Colorimetric determination device based on color space processing
By designing a colorimetric measurement device based on color space processing, integrating a standard light source and camera bracket, the automatic operation of the colorimetric tube is achieved, and the problem of inefficient detection of heavy metals of new tobacco products is solved, and accurate quantitative analysis and accuracy are improved.
Patent Information
- Application Number
- CN202421393404.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-06-18
AI Technical Summary
The detection efficiency of heavy metals of new tobacco products in the prior art is low, making it difficult to achieve accurate quantities, and the operation of colorimetric tubes depends on manual labor, which is easy to be confused.
A colorimetric measurement device based on color space processing is designed, integrating a standard light source, a colorimetric background plate and a camera bracket to realize the automatic loading and photography of the colorimetric tube, and semi-quantitative analysis is performed using HSB color space.
It improves detection efficiency, reduces colorimetric tube confusion, realizes accurate quantitative analysis, and improves detection accuracy.
Smart Images
Figure CN223139386U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heavy metal detection, and more specifically, to a colorimetric determination device based on color space processing. Background Art
[0002] New tobacco products such as e-cigarettes and heat-not-burn cigarettes have attracted the attention of tobacco consumers in various countries. However, due to the imperfect laws or relevant management systems regarding new tobacco products in various countries, there is a lack of effective supervision over impurities and harmful substances such as heavy metals, carbonyl compounds, and solvent residues in them.
[0003] Through preliminary exploration, when detecting new tobacco products according to this standard detection method, it is found that the components of different new tobacco products are complex and difficult to digest, and the pretreatment takes a long time; the detection results rely on subjective human judgment, and only qualitative results can be obtained (comparing with the standard color tubes to determine whether the content exceeds the standard), and problems such as the specific content of heavy metals cannot be obtained.
[0004] As the result output of the detection method, the color reaction can use the color space to replace the human eye comparison for more in-depth content analysis. The color space is a mathematical model that defines a set of rules and coordinate systems for describing and quantifying colors. The model stipulates how to represent each color point in the visible spectrum through a set of numerical values. As a standardized representation method of colors, it ensures that color data can be accurately transmitted and reproduced between various devices. Among them, the HSB color model consists of three color parameters: saturation (S), brightness (B), and chromaticity (H), which is closest to the color changes seen by the human eye. During the implementation of this method, it is necessary to take separate photos of multiple color tubes such as standard tubes, sample tubes, and control tubes. In the prior art, there is no dedicated device for operation, and it all depends on manual operation, which not only has low efficiency but also often confuses each color tube. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a colorimetric detection device based on color space processing, which can quickly load and photograph each color tube, thereby improving the detection efficiency and accuracy.
[0006] The embodiments of the utility model are implemented as follows:
[0007] A colorimetric determination device based on color space processing, which includes a box body. The box body includes a bottom plate, a back plate, and a top plate. The back plate is arranged on one side of the bottom plate in the length direction; a standard light source is arranged at the bottom of the top plate, and a solid-color colorimetric background plate is arranged on the back plate; a color tube rack for placing color tubes is arranged on the bottom plate. The color tube rack has a plurality of first placement holes, and the plurality of first placement holes are arranged along the length direction of the bottom plate; a camera bracket for placing a camera is arranged on the side of the color tube rack away from the back plate.
[0008] Further, in other preferred embodiments of the present utility model, the bottom of the colorimetric tube rack is slidably connected to the bottom plate through a slide rail, and the slide rail is arranged along the length direction of the bottom plate.
[0009] Further, in other preferred embodiments of the present utility model, the bottom plate is further provided with a sample tube rack, and the sample tube rack includes a sample turntable. The sample turntable is provided with a plurality of second placement holes for placing sample tubes, and the plurality of second placement holes are arranged along the circumferential direction of the sample turntable. The sample turntable is connected to the rotating shaft of the rotating motor through a crawler.
[0010] Further, in other preferred embodiments of the present utility model, at least one of the plurality of second placement holes is collinear with the plurality of first placement holes.
[0011] Further, in other preferred embodiments of the present utility model, a sample tray is concentrically arranged below the sample turntable. The sample tray is connected to the central position of the sample turntable through a connecting shaft, and the sample tray can support the bottom of the sample tube.
[0012] Further, in other preferred embodiments of the present utility model, the sample tube rack further includes a vertical rod rotatably connected to the bottom plate. The rotating motor is arranged at the top of the vertical rod, and the sample tray is fixedly connected to the vertical rod through a V-shaped connecting rod.
[0013] Further, in other preferred embodiments of the present utility model, the colorimetric background board has a white background board, a black background board and a blue background board which are stacked. The white background board, the black background board and the blue background board are each independently provided with a reel at the top and can be rolled up independently of each other; magnetic strips are arranged at the bottom for magnetic connection with the bottom plate.
[0014] Further, in other preferred embodiments of the present utility model, the right-side areas of the white background board, the black background board and the blue background board are gradually reduced in sequence.
[0015] The beneficial effects of the embodiments of the present utility model are as follows:
[0016] The embodiments of the present utility model provide a colorimetric determination device based on color space processing, including a box body. The box body includes a bottom plate, a back plate and a top plate. The back plate is arranged on one side of the bottom plate in the length direction; a standard light source is arranged at the bottom of the top plate, and a solid-color colorimetric background board is arranged on the back plate; the bottom plate is provided with a colorimetric tube rack for placing colorimetric tubes. The colorimetric tube rack has a plurality of first placement holes, and the plurality of first placement holes are arranged along the length direction of the bottom plate; a camera bracket for placing a camera is arranged on the side of the colorimetric tube rack away from the back plate. This device integrates a standard light source, a colorimetric background board and a photographic device, can quickly load and photograph colorimetric tubes, improve the detection efficiency, and can avoid the confusion of colorimetric tubes. Description of the Drawings
[0017] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related accompanying drawings can also be obtained based on these drawings.
[0018] Figure 1 Schematic diagram of the colorimetric determination device provided by the embodiment of the present utility model;
[0019] Figure 2 Schematic diagram of the colorimetric background plate of the colorimetric determination device provided by the embodiment of the present utility model;
[0020] Figure 3 Top view of the colorimetric tube rack of the colorimetric determination device provided by the embodiment of the present utility model;
[0021] Figure 4 Top view of the sample turntable of the colorimetric determination device provided by the embodiment of the present utility model;
[0022] Figure 5 Schematic diagram of the colorimetric determination device provided by the embodiment of the present utility model in the state of adding reagents;
[0023] Figure 6 Cone model for semi-quantitative analysis provided by the present utility model;
[0024] Figure 7 Schematic diagram of the semi-quantitative analysis method provided by the present utility model;
[0025] Icons: 1, box body; 1-1, top plate; 1-2, back plate; 1-3, bottom plate; 2, standard light source; 3, colorimetric background plate; 3-1, reel; 3-2, white background plate; 3-3, black background plate; 3-4, blue background plate; 3-5, handle; 3-6, magnetic strip; 4, colorimetric tube rack; 4-1, slide rail; 5, sample tube rack; 5-1, sample turntable; 5-2, sample tray; 5-3, crawler; 5-4, rotating motor; 5-5, V-shaped connecting rod; 6, camera bracket. Specific embodiments
[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0027] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.
[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.
[0029] In the present utility model, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.
[0031] The features and performance of the present utility model will be further described in detail below in conjunction with embodiments.
[0032] Embodiment
[0033] This embodiment provides a colorimetric determination device based on color space processing, which includes a box body 1. The box body includes a bottom plate 1-3, a back plate 1-2 and a top plate 1-1. The back plate 1-2 is arranged on one side in the length direction of the bottom plate 1-3. The box body 1 is made of metal and its surface is painted white.
[0034] A standard light source 2 is arranged at the bottom of the top plate 1-1. The standard light source 2 is composed of 5 lamp tubes, and its light source parameters are: color temperature 5300K - 5800K, illuminance 2000 ± 200. Before the test is used, the standard light source 2 needs to be turned on to test the illuminance uniformity. The upper surface of the bottom plate 1-3 is evenly divided into 20 areas, and each area is measured once. The test conditions are satisfied: the illuminance of each area is 2000 ± 200, and the measured illuminance uniformity of each area ≥ 0.8, then the detection can be carried out. The illuminance uniformity = minimum illuminance ÷ average illuminance.
[0035] A solid-color colorimetric background board 3 is arranged on the back plate 1-2. The colorimetric background board 3 has a white background board 3-2, a black background board 3-3 and a blue background board 3-4 arranged in a stacked manner. Reelers 3-1 are independently arranged at the tops of the white background board 3-2, the black background board 3-3 and the blue background board 3-4, and can be rolled up independently of each other; magnetic strips 3-6 are arranged at the bottoms to be magnetically connected to the bottom plate 1-3. The area of the right side regions of the white background board 3-2, the black background board 3-3 and the blue background board 3-4 decreases in sequence. When not in use, each background board is retracted by the reelers 3-1 at the top. When in use, pull the corresponding handle 3-5 to unfold the background board, and then fix it through the magnetic strip 3-6 at the bottom.
[0036] The bottom plate 1-3 is provided with a colorimetric tube rack 4 for placing colorimetric tubes. The colorimetric tube rack 4 has a plurality of first placement holes, and the plurality of first placement holes are arranged along the length direction of the bottom plate 1-3. Optionally, the number of the first placement holes is 6, which are respectively used for placing 5 lead standard solutions with different concentrations and a control solution. The bottom of the colorimetric tube rack 4 is slidably connected to the bottom plate 1-3 through a slide rail 4-1, and the slide rail 4-1 is arranged along the length direction of the bottom plate 1-3. When adding reagents, it can be pulled out to the left; when performing colorimetry, it is pushed back to the original position to the right.
[0037] The bottom plate 1-3 is further provided with a sample tube rack 5 for placing sample tubes. The sample tube rack 5 is provided with a sample turntable 5-1. The sample turntable 5-1 is provided with a plurality of second placement holes for placing sample tubes. The plurality of second placement holes are arranged circumferentially along the sample turntable 5-1. The sample turntable 5-1 is connected to the rotating shaft of a rotating motor 5-4 through a crawler 5-3. Below the sample turntable 5-1, there is a sample tray 5-2 arranged concentrically. The sample tray 5-2 is connected to the central position of the sample turntable 5-1 through a connecting shaft, and the sample tray 5-2 can support the bottom of the sample tube. At least one of the plurality of second placement holes is collinear with the plurality of first placement holes, and colorimetry can be performed by rotating the corresponding sample to this position. The sample tube rack 5 further includes a vertical rod rotatably connected to the bottom plate 1-3. The rotating motor 5-4 is arranged at the top of the vertical rod, and the sample tray 5-2 is fixedly connected to the vertical rod through a V-shaped connecting rod 5-5.
[0038] On one side of the colorimetric tube rack 5 away from the back plate 1-2, there is a camera bracket 6 for placing a camera. The connection between the camera and the camera bracket 6 is detachable, and a corresponding camera can be set according to requirements during actual use. The camera bracket 6 does not need to be fixed to the bottom plate 1-3 to facilitate adjusting the position of the camera bracket 6 at any time.
[0039] The usage method of this colorimetric determination device is as follows:
[0040] 1) When performing detection, pull the colorimetric tube rack 4 out of the box body 1 to the left, place 6 colorimetric tubes, respectively add 5 standard solutions with different concentrations and a control solution, adjust the pH and add a color-developing reagent, then complete the reagent addition of the standard sample, and push the colorimetric tube rack 4 back to the original position.
[0041] 2) Rotate the vertical rod, turn the sample turntable 5-1 out of the box body 1 to the right, place multiple colorimetric tubes in the sample turntable 5-1, respectively add different processed samples, adjust the pH and add a color-developing reagent, complete the reagent addition of the sample to be measured, and after the addition is completed, rotate the vertical rod to reset the sample turntable 5-1.
[0042] 3) Rotate the sample turntable 5-1 to rotate the colorimetric tube of the sample to be measured to a position collinear with the colorimetric tubes of multiple standard solutions. Turn on the standard light source 2, pull down the colorimetric background plates 3 of different colors, and take pictures of the standard solution, the control solution, and the solution to be measured respectively through the camera to collect the image color information of different backgrounds.
[0043] 4) In the HSB color space mode, collect the H, S, and B values of no less than 200×30 pixel points in the bottom area of the colorimetric tube in each photo. The average values of all the H, S, and B values obtained from each photo are taken to obtain the color values H i , S i , B i of each lead standard solution.
[0044] 5) Calculate the comprehensive characterization value MV of each lead standard solution through the following formula i ,
[0045]
[0046] In the formula, the value of i ranges from 1 to 5, corresponding to the lead standard solutions of five different concentrations respectively, and R is the chromaticity corresponding to the pure color background;
[0047] 6) Using the comprehensive characterization value MV i as the ordinate and the concentration C i as the abscissa for curve fitting to obtain the semi-quantitative calculation equation of lead concentration;
[0048] 7) Measure and calculate the comprehensive characterization value MV B of the solution to be measured, substitute it into the semi-quantitative calculation equation, and calculate the lead concentration in the solution to be measured.
[0049] This method uses the HSB color space as the basis of the semi-quantitative model. The HSB color space is an inverted cone, as Figure 6 shown.
[0050] Figure 6 In it, S (saturation) and B (brightness) are two mutually perpendicular color components. The volume of the right tetrahedron formed by the reduction value of S (saturation), the reduction value of brightness (100%-B), and the chromaticity value after background subtraction (R-H) (as Figure 7 shown) is used as the characterization value MV indicating the color depth. The height of the tetrahedron is the reduction value of brightness (100%-B), and the bottom area of the tetrahedron is an isosceles triangle with the chromaticity value after background subtraction (R-H) as the included angle and S (saturation) as the side. The R value depends on the background color. For a white background, the R value is 130°, and for a black background, the R value is 120°.
[0051] In summary, the embodiment of the present utility model provides a colorimetric determination device, which includes a box body. The box body includes a bottom plate, a back plate, and a top plate. The back plate is arranged on one side of the bottom plate in the length direction; a standard light source is arranged at the bottom of the top plate, and a solid-color colorimetric background plate is arranged on the back plate; a colorimetric tube rack for placing colorimetric tubes is arranged on the bottom plate. The colorimetric tube rack has a plurality of first placement holes, and the plurality of first placement holes are arranged along the length direction of the bottom plate; a camera bracket for placing a camera is arranged on the side of the colorimetric tube rack away from the back plate. This device integrates a standard light source, a colorimetric background plate, and a photographic device, can quickly load and photograph colorimetric tubes, improve the detection efficiency, and avoid confusion of colorimetric tubes.
[0052] The foregoing is only the preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A colorimetric determination device based on color space processing, characterized in that, It includes a box body, the box body includes a bottom plate, a back plate and a top plate, and the back plate is arranged on one side of the length direction of the bottom plate; a standard light source is arranged at the bottom of the top plate, and a solid-color colorimetric background plate is arranged on the back plate; the bottom plate is provided with a colorimetric tube rack for placing colorimetric tubes, the colorimetric tube rack has a plurality of first placement holes, and the plurality of first placement holes are arranged along the length direction of the bottom plate; a camera bracket for placing a camera is arranged on one side of the colorimetric tube rack away from the back plate.
2. The colorimetric determination device according to claim 1, characterized in that, The bottom of the colorimetric tube rack is slidably connected to the bottom plate through a slide rail, and the slide rail is arranged along the length direction of the bottom plate.
3. The colorimetric determination device according to claim 2, characterized in that, The bottom plate is further provided with a sample tube rack, the sample tube rack includes a sample turntable, the sample turntable is provided with a plurality of second placement holes for placing sample tubes, the plurality of second placement holes are arranged along the circumference of the sample turntable, and the sample turntable is connected to the rotating shaft of the rotating motor through a crawler.
4. The colorimetric determination device according to claim 3, wherein At least one of the plurality of second placement holes is collinear with the plurality of first placement holes.
5. The colorimetric determination device according to claim 4, characterized in that, A sample tray concentrically arranged is provided below the sample turntable, the sample tray is connected to the central position of the sample turntable through a connecting shaft, and the sample tray can support the bottom of the sample tube.
6. The colorimetric determination device according to claim 5, characterized in that, The sample tube rack further includes a vertical rod rotatably connected to the bottom plate, the rotating motor is arranged at the top of the vertical rod, and the sample tray is fixedly connected to the vertical rod through a V-shaped connecting rod.
7. The colorimetric determination device according to claim 6, characterized in that, The colorimetric background plate has a white background plate, a black background plate and a blue background plate arranged in layers, and a reel is independently arranged at the top of the white background plate, the black background plate and the blue background plate, and they can be rolled up independently of each other; magnetic strips are arranged at the bottom for magnetic connection with the bottom plate.
8. The colorimetric determination device according to claim 7, characterized in that, The area of the right side regions of the white background plate, the black background plate and the blue background plate decreases in sequence.