CN105997318A - Method and system for fabricating personalized decompression insole aiming at foot shape of diabetic - Google Patents
Method and system for fabricating personalized decompression insole aiming at foot shape of diabetic Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 206010012601 diabetes mellitus Diseases 0.000 title claims abstract description 29
- 230000006837 decompression Effects 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 34
- 230000009467 reduction Effects 0.000 claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 15
- 230000003068 static effect Effects 0.000 claims abstract description 14
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- 238000010586 diagram Methods 0.000 claims description 20
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- 230000001603 reducing effect Effects 0.000 claims description 8
- 208000008960 Diabetic foot Diseases 0.000 claims description 7
- 230000002194 synthesizing effect Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 210000002683 foot Anatomy 0.000 description 82
- 238000012546 transfer Methods 0.000 description 36
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 208000025865 Ulcer Diseases 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 210000003371 toe Anatomy 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000005021 gait Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 210000000452 mid-foot Anatomy 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 2
- 231100000397 ulcer Toxicity 0.000 description 2
- 101150064813 ETT1 gene Proteins 0.000 description 1
- 208000003790 Foot Ulcer Diseases 0.000 description 1
- 206010061159 Foot deformity Diseases 0.000 description 1
- 206010020649 Hyperkeratosis Diseases 0.000 description 1
- 208000018262 Peripheral vascular disease Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000002266 amputation Methods 0.000 description 1
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- 210000000454 fifth toe Anatomy 0.000 description 1
- 210000000610 foot bone Anatomy 0.000 description 1
- 210000004744 fore-foot Anatomy 0.000 description 1
- 210000001255 hallux Anatomy 0.000 description 1
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- A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
- A61F5/01—Orthopaedic devices, e.g. splints, casts or braces
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/1036—Measuring load distribution, e.g. podologic studies
- A61B5/1038—Measuring plantar pressure during gait
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Abstract
The invention discloses a method and system for fabricating a personalized decompression insole aiming at a foot shape of a diabetic. The fabrication method comprises the steps that firstly, a three-dimensional model of a foot part of the diabetic formed when the patient stays still is acquired, a foot shape outline is extracted in the three-dimensional model and thus an insole outline plane graph can be determined; secondly, sole pressure data formed during the patient's motion is collected, and pressure intensity peak positions and high-pressure areas in the insole outline plane graph are determined according to the sole pressure data; and thirdly, pressure reduction processing is carried out to the high-pressure areas. The method for fabricating the personalized decompression insole aiming at the foot shape of the diabetic is characterized in that firstly, the three-dimensional model of the foot part formed when the patient stands still is acquired, so that the outline plane graph of the insole can be determined; secondly, the sole pressure data formed during the patient's motion is collected, and the pressure intensity peak positions and the high-pressure areas in the insole outline plane graph are determined; and finally, the pressure reduction processing is carried out to the high-pressure areas. Through static and dynamic processing, the insole aiming at the patient's foot shape can be obtained, and thus pressure reduction effects can be enhanced.
Description
Technical Field
The invention relates to the technical field of insole manufacturing, in particular to a method and a system for manufacturing a personalized pressure reduction insole for the foot shape of a diabetic patient.
Background
High pressure and long-term stress on the sole of the foot can cause pain to foot muscles, and if the foot is in such a state for a long time, if high-heeled shoes are worn for a long time, foot bones and muscles can deform, so that foot deformity can occur. For healthy people, high pressure or long-term stress conditions of the feet can lead to the generation of calluses in the feet; however, this condition is dangerous for the diabetic. The main danger comes from peripheral neuropathy and peripheral angiopathy of the foot of a diabetic patient, the peripheral neuropathy makes the patient not easy to feel high pressure, so that the stress mode cannot be actively adjusted, serious pressure injury can be caused, and ulcer can be caused; peripheral vascular lesions cause reduced blood flow to the foot, and prolonged compression, even low pressure compression, can cause ischemic injury and induce ulceration. Ulcers, as a complication of diabetic feet, are a significant cause of local amputation, and even death. Therefore, for the prevention of foot ulcers, decompression is one of the important approaches.
For the method of pressure reduction, the existing research proposes to use personalized custom insoles (Bus, s.a., Foot structure and Foot wear description in diabetes mellitis. diabetes Metab ResRev,2008.24Suppl 1: p.s90-5), and Bus et al (gummemond, n.a., et al, the effects of ingredient configurations on for effect plant compression and walking compatibility in diabetes biomedicines, 2007.22(1): p.81-87) to decompose the pressure reduction insole into: 2 kinds of bases, 2 kinds of heel cups, 3 kinds of waist cushion and 2 kinds of metatarsophalangeal cushion, and provides 12 kinds of pressure reduction insoles which are obtained by different combinations and matching of the bases, the heel cups, the waist cushion and the metatarsophalangeal cushion, and the optimal pressure reduction combination is obtained by carrying out pressure reduction tests on the 12 kinds of insoles.
However, the existing insoles are designed aiming at the foot shapes of the masses uniformly and cannot be different from person to person, and the foot shapes of diabetics change, so that the pressure reducing effect cannot be effectively achieved by using the existing insoles.
Disclosure of Invention
The invention aims to provide a method for manufacturing a personalized pressure reduction insole for the foot shape of a diabetic patient, which can be used for manufacturing the insole according to the foot shape of the user.
In order to achieve the purpose, the invention provides the following scheme:
a manufacturing method of a personalized pressure reduction insole aiming at the foot shape of a diabetic patient comprises the following steps: the method comprises the following steps: acquiring a three-dimensional model of a foot of a patient when the patient is static, and extracting a foot shape outline from the three-dimensional model to determine an insole outline plan; step two: acquiring sole pressure data of a patient in the movement process, and determining the pressure peak position and the high pressure area in the insole outline plan according to the sole pressure data; step three: and carrying out decompression treatment on the high-pressure area.
Optionally, the footprint profile comprises a plantar profile and a footprint profile; wherein, the extracting of the foot-shaped profile in the three-dimensional model specifically comprises: extracting a maximum contour from a top view of the three-dimensional model, wherein the maximum contour is a sole contour; determining a coordinate original point diagram according to the foot print stress area; and extracting a joint curve of the coordinate original point diagram and the three-dimensional model, wherein the joint curve is a footprint outline.
Optionally, the method of obtaining a three-dimensional model of a foot of a patient at rest comprises: using at least two groups of scanning units to acquire cross-sectional images of feet of a patient when the patient is static at mutually perpendicular angles and at a set scanning speed; all the collected foot cross-section images are fitted to form a three-dimensional model.
Optionally, the method for determining the position of the pressure peak includes: a plurality of pressure acquisition modules are arranged on a road at intervals; when a patient passes through the road at a set advancing speed, each pressure acquisition module acquires sole pressure data when contacting each part of the sole at a set frequency; synthesizing each frame of collected plantar pressure data into a dynamic foot shape image; partitioning the dynamic foot image, and determining the pressure generation time and the end time in each partition; determining a time range of a plantar pressure image having a maximum contact area according to the pressure occurrence time and the end time of each of the zones; selecting a frame of image with the largest contact area within the time range; determining the position of a pressure peak according to the maximum image of the contact area; the high-pressure area is a circular area with the position of the pressure peak value as the center of a circle and with a set radius.
Optionally, after selecting a frame of image with the largest contact area in the time range, the method further includes: and correcting the image with the largest contact area to obtain an effective pressure contact image.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention aims at the manufacturing method of the individualized decompression insole of the foot type of the diabetic, firstly, a three-dimensional model of the foot of the diabetic is obtained to determine a contour plan of the insole; secondly, collecting sole pressure data of a patient in the movement process to determine the position of a pressure peak value and a high-pressure area in an insole outline plane diagram; and finally, carrying out decompression treatment on the high-pressure area. Through static and dynamic treatment, the insole aiming at the foot shape of a patient can be obtained, and the effect of reducing pressure is improved.
The invention aims to provide a system for manufacturing a personalized pressure reduction insole for the foot shape of a diabetic patient, which can be used for manufacturing the insole according to the foot shape of the user.
In order to achieve the purpose, the invention provides the following scheme:
a system for manufacturing a personalized pressure reduction insole for a diabetic foot shape, the system comprising: the image acquisition module is used for acquiring a three-dimensional model of the foot of the patient when the patient is still; an extraction module for extracting a foot shape contour from the three-dimensional model to determine an insole contour plan; the pressure acquisition module is arranged on the road at intervals and used for acquiring plantar pressure data of a patient in the movement process when the patient passes through the road at a set advancing speed; the determining module is used for determining the position of a pressure peak value and a high-pressure area in the insole outline plan according to the sole pressure data; and the processing module is used for carrying out decompression processing on the high-pressure area.
Optionally, the footprint profile comprises a plantar profile and a footprint profile; the extraction module comprises: a first extraction unit, configured to extract a maximum contour from a top view of the three-dimensional model, where the maximum contour is a sole contour; and the second extraction unit is used for determining a coordinate original point diagram according to the footprint stress area and extracting a joint curve of the coordinate original point diagram and the three-dimensional model, wherein the joint curve is a footprint outline.
Optionally, the image acquisition module includes: the scanning units are used for acquiring cross-sectional images of the feet of a patient when the patient is static at mutually perpendicular angles and at a set scanning speed; and the fitting unit is used for fitting all the collected foot cross section images to form a three-dimensional model.
Optionally, the determining module includes: an image synthesis unit for synthesizing the plantar pressure data into a dynamic foot shape image; an image partitioning unit for partitioning the dynamic foot image to determine pressure occurrence time and end time in each partition; the image selecting unit is used for selecting a frame of image with the largest contact area in the time range; and the determining unit is used for determining the position of a pressure peak value according to the maximum contact area image, and taking the position of the pressure peak value as a circle center and a circular area with a set radius as a high-pressure area.
Optionally, the determining module includes: and the correcting unit is used for correcting the image with the largest contact area after selecting one frame of image with the largest contact area in the time range so as to obtain an effective pressure contact image.
Compared with the prior art, the manufacturing system of the foot type personalized pressure reduction insole for the diabetic is the same as the manufacturing method of the foot type personalized pressure reduction insole for the diabetic, and the details are not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flow chart of the manufacturing method of the personalized pressure reduction insole for the foot shape of the diabetic patient according to the invention;
FIG. 2 is a plan view of the outline of an insole of the present invention;
FIG. 3 is a partition diagram of a dynamic footprint image;
FIG. 4 is an effective pressure contact image;
fig. 5A-5D are pressure transfer patterns for the high pressure zone.
FIG. 6 is a schematic block diagram of a system for manufacturing a personalized pressure reduction insole for diabetic feet according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a method for manufacturing a personalized pressure reduction insole for the foot shape of a diabetic patient, which comprises the steps of firstly obtaining a three-dimensional model of the foot of the patient when the patient is static so as to determine a contour plan view of the insole; secondly, collecting sole pressure data of a patient in the movement process to determine the position of a pressure peak value and a high-pressure area in an insole outline plane diagram; and finally, carrying out decompression treatment on the high-pressure area. Through static and dynamic treatment, the insole aiming at the foot shape of a patient can be obtained, and the effect of reducing pressure is improved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in figure 1, the method for manufacturing the personalized pressure reduction insole aiming at the foot shape of the diabetic patient comprises the following steps: step 100: acquiring a three-dimensional model of a foot of a patient when the patient is static, and extracting a foot shape outline from the three-dimensional model to determine an insole outline plan; step 200: acquiring sole pressure data of a patient in the movement process, and determining the pressure peak position and the high pressure area in the insole outline plan according to the sole pressure data; step 300: and carrying out decompression treatment on the high-pressure area.
The footprint profile comprises a footprint profile 1 and a footprint profile 2 (shown in figure 2); the method for extracting the foot-shaped profile from the three-dimensional model specifically comprises the following steps: extracting a maximum contour from a top view of the three-dimensional model, wherein the maximum contour is a sole contour; determining a coordinate original point diagram according to the foot print stress area; and the coordinate original point diagram and the three-dimensional model are connected by a connecting curve, and the connecting curve is a footprint outline.
In step 100, the method of obtaining a three-dimensional model of a foot of a patient while at rest:
step 101: at least two groups of scanning units are used for acquiring cross-sectional images of the feet of the patient at a set scanning speed and at mutually perpendicular angles.
Step 102: all the collected foot cross-section images are fitted to form a three-dimensional model.
Wherein the scanning unit may be a laser scanner. In the present embodiment, the two laser scanners scan the cross-sectional foot images of the patient at rest at mutually perpendicular angles and at a scanning speed of 50HZ, and all the acquired cross-sectional foot images of the patient at rest are fitted to form a three-dimensional model.
In step 200, the method of determining the location of a pressure peak comprises:
step 201: a plurality of pressure acquisition modules are arranged on a road at intervals; step 202: when a patient passes through the road at a set advancing speed, each pressure acquisition module acquires sole pressure data when contacting each part of the sole at a set frequency; step 203: synthesizing the plantar pressure data into a dynamic foot shape image; step 204: partitioning the dynamic foot image, and determining the pressure generation time and the end time in each partition; step 205: determining a time range of a plantar pressure image having a maximum contact area according to the pressure occurrence time and the end time of each of the zones; step 206: selecting a frame of image with the largest contact area within the time range; step 207: and determining the position of a pressure peak according to the maximum image of the contact area, wherein the high-pressure area is a circular area with the position of the pressure peak as the center of a circle and with a set radius.
The pressure acquisition module is a pressure sensor, preferably a capacitance pressure sensor. Further, the size of the pressure sensor is 1cm x 1cm (namely, the contact area of the pressure sensor and the sole of the foot is 1 cm)2). In the embodiment, when a patient passes through the pressure sensor laid in the middle of the six-meter runway at a set advancing speed, the capacitive pressure sensor collects pressure signals at a frequency of at least 100HZ, an interaction force is generated between the sole and the capacitive pressure sensor, the force changes the current value of the capacitive pressure sensor, the difference between the front current value and the rear current value is screened and amplified through a certain signal, and sole pressure data of each part of the sole are finally obtained. The plantar pressure data reflected by all pressure sensors in contact with the foot constitute a dynamic foot shape image.
As shown in fig. 3, the dynamic foot shape image is defined by a partition according to the sole part: the foot is divided into 10 sections, which are: the thumb (hallux: T1), the second to fifth little toe (toe2-5: T2-5), the first to fifth metatarsophalangeal (1st to 5th mataratsal head: MTH1-5), the midfoot (midfoot: MF), the Medial Heel (MH) and the lateral heel (Lateral heel: LH); then, from the different site occurrence time (ST) and the End Time (ET), the marker events of the five foot gait are determined: heel contact (IC), forefoot contact (FFC), full sole contact (FF), heel lift off (HO), and toe lift off (TO). The mathematical formulas are respectively:
IC ═ Min (STMH, STLH) (equation 1);
FFC ═ Min (STMTH1, STMTH2, STMTH3, STMTH4, STMTH5) (equation 2);
FF ═ Max (ETMTH1, ETMTH2, ETMTH3, ETMTH4, ETMTH5) (equation 3);
HO Max (ETMH, ETLH) (formula 4);
TO, ETT1 (equation 5).
Based on the identification of the landmark events of five foot gaits, the time frame of the plantar pressure image with the largest contact area (i.e., the FF-to-HO phase) is determined, a frame of the contact area largest image is selected within the time frame, and the contact area largest image is analyzed to determine the location of the pressure peak. Further, after a frame of the image with the largest contact area is selected in the time range, the image with the largest contact area needs to be corrected to obtain an effective pressure contact image (as shown in fig. 4).
Wherein the correction method comprises the following steps: and deleting the point of the maximum contact area image, at which the pressure data is smaller than a first set pressure value. Wherein, the first set pressure value may be 5 Kpa.
In the present embodiment, the size of the sensor is 4 pieces and 1cm based on the pressure2Is determined where the pressure peak occurs and then set as a high pressure area with a peripheral 1cm radius area.
In step 300, the method for decompressing a high pressure region includes: step 301: calculating a pressure value of the high pressure region; step 302: judging whether the pressure value of the high-pressure area is greater than a second set pressure value or not, if so, performing hollow processing on the high-pressure area to form a plurality of through holes in the high-pressure area; otherwise, arranging a pressure transfer component at the periphery of the high-pressure area to ensure that the high-pressure area and the periphery jointly form a concave shape. In this embodiment, the second set pressure value is 200 Kpa.
For example, when the pressure value of the high-pressure area is greater than 200KPa, the high-pressure area is hollowed out, so that a plurality of through holes are formed in the high-pressure area. The diameter of the through hole is 1cm or 2 cm. And when the pressure value of the high-pressure area is less than 200KPa, arranging a pressure transfer component at the periphery of the high-pressure area to ensure that the high-pressure area and the periphery jointly form a concave shape. The pressure transfer component includes at least one of a waist pad, a metatarsophalangeal pad, and a heel pad.
The method for arranging the pressure transfer component at the periphery of the high-pressure area to enable the high-pressure area and the periphery to jointly form a concave shape comprises the following steps:
establishing a decompression scheme of the high-pressure area, namely setting a decompression target of each area; (first, the target of pressure reduction is set for each region, particularly the high-pressure region, for example, in the center of the palm, we reduce the impact value of 50 KPa)
Designing a roadmap for effective pressure dispersion in high pressure regions (e.g., which regions are capable of receiving 50KPa of impulse value requiring depressurization);
establishing a pressure transfer principle: setting a target decompression value; dividing the insole outline plan into hierarchical regions: the pressure transfer route is from two ends to the middle, namely a toe area-half sole, a half sole-middle foot and a heel-middle foot; meanwhile, in the same level region, the pressure transfer is uniform to the inner side and the outer side; force transfer within a level is superior to force transfer between levels (arrows indicate pressure transfer directions as shown in fig. 5 (a) - (D)). In the structural design, whether the scheme inside the hierarchy is complete is considered, and then the complementary effect between the hierarchies is considered.
When the pressure transfer member is provided: the position of the high-pressure area in each of the hierarchical regions is judged, and then the pressure transfer means is provided according to a transfer route of pressure. Wherein the insole is made of EVA (Ethylene Vinyl Acetate) with hardness of 60-75A.
The invention relates to a method for manufacturing a personalized pressure reduction insole for the foot shape of a diabetic patient, which has the advantages that:
the invention simultaneously considers the design of the proper size of the insole and the design of the high-pressure area pressure reducing structure aiming at the manufacturing method of the foot type personalized pressure reducing insole for the diabetic patients, so that the personalized pressure reducing insole meets the foot size characteristics and the pressure reducing requirements of the diabetic patients.
The invention aims at the manufacturing method of the individualized pressure reduction insole of the foot type of the diabetic patient, and the static foot type and the dynamic foot type are respectively obtained and extracted by applying the three-dimensional laser scanning technology and the pressure testing technology, the two methods replace the traditional foot type acquisition method, and the accuracy and the repeatability are high.
The invention provides a pressure transfer route aiming at a method for manufacturing the foot type personalized pressure reduction insole for the diabetic, and can rapidly manufacture the personalized pressure reduction insole for each diabetic foot patient.
In addition, the invention also provides a manufacturing system of the personalized pressure reduction insole aiming at the foot shape of the diabetic patient. As shown in fig. 6, the system for manufacturing the personalized pressure reduction insole for the foot shape of the diabetic patient comprises an image acquisition module 1, an extraction module 2, a pressure acquisition module 3, a determination module 4 and a processing module 5. The image acquisition module 1 acquires a three-dimensional model of a foot of a patient when the patient is static, the extraction module 2 extracts a foot shape outline from the three-dimensional model to determine an insole outline plan, the pressure acquisition modules 3 are arranged on a road at intervals, when the patient passes through the road at a set advancing speed, sole pressure data of the patient in the motion process are acquired, the determination module 4 determines the pressure peak position and a high-pressure area in the insole outline plan according to the sole pressure data, and the processing module 5 performs decompression processing on the high-pressure area.
The image acquisition module 1 comprises at least two groups of scanning units and fitting units, wherein the at least two groups of scanning units acquire cross-sectional images of feet of a patient when the patient is static at mutually perpendicular angles and at a set scanning speed; and the fitting unit fits all the collected foot cross section images to form a three-dimensional model. Wherein the scanning unit may be a laser scanner. In the present embodiment, the two laser scanners scan the cross-sectional foot images of the patient at rest at mutually perpendicular angles and at a scanning speed of 50HZ, and all the acquired cross-sectional foot images of the patient at rest are fitted to form a three-dimensional model.
The footprint profile includes a plantar profile and a footprint profile. The extraction module 2 comprises a first extraction unit and a second extraction unit, wherein the first extraction unit extracts a maximum contour from a top view of the three-dimensional model, and the maximum contour is a sole contour; the second extraction unit determines a coordinate original point diagram according to the footprint stress area, and extracts a connection curve of the coordinate original point diagram and the three-dimensional model, wherein the connection curve is a footprint outline.
The determining module 4 comprises an image synthesizing unit, an image partitioning unit, an image selecting unit and a determining unit. The image synthesis unit synthesizes each frame of collected plantar pressure data into a dynamic foot shape image, the image partitioning unit partitions the dynamic foot shape image to determine pressure generation time and ending time in each partition, the image selection unit selects a frame of maximum contact area image in the time range, the determination unit determines the position of a pressure peak value according to the maximum contact area image, and a circular area with the position of the pressure peak value as the center of a circle and a set radius is a high-pressure area.
The pressure acquisition module is a pressure sensor, preferably a capacitance pressure sensor. Further, the size of the pressure sensor is 1cm x 1cm (namely, the contact area of the pressure sensor and the sole of the foot is 1 cm)2). In the embodiment, when a patient passes through the pressure sensor laid in the middle of the six-meter runway at a set advancing speed, the capacitive pressure sensor collects pressure signals at a frequency of at least 100HZ, an interaction force is generated between the sole and the capacitive pressure sensor, the force changes the current value of the capacitive pressure sensor, the difference between the front current value and the rear current value is screened and amplified through a certain signal, and sole pressure data of each part of the sole are finally obtained. The plantar pressure data reflected by all pressure sensors in contact with the foot constitute a dynamic foot shape image.
Further, the determining module 4 further includes a correcting unit (not shown in the figure) for correcting the image with the largest contact area after selecting a frame of image with the largest contact area in the time range to obtain an effective pressure contact image. The correction method of the correction unit includes deleting a point where the pressure data is smaller than a first set pressure value in the image with the largest contact area. Wherein, the first set pressure value may be 5 Kpa.
Further, the high-pressure area is a circular area with the position of the pressure peak as a circle center and a set radius. In the present embodiment, the size of the sensor is 4 pieces and 1cm based on the pressure2Is determined where the pressure peak occurs and then set as a high pressure area with a peripheral 1cm radius area.
The processing module 5 comprises a calculating unit, a judging unit, a hollow processing unit and a pressure transfer unit, wherein the calculating unit calculates the pressure value of the high-pressure area; the judgment unit judges whether the pressure value of the high-pressure area is larger than a second set pressure value or not, and if so, the hollow processing unit carries out hollow processing on the high-pressure area to form a plurality of through holes in the high-pressure area; otherwise, the pressure transfer unit is provided with a pressure transfer component at the periphery of the high-pressure area, so that the high-pressure area and the periphery jointly form a concave shape. In this embodiment, the second set pressure value is 200 Kpa.
For example, when the pressure value of the high-pressure area is greater than 200KPa, the high-pressure area is hollowed out, so that a plurality of through holes are formed in the high-pressure area. The diameter of the through hole is 1cm or 2 cm. When the pressure value of the high-pressure area is less than 200KPa, arranging a pressure transfer component on the periphery of the high-pressure area to ensure that the high-pressure area and the periphery jointly form a concave shape. The pressure transfer component includes at least one of a waist pad, a metatarsophalangeal pad, and a heel pad.
The method for arranging the pressure transfer component at the periphery of the high-pressure area to enable the high-pressure area and the periphery to jointly form a concave shape comprises the following steps:
establishing a decompression scheme of the high-pressure area, namely setting a decompression target of each area; (first, the target of pressure reduction is set for each region, particularly the high-pressure region, for example, in the center of the palm, we reduce the impact value of 50 KPa)
Designing a roadmap for effective pressure dispersion in high pressure regions (e.g., which regions are capable of receiving 50KPa of impulse value requiring depressurization);
establishing a pressure transfer principle: setting a target decompression value;
dividing the insole outline plan into hierarchical regions: the pressure transfer route is from two ends to the middle, namely a toe area-half sole, a half sole-middle foot and a heel-middle foot; meanwhile, in the same level region, the pressure transfer is uniform to the inner side and the outer side; the force transfer within a hierarchy is superior to the force transfer between hierarchies (as shown in fig. 5A-5D, arrows indicate the direction of pressure transfer, and numbers in (c) indicate the remaining value of pressure after transfer). In the structural design, whether the scheme inside the hierarchy is complete is considered, and then the complementary effect between the hierarchies is considered. Fig. 5A is a schematic diagram of pressure before decompression of each region, fig. 5B is a schematic diagram of pressure transfer inside a level, fig. 5C is a schematic diagram of pressure transfer between adjacent levels, and fig. 5D is a schematic diagram of pressure transfer between spacer layers. Taking fig. 5B as an example, in level 2, the original middle pressure is-50 KPa, and the pressures on both sides of the middle part after transfer are respectively 25KPa and the middle pressure is 0 by performing pressure transfer inside the hierarchy.
When the pressure transfer member is provided: the position of the high-pressure area in each of the hierarchical regions is judged, and then the pressure transfer means is provided according to a transfer route of pressure. Wherein the insole is made of EVA (Ethylene Vinyl Acetate) with hardness of 60-75A.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A method for manufacturing a personalized pressure reduction insole aiming at the foot shape of a diabetic patient is characterized by comprising the following steps:
the method comprises the following steps: acquiring a three-dimensional model of a foot of a patient when the patient is static, and extracting a foot shape outline from the three-dimensional model to determine an insole outline plan;
step two: acquiring sole pressure data of a patient in the movement process, and determining the pressure peak position and the high pressure area in the insole outline plan according to the sole pressure data;
step three: and carrying out decompression treatment on the high-pressure area.
2. The method of making a personalized, pressure reducing insole for diabetic feet according to claim 1, wherein the foot shape profile comprises a plantar profile and a footprint profile; wherein,
the extracting of the foot-shaped profile from the three-dimensional model specifically comprises:
extracting a maximum contour from a top view of the three-dimensional model, wherein the maximum contour is a sole contour;
determining a coordinate original point diagram according to the foot print stress area;
and extracting a joint curve of the coordinate original point diagram and the three-dimensional model, wherein the joint curve is a footprint outline.
3. The method of making a personalized pressure relief insole for the diabetic foot according to claim 1, wherein the method of obtaining a three-dimensional model of the patient's foot at rest:
using at least two groups of scanning units to acquire cross-sectional images of feet of a patient when the patient is static at mutually perpendicular angles and at a set scanning speed;
all the collected foot cross-section images are fitted to form a three-dimensional model.
4. The method of claim 1 wherein the step of determining the location of the pressure peak comprises:
a plurality of pressure acquisition modules are arranged on a road at intervals;
when a patient passes through the road at a set advancing speed, each pressure acquisition module acquires sole pressure data when contacting each part of the sole at a set frequency;
synthesizing each frame of collected plantar pressure data into a dynamic foot shape image;
partitioning the dynamic foot image, and determining the pressure generation time and the end time in each partition;
determining a time range of a plantar pressure image having a maximum contact area according to the pressure occurrence time and the end time of each of the zones;
selecting a frame of image with the largest contact area within the time range;
determining the position of a pressure peak according to the maximum image of the contact area;
the high-pressure area is a circular area with the position of the pressure peak value as the center of a circle and with a set radius.
5. The method of claim 4, wherein after selecting a frame of the largest contact area image within the time frame, further comprising:
and correcting the image with the largest contact area to obtain an effective pressure contact image.
6. A manufacturing system using the manufacturing method of the personalized pressure reduction insole for diabetic foot shape according to any one of claims 1 to 5, the manufacturing system comprising:
the image acquisition module is used for acquiring a three-dimensional model of the foot of the patient when the patient is still;
an extraction module for extracting a foot shape contour from the three-dimensional model to determine an insole contour plan;
the pressure acquisition module is arranged on the road at intervals and used for acquiring plantar pressure data of a patient in the movement process when the patient passes through the road at a set advancing speed;
the determining module is used for determining the position of a pressure peak value and a high-pressure area in the insole outline plan according to the sole pressure data;
and the processing module is used for carrying out decompression processing on the high-pressure area.
7. The manufacturing system of claim 6, wherein the footprint profile includes a plantar profile and a footprint profile;
the extraction module comprises:
a first extraction unit, configured to extract a maximum contour from a top view of the three-dimensional model, where the maximum contour is a sole contour;
and the second extraction unit is used for determining a coordinate original point diagram according to the footprint stress area and extracting a joint curve of the coordinate original point diagram and the three-dimensional model, wherein the joint curve is a footprint outline.
8. The manufacturing system of claim 6, wherein the image acquisition module comprises:
the scanning units are used for acquiring cross-sectional images of the feet of a patient when the patient is static at mutually perpendicular angles and at a set scanning speed;
and the fitting unit is used for fitting all the collected foot cross section images to form a three-dimensional model.
9. The manufacturing system of claim 6, wherein the determining module comprises:
the image synthesis unit is used for synthesizing each frame of collected plantar pressure data into a dynamic foot shape image;
an image partitioning unit for partitioning the dynamic foot image to determine pressure occurrence time and end time in each partition;
the image selecting unit is used for selecting a frame of image with the largest contact area in the time range;
and the determining unit is used for determining the position of a pressure peak value according to the maximum contact area image, and taking the position of the pressure peak value as a circle center and a circular area with a set radius as a high-pressure area.
10. The manufacturing system of claim 9, wherein the determining module comprises:
and the correcting unit is used for correcting the image with the largest contact area after selecting one frame of image with the largest contact area in the time range so as to obtain an effective pressure contact image.
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| CN108630316A (en) * | 2018-05-08 | 2018-10-09 | 四川大学 | A kind of diabetes protection shoes adaptation method and system |
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| CN109820281A (en) * | 2019-03-01 | 2019-05-31 | 天津科技大学 | Personalized insole optimum design method based on diabetic foot's organisational level mechanical characteristic |
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| CN106626350A (en) * | 2016-12-09 | 2017-05-10 | 陕西科技大学 | Pressure reduction and protection insoles applying to high-risk diabetic foot groups and manufacturing method thereof |
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| CN112100853A (en) * | 2020-09-16 | 2020-12-18 | 河海大学常州校区 | Insole personalized design method for supporting and pressure reducing functions |
| CN113796852A (en) * | 2021-09-30 | 2021-12-17 | 太原理工大学 | Diabetes foot prediction method based on gradient lifting decision tree model algorithm |
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| CN117100250B (en) * | 2023-07-10 | 2024-05-28 | 北京华益精点生物技术有限公司 | Toe position determining method and device, electronic equipment and storage medium |
| CN117179741A (en) * | 2023-07-24 | 2023-12-08 | 北京华益精点生物技术有限公司 | Method for marking plantar position based on pressure and related equipment |
| CN117179741B (en) * | 2023-07-24 | 2024-05-28 | 北京华益精点生物技术有限公司 | Method for marking plantar position based on pressure and related equipment |
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