Customer type pressure-reducing insole design method for modular rapid adaptation

Abstract

The invention discloses a design method of a customer system type decompression insole for modular rapid adaptation, which comprises the following steps: S1, acquiring sufficient plantar pressure data and foot type structure data, and preprocessing to obtain a plantar thermodynamic diagram and a standardized foot length; s2, performing position mapping on the sole thermodynamic diagram and the universal foot skeleton look-up position image, and performing load mode division to obtain a divided thermodynamic diagram; s3, scaling the divided thermodynamic diagram according to the standardized foot length, and obtaining an overlapped image of the main stress area contour and the central stress area contour; s4, removing contour abnormal values, extracting outer contours of the main stress area and the central stress area, and defining a main stress module and a central stress module; s5, the main stress module and the center stress module are zoomed according to different foot types and sizes, and design of the pressure reduction insole is completed. According to the method, the sole pressure reduction module is applied to a software system, and rapid and accurate adaptation of functional pressure reduction insole design can be achieved.

Description

Technical Field

[0001] The present application relates to the field of insole design, and in particular to a method for designing a customized decompression insole for modular quick adaptation. Background Art

[0002] Personalized decompression insoles are functional products that combine human sports biomechanics, ergonomics and advanced material science. They provide scientific and effective customized solutions for users' foot sports health and shoe comfort by accurately matching the insoles with the user's sole decompression needs. Personalized functional decompression insoles are suitable for a variety of groups, including ordinary consumers, athletes and patients with special foot diseases. Due to their biomechanical regulation effects, insoles have been introduced into the treatment of foot problems. With the improvement of living standards, the demand for shoe comfort and foot health management among various groups of people continues to increase, which also puts higher requirements on the industrialization scale of personalized decompression insoles.

[0003] The existing method obtains a model by scanning the insole of a specific user, makes an insole that matches the contour of the shoe, and redistributes the plantar pressure by increasing the contact area of ​​the foot-shoe insole interface; collects the dynamic plantar pressure, and reduces the pressure on the main stress-bearing areas of the forefoot and heel by increasing the foot contact cushioning distance. This invention extracts the shape and position distribution characteristics of the main stress-bearing areas of the dynamic plantar pressure image, processes the thickness of the corresponding area of ​​the model, and improves the plantar pressure dispersion effect in this area.

[0004] This method of one-to-one purely customized insoles requires the use of traditional manual production or 3D printing technology in actual production, which has high labor and time costs, and is not conducive to industrialized semi-customization and mass production, making it difficult to expand the scale in actual production. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a method for designing a customized decompression insole for modular rapid adaptation to solve the technical problem of accurately identifying and locating the key decompression areas of the sole of the foot, thereby realizing rapid modular matching of different sole load modes and achieving excellent personalized adaptive sole decompression effect.

[0006] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is: a method for designing a customized decompression insole for modular quick adaptation, comprising: S1, collecting sufficient plantar pressure data and foot shape structure data, and preprocessing them to obtain a plantar thermal map and standardized foot length; S2, mapping the plantar thermal map with the general foot bone upward-view image, and dividing the load mode to obtain a divided thermal map; S3, scaling the divided thermal map according to the standardized foot length, and obtaining an overlapping image of the main stress area contour and the central stress area contour; S4, remove contour abnormal values, extract the outer contours of the main stress-bearing area and the central stress-bearing area, and define the main stress-bearing module and the central stress-bearing module; S5. Scale the main force-bearing module and the central force-bearing module according to different foot sizes to complete the design of the pressure-reducing insole.

[0007] Further: S1 includes: S11, collecting sufficient plantar pressure data, and extracting the original plantar pressure thermal map of the dominant foot; S12, performing color quantization processing on the original thermal map to obtain a thermal map of the sole of the foot; S13. Collect sufficient foot shape structure data, and calculate the lower limit of the 95% confidence interval of the single sample distribution of the sufficient foot shape structure data as the standardized foot length.

[0008] Further: S2 includes: S21, extracting a single bone model of the foot from the general gait bone model, and determining the mapping point position; S22. Taking the metatarsophalangeal joint of the single bone model of the foot as the origin, according to the anatomical principles of the foot, connect the five metatarsophalangeal joints as the reference line; S23, performing a longitudinal mirror flip on the single bone model of the foot, and mapping the flipped bone model to the heat map; S24. Divide the plantar thermal map into different metatarsophalangeal area load modes according to the baseline to obtain a divided thermal map.

[0009] Further: S3 includes: S31, establishing a two-dimensional coordinate axis, and placing the divided heat map in the coordinate axis; S32, taking the midpoint of the heel of each divided heat map as the center, taking the center to the second toe convex point as the foot length direction, scaling the metatarsophalangeal convex point to obtain a scaled heat map; S33, using an ellipse to outline the outline of the main stress area and the center stress area of ​​the scaled thermal map; S34, repeating steps S32-S33 until the main force-bearing area contour image and the central force-bearing area contour image are completely concentrated, and obtaining an overlapping image of the main force-bearing area contour and the central force-bearing area contour.

[0010] Further: S4 includes: S41, using image processing and statistical analysis methods to eliminate contour outliers; S42, outlining the outer contours of the main stress-bearing area and the central stress-bearing area respectively using ellipses according to the processed overlapping contour images; S43, extracting the outer contours of the main force-bearing area and the central force-bearing area, positioning the center point, the major diameter, and the minor diameter of the ellipse in the coordinate axis, and defining the main force-bearing module and the central force-bearing module.

[0011] The beneficial effects of the present invention are: 1. The plantar decompression module matching method of the present invention can be directly applied to the software system to achieve rapid and accurate adaptation of the functional decompression insole design; 2. Based on statistical analysis of big data samples, it is highly scientific and reliable, and is suitable for large-scale production such as semi-customization and batch production. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Flowchart of a method for designing a customized pressure relief insole for modular quick fit.

[0013] Figure 2 This is a schematic diagram of the scaled heat map.

[0014] Figure 3 The outer contour diagram of the main stress area and the central stress area is outlined using an ellipse.

[0015] Figure 4 This is the force area diagram after removing the contour outliers.

[0016] Figure 5 It is a schematic diagram of the outer contours of the main stress-bearing area and the central stress-bearing area.

[0017] Figure 6 It is the coincidence diagram of the outer contours of the main stress area and the central stress area.

[0018] Figure 7 Force area diagram for axis positioning. DETAILED DESCRIPTION

[0019] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0020] like Figure 1 As shown, in one embodiment of the present invention, a method for designing a customized pressure relief insole for modular quick adaptation is provided, comprising: S1, collecting sufficient plantar pressure data and foot shape structure data, and preprocessing them to obtain a plantar thermal map and standardized foot length; S2, mapping the plantar thermal map with the general foot bone upward-view image, and dividing the load mode to obtain a divided thermal map; S3, scaling the divided thermal map according to the standardized foot length, and obtaining an overlapping image of the main stress area contour and the central stress area contour; S4, remove contour abnormal values, extract the outer contours of the main stress-bearing area and the central stress-bearing area, and define the main stress-bearing module and the central stress-bearing module; S5. Scale the main force-bearing module and the central force-bearing module according to different foot sizes to complete the design of the pressure-reducing insole.

[0021] S1 includes: S11, collecting sufficient plantar pressure data, and extracting the original plantar pressure thermal map of the dominant foot; In this embodiment, by positioning and matching the foot structure and the insole design elements (99% goodness of fit), a plantar decompression module (including main modules and submodules, which have mutually exclusive forms) with precise positioning of 16 two-dimensional coordinate axes is obtained, and a total of 56 different plantar decompression area module combinations can be formed, which can form 672 correction module combination schemes for different foot characteristics, covering the plantar decompression needs of more than 95% of the population, and can be applied to one-to-one pure customization scenarios, and can also be used in semi-customization or batch industrial production; S12, performing color quantization processing on the original thermal map to obtain a thermal map of the sole of the foot; Since the color distribution of heat maps varies, they are usually quantified into 8-16 colors to make the edges of the color blocks clear and easy to identify; S13, collecting sufficient foot structure data, and calculating the lower limit of the 95% confidence interval of the single sample distribution of the sufficient foot structure data as the standardized foot length; In this embodiment, the median foot length is 239.3 mm and the average is 241.1 mm, so the foot length of 240 mm is selected as the standardized foot length; the foot structure data results show that the length-to-width ratio of the foot structure is between 0.34 and 0.37, which fully meets the two-dimensional scaling conditions, so all thermal Figure 2 The dimensions are scaled to 240 mm foot length for standardization.

[0022] S2 includes: S21, extracting a single bone model of the foot from the general gait bone model, and determining the mapping point position; S22. Taking the metatarsophalangeal joint of the single bone model of the foot as the origin, according to the anatomical principles of the foot, connect the five metatarsophalangeal joints as the reference line; S23, performing a longitudinal mirror flip on the single bone model of the foot, and mapping the flipped bone model to the heat map; S24. Divide the plantar thermal map into different metatarsophalangeal area load modes according to the baseline to obtain a divided thermal map.

[0023] According to the anatomical structure of the foot and the principles of foot dynamics, the main force-bearing areas in the thermal map can be accurately divided into 14 types, including 1 type in the big toe area, 11 types in the forefoot area, and 1 type in the heel area. It is ensured that each type of thermal map data has no less than 100 cases to make it have extremely high statistical significance.

[0024] S3 includes: S31, establishing a two-dimensional coordinate axis, and placing the divided heat map in the coordinate axis; S32, taking the midpoint of the heel of each divided heat map as the center, taking the center to the second toe convex point as the foot length direction, scaling the metatarsophalangeal convex point to obtain a scaled heat map; The scaled heat map is as follows Figure 2 As shown; S33, use an ellipse to outline the outline of the main stress area and the center stress area of ​​the scaled heat map, as shown in the schematic diagram Figure 3 As shown; S34, repeating steps S32-S33 until the main force-bearing area contour image and the central force-bearing area contour image are completely concentrated, and obtaining an overlapping image of the main force-bearing area contour and the central force-bearing area contour.

[0025] S4 includes: S41, using image processing and statistical analysis methods to remove contour outliers, the image after removing contour outliers is as follows Figure 4 As shown; S42. Based on the processed overlapping contour images, the outer contours of the main stress-bearing area and the central stress-bearing area are outlined using ellipses. The outer contours of the main stress-bearing area and the central stress-bearing area are shown in FIG. Figure 5 As shown; S43, extract the outer contours of the main stress area and the central stress area, and the overlap diagram is as follows Figure 6 As shown, the center point, major diameter and minor diameter of the ellipse are positioned in the coordinate axis, and the main force module and the central force module are defined. The specific example is Figure 7 shown.

[0026] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for designing a customized decompression insole for modular quick adaptation, characterized in that: include: S1, collecting sufficient plantar pressure data and foot shape structure data, and preprocessing them to obtain a plantar thermal map and standardized foot length; S2, mapping the plantar thermal map with the general foot bone upward-view image, and dividing the load mode to obtain a divided thermal map; S3, scaling the divided thermal map according to the standardized foot length, and obtaining an overlapping image of the main stress area contour and the central stress area contour; S4, remove contour abnormal values, extract the outer contours of the main stress-bearing area and the central stress-bearing area, and define the main stress-bearing module and the central stress-bearing module; S5. Scale the main force-bearing module and the central force-bearing module according to different foot sizes to complete the design of the pressure-reducing insole.

2. The method for designing a customized decompression insole for modular quick adaptation according to claim 1, characterized in that: S1 includes: S11, collecting sufficient plantar pressure data, and extracting the original plantar pressure thermal map of the dominant foot; S12, performing color quantization processing on the original thermal map to obtain a thermal map of the sole of the foot; S13. Collect sufficient foot shape structure data, and calculate the lower limit of the 95% confidence interval of the single sample distribution of the sufficient foot shape structure data as the standardized foot length.

3. The method for designing a modular quick-fit custom decompression insole according to claim 1, characterized in that S2 include: S21, extracting a single bone model of the foot from the general gait bone model, and determining the mapping point position; S22. Taking the metatarsophalangeal joint of the single bone model of the foot as the origin, according to the anatomical principles of the foot, connect the five metatarsophalangeal joints as the reference line; S23, performing a longitudinal mirror flip on the single bone model of the foot, and mapping the flipped bone model to the heat map; S24. Divide the plantar thermal map into different metatarsophalangeal area load modes according to the baseline to obtain a divided thermal map.

4. The method for designing a modular quick-fit custom decompression insole according to claim 1, characterized in that S3 include: S31, establishing a two-dimensional coordinate axis, and placing the divided heat map in the coordinate axis; S32, taking the midpoint of the heel of each divided heat map as the center, taking the center to the second toe convex point as the foot length direction, scaling the metatarsophalangeal convex point to obtain a scaled heat map; S33, using an ellipse to outline the outline of the main stress area and the center stress area of ​​the scaled thermal map; S34, repeating steps S32-S33 until the main force-bearing area contour image and the central force-bearing area contour image are completely concentrated, and obtaining an overlapping image of the main force-bearing area contour and the central force-bearing area contour.

5. The method for designing a customized decompression insole for modular quick adaptation according to claim 1, characterized in that S4 include: S41, using image processing and statistical analysis methods to eliminate contour outliers; S42, outlining the outer contours of the main stress-bearing area and the central stress-bearing area respectively using ellipses according to the processed overlapping contour images; S43, extracting the outer contours of the main force-bearing area and the central force-bearing area, positioning the center point, the major diameter, and the minor diameter of the ellipse in the coordinate axis, and defining the main force-bearing module and the central force-bearing module.

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