Explosion-proof flexible connecting pipe processing device and method

Abstract

The present invention relates to the technical field of explosion-proof flexible connecting pipe processing, and specifically to an explosion-proof flexible connecting pipe processing device and method. The method first constructs a pressure tree corresponding to the crimping pressure of a tube crimping machine during the processing of explosion-proof flexible connecting pipes and a fit tree corresponding to the crimping fit; performs path matching on the fit tree and the pressure tree to obtain the overall difference between the fit tree and the pressure tree; screens out the target crimping fit, and determines the local error proportion of each target crimping fit; based on the overall difference and the local error proportion, determines the preferred index of the crimping pressure corresponding to the target crimping fit; analyzes and determines the fit stability of the crimping pressure corresponding to the target crimping fit; combines the preferred index and the fit stability to determine the reliability, and uses the crimping pressure corresponding to the maximum reliability as the crimping pressure of the tube crimping machine. The method realizes the process of adaptively adjusting the crimping pressure by analyzing the actual situation of the explosion-proof flexible connecting pipe.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proof flexible connecting pipe processing, and in particular to an explosion-proof flexible connecting pipe processing device and method. Background Art

[0002] In the manufacturing process of explosion-proof flexible connecting pipes, crimping the nut and the outer jacket is a crucial step, which ensures that the outer jacket can fit tightly on the corrugated pipe, thus forming a strong and sealed connection. To achieve this goal, manufacturers need to use special equipment - a tube crimping machine to apply a certain degree of pressure to the outer jacket. However, this process requires very fine control: the pressure applied should not be too large or too small, because improper pressure will have a negative impact on the quality of the connecting pipe.

[0003] The existing method of adjusting the crimping pressure of the crimping machine during the processing of explosion-proof flexible connecting pipes is usually to manually adjust the crimping pressure, and it is difficult to adaptively adjust the crimping pressure according to the real-time situation of the explosion-proof flexible connecting pipe. If the applied pressure is too small, the outer jacket may not fit tightly with the bellows, which will cause gaps at the connection, thereby affecting the sealing performance and pressure resistance of the connecting pipe. In extreme cases, the gaps at the connection may even make the connecting pipe unable to withstand the pressure under the expected working conditions, thereby increasing the risk of leakage or failure. On the contrary, if the applied pressure is too large, the outer jacket may be excessively deformed, or even cracked or broken. Excessive crimping may also cause damage to the bellows, affecting its flexibility and fatigue resistance, and shortening the service life of the connecting pipe. In addition, excessive pressure may also make the clamping between the connecting nut and the inner sleeve unstable, thereby affecting the structural integrity of the entire explosion-proof flexible connecting pipe. Summary of the invention

[0004] In order to solve the technical problem that it is difficult to adaptively adjust the buckling pressure according to the actual situation of the explosion-proof flexible connecting pipe, the purpose of the present invention is to provide an explosion-proof flexible connecting pipe processing device and method, and the technical solution adopted is as follows:

[0005] In a first aspect, an embodiment of the present invention provides a method for processing an explosion-proof flexible connecting pipe, the method comprising:

[0006] Obtain the crimping pressure of the tube crimping machine and the crimping fit of the explosion-proof flexible connecting tube after crimping;

[0007] The pressure tree corresponding to the buckling pressure and the fit tree corresponding to the buckling fit degree are constructed by hierarchical clustering. The fit tree and the pressure tree are path matched to obtain the overall difference between the fit tree and the pressure tree.

[0008] Filter out the target crimping fit, match the path of each target crimping fit in the fit tree with the path of the crimping pressure corresponding to the target crimping fit in the pressure tree, and obtain the local error ratio of each target crimping fit;

[0009] Based on the overall difference and the proportion of local errors, determine the optimal index of the buckle pressure corresponding to the target buckle fit;

[0010] Analyze the stability of the buckle fit corresponding to the buckle pressure in the pressure set to which the buckle pressure corresponding to each target buckle fit belongs, as the fitting stability of the buckle pressure corresponding to the target buckle fit;

[0011] In combination with the preferred index and the fitting stability, the reliability of the crimping pressure corresponding to the target crimping fit is determined, and the crimping pressure corresponding to the maximum reliability is used as the crimping pressure of the tube crimping machine when processing the explosion-proof flexible connecting tube.

[0012] Furthermore, the method of obtaining the crimping pressure of the tube crimping machine and the crimping fit of the explosion-proof flexible connecting tube after crimping includes:

[0013] Taking any crimping pressure as a target crimping pressure, and performing roundness detection on the crimping joint of the explosion-proof flexible connecting pipe under the target crimping pressure, to obtain a roundness pass rate under the target crimping pressure;

[0014] Under the target pressing pressure, a taper test is performed on the pressing joint of the explosion-proof flexible connecting pipe to obtain a taper qualified rate under the target pressing pressure;

[0015] The minimum value of the roundness qualified rate and the taper qualified rate under the target buckling pressure is taken as the buckling fit corresponding to the target buckling pressure.

[0016] Furthermore, the step of constructing the pressure tree corresponding to the buckling pressure and the fit tree corresponding to the buckling fit by hierarchical clustering includes:

[0017] Using the hierarchical clustering algorithm, the buckling pressure is clustered through the bottom-up clustering method to obtain a hierarchical clustering tree as the pressure tree;

[0018] The buckle fit degree is clustered by a bottom-up clustering method using a hierarchical clustering algorithm to obtain a hierarchical clustering tree as the fit degree tree.

[0019] Furthermore, the path matching of the fit tree and the pressure tree is performed to obtain the overall difference between the fit tree and the pressure tree, including:

[0020] Obtaining all paths of the fit tree and the pressure tree;

[0021] Take each path of the fit tree as the left node and each path of the pressure tree as the right node, match the nodes on the left and right sides to obtain multiple matching node pairs, and calculate the mean of the edge values ​​of all matching node pairs as the overall similarity of the fit tree and the pressure tree;

[0022] The overall similarity is negatively correlated and mapped to obtain the overall difference between the fit tree and the pressure tree.

[0023] Furthermore, the method for obtaining the edge value of the matching node pair is:

[0024] Obtain the number of path nodes in the two paths corresponding to the matching node pair, and use the ratio of the minimum number of path nodes to the maximum number of path nodes as the first edge weight;

[0025] The path with the largest number of path nodes among the two paths corresponding to the matching node pair is taken as the multi-node path;

[0026] Get the number of nodes in the two paths that correspond to each other and have the same order value, which is recorded as the number of identical nodes;

[0027] The ratio of the number of same nodes to the number of nodes in the multi-node path is used as the second edge weight;

[0028] The product of the first edge weight and the second edge weight is used as the edge value of the matching node pair.

[0029] Furthermore, matching the path of each target crimping fit degree in the fit degree tree with the path of the crimping pressure corresponding to the target crimping fit degree in the pressure tree to obtain the local error ratio of each target crimping fit degree includes:

[0030] The path of the target crimping fit in the fit tree is taken as the left node, and the path of the crimping pressure corresponding to the target crimping fit in the pressure tree is taken as the right node. The left and right nodes are matched to obtain multiple matching node pairs, and the mean of the edge values ​​of all matching node pairs is calculated as the local similarity of the target crimping fit.

[0031] Performing negative correlation mapping on the local similarities to obtain local differences in target buckle fit;

[0032] Calculate the sum of the local differences of all target buckle fits as the global difference;

[0033] The ratio of the local difference and the global difference of each target buckle fit is taken as the local error ratio of each target buckle fit.

[0034] Furthermore, the method of determining the preferred index of the buckle pressure corresponding to the target buckle fit degree based on the overall difference and the local error ratio includes:

[0035] The product of the overall difference and the local error ratio is used as the preferred indicator of the buckle pressure corresponding to the target buckle fit.

[0036] Furthermore, the analysis of the stability of the buckle fit corresponding to the buckle pressure in the pressure set to which the buckle pressure corresponding to each target buckle fit belongs, as the fitting stability of the buckle pressure corresponding to the target buckle fit, includes:

[0037] The buckling pressures of the explosion-proof flexible connecting pipes are classified according to their sizes to obtain multiple pressure sets;

[0038] The buckling pressure corresponding to each target buckling fit degree is used as the target buckling pressure; the pressure set to which the target buckling pressure belongs is used as the target pressure set;

[0039] Determine the discrete value of the buckle pressure corresponding to the target buckle fit according to the discrete situation of the buckle fit corresponding to the buckle pressure in the target pressure set;

[0040] Negative correlation mapping is performed on the discrete values ​​of the fit to obtain the fit stability of the pressing pressure corresponding to the target pressing fit.

[0041] Furthermore, the combining of the preferred index and the fitting stability to determine the reliability of the pressing pressure corresponding to the target pressing fitting degree includes:

[0042] The product of the preferred index and the fitting stability is used as the reliability of the buckling pressure corresponding to the target buckling fit.

[0043] In a second aspect, an explosion-proof flexible connecting pipe processing device is provided, the device comprising the following modules:

[0044] A data preprocessing module is used to obtain the crimping pressure of the tube crimping machine and the crimping fit of the explosion-proof flexible connecting tube after crimping;

[0045] The overall analysis module is used to construct the pressure tree corresponding to the buckling pressure and the fit tree corresponding to the buckling fit through hierarchical clustering; the fit tree and the pressure tree are path matched to obtain the overall difference between the fit tree and the pressure tree;

[0046] A local analysis module is used to screen out target crimping fit, match the path of each target crimping fit in the fit tree with the path of the crimping pressure corresponding to the target crimping fit in the pressure tree, and obtain the local error ratio of each target crimping fit;

[0047] A first determination module is used to determine a preferred index of a buckle pressure corresponding to a target buckle fit based on overall differences and local error ratios;

[0048] The second determination module is used to analyze the stability of the buckling fit corresponding to the buckling pressure in the pressure set to which the buckling pressure corresponding to each target buckling fit belongs, as the fitting stability of the buckling pressure corresponding to the target buckling fit;

[0049] The pressure determination module is used to determine the reliability of the crimping pressure corresponding to the target crimping fit degree by combining the preferred index and the fitting stability, and use the crimping pressure corresponding to the maximum reliability as the crimping pressure of the tube crimping machine when processing the explosion-proof flexible connecting tube.

[0050] In a third aspect, an embodiment of the present invention provides an electronic device, including a memory and a processor, wherein the memory stores executable code, and when the processor executes the executable code, it implements the various possible embodiments of the first aspect.

[0051] In a fourth aspect, an embodiment of the present invention provides a computer program product, which includes: a computer program code, which, when executed on a computer, enables the computer to execute the method in the first aspect or any possible implementation of the first aspect.

[0052] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, enables the computer to execute various possible implementations of the first aspect.

[0053] The embodiments of the present invention have at least the following beneficial effects:

[0054] The present invention relates to the technical field of explosion-proof flexible connection pipe processing. The method first determines the overall difference between the fit tree and the pressure tree by analyzing the matching degree between the crimping pressure of the crimping machine and the corresponding crimping fit during the processing of the explosion-proof flexible connection pipe. When the crimping pressure and the crimping fit are more matched, the paths between the corresponding pressure tree and the fit tree are more matched, and then the overall overall difference between the fit tree and the pressure tree can be obtained. The overall difference considers the correlation between the crimping pressure and the crimping fit from the overall perspective. Furthermore, the selected target crimping fit is locally analyzed to determine the local error ratio of each target crimping fit, and the local error ratio reflects the local correlation between the crimping pressure and the crimping fit. Then, combined with the overall and local conditions, the preferred index of the crimping pressure corresponding to the single target pressure crimping fit is determined, and the preferred index determines the reliability of the corresponding crimping pressure from the correlation between the crimping fit and the crimping pressure. Furthermore, the stability of the correlation between the target crimping fit value and the corresponding crimping pressure is analyzed, and the value of the fit stability is used to characterize it. The reliability of the crimping pressure is determined by combining the two indicators of the preferred index and the fit stability. The greater the reliability, the better the crimping fit when the reliability is used as the crimping pressure of the crimping machine during the processing of the explosion-proof flexible connecting pipe. Therefore, the crimping pressure corresponding to the maximum reliability is used as the crimping pressure of the crimping machine during the processing of the explosion-proof flexible connecting pipe, thereby realizing the process of adaptively adjusting the crimping pressure by analyzing the actual situation of the explosion-proof flexible connecting pipe, avoiding the problem of affecting the structural integrity of the entire explosion-proof flexible connecting pipe due to excessive or insufficient crimping pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are 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.

[0056] Figure 1 A method flow chart of a method for processing an explosion-proof flexible connecting pipe provided by one embodiment of the present invention;

[0057] Figure 2 A schematic diagram of a module of an explosion-proof flexible connecting pipe processing device provided by an embodiment of the present invention;

[0058] Figure 3 A schematic diagram of the structure of a computer device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0059] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following, in combination with the accompanying drawings and preferred embodiments, a device and method for processing explosion-proof flexible connecting pipes proposed by the present invention, its specific implementation method, structure, characteristics and effects are described in detail as follows.

[0060] In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0061] Among them, in the description of the embodiments of the present invention, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a way to describe the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present invention, "multiple" refers to two or more than two.

[0062] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0063] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0064] The embodiments of the present invention are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

[0065] The embodiment of the present invention provides a specific implementation method of an explosion-proof flexible connecting pipe processing device and method, which is applicable to a pipe crimping machine used in the process of processing explosion-proof flexible connecting pipes. Please refer to the publication number: CN112045054B, the invention name is: A device of a high-pressure pipe crimping machine. The pipe crimping machine crimps the explosion-proof flexible connecting pipe, and the crimped part of the explosion-proof flexible connecting pipe after the crimping process is the crimping joint.

[0066] The specific scheme of an explosion-proof flexible connecting pipe processing device and method provided by the present invention is described in detail below with reference to the accompanying drawings.

[0067] See also Figure 1 , which shows a flowchart of a method for processing an explosion-proof flexible connecting pipe provided by an embodiment of the present invention, the method comprising the following steps:

[0068] Step S100, obtaining the crimping pressure of the tube crimping machine and the crimping fit of the explosion-proof flexible connecting tube after crimping.

[0069] The purpose of the embodiment of the present invention is to obtain the optimal pressure value of the tube crimping machine during the processing of the explosion-proof flexible connecting pipe by analyzing the historical data during the processing of the explosion-proof flexible connecting pipe. Therefore, it is first necessary to collect the historical data during the processing of the explosion-proof flexible connecting pipe to realize the analysis of the processing process of the explosion-proof flexible connecting pipe.

[0070] The historical data of the explosion-proof flexible connecting pipe processing includes the pressure value of the tube crimping machine at the historical moment and the corresponding fit of the explosion-proof flexible connecting pipe after crimping processing. One pressure value corresponds to one fit. The pressure value can be obtained directly from the control panel of the tube crimping machine, or the crimping pressure can be obtained through the pressure sensor equipped on the tube crimping machine. The crimping pressure is the crimping pressure, and the fit is the crimping fit.

[0071] Then, the explosion-proof flexible connecting pipe is subjected to a fit analysis. When analyzing and determining the buckle fit, the size collection of the explosion-proof flexible connecting pipe is completed by using a caliper or a micrometer. In the embodiment of the present invention, the buckle fit analysis is performed based on the roundness and taper.

[0072] Roundness refers to the degree of closeness of the cross section of an object to an ideal circle. During the processing, the roundness test is to ensure that there is no obvious deformation or irregular deformation of the circular cross section of the crimping joint of the explosion-proof flexible connecting pipe after processing by the crimping machine.

[0073] In some embodiments, an arbitrary crimping pressure is used as the target crimping pressure, and under the target crimping pressure, the crimping joint of the explosion-proof flexible connecting pipe is tested for roundness to obtain the roundness pass rate under the target crimping pressure. First, a measuring tool such as a caliper or a micrometer is used to measure the actual outer diameter and the actual inner diameter of the crimping joint, and the absolute value of the difference between the actual inner diameter and the designed inner diameter is used as the numerator, the maximum value of the actual inner diameter and the designed inner diameter is used as the denominator, and the negatively correlated normalized value of the obtained ratio is used as the inner diameter compliance rate; similarly, the absolute value of the difference between the actual outer diameter and the designed outer diameter is used as the numerator, the maximum value of the actual outer diameter and the designed outer diameter is used as the denominator, and the negatively correlated normalized value of the obtained ratio is used as the outer diameter compliance rate. It should be noted that the designed outer diameter and the designed inner diameter are the standard inner diameter and the standard outer diameter of the crimping joint of the explosion-proof flexible connecting pipe set by the implementer before implementation.

[0074] Taper refers to the degree to which the cross-section of an object gradually decreases from one end to the other. In crimp joints, the presence of taper may cause inconsistent tightness of the joint, thus affecting the quality and strength of the connection.

[0075] In some embodiments, under the target pressing pressure, the taper detection is performed on the pressing joint of the explosion-proof flexible connecting pipe to obtain the taper qualification rate under the target pressing pressure. Similarly, the actual taper can be calculated by measuring the diameters at both ends of the pressing joint using measuring tools such as calipers or micrometers. The actual taper is compared with the designed taper, and the absolute value of the difference between the actual outer diameter and the designed outer diameter is recorded as z to ensure that the taper is within the allowable error range. The value of the exponential function with the natural constant as the base and the opposite number of z as the exponent is taken as the taper qualification rate.

[0076] The minimum value of the roundness qualified rate and the taper qualified rate under the target buckling pressure is taken as the buckling fit corresponding to the target buckling pressure.

[0077] Then different buckling pressures and corresponding buckling fits are obtained.

[0078] Step S200, constructing a pressure tree corresponding to the crimping pressure and a fit tree corresponding to the crimping fit by hierarchical clustering; performing path matching on the fit tree and the pressure tree to obtain the overall difference between the fit tree and the pressure tree.

[0079] Hierarchical clustering trees can reflect the hierarchical structure and similarity relationship between data. Hierarchical clustering creates a hierarchical nested clustering tree by calculating the similarity between data points of different categories. The bottom layer of the tree is the original data point, and the top layer is the root node of a cluster. This structure can intuitively show the hierarchical relationship and similarity between data points.

[0080] Because there may be various errors in the actual operation of crimping explosion-proof flexible connecting pipes, the values ​​of crimping pressure and crimping fit may not be the only corresponding relationship. Even if there is no error, the same machine uses crimping pressure A1 for the first time and crimping pressure A1 for the 10,000th time to crimp explosion-proof flexible connecting pipes. Due to the different usage status of the machine, one is the first use and the other is the 100th use, and the degree of wear of the machine is different. Even for the same explosion-proof flexible connecting pipe, the crimping fit may not be the same. When processing different explosion-proof flexible connecting pipes, the crimping machine uses the same crimping pressure, and the probability of the corresponding crimping fit being different is greater.

[0081] In order to facilitate the subsequent analysis of the correlation between the crimping pressure and the crimping fit in the embodiment of the present invention, the crimping pressure is first clustered by a bottom-up clustering method using a hierarchical clustering algorithm to obtain a hierarchical clustering tree as a pressure tree; then the crimping fit is clustered by a bottom-up clustering method using a hierarchical clustering algorithm to obtain a hierarchical clustering tree as a fit tree. The similarity of any two nodes is calculated at each level, and the similarity is: the ratio of the minimum value to the maximum value of the corresponding values ​​of the two nodes.

[0082] The hierarchical clustering tree of the crimping fit can represent the distribution relationship of the crimping fit, and the hierarchical clustering tree of the crimping pressure can represent the distribution relationship of the crimping pressure; if the corresponding relationship between the crimping pressure and the crimping fit is relatively stable, the fit tree and the pressure tree are relatively similar; if the crimping pressure and the crimping fit have only a one-to-one relationship, the fit tree and the pressure tree are the same.

[0083] Furthermore, all paths of the fit tree and the pressure tree are obtained, and each path is a node sequence from a root node to a leaf node.

[0084] Match different paths of the fit tree and the pressure tree. In the existing matching algorithm, KM matching is a method for calculating the matching relationship between multiple nodes on the left and multiple nodes on the right. The multiple nodes on the left belong to one category, and the multiple nodes on the right belong to another category. Each node on the left is connected to each node on the right by an edge.

[0085] In an embodiment of the present invention, the KM matching algorithm is used to implement path matching of the fit tree and the pressure tree to obtain the overall difference between the fit tree and the pressure tree. Specifically: each path of the fit tree is used as a left node, and each path of the pressure tree is used as a right node. The left and right nodes are matched to obtain multiple matching node pairs, and the mean of the edge values ​​of all matching node pairs is calculated as the overall similarity of the fit tree and the pressure tree; further, the overall similarity is negatively correlated and mapped to obtain the overall difference between the fit tree and the pressure tree.

[0086] Through KM matching, when each path of the fit tree is used as the left node and each path of the pressure tree is used as the right node, a one-to-one matching relationship between the left node and the right node is obtained, that is, multiple edges representing the corresponding relationship are obtained, that is, a matching node pair constitutes an edge, recorded as a matching edge, and the mean of the edge value of the matching edge is recorded as the overall similarity of the fit tree and the pressure tree, that is, the mean of the edge values ​​of all matching node pairs is calculated as the overall similarity of the fit tree and the pressure tree.

[0087] In one embodiment of the present invention, 1 minus the overall similarity is used as the overall difference between the fit tree and the pressure tree, and a negative correlation mapping of the overall similarity is achieved by subtracting 1 from the overall similarity to obtain the difference between the two hierarchical clustering trees.

[0088] In one embodiment of the present invention, when performing path matching between the fit tree and the pressure tree, taking any left node a1 and right node b1 as an example, the method for obtaining the edge value between the nodes on both sides is:

[0089] When two paths are similar or matched, the number of nodes they correspond to is also similar. Therefore, the number of path nodes in the two paths corresponding to the left node a1 and the right node b1 is obtained, and the ratio of the minimum number of path nodes to the maximum number of path nodes is used as the first edge weight. It should be noted that the ratio of the minimum value to the maximum value is calculated, not the ratio of the maximum value to the minimum value, in order to ensure that the calculated value of the first edge weight is not greater than 1.

[0090] The path with the largest number of path nodes among the two paths corresponding to the left node a1 and the right node b1 is taken as the multi-node path;

[0091] Because each crimping pressure corresponds to a crimping fit, when the positions of the corresponding crimping pressure and crimping fit in the path are the same, the correlation between the two paths is stronger, so the number of nodes with the same order value in the two paths is obtained, which is recorded as the number of identical nodes. It should be noted that the nodes in the path of the pressure tree are crimping pressures, and the nodes in the path of the fit tree are crimping fits. The order value of the nodes is the order of the nodes obtained from the root node to the leaf node of the hierarchical clustering tree. For example, when the path in the pressure tree is abcd and the path in the fit tree is ABDC, the uppercase and lowercase letters of the same letter reflect the corresponding relationship between the crimping pressure and the crimping fit; for example, the crimping fit corresponding to crimping pressure A is a, and the crimping fit corresponding to crimping pressure B is b; when the path in the pressure tree is abcd and the path in the fit tree is ABDC, the number of nodes with the same order value in the two paths is 2, and the corresponding number of identical nodes is 2.

[0092] The ratio of the number of identical nodes to the number of nodes in the multi-node path is used as the second edge weight; and the product of the first edge weight and the second edge weight is used as the edge value of the matching node pair.

[0093] In another embodiment of the present invention, the first edge weight may be used alone as the edge value for matching node pairs, and the second edge weight may be used alone as the edge value for matching node pairs.

[0094] Step S300, screen out target crimping fits, match the path of each target crimping fit in the fit tree with the path of the crimping pressure corresponding to the target crimping fit in the pressure tree, and obtain the local error ratio of each target crimping fit.

[0095] Among all the crimping fits, the crimping pressure corresponding to the larger crimping fit is better, but some crimping pressures are better but less stable. For example, the crimping pressure corresponding to a larger crimping fit is greatly different from the crimping fit corresponding to the data around the larger crimping fit, indicating that the crimping pressure corresponding to the larger crimping fit may be in a critical range. When crimping the subsequent connecting pipes, there may be more explosion-proof flexible connecting pipes with lower crimping fit, which will affect the quality.

[0096] Therefore, in the embodiment of the present invention, a larger buckle fit is first screened out as a target buckle fit, and the target buckle fit is subsequently analyzed to avoid the problem of large amount of calculation caused by analyzing all buckle fits.

[0097] In an embodiment of the present invention, the method for screening out the target crimping fit is: arranging all the crimping fits in ascending order to obtain an ascending sequence of crimping fits; segmenting the ascending sequence of crimping fits through OTSU multi-threshold segmentation to obtain multiple segmented segments, and taking the crimping fit in the last segment as the target crimping fit.

[0098] After the target crimping fit is obtained, a plurality of crimping fit paths to which the target crimping fit belongs are obtained. It should be noted that the crimping fit path is a path in the fit tree, and the pressure path is a path in the pressure tree.

[0099] Match the path of each target crimping fit in the fit tree with the path of the crimping pressure corresponding to the target crimping fit in the pressure tree to obtain the local error ratio of each target crimping fit, specifically:

[0100] The path of the target crimping fit in the fit tree is used as the left node, and the path of the crimping pressure corresponding to the target crimping fit in the pressure tree is used as the right node. The KM algorithm is also used to match the left and right nodes to obtain multiple matching node pairs, and the mean of the edge values ​​of all matching node pairs is calculated as the local similarity of the target crimping fit. It should be noted that the method for obtaining the edge values ​​of the matching node pairs has been defined in step S200 and will not be repeated here.

[0101] The local similarity is negatively correlated and mapped to obtain the local difference of the target crimping fit. In the embodiment of the present invention, the value obtained by subtracting the local similarity from 1 can be used as the local difference of the target crimping fit to achieve negative correlation mapping of the local similarity.

[0102] The sum of the local differences of all target buckle fits is calculated as the global difference, and the ratio of the local difference to the global difference of each target buckle fit is taken as the local error ratio of each target buckle fit.

[0103] The larger the proportion of the local error, the more it reflects that the distribution of the larger target crimping fit and the corresponding crimping pressure in the respective data sets is not similar. In this case, if the crimping pressure corresponding to the larger target crimping fit is used as the crimping pressure for the subsequent processing of the connecting pipe, greater instability will occur, and there is a greater probability of causing a bad processing result.

[0104] Step S400: determining a preferred index of the buckle pressure corresponding to the target buckle fit based on the overall difference and the local error ratio.

[0105] The overall difference reflects the hierarchical structure and similarity relationship between the data in the pressure tree and the fit tree, that is, it reflects the relationship between the crimping pressure of the crimping machine and the crimping fit after processing. The local error ratio reflects the distribution of the target crimping fit and the corresponding crimping pressure. The larger the local error ratio, the greater the probability of instability. The local error ratio focuses more on reflecting the relationship between a single target crimping fit and the crimping pressure. Therefore, further, combined with the overall difference and the local error ratio, the optimal index of the crimping pressure corresponding to the target crimping fit is determined, among which the overall difference and the local error ratio are both positively correlated with the optimal index.

[0106] In one embodiment of the present invention, the product of the overall difference and the local error ratio is used as a preferred indicator of the buckle pressure corresponding to the target buckle fit.

[0107] Step S500, analyzing the stability of the buckle fit corresponding to the buckle pressure in the pressure set to which the buckle pressure corresponding to each target buckle fit belongs, as the fitting stability of the buckle pressure corresponding to the target buckle fit.

[0108] If the target crimping fit is large, the crimping pressure corresponding to the target crimping fit can be obtained. However, if the crimping fit around the crimping pressure, that is, the crimping fit of similar crimping pressures is quite different from the target crimping fit, it means that the fitting effect of the crimping pressure is not very stable. For example, it may be affected by various factors such as machine vibration during actual operation, which often leads to the crimping pressure being unable to be precisely located, but hovering around the crimping pressure, thereby affecting the processing quality. Therefore, it is necessary to select a crimping pressure with better stability in the crimping fit.

[0109] The fitting stability of the crimping pressure is determined based on the above analysis. Specifically, the crimping pressure of the explosion-proof flexible connecting pipe is classified according to size to obtain multiple pressure sets; dividing the pressure sets enables similar crimping pressure data to be grouped into the same set.

[0110] The buckling pressure corresponding to each target buckling fit is taken as the target buckling pressure; the pressure set to which the target buckling pressure belongs is taken as the target pressure set; according to the discrete situation of the buckling fit corresponding to the buckling pressure in the target pressure set, the fitting discrete value of the buckling pressure corresponding to the target buckling fit is determined; the fitting discrete value reflects the discrete situation of the buckling pressure, and the larger the fitting discrete value, the more unstable the buckling pressure corresponding to the target buckling fit is.

[0111] In the embodiment of the present invention, the fitting discrete value is the variance of the buckling pressure in the target pressure set. In other embodiments, the standard deviation of the buckling pressure in the target pressure set can also be used as the fitting discrete value.

[0112] Then, by negatively mapping the discrete values ​​of the fit, a value reflecting the stability of the buckling pressure can be obtained. Therefore, by negatively mapping the discrete values ​​of the fit, the fit stability of the buckling pressure corresponding to the target buckling fit can be obtained. In an embodiment of the present invention, the result value of an exponential function with the natural constant e as the base and the opposite number of the fit stability as the exponent is used as the fit stability of the buckling pressure corresponding to the target buckling fit. That is, the calculation formula for the fit stability is: ; Wherein, G is the fitting stability; e is the natural constant; s is the fitting discrete value.

[0113] Step S600, combining the preferred index and the fitting stability, determining the reliability of the crimping pressure corresponding to the target crimping fit, and using the crimping pressure corresponding to the maximum reliability as the crimping pressure of the tube crimping machine when processing the explosion-proof flexible connecting tube.

[0114] The preferred index is determined by analyzing the hierarchical structure and similarity relationship between the data in the pressure tree and the fit tree, the distribution of the target buckle fit and the corresponding buckle pressure. The larger the preferred index, the higher the reliability of the buckle pressure. The fit stability reflects the fit of the explosion-proof flexible connecting pipe under the buckle pressure. Therefore, step S600 determines the reliability of the buckle pressure corresponding to the target buckle fit by integrating the preferred index and the fit stability.

[0115] In one embodiment of the present invention, for each target crimping fit and target crimping pressure, the product of the corresponding preferred index and the fit stability is used as the reliability of the crimping pressure corresponding to the target crimping fit. The higher the reliability, the better the crimping fit when the corresponding crimping pressure is used as the pressure parameter of the crimping machine to process the subsequent explosion-proof flexible connecting pipe.

[0116] Therefore, in the embodiment of the present invention, the crimping pressure corresponding to the maximum reliability is used as the crimping pressure of the tube crimping machine when processing the explosion-proof flexible connecting tube.

[0117] In summary, the present invention relates to the technical field of explosion-proof flexible connecting pipe processing. The method firstly considers the crimping pressure and the corresponding crimping fit of the pipe crimping machine during the processing of the explosion-proof flexible connecting pipe from multiple aspects, analyzes the correlation between the crimping pressure and the crimping fit, and determines the most reliable crimping pressure as the crimping pressure of the pipe crimping machine during the processing of the explosion-proof flexible connecting pipe.

[0118] See also Figure 2 , Figure 2 A schematic diagram of a module of an explosion-proof flexible connecting pipe processing device provided by an embodiment of the present invention.

[0119] An embodiment of the present invention provides an explosion-proof flexible connecting pipe processing device, the device comprising:

[0120] A data preprocessing module is used to obtain the crimping pressure of the tube crimping machine and the crimping fit of the explosion-proof flexible connecting tube after crimping;

[0121] The overall analysis module is used to construct the pressure tree corresponding to the buckling pressure and the fit tree corresponding to the buckling fit through hierarchical clustering; the fit tree and the pressure tree are path matched to obtain the overall difference between the fit tree and the pressure tree;

[0122] A local analysis module is used to screen out target crimping fit, match the path of each target crimping fit in the fit tree with the path of the crimping pressure corresponding to the target crimping fit in the pressure tree, and obtain the local error ratio of each target crimping fit;

[0123] A first determination module is used to determine a preferred index of a buckle pressure corresponding to a target buckle fit based on overall differences and local error ratios;

[0124] The second determination module is used to analyze the stability of the buckling fit corresponding to the buckling pressure in the pressure set to which the buckling pressure corresponding to each target buckling fit belongs, as the fitting stability of the buckling pressure corresponding to the target buckling fit;

[0125] The pressure determination module is used to determine the reliability of the crimping pressure corresponding to the target crimping fit degree by combining the preferred index and the fitting stability, and use the crimping pressure corresponding to the maximum reliability as the crimping pressure of the tube crimping machine when processing the explosion-proof flexible connecting tube.

[0126] Optionally, the transmission medium may be a wired link, such as but not limited to coaxial cable, optical fiber, and digital subscriber line, or a wireless link, such as but not limited to Wireless Fidelity (WIFI), Bluetooth, and mobile device network.

[0127] It should be noted that: the device provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the computer device is divided into different functional modules to complete all or part of the functions described above. In addition, the shopping guide device provided in the above embodiment and the image extension method embodiment belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0128] Figure 3 is a schematic diagram of the structure of a computer device provided by an embodiment of the present invention. Figure 3 As shown, the computer device 700 includes: a memory 710, a processor 720, and a computer program 730 stored in the memory 710 and running on the processor 720, wherein when the processor 720 executes the computer program 730, the computer device can execute any one of the above-mentioned explosion-proof flexible connecting pipe processing methods.

[0129] In addition, an embodiment of the present invention also protects a device, which may include a memory and a processor, wherein the memory stores an executable program code, and the processor is used to call and execute the executable program code to execute an explosion-proof flexible connecting pipe processing method provided by an embodiment of the present invention.

[0130] The embodiment of the present invention can divide the functional modules of the device according to the above method example. For example, each functional module can be corresponded, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0131] In the case of dividing each module according to each function, the device may also include a signal uploading module, a determining module, an adjusting module, etc. It should be noted that all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, which will not be repeated here.

[0132] It should be understood that the device provided in the embodiment of the present invention is used to execute the above-mentioned method for processing an explosion-proof flexible connecting pipe, and thus can achieve the same effect as the above-mentioned implementation method.

[0133] In the case of an integrated unit, the device may include a processing module and a storage module. When the device is applied to a device, the processing module may be used to control and manage the actions of the device. The storage module may be used to support the device to execute mutual program codes, etc. The processing module may be a processor or a controller, which may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present invention. The processor may also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module may be a memory.

[0134] In addition, the device provided in an embodiment of the present invention may specifically be a chip, a component or a module, and the chip may include a connected processor and a memory; wherein the memory is used to store instructions, and when the processor calls and executes the instructions, the chip can execute a method for processing an explosion-proof flexible connecting pipe provided in the above embodiment.

[0135] An embodiment of the present invention also provides a computer-readable storage medium, in which a computer program code is stored. When the computer program code is run on a computer, the computer executes the above-mentioned related method steps to implement an explosion-proof flexible connecting pipe processing method provided in the above embodiment.

[0136] An embodiment of the present invention further provides a computer program product. When the computer program product is run on a computer, the computer is enabled to execute the above-mentioned related steps to implement a method for processing an explosion-proof flexible connecting pipe provided in the above embodiment.

[0137] Among them, the device, computer-readable storage medium, computer program product or chip provided in the embodiments of the present invention are all used to execute the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above, and will not be repeated here. Through the description of the above implementation methods, technicians in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In the embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways.

[0138] The device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. There may be other divisions in actual implementation. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0139] It should also be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0140] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0141] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0142] The above contents are only specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A method for processing an explosion-proof flexible connecting pipe, characterized in that: The method comprises the following steps: Obtain the crimping pressure of the tube crimping machine and the crimping fit of the explosion-proof flexible connecting tube after crimping; The pressure tree corresponding to the buckling pressure and the fit tree corresponding to the buckling fit degree are constructed by hierarchical clustering. The fit tree and the pressure tree are path matched to obtain the overall difference between the fit tree and the pressure tree. Filter out the target crimping fit, match the path of each target crimping fit in the fit tree with the path of the crimping pressure corresponding to the target crimping fit in the pressure tree, and obtain the local error ratio of each target crimping fit; Based on the overall difference and the proportion of local errors, determine the optimal index of the buckle pressure corresponding to the target buckle fit; Analyze the stability of the buckle fit corresponding to the buckle pressure in the pressure set to which the buckle pressure corresponding to each target buckle fit belongs, as the fitting stability of the buckle pressure corresponding to the target buckle fit; In combination with the preferred index and the fitting stability, the reliability of the crimping pressure corresponding to the target crimping fitting degree is determined, and the crimping pressure corresponding to the maximum reliability is used as the crimping pressure of the tube crimping machine when processing the explosion-proof flexible connecting tube; The method for obtaining the overall difference between the fit tree and the pressure tree is as follows: obtaining all paths of the fit tree and the pressure tree; taking each path of the fit tree as a left node and each path of the pressure tree as a right node, matching the left and right nodes to obtain multiple matching node pairs, and calculating the mean of the edge values ​​of all matching node pairs as the overall similarity between the fit tree and the pressure tree; performing negative correlation mapping on the overall similarity to obtain the overall difference between the fit tree and the pressure tree; Among them, the method for obtaining the fitting stability is: classify the buckling pressure of the explosion-proof flexible connecting pipe according to the size to obtain multiple pressure sets; take the buckling pressure corresponding to each target buckling fit as the target buckling pressure; take the pressure set to which the target buckling pressure belongs as the target pressure set; determine the fitting discrete value of the buckling pressure corresponding to the target buckling fit according to the discrete situation of the buckling fit corresponding to the buckling pressure in the target pressure set; perform negative correlation mapping on the fitting discrete values ​​to obtain the fitting stability of the buckling pressure corresponding to the target buckling fit.

2. The method for processing an explosion-proof flexible connecting pipe according to claim 1, characterized in that: The method of obtaining the crimping pressure of the tube crimping machine and the crimping fit of the explosion-proof flexible connecting tube after the crimping process includes: Taking any crimping pressure as a target crimping pressure, and performing roundness detection on the crimping joint of the explosion-proof flexible connecting pipe under the target crimping pressure, to obtain a roundness pass rate under the target crimping pressure; Under the target pressing pressure, a taper test is performed on the pressing joint of the explosion-proof flexible connecting pipe to obtain a taper qualified rate under the target pressing pressure; The minimum value of the roundness qualified rate and the taper qualified rate under the target buckling pressure is taken as the buckling fit corresponding to the target buckling pressure.

3. The method for processing an explosion-proof flexible connecting pipe according to claim 1, characterized in that: The step of constructing a pressure tree corresponding to the buckling pressure and a fit tree corresponding to the buckling fit by hierarchical clustering includes: Using the hierarchical clustering algorithm, the buckling pressure is clustered through the bottom-up clustering method to obtain a hierarchical clustering tree as the pressure tree; The buckle fit degree is clustered by a bottom-up clustering method using a hierarchical clustering algorithm to obtain a hierarchical clustering tree as the fit degree tree.

4. The method for processing an explosion-proof flexible connecting pipe according to claim 1, characterized in that: The method for obtaining the edge value of the matching node pair is: Obtain the number of path nodes in the two paths corresponding to the matching node pair, and use the ratio of the minimum number of path nodes to the maximum number of path nodes as the first edge weight; The path with the largest number of path nodes among the two paths corresponding to the matching node pair is taken as the multi-node path; Get the number of nodes in the two paths that correspond to each other and have the same order value, which is recorded as the number of identical nodes; The ratio of the number of same nodes to the number of nodes in the multi-node path is used as the second edge weight; The product of the first edge weight and the second edge weight is taken as the edge value of the matching node pair.

5. The method for processing an explosion-proof flexible connecting pipe according to claim 1, characterized in that: The matching of the path of each target crimping fit degree in the fit degree tree with the path of the crimping pressure corresponding to the target crimping fit degree in the pressure tree to obtain the local error ratio of each target crimping fit degree includes: The path of the target crimping fit in the fit tree is taken as the left node, and the path of the crimping pressure corresponding to the target crimping fit in the pressure tree is taken as the right node. The left and right nodes are matched to obtain multiple matching node pairs, and the mean of the edge values ​​of all matching node pairs is calculated as the local similarity of the target crimping fit. Performing negative correlation mapping on the local similarities to obtain local differences in target buckle fit; Calculate the sum of the local differences of all target buckle fits as the global difference; The ratio of the local difference and the global difference of each target buckle fit is taken as the local error ratio of each target buckle fit.

6. The method for processing an explosion-proof flexible connecting pipe according to claim 1, characterized in that: The method of determining the preferred index of the buckle pressure corresponding to the target buckle fit degree based on the overall difference and the local error ratio includes: The product of the overall difference and the local error ratio is used as the preferred indicator of the buckle pressure corresponding to the target buckle fit.

7. The method for processing an explosion-proof flexible connecting pipe according to claim 1, characterized in that: The step of determining the reliability of the pressing pressure corresponding to the target pressing fit degree by combining the preferred index and the fitting stability includes: The product of the preferred index and the fitting stability is used as the reliability of the buckling pressure corresponding to the target buckling fit.

8. An explosion-proof flexible connecting pipe processing device, characterized in that: The device is used to implement a method for processing an explosion-proof flexible connecting pipe according to any one of claims 1 to 7, and the device comprises the following modules: A data preprocessing module is used to obtain the crimping pressure of the tube crimping machine and the crimping fit of the explosion-proof flexible connecting tube after crimping; The overall analysis module is used to construct the pressure tree corresponding to the buckling pressure and the fit tree corresponding to the buckling fit through hierarchical clustering; the fit tree and the pressure tree are path matched to obtain the overall difference between the fit tree and the pressure tree; A local analysis module is used to screen out target crimping fit, match the path of each target crimping fit in the fit tree with the path of the crimping pressure corresponding to the target crimping fit in the pressure tree, and obtain the local error ratio of each target crimping fit; A first determination module is used to determine a preferred index of a crimping pressure corresponding to a target crimping fit based on overall differences and local error ratios; The second determination module is used to analyze the stability of the buckling fit corresponding to the buckling pressure in the pressure set to which the buckling pressure corresponding to each target buckling fit belongs, as the fitting stability of the buckling pressure corresponding to the target buckling fit; The pressure determination module is used to determine the reliability of the crimping pressure corresponding to the target crimping fit degree by combining the preferred index and the fitting stability, and use the crimping pressure corresponding to the maximum reliability as the crimping pressure of the tube crimping machine when processing the explosion-proof flexible connecting tube.

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