Trim strip detection method, system, terminal and storage medium based on three-dimensional modeling

Abstract

The present application relates to a method, system, terminal and storage medium for detecting decorative strips based on three-dimensional modeling, and relates to the field of accessory detection. The method includes: scanning the outer contour of the decorative strip to be tested to obtain a first three-dimensional model of the decorative strip to be tested; calculating and obtaining the first surface profile error between the first three-dimensional model and the first standard model; if the first surface profile error is less than the first preset error, the decorative strip to be tested is installed on a flexible measurement bracket, the flexible measurement bracket is used to simulate the installation environment of the decorative strip, and the flexible measurement bracket exposes the installation surface of the decorative strip to be tested; scanning the outer contour of the decorative strip to be tested to obtain a second three-dimensional model of the decorative strip to be tested; calculating the second surface profile error between the second three-dimensional model and the second standard model; if the second surface profile error is greater than the second preset error, adjusting the process parameters of the processing technology of the decorative strip to be tested according to the second surface profile error. The present application has the effect of accurately detecting the size of the decorative strip.

Description

Technical Field

[0001] The present application relates to the field of accessory detection, and in particular to a trim detection method, system, terminal and storage medium based on three-dimensional modeling. Background Art

[0002] Trim is a strip or plate material used to decorate or protect the edge of an object. It is usually used in the fields of automobiles, furniture, construction, etc. It can enhance the appearance, provide additional protection or hide seams. Each batch of trim needs to be tested for size before leaving the factory to ensure its quality.

[0003] The relevant technology requires that the decorative strip be installed in a special fixture, and the technical personnel shall judge the installation condition of the decorative strip in the fixture, whether there is a gap between the decorative strip and the fixture, whether there are abnormal protrusions on the decorative strip, whether the decorative strip and the fixture are tightly fitted, etc.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the standard for judging whether the quality of the decorative strips is qualified is too subjective and it is easy to misjudge the quality of the decorative strips. Summary of the invention

[0005] In order to accurately detect the size of a trim strip, the present application provides a trim strip detection method, system, terminal and storage medium based on three-dimensional modeling.

[0006] In a first aspect, the present application provides a trim strip detection method based on three-dimensional modeling, which adopts the following technical solution:

[0007] A trim strip detection method based on three-dimensional modeling, comprising:

[0008] Scanning the outer contour of the decorative strip to be tested to obtain a first three-dimensional model of the decorative strip to be tested;

[0009] Calculating and obtaining a first surface profile error between the first three-dimensional model and the first standard model, where the first standard model is used to record a standard size of the trim strip in an uninstalled state;

[0010] If the first surface profile error is less than the first preset error, the decorative strip to be measured is installed on a flexible measuring bracket, the flexible measuring bracket is used to simulate the installation environment of the decorative strip, and the flexible measuring bracket exposes the installation surface of the decorative strip to be measured;

[0011] Scanning the outer contour of the decorative strip to be tested to obtain a second three-dimensional model of the decorative strip to be tested;

[0012] Calculating a second surface profile error between the second three-dimensional model and the second standard model, the second standard model being used to record a standard size of the decorative strip in an installed state;

[0013] If the second surface profile error is greater than the second preset error, the process parameters of the processing technology of the decorative strip to be tested are adjusted according to the second surface profile error.

[0014] By adopting the above technical solution, the trim strips in the uninstalled state and the installed state are scanned, and the three-dimensional models of the trim strips in the two states are obtained. The three-dimensional model is compared with the corresponding standard model to obtain a quantifiable surface profile to represent the quality of the trim strip. This method enables the quality of the trim strip to have quantifiable objective standard parameters, and does not need to be determined by manual subjective judgment, so the quality judgment of the trim strip is more accurate.

[0015] Optionally, a reference point is set on the flexible measuring bracket according to the installation method of the trim to be measured;

[0016] Taking the reference point as the starting point, scan along the edge area of ​​the trim to be tested first to obtain the line edge features of the trim to be tested;

[0017] Scan the trim to be tested to obtain an initial three-dimensional model of the trim to be tested;

[0018] The initial three-dimensional model is updated by combining line and edge features to obtain a second three-dimensional model.

[0019] By adopting the above technical solution, under the premise of setting the reference point, the edge area of ​​the decorative strip to be measured is scanned preferentially, so that the size of the edge area of ​​the second three-dimensional model can be more accurate and closer to the actual size of the decorative strip to be measured.

[0020] Optionally, when the edge area of ​​the decorative strip to be measured is an inclined surface, a first distance from the scanning device to the edge area is obtained;

[0021] Controlling the scanning device to move in a direction perpendicular to the edge of the trim strip to be measured;

[0022] Acquire a second distance from the scanning device to the edge area;

[0023] Obtaining the slope of the bevel of the edge area of ​​the decorative strip to be measured according to the first distance, the second distance and the moving distance of the scanning device;

[0024] Repeat the above four steps to obtain a slope set consisting of at least two slopes;

[0025] Determine whether the variance of adjacent slopes in the slope set is less than a preset variance;

[0026] If yes, then calculate the mean of the slopes in the slope set to obtain the predicted slope of the edge area; obtain the thickness distribution of the edge area according to the predicted slope and the width of the edge area; and generate the detection result of the trim strip to be tested according to the thickness distribution and the preset thickness distribution;

[0027] If not, the process parameters of the processing technology of the tested decorative strip are adjusted according to the variance.

[0028] By adopting the above technical solution, when there is an inclined surface in the edge area of ​​the tested decorative strip, the thickness distribution of the tested decorative strip in the edge area can be predicted by the slope of the inclined surface, and the detection result of the tested decorative strip can be judged according to the thickness distribution. Even if the thickness of the edge area is less than the minimum value of the scanning device, the thickness of the edge area can be predicted by this technical solution to judge whether the thickness of the edge area meets the requirements.

[0029] Optionally, when there is a through hole in the edge area and the diameter of the through hole is smaller than a preset length, controlling the scanning device to irradiate the through hole;

[0030] Collect the actual light spot on the imaging plane. The actual light spot is formed on the imaging plane after the light emitted by the scanning device passes through the through hole;

[0031] Obtaining a third distance between the scanning device and the trim to be measured;

[0032] Obtaining a fourth distance from the trim to be measured to the imaging plane;

[0033] Calculating a preset light spot corresponding to the through hole according to the third distance, the fourth distance and the second standard model;

[0034] If the shape difference between the actual light spot and the preset light spot is greater than the preset shape difference, the process parameters of the punching process of the decorative strip to be tested are adjusted according to the shape of the actual light spot.

[0035] By adopting the above technical solution, the actual light spot passing through the through hole is compared with the calculated preset light spot to determine whether the shape and size of the through hole meet the standard.

[0036] Optionally, determining whether a processing device of the trim strip to be tested has a system error;

[0037] If so, the processing equipment is suspended and an error message is sent to the terminal of the person in charge;

[0038] If not, the injection flow rate of the processing technology is adjusted according to the difference between the curvature of the current profile surface and the curvature of the standard profile surface;

[0039] Obtaining contrast trim produced by the adjusted processing technology;

[0040] Obtain the profile error of the third surface corresponding to the comparison trim;

[0041] If the profile error of the third surface is less than the second preset error, the process parameters of the machining process are maintained, and a process adjustment signal is sent to the terminal of the person in charge;

[0042] If the third surface profile error is greater than the second preset error, the process parameters of the machining process are adjusted according to the second surface profile error and the third surface profile error, and a process error signal is sent to the responsible terminal.

[0043] By adopting the above technical solution, the injection flow rate of the processing technology can be adjusted according to the difference between the current contour surface curvature and the standard contour surface curvature, and it can be determined whether the decorative strips obtained by executing the adjusted injection flow rate meet the standards, thereby realizing automatic adjustment of the processing technology.

[0044] Optionally, when the curvature of the current contour surface of the second three-dimensional model is greater than the curvature of the standard contour surface of the second standard model, the thickness difference of the decorative strip to be measured is calculated according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface;

[0045] The increase ratio is determined according to the thickness difference of the decorative strip to be tested, and the increase ratio is positively correlated with the thickness difference of the decorative strip to be tested;

[0046] Increase the injection flow rate of the processing technology according to the increase ratio;

[0047] When the curvature of the current contour surface of the second three-dimensional model is less than the curvature of the standard contour surface of the second standard model, the thickness difference of the decorative strip to be tested is calculated according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface;

[0048] Determine the reduction ratio according to the thickness difference of the decorative strip to be tested, and the reduction ratio is positively correlated with the thickness difference of the decorative strip to be tested;

[0049] According to the reduction ratio, reduce the injection flow rate of the processing technology.

[0050] By adopting the above technical solution, according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface, it is selected to increase or decrease the injection flow rate of the processing technology, so that the decorative strips produced by the processing technology can meet the design requirements.

[0051] Optionally, obtain the ambient temperature and humidity of the processing technology;

[0052] According to the preset influence degree values ​​of injection flow measured in different ambient temperature ranges and ambient humidity ranges, the influence value of injection flow rate affected by external ambient temperature and humidity is analyzed and determined;

[0053] Analyze and determine the flow control adjustment value based on the corresponding relationship between the injection flow data source and the flow control adjustment value;

[0054] According to the influence value of the injection flow rate by the ambient temperature and the ambient humidity and the flow control adjustment value determined by analysis, the environmental adjustment value of the injection flow rate is analyzed and obtained.

[0055] By adopting the above technical scheme, the flow control adjustment value can be first analyzed and determined based on the ambient temperature and humidity as well as the impact of the ambient temperature and humidity on the injection flow, and the environmental adjustment value of the injection flow can be further obtained, so that the processing technology can change with the changes in the external environment, thereby improving the quality and dimensional accuracy of the decorative strips.

[0056] In a second aspect, the present application provides a trim strip detection system based on three-dimensional modeling, which adopts the following technical solution:

[0057] A trim strip detection system based on three-dimensional modeling, comprising:

[0058] An acquisition module, used to acquire a first standard model, a first preset error, a second standard model, a second preset error, a process parameter, a first distance, a second distance, a third distance, a fourth distance, an ambient temperature, and an ambient humidity;

[0059] A memory, used to store a program of any one of the above-mentioned trim strip detection methods based on three-dimensional modeling;

[0060] The program in the processor memory can be loaded and executed by the processor to implement any of the above-mentioned trim detection methods based on three-dimensional modeling.

[0061] By adopting the above technical solution, the trim strips in the uninstalled state and the installed state are scanned, and the three-dimensional models of the trim strips in the two states are obtained. The three-dimensional model is compared with the corresponding standard model to obtain a quantifiable surface profile to represent the quality of the trim strip. This method enables the quality of the trim strip to have quantifiable objective standard parameters, and does not need to be determined by manual subjective judgment, so the quality judgment of the trim strip is more accurate.

[0062] In a third aspect, the present application provides a smart terminal, which adopts the following technical solution:

[0063] An intelligent terminal comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and execute any one of the above methods.

[0064] In a fourth aspect, the present application provides a computer storage medium capable of storing a corresponding program, which is convenient for accurately detecting the size of a decorative strip, and adopts the following technical solution:

[0065] A computer-readable storage medium stores a computer program that can be loaded by a processor and execute any of the above-mentioned trim strip detection methods based on three-dimensional modeling.

[0066] In summary, the present application includes at least one of the following beneficial technical effects:

[0067] Scan the trim strips in the uninstalled state and the installed state, and obtain the 3D models of the trim strips in both states. Compare the 3D model with the corresponding standard model to obtain a quantifiable surface profile to represent the quality of the trim strips. This method allows the quality of the trim strips to have quantifiable objective standard parameters, and does not need to be determined through manual subjective judgment, making the quality judgment of the trim strips more accurate;

[0068] On the premise of setting the reference point, the edge area of ​​the trim to be measured is scanned first, so that the size of the edge area of ​​the second 3D model is more accurate and closer to the actual size of the trim to be measured;

[0069] The injection flow rate of the processing technology can be adjusted according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface, and it can be judged whether the decorative strips obtained by executing the adjusted injection flow rate meet the standards, thereby realizing automatic adjustment of the processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 It is a schematic diagram of a trim detection system based on three-dimensional modeling provided in an embodiment of the present application.

[0071] Figure 2 It is a flow chart of a trim detection method based on three-dimensional modeling provided in an embodiment of the present application.

[0072] Figure 3 This is a schematic diagram of a process of scanning a trim strip based on three-dimensional modeling provided in an embodiment of the present application. Figure 1 .

[0073] Figure 4 This is a schematic diagram of a process of scanning a trim strip based on three-dimensional modeling provided in an embodiment of the present application. Figure 2 .

[0074] Figure 5 It is a flow chart of a method for detecting through holes of trim strips based on three-dimensional modeling provided in an embodiment of the present application.

[0075] Figure 6 This is a schematic diagram of a method for adjusting an injection molding process provided in an embodiment of the present application. Figure 1 .

[0076] Figure 7 This is a schematic diagram of a method for adjusting an injection molding process provided in an embodiment of the present application. Figure 2 .

[0077] Figure 8 This is a schematic diagram of a method for adjusting an injection molding process provided in an embodiment of the present application. Figure 3 .

[0078] Fig. 9It is a schematic diagram of a trim scanning system based on three-dimensional modeling provided in an embodiment of the present application. DETAILED DESCRIPTION

[0079] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-9 It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0080] The present application embodiment discloses a trim strip detection system based on three-dimensional modeling. Figure 1 The device includes a processing device 1, a decorative strip to be measured 2, a flexible measuring bracket 3, a scanning device 4 and a computer device 5.

[0081] The processing equipment 1 is used for processing and manufacturing the decorative strip. Optionally, the material of the decorative strip is at least one of plastic, metal, rubber and composite material. Taking the material of the decorative strip as plastic as an example, the processing technology of the processing equipment 1 includes but is not limited to at least one of injection molding technology, extrusion technology, molding technology, cutting technology and surface treatment technology.

[0082] The tested decorative strip 2 is any decorative strip produced by the processing equipment 1. Exemplarily, the tested decorative strip 2 is used for batch testing of decorative strips. For example, when performing batch quality testing on the decorative strips produced by the processing equipment 1, the tested decorative strip 2 can be randomly selected from a batch of decorative strips to represent the batch of decorative strips.

[0083] The flexible measurement bracket 3 is used to simulate the installation environment of the decorative strip. The flexible measurement bracket 3 can change its structure according to the shape, size and other parameters of the decorative strip. In an optional embodiment, the flexible measurement bracket 3 is composed of a base plate and detachable components, and the installation environment of the flexible measurement bracket 3 can be simulated by changing the type, quantity and position of the detachable components on the base plate.

[0084] The scanning device 4 is used to scan the outer contour of the decorative strip to be tested to obtain a three-dimensional model of the decorative strip to be tested. Exemplarily, the scanning device 4 is a three-dimensional scanner, a laser radar, or a depth camera. For example, if the scanning device 4 is a three-dimensional scanner, the three-dimensional scanner can emit laser light to the surface of the decorative strip 2 to be tested, and the camera or sensor configured in the three-dimensional scanner can capture the laser light returned by the decorative strip 2 to obtain the surface information of the decorative strip 2 to be tested.

[0085] The computer device 5 is used to control other devices in the trim detection system based on three-dimensional modeling. The computer device 5 and other devices are connected by wire or wirelessly. For example, the computer device 5 can send a scanning control instruction to the scanning device 4 to change the scanning position of the scanning device 4. For example, the computer device 5 can send a parameter change instruction to change the processing parameters of the processing device 1.

[0086] The present application embodiment discloses a decorative strip detection method based on three-dimensional modeling. Figure 2 , the method comprising:

[0087] Step S21: Scan the outer contour of the decorative strip to be tested to obtain a first three-dimensional model of the decorative strip to be tested.

[0088] The first three-dimensional model is a three-dimensional model of the trim strip to be tested in an uninstalled state.

[0089] In this application, in addition to detecting decorative strips, it is also possible to detect letter plates, signs, decorative panels, etc.

[0090] Exemplarily, a three-dimensional scanner is used to scan the outer contour of the decorative strip to be tested to obtain point cloud data of the decorative strip to be tested in an uninstalled state; and a first three-dimensional model of the decorative strip to be tested is established using the point cloud data.

[0091] Step S22: Calculate and obtain a first surface profile error between the first three-dimensional model and the first standard model, where the first standard model is used to record a standard size of the trim strip in an uninstalled state.

[0092] The first surface profile refers to the degree of deviation of the surface shape of the first three-dimensional model relative to the surface shape of the second standard model. The first surface profile may indicate the dimensional deviation of the tested trim strip relative to the ideal trim strip in an uninstalled state.

[0093] Exemplarily, the first three-dimensional model and the first standard model are placed in the same coordinate system; the maximum deviation distance of each surface on the first three-dimensional model relative to the first standard model is calculated with reference to the reference position on the first three-dimensional model and the second standard model, and the first surface profile error is obtained. The reference position may be an end point, a vertex or a boundary point on the trim to be measured. Therefore, the number of errors contained in the first surface profile error is related to the number of surfaces of the trim to be measured.

[0094] Step S23: if the first surface profile error is less than the first preset error, the decorative strip to be tested is installed on a flexible measuring bracket, the flexible measuring bracket is used to simulate the installation environment of the decorative strip, and the flexible measuring bracket exposes the installation surface of the decorative strip to be tested.

[0095] The first preset error is a preset constant. For example, the first preset error is set to ±0.2 mm.

[0096] If the first surface profile error is less than the first preset error, it means that there is a large deviation in the size of the decorative strip to be measured, and the process parameters of the processing technology of the decorative strip to be measured need to be adjusted.

[0097] Step S24: Scan the outer contour of the decorative strip to be tested to obtain a second three-dimensional model of the decorative strip to be tested.

[0098] The second three-dimensional model is a three-dimensional model of the trim strip to be tested in an installed state.

[0099] Exemplarily, a three-dimensional scanner is used to scan the outer contour of the decorative strip to be tested to obtain point cloud data of the decorative strip to be tested in an installed state; and a second three-dimensional model of the decorative strip to be tested is established using the point cloud data.

[0100] Step S25: Calculate the second surface profile error between the second three-dimensional model and the second standard model, where the second standard model is used to record the standard size of the decorative strip in the installed state.

[0101] The second surface profile records the maximum deviation between the second three-dimensional model and the second standard model. The second surface profile can represent the dimensional deviation of the tested decorative strip relative to the ideal decorative strip in the installed state.

[0102] The process of calculating the second surface profile error is similar to the process of calculating the first surface profile error, which will not be repeated here. For details, please refer to step S22.

[0103] Step S26: If the second surface profile error is greater than the second preset error, adjusting the process parameters of the processing technology of the decorative strip to be tested according to the second surface profile error.

[0104] The second preset error is a preset constant. For example, the second preset error is set to ±0.2 mm.

[0105] When the second surface contour is greater than the second preset error, it indicates that there is a large deviation in the size of the decorative strip to be measured, and the process parameters of the processing technology of the decorative strip to be measured need to be adjusted.

[0106] In summary, the trim strips in the uninstalled state and the installed state are scanned, and the three-dimensional models of the trim strips in the two states are obtained. The three-dimensional model is compared with the corresponding standard model to obtain a quantifiable surface profile to represent the quality of the trim strips. This method enables the quality of the trim strips to have quantifiable objective standard parameters, and does not need to be determined through manual subjective judgment, so the quality judgment of the trim strips is more accurate.

[0107] In the following embodiments, the size of the decorative strips is generally small, and the thickness of the edge area of ​​the decorative strips is small, so that the scanning device is prone to missing information of the edge area when scanning the decorative strips to be tested. Therefore, the embodiment of the present application discloses a decorative strip scanning method based on three-dimensional modeling. Figure 3 , the method comprising:

[0108] Step S301: setting a reference point on the flexible measuring bracket according to the installation method of the trim to be measured.

[0109] The installation methods of the tested trim strips include slot installation, nail installation and screw fixing installation.

[0110] Optionally, the reference point is an object that is easily detectable by the scanning device.

[0111] Exemplarily, when the trim strip to be tested is slot-mounted, the reference point may be set at an end point of the slot.

[0112] Exemplarily, in the case where the trim to be tested is installed by nails, the reference point may be set at the through hole of the nails.

[0113] For example, when the trim strip to be tested is installed by screws, the reference point can be set in the hole corresponding to the screw.

[0114] Step S302: starting from the reference point, scanning is preferentially performed along the edge area of ​​the decorative strip to be measured to obtain line edge features of the decorative strip to be measured.

[0115] The line edge feature is used to represent the structure and size of the edge of the trim to be measured on the physical structure.

[0116] Step S303: Scan the trim strip to be tested to obtain an initial three-dimensional model of the trim strip to be tested.

[0117] The initial three-dimensional model refers to a three-dimensional model obtained by directly scanning the trim to be tested.

[0118] Step S304: combining line edge features, updating the initial three-dimensional model to obtain a second three-dimensional model.

[0119] Exemplarily, model parameters of edge areas in an initial three-dimensional model are obtained; the aforementioned model parameters are updated using line edge features, wherein the updating method includes data replacement and data fusion; and the updated model parameters are applied to the initial three-dimensional model to obtain a second three-dimensional model.

[0120] In summary, under the premise of setting the reference point, the edge area of ​​the trim to be measured is scanned preferentially, so that the size of the edge area of ​​the second 3D model is more accurate and closer to the actual size of the trim to be measured.

[0121] In the following embodiment, when the scanning device is a 3D scanner, the line edge detection capability of the 3D scanner is limited, and it is difficult to directly detect the line edge data of the decorative strip. Therefore, the embodiment of the present application discloses a second decorative strip scanning method based on 3D modeling. Figure 4 , the method comprising:

[0122] Step S401: when the edge area of ​​the decorative strip to be measured is an inclined surface, a first distance from the scanning device to the edge area is obtained.

[0123] Exemplarily, an emission timestamp of light emitted by the scanning device and a reception timestamp of light reflected by the trim to be measured received by the scanning device are obtained; and the first distance is obtained according to the difference between the reception timestamp and the emission timestamp.

[0124] Step S402: controlling the scanning device to move in a direction perpendicular to the edge of the decorative strip to be measured.

[0125] Exemplarily, when the scanning device moves in a direction perpendicular to the edge of the decorative strip to be measured, the scanning device moves toward the edge of the decorative strip to be measured along the shortest path.

[0126] Step S403: Acquire a second distance from the scanning device to the edge area.

[0127] The second distance is the shortest distance from the scanning device to the edge area after the scanning device is moved along a direction perpendicular to the edge of the decorative strip to be measured.

[0128] Step S404: Obtaining the slope of the edge area of ​​the decorative strip to be measured according to the first distance, the second distance and the moving distance of the scanning device.

[0129] Exemplarily, the difference between the first distance and the second distance is calculated to obtain the distance difference; and the slope of the inclined surface is obtained according to the ratio between the distance difference and the moving distance.

[0130] Step S405: Repeat the above four steps to obtain a slope set consisting of at least two slopes.

[0131] It should be noted that the slope obtained at this time only represents the slope of a part of the edge area, rather than the slope of the entire edge area, so the above steps S401 to S404 will be repeated to obtain a slope set consisting of at least two slopes.

[0132] The above four steps are repeated a preset number of times.

[0133] Step S406: determining whether the variance of adjacent slopes in the slope set is less than a preset variance.

[0134] If the variance of adjacent slopes in the slope set is less than the preset variance, executing steps S407 to S409;

[0135] If the variance of adjacent slopes in the slope slope set is not less than the preset variance, step S410 is executed.

[0136] Exemplarily, the preset variance may be 0.15.

[0137] Step S407: If yes, then calculate the average of the slopes in the slope slope set to obtain the predicted slope of the edge area.

[0138] If the variance of adjacent slopes in the slope slope set is less than the preset variance, it means that the slope flatness of the edge region is good, and the slope slope of the entire slope can be predicted using the known slope slopes.

[0139] The predicted slope is used to indicate the predicted value of the slope of the slope in the edge region.

[0140] Step S408: Obtaining the thickness distribution of the edge region according to the predicted slope and the width of the edge region.

[0141] The width of the edge area refers to the length of the edge area in the direction perpendicular to the edge. The width of the edge area is obtained according to the design standard of the trim to be tested.

[0142] In some embodiments, the scanning device is controlled to move in a direction parallel to the edge to obtain the predicted slopes of several different positions in the edge region. According to the predicted slopes of several different positions and the width of the edge region, the thickness distribution of different positions on the edge region is obtained.

[0143] Step S409: generating a test result of the trim strip to be tested according to the thickness distribution and the preset thickness distribution.

[0144] The preset thickness distribution refers to the thickness distribution of the tested trim that meets the design standards. The test results include the thickness distribution of the edge area and the evaluation of the thickness distribution. Exemplarily, the thickness distribution is for several different positions, and the number of first positions that meet the preset thickness distribution and the number of second positions that do not meet the preset thickness distribution are determined. When the number of second positions is greater than the number of preset positions, the evaluation of the thickness distribution is set to unqualified; when the number of second positions is not greater than the number of preset positions, the evaluation of the thickness distribution is set to qualified; the thickness distribution, the number of first positions, the number of second positions, and the evaluation of the thickness distribution are written into the test results.

[0145] Furthermore, the test results are saved in a local storage and sent to a responsible person's terminal.

[0146] Exemplarily, when the evaluation of the thickness distribution is unqualified, the process parameters of the processing technology of the decorative strip to be tested are adjusted according to the thickness distribution.

[0147] Step S410: If not, adjusting the process parameters of the processing technology of the tested decorative strip according to the variance.

[0148] When the variance of adjacent slopes in the slope set is not less than the preset variance, it indicates that the slope of the decorative strip is uneven. Optionally, the variance and the test result are sent to the responsible terminal; and the process parameters of the processing technology of the decorative strip to be tested are adjusted according to the data returned by the responsible terminal.

[0149] In summary, when there is an inclined surface at the edge of the tested decorative strip, the thickness distribution of the tested decorative strip in the edge can be predicted by the slope of the inclined surface, and the detection result of the tested decorative strip can be determined based on the thickness distribution. Even if the thickness of the edge area is less than the minimum value of the scanning device, the thickness of the edge area can be predicted through this technical solution to determine whether the thickness of the edge area meets the requirements.

[0150] In the following embodiments, when there is a through hole on the trim to be tested and the diameter of the through hole is small, it is difficult for the scanning device to detect the actual diameter of the through hole and the structure inside the through hole. Therefore, the embodiment of the present application discloses a trim through hole detection method based on three-dimensional modeling. Figure 5 , the method comprising:

[0151] Step S501: When there is a through hole in the edge area and the diameter of the through hole is smaller than a preset length, control the scanning device to irradiate the through hole.

[0152] Exemplarily, the preset length is 3 mm. When the diameter of the through hole is less than 3 mm, it is difficult for the 3D scanner to obtain the accurate value of the through hole diameter and the situation inside the through hole.

[0153] Optionally, the scanning device uses a blue light scanner in a three-dimensional scanner, which emits blue light to the trim to be tested and captures the blue light returned by the trim to be tested through a camera or a sensor to obtain information about the surface of the trim to be tested.

[0154] Exemplarily, taking the case where the through hole is perpendicular to the surface of the decorative strip to be tested as an example, the scanning device is controlled to irradiate the through hole in a direction perpendicular to the surface of the decorative strip to be tested.

[0155] Step S502: collecting the actual light spot on the imaging plane. The actual light spot is formed on the imaging plane after the light emitted by the scanning device passes through the through hole.

[0156] The imaging plane is used to receive the light emitted by the scanning device after passing through the through hole. Exemplarily, the trim detection device is also provided with a camera, which can collect the actual light spot through the camera to obtain the shape and size of the actual light spot.

[0157] Step S503: obtaining a third distance between the scanning device and the trim to be measured.

[0158] Exemplarily, an emission timestamp of light emitted by the scanning device and a reception timestamp of light reflected by the trim to be measured received by the scanning device are obtained; and a third distance is obtained according to a difference between the reception timestamp and the emission timestamp.

[0159] Step S504: obtaining a fourth distance from the trim to be measured to the imaging plane.

[0160] Exemplarily, a position sensor is installed on the imaging plane, and the position sensor is used to obtain the distance between the imaging plane and other objects.

[0161] Step S505: Calculate a preset light spot corresponding to the through hole according to the third distance, the fourth distance and the second standard model.

[0162] Since in actual scenarios, the wavelength of light from the scanning device is much smaller than the diameter of the through hole, the effect of the diffraction effect of light can be ignored. Taking the through hole as an example, let the third distance be u, the fourth distance be v, and the through hole diameter in the second standard model be D, then the diameter of the preset light spot is d=(D*v) / (u+v).

[0163] Step S506: If the shape difference between the actual light spot and the preset light spot is greater than the preset shape difference, adjusting the process parameters of the punching process of the decorative strip to be tested according to the shape of the actual light spot.

[0164] The shape difference between the actual light spot and the preset light plate includes size difference and pattern difference. Taking the circular through hole as an example, for the size difference, it is necessary to compare the diameter difference between the actual light spot and the preset light spot. If the diameter difference is greater than the preset diameter difference, it means that the diameter of the through hole is too large and the through hole of the decorative strip does not meet the design requirements; for the pattern difference, it is necessary to compare whether the graphics of the actual light spot and the preset light spot are the same. If the graphics of the two are different, it means that the shape of the through hole does not meet the design requirements, or there is an abnormal protrusion inside the through hole. When the diameter difference is less than the preset diameter difference and the graphics of the actual light spot and the preset light spot are the same, it can be considered that the through hole meets the design requirements.

[0165] In another embodiment, if the shape difference between the actual light spot and the preset light spot is smaller than the preset shape difference, it means that the through hole meets the design requirements and other subsequent processing can be performed.

[0166] In summary, the actual light spot passing through the through hole is compared with the calculated preset light spot to determine whether the shape and size of the through hole meet the standard.

[0167] In the following implementation, if the surface profile error determines that the tested decorative strip does not meet the design requirements, the process parameters of the processing technology of the tested decorative strip are adjusted according to the second surface profile error to achieve automatic error correction of the processing technology. Therefore, the embodiment of the present application discloses a method for adjusting the injection molding process. Figure 6 , the method comprising:

[0168] Step S601: Determine whether a processing device for the trim strip to be tested has a system error.

[0169] If there is a system error in the processing equipment of the trim strip to be tested, step S602 is executed;

[0170] If there is no system error in the processing equipment of the tested decorative strip, steps S603 to S607 are executed.

[0171] Exemplarily, a system diagnostic tool of the processing equipment is started, and it is determined whether a system error occurs in the processing equipment of the trim strip to be tested based on the diagnostic result output by the system diagnostic tool.

[0172] Step S602: If yes, the processing equipment is suspended and an error message is sent to the terminal of the person in charge.

[0173] Exemplarily, the technician closest to the processing equipment is obtained through a camera, and the technician is set as the person in charge, and an error message is sent to the person in charge terminal corresponding to the person in charge.

[0174] Error messages are used to indicate that there are system errors in the processing equipment.

[0175] Step S603: If not, adjusting the injection flow rate of the processing technology according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface.

[0176] If there is no system error in the processing equipment of the tested trim strip, it means that the quality of the tested trim strip does not meet the design requirements due to incorrect parameters of the processing technology. Therefore, this step will adjust the injection flow rate of the processing technology.

[0177] The current contour surface curvature refers to the curvature of the contour surface on the trim strip to be tested in the installed state. The standard contour surface curvature refers to the curvature of the contour surface on the second standard model. The current contour surface curvature and the standard contour surface curvature correspond to the same contour surface.

[0178] Step S604: Obtain a comparison trim produced by the adjusted processing technology.

[0179] The comparison strip is the strip obtained after adjusting the injection flow rate of the process.

[0180] Step S605: Obtaining the third surface profile error corresponding to the comparison trim strip.

[0181] The steps to obtain the third surface profile error corresponding to the contrast trim can be referred to Figure 1 The embodiments shown will not be described in detail here.

[0182] Step S606: If the third surface profile error is less than the second preset error, the process parameters of the machining process are maintained, and a process adjustment signal is sent to the terminal of the person in charge.

[0183] If the third surface profile error is less than the second preset error, it means that the trim that meets the design requirements can be obtained by using the adjusted injection flow rate, so the process parameters of the processing technology need to be maintained.

[0184] The process adjustment signal includes the injection flow rate before adjustment and the injection flow rate after adjustment. The process adjustment signal is used to inform the person in charge that the injection flow rate has been adjusted and the trim produced by the processing equipment meets the design requirements.

[0185] Step S607: If the third surface profile error is greater than the second preset error, the process parameters of the machining process are adjusted according to the second surface profile error and the third surface profile error, and a process error signal is sent to the responsible terminal.

[0186] If the third surface profile error is greater than the second preset error, it means that the trim still does not meet the design requirements using the adjusted injection flow rate, and the process parameters of the processing technology can be further adjusted.

[0187] Process error information is used to inform the responsible person that the injection flow has been adjusted and the trim produced by the processing equipment does not meet the design requirements.

[0188] In summary, the injection flow rate of the processing technology can be adjusted according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface, and it can be judged whether the decorative strip obtained by executing the adjusted injection flow rate meets the standard, thereby realizing automatic adjustment of the processing technology.

[0189] In the following embodiment, an exemplary description is given of how to adjust the injection flow rate according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface. Figure 7 , the method comprising:

[0190] Step S701: when the curvature of the current contour surface of the second three-dimensional model is greater than the curvature of the standard contour surface of the second standard model, the thickness difference of the decorative strip to be measured is calculated according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface.

[0191] When the curvature of the current contour surface of the second three-dimensional model is greater than the curvature of the standard contour surface of the second standard model, the thickness difference of the decorative strip to be tested is smaller than the design requirement, and the decorative strip to be tested is more likely to be bent.

[0192] Exemplarily, the current thickness of the decorative strip to be measured is converted according to the curvature of the current contour surface; the standard thickness of the decorative strip to be measured is converted according to the curvature of the contour surface of the label; and the difference between the standard thickness and the current thickness is calculated to obtain the thickness difference.

[0193] Step S702: determining an increase ratio according to the thickness difference of the decorative strip to be tested, wherein the increase ratio is positively correlated with the thickness difference of the decorative strip to be tested.

[0194] Exemplarily, the increase ratio is determined in a preset first correspondence according to the thickness difference, wherein the preset first correspondence is generated according to the historical records of the processing equipment.

[0195] Step S703: increasing the injection flow rate of the processing technology according to the increase ratio.

[0196] Exemplarily, the increased injection flow rate is calculated according to the increase ratio; and the processing equipment is controlled to operate according to the increased injection flow rate.

[0197] Step S704: when the curvature of the current contour surface of the second three-dimensional model is less than the curvature of the standard contour surface of the second standard model, the thickness difference of the decorative strip to be tested is calculated according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface.

[0198] When the curvature of the current contour surface of the second three-dimensional model is smaller than the curvature of the standard contour surface of the second standard model, the thickness difference of the decorative strip to be tested is larger than the design requirement, and the decorative strip to be tested is less likely to be bent.

[0199] Exemplarily, the current thickness of the decorative strip to be measured is converted according to the curvature of the current contour surface; the standard thickness of the decorative strip to be measured is converted according to the curvature of the contour surface of the label; and the difference between the standard thickness and the current thickness is calculated to obtain the thickness difference.

[0200] Step S705: determining a reduction ratio according to the thickness difference of the decorative strip to be tested, wherein the reduction ratio is positively correlated with the thickness difference of the decorative strip to be tested.

[0201] Exemplarily, the increase ratio is determined in a preset second corresponding relationship according to the thickness difference, wherein the preset second corresponding relationship is generated according to the historical records of the processing equipment.

[0202] Step S706: reducing the injection flow rate of the processing technology according to the reduction ratio.

[0203] Exemplarily, the reduced injection flow rate is calculated according to the increase ratio; and the processing equipment is controlled to operate according to the reduced injection flow rate.

[0204] In summary, according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface, it is selected to increase or decrease the injection flow rate of the processing technology so that the decorative strips produced by the processing technology can meet the design requirements.

[0205] In the following embodiments, the processing technology of the decorative strip to be tested will also be affected by the ambient temperature and ambient humidity. Therefore, when adjusting the injection molding flow rate of the processing technology, the ambient temperature and ambient humidity need to be taken into consideration. The present application embodiment discloses a third method for adjusting the injection molding process. Figure 8 , the method comprising:

[0206] Step S801: Obtain the ambient temperature and humidity of the processing technology.

[0207] Exemplarily, the ambient temperature of the processing technology is obtained through a temperature sensor. Exemplarily, the ambient humidity of the processing technology is obtained through a humidity sensor.

[0208] Step S802: Analyze and determine the influence of the external environment temperature and humidity on the injection flow rate according to the preset influence degree values ​​of the injection flow rate measured in different environment temperature ranges and environment humidity ranges.

[0209] Exemplarily, based on the above-mentioned ambient temperature and humidity, the ambient temperature range and the humidity range within which the ambient temperature around the processing equipment falls are analyzed, and then based on the analyzed ambient temperature range and humidity range and the injection flow rate of the processing equipment as common query objects, the influence value of the injection flow rate affected by the external ambient temperature and humidity is queried from a preset database that stores the influence degree values ​​of the injection flow rate measured under different ambient temperature ranges and humidity ranges.

[0210] Step S803: Analyze and determine the flow control adjustment value according to the corresponding relationship between the data source of the injection flow and the flow control adjustment value.

[0211] Exemplarily, the data source of the injection flow rate is used as a query object, and the flow control adjustment value is obtained by querying from a preset database storing a correspondence between the data source and the flow control adjustment value.

[0212] Step S804: Analyze and obtain the environmental adjustment value of the injection flow rate according to the influence value of the injection flow rate affected by the ambient temperature and the ambient humidity and the flow control adjustment value determined by analysis.

[0213] Exemplarily, the sum of the value of the injection flow rate affected by the ambient temperature and the ambient humidity and the flow control adjustment value is calculated to obtain the environmental adjustment value of the injection flow rate.

[0214] Furthermore, after the environmental adjustment value is obtained, the injection flow rate of the processing equipment is adjusted according to the environmental adjustment value. For example, if the environmental adjustment value is -0.2 g / s, the injection flow rate of the processing equipment is reduced by 0.2 g / s according to the environmental adjustment value.

[0215] In summary, according to the ambient temperature and humidity as well as the impact of the ambient temperature and humidity on the injection flow, we can first analyze and determine the flow control adjustment value, and further obtain the environmental adjustment value of the injection flow, so that the processing technology can change with the changes in the external environment and improve the quality and dimensional accuracy of the trim.

[0216] Based on the same invention concept, please refer to Fig. 9 , the embodiment of the present application provides a trim strip detection system based on three-dimensional modeling, including:

[0217] An acquisition module 901 is used to acquire a first standard model, a first preset error, a second standard model, a second preset error, a process parameter, a first distance, a second distance, a third distance, a fourth distance, an ambient temperature, and an ambient humidity;

[0218] A memory 902, used to store a program of any one of the above-mentioned trim detection methods based on three-dimensional modeling;

[0219] Processor 903, the program in the memory can be loaded and executed by the processor to implement any of the above-mentioned trim detection methods based on three-dimensional modeling.

[0220] In summary, the above system will scan the trim strips in the uninstalled state and the installed state, and obtain the three-dimensional models of the trim strips in both states. The three-dimensional model is compared with the corresponding standard model to obtain a quantifiable surface profile to represent the quality of the trim strips. This method enables the quality of the trim strips to have quantifiable objective standard parameters, and does not need to determine the quality of the trim strips through manual subjective judgment, so the quality judgment of the trim strips is more accurate.

[0221] Those skilled in the art can clearly 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. The specific working process of the system, device and unit described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0222] An embodiment of the present application provides a computer-readable storage medium storing a computer program that can be loaded by a processor and execute a trim detection method based on three-dimensional modeling.

[0223] Computer storage media include, for example, various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0224] Based on the same inventive concept, an embodiment of the present application provides a smart terminal, including a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executes a trim detection method based on three-dimensional modeling.

[0225] Those skilled in the art can clearly 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. The specific working process of the system, device and unit described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0226] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A trim detection method based on three-dimensional modeling, characterized in that: The method comprises: Scanning the outer contour of the decorative strip to be tested to obtain a first three-dimensional model of the decorative strip to be tested; Calculating and obtaining a first surface profile error between the first three-dimensional model and a first standard model, wherein the first standard model is used to record a standard size of the trim strip in an uninstalled state; If the first surface profile error is less than a first preset error, installing the decorative strip to be measured on a flexible measuring bracket, wherein the flexible measuring bracket is used to simulate the installation environment of the decorative strip, and the flexible measuring bracket exposes the installation surface of the decorative strip to be measured; According to the installation method of the decorative strip to be measured, a reference point is set on the flexible measuring bracket; Taking the reference point as a starting point, scanning is performed along the edge area of ​​the decorative strip to be tested to obtain line edge features of the decorative strip to be tested; Scanning the decorative strip to be tested to obtain an initial three-dimensional model of the decorative strip to be tested; In combination with the line edge features, the initial three-dimensional model is updated to obtain a second three-dimensional model; Calculating a second surface profile error between the second three-dimensional model and a second standard model, the second standard model being used to record a standard size of the decorative strip in an installed state; If the second surface profile error is greater than a second preset error, adjusting the process parameters of the processing technology of the decorative strip to be tested according to the second surface profile error; Executing a first acquisition step, the first acquisition step comprising: acquiring a first distance from a scanning device to the edge area when the edge area of ​​the decorative strip to be measured is an inclined surface; Executing a moving step, the moving step comprising: controlling the scanning device to move in a direction perpendicular to the edge of the decorative strip to be measured; Executing a second acquisition step, the second acquisition step comprising: acquiring a second distance from the scanning device to the edge area; Executing a calculation step, the calculation step comprising: obtaining a slope of an inclined surface of an edge area of ​​the decorative strip to be measured according to the first distance, the second distance, and a moving distance of the scanning device; Repeating the first acquisition step, the moving step, the second acquisition step and the calculating step to obtain a slope set consisting of at least two slopes; Determining whether the variance of adjacent slopes of the slope set is less than a preset variance; If yes, then calculating the mean of the slopes in the slope set to obtain the predicted slope of the edge region; obtaining the thickness distribution of the edge region according to the predicted slope and the width of the edge region; and generating the detection result of the trim strip to be tested according to the thickness distribution and the preset thickness distribution; If not, the process parameters of the processing technology of the decorative strip to be tested are adjusted according to the variance.

2. The method for detecting decorative strips based on three-dimensional modeling according to claim 1, characterized in that: The method further comprises: When there is a through hole in the edge area and the diameter of the through hole is smaller than a preset length, controlling the scanning device to irradiate the through hole; Collecting an actual light spot on an imaging plane, where the actual light spot is formed on the imaging plane after the light emitted by the scanning device passes through the through hole; Acquiring a third distance from the scanning device to the decorative strip to be measured; Acquiring a fourth distance from the decorative strip to be measured to the imaging plane; Calculating a preset light spot corresponding to the through hole according to the third distance, the fourth distance and the second standard model; If the shape difference between the actual light spot and the preset light spot is greater than the preset shape difference, the process parameters of the punching process of the decorative strip to be tested are adjusted according to the shape of the actual light spot.

3. The method for detecting decorative strips based on three-dimensional modeling according to claim 1, characterized in that: The step of adjusting the process parameters of the processing technology of the decorative strip to be tested according to the profile error of the second surface includes: Determining whether there is a system error in the processing equipment of the tested trim strip; If yes, the processing equipment is suspended and an error message is sent to the terminal of the person in charge; If not, adjusting the injection flow rate of the processing technology according to the difference between the curvature of the current profile surface and the curvature of the standard profile surface; Obtaining contrast trim produced by the adjusted processing technology; Obtaining a third surface profile error corresponding to the comparison trim strip; If the third surface profile error is less than the second preset error, the process parameters of the machining process are maintained, and a process adjustment signal is sent to the responsible terminal; If the third surface profile error is greater than the second preset error, the process parameters of the machining process are adjusted according to the second surface profile error and the third surface profile error, and a process error signal is sent to the responsible terminal.

4. The method for detecting decorative strips based on three-dimensional modeling according to claim 3, characterized in that: The step of adjusting the injection flow rate of the processing technology according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface includes: When the curvature of the current contour surface of the second three-dimensional model is greater than the curvature of the standard contour surface of the second standard model, calculating the thickness difference of the decorative strip to be tested according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface; determining an increase ratio according to the thickness difference of the decorative strip to be tested, wherein the increase ratio is positively correlated with the thickness difference of the decorative strip to be tested; Increasing the injection flow rate of the processing technology according to the increase ratio; When the curvature of the current contour surface of the second three-dimensional model is less than the curvature of the standard contour surface of the second standard model, calculating the thickness difference of the decorative strip to be tested according to the difference between the curvature of the current contour surface and the curvature of the standard contour surface; determining a reduction ratio according to the thickness difference of the decorative strip to be tested, wherein the reduction ratio is positively correlated with the thickness difference of the decorative strip to be tested; According to the reduction ratio, the injection flow rate of the processing technology is reduced.

5. The method for detecting decorative strips based on three-dimensional modeling according to claim 3, characterized in that: The method further comprises: Obtaining the ambient temperature and humidity of the processing technology; According to the preset influence degree values ​​of the injection flow measured in different ambient temperature ranges and ambient humidity ranges, the influence value of the injection flow being affected by the ambient temperature and humidity is analyzed and determined; Analyze and determine the flow control adjustment value according to the corresponding relationship between the data source of the injection flow and the flow control adjustment value; According to the influence value of the injection flow rate by the ambient temperature and the ambient humidity and the flow control adjustment value determined by analysis, the environmental adjustment value of the injection flow rate is analyzed and obtained.

6. A trim detection system based on three-dimensional modeling, characterized in that: The system comprises: An acquisition module, used to acquire a first standard model, a first preset error, a second standard model, a second preset error, a process parameter, a first distance, a second distance, a third distance, a fourth distance, an ambient temperature, and an ambient humidity; A memory for storing a program of a trim strip detection method based on three-dimensional modeling as claimed in claim 5; The program in the memory can be loaded and executed by the processor to implement the trim detection method based on three-dimensional modeling as claimed in claim 5.

7. An intelligent terminal, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and executes any one of the methods of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: A computer program is stored which can be loaded by a processor and execute the method according to any one of claims 1 to 5.

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