Tracking method and device for foot movement in shoe wearing state

Abstract

The invention discloses a method and device for tracking foot movement in a shoe wearing state in the technical field of movement tracking, and the method comprises the steps that a test shoe body matched with a tester is selected, the test shoe body comprises a detachable upper vamp and a running shoe midsole, and the upper vamp is provided with a plurality of test holes. The detachable upper vamp and the running shoe midsole are installed in a matched mode, the multiple testing holes are formed in the upper vamp, when the testing shoe body is matched with the foot of a tester, the multiple testing holes are used for installing the identification body, the identification body stably and accurately displays the corresponding motion tracking point position of the foot externally, and therefore the testing shoe body is convenient to use. Motion information of the motion capture system is conveniently captured, then a motion model is established through motion analysis software, foot motion postures are accurately analyzed, biomechanical properties of materials and structural design of the running shoe midsole are evaluated, meanwhile, the detachable running shoe midsole is replaced according to different requirements, and then performance evaluation is conducted on different running shoe midsoles. The application range is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of motion tracking, and in particular to a method and a device for tracking foot motion in a shoe-wearing state. Background Art

[0002] In the biomechanical test of running, the mainstream method currently used to capture the foot movement during non-barefoot exercise is to place markers on several parts of the shoe, such as reflective marker balls, and use an infrared three-dimensional motion capture system to track the movement of the shoe during exercise. The two are assumed to be an integrated structure, that is, the movement of the shoe also represents the movement of the foot. Since the foot will have a certain relative movement in the shoe, although this movement is relatively small, the accurate quantification of the foot movement is very important for the performance evaluation of sports shoe midsoles or functional rehabilitation shoes.

[0003] The existing method is to dig holes in the upper and the shoe body to expose some parts of the foot, attach tracking points, and then perform motion capture to achieve motion capture of the midsole of the shoe body. However, this method not only damages the shoe body, but more importantly, the dug holes cannot accurately and conveniently fit the foot positioning, resulting in inaccurate foot movement assessment and poor use effect. Summary of the invention

[0004] The purpose of the present invention is to provide a method and device for tracking foot movement in a shoe-wearing state, so as to solve the above-mentioned problems of damage to the shoe body during shoe body motion capture and insufficient motion capture accuracy.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] On the one hand, to achieve the above-mentioned purpose, the present invention provides a method for tracking foot movement in a shoe-wearing state, comprising:

[0007] Selecting a test shoe body suitable for the tester, wherein the test shoe body comprises a detachable upper vamp and a running shoe midsole, and the upper vamp is provided with a plurality of test holes;

[0008] Place the marker in the test hole of the upper shoe surface, and install the upper shoe surface on the midsole of the running shoe to form a complete test shoe body and make the marker correspond to the foot point;

[0009] The motion information of the marker is captured by a motion capture system, the motion information is input into the motion analysis software, and a motion model is established to analyze the foot motion posture data, thereby evaluating the biomechanical properties of the material and structural design of the running shoe midsole.

[0010] As a further solution of the present invention: the test shoe body comprises a detachable upper vamp and a running shoe midsole, including;

[0011] The upper shoe upper is made by 3D printing, wherein the 3D printing is a light-curing printing technology to form a soft, wear-resistant, one-piece and hollow upper shoe upper;

[0012] The bottom end surface of the upper shoe upper can be detachably bonded to the midsole of the running shoe.

[0013] As a further solution of the present invention: the upper vamp is provided with a plurality of test holes;

[0014] The upper shoe upper is hollowed out as a whole, and the hollowed-out upper shoe upper is used to observe the real-time movement status of the foot. The multiple test holes on the upper shoe upper are used to install identification bodies for multi-point identification. The test holes on both sides of the upper shoe upper are used to horizontally adjust the identification bodies to adjust the correspondence between the identification bodies and the test points of the foot.

[0015] As a further solution of the present invention: the marker is placed in the test hole of the upper shoe surface, and the upper shoe surface is mounted on the midsole of the running shoe to form a complete test shoe body and the marker corresponds to the foot point;

[0016] The identification body is a detachable fitting body and a marking ball. The fitting body is fitted on corresponding points of the foot, and the marking ball is arranged on the outer side of the upper shoe surface.

[0017] As a further solution of the present invention: the motion information of the marker is captured by the motion capture system, the motion information is input into the motion analysis software, and a motion model is established;

[0018] The motion capture system includes an infrared light spot motion capture system (Vi con), which is used to perform static calibration information and motion capture information on the marker. The static calibration information and motion capture information form motion information. The motion information is input into motion analysis software, and a local motion model of the foot is established to analyze foot motion posture data, evaluate the impact of the running shoe midsole on foot movement, and then evaluate the biomechanical properties of the material and structural design of the running shoe midsole.

[0019] In a second aspect, a foot motion tracking device is also provided, comprising:

[0020] A test shoe body, the test shoe body comprising an upper vamp and a running shoe midsole, the upper vamp and the running shoe midsole are detachably mounted, a plurality of test holes are arranged on the upper vamp, and the upper vamp is matched and mounted on the running shoe midsole;

[0021] The identification body is installed in a plurality of test holes on the upper shoe surface, and the identification body is used for sports identification at multiple points on the upper shoe surface.

[0022] As a further solution of the present invention: the upper shoe upper is hollowed out as a whole, and the test holes on both sides of the upper shoe upper are U-shaped, so as to adjust and install the identification body on both sides of the upper shoe upper.

[0023] As a further solution of the present invention: the connection between the upper shoe upper and the running shoe midsole is bonded with nano double-sided adhesive, and the upper shoe upper and the running shoe midsole are matched and bonded by the nano double-sided adhesive.

[0024] As a further solution of the present invention: the identification body includes a fitting body and a marking ball, a mounting hole is opened in the middle of the fitting body, a mounting rod is fixedly connected to the marking ball, a center line of the mounting rod coincides with the axis line of the marking ball, and the mounting rod is threadedly installed in the mounting hole.

[0025] As a further solution of the present invention: the surface of the marking ball is coated with reflective paint, the fitting surface of the fitting body is an arc-shaped surface, and the fitting body is made of rubber material.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. In the present invention, a detachable upper shoe surface and a running shoe midsole are matched and installed, and a plurality of test holes are set on the upper shoe surface. When the test shoe body matches the tester's foot, the plurality of test holes are used to install the marker, and the marker stably and accurately displays the corresponding motion tracking point of the foot externally, which is convenient for the motion capture system to capture the motion information, and then the motion model is established through the motion analysis software, the foot motion posture is accurately analyzed, and then the biomechanical properties of the material and structural design of the running shoe midsole are evaluated. At the same time, the detachable running shoe midsole can be replaced according to different needs, and then the performance of different running shoe midsoles can be evaluated, which has a wide range of applications.

[0028] 2. In the present invention, the upper shoe upper is hollowed out as a whole, and the hollow holes of the upper shoe upper can fully display the foot to observe whether the marker is accurately fitted to the corresponding points of the foot, and whether the marker is offset can be observed in real time to ensure the accuracy of the motion capture data. The hollow upper shoe upper can observe the foot in real time, which is convenient for the subsequent adjustment of motion capture, and further ensures the accurate motion capture of the foot. The test holes on both sides of the upper shoe upper are U-shaped, and the length of the test holes on the sides is greater than the length of the installation part of the marker, so that the marker can be adjusted and moved in the test holes on both sides. When the foot is worn in the upper shoe upper, the position of the marker can be adjusted to make the markers on both sides correspond to the test points of the foot, so as to ensure the subsequent accurate analysis of the foot movement posture. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the method flow of the present invention;

[0030] Figure 2It is a schematic diagram of the test shoe body structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the explosion structure of the test shoe body of the present invention;

[0032] Figure 4 It is a schematic diagram of the top view of the upper shoe surface of the present invention;

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of the logo body of the present invention;

[0034] Figure 6 It is a schematic diagram of the explosion structure of the identification body of the present invention.

[0035] In the figure: 1. test shoe body; 101. upper shoe surface; 102. test hole; 103. running shoe midsole; 2. identification body; 201. fitting body; 202. mounting hole; 203. identification ball; 204. mounting rod. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example:

[0038] See also Figure 1 In an embodiment of the present invention, a method for tracking foot movement in a shoe-wearing state includes:

[0039] S1: Select a test shoe body 1 adapted to the tester, wherein the test shoe body 1 comprises a detachable upper vamp 101 and a running shoe midsole 103, and the upper vamp 101 is provided with a plurality of test holes 102;

[0040] S2: placing the marker 2 in the test hole 102 of the upper shoe surface 101, and installing the upper shoe surface 101 on the running shoe midsole 103 to form a complete test shoe body 1 and to make the marker 2 correspond to the foot point;

[0041] S3: The motion information of the marker 2 is captured by the motion capture system, the motion information is input into the motion analysis software, and a motion model is established to analyze the foot motion posture data, thereby evaluating the biomechanical properties of the material and structural design of the running shoe midsole 103.

[0042] Specifically, in the method, a detachable upper shoe 101 and a running shoe midsole 103 are matched and installed, and a plurality of test holes 102 are set on the upper shoe 101. When the test shoe body 1 is matched with the tester's foot, the plurality of test holes 102 are installed with the marker 2, and the marker 2 stably and accurately displays the corresponding motion tracking points of the foot externally, so as to facilitate the motion capture system to capture the motion information, and then establish a motion model through the motion analysis software, accurately analyze the foot motion posture, and then evaluate the biomechanical properties of the material and structural design of the running shoe midsole 103. The detachable running shoe midsole 103 can be replaced according to different needs, and then the performance of different running shoe midsoles 103 can be evaluated. The application range is wide, and the upper vamp 101 can be reused to cooperate with different running shoe midsoles 103 to perform performance evaluation and provide more accurate performance data. The biomechanical properties shown by the material and structural design of the running shoe midsole 103 are the most critical elements of the running shoe. In the early research and development of the running shoe, the detachable upper vamp 101 and the running shoe midsole 103 can be used together to greatly save research and development time, and the operability is strong and the use effect is good.

[0043] Preferably, Figure 1-Figure 4 As shown, the test shoe body 1 includes a detachable upper vamp 101 and a running shoe midsole 103, including the upper vamp 101; the upper vamp 101 is made by 3D printing, wherein the 3D printing is a photocuring printing technology to form a soft, wear-resistant, one-piece and hollow upper vamp 101; the bottom end surface of the upper vamp 101 is detachably bonded to the running shoe midsole 103.

[0044] Specifically, the upper vamp 101 is designed using the photocuring printing technology in 3D printing. The material selection of the entire implementation process is a flexible photosensitive resin with good flexibility, strength and elasticity to adapt to the movement of the foot without hindering its flexibility. The 3D printing equipment selects a photocuring 3D printer with high precision and a sufficiently large molding volume to ensure that it supports the optimal curing parameters of the selected material (such as an ultraviolet light source with a wavelength of 405nm). The modeling software is used and a 3D model of the upper vamp 101 is created on it. According to the anatomical structure of the foot, a model of the upper vamp 101 that fits the foot is designed and has different sizes. The upper vamp 101 needs to cover key parts such as the dorsum of the foot, the heel, and the metatarsophalangeal joint. The test holes 102 are set at the designated positions of the upper vamp 101, such as the test holes 102 hollowed out at the first metatarsophalangeal joint and the fifth metatarsophalangeal joint of the foot, and the test holes 102 corresponding to the hollowed out at the dorsum of the foot and the heel, so as to place the marker 2. Furthermore, the structural hardness around the test holes 102 should also be strengthened at the edges of the test holes 102 to be closer to the actual design of the upper shoe 101 of the running shoe;

[0045] The upper shoe surface 101 and the running shoe midsole 103 are bonded with nano double-sided adhesive to ensure bonding strength and facilitate cleaning to avoid colloid residue.

[0046] Furthermore, during the printing process of the upper vamp 101, the photosensitive resin is first poured into the resin tank of the printer. There is a transparent glass or film window at the bottom of the resin tank that allows ultraviolet light to pass through. The laser of the printer emits an ultraviolet laser beam and scans the resin surface point by point according to the instructions of the slicing software. In the area irradiated by the laser beam, the photosensitive resin undergoes photopolymerization and solidifies. After each layer of scanning is completed, the printing platform will move upward by a layer thickness, and the new liquid resin will cover the solidified layer. The laser beam continues to scan the next layer until the entire model is printed. After printing, the upper vamp 101 needs to be post-processed. First, remove the semi-finished product on the building platform from the printer. At this time, the part that is not illuminated is still liquid resin, which needs to be cleaned with a scraper or special tool. Then use a special cleaning fluid to thoroughly clean the print to remove the residual liquid resin. The cleaned print also needs to be placed in a UV curing box for secondary curing to ensure that all exposed resins are completely hardened and improve the mechanical properties of the parts. Then carefully remove the support structure in the design. Finally, the printed part is subjected to finishing treatments such as grinding and polishing to make its surface smoother and more beautiful. The upper shoe upper 101 finally printed presents a 3D appearance and has good softness and deformation ability.

[0047] Preferably, Figure 2-Figure 4 As shown, the upper vamp 101 is provided with a plurality of test holes 102;

[0048] The upper shoe upper 101 is hollowed out as a whole, and the hollowed-out upper shoe upper 101 is used to observe the real-time movement status of the foot. The multiple test holes 102 on the upper shoe upper 101 are used to install the identification body 2 for multi-point identification. The test holes 102 on both sides of the upper shoe upper 101 are used to horizontally adjust the identification body 2 to adjust the correspondence between the identification body 2 and the foot test points.

[0049] Specifically, the upper vamp 101 is hollowed out as a whole, and the hollow holes of the upper vamp 101 can fully display the foot, so as to observe whether the marker 2 is accurately fitted to the corresponding points of the foot, and whether the marker 2 is offset can be observed in real time, so as to ensure the accuracy of the motion capture data. The hollow upper vamp 101 can observe the foot in real time, and then facilitate the adjustment of subsequent motion capture, further ensure the accurate motion capture of the foot movement, and is conducive to the accurate quantification of the foot movement. The use effect is good, and more on the upper vamp 101 The test holes 102 are provided to correspond to the installation of the marker 2 and mark multiple corresponding points on the foot. Among them, the test holes 102 on both sides of the upper shoe surface 101 are U-shaped, and the length of the side test holes 102 is greater than the length of the installation part of the marker 2, so that the marker 2 can be adjusted and moved in the test holes 102 on both sides. When the foot is worn in the upper shoe surface 101, the position of the marker 2 can be adjusted to make the markers 2 on both sides correspond to the test points of the foot, so as to facilitate the subsequent accurate analysis of the foot movement posture.

[0050] Furthermore, the opening areas of the two sides of the upper shoe upper 101 are larger than those of other test holes 102 , and the edges of the test holes 102 on both sides are reinforced, and thicker reinforcement rings are added to the edges of the sides to improve the mechanical properties of the side test holes 102 .

[0051] Preferably, Figure 4 As shown, the marker 2 is placed in the test hole 102 of the upper shoe 101, and the upper shoe 101 is mounted on the running shoe midsole 103 to form a complete test shoe body 1 and to make the marker 2 correspond to the foot point;

[0052] The identification body 2 is a detachable fitting body 201 and a marking ball 203 . The fitting body 201 is fitted on corresponding points of the foot, and the marking ball 203 is arranged on the outer side of the upper vamp 101 .

[0053] Specifically, the detachable identification body 2 is convenient to be placed and installed in the test hole 102, and at the same time, the fitting body 201 is fitted with the corresponding detection point of the foot to avoid the overall displacement of the identification body 2, and the installation is stable. In addition, the identification ball 203 externally marks the corresponding detection point of the foot, which is convenient for the accurate capture of motion information, so as to ensure the subsequent accurate evaluation of the mechanical properties of the running shoe midsole 103.

[0054] Preferably (not shown), the motion information of the marker 2 is captured by a motion capture system, the motion information is input into the motion analysis software, and a motion model is established;

[0055] The motion capture system includes an infrared light spot motion capture system (Vi con), which is used to perform static calibration information and motion capture information on the marker 2. The static calibration information and the motion capture information form motion information. The motion information is input into the motion analysis software, and a local motion model of the foot is established to analyze the foot motion posture data, thereby evaluating the impact of the running shoe midsole 103 on the foot movement, and then evaluating the biomechanical properties of the material and structural design of the running shoe midsole 103.

[0056] Specifically, the infrared light spot motion capture system (Vicon) is used to perform static calibration and motion capture on the marker 2 during the entire running process of the human body. The obtained three-dimensional coordinate time series data file of the marker 2 is imported into the motion analysis software (Visua l 3D) to establish a local motion model of the human foot, and analyze the motion posture data of the human ankle joint or foot segment during the motion process.

[0057] The effects of the material and structural design of the sports shoe midsole on foot movement are evaluated, and the biomechanical properties of the material and structural design of the running shoe midsole 103 are further evaluated.

[0058] See also Figure 2-Figure 6 As shown, a foot motion tracking device comprises:

[0059] A test shoe body 1, the test shoe body 1 comprises an upper vamp 101 and a running shoe midsole 103, the upper vamp 101 and the running shoe midsole 103 are detachably mounted, a plurality of test holes 102 are arranged on the upper vamp 101, and the upper vamp 101 is matched and mounted on the running shoe midsole 103;

[0060] The identification body 2 is installed in a plurality of test holes 102 on the upper shoe surface 101 . The identification body 2 is used for sports identification at multiple points on the upper shoe surface 101 .

[0061] Specifically, when in use, the upper shoe upper 101 and the corresponding running shoe midsole 103 to be tested are installed to form a test shoe body 1, and the identification body 2 is installed in the multiple test holes 102 of the upper shoe upper 101. After the foot is put on and enters the test shoe body 1, the identification body 2 is matched with the test points of the foot, and then the test points of the foot are marked, which is convenient for the subsequent capture of motion information of the corresponding test points of the foot, so as to analyze the foot motion posture data, and then evaluate the biomechanical properties of the material and structural design of the running shoe midsole 103. The detachable upper shoe upper 101 and running shoe midsole 103 can be used multiple times, avoiding the destructive inspection of the traditional complete shoe body, reducing the research and development cost while ensuring the accuracy of the test data, and having a good use effect.

[0062] Furthermore, lacing holes are provided on the upper vamp 101. When in use, the lacing holes on the upper vamp 101 are installed in conjunction with lacing to ensure that the upper vamp 101 is stably connected to the foot.

[0063] Preferably, Figure 2-Figure 4 As shown, the upper shoe surface 101 is hollowed out as a whole, and the test holes 102 on both sides of the upper shoe surface 101 are U-shaped so as to adjust and install the identification body 2 on both sides of the upper shoe surface 101.

[0064] Specifically, the upper shoe upper 101 is hollowed out as a whole, and the hollow holes of the upper shoe upper 101 can fully display the foot to observe whether the marker 2 accurately fits the corresponding points of the foot, and can observe in real time whether the marker 2 is offset, thereby ensuring the accuracy of the motion capture data. The hollow upper shoe upper 101 can observe the foot in real time, which is convenient for the subsequent adjustment of motion capture, further ensuring the accurate motion capture of the foot movement, and is beneficial to the accurate quantification of the foot movement. In addition, the U-shaped test holes 102 on both sides of the upper shoe upper 101 allow the marker 2 to be adjusted and moved in the test holes 102 on both sides. When the foot is worn in the upper shoe upper 101, the position of the marker 2 can be adjusted to make the markers 2 on both sides correspond to the test points of the foot, thereby ensuring the accuracy of motion information capture and accurately evaluating the biomechanical properties of the material and structural design of the running shoe midsole 103.

[0065] Preferably (not shown), the joints between the upper shoe upper 101 and the running shoe midsole 103 are bonded with nano double-sided adhesive tape, and the upper shoe upper 101 and the running shoe midsole 103 are matched and bonded by the nano double-sided adhesive tape.

[0066] Specifically, the connection between the upper shoe surface 101 and the running shoe midsole 103 is bonded with nano double-sided adhesive to ensure the bonding strength and to facilitate removal and cleaning during disassembly, thus achieving good use effect.

[0067] Preferably, Figure 5 and Figure 6 As shown, the identification body 2 includes a fitting body 201 and a marking ball 203. A mounting hole 202 is opened in the middle of the fitting body 201. A mounting rod 204 is fixedly connected to the marking ball 203. The center line of the mounting rod 204 coincides with the axis of the marking ball 203. The mounting rod 204 is threadedly installed in the mounting hole 202.

[0068] Specifically, the detachable fitting body 201 and the marking ball 203 are convenient to be installed in the test hole 102 of the upper shoe surface 101. After the fitting body 201 is placed inside, the mounting rod 204 can be matched and installed in the mounting hole 202 of the fitting body 201 by turning the marking ball 203. The center line of the mounting rod 204 coincides with the axis of the marking ball 203, thereby ensuring that the center points of the marking ball 203, the mounting rod 204 and the fitting body 201 are on the same axis, allowing the marking ball 203 to accurately display the motion information of the corresponding point of the foot, thereby ensuring the accuracy of data detection and facilitating the subsequent evaluation of the biomechanical properties of the material and structural design of the running shoe midsole 103.

[0069] Preferably (not shown), the surface of the marking ball 203 is coated with reflective paint, the fitting surface of the fitting body 201 is an arc-shaped surface, and the fitting body 201 is made of rubber material.

[0070] Specifically, the reflective paint coated on the surface of the marking ball 203 facilitates the recognition of the motion capture system and enables precise capture. The arc-shaped fitting surface of the fitting body 201 facilitates stable fitting with the foot points. The fitting body 201 made of elastic rubber material facilitates stable fitting with the foot and adapts to elastic deformation to adapt to the skin shape of different points on the foot, resulting in good use effect.

[0071] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for tracking foot movement in a shoe-wearing state, characterized in that: include: Selecting a test shoe body suitable for the tester, wherein the test shoe body comprises a detachable upper vamp and a running shoe midsole, and the upper vamp is provided with a plurality of test holes; Place the marker in the test hole of the upper shoe surface, and install the upper shoe surface on the midsole of the running shoe to form a complete test shoe body and make the marker correspond to the foot point; The motion information of the marker is captured by a motion capture system, the motion information is input into the motion analysis software, and a motion model is established to analyze the foot motion posture data, thereby evaluating the biomechanical properties of the material and structural design of the running shoe midsole.

2. The method for tracking foot movement in a shoe-wearing state according to claim 1, characterized in that: The test shoe body includes a detachable upper upper and a running shoe midsole, including; The upper shoe upper is made by 3D printing, wherein the 3D printing is a light-curing printing technology to form a soft, wear-resistant, one-piece and hollow upper shoe upper; The bottom end surface of the upper shoe upper can be detachably bonded to the midsole of the running shoe.

3. The method for tracking foot movement in a shoe-wearing state according to claim 2, characterized in that: The upper vamp is provided with a plurality of test holes; The upper shoe upper is hollowed out as a whole, and the hollowed-out upper shoe upper is used to observe the real-time movement status of the foot. The multiple test holes on the upper shoe upper are used to install identification bodies for multi-point identification. The test holes on both sides of the upper shoe upper are used to horizontally adjust the identification bodies to adjust the correspondence between the identification bodies and the test points of the foot.

4. The method for tracking foot movement in a shoe-wearing state according to claim 1, characterized in that: The marking body is placed in the test hole of the upper shoe surface, and the upper shoe surface is mounted on the midsole of the running shoe to form a complete test shoe body and make the marking body correspond to the foot point; The identification body is a detachable fitting body and a marking ball. The fitting body is fitted on corresponding points of the foot, and the marking ball is arranged on the outer side of the upper shoe surface.

5. The method for tracking foot movement in a shoe-wearing state according to claim 1, characterized in that: The motion capture system is used to capture the motion information of the marker, the motion information is input into the motion analysis software, and a motion model is established; The motion capture system includes an infrared light spot motion capture system (Vicon), which is used to perform static calibration information and motion capture information on the marker. The static calibration information and motion capture information form motion information. The motion information is input into motion analysis software, and a local motion model of the foot is established to analyze foot motion posture data, evaluate the impact of the running shoe midsole on foot movement, and then evaluate the biomechanical properties of the material and structural design of the running shoe midsole.

6. A foot motion tracking device, applied to the method for tracking foot motion in a shoe-wearing state as claimed in any one of claims 1 to 5, characterized in that: The foot motion tracking device comprises: A test shoe body, the test shoe body comprising an upper vamp and a running shoe midsole, the upper vamp and the running shoe midsole are detachably mounted, a plurality of test holes are arranged on the upper vamp, and the upper vamp is matched and mounted on the running shoe midsole; The identification body is installed in a plurality of test holes on the upper shoe surface, and the identification body is used for sports identification at multiple points on the upper shoe surface.

7. The foot motion tracking device according to claim 6, characterized in that: The upper shoe surface is hollowed out as a whole, and the test holes on both sides of the upper shoe surface are U-shaped so as to adjust and install the identification bodies on both sides of the upper shoe surface.

8. The foot motion tracking device according to claim 7, characterized in that: The connection between the upper shoe upper and the running shoe midsole is bonded with nano double-sided adhesive tape, and the upper shoe upper and the running shoe midsole are matched and bonded by the nano double-sided adhesive tape.

9. The foot motion tracking device according to claim 8, characterized in that: The identification body includes a fitting body and a marking ball. A mounting hole is provided in the middle of the fitting body. A mounting rod is fixedly connected to the marking ball. The center line of the mounting rod coincides with the axis line of the marking ball. The mounting rod is threadedly installed in the mounting hole.

10. The foot motion tracking device according to claim 9, characterized in that: The surface of the marking ball is coated with reflective paint, the fitting surface of the fitting body is an arc-shaped surface, and the fitting body is made of rubber material.

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