Equipment for balance training and gravity center positioning method

Abstract

The invention provides equipment for balance training and a gravity center positioning method, and the equipment comprises a chassis, the center of which is hollow; the three sensor fixing blocks are arranged at the lower part, close to the hollow area, of the chassis; the three pressure sensors are respectively arranged on the three sensor fixing blocks; the stress disc is positioned in the hollow area of the chassis and above the pressure sensor; and a gap is formed between the periphery of the stress disc and the inner side wall of the chassis, so that the force of the stress disc is completely applied to the stress sensor. The positioning method comprises the steps that a tester stands at any position of a stress disc and clicks a test start button, pressure data of M groups of three pressure sensors are obtained within set timing, and M barycentric coordinates are calculated according to the position relation between the M groups of data and the three pressure sensors; averaging the M barycentric coordinates to obtain an initial barycentric coordinate of the tester; the initial barycentric coordinates serve as the test center of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of rehabilitation medicine, and in particular to a device for balance training and a method for locating the center of gravity. Background Art

[0002] At present, most patients with neurological problems such as stroke will have impaired balance ability, and need balance equipment for testing and training to adjust the center of gravity. In this process, the starting point of the test and training must be determined first. When testing balance ability, current balance products generally locate the center point of the test platform as the test dot, but in actual use, the user actually stands on both feet, and it is difficult to ensure that the actual center of gravity completely coincides with the center point of the test platform. This misalignment will cause errors in the user's actual testing and training process, affecting the patient's testing and training.

[0003] Therefore, how to ensure that the actual center of gravity of the trainee coincides with the center point of the test platform at the beginning of training is a problem that needs to be solved at present. Summary of the invention

[0004] The purpose of the present invention is to provide a device for balance training and a method for locating the center of gravity, which can obtain accurate center of gravity coordinates before the test begins.

[0005] In order to achieve the above object, the present invention provides a device for balance training, comprising:

[0006] A chassis, wherein the center of the chassis is hollowed out;

[0007] Three sensor fixing blocks are arranged below the chassis near the hollow area;

[0008] Three pressure sensors are respectively mounted on the three sensor fixing blocks;

[0009] A force-bearing plate, located in the hollow area of ​​the chassis and above the pressure sensor;

[0010] There is a gap between the outer periphery of the force-bearing disk and the inner side wall of the chassis, so that the force of the force-bearing disk is fully applied to the force sensor.

[0011] In an optional solution, the hollow area is circular and the force-bearing disk is circular.

[0012] In an optional solution, the three sensor fixing blocks are distributed on a concentric circle, so that the three pressure sensors are distributed on a concentric circle.

[0013] In an optional solution, the included angle between two adjacent pressure sensors is 120 degrees.

[0014] In an optional solution, the device further includes a processing module, which is communicatively connected to the three pressure sensors, and is used to calculate the center of gravity coordinates of the tester based on the pressure values ​​of the three pressure sensors and the positional relationship between the three pressure sensors.

[0015] In an optional solution, the device further comprises: a force plate foot and a plurality of chassis foots;

[0016] A force plate foot is arranged below each sensor fixing block; the plurality of chassis foots are arranged below the chassis; and the height of the chassis foot is adjustable.

[0017] In an optional solution, a vertical bracket is provided on the chassis; the device also includes an armrest, one end of the armrest is mounted on the upper end of the bracket, and the other end of the armrest is mounted on the chassis.

[0018] The present invention also provides a method for locating the center of gravity. Based on the above device, the method comprises:

[0019] The tester stands at any position of the force plate and clicks the test start button to obtain M groups of pressure data from three pressure sensors within the set timing. M center-of-gravity coordinates are calculated based on the positional relationship between the M groups of data and the three pressure sensors. The M center-of-gravity coordinates are averaged to obtain the tester's initial center-of-gravity coordinates. The initial center-of-gravity coordinates are used as the test center of the device.

[0020] In an optional solution, the three pressure sensors are evenly distributed on a concentric circle, and each center of gravity coordinate is calculated according to the following formula:

[0021]

[0022] Wherein, (xy) is the coordinate of the center of gravity, N1, N2, N3 represent the values ​​of each group of three pressure sensors; W is the weight of the tester, W = N1 + N2 + N3, R represents the radius of the concentric circle, θ = 60 degrees.

[0023] In the optional solution, after clicking the test start button, 60 sets of data are obtained within 3 seconds.

[0024] The beneficial effects of the present invention are:

[0025] The present invention calculates the center of gravity value through three pressure sensors, obtains the pressure data of M groups of three pressure sensors within the set timing, and then calculates the average center of gravity value, so that the center of gravity value can be adjusted in time with the change of the tester's standing position. As long as the tester stands on the force plate, no matter where he stands, the position can be defaulted to the center of the test device. This not only facilitates the test and training of the tester, but also avoids the test and training errors caused by the standing position problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, in which like reference numerals generally represent like components.

[0027] Figure 1 The figure is a front structural schematic diagram of a chassis and a force-bearing plate of a device for balance training in one embodiment of the present invention.

[0028] Figure 2 The figure is a schematic diagram of the back structure of a chassis and a force-bearing plate of a device for balance training in one embodiment of the present invention.

[0029] Figure 3 Schematic diagram of the overall structure of a device for balance training in one embodiment of the present invention.

[0030] Figure 4 It is a schematic diagram of the principle of calculating the center of gravity coordinates in the center of gravity positioning method in one embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1-force plate; 2-pressure sensor; 3-sensor fixing block; 4-force plate foot; 5-chassis foot; 6-butterfly nut; 7-chassis; 8-bracket; 9-armrest; 10-display screen. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description and drawings, the advantages and features of the present invention will become clearer. However, it should be noted that the concept of the technical solution of the present invention can be implemented in a variety of different forms and is not limited to the specific embodiments described herein. The drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0034] It should be understood that when an element or layer is referred to as being "on, adjacent to, connected to or coupled to other elements or layers, it may be directly on, adjacent to, connected to or coupled to other elements or layers, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on, directly adjacent to, directly connected to or directly coupled to other elements or layers, there may be no intervening elements or layers. It should be understood that, although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be represented as a second element, component, region, layer or part.

[0035] Spatially relative terms such as "under," "below," "below," "under," "above," "above," etc., may be used herein for ease of description to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that in addition to the orientations shown in the figures, the spatially relative terms are intended to include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, then the elements or features described as "under other elements" or "under" or "under" will be oriented as "on" the other elements or features. Therefore, the exemplary terms "under" and "under" may include both upper and lower orientations. The device may be oriented otherwise (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0036] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present invention. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0037] Example 1

[0038] Reference Figures 1 to 3 , this embodiment provides a device for balance training, including:

[0039] A chassis 7, wherein the center of the chassis 7 is hollowed out;

[0040] Three sensor fixing blocks 3 are arranged below the chassis 7 near the hollow area;

[0041] Three pressure sensors 2 are respectively mounted on three sensor fixing blocks 3;

[0042] A force-bearing plate 1 is located in the hollow area of ​​the chassis 7 and above the pressure sensor 2;

[0043] There is a gap between the outer periphery of the force-bearing disk 1 and the inner wall of the bottom plate 7 , so that the force of the force-bearing disk 1 is fully applied to the pressure sensor 2 .

[0044] Specifically, in the present embodiment, the chassis 7 and the force-bearing disk 1 are both plate-shaped, and the thickness of the two is the same. The hollow area in the center of the chassis 7 is circular, and the force-bearing disk 1 is circular. There is a certain gap between the outer periphery of the force-bearing disk 1 and the inner wall of the chassis 7. Three sensor fixing blocks 3 are installed below the chassis 7 near the hollow area; the three sensor fixing blocks 3 are distributed on a concentric circle and are evenly distributed. A pressure sensor 2 is provided on each of the three sensor fixing blocks 3, and the three pressure sensors 2 are evenly distributed on a concentric circle, and the angle between two adjacent pressure sensors is 120 degrees. The force-bearing disk 1 is installed on the three pressure sensors 2. There is a gap between the force-bearing disk 1 and the chassis 7 to ensure that the force of the force-bearing disk 1 is fully applied to the three pressure sensors 2 and is not affected by the chassis 7.

[0045] In this embodiment, the device further includes a processing module, which is communicatively connected to the three pressure sensors, and is used to calculate the center of gravity coordinates of the tester according to the pressure values ​​of the three pressure sensors and the positional relationship between the three pressure sensors.

[0046] In this embodiment, the device further includes: a force plate foot 4 and a plurality of chassis foots 5; a force plate foot 4 is arranged under each sensor fixing block 3; the plurality of chassis foots 5 are arranged under the chassis 7; the height of the chassis foot 5 is adjustable. Ensure that the three force plate foots 4 are all on the ground, and then adjust the chassis foots 5 around the chassis 7 to the ground, and do not adjust the height too much, so that the chassis foots 5 can be adjusted to the ground naturally, and then locked with the butterfly nut 6.

[0047] A vertical bracket 8 is provided on the chassis 7; the device further comprises an armrest 9, one end of which is mounted on the upper end of the bracket 8, and the other end of the armrest 9 is mounted on the chassis 7. A display screen 10 is also provided on the top of the bracket 8, and the display screen is connected to the processing module.

[0048] Example 2

[0049] Reference Figure 4This embodiment provides a method for locating the center of gravity. Based on the device described in Embodiment 1, the method includes:

[0050] The tester stands at any position of the force plate and clicks the test start button to obtain M groups of pressure data from three pressure sensors within the set timing. M center-of-gravity coordinates are calculated based on the positional relationship between the M groups of data and the three pressure sensors. The M center-of-gravity coordinates are averaged to obtain the tester's initial center-of-gravity coordinates. The initial center-of-gravity coordinates are used as the test center of the device.

[0051] In this embodiment, the three pressure sensors are evenly distributed on a concentric circle, and the coordinates of each center of gravity are calculated according to the following formula:

[0052]

[0053] Wherein, (xy) is the coordinate of the center of gravity, N1, N2, N3 represent the values ​​of each group of three pressure sensors; W is the weight of the tester, W = N1 + N2 + N3, R represents the radius of the concentric circle, θ = 60 degrees. In this embodiment, the force-bearing disk is circular, and the three pressure sensors are located exactly on the circle formed by the outer circumference of the force-bearing disk, and R represents the radius of the force-bearing disk.

[0054] Figure 4 Point P in is any point in the plane, and (x, y) represents the position coordinates of the point. According to the pressure sensor data information, the position information of any point in the plane is calculated. For a given object or person, when standing on the test disc, the weight of the object or person is fixed, that is, the weight W is the sum of the three pressure sensor data. That is, W = N1 + N2 + N3. According to the principle of moment balance, in the equilibrium state, the sum of the moments of all the forces acting on the platform is zero.

[0055] X direction:

[0056] W*x+N 1 *0+N 2 *Rsinθ-N 3 *Rsinθ=0

[0057]

[0058] Y direction:

[0059] W*y+N 1 *RN 2 *Rcosθ-N 3 *Rcosθ=0

[0060]

[0061] Where W = N 1 +N 2+N 3 .

[0062] Therefore, the coordinates of the center of gravity trajectory are

[0063] After clicking the test start button, data is collected every 50ms within 3 seconds, and a total of 60 sets of center of gravity data are obtained. The average of the 60 sets of center of gravity coordinates is taken to obtain the tester's initial center of gravity coordinates; the initial center of gravity coordinates are used as the test center of the device.

[0064] In this embodiment, before the formal training test, the sensor calibration step is also included, specifically: the first time a 10 kg weight is placed in the center of the force plate 1, and the system automatically records. The second time a 20 kg weight is placed in the center of the force plate 1, and the system automatically records. Then use the 10 kg weight to move back and forth, left and right on the force plate 1, and record the distance, and then input the moved distance into the system. The system will automatically compare and adjust the weight and distance parameters to eliminate the influence of environmental factors such as the ground, chassis, deadweight, etc. on the sensor.

[0065] Standing static balance rehabilitation training:

[0066] The user stands at any position on the test platform and clicks the test start button. The screen displays a countdown of 3 seconds. The center of gravity data is obtained by the three pressure sensors on the test platform sensing the different pressures generated by the contact between the foot and the test platform. The center of gravity value is obtained according to this center of gravity algorithm, with one center of gravity value every 50ms. The countdown is 3 seconds for a total of 60 sets of center of gravity data. After the initial center of gravity is calculated from these 60 sets of center of gravity values, the test and training begins.

[0067] Sitting static balance rehabilitation training:

[0068] The user sits at any position on the test platform and clicks the test start button. The screen displays a countdown of 3 seconds. The center of gravity data is obtained by the three pressure sensors on the test platform sensing the different pressures generated by the contact between the user's buttocks and the test platform. The center of gravity value is obtained according to this center of gravity algorithm, with one center of gravity value every 50ms. The countdown is 3 seconds for a total of 60 sets of center of gravity data. After the initial center of gravity is calculated from these 60 sets of center of gravity values, the test and training begins.

[0069] The present invention calculates the center of gravity value through three pressure sensors, obtains the pressure data of M groups of three pressure sensors within the set timing, and then calculates the average center of gravity value, so that the center of gravity value can be adjusted in time with the change of the tester's standing position. As long as the tester stands on the force plate, no matter where he stands, the position can be defaulted to the center of the test equipment. This not only facilitates the test and training of the tester, but also avoids the test and training errors caused by the standing position problem. In particular, when the user performs static tests multiple times, since the static test itself requires the user to stand still, a small standing position error may lead to a huge gap in the test results, which has a significant impact on the analysis of the center of gravity trajectory diagram of multiple tests, etc., and the use of this method can effectively avoid these problems. Each trajectory starts from the origin, and the starting point of the trajectory diagram coincides, which can more effectively judge the user's balance ability and design a training method that is more suitable for the user.

[0070] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A device for balance training, characterized in that: include: A chassis, wherein the center of the chassis is hollowed out; Three sensor fixing blocks are arranged below the chassis near the hollow area; Three pressure sensors are respectively mounted on the three sensor fixing blocks; A force-bearing plate, located in the hollow area of ​​the chassis and above the pressure sensor; There is a gap between the outer periphery of the force-bearing disk and the inner side wall of the chassis, so that the force of the force-bearing disk is fully applied to the force sensor.

2. The device for balance training according to claim 1, characterized in that The hollow area is circular, and the force-bearing disk is circular.

3. The device for balance training according to claim 2, characterized in that The three sensor fixing blocks are distributed on a concentric circle, so that the three pressure sensors are distributed on a concentric circle.

4. The device for balance training according to claim 3, characterized in that The included angle between two adjacent pressure sensors is 120 degrees.

5. The device for balance training according to claim 1, characterized in that The device further comprises a processing module, which is in communication connection with the three pressure sensors, and is used for calculating the center of gravity coordinates of the tester according to the pressure values ​​of the three pressure sensors and the positional relationship between the three pressure sensors.

6. The device for balance training according to claim 1, characterized in that The device also includes: a force plate foot and a plurality of chassis foots; A force plate foot is arranged below each sensor fixing block; the plurality of chassis foots are arranged below the chassis; and the height of the chassis foot is adjustable.

7. The device for balance training according to claim 1, characterized in that A vertical bracket is arranged on the chassis; the device also includes an armrest, one end of the armrest is mounted on the upper end of the bracket, and the other end of the armrest is mounted on the chassis.

8. A method for locating the center of gravity, based on the device according to any one of claims 1 to 7, characterized in that: The method comprises: The tester stands at any position of the force plate and clicks the test start button to obtain M groups of pressure data from three pressure sensors within the set timing. M center-of-gravity coordinates are calculated based on the positional relationship between the M groups of data and the three pressure sensors. The M center-of-gravity coordinates are averaged to obtain the tester's initial center-of-gravity coordinates. The initial center-of-gravity coordinates are used as the test center of the device.

9. The method for locating the center of gravity as claimed in claim 8, characterized in that: The three pressure sensors are evenly distributed on a concentric circle, and the coordinates of each center of gravity are calculated according to the following formula: Wherein, (xy) is the coordinate of the center of gravity, N1, N2, N3 represent the values ​​of each group of three pressure sensors; W is the weight of the tester, W = N1 + N2 + N3, R represents the radius of the concentric circle, θ = 60 degrees.

10. The method for locating the center of gravity according to claim 8, characterized in that: After clicking the test start button, 60 sets of data are obtained within 3 seconds.

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