Human body sole contact mechanical testing device

Abstract

The utility model provides a human foot sole contact mechanical testing device which comprises a base (1), a step ladder (2) distributed on two sides of the base (1), a group of movable lifting racks (3) arranged on the base (1), pressure sensing assemblies (4) arranged on the lifting racks (3), and motion capture assemblies (5) arranged on the outer side of each lifting rack (3). One side of one step ladder (2) is provided with a computer (6) which is in electric signal data connection fit with the pressure sensing assembly (4) and the action capturing assembly (5). The device has the advantages of being simple in structure, convenient to use, low in manufacturing cost and low in later maintenance cost, meanwhile, various test requirements can be met, and daily, convenient and flexible testing can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of medical rehabilitation, specifically a human foot contact mechanics testing device. Background Technology

[0002] Lower limb dynamic analysis and assessment is a crucial component of clinical outpatient examinations and rehabilitation efficacy evaluations. In the early prevention and later rehabilitation treatment of diseases, by identifying and monitoring the patient's lower limb movement status and establishing disease early warning and assessment models, it can not only remind and guide patients to seek medical attention early and engage in effective postoperative rehabilitation training, but also transform doctors' subjective judgments into objective scientific data, leading to more precise and scientific diagnostic and treatment methods and techniques.

[0003] Current conventional testing methods involve doctors directly visually observing a patient's gait or using tools such as stopwatches, measuring tapes, and ink to record and evaluate lower limb movement and footprints. Therefore, these methods require a high level of professional knowledge and experience from doctors. In contrast, Wu Weiguo et al. from Harbin Institute of Technology have developed a utility model of an integrated intelligent plantar force measurement system adaptable to different foot lengths. This system uses a foot positioning device to enable plantar pressure testing for various foot lengths.

[0004] Zhang Feng from Xi'an University of Electronic Science and Technology has developed a utility model for an insole based on a flexible three-dimensional force sensor. This insole can achieve long-term, long-distance real-time measurement of the stress on the three-dimensional interface of the sole. However, this system cannot detect torque indicators and cannot combine the user's movement environment to monitor the lower limb movement and ground contact status in real time. Additionally, there are some gait observation products on the market, such as the AMTI three-dimensional force platform from the United States, the Bertec three-dimensional force platform from the United States, and the Novel pressure plate from Germany. However, these devices are relatively expensive and require high levels of maintenance, making them unsuitable for convenient and flexible daily testing. Utility Model Content

[0005] The present invention aims to overcome the shortcomings of the existing technology by providing a human foot contact mechanics testing device.

[0006] This application provides the following technical solution:

[0007] A human foot contact mechanics testing device is characterized in that: it includes a base, a step ladder distributed on both sides of the base, a set of movable lifting platforms on the base, a pressure sensing component on the lifting platforms, a motion capture component on the outside of each lifting platform, and a computer on one side of one of the step ladders that forms an electrical signal data connection with the pressure sensing component and the motion capture component.

[0008] Based on the above technical solutions, the following further technical solutions are also possible:

[0009] The base includes a set of parallel crossbeams, with support legs at both ends of the crossbeams and a set of guide rails on the crossbeams.

[0010] The lifting platform includes a base plate, a support on the base plate, an upper plate on the support, a lifting plate on the upper plate, a set of guide columns on the lifting plate, and a longitudinal telescopic device corresponding to and cooperating with the lifting plate on the base plate.

[0011] The pressure sensing component includes a connecting plate connected to the lifting platform, a set of sensor supports evenly distributed on the connecting plate, a pressure sensor installed on each sensor support, a surrounding plate on the outside of the sensor support, and a pedal covering a set of pressure sensors on the inside of the surrounding plate.

[0012] The motion capture component includes a camera bracket on which a motion capture camera is mounted.

[0013] Advantages of the utility model:

[0014] This utility model has the advantages of simple structure, convenient use, low cost and low maintenance cost. By setting up the lifting platform on different guide rails and adjusting the spacing of the lifting platform along the Y direction, it is possible to conduct observation tests on people with different shoulder widths and stride lengths. By adjusting each lifting platform to different heights, it can simulate various road conditions such as flat surfaces, upper and lower stairs, and complex non-planar rugged terrain, so as to observe the human walking state and the force on the soles of the feet under different road conditions. It can meet a variety of test requirements and can be used for convenient and flexible daily testing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 yes Figure 1 Schematic diagram of the middle base;

[0017] Figure 3 yes Figure 1 Schematic diagram of the pressure sensing component;

[0018] Figure 4 yes Figure 1 A schematic diagram of the structure of the lifting platform. Detailed Implementation

[0019] like Figure 1-4 As shown, a human foot contact mechanics testing device includes a base 1, which includes a set of parallel crossbeams 1a. Support legs 1c are fixedly connected to both ends of the crossbeams 1a, and a set of flatly distributed guide rails 1b are fixedly connected to the crossbeams 1a. The crossbeams 1a and guide rails 1b are axially perpendicular to each other. A soft pad 1d is connected to the bottom of the support legs 1c.

[0020] A movable lifting platform 3 is installed on the base 1. The lifting platform 3 includes a base plate 3a. A set of sliders (not shown in the figure) that correspond to and cooperate with the guide rail 1b are installed on the bottom of the base plate 3a. Locking pins (not shown in the figure) that correspond to and cooperate with the guide rail 1b are installed on the sliders. The base plate can be moved to the desired position by the cooperation of the sliders and the guide rail, and then fixed by the locking pins.

[0021] A bracket 3b is installed on the base plate 3a, and an upper plate 3c is fixed on the top of the bracket 3b. A set of guide bearings 3g is installed on the upper plate 3c, and a guide post 3f is inserted through each bearing 3g. Lifting plates 3d are distributed above the upper plate 3c, and the upper end of the guide post 3f is connected and fixed to the lifting plate 3d.

[0022] A longitudinal telescopic device 3e is fixed on the base plate 3a. The upper end of the output shaft of the longitudinal telescopic device 3e passes through the upper plate 3c and is connected and fixed to the lifting plate 3d. The output of the longitudinal telescopic device drives the lifting plate to rise and fall. The longitudinal telescopic device 3e can be a telescopic device in the prior art such as hydraulic, electric lifting, worm gear lifting, manual gear and rack lifting, pneumatic lifting, etc., so it will not be described in detail here. In this embodiment, the longitudinal telescopic device 3e is a servo electric cylinder.

[0023] A pressure sensing assembly 4 is installed on the lifting plate 3d. The pressure sensing assembly 4 includes a connecting plate 4a connected to the lifting plate 3d, and a set of sensor supports 4b are installed on the connecting plate 4a. A pressure sensor 4c is installed on each sensor support 4b. A surrounding plate 4d is provided on the outside of the sensor support 4b, and a pedal 4e covers the set of pressure sensors 4c inside the surrounding plate 4d.

[0024] Each lifting platform 3 is equipped with a motion capture component 5 on its outer side. The motion capture component 5 includes a camera bracket 5a, on which a motion capture camera 5b is mounted. A step ladder 2 is distributed on both sides of the base 1, thus forming a detection channel consisting of a set of lifting platforms with two step ladders 2 in between.

[0025] A computer 6 is provided on one side of the passage, and a corresponding motion capture component 5 is provided on the outside of each lifting platform. The motion capture component 5 includes a camera bracket 5a, on which a motion capture camera 5b is mounted.

[0026] The motion capture camera 5b, pressure sensor 4c, longitudinal telescopic device 3e, and computer 6 form an electrical signal data connection for control coordination.

[0027] Work process:

[0028] First, based on the required test scenario, the lifting platform is fixed in a suitable position. Then, the computer adjusts the lifting platform to the appropriate height. The test personnel then walk up to the testing channel via step 2, stepping onto the platform's pedals in sequence, and exit via another step 2. During this process, the motion capture component captures dynamic images, while the pressure sensing component generates pressure information, converting the measured pressure signal into an electrical signal and transmitting it to the computer. The dynamic images are also transmitted to the computer as electrical signals, which then analyzes and processes the data.

[0029] If the test is on flat ground, then... Figure 1 The computer adjusts all pedals to the same or nearly the same height. When testing non-flat, rugged road conditions, the computer adjusts all pedals to different heights to simulate varying degrees of road complexity.

Claims

1. A device for testing the contact mechanics of the human foot sole, characterized in that: It includes a base (1), a step ladder (2) distributed on both sides of the base (1), a set of movable lifting platforms (3) on the base (1), a pressure sensing component (4) on the lifting platform (3), a motion capture component (5) on the outside of each lifting platform (3), and a computer (6) on one side of one of the step ladders (2) that forms an electrical signal data connection with the pressure sensing component (4) and the motion capture component (5).

2. The human foot contact mechanics testing device according to claim 1, characterized in that: The base (1) includes a set of parallel beams (1a), with support legs (1c) at both ends of the beams (1a) and a set of guide rails (1b) on the beams (1a).

3. The human foot contact mechanics testing device according to claim 1, characterized in that: The lifting platform (3) includes a base plate (3a), a support (3b) on the base plate (3a), an upper plate (3c) on the support (3b), a lifting plate (3d) on the upper plate (3c), a set of guide columns (3f) on the lifting plate (3d), and a longitudinal telescopic device (3e) on the base plate (3a) that corresponds to and cooperates with the lifting plate (3d).

4. The human foot contact mechanics testing device according to claim 1, characterized in that: The pressure sensing component (4) includes a connecting plate (4a) connected to the lifting platform (3), a set of sensor supports (4b) are evenly distributed on the connecting plate (4a), a pressure sensor (4c) is installed on each sensor support (4b), a surrounding plate (4d) is provided on the outside of the sensor support (4b), and a pedal (4e) is covered on a set of pressure sensors (4c) inside the surrounding plate (4d).

5. The human foot contact mechanics testing device according to claim 1, characterized in that: The motion capture component (5) includes a camera bracket (5a) on which a motion capture camera (5b) is mounted.

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