44 results about "Colour difference" patented technology

The invention provides an intelligent paint make-up system capable of accurately identifying and matching the color of aged vehicle paint and a paint make-up method thereof, and the system comprises a color identification module which is used for extracting the color features of a to-be-repaired paint surface, thereby identifying the color of the to-be-repaired paint surface, and obtaining an image of the to-be-repaired paint surface; the data processing module is used for performing multi-angle spectral decomposition on the to-be-repaired paint surface image and predicting a paint surface fading curve so as to obtain a matching weight of color adjustment; the automatic paint mixing module comprises a precise proportioning pump unit and a multi-shaft stirring device and is used for mixing pigments according to the proportioning weight of color adjustment; and the closed-loop feedback module comprises a real-time chromatic aberration detection unit and is used for correcting errors of the pigments in real time and finally outputting the refinishing paint consistent with the spectral data of the paint surface to be repaired.

The invention discloses color difference detection equipment and process for production of high-wear-resistance regenerated polyester dyed cloth, and relates to the technical field of color difference detection equipment. Comprising a rack main body, a control main body is arranged at the front end of the rack main body, the rack main body is provided with a mounting mechanism for color difference detection for high-wear-resistance regenerated polyester dyed cloth production, and the mounting mechanism comprises a detection assembly and a control assembly, according to the invention, a red, green and blue three-primary-color narrow-band optical filter is adopted, and a second bevel gear and a worm connected with the second bevel gear are driven to rotate through meshing; the worm is meshed with a worm gear on the outer wall of the vertical shaft to drive the vertical shaft to rotate, and then the connecting rod drives the three sets of mounting frames to rotate synchronously, so that optical filter switching is achieved, the cloth cover chromatic aberration performance in different illumination environments can be simulated, the detection result is more accurate and comprehensive, the detection error caused by single illumination is reduced, and the detection efficiency is improved. And the comprehensiveness and the accuracy of chromatic aberration detection are improved.

This temperature-indicating label is provided with: a base material; an adhesive layer to be affixed to the surface of a living body; and a temperature-indicating ink layer that is positioned between the base material and the adhesive layer, and that is configured so as to change color in accordance with the temperature of the temperature-indicating ink layer. The stress at 20% stretching is 0.2 N / mm2 to 10.0 N / mm2. The thickness of the temperature-indicating ink layer is 1-9 µm. In a state in which the adhesive layer is affixed to a white plate, the color difference ΔE* ab in the L*a*b* color space between a first state in which the temperature-indicating ink layer exhibits a first color and a second state in which the temperature-indicating ink layer exhibits a second color different from the first color is greater than 10. The color change between the first color and the second color is visible via the base material.

The utility model discloses a temperature control color difference prevention plate stirrer for artificial stone plate production, which belongs to the technical field of artificial stone plate production equipment and comprises a water bath thermotank, a support, a material mixing tank, a stirring motor, a stirrer and a temperature regulation and control machine. The water bath constant-temperature box is communicated with the temperature regulation and control machine through a water circulation pipeline, the temperature regulation and control machine drives circulating water to flow in a circulation system formed by the water bath constant-temperature box, the water circulation pipeline and the temperature regulation and control machine through a water pump, and the circulating water is regulated and controlled to be in a constant-temperature state; a feeding pipe is arranged at the top of the mixing tank, and the stirring motor is arranged at the top of the feeding pipe and connected with the stirrer; and a discharge pipe is arranged at the bottom of the mixing tank. The temperature regulating and controlling machine is used for heating circulating water, the temperature in the material mixing tank can be effectively controlled within a preset range, and therefore color difference of plates is effectively prevented, the quality of the plates is ensured, particularly, the material mixing tank is arranged in the water bath constant temperature box, the material mixing tank is fully wrapped by water in the water bath constant temperature box, and the temperature control effect is better.

The utility model discloses an anti-settling water-based paint storage tank, belongs to the technical field of storage tanks, and solves the problems that water-based paint is stored in the storage tank for a long time or settles, so that obvious color difference of one barrel of paint is possibly caused by precipitation in finish paint, and the final coating effect is influenced. Comprising a tank body, a vertically-arranged vertical cylinder is arranged in the tank body, the outer ring of the vertical cylinder is communicated with a plurality of hard connecting cylinders located at all horizontal heights, and the hard connecting cylinders can be movably arranged relative to the vertical cylinder. Water-based paint is stored in the tank body through the feeding pipe, the valve is closed, and the water-based paint in the tank body is stirred up and down and is prevented from settling by intermittently supplying air to the air pump to enable air in the air pipe to flow, so that the soft connecting pipe expands to lift the hard connecting cylinder, the air pump stops flowing out of the air, the soft connecting pipe shrinks and the hard connecting cylinder falls. When discharging is needed, the outlet valve is opened, and the paint is discharged through the discharging pipe.

This invention discloses a PUR adhesive mixing process for edge banding, comprising: edge banding adhesive preparation, intelligent PUR adhesive dispensing machine system setting, high-precision color recognition sensor calibration, system setting confirmation, multi-system collaborative action construction, implementation of adhesive mixing ratio control, and adhesive application and edge banding detection. This invention integrates an edge banding machine adhesive application unit, a color recognition module, and an intelligent PUR adhesive dispensing machine system to jointly achieve the PUR adhesive mixing processing effect. It solves the problem of traditional single-color adhesive dispensing machines only supporting single adhesive output, and particularly addresses the issue of controlling the color difference between the adhesive line and the color of the edge banding board, meeting the processing requirements of gray and khaki colors, overcoming the problem of color difference control in edge banding of different colored boards, and creatively utilizing color mixing and adhesive mixing technology, greatly enriching the selectivity of edge banding processes.

This invention discloses a method for confirming color difference in coatings, comprising: circulating the paint to be tested in a paint pump for a first preset time; providing at least two sets of electrophoretic test plates, A and B, wherein set A includes at least three test plates A1, A2, and A3, and set B includes at least three test plates B1, B2, and B3; spraying A1, A2, A3, B1, B2, and B3 respectively; and baking A1, A2, A3, B1, B2, and B3 respectively in a topcoat baking oven. Film thickness tests were performed on A1, A2, and A3 to obtain the first film thickness parameters of the electrophoresis test plates in group A; color difference tests were performed on B1, B2, and B3 to obtain the first color difference variation parameters of the electrophoresis test plates in group B; based on the first film thickness parameters and the first color difference variation parameters, the first correspondence between the color difference and film thickness of the paint to be tested was calculated; based on the first correspondence, the first actual color difference parameters of the paint to be tested under the standard film thickness were calculated; and the first actual color difference parameters were compared with the range of the standard color difference parameters.

This invention discloses a gradient metering standard color masterbatch and its application method, belonging to the field of plastic color matching technology. Addressing the problems of poor dispersibility of traditional color masterbatches, difficulty in adapting customized color masterbatches to matching parts with color differences, and serious pollution from pigment processing, this invention first prepares micro-volume color masterbatches with a diameter and length ≤1mm, enabling uniform dispersion with a single color addition of 0.5% or more. It also establishes a gradient metering color masterbatch library, setting the pigment content in 500g of color masterbatch according to a geometric progression, achieving a micro-color adjustment capability of 0.01g / 100kg. During color matching, a color masterbatch of corresponding concentration is selected based on the target pigment usage. The addition amount is accurately calculated using the formula: weight = target usage / concentration × 500, allowing for the mixing of multiple color masterbatches. This invention combines the flexible fine-tuning capability of pigments with the cleanliness and stability of color masterbatches, completely eliminating pigment pollution, eliminating shear force interference, significantly improving color consistency between complex components, and adapting to intelligent manufacturing.

This utility model relates to a fabric inspection table, including a support, a worktable mounted on the support, a lamp body for detecting fabric color, a first roller to keep the fabric always in contact with the worktable, a take-up roller, an unwinding roller, a leveling component for leveling the fabric on the worktable, and an intermittent device for intermittently moving the fabric. The intermittent device is mounted on the support, and its active end is connected to the unwinding roller. The first roller is mounted on both sides of the worktable and is tangent to the top surface of the worktable. The leveling component moves along the worktable. The light source of the lamp body faces the worktable. The take-up roller and the unwinding roller are respectively mounted on both sides of the support. This invention solves the problem that fabric inspection often involves moving the fabric at a constant speed using two sets of rollers, detecting color differences during the fabric's movement. However, the movement of the fabric makes it difficult for workers to accurately capture the location of color differences, leading to inaccurate observations. Furthermore, the fabric needs to be marked with cut sections and leveled during movement.

Food contact materials with a color difference ΔE <20 from the L*a*b* coordinates to a color number starting with "1" of the RAL color chart according to the color model according to EN ISO 11664-4, as determined according to DIN 5033 (1979), based on compositions containing at least one polyester or polystyrene and a colorant consisting of at least one yellow methine dye or at least one yellow quinophthalone dye and at least one ethylene oxide-propylene oxide block copolymer with a central propylene oxide unit between two ethylene oxide units, a molar mass determined from the OH number to be determined according to DIN / ISO 4629, in the range of 5500 to 7500 g / mol, a mass fraction of ethylene oxide units in the range of 45 to 55 wt.% and a flocculation point to be determined according to EN 1890 method B in the range of 70°C to 85°C.

This invention relates to a method for color matching of architectural coatings based on particle swarm optimization (PSO) algorithm. The method includes the following steps: using a standard color swatch and a colorimeter, under the same light intensity, light angle, and sampling distance, calibrating the basic color of a display one by one; saving the architectural coating color designed using the calibrated display as a standard color and displaying the standard color on this display; adjusting to obtain multiple different standard colorant ratios; iteratively searching for the optimal standard colorant ratio using the PSO algorithm; and outputting the optimal standard colorant ratio. This invention eliminates the industry's reliance on manual experience in color matching, achieving controllable results for the final product without human intervention; making the experimental process highly directional, quickly obtaining satisfactory results with a small number of iterations and very few samples per iteration; achieving color matching results with much higher accuracy than manual color matching; and enabling large-scale application.

The utility model discloses a PET bottle sorting device which comprises a conveying mechanism, a detection mechanism and a sorting mechanism located on one side of the detection mechanism are arranged on the conveying mechanism, the conveying mechanism comprises a working table and a conveying belt running on the inner side of the working table, an extension plate is further fixed to the inner side of the working table, guide plates are arranged on the two sides of the extension plate, and the guide plates are arranged on the conveying mechanism. The detection mechanism comprises a colorimeter and a controller in coupling connection with the colorimeter, the colorimeter is located above the conveying belt and used for detecting the PET bottles conveyed on the conveying belt, detecting the PET bottles with specified colors and transmitting electric signals to the controller, and the colorimeter is fixed to the bridge plate. According to the PET bottle sorting device, the colorimeter is matched with the controller and the servo motor, after the colorimeter identifies the PET bottles with the specified colors, electric signals are transmitted to the controller in real time, the sorting isolation plate is driven to move to the specified position, the PET bottles with the specified colors are sorted and discharged, and automatic screening of the PET bottles is achieved.

This invention discloses a method for deriving a color registration control error model during steady-speed printing in a mechanical shaft gravure printing machine. Based on the mathematical model, the color registration control method of this invention employs a recursive iterative analysis method for control design. The control method of this invention not only theoretically ensures zero registration error, but also features fast response speed, effectively eliminates color differences throughout the system, and improves registration accuracy, making it highly suitable for widespread use in steady-speed printing processes on mechanical shaft gravure printing machines.

The utility model belongs to the field of mixing of color master batches and resin, and particularly relates to equipment for improving the dispersity of the color master batches in matrix resin, which comprises a machine body, and a heating and conveying mechanism is arranged at the bottom of the machine body; the heating and conveying mechanism comprises a water storage tank, the water storage tank is placed at the bottom of the machine body, two heaters are fixedly installed in the water storage tank, and the heating ends of the heaters extend to the inner wall of the water storage tank; by arranging the heating conveying mechanism, the machine body can be heated, and the situation that when the machine body is used in a low-temperature environment, due to the influence of the temperature, mixing of color master batch and a resin carrier is affected, and color difference occurs when the color master batch and resin are mixed can be avoided, so that the temperature of the machine body is increased, and the machine body is prevented from being affected by the low temperature; furthermore, color difference is avoided when the color master batch and the resin are mixed, and the aim of preventing the machine body from being influenced by temperature is achieved.

The utility model relates to a paint surface color difference detection device which comprises a movable assembly and a detection assembly, the movable assembly is used for bearing the detection assembly and transporting the detection assembly; the detection assembly is located at the tail end of the movable assembly and comprises a mounting frame, a colorimeter and a range finder; the mounting frame is used for bearing the colorimeter and the range finder and is connected with the movable assembly; the colorimeter is positioned in the center of the mounting frame and is used for detecting the paint surface of the sampling point; the range finder is positioned on the mounting frame and around the colorimeter and is used for detecting the position relationship between the sampling point and the colorimeter; firstly, as the movable assembly and the detection assembly are combined, the movable assembly is utilized to move the detection assembly to an approximate area of a sampling point, then the detection assembly is used for accurately positioning the sampling point, and then the detection assembly is driven to an accurate position according to accurate positioning information, so that the detection assembly is tightly attached to the sampling point; and rapid and accurate detection of the paint surface color difference is realized.

The application provides a multi-sensor fusion cloth online defect identification method and system, and relates to the technical field of cloth defect identification. The method comprises the following steps: acquiring specified graphs of the front and back surfaces of the current detection cloth; performing space-time alignment on the data in the specified graphs to obtain multi-source data after alignment; extracting key information from the multi-source data; determining the fusion weight of each data in the key information according to the cloth type parameter of the current detection cloth; performing weighted fusion on the data in the key information according to the fusion weight to generate a fusion feature vector; comparing the fusion feature vector with the fusion feature of normal cloth to determine and locate the color difference area. The method of the application aims at the cloth manufacturing production line and aims to solve the technical problem of color difference defect detection of cloth with double-sidedness, light transmission and after finishing process, and realizes more accurate identification and positioning of color difference defects of complex cloth.

The application discloses a kind of based on convolutional neural network's car paint effect pigment identification method, comprising the following steps: to several same specifications sheet metal's paint sample is carried out image acquisition, and the image according to the paint effect of this image sheet metal is ranked by grade;Based on convolutional neural network to the image of each grade ranking in the same specification sheet metal is extracted, and its specific steps of extraction are: after the image of each grade ranking in the same specification sheet metal is convolved with convolution kernel m1, to obtain the next layer more reaction car paint pigment chromatism convolution graph M1.The present application can automatically identify the paint effect of subsequent production of the same specification by paint effect judgment model, and since the identification method is anchored to the traditional paint effect evaluation, so that the same production line will not cause the problem of inconsistent paint display effect due to the abrupt change of evaluation method system.

To provide a composite sheet by which a wet state caused by urine leakage or the like can be determined visually and easily when used for clothing, sheet or the like.SOLUTION: A composite sheet 1 according to the present invention comprises a surface layer on which a covering sheet 3, which is made of a material capable of absorbing water and colored in a single color same as a display sheet 2 colored in a predetermined single color or an unbleached color on a front side of the display sheet 2, is laminated, where the color of the display sheet 2 is a dark color having the color difference ΔE of 11 or more for the color of the covering sheet 3 having the water absorption ratio 0%, and the surface layer is a dark color in which a color expressed in the region of water absorption ratio 80% or more has the color difference ΔE of 1.5 or more for a color expressed in the region of water absorption ratio 0%.SELECTED DRAWING: Figure 1

The invention discloses a color difference detection device for jig dyeing of new material cloth, and relates to the technical field of cloth detection. The color difference detection device for jig dyeing of the new material cloth comprises a color difference detection bin, a power rod driven by a linear motor is assembled in the color difference detection bin, a rotating disc driven by a servo motor is assembled at the bottom of the power rod, and an optical detection head is assembled in the rotating disc. And a dust extraction pipeline connected with an air pump is assembled at the top of the color difference detection bin. According to the color difference detection device for jig dyeing of the new material cloth, to-be-detected cloth is moved into the color difference detection bin through a corresponding conveying mechanism, a servo motor is driven, a power rod is driven to move downwards, and a pressing rod, a torsional spring block, a first stress rod, a connecting rod, a hinge rod, a sliding plate, a first elastic telescopic block, a first positioning plate and a rotating roller are matched; in this way, cloth possibly wrinkled can be straightened during chromatic aberration detection, and the detection precision of the device is improved.

The application discloses a method and system for color correction of printed textiles, which links multiple differences in the color correction process and only corrects the formula concentration, reduces errors and improves color correction accuracy. Different color correction formulas are used according to the difference between the actual dyeing sample and the standard color sample, and the application range is wider. The technical scheme comprises the following steps: 1) obtaining an initial formula based on the color data of the standard color sample; 2) dyeing a blank sample according to the initial formula to obtain an actual dyeing sample, measuring the color data and calculating the color difference value between the actual dyeing sample and the standard color sample; 3) comparing the actual dyeing sample color difference value with a threshold value, if not satisfied, obtaining a formula according to the color data of the actual dyeing sample and calculating a correction coefficient; 4) obtaining a color correction formula through the correction coefficient, dyeing a blank sample, obtaining an actual dyeing sample, measuring the color data and calculating the color difference value between the actual dyeing sample and the standard color sample; 5) repeating steps 3) to 4) until a color correction formula satisfying the color difference threshold value is obtained.

The invention discloses a PVD (Physical Vapor Deposition) coating analysis control method and a related device, which are used for stabilizing the chromatic aberration of a product. The method comprises the following steps: acquiring color difference values of a first preset number of heats before a current heat; obtaining a current reference point corresponding to the current heat according to the number of the heat within the color difference specification range in the color difference values of the first preset number of heat; if the current reference point is larger than the preset reference value, color layer data and interference layer data corresponding to the current heat are obtained; determining a recovery moment based on the color layer data and the interference layer data; and parameters of the current heat are adjusted according to the rising moment. In the embodiment of the invention, according to the association between the reference point and the recovery moment, the coating duration is intelligently regulated and controlled, the color difference of the product is accurately corrected, and the stability of the product quality is effectively improved; and the optimal process parameters are intelligently recommended according to the recovery moment, so that human intervention is greatly reduced, the color difference fluctuation is minimized, and the production efficiency and the intelligent management level are remarkably improved.

This invention belongs to the technical field of building material production equipment, specifically disclosing a color-difference-free soft stone production device and method. It includes a slurry funnel with a uniform spreading mechanism at its inner top for evenly discharging the slurry. A cleaning mechanism is located outside the uniform spreading mechanism to further even out the slurry. A dryer is located on one side of the slurry funnel. Conveyor belts are installed inside both the slurry funnel and the dryer. An impurity removal mechanism is located at the bottom of one of the conveyor belts for cleaning the conveyor belt below the slurry funnel. The uniform spreading mechanism ensures the slurry is evenly spread on the conveyor belt, preventing uneven thickness and color differences when the slurry enters the roller press. This improves the color uniformity during roller pressing and enhances the quality of the soft stone production.

The application provides a strong twist shuttle woven fabric printing and dyeing color difference detection device, which comprises a workbench, a first limiting assembly, a connecting column, a second limiting assembly and a color difference detection mechanism, a plurality of rollers are arranged in the workbench, the first limiting assembly is fixedly connected with the workbench through the connecting column, the first limiting assembly is detachably connected with the second limiting assembly, two sliding blocks are arranged on the first limiting assembly and the second limiting assembly, and the color difference detection mechanism is arranged on the side, away from the workbench, of the first limiting assembly. The color difference detection device is characterized in that the color sensor is arranged on the fixed-point color difference monitoring module and the movable color difference monitoring module, the fixed-point color difference monitoring module is fixed in the horizontal direction, and the movable color difference monitoring module slides in the horizontal direction, so that the fixed-point color difference monitoring module and the movable color difference monitoring module obtain data convenient for color and luster comparison, and the color and luster comparison efficiency and accuracy are improved.

The application discloses a cold-rolled steel plate surface color difference defect control method, and relates to the related field of cold-rolled steel plate processing.The cold-rolled steel plate surface color difference control method has the advantages that the online spectrum color difference detection is combined with the annealing furnace exhaust odor characteristic monitoring, the double-dimension judgment of the annealing process atmosphere state and the surface oxidation film change is realized, compared with the traditional mode of only relying on the color difference result for after-regulation, the method is more real-time and predictive, the system can identify the atmosphere abnormal trend in advance through the odor characteristic change before the color difference has obvious deviation, and the compensation adjustment of the hydrogen proportion, the dew point and the furnace temperature is automatically executed, so that the generation of the color difference defect is effectively prevented; when the color difference and the odor signal are synchronously abnormal, the system can also quickly respond and recover to the stable interval, the color difference control precision is greatly improved, the method can significantly improve the consistency of the steel plate surface brightness and color, improve the color difference qualified rate and reduce the product waste caused by the annealing abnormality.

The invention discloses a decorative paper color difference detection method and device based on spectral analysis, and belongs to the technical field of decorative paper detection. The invention discloses a spectral analysis-based decorative paper color difference detection method and device, and the device comprises an installation housing which is provided with through grooves at two ends; at least one colorimeter, wherein the number of the colorimeters is at least one; and the reciprocating driving assembly is mounted in the inner cavity of the mounting shell. According to the technical scheme, by arranging the reciprocating driving assembly, the colorimeter can keep dynamic synchronization with the moving decorative paper, so that the colorimeter and the measured area keep static relatively, the problems of measurement point offset and continuous incident light angle change caused by relative movement can be solved, chromatic aberration comparison has high consistency and reliability, and the measurement accuracy is improved. Therefore, a reliable basis can be provided for real-time quality monitoring and process adjustment in the production process.

The present application relates to the technical field of building coating, and provides a colored sand wall-like building coating, a preparation method thereof and an evaluation method of color matching difficulty, wherein the colored sand wall-like building coating comprises an acrylic polymer emulsion, hydroxyethyl cellulose, modified bentonite, natural colored sand, transparent color paste, an additive and water. The coating provided by the present application uses the acrylic polymer emulsion as a film-forming resin, completely wets the natural colored sand and fully disperses the natural colored sand in the whole coating system, so that the emulsion paint is more permeable, and the method of synergistic color matching of the natural colored sand and the transparent color paste is used, so that the color change of the product during the drying process of the coating after construction is small, the film-forming is not required to be completely dry, the color difference comparison and color adjustment can be performed with the standard color in the wet film state, the color matching time is shortened, and the production efficiency is improved.

The invention provides a heat vulcanization repair method for color difference on the surface of a light-color rubber product. The heat vulcanization repair method comprises the following steps: a) polishing, decontaminating and drying a target surface with color difference; b) preparing a repairing sheet by adopting an unvulcanized rubber compound which is consistent with the formula of the light-color rubber plate matrix, and enabling the repairing sheet to cover the color difference area and be matched with the color difference area in shape; c) respectively coating the surface of the color difference area and the to-be-laminated surface of the repairing sheet with a hot vulcanization adhesive, and airing until the surfaces are dry; d) the repairing sheet and the color difference area are aligned, attached and pre-compacted; e) carrying out heat vulcanization on the attached part under the pressurizing and heating conditions; through the same-formula unvulcanized repairing sheet and two pressurization heat vulcanization processes of mold pressing / air inflation, effective shielding of color difference on the surface of the light-color rubber plate and reliable bonding of an interface are achieved, appearance consistency and size keeping are both considered, and the method is suitable for repairing planar and curved-surface products.

The present application relates to the technical field of wellhead leakage identification, and is a wellhead chromatographic analysis and identification leakage device, wherein the former comprises a collection box, an internal color developing card, an external color developing card, a first collection module, a second collection module, a color difference acquisition module, a time acquisition module and an alarm module. The present application has a reasonable and compact structure. The first collection module collects the color at at least one position on the upper side of the internal color developing card in the collection box, the second collection module collects the color on the outer side of the collection box, the color difference acquisition module determines the first color difference maximum value and acquires the second color difference, the time acquisition module acquires the time length from when the first color difference maximum value is equal to the color difference setting value to when the second color difference is equal to the color difference setting value, and the alarm module analyzes the first color difference maximum value and the time length from when the first color difference maximum value is equal to the color difference setting value to when the second color difference is equal to the color difference setting value to obtain an alarm judgment result, and triggers the corresponding level of alarm according to the alarm judgment result.