A design method for customized pressure-relieving insoles for modular quick adaptation

Abstract

The present invention discloses a method for designing customized decompression insoles for modular rapid adaptation, comprising: S1, collecting sufficient plantar pressure data and foot shape structure data, and performing preprocessing to obtain a plantar thermal map and a standardized foot length; S2, position mapping the plantar thermal map with a universal foot bone upward-view image, and performing load mode division 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 force-bearing area contour and the central force-bearing area contour; S4, eliminating contour outliers, extracting the outer contours of the main force-bearing area and the central force-bearing area, and defining the main force-bearing module and the central force-bearing module; S5, scaling the main force-bearing module and the central force-bearing module according to different foot shapes and sizes to complete the design of the decompression insole. The present invention applies the plantar decompression module to a software system, and can achieve rapid and accurate adaptation of the design of functional decompression insoles.

Description

Technical Field

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

[0002] Personalized pressure-relieving insoles are functional products that combine human motion biomechanics, ergonomics, and advanced materials science. By precisely matching the insole with the user's foot pressure relief needs, they provide a scientifically effective, customized solution for foot health and footwear comfort. Personalized functional pressure-relieving insoles are suitable for a variety of groups, including ordinary consumers, athletes, and patients with special foot conditions. Due to their biomechanical regulatory effects, insoles have been introduced into foot treatment options. With rising living standards, the demand for footwear comfort and foot health management continues to increase across all demographics, placing higher demands on the scale of the personalized pressure-relieving insole industry.

[0003] Existing methods scan a specific user's insole to create a model, create an insole that matches the contours of their shoe, and redistribute plantar pressure by increasing the contact area at the foot-insole interface. Dynamic plantar pressure is then collected and the pressure on the primary stress-bearing areas of the forefoot and heel is reduced by increasing the cushioning distance at foot contact. This invention extracts the shape and position distribution characteristics of the primary stress-bearing areas in the dynamic plantar pressure image and processes the thickness of the corresponding areas of the model to improve plantar pressure dispersion in these areas.

[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 response to the above-mentioned deficiencies in the prior art, the present invention provides a method for designing customized decompression insoles for modular rapid adaptation to solve the technical problem of accurately identifying and locating key decompression areas on 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, the present invention adopts a technical solution: a method for designing a customized pressure-reducing insole for modular rapid adaptation, comprising:

[0007] S1. Collect sufficient plantar pressure data and foot shape data, and pre-process them to obtain a plantar thermal map and standardized foot length;

[0008] S2. Position mapping the plantar thermal map with the universal foot bone upward-view image, and performing load mode division to obtain a divided thermal map;

[0009] S3. scaling the divided thermal map according to the standardized foot length, and obtaining an overlapping image of the outline of the main force-bearing area and the outline of the central force-bearing area;

[0010] S4. Eliminate contour outliers, extract the outer contours of the main force-bearing area and the central force-bearing area, and define the main force-bearing module and the central force-bearing module;

[0011] S5. Scale the main force-bearing module and the central force-bearing module according to different foot shapes and sizes to complete the design of the pressure-reducing insole.

[0012] Furthermore: S1 includes:

[0013] S11. Collect sufficient plantar pressure data and extract the original plantar pressure heat map of the dominant foot;

[0014] S12, performing color quantization processing on the original thermal map to obtain a plantar thermal map;

[0015] 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.

[0016] Further: S2 includes:

[0017] S21. extracting a single foot skeleton model from the general gait skeleton model and determining mapping points;

[0018] S22. Using the metatarsophalangeal joint of the single foot skeletal model as the origin, connect the five metatarsophalangeal joints as the baseline according to the principles of foot anatomy.

[0019] S23, performing a longitudinal mirror flip on the single bone model of the foot, and mapping the flipped bone model to the heat map;

[0020] S24. Divide the plantar thermal map into different metatarsophalangeal region load modes according to the baseline to obtain a divided thermal map.

[0021] Furthermore: S3 includes:

[0022] S31, establishing a two-dimensional coordinate axis, and placing the divided heat map on the coordinate axis;

[0023] S32, taking the midpoint of the heel of each divided heat map as the center, and taking the center to the second toe convex point as the foot length direction, scaling the part aligned with the metatarsophalangeal convex point to obtain a scaled heat map;

[0024] S33, using an ellipse to outline the outline of the main stress area and the center stress area of ​​the scaled heat map;

[0025] S34. Repeat steps S32-S33 until the main force-bearing area contour image and the central force-bearing area contour image are completely concentrated, thereby obtaining an overlapping image of the main force-bearing area contour and the central force-bearing area contour.

[0026] Furthermore: S4 includes:

[0027] S41. Use image processing and statistical analysis methods to eliminate contour outliers;

[0028] S42, outlining the outer contours of the main force-bearing area and the central force-bearing area using ellipses according to the processed overlapping contour images;

[0029] S43. Extract the outer contours of the main force-bearing area and the central force-bearing area, locate the center point, major diameter, and minor diameter of the ellipse in the coordinate axis, and define the main force-bearing module and the central force-bearing module.

[0030] The beneficial effects of the present invention are:

[0031] 1. The plantar decompression module matching method of the present invention can be directly applied to software systems to achieve rapid and accurate adaptation of functional decompression insole designs;

[0032] 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

[0033] Figure 1 Flowchart of the design method for a customized pressure relief insole for modular quick fit.

[0034] Figure 2 This is a schematic diagram of the scaled heat map.

[0035] Figure 3 The outer contour of the main stress area and the central stress area is outlined using an ellipse.

[0036] Figure 4 This is the force area diagram after removing the contour outliers.

[0037] Figure 5 Schematic diagram of the outer contours of the main force-bearing area and the central force-bearing area.

[0038] Figure 6 It is the overlapping diagram of the outer contours of the main stress area and the central stress area.

[0039] Figure 7 Force area diagram for axis positioning. DETAILED DESCRIPTION

[0040] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0041] like Figure 1 As shown, in one embodiment of the present invention, a method for designing a customized pressure-reducing insole for modular quick adaptation is provided, comprising:

[0042] S1. Collect sufficient plantar pressure data and foot shape data, and pre-process them to obtain a plantar thermal map and standardized foot length;

[0043] S2. Position mapping the plantar thermal map with the universal foot bone upward-view image, and performing load mode division to obtain a divided thermal map;

[0044] S3. scaling the divided thermal map according to the standardized foot length, and obtaining an overlapping image of the outline of the main force-bearing area and the outline of the central force-bearing area;

[0045] S4. Eliminate contour outliers, extract the outer contours of the main force-bearing area and the central force-bearing area, and define the main force-bearing module and the central force-bearing module;

[0046] S5. Scale the main force-bearing module and the central force-bearing module according to different foot shapes and sizes to complete the design of the pressure-reducing insole.

[0047] S1 includes:

[0048] S11. Collect sufficient plantar pressure data and extract the original plantar pressure heat map of the dominant foot;

[0049] In this embodiment, by locating and matching the foot shape structure with the insole design elements (99% goodness of fit), a plantar decompression module (including main modules and submodules, some of which are mutually exclusive) with precise positioning along 16 two-dimensional coordinate axes is obtained. A total of 56 different plantar decompression area module combinations can be formed, forming 672 correction module combination solutions for different foot characteristics, covering the plantar decompression needs of more than 95% of the population. It can be applied to one-on-one pure customization scenarios, as well as semi-customization or batch industrial production.

[0050] S12, performing color quantization processing on the original thermal map to obtain a plantar thermal map;

[0051] Since the color distribution of heat maps varies, it is usually quantified into 8-16 colors to make the edges of the color blocks clear and easy to identify;

[0052] 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;

[0053] 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.

[0054] S2 includes:

[0055] S21. extracting a single foot skeleton model from the general gait skeleton model and determining mapping points;

[0056] S22. Using the metatarsophalangeal joint of the single foot skeletal model as the origin, connect the five metatarsophalangeal joints as the baseline according to the principles of foot anatomy.

[0057] S23, performing a longitudinal mirror flip on the single bone model of the foot, and mapping the flipped bone model to the heat map;

[0058] S24. Divide the plantar thermal map into different metatarsophalangeal region load modes according to the baseline to obtain a divided thermal map.

[0059] 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.

[0060] S3 includes:

[0061] S31, establishing a two-dimensional coordinate axis, and placing the divided heat map on the coordinate axis;

[0062] S32, taking the midpoint of the heel of each divided heat map as the center, and taking the center to the second toe convex point as the foot length direction, scaling the part aligned with the metatarsophalangeal convex point to obtain a scaled heat map;

[0063] The scaled heat map is as follows Figure 2 As shown;

[0064] S33. Use an ellipse to outline the outline of the main stress area and the center stress area of ​​the scaled heat map. The schematic diagram is as follows: Figure 3 As shown;

[0065] S34. Repeat steps S32-S33 until the main force-bearing area contour image and the central force-bearing area contour image are completely concentrated, thereby obtaining an overlapping image of the main force-bearing area contour and the central force-bearing area contour.

[0066] S4 includes:

[0067] 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;

[0068] S42. Based on the processed overlapping contour images, the outer contours of the main force-bearing area and the central force-bearing area are outlined using ellipses. The outer contours of the main force-bearing area and the central force-bearing area are shown in FIG. Figure 5 As shown;

[0069] S43, extract the outer contours of the main force-bearing area and the central force-bearing 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.

[0070] 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 pressure-reducing insole for modular quick adaptation, characterized in that: include: S1. Collect sufficient plantar pressure data and foot shape data, and pre-process them to obtain a plantar thermal map and standardized foot length; S2. Position mapping the plantar thermal map with the universal foot bone upward-view image, and performing load mode division 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 outline of the main force-bearing area and the outline of the central force-bearing area; S4. Eliminate contour outliers, extract the outer contours of the main force-bearing area and the central force-bearing area, and define the main force-bearing module and the central force-bearing module; S5. Scale the main force-bearing module and the central force-bearing module according to different foot shapes and sizes to complete the design of the pressure-reducing insole.

2. The method for designing a modular, quick-fitting, customized decompression insole according to claim 1, wherein: S1 includes: S11. Collect sufficient plantar pressure data and extract the original plantar pressure heat map of the dominant foot; S12, performing color quantization processing on the original thermal map to obtain a plantar thermal map; 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-fitting, customized decompression insole according to claim 1, wherein S2 include: S21. extracting a single foot skeleton model from the general gait skeleton model and determining mapping points; S22. Using the metatarsophalangeal joint of the single foot skeletal model as the origin, connect the five metatarsophalangeal joints as the baseline according to the principles of foot anatomy. 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 region load modes according to the baseline to obtain a divided thermal map.

4. The method for designing a modular, quick-fitting, customized decompression insole according to claim 1, wherein S3 include: S31, establishing a two-dimensional coordinate axis, and placing the divided heat map on the coordinate axis; S32, taking the midpoint of the heel of each divided heat map as the center, and taking the center to the second toe convex point as the foot length direction, scaling the part aligned with 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 heat map; S34. Repeat steps S32-S33 until the main force-bearing area contour image and the central force-bearing area contour image are completely concentrated, thereby obtaining an overlapping image of the main force-bearing area contour and the central force-bearing area contour.

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

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