RU2596517C2 - Configuration of special anatomic stock for ankle digital measurement - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: anatomical stock is proposed. It has a spring for placing a heel seat part and a support upper horizontal surface for installation of waist and ball and toe part. At that, doubled stock structure is symmetrically located to support another foot, located in the measuring device with a 3D-scanner, in which a scanning device is mounted along the perimeter of the anatomical stock.

EFFECT: upper surface of the anatomic stock has the shape of plantar part of the foot loaded by power of body weight, lower surface is a horizontal projection of the upper surface of the anatomic stock, side surfaces are formed between upper and lower surfaces.

4 cl, 2 dwg

Description

FIELD OF THE INVENTION

The invention relates to the shoe industry and can be used in the manufacture of individual shoe pads intended for wear by persons with standard foot sizes, as well as having certain deviations in the shape of the foot, for example due to its static deformation. The invention allows the creation of conditions for the correct digital measurement of the ankle for the automated manufacture of a “punch” shoe (that is, a shoe that corresponds to the dimensional parameters of the foot) for the manufacture of individual and orthopedic shoes, which makes it possible to avoid various negative effects on the foot - excessive deformations of the foot, injuries soft tissue, vascular compression, etc.

State of the art

The closest in technical essence is the prototype method for measuring the ankle using a three-dimensional volumetric body scanner presented by Delcam [www.Delcam.ru/public/list.htm].

The method described in the prototype consists of the following operations:

- the customer sets the foot in the scanning device for measuring on a horizontal surface;

- a three-dimensional scanner reads information about the surface of the foot and transfers it to the computer-aided design (CAD) system;

- in CAD, digital information is converted into a visual image of a three-dimensional three-dimensional body (the image of the foot in the form of a shell).

Reasons that prevent obtaining the desired result

The prototype has the disadvantage that initially the scanning of the foot occurs on a horizontal flat surface without taking into account the profile of the plantar part of the foot and its position, except for the horizontal one in shoes when worn. That is, when scanning, the stereometry of the foot and the elevation of its heel and toe are not taken into account, which is necessary for the correct design of the shoe sizes according to the given measurements of the foot. In addition, as a result of the anatomically incorrect location of the human foot on the horizontal plane, the position of the center of forces versus the weight force of the corresponding configuration of the human body having an arbitrary configuration is not taken into account, which affects the increment of the volumetric characteristics of different parts of the foot and, accordingly, the accuracy and reliability of digital information.

Disclosure of invention

Technical result

The bed is a solid volumetric body, consisting of a dense non-deformable, opaque material with a rough surface (carbon fiber, solid wood, gypsum). The upper surface of the bed corresponds to the imprint of the plantar part of the foot, located in shoes with a given height of the heel and the rise of the toe. The impression of the plantar part of the foot is obtained by squeezing the foot of the plastic insole, on the surface of which irreversible deformations remain, reflecting the profile of the plantar part by the foot support pressed by the reaction. The outer upper contour of the profiled surface of the bed is a generatrix of the vertical side surfaces of the bed. The height of the fore part of the bed is defined as the sum of the height of the baseline plus the height of the raised fore part. The heel height is the sum of the height of the baseline plus the height of the heel. The height of the base line of the bed is determined by the location of the scanning devices on the optical axis of the 3D laser scanner. The lower surface of the bed is a horizontal projection of the upper surface of the bed.

The designed bed makes it possible to scan the ankle in its anatomically correct position. For the correct position of the human body there is also a symmetrically located pair bed on which the second foot is mounted, which provides a horizontal projection of the point of the common center of mass in the middle position between the pair beds.

On the upper surfaces of the beds are flexible matrices with load cells that determine the loads of the plantar parts of the feet, which makes it possible to set the anatomically correct position of a person and, accordingly, get the correct scan results of the ankle. Alternatively, instead of a matrix of sensors, load cells mounted in the surface of the bed can be used. Information from the load sensors is transmitted to a peripheral device that shows the necessary correction of the position of the human body for the projection of the point of the common center of mass of the center point on the axis of symmetry of the location of the boxes.

The anatomical bed, having a stand under the heel of the foot and a supporting horizontal surface of the base for installing the foot on it, as well as a symmetrically paired design for supporting the other foot and a scanning device located around the perimeter, is characterized in that the upper surface of the anatomical bed has the shape of a weighted load the body of the test plantar part of the foot, the lower surface is a horizontal projection of the upper surface of the anatomical bed, the side surfaces are built forming between the upper and lower surfaces.

The upper surface of the anatomical bed has elevations in the heel of the heel that are identical to the parameters of similar parts of the foot in shoes with different heel and toe heights.

The gel part of the upper surface of the anatomical bed has the configuration of the corresponding section of the anatomical insole and is in the process of measurement in contact with the foot of the subject.

Strain gages in the form of a matrix and individual mounted elements connected to a peripheral device are located in the upper relief surface, which makes it possible to determine the center of forces of the test person’s body and its anatomically correct position at various elevation angles of the heel and forefoot.

The implementation of the invention

Measurement of the ankle on the anatomical bed using a laser digital scanner and computer-aided design system includes obtaining points of location of the ankle surface using a laser in a three-dimensional coordinate system.

In this case, the installation of the measured human ankle is performed on the anatomical bed, with imitation of the position of the foot in shoes at given heights of the heel and forefoot, as well as with the anatomically appropriate application of a common center of forces.

The position of the common center of forces is determined using strain gauges located on the upper surface of the anatomical bed, showing with a peripheral device the load in various zones of contact of the bed with the foot and calculating the coordinates of the point of application of the common center of forces, which allows the body of the subject to be set in the anatomically correct position.

The measured person (customer) sets the feet on two beds, one of which is located in the scanning device, the dimensional parameters of the bed take into account the position of the foot in the shoe when worn, which is necessary for the correct design of the shoe sizes according to the foot measurement carried out by three-dimensional scanning.

The proposed device of the anatomical bed will allow digital measurement of the ankle in the anatomically correct position, taking into account the elevation of the heel and forefoot of the foot and the position of the common center of forces, which is necessary for the correct design of the shoe sizes according to the foot measurements. With the proposed method, customer contact with staff is minimized.

The sequence of actions during the implementation of the proposed method

The customer places the foot in the scanning device on the anatomical bed, which ensures the anatomically correct position of the ankle, taking into account the elevation of the heel and forefoot of the foot and the position of the common center of forces. For the correct position of the human body there is also a symmetrically located pair bed on which the second foot is mounted, which provides a horizontal projection of the point of the common center of mass in the middle position between the pair beds.

The position of the common center of forces is determined using a matrix of sensors mounted on the upper surface of the bed, or a removable set of sensors, for example, in the form of a tensometric insole, showing with a peripheral device the load in different zones of contact of the bed with the foot and calculating the coordinates of the point of application of the common center of forces, which allows you to set the body of the subject in anatomically correct position. The position of the human body is fixed in the corresponding anatomical position.

Next, the foot is scanned taking into account its individual characteristics.

Thus, a digital method for measuring the ankle is implemented, containing the following operations: installing the feet of the person being measured on paired anatomical beds, determining the center of mass, correcting the position of the person in the anatomically correct position for the projection of the point of the common center of mass with the axis of symmetry of the location of the beds using strain gauges and a peripheral device .

List of drawings

The figure 1 shows the structure of the anatomical bed with strain gauges: 1 - anatomical bed (left) for digital measurement of the ankle; 2 - load cells built into the bed.

The presented figure 2 shows the location of the anatomical box during 3D scanning: 1 - anatomical bed (left) for digital measurement of the ankle; 2 - load cells built into the bed; 3 - anatomical bed (right) for digital measurement of the ankle; 4 - 3D scanner; 5 - sensors of the 3D scanner.

Information confirming the possibility of carrying out the invention

The invention proposes the use of an anatomical bed device in the digital method of measuring the ankle, in view of the obvious advantages of the latter, noted above.

The proposed device of the anatomical bed 1 (Fig. 1) with built-in load cells 2 located in its upper relief surface, allows you to set the person in the anatomically correct position at different elevation angles of the heel and forefoot and determine the center of strength of the body of the subject. The use of a pair of anatomical box devices for scanning the ankle, one of which left 1 (Fig. 2) at the time of scanning is located inside the scanning device 4, and the second right 3 outside the scanning device 4 provides a symmetrical stop position when digitally measuring the ankle. Scanning is carried out using the sensors of the 3D scanner 5 (Fig. 2) installed in the 3D scanner 4 (Fig. 2).

Claims (4)

1. An anatomical bed with elevation for location in the heel of the foot and a supporting upper horizontal surface for installation of the gel-beam and forefoot parts of the foot, the pair structure of the bed for supporting the other foot located in the measuring device with a 3D scanner is symmetrically located in which the scanning device is mounted around the perimeter of the anatomical bed, characterized in that the upper surface of the anatomical bed has the shape of a loaded body weight of the test plantar feet, the lower surface is a horizontal projection of the upper surface of the anatomical bed, the lateral surfaces are built between the generators of the upper and lower surfaces. 2. The bed according to claim 1, characterized in that its upper surface has elevations in the heel of the heel that are identical to the location parameters of similar parts of the foot in shoes having different heel and toe heights. 3. The bed according to claim 1, characterized in that the gel part of its upper surface has the configuration of the corresponding section of the anatomical insole and is in the process of measurement in contact with the foot of the subject. 4. The bed according to claim 1, characterized in that load cells in the form of a matrix or separate mounted elements connected to a peripheral device are located in its upper relief surface, which makes it possible to determine the center of force of the test person’s body and its anatomically correct position at different heel and toe parts during 3D scanning.

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