CN117074327A - Method and device for detecting wax content of edible oil - Google Patents
Method and device for detecting wax content of edible oil Download PDFInfo
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- CN117074327A CN117074327A CN202311326487.8A CN202311326487A CN117074327A CN 117074327 A CN117074327 A CN 117074327A CN 202311326487 A CN202311326487 A CN 202311326487A CN 117074327 A CN117074327 A CN 117074327A
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- 239000008157 edible vegetable oil Substances 0.000 title claims abstract description 184
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000007480 spreading Effects 0.000 claims abstract description 59
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 16
- 239000011247 coating layer Substances 0.000 claims abstract description 15
- 238000012512 characterization method Methods 0.000 claims description 40
- 230000009471 action Effects 0.000 claims description 39
- 239000011324 bead Substances 0.000 claims description 38
- 230000000877 morphologic effect Effects 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 17
- 230000008569 process Effects 0.000 abstract description 7
- 238000004458 analytical method Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 abstract description 2
- 239000001993 wax Substances 0.000 description 54
- 238000002425 crystallisation Methods 0.000 description 9
- 230000008025 crystallization Effects 0.000 description 9
- 238000001514 detection method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/02—Investigating surface tension of liquids
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Abstract
The invention relates to the technical field of test analysis, in particular to a method and a device for detecting the wax content of edible oil, which are characterized in that after the surface tension state of an edible oil sample to be detected is detected preliminarily, the spreading mode of the residual edible oil sample to be detected is determined based on the surface tension state of the edible oil sample to be detected, the spreading of the edible oil sample to be detected is stopped when the thickness of a coating layer reaches a certain value, the transparent bearing table is controlled to be cooled to a preset temperature, the chromaticity value of a coating area in a surface image is extracted, and when the variation of the chromaticity value of the coating area is smaller than a preset threshold value in a preset period, the chromaticity value is compared with a plurality of chromaticity values in a pre-built sample database to determine the wax content of the edible oil sample to be detected, and the self-adaptive adjustment operation mode and operation parameters based on the characteristics of the edible oil sample to be detected in the process are improved, so that the efficiency and the effect of detecting the wax content in the edible oil sample to be detected are improved.
Description
Technical Field
The invention relates to the technical field of test analysis, in particular to a method and a device for detecting the wax content of edible oil.
Background
The detection of the wax content of the edible oil is a quantitative determination process of the wax content in the edible oil through a series of experiments and analysis methods, the wax is a solid component in the edible oil, the content of the wax is closely related to the quality, stability and authenticity of the edible oil, the content information of the wax in the edible oil is accurately obtained, and the method has important significance in the aspects of guaranteeing the quality and safety of the edible oil, evaluating the stability, guiding the processing and storage, detecting the authenticity and the like.
Chinese patent publication No.: CN103994983a discloses the following matters, the invention relates to a method for rapidly detecting the wax content in edible vegetable oil, which utilizes the characteristic reaction that the wax in the edible oil can be crystallized and separated out in a low-temperature environment for a certain time to establish the linear relation between the wax content in the oil and the turbidity of a sample, can detect the wax content in the oil according to the turbidity change, and has profound significance on the quality of the edible oil. The invention utilizes the characteristics that the wax in the edible oil is crystallized at a low temperature, the content is in linear change and is easier to crystallize and separate out in the solvent, and has universal applicability in grease.
However, the prior art has the following problems:
in the prior art, the crystallization process of the wax in the edible oil in the low-temperature environment is slower, a large amount of time is consumed when the wax content in a large amount of edible oil samples is detected, the judgment of the crystallization end point in the wax crystallization process is inaccurate, the conventional detection equipment does not consider the factors, and the operation mode and the operation parameters are adaptively adjusted based on the characteristics of the edible oil samples so as to improve the efficiency and the effect of detecting the wax content in the edible oil.
Disclosure of Invention
In order to solve the problems that the crystallization process of the wax in the edible oil in a low-temperature environment is slower, a large amount of time is required to be consumed when the wax content in a large amount of edible oil samples is detected, the judgment of the crystallization end point is inaccurate in the wax crystallization process, and the conventional detection equipment does not consider the self-adaptive adjustment operation mode and operation parameters of the factors, the invention provides a detection method for the wax content of the edible oil, which comprises the following steps:
step S1, obtaining an edible oil sample to be detected, and primarily detecting the surface tension state of the edible oil sample to be detected, wherein the step comprises the steps of dripping a preset amount of the edible oil sample to be detected on a transparent bearing table to form drip beads, collecting surface images of the transparent bearing table through an image collecting unit to extract morphological parameters of the drip beads, and calculating a tension characterization coefficient of the edible oil sample to be detected according to the morphological parameters to determine the surface tension state of the edible oil sample to be detected based on the tension characterization coefficient;
step S2, dripping the residual edible oil sample to be tested right above the drip beads, determining a dispersing mode for dispersing the edible oil sample to be tested on the transparent bearing table based on the surface tension state of the edible oil sample to be tested, wherein the dispersing mode comprises a first dispersing mode and a second dispersing mode,
the first scattering mode is to control the transparent bearing platform to alternately execute a first scattering action and a second scattering action;
the second dispersion mode is to control the transparent bearing table to execute a first dispersion action and adjust action parameters of the transparent bearing table based on the tension characterization coefficient;
the first scattering action is that the transparent bearing table vibrates, and the second scattering action is that the transparent bearing table tilts and continuously changes the tilting direction;
step S3, stopping spreading the edible oil sample to be tested based on the thickness of the edible oil sample coating layer to be tested on the transparent bearing table, and controlling the transparent bearing table to cool to a preset temperature;
s4, controlling the image acquisition unit to acquire the surface image of the transparent bearing table, extracting the chromaticity value of a coating area in the surface image, and comparing the chromaticity value with a plurality of chromaticity values in a pre-constructed sample database under a preset condition to determine the wax content of an edible oil sample to be detected;
the preset condition is that the chromaticity value variation of the coating area is smaller than a preset threshold value in a preset period.
Further, in the step S1, morphological parameters of the beads are extracted, wherein,
the morphological parameters are the outline area of the drop bead and the maximum value of the height of the outer surface of the drop bead from the transparent bearing table.
Further, in the step S1, a tension characterization coefficient of the edible oil sample to be measured is calculated according to the morphological parameter, wherein,
calculating a tension characterization coefficient T of the edible oil sample to be measured according to a formula (1),
，
in the formula (1), S represents the outline area of the bead, S0 represents a preset area comparison parameter, hm represents the maximum value of the height of the outer surface of the bead from the transparent bearing table, and Hm0 represents a preset height comparison parameter.
Further, in the step S1, the surface tension state of the edible oil sample to be tested is determined based on the tension characterization coefficient, wherein,
comparing the tension characterization coefficient with a preset first tension comparison threshold value,
if the comparison result meets the first tension condition, determining that the surface tension state of the edible oil sample to be tested is the first tension state;
if the comparison result meets a second tension condition, determining that the surface tension state of the edible oil sample to be tested is a second tension state;
the first tension condition is that the tension characterization coefficient is larger than or equal to the first tension contrast threshold value, and the second tension condition is that the tension characterization coefficient is smaller than the first tension contrast threshold value.
Further, in the step S2, a spreading manner of spreading the edible oil sample to be measured on the transparent bearing table is determined based on the surface tension state of the edible oil sample to be measured, wherein,
under a first state condition, determining a spreading mode of spreading the edible oil sample to be tested on the transparent bearing table as the first spreading mode;
under the second state condition, determining that the spreading mode of spreading the edible oil sample to be tested on the transparent bearing table is the second spreading mode;
the first state condition is that the surface tension state of the edible oil sample to be measured is the first tension state, and the second state condition is that the surface tension state of the edible oil sample to be measured is the second tension state.
Further, in the step S2, an action parameter of the transparent bearing table is adjusted based on the tension characterization coefficient, wherein,
the action parameters comprise vibration frequency, the vibration frequency of a vibration unit of the transparent bearing table is controlled to be increased, and the increase is determined based on the tension characterization coefficient.
Further, in the step S3, based on whether the spreading of the edible oil sample to be measured on the transparent bearing table is stopped or not by the thickness of the edible oil sample coating layer to be measured, wherein,
comparing the thickness of the coating layer with a preset thickness comparison threshold value,
under the preset height contrast condition, judging that the spreading of the edible oil sample to be tested is stopped;
the preset height comparison condition is that the thickness of the coating layer is larger than or equal to the thickness comparison threshold value.
Further, in said step S4, said sample database is constructed, comprising,
and (3) measuring the chromaticity values of a plurality of edible oil samples with known wax content through the steps S1-S4, establishing association relations between the chromaticity values and the corresponding wax content, and storing the chromaticity values, the wax content and the association relations into a single database to obtain the sample database.
Further, in the step S4, the wax content of the edible oil sample to be measured is determined according to the comparison result of the colorimetric values and a plurality of colorimetric values in a pre-constructed sample database, wherein,
under a preset condition, determining that the wax content of the edible oil sample to be detected is the wax content related to the chromaticity value in the sample database;
the preset condition is that the difference value between the chromaticity value and the chromaticity value stored in the sample database is smaller than a preset difference value comparison threshold value.
Further, in the step S4, the wax content of the edible oil sample to be measured is determined according to the comparison result of the colorimetric values and a plurality of colorimetric values in a pre-constructed sample database, wherein,
and if the difference value between the chromaticity value and the chromaticity value stored in the sample database is smaller than a preset difference value comparison threshold value, determining that the wax content of the edible oil sample to be detected is the wax content associated with the chromaticity value in the sample database.
Also provides a device applied to the edible oil wax content detection method, which comprises,
the transparent bearing table comprises a tray, a first telescopic rod and a second telescopic rod which are movably connected with the bottom of the tray and used for driving the transparent bearing table to execute the second scattering action, and a vibrating unit and a cooling unit, wherein the vibrating unit is used for driving the transparent bearing table to execute the first scattering action, and the cooling unit is used for cooling the transparent bearing table;
the image acquisition unit is arranged at one side of the transparent bearing table and is used for shooting images on the surface of the transparent bearing table;
and the controller is connected with the transparent bearing table and used for controlling the first telescopic rod, the second telescopic rod, the vibration unit and the cooling unit.
Compared with the prior art, the method has the advantages that after the surface tension state of the edible oil sample to be detected is detected preliminarily, the spreading mode of the residual edible oil sample to be detected on the transparent bearing table is determined based on the surface tension state of the edible oil sample to be detected, the spreading of the edible oil sample to be detected is stopped when the thickness of the coating layer reaches a certain value, the transparent bearing table is controlled to be cooled to a preset temperature, the chromaticity value of the coating area in the surface image is extracted, and when the chromaticity value variation of the coating area is smaller than a preset threshold value in a preset period, the chromaticity value is compared with a plurality of chromaticity values in the sample database constructed in advance to determine the wax content of the edible oil sample to be detected, and the running mode and the running parameters are adjusted in a self-adaptive mode based on the characteristics of the edible oil sample to be detected in the process, so that the efficiency and the effect of detecting the wax content in the edible oil sample to be detected are improved.
In particular, in the invention, the form parameters of the drop beads, namely the outline area of the drop beads and the maximum value of the height of the outer surface of the drop beads from the transparent bearing table are considered by calculating the tension characterization coefficient, so that the surface tension of the drop beads is characterized, in actual conditions, if the surface tension of the drop beads is larger, the drop beads are less prone to scattering on the transparent bearing table, so that the scattering effect of an edible oil sample to be measured on the transparent bearing table is poorer, the situation is dataized through the tension characterization coefficient, a proper scattering mode is conveniently determined based on the tension characterization coefficient, and the scattering effect of the edible oil sample to be measured on the transparent bearing table is improved.
In particular, in the invention, the rest edible oil sample to be measured is dropped right above the drop beads, and the spreading mode of the edible oil sample to be measured on the transparent bearing table is determined based on the surface tension state of the edible oil sample to be measured, in the actual situation, the first tension state of the edible oil sample to be measured represents the larger surface tension of the edible oil sample to be measured, and the edible oil sample to be measured is not easy to uniformly spread on the transparent bearing table, so that the transparent bearing table is controlled to alternately execute the first spreading action and the second spreading action, the surface tension of the edible oil sample to be measured is represented by the second tension state of the edible oil sample to be measured, the spreading effect of the edible oil sample to be measured is smaller on the transparent bearing table, the spreading effect of the edible oil sample to be measured on the transparent bearing table is better, the transparent bearing table is controlled to execute the first spreading action, the action parameters of the transparent bearing table are adaptively adjusted when the first spreading action is executed, the spreading effect of the edible oil sample to be measured under the second tension state is ensured, the spreading efficiency is improved on the basis of guaranteeing the spreading effect of the edible oil sample to be measured by adopting different spreading modes under different tension states, and the edible oil sample to be measured is greatly shortened, the edible oil sample to be measured under the condition of low temperature is required to be measured, and the edible oil sample to be measured is detected.
Particularly, in the invention, the image acquisition unit is controlled to acquire the surface image of the transparent bearing table, the chromaticity value of the coating area in the surface image is extracted, under the preset condition, the chromaticity value is compared with a plurality of chromaticity values in a pre-constructed sample database to determine the wax content of the edible oil sample to be tested, in the invention, the edible oil sample to be tested is scattered on the transparent bearing table, the chromaticity change condition of the coating area is more beneficial to observation, in the actual condition, when the wax in the edible oil sample to be tested is completely crystallized, the chromaticity value change of the coating area is very tiny, whether the wax in the edible oil sample to be tested is completely crystallized is accurately judged by detecting the chromaticity value change condition of the coating area, and the wax content of the edible oil sample to be tested is determined by comparing with the chromaticity value in the sample database when the crystallization is completely finished, so that the detection precision of the chromaticity value of the edible oil sample to be tested at the crystallization end point is improved, and the detection effect of the wax content of the edible oil sample to be tested is further improved.
Drawings
FIG. 1 is a schematic diagram of steps of a method for detecting wax content of edible oil and fat according to an embodiment of the invention;
FIG. 2 is a flow chart for determining the surface tension state of an edible oil sample to be measured according to an embodiment of the present invention;
FIG. 3 is a flow chart of a control for spreading edible oil samples to be tested according to an embodiment of the invention;
FIG. 4 is a schematic block diagram of a transparent pallet according to an embodiment of the invention;
in the figure, 1: tray, 2: first telescopic link, 3: and a second telescopic rod.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, fig. 2, and fig. 3, which are respectively a schematic step diagram of a method for detecting the content of edible oil wax, a surface tension state determination flowchart of an edible oil sample to be detected, and a control flowchart of spreading the edible oil sample to be detected, the method for detecting the content of edible oil wax according to the embodiment of the invention comprises:
step S1, obtaining an edible oil sample to be detected, and primarily detecting the surface tension state of the edible oil sample to be detected, wherein the step comprises the steps of dripping a preset amount of the edible oil sample to be detected on a transparent bearing table to form drip beads, collecting surface images of the transparent bearing table through an image collecting unit to extract morphological parameters of the drip beads, and calculating a tension characterization coefficient of the edible oil sample to be detected according to the morphological parameters to determine the surface tension state of the edible oil sample to be detected based on the tension characterization coefficient;
step S2, dripping the residual edible oil sample to be tested right above the drip beads, determining a dispersing mode for dispersing the edible oil sample to be tested on the transparent bearing table based on the surface tension state of the edible oil sample to be tested, wherein the dispersing mode comprises a first dispersing mode and a second dispersing mode,
the first scattering mode is to control the transparent bearing platform to alternately execute a first scattering action and a second scattering action;
the second dispersion mode is to control the transparent bearing table to execute a first dispersion action and adjust action parameters of the transparent bearing table based on the tension characterization coefficient;
the first scattering action is that the transparent bearing table vibrates, and the second scattering action is that the transparent bearing table tilts and continuously changes the tilting direction;
step S3, stopping spreading the edible oil sample to be tested based on the thickness of the edible oil sample coating layer to be tested on the transparent bearing table, and controlling the transparent bearing table to cool to a preset temperature;
s4, controlling the image acquisition unit to acquire the surface image of the transparent bearing table, extracting the chromaticity value of a coating area in the surface image, and comparing the chromaticity value with a plurality of chromaticity values in a pre-constructed sample database under a preset condition to determine the wax content of an edible oil sample to be detected;
the preset condition is that the chromaticity value variation of the coating area is smaller than a preset threshold delta C in a preset period.
Specifically, the coating area is an area coated with an edible oil sample to be measured.
Specifically, in the invention, the image acquisition unit is controlled to acquire the surface image of the transparent bearing table, the chromaticity value of the coating area in the surface image is extracted, under the preset condition, the chromaticity value is compared with a plurality of chromaticity values in a pre-constructed sample database to determine the wax content of the edible oil sample to be tested.
Specifically, in this embodiment, the predetermined amount should be within a reasonable interval, and in order to ensure the accuracy of calculation of the tension characterization coefficient of the edible oil sample to be measured, the predetermined amount may be selected from the interval [0.05,0.2] by a person skilled in the art, and the interval is in milliliters.
Specifically, in this embodiment, the predetermined period can be selected from within the interval [3, 10] in minutes by a person skilled in the art.
Specifically, in this embodiment, in order to ensure accuracy of determination of complete crystallization of all waxes in the edible oil sample to be tested, the predetermined threshold Δc should be within a reasonable interval, and in this embodiment, the predetermined threshold Δc is determined based on the brightness maximum value Cm, and Δc=g×cm is set, where g represents a scale factor, and 0.1 < g < 0.25.
Specifically, the specific structure of the image acquisition unit is not limited, and the image acquisition unit can be a depth camera, so that the function of shooting the depth image can be completed, and the image acquisition unit is a mature technology and is not described in detail.
Specifically, the specific manner of acquiring the morphological parameters, the thickness of the coating layer and the chromaticity value in the surface image is not limited, and the image processing algorithm capable of identifying the morphological parameters, the thickness of the coating layer and the chromaticity value in the surface image can be introduced into a computer on site in advance, and the corresponding function is realized after the computer analysis.
Specifically, in the step S1, morphological parameters of the beads are extracted, wherein,
the morphological parameters are the outline area of the drop bead and the maximum value of the height of the outer surface of the drop bead from the transparent bearing table.
Specifically, in the step S1, a tension characterization coefficient of the edible oil sample to be measured is calculated according to the morphological parameter, wherein,
calculating a tension characterization coefficient T of the edible oil sample to be measured according to a formula (1),
，
in the formula (1), S represents the outline area of the bead, S0 represents a preset area comparison parameter, hm represents the maximum value of the height of the outer surface of the bead from the transparent bearing table, and Hm0 represents a preset height comparison parameter.
Specifically, in this example, S0 is calculated based on the contour area Se of a droplet formed by dropping 0.1mL of an edible droplet having a wax content of 0 on a transparent stage, and s0=α1×se is set, where α1 represents a first coefficient, 0.7 < α1 < 0.9.
Specifically, in this example, hm0 is calculated based on the maximum value Hme of the height of the outer surface of the droplet formed by dropping 0.1mL of edible oil having a wax content of 0 on the transparent stage from the transparent stage, and hm0=α2× Hme is set, where α2 represents the second coefficient, and 1.1 < α2 < 1.3.
Specifically, in the invention, the morphological parameters of the drop beads, namely the outline area of the drop beads and the maximum value of the height of the outer surface of the drop beads from the transparent bearing table are considered by calculating the tension characterization coefficient, so that the surface tension of the drop beads is characterized, in actual conditions, if the surface tension of the drop beads is larger, the drop beads are less prone to scattering on the transparent bearing table, so that the scattering effect of the edible oil sample to be measured on the transparent bearing table is poorer, the situation is dataized by the tension characterization coefficient, a proper scattering mode is conveniently determined based on the tension characterization coefficient, and the scattering effect of the edible oil sample to be measured on the transparent bearing table is improved.
Specifically, referring to fig. 2, in step S1, a surface tension state of the edible oil sample to be measured is determined based on the tension characterization coefficient, wherein,
comparing the tension characterization coefficient T with a preset first tension comparison threshold T1,
if the comparison result meets the first tension condition, determining that the surface tension state of the edible oil sample to be tested is the first tension state;
if the comparison result meets a second tension condition, determining that the surface tension state of the edible oil sample to be tested is a second tension state;
wherein, the first tension condition is T not less than T1, and the second tension condition is T < T1.
Specifically, in the present embodiment, T1 is calculated based on the tension characterization coefficient Te calculated in the case of s=s0 and hm=hm0, and t1=1.1×te is set.
Specifically, in the step S2, a spreading manner of spreading the edible oil sample to be measured on the transparent bearing table is determined based on the surface tension state of the edible oil sample to be measured, wherein,
under a first state condition, determining a spreading mode of spreading the edible oil sample to be tested on the transparent bearing table as the first spreading mode;
under the second state condition, determining that the spreading mode of spreading the edible oil sample to be tested on the transparent bearing table is the second spreading mode;
the first state condition is that the surface tension state of the edible oil sample to be measured is the first tension state, and the second state condition is that the surface tension state of the edible oil sample to be measured is the second tension state.
Specifically, in the invention, the rest edible oil sample to be measured is dropped right above the drop beads, and the spreading mode of the edible oil sample to be measured on the transparent bearing table is determined based on the surface tension state of the edible oil sample to be measured, in the actual situation, the first tension state of the edible oil sample to be measured represents the larger surface tension of the edible oil sample to be measured, and the edible oil sample to be measured is not easy to uniformly spread on the transparent bearing table, so that the transparent bearing table is controlled to alternately execute the first spreading action and the second spreading action, the surface tension of the edible oil sample to be measured is represented by the second tension state of the edible oil sample to be measured, the spreading effect of the edible oil sample to be measured is smaller on the transparent bearing table, the spreading effect of the edible oil sample to be measured on the transparent bearing table is better, the transparent bearing table is controlled to execute the first spreading action, the action parameter of the transparent bearing table is adaptively adjusted when the first spreading action is executed, the spreading effect of the edible oil sample to be measured under the second tension state is ensured, the spreading efficiency of the edible oil sample to be measured is improved on the basis of ensuring the spreading effect of the edible oil sample to be measured under different tension states, and the edible oil sample to be measured is greatly shortened, the edible oil sample to be measured under the condition of low temperature is required to be measured, and the edible oil sample is detected.
Specifically, in the step S2, an action parameter of the transparent bearing table is adjusted based on the tension characterization coefficient, wherein,
the action parameters comprise vibration frequency, the vibration frequency of a vibration unit of the transparent bearing table is controlled to be increased, and the increase is determined based on the tension characterization coefficient;
at least three frequency adjustment modes are provided in this embodiment, wherein,
comparing the tension characterization coefficient T with a preset second tension comparison threshold T2 and a third tension comparison threshold T3, wherein T2 is smaller than T3 and smaller than T1, and judging a frequency adjustment mode when adjusting the vibration frequency of the vibration unit of the transparent bearing table according to the comparison result,
the first frequency adjustment mode is to adjust the vibration frequency of the vibration unit of the transparent bearing platform to a first vibration frequency value F1 according to a preset first frequency adjustment parameter F1, and set F1=F0+f1;
the second frequency adjustment mode is to adjust the vibration frequency of the vibration unit of the transparent bearing platform to a second vibration frequency value F2 according to a preset second frequency adjustment parameter F2, and set F2=F0+f2;
the third frequency adjustment mode is to adjust the vibration frequency of the vibration unit of the transparent bearing platform to a third vibration frequency value F3 according to a preset third frequency adjustment parameter F3, and set F3=F0+f3;
the first frequency adjustment mode needs to meet T more than or equal to T3, the second frequency adjustment mode needs to meet T2 less than or equal to T3, the third frequency adjustment mode needs to meet T less than T2, F1 > F2 > F3, F1 > F2 > F3, and F0 represents the initial vibration frequency of the transparent bearing table vibration unit.
Specifically, in this embodiment, T2 and T3 are calculated based on T1, and 0.4T1 < T2 < 0.6T1 < T3 < 0.8T1 is set.
Specifically, in the present embodiment, F1, F2, and F3 are calculated based on F0, and 0.5F0 > F1 > 0.4F0 > F2 > 0.3F0 > F3 > 0.2F0 is set.
Specifically, as shown in fig. 3, in step S3, the spreading of the edible oil sample to be measured is stopped based on whether the thickness of the edible oil sample coating layer to be measured on the transparent bearing table is stopped, wherein,
comparing the thickness Hc of the coating layer with a preset thickness comparison threshold Hc0,
under the preset height contrast condition, judging that the spreading of the edible oil sample to be tested is stopped;
wherein the preset height comparison condition is Hc not less than Hc0.
Specifically, in this embodiment, to ensure the efficiency and effect of determining the wax content of the edible oil sample to be tested, hc0 is selected from the interval [0.5,3], and the interval unit is millimeter.
In particular, in said step S4, said sample database is constructed, comprising,
and (3) measuring the chromaticity values of a plurality of edible oil samples with known wax content through the steps S1-S4, establishing association relations between the chromaticity values and the corresponding wax content, and storing the chromaticity values, the wax content and the association relations into a single database to obtain the sample database.
Specifically, in the step S4, the wax content of the edible oil sample to be measured is determined according to the comparison result of the colorimetric values and a plurality of colorimetric values in a pre-constructed sample database, wherein,
and if the difference value between the chromaticity value and the chromaticity value stored in the sample database is smaller than a preset difference value comparison threshold value delta Ce, determining that the wax content of the edible oil sample to be detected is the wax content associated with the chromaticity value in the sample database.
Specifically, in the present embodiment, Δce is calculated based on a predetermined threshold Δc, and Δce=0.2× Δc is set.
Specifically, referring to fig. 4, there is also provided a device for detecting wax content of edible oil and fat, comprising,
the transparent bearing table comprises a tray 1, a first telescopic rod 2 and a second telescopic rod 3 which are movably connected with the bottom of the tray 1 and used for driving the transparent bearing table to execute the second scattering action, and a vibration unit and a cooling unit, wherein the vibration unit and the cooling unit are used for driving the transparent bearing table to execute the first scattering action;
the image acquisition unit is arranged at one side of the transparent bearing table and is used for shooting images on the surface of the transparent bearing table;
and the controller is connected with the transparent bearing table and used for controlling the first telescopic rod 2, the second telescopic rod 3, the vibration unit and the cooling unit.
Specifically, the specific structure of the temperature control unit is not limited, and the temperature control unit can be a cooling plate or other forms, and only the function of controlling the temperature of the transparent bearing table is required to be completed, and the detailed description is omitted here.
Specifically, the specific structure of the vibration unit is not limited, and the vibration unit can be a vibrator which can only drive the transparent bearing table to slightly vibrate, which is the prior art and is not repeated.
In particular, the present invention is not limited to the specific structure of the controller, and the controller may be constituted by logic components including a field programmable part, a computer, and a microprocessor in the computer.
The mode of controlling each component by the controller is not particularly limited, and the controller can be connected by wire or wirelessly, which is the prior art and is not repeated.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
Claims (10)
1. The method for detecting the wax content of the edible oil is characterized by comprising the following steps of:
step S1, obtaining an edible oil sample to be detected, and primarily detecting the surface tension state of the edible oil sample to be detected, wherein the step comprises the steps of dripping a preset amount of the edible oil sample to be detected on a transparent bearing table to form drip beads, collecting surface images of the transparent bearing table through an image collecting unit to extract morphological parameters of the drip beads, and calculating a tension characterization coefficient of the edible oil sample to be detected according to the morphological parameters to determine the surface tension state of the edible oil sample to be detected based on the tension characterization coefficient;
step S2, dripping the residual edible oil sample to be tested right above the drip beads, determining a dispersing mode for dispersing the edible oil sample to be tested on the transparent bearing table based on the surface tension state of the edible oil sample to be tested, wherein the dispersing mode comprises a first dispersing mode and a second dispersing mode,
the first scattering mode is to control the transparent bearing platform to alternately execute a first scattering action and a second scattering action;
the second dispersion mode is to control the transparent bearing table to execute a first dispersion action and adjust action parameters of the transparent bearing table based on the tension characterization coefficient;
the first scattering action is that the transparent bearing table vibrates, and the second scattering action is that the transparent bearing table tilts and continuously changes the tilting direction;
step S3, stopping spreading the edible oil sample to be tested based on the thickness of the edible oil sample coating layer to be tested on the transparent bearing table, and controlling the transparent bearing table to cool to a preset temperature;
s4, controlling the image acquisition unit to acquire the surface image of the transparent bearing table, extracting the chromaticity value of a coating area in the surface image, and comparing the chromaticity value with a plurality of chromaticity values in a pre-constructed sample database under a preset condition to determine the wax content of an edible oil sample to be detected;
the preset condition is that the chromaticity value variation of the coating area is smaller than a preset threshold value in a preset period.
2. The method for detecting the wax content of edible oil and fat according to claim 1, wherein in the step S1, morphological parameters of the beads are extracted, wherein,
the morphological parameters are the outline area of the drop bead and the maximum value of the height of the outer surface of the drop bead from the transparent bearing table.
3. The method for detecting the wax content of edible oil according to claim 2, wherein in the step S1, a tension characterization coefficient of the edible oil sample to be detected is calculated according to the morphological parameter,
calculating a tension characterization coefficient T of the edible oil sample to be measured according to a formula (1),
，
in the formula (1), S represents the outline area of the bead, S0 represents a preset area comparison parameter, hm represents the maximum value of the height of the outer surface of the bead from the transparent bearing table, and Hm0 represents a preset height comparison parameter.
4. The method for detecting the wax content of edible oil according to claim 3, wherein in the step S1, the surface tension state of the edible oil sample to be detected is determined based on the tension characterization coefficient,
comparing the tension characterization coefficient with a preset first tension comparison threshold value,
if the comparison result meets the first tension condition, determining that the surface tension state of the edible oil sample to be tested is the first tension state;
if the comparison result meets a second tension condition, determining that the surface tension state of the edible oil sample to be tested is a second tension state;
the first tension condition is that the tension characterization coefficient is larger than or equal to the first tension contrast threshold value, and the second tension condition is that the tension characterization coefficient is smaller than the first tension contrast threshold value.
5. The method according to claim 4, wherein in the step S2, a spreading pattern of the edible oil sample to be measured is determined based on a surface tension state of the edible oil sample to be measured, wherein,
under a first state condition, determining a spreading mode of spreading the edible oil sample to be tested on the transparent bearing table as the first spreading mode;
under the second state condition, determining that the spreading mode of spreading the edible oil sample to be tested on the transparent bearing table is the second spreading mode;
the first state condition is that the surface tension state of the edible oil sample to be measured is the first tension state, and the second state condition is that the surface tension state of the edible oil sample to be measured is the second tension state.
6. The method according to claim 1, wherein in the step S2, the operation parameters of the transparent bearing table are adjusted based on the tension characterization coefficient,
the action parameters comprise vibration frequency, the vibration frequency of a vibration unit of the transparent bearing table is controlled to be increased, and the increase is determined based on the tension characterization coefficient.
7. The method according to claim 1, wherein in the step S3, the spreading of the edible oil sample to be measured is stopped based on the thickness of the edible oil sample coating layer to be measured on the transparent bearing table, wherein,
comparing the thickness of the coating layer with a preset thickness comparison threshold value,
under the preset height contrast condition, judging that the spreading of the edible oil sample to be tested is stopped;
the preset height comparison condition is that the thickness of the coating layer is larger than or equal to the thickness comparison threshold value.
8. The method for detecting the wax content of edible oil and fat according to claim 1, wherein in the step S4, the sample database is constructed, comprising,
and (3) measuring the chromaticity values of a plurality of edible oil samples with known wax content through the steps S1-S4, establishing association relations between the chromaticity values and the corresponding wax content, and storing the chromaticity values, the wax content and the association relations into a single database to obtain the sample database.
9. The method according to claim 1, wherein in the step S4, the wax content of the edible oil sample to be measured is determined based on the comparison result of the colorimetric values and a plurality of colorimetric values in a sample database constructed in advance,
and if the difference value between the chromaticity value and the chromaticity value stored in the sample database is smaller than a preset difference value comparison threshold value, determining that the wax content of the edible oil sample to be detected is the wax content associated with the chromaticity value in the sample database.
10. An apparatus for applying the method for detecting the wax content of edible oil and fat according to any one of claims 1 to 9, comprising,
the transparent bearing table comprises a tray, a first telescopic rod and a second telescopic rod which are movably connected with the bottom of the tray and used for driving the transparent bearing table to execute the second scattering action, and a vibrating unit and a cooling unit, wherein the vibrating unit is used for driving the transparent bearing table to execute the first scattering action, and the cooling unit is used for cooling the transparent bearing table;
the image acquisition unit is arranged at one side of the transparent bearing table and is used for shooting images on the surface of the transparent bearing table;
and the controller is connected with the transparent bearing table and used for controlling the first telescopic rod, the second telescopic rod, the vibration unit and the cooling unit.
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6841779B1 (en) * | 2001-08-24 | 2005-01-11 | University Of Utah Research Foundation | Measurement of wax precipitation temperature and precipitated solid weight percent versus temperature by infrared spectroscopy |
| CN103868881A (en) * | 2012-12-13 | 2014-06-18 | 中国石油化工股份有限公司 | Method for test of wax content in asphalt |
| CN103994983A (en) * | 2014-06-09 | 2014-08-20 | 中粮北海粮油工业（天津）有限公司 | Quick detection method of content of wax in edible vegetable fat |
| CN104198444A (en) * | 2014-09-17 | 2014-12-10 | 道道全粮油股份有限公司 | Device and method for quickly measuring content of wax in oil product |
| CN204086138U (en) * | 2014-09-17 | 2015-01-07 | 道道全粮油股份有限公司 | The device of wax content in a kind of Fast Measurement oil product |
| KR101513674B1 (en) * | 2015-01-28 | 2015-04-22 | 한국해양대학교 산학협력단 | Visualized wax appearance temperature meaurement system and method |
| CN104677784A (en) * | 2015-03-04 | 2015-06-03 | 苏州创恩机械设备有限公司 | Plate surface oil film measurement device and method adopting same |
| WO2016209248A1 (en) * | 2015-06-26 | 2016-12-29 | Schlumberger Canada Limited | Microfluidic method for detection of fines, waxes, and asphaltenes in oil |
| CN106546713A (en) * | 2015-09-18 | 2017-03-29 | 亚申科技研发中心（上海）有限公司 | Wax content in crude oil analyzer |
| CN108458857A (en) * | 2018-05-25 | 2018-08-28 | 中国人民解放军陆军工程大学 | A kind of vibration of optoelectronic device, the gentle pressure environment simulation test system of temperature |
| CN111413294A (en) * | 2020-03-31 | 2020-07-14 | 西北农林科技大学 | Method for rapidly detecting wax in sunflower seed oil |
| US11221274B1 (en) * | 2020-12-09 | 2022-01-11 | Peking University | Light scattering parameter measurement system and its measurement method |
| US20220120653A1 (en) * | 2020-10-19 | 2022-04-21 | University Of Florida Research Foundation, Inc. | System and method for measuring surface tension |
| CN116660135A (en) * | 2023-05-30 | 2023-08-29 | 广东电网有限责任公司广州供电局 | Ageing device for electric power compound grease |
-
2023
- 2023-10-13 CN CN202311326487.8A patent/CN117074327B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6841779B1 (en) * | 2001-08-24 | 2005-01-11 | University Of Utah Research Foundation | Measurement of wax precipitation temperature and precipitated solid weight percent versus temperature by infrared spectroscopy |
| CN103868881A (en) * | 2012-12-13 | 2014-06-18 | 中国石油化工股份有限公司 | Method for test of wax content in asphalt |
| CN103994983A (en) * | 2014-06-09 | 2014-08-20 | 中粮北海粮油工业（天津）有限公司 | Quick detection method of content of wax in edible vegetable fat |
| CN104198444A (en) * | 2014-09-17 | 2014-12-10 | 道道全粮油股份有限公司 | Device and method for quickly measuring content of wax in oil product |
| CN204086138U (en) * | 2014-09-17 | 2015-01-07 | 道道全粮油股份有限公司 | The device of wax content in a kind of Fast Measurement oil product |
| KR101513674B1 (en) * | 2015-01-28 | 2015-04-22 | 한국해양대학교 산학협력단 | Visualized wax appearance temperature meaurement system and method |
| CN104677784A (en) * | 2015-03-04 | 2015-06-03 | 苏州创恩机械设备有限公司 | Plate surface oil film measurement device and method adopting same |
| WO2016209248A1 (en) * | 2015-06-26 | 2016-12-29 | Schlumberger Canada Limited | Microfluidic method for detection of fines, waxes, and asphaltenes in oil |
| CN106546713A (en) * | 2015-09-18 | 2017-03-29 | 亚申科技研发中心（上海）有限公司 | Wax content in crude oil analyzer |
| CN108458857A (en) * | 2018-05-25 | 2018-08-28 | 中国人民解放军陆军工程大学 | A kind of vibration of optoelectronic device, the gentle pressure environment simulation test system of temperature |
| CN111413294A (en) * | 2020-03-31 | 2020-07-14 | 西北农林科技大学 | Method for rapidly detecting wax in sunflower seed oil |
| US20220120653A1 (en) * | 2020-10-19 | 2022-04-21 | University Of Florida Research Foundation, Inc. | System and method for measuring surface tension |
| US11221274B1 (en) * | 2020-12-09 | 2022-01-11 | Peking University | Light scattering parameter measurement system and its measurement method |
| CN116660135A (en) * | 2023-05-30 | 2023-08-29 | 广东电网有限责任公司广州供电局 | Ageing device for electric power compound grease |
Non-Patent Citations (2)
| Title |
|---|
| XUE XIA ET AL.: "Effects of paraffin wax content and test temperature on the stability of water-in-model waxy crude oil emulsions", COLLOIDS AND SURFACES A: PHYSICOCHEMICAL AND ENGINEERING ASPECTS, vol. 652, pages 1 - 12 * |
| 李孟楼等: "花椒种籽油的含蜡量测定与脱蜡", 西北植物学报, vol. 21, no. 2, pages 387 - 390 * |
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|---|---|
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