired using linear CCD sensor, and spectroscopic data is passed to computing device by USB data line, the curve of spectrum of the grease to be measured is measured by mercury lamp label, spectrum analysis is carried out using logarithm method, 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, improves measurement accuracy and measuring speed；The measurement method that mean value is taken using multiple measurement, improves the reliability of measurement result.
Description
Technical field
The present invention relates to photoelectric detection technology fields, more particularly, to a kind of grease color detection system and method.
Background technique
The quality of oil quality is related to that the health of people and China's grease sales situation, quality have become influence
The key factor of oil plant and oils industry competitiveness.Color is defined the level as grease, price and consumer choose the important outer of oil plant
Foundation is seen, is one of the important indicator of oil quality detection.Grease processing technique and item can be improved to the measurement of grease color
Part provides safeguard safely for food industry and enhances China's foreign trade.
Currently, Lovibond color device is the international uniform standard for measuring color with oil color, lovibond test is counted as Luo Wei
The corresponding instrument of friend's color device is the grease detecting instrument to pass through in the world at present.Lovibond test uses visual side
Method matches the substantially square of oil sample color and the detection of China's oil quality with the synthesis color of Lovibond standard colorimetric piece
Method.
But artificial visual method is used, excessively high to observer's vision requirement, there are inevitable manual measurement deviation, measurements
As a result it is easy to be influenced by gauger and measurement environment；In addition, visual method operating process is cumbersome, the degree of automation is low, labour
Intensity is big, not can be carried out continuous measurement；Simultaneously as color chips combination is complicated, prolonged measurement will lead to Lovibond color
Piece misalignment.
Tintometer company, Britain had developed AF960 auto colorimeter in 1984, but studied and find this colorimeter
Good correlation cannot be formed with visual colorimeter, cannot be widely used.The online automatic spectrum of KC-560 that Japan develops
Color with oil color analyzer, because it is expensive, measurement environmental requirement is high, is only used for the measurement of factory or laboratory grease.
1996, the U.S., the online colorimeter PFX990 of enhancing that equal 12 countries, Canada develop jointly, red value and lovibond test
In respect of preferable correlation.Currently, the external High Precision Automatic colorimeter PFX995 for generalling use the development of Tintometer company
Series carries out the measurement of grease color, this electronics colorimeter is expensive, is unsatisfactory for the current edible oil grade defining standard in China.
The automatic colorimetric method for grease color measurement domestic at present mainly has photoelectric integral method and spectrophotometry.Light
The principle of electrical integration is that the tristimulus values characteristic of simulation human eye directly measures the tristimulus of color using photoelectric integration method
Value, 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.Since it is not high to the absolute measurement precision of color, it is mainly used for measuring the colour-difference of two articles.It is divided light
The tristimulus values of degree method not instead of not directly measurement color itself, calculates the three of color by the spectral power distribution of measurement light source
Values.Mainly it is made of monochromator and detector two parts.But due to its development cost height, this colorimeter does not realize production
Product.
Summary of the invention
The present invention is to solve the drawbacks described above of the prior art, provides a kind of grease color detection system and method.
On the one hand, the present invention provides a kind of grease color detection system, including light processor and computing device, the light
Processing unit includes light source, the first collimation lens, sample cell, cuvette, cylindrical 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 placed in the sample cell in the cuvette；The light that light source issues
Through the first collimation lens and sample cell, linear CCD sensor is reached through cylindrical mirror after optical grating diffraction and constitutes optical path；
The computing device, the spectroscopic data for being acquired according to linear CCD sensor are measured described by mercury lamp label
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 further includes that optics aperture, adjustable slit, the second collimation lens and third collimation are saturating
Mirror, the optics aperture include the first optics aperture and the second optics aperture；
Second collimation lens, adjustable slit and third collimation lens are successively set on the sample cell and the cylindrical 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 in institute
It states between the first collimation lens and the sample cell, the second optics aperture setting is in the sample cell and second collimation
Between lens.
Wherein, the computing device is also used to judge the grade of oil product according to the chromatic value of the grease to be measured.
Wherein, the light processor is placed in camera bellows, and the surface of the camera bellows is equipped with switch, power interface, USB and connects
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 computer.
On the other hand, the present invention also provides a kind of grease color detection methods, comprising:
Step S1 selects stable light source, and the cuvette equipped with grease to be measured is placed in sample cell；
The spectroscopic data of step S2, linear CCD sensor acquisition are passed to computing device through USB data line, pass through mercury lamp mark
Note measures the curve of spectrum of the grease to be measured；
Step S3, computing device carry out spectrum analysis using logarithm method, calculate according to the curve of spectrum of the grease to be measured
The chromatic value of grease to be measured.
Wherein, the method also includes judging the grade of the grease according to the chromatic value of the grease to be measured.
Wherein, the curve of spectrum for measuring the grease to be measured by mercury lamp label includes:
Low pressure mercury lamp is put into sample cell after device is powered and 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, calibrates linear CCD sensor, calculates the linear corresponding relation of CCD wavelength and pixel；?
Know the wavelength at mercury lamp light source wave crest, find the coordinate of the corresponding pixel of two groups of wave crests, line array CCD sensing is obtained by fitting
Relationship between device wavelength/pixel converts light intensity/wave by light intensity/pixel relationship for the curve of spectrum that linear CCD sensor measures
Long relationship, to obtain the curve of spectrum of grease to be measured.
Wherein, described that spectrum analysis is carried out using logarithm method in the step S3, calculate the chromatic value packet of grease to be measured
It includes:
Step S31, measure no sample when transmitted light intensity with wavelength variation TIt is emptyThen oil sample to be measured is put by (λ)
Sample cell measures sample spectra TSampleTwo spectrum are divided by obtain the transmitted spectrum T of sample by (λ)；
Step S32 divides transmitted spectrum T for wavelength selective transmission part T (λ) and common transmissive portion T0, find and surveyed
The maximum of T of sample transmission spectrum 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 is visible wavelength maximum value；λ min is can
Light-exposed wavelength minimum (X-Guang Pu)；T0For transmissive portion common in transmitted spectrum；Y10For Y10The maximum value of (λ) curve of spectrum；R10For R10
The maximum value of (λ) curve of spectrum；B10For B10The maximum value of (λ) curve of spectrum.
Wherein, the spectroscopic data of the linear CCD sensor multi collect sample；Correspondingly, the computing device according to
Multi collect to spectroscopic data be averaged, the curve of spectrum of the grease to be measured is measured by mercury lamp label, and using pair
Number method carries out spectrum analysis, calculates the chromatic value of the grease to be measured.
Grease color detection system and method provided by the invention are built optical path according to the respective characteristic of optical element, are made
Spectroscopic data is acquired with linear CCD sensor, and spectroscopic data is passed to computing device by USB data line, passes through mercury lamp mark
Note measures the curve of spectrum of the grease to be measured, carries out spectrum analysis using logarithm method, calculates the chromatic value of grease to be measured.With it is existing
Some Lovibond tests are compared, and grease color automatic measurement is realized, 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 mean value is taken using multiple measurement
Amount method improves the reliability of measurement result.
The present invention directly handles spectrum using logarithm method, reduces and retrieves Lovibond standard color chips deposit database
Time consumed by matching, arithmetic speed is improved, the working time is saved.Grease color detection system provided by the invention,
Compact hardware, it is at low cost, meet China's edible oil grade defining standard, performance is stablized, can continuously be measured.
Detailed description of the invention
Fig. 1 is according to grease color detection system hardware structure diagram provided in an embodiment of the present invention；
Fig. 2 is according to grease color detection method flow diagram provided in an embodiment of the present invention；
In figure: 1: light source；2: the first collimation lenses；3: directional light；4: the first optics apertures；5: sample cell；6: the second light
Learn aperture；7: the second collimation lenses；8: adjustable slit；9: grating；10: cylindrical mirror；11: linear CCD sensor；12:USB data
Line；13: computing device；14: third collimation lens.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Fig. 1 is according to grease color detection system hardware structure diagram provided in an embodiment of the present invention.As shown in Figure 1, grease
Color detection system includes light processor and computing device, and the light processor includes light source 1, the first collimation lens 2, sample
Product slot 5, cuvette, cylindrical mirror 10, grating 9 and linear CCD sensor 11；The light processor and the computing device carry out electricity
Connection；
Grease to be measured is housed, the cuvette is placed in the sample cell 5 in the cuvette；The light that light source 1 issues
Line penetrates the first collimation lens 2 and sample cell 5, reaches linear CCD sensor 11 through cylindrical mirror 10 after 9 diffraction of grating and constitutes survey
Measure optical path；
The computing device 13, the spectroscopic data for being acquired according to linear CCD sensor 11 are measured by mercury lamp label
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 high sensitivity
Semiconductor material is made, and light can be transformed into charge, is converted into digital signal, digital signal warp by analog-digital converter chip
It is saved, thus easily data can be transmitted by the flash memory or built-in hard disk card of camera internal after overcompression
To computer, and by means of the processing means of computer, as needed and imagination is to modify image.
Specifically, the light that light source 1 issues becomes directional light 3 through the first collimation lens 2, and directional light passes through in sample cell 5
Cuvette, grease to be measured is housed, light becomes the light beam of different wave length, different wave length after 9 diffraction of grating in cuvette
Light beam be imaged on linear CCD sensor 11 after the collimation of cylindrical mirror 10, spectroscopic data that linear CCD sensor 11 measures passes
Enter in computing device 13.
Further, after computing device 13 receives spectroscopic data, the grease to be measured is measured by mercury lamp label
The curve of spectrum, the process of mercury lamp label specifically: low pressure mercury lamp is put into sample cell, after device is powered, obtains low pressure mercury lamp
Mercury characteristic spectral line, linear CCD sensor is calibrated, calculate CCD wavelength and pixel linear corresponding relation；Known mercury lamp
Wavelength at light source wave crest finds the coordinate of the corresponding pixel of two groups of wave crests, obtains linear CCD sensor wave by fitting
Relationship between length/pixel converts light intensity/wavelength by light intensity/pixel relationship for the curve of spectrum that linear CCD sensor measures and closes
System, 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 issues passes through
The transmission function of each combined filters of RYB are as follows: T=RYB can be obtained by taking logarithm to this function both sides:
LogT=logR+logY+logB
By taking logarithm method that multiplying is converted to add operation, carry out data processing was not only facilitated, but also operation can be improved
Speed.Transmission spectrum T is divided for wavelength selective transmission part and common transmissive portion, can be obtained:
T=T0T(λ)
LogT=logT0+logT(λ)
T0For common transmissive portion, it is visible light wave range because influential on reading that T (λ), which is wavelength selection part,
Spectrum, so only investigating the transmission spectrum in visible wavelength range.The maximum value for finding surveyed spectrum wave-length coverage Nei is T0,
T (λ)=T/T is calculated as a result,0。
In the present embodiment, first by transmitted light intensity when above-mentioned grease measuring device measurement no sample with the variation of wavelength
TIt is emptyThen oil sample to be measured addition sample cell is measured sample spectra T by (λ)Sample(λ).Two spectrum are divided by obtain sample
Transmitted spectrum T.
Further, transmitted spectrum T is divided for wavelength selective transmission part T (λ) and common transmissive portion T0, find and surveyed
The maximum of T of sample transmission spectrum 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 is visible wavelength maximum value；λ min is can
Light-exposed wavelength minimum (X-Guang Pu)；T0For transmissive portion common in transmitted spectrum；Y10For Y10The maximum value of (λ) curve of spectrum；R10For R10
The maximum value of (λ) curve of spectrum；B10For B10The maximum value of (λ) curve of spectrum.
Grease color detection system provided in an embodiment of the present invention is built optical path according to the respective characteristic of optical element, is made
Spectroscopic data is acquired with linear CCD sensor, and spectroscopic data is passed to computing device by USB data line, passes through mercury lamp mark
Note measures the curve of spectrum of the grease to be measured, carries out spectrum analysis using logarithm method, calculates the chromatic value of grease to be measured.With it is existing
Some Lovibond tests are compared, and grease color automatic measurement is realized, 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, reduce by Lovibond standard color chips be stored in database into
Row retrieval matches the consumed time, improves arithmetic speed, saves the working time.Grease color detection provided by the invention
System, compact hardware is at low cost, meets China's edible oil grade defining standard, and performance is stablized, can continuously be measured.
On the basis of the above embodiments, the light processor further includes optics aperture, the collimation of adjustable slit 8, second
Lens 7 and third collimation lens 14, the optics aperture include the first optics aperture 4 and the second optics aperture 6；
As shown in Figure 1, second collimation lens 7, adjustable slit 8 and third collimation lens 14 are successively set on the sample
Between product slot 5 and the cylindrical 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 in institute
It states between sample cell 5 and the second collimation lens 7.
The light processor is placed in camera bellows, the surface of the camera bellows be equipped 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 and the light processor
It connects, the computing device is computer or tablet computer.
Specifically, the light processor is placed in camera bellows, and the surface of the camera bellows is equipped with switch, power interface, USB and connects
Mouth and sample place entrance, and the influence that can avoid environment light is detected in camera bellows.Light source 1 uses iodine-tungsten lamp light source, iodine-tungsten lamp
With luminous efficiency height, the service life is long, the good feature of colour rendering.Using regulated power supply to light source power supply, in the present embodiment, light source
Voltage rating is 12V, rated power 20W.The present embodiment uses the cuvette of 1 inch and 5.25 inches two kinds of specification.It will dress
There is the cuvette of grease to be measured to be placed in sample cell, optical path is built according to the respective characteristic of optical element.The light that light source 1 issues is logical
Crossing after the first collimation lens 2 becomes directional light 3, directional light 3 filtered by the first optics aperture 4 pass through after stray light specimen holder and
Sample cell 5 converges after being incident on the second collimation lens 7 after filtering using the second optics aperture 6, places adjustable slit 8 in coke
Point place, through adjustable slit light pass through third collimation lens 14 after, be incident on grating 9, the different wave length after 9 diffraction of grating
Light beam the spectrum of the grease to be measured is measured by mercury lamp label by being imaged on linear CCD sensor 11 after cylindrical mirror 10
The spectroscopic data of acquisition is passed in computing device 13 by curve, line array CCD 11 through USB data line 12.Computing device 13 is according to line
The spectroscopic data that array ccd sensor 11 acquires, the curve of spectrum of the grease to be measured is measured by mercury lamp label, and uses logarithm
Method carries out spectrum analysis, calculates the chromatic value of grease to be measured.
Wherein, 11 pedestal of linear CCD sensor is adjustable, by adjusting the position of line array sensor CCD11, is located at not
The point of intersection of co-wavelength light.
Grease detection system provided by the invention, is filtered using optics aperture and adjustable slit, improves measurement essence
Degree, keeps grease testing result more acurrate.
On the basis of the above embodiments, the computing device 13 is also used to be sentenced according to the chromatic value of the grease to be measured
The grade of oil-break product.
Specifically, according to national edible oil grade defining standard, the oil sample of each equal level edible oils is collected, in use
The chromatic value of grease detection device survey calculation different brackets grease is stated, statistical data delimited out corresponding to different oil product grades
Chromatic value range, by fitting algorithm modify program so that finally can judge the grade of oil product according to measurement data.This
The grease color detection system that inventive embodiments provide judges the grade of oil product according to the chromatic value of the grease to be measured, 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 flow diagram 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 equipped with grease to be measured is placed in sample cell；Step S2, linear array
The spectroscopic data of ccd sensor acquisition is passed to computing device through USB data line, measures the grease to be measured by mercury lamp label
The curve of spectrum；Step S3, computing device carry out spectrum analysis, meter using logarithm method according to the curve of spectrum of the grease to be measured
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 the service life is long, and colour rendering is good
The characteristics of.Using regulated power supply to light source power supply, in the present embodiment, light source voltage rating is 12V, rated power 20W.It will
Cuvette equipped with grease to be measured is placed in sample cell.
Wherein, in step S2, optical path, the spectrum of linear CCD sensor acquisition are built according to the respective characteristic of optical element
Data are passed to computing device through USB data line, and the curve of spectrum of the grease to be measured is measured by mercury lamp label.
Specifically, for the light that light source issues by becoming directional light after the first collimation lens, directional light is small by the first optics
Hole passes through specimen holder and sample cell after filtering stray light, after being incident on the second collimation lens after filtering using the second optics aperture
Convergence, places adjustable slit in focal point, through adjustable slit light by grating being incident on, through light after third collimation lens
The light beam of different wave length after grid diffraction is measured described by being imaged on linear CCD sensor after cylindrical mirror by mercury lamp label
The spectroscopic data of acquisition is passed in computing device by the curve of spectrum of grease to be measured, line array CCD through USB data line.
Further, low pressure mercury lamp is put into sample cell after device is powered and 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 wave crest
Wavelength finds the coordinate of the corresponding pixel of two groups of wave crests, obtains the pass between linear CCD sensor wavelength/pixel by fitting
System, light intensity/wavelength relationship is converted by light intensity/pixel relationship by the curve of spectrum that linear CCD sensor measures, thus obtain to
Survey the curve of spectrum of grease.
Wherein, in step S3, computing device carries out spectrum analysis using logarithm method according to the curve of spectrum of grease to be measured,
Calculate the chromatic value of grease to be measured.
Specifically, the principle of spectrum analysis is carried out using logarithm method are as follows:
Transmission function of the light that light source issues Jing Guo each combined filters of RYB are as follows: T=RYB, by being taken to this function both sides
Logarithm can obtain
LogT=logR+logY+logB
By taking logarithm method that multiplying is converted to add operation, carry out data processing was not only facilitated, but also operation can be improved
Speed.Transmission spectrum T is divided for wavelength selective transmission part and common transmissive portion, can be obtained:
T=T0T(λ)
LogT=logT0+logT(λ)
T0For common transmissive portion, it is visible light wave range because influential on reading that T (λ), which is wavelength selection part,
Spectrum, so only investigating the transmission spectrum in visible wavelength range.The maximum value for finding surveyed spectrum wave-length coverage Nei is T0,
T (λ)=T/T is calculated as a result,0。
In the present embodiment, first by transmitted light intensity when above-mentioned grease measuring device measurement no sample with the variation of wavelength
TIt is emptyThen oil sample to be measured addition sample cell is measured sample spectra T by (λ)Sample(λ).Two spectrum are divided by obtain sample
Transmitted spectrum T.
Further, transmitted spectrum T is divided for wavelength selective transmission part T (λ) and common transmissive portion T0, find and surveyed
The maximum of T of sample transmission spectrum 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 is visible wavelength maximum value；λ min is can
Light-exposed wavelength minimum (X-Guang Pu)；T0For transmissive portion common in transmitted spectrum；Y10For Y10The maximum value of (λ) curve of spectrum；R10For R10
The maximum value of (λ) curve of spectrum；B10For B10The maximum value of (λ) curve of spectrum.
Grease color detection method provided in an embodiment of the present invention is built optical path according to the respective characteristic of optical element, is made
Spectroscopic data is acquired with linear CCD sensor, and spectroscopic data is passed to computing device by USB data line, passes through mercury lamp mark
Note measures the curve of spectrum of the grease to be measured, carries out spectrum analysis using logarithm method, calculates the chromatic value of grease to be measured.With it is existing
Some Lovibond tests are compared, and grease color automatic measurement is realized, 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, reduce by Lovibond standard color chips be stored in database into
Row retrieval matches the consumed time, improves arithmetic speed, saves the working time.Grease color detection provided by the invention
System, compact hardware is at low cost, meets China's edible oil grade defining standard, and performance is stablized, can continuously be measured.
On the basis of the above embodiments, grease color detection method provided in an embodiment of the present invention further includes, according to institute
The chromatic value for stating grease to be measured judges the grade of the grease.
Specifically, according to national edible oil grade defining standard, the oil sample of each equal level edible oils is collected, in use
The chromatic value of grease detection device survey calculation different brackets grease is stated, statistical data delimited out corresponding to different oil product grades
Chromatic value range, by fitting algorithm modify program so that finally can judge the grade of oil product according to measurement data.This
The grease color detection system that inventive embodiments provide judges the grade of oil product according to the chromatic value of the grease to be measured, 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；Correspondingly, described
Computing device according to multi collect to spectroscopic data be averaged, and spectrum analysis is carried out using logarithm method, calculate it is described to
Survey the chromatic value of grease.The embodiment of the present invention takes the measurement method of mean value using repeatedly measurement, improves the reliable of measurement result
Property.
Grease color system and method provided by the invention builds optical path according to the respective characteristic of optical element, uses line
Array ccd sensor acquires spectroscopic data, and spectroscopic data is passed to computing device by USB data line, is marked and is surveyed by mercury lamp
The curve of spectrum for obtaining the grease to be measured, the curve of spectrum of grease to be measured is measured by mercury lamp label, carries out light using logarithm method
Spectrum analysis calculates the chromatic value of grease to be measured.Compared with existing Lovibond test, grease color automatic measurement is realized,
The influence for avoiding the human error and environmental factor in visual measurement process, reduces labor intensity, improves measurement accuracy
And measuring speed；The measurement method that mean value is taken using multiple measurement, improves the reliability of measurement result.
The present invention directly handles spectrum using logarithm method, reduces and retrieves Lovibond standard color chips deposit database
Time consumed by matching, arithmetic speed is improved, the working time is saved.Grease color detection system provided by the invention,
Compact hardware, it is at low cost, meet China's edible oil grade defining standard, performance is stablized, can continuously be measured.
Finally, the present processes are only preferable embodiment, it is 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 replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (9)
1. a kind of grease color detection system, which is characterized in that including light processor and computing device, the light processor
Including light source, the first collimation lens, sample cell, cuvette, cylindrical 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 placed in the sample cell in the cuvette；The light that light source issues penetrates
First collimation lens and sample cell reach linear CCD sensor through cylindrical mirror after optical grating diffraction and constitute optical path；
The computing device, the spectroscopic data for being acquired according to linear CCD sensor are measured described to be measured by mercury lamp label
The curve of spectrum of grease, and spectrum analysis is carried out using logarithm method, calculate the chromatic value of grease to be measured；
Wherein, described to carry out spectrum analysis using logarithm method, the chromatic value for calculating grease to be measured includes:
Measure no sample when transmitted light intensity with wavelength variation TIt is emptyThen oil sample to be measured is put into sample cell and measured by (λ)
Sample spectra TSampleTwo spectrum are divided by obtain the transmitted spectrum T=T of sample by (λ)Sample(λ)/TIt is empty(λ)；
Transmitted spectrum T is divided for wavelength selective transmission part T (λ) and common transmissive portion T0, find institute sample transmitted spectrum T
Maximum of T0, calculate wavelength selective transmission fractional transmission spectrum T (λ)=T/T0, measure R, Y, the wavelength selection that B numerical value is 10
Transmission spectrum calculates logarithmic form spectrum logY10(λ)、logR10(λ) and logB10(λ), wherein R, Y, B numerical value unit are Luo Wei
Friend's unit；
Calculate 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 is visible wavelength maximum value；λ min is visible light
Wavelength minimum (X-Guang Pu)；T0For transmissive portion common in transmitted spectrum；Y10For Y10The maximum value of (λ) curve of spectrum；R10For R10(λ) light
The maximum value of spectral curve；B10For B10The maximum value of (λ) curve of spectrum.
2. grease color detection system according to claim 1, which is characterized in that the light processor further includes optics
Aperture, adjustable slit, the second collimation lens and third collimation lens, the optics aperture include the first optics aperture and the second light
Learn aperture；
Second collimation lens, adjustable slit and third collimation lens be successively set on the sample cell and the cylindrical 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 described
Between first collimation lens and the sample cell, the second optics aperture setting is saturating in the sample cell and second collimation
Between mirror.
3. grease color detection system according to claim 1, which is characterized in that the computing device is also used to basis
The chromatic value of the grease to be measured, judges the grade of oil product.
4. grease color detection system according to claim 1, which is characterized in that the light processor is placed in camera bellows
In, the surface of the camera bellows is equipped with switch, power interface, USB interface and sample and places entrance, and the light source is iodine-tungsten lamp.
5. grease color detection system according to claim 1, which is characterized 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 computer.
6. a kind of grease color detection method characterized by comprising
Step S1 selects stable light source, and the cuvette equipped with grease to be measured is placed in sample cell；
The spectroscopic data of step S2, linear CCD sensor acquisition are passed to computing device through USB data line, are marked and are surveyed by mercury lamp
Obtain the curve of spectrum of the grease to be measured；
Step S3, computing device carry out spectrum analysis using logarithm method, calculate to be measured according to the curve of spectrum of the grease to be measured
The chromatic value of grease；
Described to carry out spectrum analysis using logarithm method in the step S3, the chromatic value for calculating grease to be measured includes:
Step S31, measure no sample when transmitted light intensity with wavelength variation TIt is emptyThen oil sample to be measured is put into sample by (λ)
Slot measures sample spectra TSampleTwo spectrum are divided by obtain the transmitted spectrum T=T of sample by (λ)Sample(λ)/TIt is empty(λ)；
Step S32 divides transmitted spectrum T for wavelength selective transmission part T (λ) and common transmissive portion T0, it is saturating to find institute's sample
Penetrate the maximum of T of spectrum T0, calculate wavelength selective transmission fractional transmission spectrum T (λ)=T/T0, measure R, Y, the wave that B numerical value is 10
Long selective transmission spectrum, calculates logarithmic form spectrum logY10(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:
In formula, r, y, b, w are the chromatic value of each color of grease to be measured；λ max is visible wavelength maximum value；λ min is visible light
Wavelength minimum (X-Guang Pu)；T0For transmissive portion common in transmitted spectrum；Y10For Y10The maximum value of (λ) curve of spectrum；R10For R10(λ) light
The maximum value of spectral curve；B10For B10The maximum value of (λ) curve of spectrum.
7. grease color detection method according to claim 6, which is characterized in that the method 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, which is characterized in that it is described measured by mercury lamp label 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 and 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, calibrates linear CCD sensor, calculates the linear corresponding relation of CCD wavelength and pixel；
Wavelength at known mercury lamp light source wave crest finds the coordinate of the corresponding pixel of two groups of wave crests, obtains line array CCD by fitting and passes
Relationship between sensor wavelength/pixel, by the curve of spectrum that linear CCD sensor measures by light intensity/pixel relationship be converted into light intensity/
Wavelength relationship, to obtain the curve of spectrum of grease to be measured.
9. grease color detection method according to claim 7, which is characterized in that the linear CCD sensor is repeatedly adopted
Collect the spectroscopic data of sample；Correspondingly, the computing device according to multi collect to spectroscopic data be averaged, pass through mercury lamp
Label 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710322691.0A CN107064023B (en) | 2017-05-09 | 2017-05-09 | A kind of grease color detection system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710322691.0A CN107064023B (en) | 2017-05-09 | 2017-05-09 | A kind of grease color detection system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107064023A CN107064023A (en) | 2017-08-18 |
| CN107064023B true CN107064023B (en) | 2019-10-11 |
Family
ID=59597558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710322691.0A Active CN107064023B (en) | 2017-05-09 | 2017-05-09 | A kind of grease color detection system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107064023B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114689528B (en) * | 2022-06-01 | 2022-08-23 | 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2240722A (en) * | 1938-04-04 | 1941-05-06 | Harold A Snow | Color analyzer |
| JP2004347578A (en) * | 2003-05-20 | 2004-12-09 | Famiyu:Kk | Simple colorimeter for food oil, and food oil administrative feed system using the same |
| CN2869851Y (en) * | 2005-10-24 | 2007-02-14 | 杨红卫 | Grease colour automatic detection device |
| CN103196559A (en) * | 2013-02-28 | 2013-07-10 | 邢建国 | Electronic Lovibond color measurement method and detection system thereof |
| CN103728023A (en) * | 2014-01-02 | 2014-04-16 | 张守明 | Lovibond chroma scale spectrograph color measuring device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005221307A (en) * | 2004-02-04 | 2005-08-18 | Dkk Toa Corp | Chromoscope |
-
2017
- 2017-05-09 CN CN201710322691.0A patent/CN107064023B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2240722A (en) * | 1938-04-04 | 1941-05-06 | Harold A Snow | Color analyzer |
| JP2004347578A (en) * | 2003-05-20 | 2004-12-09 | Famiyu:Kk | Simple colorimeter for food oil, and food oil administrative feed system using the same |
| CN2869851Y (en) * | 2005-10-24 | 2007-02-14 | 杨红卫 | Grease colour automatic detection device |
| CN103196559A (en) * | 2013-02-28 | 2013-07-10 | 邢建国 | Electronic Lovibond color measurement method and detection system thereof |
| CN103728023A (en) * | 2014-01-02 | 2014-04-16 | 张守明 | Lovibond chroma scale spectrograph color measuring device and method |
Non-Patent Citations (1)
| Title |
|---|
| 油脂色泽测定方法研究进展;孙凤霞 等;《标准与检测》;20021231(第4期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107064023A (en) | 2017-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105157842B (en) | A kind of the double light path spectrophotometric color measurement instrument and optimization method of band repeatability optimization device | |
| CN101782428A (en) | Spectrum self-correction photometer and measuring method thereof | |
| CN209085766U (en) | A kind of Spectral radiance measurement device | |
| CN107064023B (en) | A kind of grease color detection system and method | |
| Fiorentin et al. | Detector-based calibration for illuminance and luminance meters—Experimental results | |
| CN106679811B (en) | A kind of grading automatical measuring method of diamond color | |
| EP1914529A1 (en) | Device and method for analyzing the apparent colour and the gonio reflectance of an object | |
| JPS617445A (en) | Oxidizing degree judging apparatus of copper oxide film | |
| CN201892573U (en) | Near-infrared radiation thermometer | |
| CN1311230C (en) | Quickly measuring method and device for lens transmittivity | |
| CN103398946B (en) | A kind of color of liquid with reference transmission method pick-up unit | |
| WO2023193287A1 (en) | Dual-optical-path spectrometer, color measurement apparatus, and calibration method | |
| CN103383347A (en) | Absolute measuring method and apparatus of non-linear error | |
| Neyezhmakov et al. | Increasing the measurement accuracy of wide-aperture photometer based on digital camera | |
| RU2644439C2 (en) | Method and device for quality control of product | |
| Leloup et al. | BRDF and gloss measurements | |
| Qiu et al. | Evaluation of the color measurement based on a microscopic hyperspectral imaging system | |
| CN110146472A (en) | A kind of water turbidity measuring device and method based on photovoltaic effect | |
| CN214794459U (en) | Rapid photoelectric detection device for tea leaf and sucrose incorporation amount by adopting incandescent light source | |
| RU2366907C1 (en) | Method for digital photoelectric colorimetry | |
| Guo et al. | Improvement and optimization of cotton colorimeter based on Hunter color coordinate conversion | |
| CN115077704A (en) | Textile color detection system, color detection method and material detection method | |
| Wang et al. | Fast and high-accuracy spectral measurements of LED by linear CCD sensor and software calibration | |
| JP2002116140A (en) | Method for spectroscopic analysis and spectroscopic analyzer | |
| CN115900944A (en) | Method and system for calibrating radiance responsivity of solar hyperspectral imager |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |