Intelligent monitoring method for remanufactured ink cartridge printheads based on visual recognition

Abstract

The present invention provides an intelligent monitoring method for remanufactured ink cartridge nozzles based on visual recognition, which performs a comprehensive and careful inspection of the remanufactured ink cartridge nozzles by means of visual recognition analysis, can shorten the inspection time of a single remanufactured ink cartridge nozzle and improve the inspection accuracy, synchronously monitor the appearance and interior of the remanufactured ink cartridge nozzle, effectively improve the yield rate of the remanufactured ink cartridge nozzle production, and conduct targeted screening of unqualified remanufactured ink cartridge nozzles to ensure the quality reliability of the remanufactured ink cartridge nozzles.

Description

Technical Field

[0001] The present invention relates to the technical field of remanufactured ink cartridge nozzle detection, and in particular to an intelligent monitoring method for remanufactured ink cartridge nozzles based on visual recognition. Background Art

[0002] Remanufactured ink cartridge nozzles are important parts of printers. Whether the appearance and structure of remanufactured ink cartridge nozzles meet the preset standard requirements directly affects the compatibility with the printer, and determines the smoothness and continuity of inkjet of the remanufactured ink cartridge nozzles. The existing remanufacture of remanufactured ink cartridge nozzles is to inspect some remanufactured ink cartridge nozzles by sampling. Although the sampled remanufactured ink cartridge nozzles can be inspected in detail and comprehensively, all remanufactured ink cartridge nozzles cannot be inspected, and the yield rate of remanufactured ink cartridge nozzles cannot be effectively improved. It is also impossible to conduct targeted screening of unqualified remanufactured ink cartridge nozzles, which reduces the quality reliability of remanufactured ink cartridge nozzles. Summary of the invention

[0003] In view of the defects existing in the prior art, the present invention provides an intelligent monitoring method for remanufactured ink cartridge nozzles based on visual recognition, which images and analyzes the remanufactured ink cartridge nozzles to obtain the appearance feature information, structural feature information and liquid discharge dynamic feature information of the remanufactured ink cartridge nozzles, thereby judging whether the remanufactured ink cartridge nozzles meet the preset appearance conditions, preset structural conditions and preset liquid discharge conditions respectively; then constructs a comparison relationship table between the product identification code of the remanufactured ink cartridge nozzles and the judgment results of the preset appearance conditions, preset structural conditions and preset liquid discharge conditions, and distinguishes and screens the remanufactured ink cartridge nozzles according to the comparison relationship table, and performs a comprehensive and careful inspection of the remanufactured ink cartridge nozzles by visual recognition and analysis, which can shorten the inspection time of a single remanufactured ink cartridge nozzle and improve the inspection accuracy, and simultaneously monitors the appearance and interior of the remanufactured ink cartridge nozzles, effectively improves the yield rate of the remanufactured ink cartridge nozzles, and performs targeted screening on unqualified remanufactured ink cartridge nozzles to ensure the quality reliability of the remanufactured ink cartridge nozzles.

[0004] The present invention provides a method for intelligently monitoring a remanufactured ink cartridge nozzle based on visual recognition, which comprises the following steps:

[0005] Step S1, photographing the remanufactured ink cartridge nozzle to obtain a first nozzle image; analyzing and processing the first nozzle image to obtain shape feature information of the remanufactured ink cartridge nozzle; judging whether the remanufactured ink cartridge nozzle meets a preset shape condition according to the shape feature information;

[0006] Step S2, photographing the remanufactured ink cartridge nozzle for a second time to obtain a second nozzle image; analyzing and processing the second nozzle image to obtain structural feature information of the remanufactured ink cartridge nozzle; judging whether the remanufactured ink cartridge nozzle meets a preset structural condition according to the structural feature information;

[0007] Step S3, cleaning the remanufactured ink cartridge nozzle and photographing a corresponding cleaning process image; analyzing and processing the cleaning process image to obtain the liquid discharge dynamic characteristic information of the remanufactured ink cartridge nozzle; judging whether the remanufactured ink cartridge nozzle meets the preset liquid discharge condition according to the liquid discharge dynamic characteristic information;

[0008] Step S4, constructing a comparison relationship table between the product identification code of the remanufactured ink cartridge nozzle and the judgment results of the preset appearance condition, the preset structural condition and the preset liquid discharge condition through the server; and distinguishing and screening the remanufactured ink cartridge nozzle according to the comparison relationship table.

[0009] Further, in the step S1, photographing the remanufactured ink cartridge nozzle to obtain a first nozzle image; analyzing and processing the first nozzle image to obtain the appearance feature information of the remanufactured ink cartridge nozzle specifically includes:

[0010] Perform binocular photography on the remanufactured ink cartridge nozzle to obtain a binocular image of the remanufactured ink cartridge nozzle; obtain a three-dimensional image of the remanufactured ink cartridge nozzle according to the binocular parallax of the binocular image;

[0011] The three-dimensional image is analyzed and processed to obtain shape feature information and size feature information of the remanufactured ink cartridge nozzle, which is used as the appearance feature information.

[0012] Further, in the step S1, judging whether the remanufactured ink cartridge nozzle meets the preset shape condition according to the shape feature information specifically includes:

[0013] Extracting shape data of different parts and size data of different parts of the remanufactured ink cartridge nozzle from the shape feature information and the size feature information respectively;

[0014] Uploading the shape data of the different parts and the size data of the different parts to a server, and comparing the shape data of the different parts with preset standard shape data and comparing the size data of the different parts with preset standard size data through the server;

[0015] According to the above comparison results, it is determined whether the remanufactured ink cartridge nozzle meets the preset appearance conditions.

[0016] Further, in step S2, the remanufactured ink cartridge nozzle is photographed for a second time to obtain a second nozzle image; and the second nozzle image is analyzed and processed to obtain the structural feature information of the remanufactured ink cartridge nozzle, which specifically includes:

[0017] Scanning and photographing the remanufactured ink cartridge nozzle to obtain a panoramic surface image of the remanufactured ink cartridge nozzle;

[0018] Corresponding texture feature information is extracted from the panoramic surface image, and based on the texture feature information, crack existence status information and surface undulation status information of the remanufactured ink cartridge nozzle surface are determined as the structural feature information.

[0019] Further, in the step S2, judging whether the remanufactured ink cartridge nozzle meets the preset structural condition according to the structural feature information specifically includes:

[0020] Extracting crack quantity data, crack location data and crack average width data from the crack existence status information;

[0021] Extracting surface smoothness distribution data from the surface undulation state information, wherein the surface smoothness distribution data refers to the smoothness data of the surface of different areas of the remanufactured ink cartridge nozzle;

[0022] The data on the number of cracks, the data on the locations of cracks, the data on the average width of cracks and the data on the distribution of surface smoothness are uploaded to a server, and the data on the number of cracks, the data on the locations of cracks, the data on the average width of cracks and the data on the distribution of surface smoothness are analyzed and processed by the server to determine whether the remanufactured ink cartridge nozzle meets preset structural conditions.

[0023] Further, in step S3, the remanufactured ink cartridge nozzle is cleaned and a corresponding cleaning process image is captured; the cleaning process image is analyzed and processed to obtain the liquid discharge dynamic characteristic information of the remanufactured ink cartridge nozzle, which specifically includes:

[0024] During the cleaning process of the remanufactured ink cartridge nozzle, dynamically photographing the cleaning liquid ejection state of the nozzle of the remanufactured ink cartridge nozzle to obtain a corresponding cleaning process image;

[0025] Extracting a plurality of image frames including the state of the cleaning liquid ejected from the nozzle from the cleaning process image, and analyzing and processing each image frame to obtain the shape profile information of the liquid column formed after the cleaning liquid is ejected from the nozzle in each image frame;

[0026] According to the shape profile information corresponding to all the image frames, radial size change information of the liquid column formed after being ejected from the nozzle is obtained, which is used as the liquid discharge dynamic feature information.

[0027] Further, in the step S3, judging whether the remanufactured ink cartridge nozzle meets the preset liquid discharge condition according to the liquid discharge dynamic characteristic information specifically includes:

[0028] The radial dimension change information is uploaded to a server, and the radial dimension change information is analyzed and processed by the server to obtain the fluidity characteristic information of the remanufactured ink cartridge nozzle; wherein the fluidity characteristic information includes the fluid volume change information of the remanufactured ink cartridge nozzle per unit time;

[0029] And according to the liquid discharge smoothness characteristic information, it is determined whether the remanufactured ink cartridge nozzle meets the preset liquid discharge condition.

[0030] Further, in the step S4, a comparison relationship table between the product identification code of the remanufactured ink cartridge nozzle and the judgment results of the preset appearance condition, the preset structural condition and the preset liquid discharge condition is constructed by the server; and according to the comparison relationship table, the remanufactured ink cartridge nozzle is distinguished and screened, specifically including:

[0031] A comparison relationship table between the product identification code of the remanufactured ink cartridge nozzle and the judgment results of the preset appearance condition, the preset structural condition and the preset liquid discharge condition is constructed by the server; wherein the comparison relationship table contains a one-to-many correspondence relationship between the product identification code of the remanufactured ink cartridge nozzle and each of the above judgment results;

[0032] According to the comparison relationship table, it is determined whether the remanufactured ink cartridge nozzle head is a qualified remanufactured ink cartridge nozzle head or an unqualified remanufactured ink cartridge nozzle head, so as to distinguish and screen the remanufactured ink cartridge nozzle heads.

[0033] Further, in the steps S1-S4, the appearance feature information, the structural feature information, and the liquid discharge dynamic feature information are uploaded to the server, and before uploading the above information to the server, the information is firstly converted into binary data, and then the binary data is converted into hexadecimal data, and the identification data is inserted into the hexadecimal data, which specifically includes:

[0034] Step A1, using the following formula (1), based on the information to be uploaded, generate identification data matching the information to be uploaded, and based on the number of data bits of the information to be uploaded, obtain the data insertion point of the identification data matching the information to be uploaded,

[0035]

[0036] In the above formula (1), e indicates that the data insertion point of the identification data matched by the information to be uploaded is the e-th data of the information to be uploaded, that is, the identification data matched by the information to be uploaded is inserted after the e-th data of the information to be uploaded; D 16 Represents the hexadecimal form of the identification data to be matched by the information to be uploaded; G 16 Represents the hexadecimal form of the information to be uploaded; (G 16 ) Z Indicates that the data G 16 Perform an inversion; Indicates XOR; len() indicates the number of bits in the brackets; G 16 (1) represents data G 16 The first digit of G 16 (a) represents data G 16 The a-th digit value of ; F[] represents the judgment function. If the formula in the brackets is true, the function value of the judgment function is 1. If the formula in the brackets is not true, the function value of the judgment function is 0. Indicates rounding down;

[0037] Step A2, using the following formula (2), according to the identification data matched by the information to be uploaded and its corresponding data insertion point, insert the identification data into the information to be uploaded,

[0038]

[0039] In the above formula (2), H 16 Indicates the uploaded data formed after the identification data matching the information to be uploaded is inserted into the information to be uploaded, and the data format is hexadecimal data; G 16 [1→len(G 16 )] indicates that the data G 16 From the 1st to the lenth (G 16 ) bits are extracted; {,},{,,} all mean merging the data at both ends of the comma in the brackets into new hexadecimal data; G 16 (1→e) means that the data G 16 Extract the first to the eth bit in G 16 [e+1→len(G 16 )] indicates that the data G 16 From the e+1th to the len(G 16 ) bits are extracted;

[0040] Step A3: After receiving the uploaded information, the server uses the following formula (3) to perform data verification and extract original data on the received information.

[0041]

[0042] In the above formula (3), Y 16 represents the original data extracted; J represents the data verification value, if J = 1, it means the data verification is successful, if J = 0, it means the data verification fails; h 16 (k) represents data h 16 The k-th value of the identification data; E represents the extraction location value of the identification data; h 16 (1→E) means that the data h 16 Extract the 1st to Eth bits in ; Indicates that the data h 16 The bit to len(h 16 ) bit is extracted; h 16 [E+1→E+len(h 16 )] means to convert data h 16 From the E+1th to the E+lenth (h 16 ) bits are extracted;

[0043] And, only when J=1, the original data Y extracted 16 Otherwise, the extracted original data is invalid and needs to be discarded.

[0044] Compared with the prior art, the intelligent monitoring method for remanufactured ink cartridge nozzles based on visual recognition captures and analyzes images of the remanufactured ink cartridge nozzles to obtain the appearance feature information, structural feature information and liquid discharge dynamic feature information of the remanufactured ink cartridge nozzles, thereby judging whether the remanufactured ink cartridge nozzles meet the preset appearance conditions, preset structural conditions and preset liquid discharge conditions respectively; then a comparison relationship table between the product identification code of the remanufactured ink cartridge nozzles and the judgment results of the preset appearance conditions, preset structural conditions and preset liquid discharge conditions is constructed, and the remanufactured ink cartridge nozzles are distinguished and screened according to the comparison relationship table. The remanufactured ink cartridge nozzles are comprehensively and carefully inspected by visual recognition analysis, which can shorten the inspection time of a single remanufactured ink cartridge nozzle and improve the inspection accuracy, and the appearance and interior of the remanufactured ink cartridge nozzles are monitored synchronously, which effectively improves the yield rate of the remanufactured ink cartridge nozzle production, and unqualified remanufactured ink cartridge nozzles are screened in a targeted manner to ensure the quality reliability of the remanufactured ink cartridge nozzles.

[0045] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0046] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 A schematic flow chart of the intelligent monitoring method for remanufactured ink cartridge nozzles based on visual recognition provided by the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] See also Figure 1 , is a flow chart of a method for intelligently monitoring a remanufactured ink cartridge nozzle based on visual recognition provided by an embodiment of the present invention. The method for intelligently monitoring a remanufactured ink cartridge nozzle based on visual recognition comprises the following steps:

[0051] Step S1, photographing the remanufactured ink cartridge nozzle to obtain a first nozzle image; analyzing and processing the first nozzle image to obtain the appearance feature information of the remanufactured ink cartridge nozzle; judging whether the remanufactured ink cartridge nozzle meets the preset appearance condition according to the appearance feature information; wherein the remanufactured ink cartridge nozzle refers to obtaining a corresponding ink cartridge nozzle from the recycled ink cartridge after recycling the used ink cartridge, and then cleaning and refurbishing the ink cartridge nozzle to obtain the remanufactured ink cartridge;

[0052] Step S2, photographing the remanufactured ink cartridge nozzle for a second time to obtain a second nozzle image; analyzing and processing the second nozzle image to obtain structural feature information of the remanufactured ink cartridge nozzle; and judging whether the remanufactured ink cartridge nozzle meets a preset structural condition according to the structural feature information;

[0053] Step S3, cleaning the remanufactured ink cartridge nozzle and photographing a corresponding cleaning process image; analyzing and processing the cleaning process image to obtain the liquid discharge dynamic characteristic information of the remanufactured ink cartridge nozzle; judging whether the remanufactured ink cartridge nozzle meets the preset liquid discharge condition according to the liquid discharge dynamic characteristic information;

[0054] Step S4, constructing a comparison table between the product identification code of the remanufactured ink cartridge nozzle and the judgment results of the preset appearance condition, the preset structural condition and the preset liquid discharge condition through the server; and distinguishing and screening the remanufactured ink cartridge nozzle according to the comparison table.

[0055] The beneficial effects of the above technical solution are as follows: the intelligent monitoring method for remanufactured ink cartridge nozzles based on visual recognition takes images and analyzes the remanufactured ink cartridge nozzles to obtain the appearance feature information, structural feature information and liquid discharge dynamic feature information of the remanufactured ink cartridge nozzles, thereby judging whether the remanufactured ink cartridge nozzles meet the preset appearance conditions, preset structural conditions and preset liquid discharge conditions respectively; then a comparison relationship table between the product identification code of the remanufactured ink cartridge nozzles and the judgment results of the preset appearance conditions, preset structural conditions and preset liquid discharge conditions is constructed, and the remanufactured ink cartridge nozzles are distinguished and screened according to the comparison relationship table, and the remanufactured ink cartridge nozzles are comprehensively and carefully inspected by visual recognition analysis, which can shorten the inspection time of a single remanufactured ink cartridge nozzle and improve the inspection accuracy, and simultaneously monitor the appearance and interior of the remanufactured ink cartridge nozzles, effectively improve the yield rate of the remanufactured ink cartridge nozzle production, and conduct targeted screening of unqualified remanufactured ink cartridge nozzles to ensure the quality reliability of the remanufactured ink cartridge nozzles.

[0056] Preferably, in step S1, photographing the remanufactured ink cartridge nozzle to obtain a first nozzle image; analyzing and processing the first nozzle image to obtain the appearance feature information of the remanufactured ink cartridge nozzle specifically includes:

[0057] Perform binocular photography on the remanufactured ink cartridge nozzle to obtain a binocular image of the remanufactured ink cartridge nozzle; obtain a three-dimensional image of the remanufactured ink cartridge nozzle according to the binocular parallax of the binocular image;

[0058] The three-dimensional image is analyzed and processed to obtain shape feature information and size feature information of the remanufactured ink cartridge nozzle, which are used as the appearance feature information.

[0059] The beneficial effect of the above technical solution is: by taking binocular photos of the remanufactured ink cartridge nozzle, a three-dimensional image of the remanufactured ink cartridge nozzle can be obtained, and the three-dimensional image can truly reflect the overall appearance characteristics of the remanufactured ink cartridge nozzle, so as to provide reliable data basis for subsequent judgment on whether the appearance of the remanufactured ink cartridge nozzle meets the preset appearance conditions.

[0060] Preferably, in step S1, judging whether the remanufactured ink cartridge nozzle meets the preset shape condition according to the shape feature information specifically includes:

[0061] Extracting shape data of different parts and size data of different parts of the remanufactured ink cartridge nozzle from the shape feature information and the size feature information respectively;

[0062] Uploading the shape data of the different parts and the size data of the different parts to a server, and comparing the shape data of the different parts with preset standard shape data, and comparing the size data of the different parts with preset standard size data through the server;

[0063] Based on the above comparison results, it is determined whether the remanufactured ink cartridge nozzle meets the preset appearance conditions.

[0064] The beneficial effect of the above technical solution is: the shape feature information and the size feature information are refined and distinguished into shape data and size data about different parts of the remanufactured ink cartridge nozzle, so that the remanufactured ink cartridge nozzle can be compared in a zoned manner. Specifically, the preset standard shape data may include standard shape data and standard size value ranges for different parts of the ink cartridge nozzle (such as the length, width, diameter and angle ranges of different parts), and the shape data of different parts are compared with the preset standard shape data, and the size data of different parts are compared with the preset standard size data. When the shape data of all parts match the preset standard shape data, and the size data of all parts are within the preset standard size data range, it is judged that the remanufactured ink cartridge nozzle meets the preset shape conditions; otherwise, the remanufactured ink cartridge nozzle does not meet the preset shape conditions, thereby making a standardized judgment on the shape state of the remanufactured ink cartridge nozzle.

[0065] Preferably, in step S2, the remanufactured ink cartridge nozzle is photographed twice to obtain a second nozzle image; and the second nozzle image is analyzed and processed to obtain the structural feature information of the remanufactured ink cartridge nozzle, which specifically includes:

[0066] Scanning and photographing the remanufactured ink cartridge nozzle to obtain a panoramic surface image of the remanufactured ink cartridge nozzle;

[0067] Corresponding texture feature information is extracted from the panoramic surface image, and based on the texture feature information, crack existence state information and surface undulation state information on the surface of the remanufactured ink cartridge nozzle are determined as the structural feature information.

[0068] The beneficial effect of the above technical solution is: by scanning and photographing the remanufactured ink cartridge nozzle, a panoramic surface image of the remanufactured ink cartridge nozzle can be obtained, and the panoramic surface image can truly reflect the overall surface morphological characteristics of the remanufactured ink cartridge nozzle, which is convenient for providing reliable data basis for subsequent judgment whether the surface of the ink cartridge spray meets the preset structural conditions.

[0069] Preferably, in step S2, judging whether the remanufactured ink cartridge nozzle meets the preset structural condition according to the structural feature information specifically includes:

[0070] Extracting crack quantity data, crack location data and crack average width data from the crack existence status information;

[0071] Extracting surface smoothness distribution data from the surface undulation state information, the surface smoothness distribution data refers to the smoothness data of the surface of different areas of the remanufactured ink cartridge nozzle;

[0072] The data on the number of cracks, the data on the locations of the cracks, the data on the average width of the cracks and the data on the surface smoothness distribution are uploaded to a server, and the data on the number of cracks, the data on the locations of the cracks, the data on the average width of the cracks and the surface smoothness distribution are analyzed and processed by the server to determine whether the remanufactured ink cartridge nozzle meets the preset structural conditions.

[0073] The beneficial effects of the above technical solution are: based on the data on the number of cracks, the data on the location of cracks, the data on the average width of cracks and the data on the surface smoothness distribution, it is possible to accurately judge whether there are a large number of cracks and uneven defects on the surface of the remanufactured ink cartridge nozzle; specifically, if the number of cracks is greater than or equal to the preset number threshold, or the location of the cracks is located at the preset position of the remanufactured ink cartridge nozzle, or the average width of the cracks is greater than or equal to the preset width threshold, or the surface roughness is greater than or equal to the preset roughness threshold, then it is judged that the remanufactured ink cartridge nozzle does not meet the preset structural conditions; otherwise, it is judged that the remanufactured ink cartridge nozzle meets the preset structural conditions, thereby making a standardized judgment on the surface morphology of the remanufactured ink cartridge nozzle.

[0074] Preferably, in step S3, the remanufactured ink cartridge nozzle is cleaned and a corresponding cleaning process image is captured; and the cleaning process image is analyzed and processed to obtain the liquid discharge dynamic characteristic information of the remanufactured ink cartridge nozzle, which specifically includes:

[0075] During the cleaning process of the remanufactured ink cartridge nozzle, a cleaning liquid ejection state of the nozzle of the remanufactured ink cartridge nozzle is dynamically photographed to obtain a corresponding cleaning process image;

[0076] Extracting a plurality of image frames including the state of the cleaning liquid ejected from the nozzle from the cleaning process image, and analyzing and processing each image frame to obtain the shape profile information of the liquid column formed after the cleaning liquid is ejected from the nozzle in each image frame;

[0077] According to the outline information corresponding to all the image frames, the radial size change information of the liquid column formed after being ejected from the nozzle is obtained, which is used as the dynamic characteristic information of the liquid ejection.

[0078] The beneficial effect of the above technical solution is: when the nozzle of the remanufactured ink cartridge nozzle is clogged, during the cleaning process of the remanufactured ink cartridge nozzle, when water or other cleaning liquid is ejected from the nozzle, the corresponding liquid column formed by the ejection will be small in size and intermittent, and each image frame is analyzed and processed to obtain the outer contour information of the liquid column formed after the cleaning liquid is ejected from the nozzle in each image frame, and then obtain the radial size change information of the liquid column formed after being ejected from the nozzle, so as to facilitate the subsequent accurate determination of whether the nozzle is clogged.

[0079] Preferably, in step S3, judging whether the remanufactured ink cartridge nozzle meets the preset liquid discharge condition according to the liquid discharge dynamic characteristic information specifically includes:

[0080] The radial dimension change information is uploaded to a server, and the radial dimension change information is analyzed and processed by the server to obtain the fluidity characteristic information of the remanufactured ink cartridge nozzle; wherein the fluidity characteristic information includes the fluid volume change information of the remanufactured ink cartridge nozzle per unit time;

[0081] And according to the liquid discharge smoothness characteristic information, it is determined whether the remanufactured ink cartridge nozzle meets the preset liquid discharge conditions.

[0082] The beneficial effect of the above technical solution is: through the above method, taking the liquid output volume change information of the remanufactured ink cartridge nozzle within unit time as a reference, if the liquid output volume change rate corresponding to the liquid output volume change information of the remanufactured ink cartridge nozzle within unit time is less than the preset change rate threshold, then it is judged that the remanufactured ink cartridge nozzle meets the preset liquid output condition (that is, the nozzle of the remanufactured ink cartridge nozzle is not clogged); otherwise, it is judged that the remanufactured ink cartridge nozzle does not meet the preset liquid output condition (that is, the nozzle of the remanufactured ink cartridge nozzle is clogged).

[0083] Preferably, in step S4, a comparison table between the product identification code of the remanufactured ink cartridge nozzle and the judgment result of the preset appearance condition, the preset structural condition and the preset liquid discharge condition is constructed by the server; and according to the comparison table, the remanufactured ink cartridge nozzle is distinguished and screened, specifically including:

[0084] A comparison relationship table between the product identification code of the remanufactured ink cartridge nozzle and the judgment results of the preset appearance condition, the preset structural condition and the preset liquid discharge condition is constructed by the server; wherein the comparison relationship table contains a one-to-many correspondence relationship between the product identification code of the remanufactured ink cartridge nozzle and each of the above judgment results;

[0085] According to the comparison relationship table, it is determined whether the remanufactured ink cartridge nozzle head is a qualified remanufactured ink cartridge nozzle head or an unqualified remanufactured ink cartridge nozzle head, so as to distinguish and screen the remanufactured ink cartridge nozzle heads.

[0086] The beneficial effect of the above technical solution is: through the above method, a comparison relationship table is constructed between the product identification code of the remanufactured ink cartridge nozzle and the judgment results of the preset appearance conditions, preset structural conditions and preset liquid outlet conditions, so that qualified remanufactured ink cartridge nozzles and unqualified remanufactured ink cartridge nozzles can be quickly and accurately screened out by looking up the comparison relationship table; specifically, when a certain remanufactured ink cartridge nozzle meets the preset appearance conditions, preset structural conditions and preset liquid outlet conditions, it is determined that the remanufactured ink cartridge nozzle is a qualified remanufactured ink cartridge nozzle; otherwise, it is determined that the remanufactured ink cartridge nozzle is not a qualified remanufactured ink cartridge nozzle, thereby improving the screening efficiency and reliability of the remanufactured ink cartridge nozzles.

[0087] Preferably, in the steps S1-S4, the appearance feature information, the structural feature information, and the liquid discharge dynamic feature information are uploaded to the server. Before uploading the above information to the server, the information is firstly converted into binary data, and then the binary data is converted into hexadecimal data, and the identification data is inserted into the hexadecimal data, which specifically includes:

[0088] Step A1, using the following formula (1), based on the information to be uploaded, generate identification data matching the information to be uploaded, and based on the number of data bits of the information to be uploaded, obtain the data insertion point of the identification data matching the information to be uploaded,

[0089]

[0090] In the above formula (1), e indicates that the data insertion point of the identification data matched by the information to be uploaded is the e-th data of the information to be uploaded, that is, the identification data matched by the information to be uploaded is inserted after the e-th data of the information to be uploaded; D 16 Indicates the hexadecimal form of the identification data that the information to be uploaded matches; G 16 Indicates the hexadecimal format of the information to be uploaded; (G 16 ) Z Indicates that the data G 16 Perform an inversion; Indicates XOR; len() indicates the number of bits in the brackets; G 16 (1) represents data G 16 The first digit of G 16 (a) represents data G 16 The a-th digit value of ; F[] represents the judgment function. If the formula in the brackets is true, the function value of the judgment function is 1. If the formula in the brackets is not true, the function value of the judgment function is 0. Indicates rounding down;

[0091] Step A2, using the following formula (2), according to the identification data matched by the information to be uploaded and its corresponding data insertion point, insert the identification data into the information to be uploaded,

[0092]

[0093] In the above formula (2), H 16 Indicates the upload data formed after the identification data matching the information to be uploaded is inserted into the information to be uploaded, and its data format is hexadecimal data; G 16 [1→len(G 16 )] indicates that the data G 16 From the 1st to the lenth (G 16 ) bits are extracted; {,},{,,} all mean merging the data at both ends of the comma in the brackets into new hexadecimal data; G 16 (1→e) means that the data G 16 Extract the first to the eth bit in G 16 [e+1→len(G 16 )] indicates that the data G 16 From the e+1th to the len(G 16 ) bits are extracted;

[0094] Step A3: After receiving the uploaded information, the server uses the following formula (3) to perform data verification and extract original data from the received information.

[0095]

[0096] In the above formula (3), Y 16 represents the original data extracted; J represents the data verification value, if J = 1, it means the data verification is successful, if J = 0, it means the data verification fails; h 16 (k) represents data h 16 The k-th value of the identification data; E represents the extraction location value of the identification data; h 16 (1→E) means that the data h 16 Extract the 1st to Eth bits in ; Indicates that the data h 16 The bit to len(h 16 ) bit is extracted; h 16 [E+1→E+len(h 16 )] means to convert data h 16 From the E+1th to the E+lenth (h 16 ) bits are extracted;

[0097] And, only when J=1, the original data Y extracted 16 Otherwise, the extracted original data is invalid and needs to be discarded.

[0098] The beneficial effects of the above technical solution are as follows: using the above formula (1), according to the information to be uploaded, the identification data matching the information to be uploaded is generated, and according to the number of data bits of the information to be uploaded, the data insertion point of the identification data matching the information to be uploaded is obtained, so that the exclusive identification data is inserted into it by a special calculation method to ensure the reliability of data encryption; then using the above formula (2), according to the identification data matching the information to be uploaded and its corresponding data insertion point, the identification data is inserted into the information to be uploaded, so that the data is automatically and intelligently inserted to ensure the automation of the system; finally, using the above formula (3), the received information is subjected to data verification and original data extraction, so as to ensure the accuracy and security of the data.

[0099] It can be seen from the contents of the above embodiments that the intelligent monitoring method for remanufactured ink cartridge nozzles based on visual recognition performs image capture and analysis on the remanufactured ink cartridge nozzles to obtain the appearance feature information, structural feature information and liquid discharge dynamic feature information of the remanufactured ink cartridge nozzles, thereby judging whether the remanufactured ink cartridge nozzles meet the preset appearance conditions, preset structural conditions and preset liquid discharge conditions respectively; then a comparison relationship table between the product identification code of the remanufactured ink cartridge nozzles and the judgment results of the preset appearance conditions, preset structural conditions and preset liquid discharge conditions is constructed, and the remanufactured ink cartridge nozzles are distinguished and screened according to the comparison relationship table. The remanufactured ink cartridge nozzles are comprehensively and carefully inspected by visual recognition analysis, which can shorten the inspection time of a single remanufactured ink cartridge nozzle and improve the inspection accuracy, and the appearance and interior of the remanufactured ink cartridge nozzles are synchronously monitored, effectively improving the yield rate of the remanufactured ink cartridge nozzle production, and the unqualified remanufactured ink cartridge nozzles are screened in a targeted manner to ensure the quality reliability of the remanufactured ink cartridge nozzles.

[0100] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An intelligent monitoring method for remanufactured ink cartridge nozzles based on visual recognition, characterized in that: It includes the following steps: Step S1, photographing the nozzle of the remanufactured ink cartridge to obtain a first nozzle image; analyzing and processing the first nozzle image to obtain appearance feature information of the nozzle of the remanufactured ink cartridge; According to the appearance feature information, judging whether the remanufactured ink cartridge nozzle meets the preset appearance condition; Step S2, photographing the remanufactured ink cartridge nozzle for a second time to obtain a second nozzle image; analyzing and processing the second nozzle image to obtain structural feature information of the remanufactured ink cartridge nozzle; judging whether the remanufactured ink cartridge nozzle meets a preset structural condition according to the structural feature information; Step S3, cleaning the nozzle of the remanufactured ink cartridge and photographing the corresponding cleaning process image; analyzing and processing the cleaning process image to obtain the liquid discharge dynamic characteristic information of the nozzle of the remanufactured ink cartridge; According to the liquid discharge dynamic characteristic information, determining whether the remanufactured ink cartridge nozzle meets the preset liquid discharge condition; Step S4, constructing a comparison table between the product identification code of the remanufactured ink cartridge nozzle and the judgment results of the preset appearance condition, the preset structural condition and the preset liquid discharge condition through the server; and distinguishing and screening the remanufactured ink cartridge nozzle according to the comparison table; Wherein, in the step S3, the remanufactured ink cartridge nozzle is cleaned and a corresponding cleaning process image is captured; the cleaning process image is analyzed and processed to obtain the liquid discharge dynamic characteristic information of the remanufactured ink cartridge nozzle, which specifically includes: During the cleaning process of the remanufactured ink cartridge nozzle, dynamically photographing the cleaning liquid ejection state of the nozzle of the remanufactured ink cartridge nozzle to obtain a corresponding cleaning process image; Extracting a plurality of image frames including the state of the cleaning liquid ejected from the nozzle from the cleaning process image, and analyzing and processing each image frame to obtain the shape profile information of the liquid column formed after the cleaning liquid is ejected from the nozzle in each image frame; According to the shape profile information corresponding to all the image frames, radial size change information of the liquid column formed after being ejected from the nozzle is obtained, which is used as the liquid discharge dynamic feature information.

2. The method for intelligent monitoring of remanufactured ink cartridge nozzles based on visual recognition as claimed in claim 1, characterized in that: In the step S1, photographing the remanufactured ink cartridge nozzle to obtain a first nozzle image; analyzing and processing the first nozzle image to obtain the appearance feature information of the remanufactured ink cartridge nozzle specifically includes: Perform binocular photography on the remanufactured ink cartridge nozzle to obtain a binocular image of the remanufactured ink cartridge nozzle; obtain a three-dimensional image of the remanufactured ink cartridge nozzle according to the binocular parallax of the binocular image; The three-dimensional image is analyzed and processed to obtain shape feature information and size feature information of the remanufactured ink cartridge nozzle, which is used as the appearance feature information.

3. The method for intelligent monitoring of remanufactured ink cartridge nozzles based on visual recognition as claimed in claim 2, characterized in that: In the step S1, judging whether the remanufactured ink cartridge nozzle meets the preset shape condition according to the shape feature information specifically includes: Extracting shape data of different parts and size data of different parts of the remanufactured ink cartridge nozzle from the shape feature information and the size feature information respectively; Uploading the shape data of the different parts and the size data of the different parts to a server, and comparing the shape data of the different parts with preset standard shape data and comparing the size data of the different parts with preset standard size data through the server; According to the above comparison results, it is determined whether the remanufactured ink cartridge nozzle meets the preset appearance conditions.

4. The method for intelligent monitoring of remanufactured ink cartridge nozzles based on visual recognition as claimed in claim 3, characterized in that: In the step S2, the remanufactured ink cartridge nozzle is photographed twice to obtain a second nozzle image; the second nozzle image is analyzed and processed to obtain the structural feature information of the remanufactured ink cartridge nozzle, which specifically includes: Scanning and photographing the remanufactured ink cartridge nozzle to obtain a panoramic surface image of the remanufactured ink cartridge nozzle; Corresponding texture feature information is extracted from the panoramic surface image, and based on the texture feature information, crack existence status information and surface undulation status information of the remanufactured ink cartridge nozzle surface are determined as the structural feature information.

5. The method for intelligent monitoring of remanufactured ink cartridge nozzles based on visual recognition as claimed in claim 4, characterized in that: In the step S2, judging whether the remanufactured ink cartridge nozzle meets the preset structural condition according to the structural feature information specifically includes: Extracting crack quantity data, crack location data and crack average width data from the crack existence status information; Surface smoothness distribution data is extracted from the surface undulation state information, and the surface smoothness distribution data refers to the smoothness data of the surface of different areas of the remanufactured ink cartridge nozzle; the crack quantity data, the crack location data, the crack average width data and the surface smoothness distribution data are uploaded to a server, and the crack quantity data, the crack location data, the crack average width data and the surface smoothness distribution data are analyzed and processed by the server to determine whether the remanufactured ink cartridge nozzle meets the preset structural conditions.

6. The method for intelligent monitoring of remanufactured ink cartridge nozzles based on visual recognition as claimed in claim 5, characterized in that: In the step S3, judging whether the remanufactured ink cartridge nozzle meets the preset liquid discharge condition according to the liquid discharge dynamic characteristic information specifically includes: The radial dimension change information is uploaded to a server, and the radial dimension change information is analyzed and processed by the server to obtain the fluidity characteristic information of the remanufactured ink cartridge nozzle; wherein the fluidity characteristic information includes the fluid volume change information of the remanufactured ink cartridge nozzle per unit time; And according to the liquid discharge smoothness characteristic information, it is determined whether the remanufactured ink cartridge nozzle meets the preset liquid discharge condition.

7. The method for intelligent monitoring of remanufactured ink cartridge nozzles based on visual recognition as claimed in claim 6, characterized in that: In the step S4, a comparison relationship table between the product identification code of the remanufactured ink cartridge nozzle and the judgment results of the preset shape condition, the preset structure condition and the preset liquid discharge condition is constructed by the server; According to the comparison table, the remanufactured ink cartridge nozzles are differentiated and screened, specifically including: A comparison relationship table between the product identification code of the remanufactured ink cartridge nozzle and the judgment results of the preset appearance condition, the preset structural condition and the preset liquid discharge condition is constructed by the server; wherein the comparison relationship table contains a one-to-many correspondence relationship between the product identification code of the remanufactured ink cartridge nozzle and each of the above judgment results; According to the comparison relationship table, it is determined whether the remanufactured ink cartridge nozzle head is a qualified remanufactured ink cartridge nozzle head or an unqualified remanufactured ink cartridge nozzle head, so as to distinguish and screen the remanufactured ink cartridge nozzle heads.

8. The method for intelligent monitoring of remanufactured ink cartridge nozzles based on visual recognition as claimed in claim 1, characterized in that: In the steps S1-S4, the appearance feature information, the structural feature information, and the liquid discharge dynamic feature information are uploaded to the server. Before uploading the above information to the server, the information is first converted into binary data, and then the binary data is converted into hexadecimal data, and the identification data is inserted into the hexadecimal data, which specifically includes: Step A1, using the following formula (1), based on the information to be uploaded, generate identification data matching the information to be uploaded, and based on the number of data bits of the information to be uploaded, obtain the data insertion point of the identification data matching the information to be uploaded, In the above formula (1), e indicates that the data insertion point of the identification data matched by the information to be uploaded is the e-th data of the information to be uploaded, that is, the identification data matched by the information to be uploaded is inserted after the e-th data of the information to be uploaded; D 16 Represents the hexadecimal form of the identification data to be matched by the information to be uploaded; G 16 Represents the hexadecimal form of the information to be uploaded; (G 16 ) z Indicates that the data G 16 Perform an inversion; Indicates XOR; len() indicates the number of bits in the brackets; G 16 (1) represents data G 16 The first digit of G 16 (a) represents data G 16 The a-th digit value of ; F[] represents the judgment function. If the formula in the brackets is true, the function value of the judgment function is 1. If the formula in the brackets is not true, the function value of the judgment function is 0. Indicates rounding down; Step A2, using the following formula (2), according to the identification data matched by the information to be uploaded and its corresponding data insertion point, insert the identification data into the information to be uploaded, In the above formula (2), H 16 Indicates the uploaded data formed after the identification data matching the information to be uploaded is inserted into the information to be uploaded, and the data format is hexadecimal data; G 16 [1→len(G 16 )] indicates that the data G 16 From the 1st to the lenth (G 16 ) bits are extracted; {,},{,,} all mean merging the data at both ends of the comma in the brackets into new hexadecimal data; G 16 (1→e) means that the data G 16 Extract the first to the eth bit in G 16 [e+1→len(G 16 )] indicates that the data G 16 From the e+1th to the len(G 16 ) bits are extracted; Step A3: After receiving the uploaded information, the server uses the following formula (3) to perform data verification and extract original data on the received information. In the above formula (3), Y 16 represents the original data extracted; J represents the data verification value, if J=1, it means the data verification is successful, if J=0, it means the data verification fails; h 16 (k) represents data h 16 The k-th value of the identification data; E represents the extraction location value of the identification data; h 16 (1→E) means that the data h 16 Extract the 1st to Eth bits in ; Indicates that the data h 16 The To len(h 16 ) bit is extracted; h 16 [E+1→E+len(h 16 )] means to convert data h 16 From the E+1th to the E+lenth (h 16 ) bits are extracted; And, only when J=1, the original data Y extracted 16 Otherwise, the extracted original data is invalid and needs to be discarded.

Images