KR102397949B1 - Trampoline device capable of measuring momentum and a method for deriving a three-dimensional position using the same - Google Patents

Abstract

An embodiment of the present invention provides a technique for precisely measuring the amount of exercise of a user performing a repetitive action and at the same time simplifying the configuration of a device for this purpose. The trampoline device capable of measuring the amount of momentum according to an embodiment of the present invention has a contact surface that is a surface that a user comes into contact with, and when an action force, which is a force by the user acting on the contact surface, is provided to the contact surface, the shape changes, and when the action force is resolved an elastic pad part restored to its initial shape; an imaging unit that is formed to be spaced apart from the imaging surface, which is a surface formed on the opposite side of the contact surface in the elastic pad unit, and collects an imaging image that is an image of the imaging surface that is changed when a force is repeatedly applied to the contact surface; a support part for supporting the elastic pad part; and an analysis module for quantitatively analyzing the amount of exercise that is energy for the user's muscle strength by analyzing the captured image received from the imaging unit.

Description

A trampoline device capable of measuring momentum and a method for deriving a three-dimensional position using the same

The present invention relates to a trampoline device capable of measuring the amount of exercise for a user and a method for deriving a user's three-dimensional position using the same, and more particularly, precisely measuring the amount of exercise of a user performing repetitive actions, At the same time, it relates to a technique for simplifying the device configuration for this purpose.

A trampoline is a device having a resilient mat, and a person can jump on the mat or perform a predetermined motion. Such trampolines are used for purposes such as children's play, life sports, gymnastics, and the like, and the rate of its spread is increasing in recent years.

Existing trampolines have only a jumping function and do not have the ability to quantitatively measure the amount of exercise like a treadmill. There is a problem that it is difficult to install.

In Korean Patent Registration No. 10-1675548 (Title of the Invention: An exercise device capable of measuring momentum and a method of measuring momentum using the same), a fixing part fixed to the ground; an exercise unit in which a part of the fixed unit is rotatably or movably installed to rotate or move according to a user's movement; a magnetic material that is fixedly installed on the moving part and generates a magnetic field; and a cradle that is fixed to the fixed part and is mounted on a mobile terminal that measures the amount of movement of the user based on a change characteristic of a magnetic field according to rotation or movement of the movement part and a magnetic body. .

Republic of Korea Patent Registration No. 10-1675548

An object of the present invention for solving the above problems is to measure the exercise amount of the user while maintaining the mechanical durability of the trampoline.

In addition, it is an object of the present invention to precisely measure the amount of exercise of a user performing repetitive actions, and to simplify the configuration of a device for this purpose.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

The configuration of the present invention for achieving the above object is provided with a contact surface that is a surface that a user comes into contact with, and when an action force that is a force by the user acting on the contact surface is provided to the contact surface, the shape changes, and the action force When this is resolved, the elastic pad portion is restored to the initial shape; an imaging unit which is formed to be spaced apart from the imaging surface, which is a surface formed on the opposite side of the contact surface in the elastic pad part, and collects an imaging image that is an image of the imaging surface that is changed when the applied force is repeatedly applied to the contact surface; a support part for supporting the elastic pad part; and an analysis module for quantitatively analyzing the amount of exercise, which is energy for the user's muscle strength, by analyzing the captured image received from the imaging unit; When providing, by measuring the shape and position change of the contact shadow that is the shadow on the user's body part by the captured image, it is characterized in that the three-dimensional position change on the user's body part is derived.

In an embodiment of the present invention, the analysis module may calculate the amount of movement of the user by using the elastic modulus of the elastic pad part and the amount of change in the three-dimensional position of the contact shadow.

In an embodiment of the present invention, the analysis module is an elastic pad mask, which is a mask for defining an area of the elastic pad, which is one object, in the captured image, and a mask for defining the contact shadow area, which is another object. Each area can be extracted by creating a shadow mask.

In an embodiment of the present invention, the analysis module converts the captured image into YUV data composed of a luminance signal (Y) and color difference signals (U, V), and then, an elastic pad color difference image, which is an image based on the V color difference signal. can be extracted.

In an embodiment of the present invention, the analysis module may extract the elastic pad binarization image by converting the elastic pad color difference image into a binarized image.

In an embodiment of the present invention, the analysis module may remove noise from the binarized image of the elastic pad to generate the elastic pad mask and extract the elastic pad part region.

In an embodiment of the present invention, the analysis module converts the captured image into YUV data composed of a luminance signal (Y) and a color difference signal (U, V), and then the shadow which is an image by the luminance signal and the color difference signal A color difference image can be extracted.

In an embodiment of the present invention, the analysis module may extract the shadow binarization image by converting the shadow color difference image into a binarized image.

In an embodiment of the present invention, the analysis module generates the shadow mask by performing a binary image operation using the image of the elastic pad region and the shadow binarization image, thereby determining the contact shadow region in the elastic pad region. can be extracted.

In an embodiment of the present invention, a lighting unit for irradiating light toward the imaging surface may be further included.

In an embodiment of the present invention, the support part includes a frame formed along an edge of the elastic pad part and coupled to the elastic pad part to support the elastic pad part, and a support body coupled to the frame to support the frame; can be provided

The configuration of the present invention for achieving the above object is the x and y coordinates of the center point of the contact shadow, respectively measured when the elastic pad part and the contact moment on the part of the user's body are determined, and the length of the contact shadow measuring a reference length, which is a reference length, and a reference distance, which is a distance between the elastic pad unit and the imaging unit; measuring an action length that is the length of the contact shadow measured when it is determined that the action force is being provided; and extracting the z-coordinate of the center point of the contact shadow by using the ratio of the reference length to the working length and the reference distance.

In an embodiment of the present invention, the length of the contact shadow may be measured as the length of the longest line connecting one point and another point in the contact shadow area and passing through the center point of the contact shadow.

The effect of the present invention according to the above configuration is that the user's exercise amount is measured using the image change of the trampoline pad without forming a complex sensor configuration, so that the measurement can be performed while maintaining the mechanical durability of the device.

In addition, an effect of the present invention is that the user's exercise amount can be quantitatively and precisely measured by quantitatively measuring the image change of the marker according to the user's exercise.

In addition, an effect of the present invention is that the user's exercise amount is measured by analyzing the image after performing imaging with a single camera without using a stereo camera, so that the configuration of the device is simplified and the cost is reduced.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view of a trampoline device according to an embodiment of the present invention.
2 is a side view of a trampoline device according to an embodiment of the present invention.
3 is a photographed image related to the elastic pad unit and a color difference image of the elastic pad according to an embodiment of the present invention.
4 is an image from which noise is removed from the elastic pad binarization image and the elastic pad binarization image according to an embodiment of the present invention.
5 is a shadow color difference image and a shadow binarization image according to an embodiment of the present invention.
6 is an image of an elastic pad part and a contact shadow area according to an embodiment of the present invention.
7 is a schematic diagram of a process of extracting x and y coordinates of a contact shadow according to an embodiment of the present invention.
8 is a schematic diagram of a z-coordinate extraction process of a contact shadow according to an embodiment of the present invention.
9 is a captured image according to whether or not an action force is provided according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be “connected (connected, contacted, coupled)” with another part, it is not only “directly connected” but also “indirectly connected” with another member interposed therebetween. "Including cases where In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a trampoline device according to an embodiment of the present invention, and FIG. 2 is a side view of the trampoline device according to an embodiment of the present invention.

1 and 2, the trampoline device of the present invention includes a contact surface 120 that is a surface that a user contacts, and an action force that is a force by the user acting on the contact surface 120 is provided to the contact surface 120 The elastic pad part 100 which has a variable shape and is restored to its initial shape when the action force is released; An image of the imaging surface 110 that is formed spaced apart from the imaging surface 110 , which is a surface formed on the opposite side of the contact surface 120 in the elastic pad part 100 , and that changes when an action force is repeatedly applied to the contact surface 120 . an imaging unit 310 for collecting images; a support part 400 for supporting the elastic pad part 100; and an analysis module 500 for quantitatively analyzing the amount of exercise that is energy for the user's muscle strength by analyzing the captured image received from the imaging unit 310 . In addition, the trampoline apparatus of the present invention may further include a lighting unit 320 for irradiating light toward the imaging surface (110). And, the support part 400 is formed along the edge of the elastic pad part 100 and is coupled to the elastic pad part 100 to support the elastic pad part 100, the frame 410 and the frame 410 are combined. A support 420 for supporting the frame 410 may be provided.

The frame 410 and the support 420 may be formed of metal or synthetic resin, the frame 410 may have a circular or polygonal shape, and the support 420 is disposed along the circumferential direction of the frame 410 . It may be formed to support the frame 410 .

In addition, the elastic pad part 100 may be formed of a material having elasticity, such as rubber or synthetic resin, and the elastic pad part 100 and the frame 410 may be directly coupled to each other. Alternatively, a plurality of springs are disposed at the edge of the elastic pad part 100 and the plurality of springs are coupled to the frame 410 to connect the elastic pad part 100 and the frame 410 to the elastic pad part 100 to form a frame. 410 may be supported.

The lighting unit 320 may be formed along the circumferential direction of the imaging unit 310 . In addition, the lighting unit 320 may be formed of an LED. As shown in FIG. 1 , the outer side of the imaging unit 310 may have a cylindrical shape, and the lighting unit 320 may have a cylindrical shape along the outer shape of the imaging unit 310 correspondingly. . When the shape of the imaging unit 310 and the illumination unit 320 is formed as described above, the installation space of the imaging unit 310 and the illumination unit 320 is minimized and the imaging unit 310 and the illumination unit 320 are integrated. Installation of the elastic exercise device of the present invention may be easy.

In an embodiment of the present invention, although it has been described that the imaging unit 310 and the lighting unit 320 are formed as described above, it is not limited thereto, and the imaging unit 310 is formed in a different shape and a plurality of illumination units 320 . may be formed by being disposed along the circumferential direction of the imaging unit 310 .

The imaging unit 310 may include an element such as a CCD, but is not limited to this example. In addition, the imaging unit 310 may be formed of at least one or more, and the imaging unit 310 may include a wide-angle lens. Although a plurality of imaging units 310 may be formed, in the trampoline apparatus of the present invention, the configuration may be simplified by using one imaging unit 310 .

3 is a captured image and an elastic pad color difference image related to the elastic pad unit 100 according to an embodiment of the present invention, and FIG. 4 is an elastic pad binarization image and noise in the elastic pad binarization image according to an embodiment of the present invention. The image has been removed. Here, Fig. 3 (a) is for the captured image, and Fig. 3 (b) is for the elastic pad color difference image. And, Fig. 4 (a) is for the elastic pad binarization image, Fig. 4 (b) is the image expansion operation for noise removal of the elastic pad binarization image, Figure 4 (c) is erosion after the expansion operation It is a computed image.

5 is a shadow color difference image and a shadow binarization image according to an embodiment of the present invention, and FIG. 6 is an image of the elastic pad unit 100 and the contact shadow 200 region according to an embodiment of the present invention. . Here, Fig. 5 (a) is for a shadow color difference image, and Fig. 5 (b) is for a shadow binarization image. And, Fig. 6 (a) shows the contact shadow 200 area as an image after performing binary image operation on the elastic pad mask and the shadow binarization image, and Fig. 6 (b) is the elastic pad part 100 area. and the contact shadow 200 region located therein.

When an action force is provided to the elastic pad part 100 made of a color and translucent material, the shape and position change of the contact shadow 200, which is a shadow on a part of the user's body, is measured by the captured image, and on the part of the user's body A three-dimensional position change can be derived. Details on this will be described below. And, in the embodiment of the present invention, although it is described that the elastic pad part 100 is formed in a translucent red color, the color of the elastic pad part 100 is not limited thereto. As described above, since the elastic pad part 100 is made of a translucent material, as shown in FIG. The shape of a part of the user's body can be clearly detected as a contact shadow 200 by the imaging unit 310 through the elastic pad unit 100 . Here, both feet of the user come into contact with the contact surface 120 , but the contact shadow 200 may be a shadow for each of both feet of the user. Hereinafter, it is the same.

In addition, a plurality of times of action force is applied to the elastic pad part 100 so that the elastic pad part 100 is deformed in shape a plurality of times, and while the shape and position of the contact shadow 200 reflected on the elastic pad part 100 is changed. , the imaging unit 310 may transmit the photographed image to the analysis module 500 by photographing the imaging surface 110 of the elastic pad unit 100 per unit time. Here, the unit time may be in units of milliseconds (milliseconds, ms), and of course, imaging may be performed in units smaller than units of milliseconds (ms) in order to improve precision.

In the trampoline device of the present invention, in order to measure the shape and position change of the contact shadow 200, the elastic pad part 100 region and the contact shadow 200 region are extracted from the captured image, and the elastic pad part 100 region of the Since it is possible to derive a three-dimensional position change of the contact shadow 200, that is, a three-dimensional position change on a part of the user's body, by using the shape change and the shape and position change of the contact shadow 200 region, this will be described in detail below. to explain

As shown in FIGS. 3 to 6 , the analysis module 500 includes an elastic pad mask that is a mask that defines an area of the elastic pad part 100 as one object in the captured image, and a contact shadow 200 that is another object. ), each region can be extracted by creating a shadow mask, which is a mask that limits the region. In addition, the trampoline device of the present invention may use the elastic pad mask when generating the shadow mask after first generating the elastic pad mask.

First, as shown in (a) of FIG. 3 , the distortion correction unit provided in the analysis module 500 removes the distortion of the captured image when the captured image is transmitted, thereby performing distortion correction on the captured image. . The distortion compensation unit can process lens system distortion, image (image) distortion, image (image) coordinate distortion, etc., and such camera calibration and distortion correction are by the prior art, and detailed descriptions will be omitted. do.

And, as shown in (b) of FIG. 3, the analysis module 500 converts the captured image into YUV data composed of a luminance signal (Y) and color difference signals (U, V), and then An image of the elastic pad color difference image can be extracted. Here, the analysis module 500 may include a color gamut conversion unit for outputting image data converted through color space conversion with respect to RGB data of the captured image. The color gamut conversion unit may receive the captured image from the distortion compensating unit and convert the color gamut from the RGB area to the YUV area. Accordingly, the RGB data of the captured image is converted into a luminance signal (Y) and a color difference signal (U, V). ) can be converted into YUV data composed of In addition, the color gamut conversion unit may extract a V color difference signal (V Channel) from the YUV data. Accordingly, as shown in (b) of FIG. 3 , an image of the elastic pad unit 100 having a predetermined color may be image-processed to be highlighted in the captured image, and a color difference image of the elastic pad may be extracted.

Next, as shown in FIG. 4A , the analysis module 500 may convert the elastic pad color difference image into a binarized image to extract the elastic pad binarized image. Here, the analysis module 500 may include a binarization processing unit that performs a binarization process on the color difference image of the elastic pad, which is the image received from the color gamut conversion unit. The binarization processing unit performs binarization on the color difference image of the elastic pad using the Otsu algorithm, and a flexible threshold is set according to the environment through the Otsu algorithm in this way, which is called the elastic pad unit 100. A region of an object may be extracted. In an embodiment of the present invention, it is described that the binarization processing unit performs binarization on the color difference image of the elastic pad using the Otsu algorithm, but the present invention is not limited thereto, and various known methods for generating a binarized image may be used. .

Then, as shown in (b) and (c) of Fig. 4, the analysis module 500 removes noise from the elastic pad binarization image to generate an elastic pad mask and extract the elastic pad part 100 region. can As shown in Fig. 4 (a), it can be confirmed that noise is present at the boundary of the elastic pad binarization image. Such noise is due to inaccurate detection of the boundary of the elastic pad part 100 and needs to be removed because it may reduce the measurement accuracy of the elastic pad part 100 region.

The analysis module 500 may include a noise removing unit for removing noise from the binarized image of the elastic pad. The noise removing unit can remove the noise existing at the boundary of the elastic pad binarized image by performing a morphological operation. To this end, a dilation operation as shown in FIG. 4(b) and FIG. 4 The erosion operation as shown in (c) of (c) can be sequentially performed. In the noise removal unit, first, an expansion operation is performed to remove the noise (noise) of the binarized image of the elastic pad, and then an erosion operation is performed with an area smaller than the area of the elastic pad unit 100 before processing, so that noise in the outer region of the image can be removed. An elastic pad mask is generated by performing the algorithm as described above, and an image of the area of the elastic pad unit 100 can be extracted by applying the elastic pad mask.

As described above, while extracting the area of the elastic pad unit 100, the analysis module 500 converts the captured image into YUV data composed of a luminance signal (Y) and a color difference signal (U, V) to generate a shadow mask. After setting, it is possible to extract the shadow color difference image, which is an image by the luminance signal and the color difference signal. The captured image here is the same image as the captured image used for extracting the above-described elastic pad color difference image.

The color gamut conversion unit that extracts the elastic pad color difference image from the captured image received as described above may perform color gamut conversion on the RGB data of the same captured image to convert it into YUV data. In addition, as shown in FIG. 5A , the color gamut conversion unit may perform a mixing operation using the luminance signal Y, the U color difference signal, and the V color difference signal for contrast for binarization. Accordingly, a shadow color difference image can be extracted.

Next, as shown in FIG. 5B , the analysis module 500 may extract the shadow binarization image by converting the shadow color difference image into a binarized image. The binarization processing unit that generated the elastic pad binarization image as described above may receive the shadow color difference image after extracting the elastic pad binarization image, and perform binarization on the shadow color difference image using the Otsu algorithm. In this way, a fluid threshold according to the environment is set through the Otsu algorithm, and the region of the object called the contact shadow 200 can be extracted. In the embodiment of the present invention, it is described that the binarization processing unit performs binarization on the shadow color difference image using Otsu's algorithm, but the present invention is not limited thereto, and various known methods for generating a binarized image may be used.

Then, as shown in Fig. 6 (a), the analysis module 500 generates a shadow mask by performing a binary image operation using the area image of the elastic pad part 100 and the shadow binarization image, and the elastic pad part It is possible to extract the contact shadow (200) area within the (100) area. Here, the analysis module 500 may include a binary image operation unit that performs binary image operation. Here, the binary image operation unit may perform a binary image operation using a hole filling algorithm, but is not limited thereto. In the binary image operation unit, in order to extract the contact shadow 200 region image within the elastic pad part 100 region, the shadow mask is generated by generating a binary image using the elastic pad part 100 region image and the shadow binarization image. generated, and by applying such a shadow mask, an image of the contact shadow 200 region can be extracted. Specifically, as shown in FIG. 6 (b), the contact shadow 200 in the elastic pad part 100 region ), a final extracted image that is a region image can be extracted.

When the final extracted image is extracted from the captured image as described above, the analysis module 500, based on the center point of the elastic pad part 100 region in the final extracted image, the elastic pad part 100 area boundary line (Contour) and 3D coordinates of the contact shadow 200 region boundary are generated, and the 3D coordinates of x, y, and z of the center point of the contact shadow 200 can be extracted using this. Here, each coordinate may be calculated by a pixel coordinate value.

Hereinafter, such a three-dimensional coordinate extraction process, that is, a method for deriving a three-dimensional position change using the trampoline apparatus of the present invention will be described. 7 is a schematic diagram of the x, y coordinate extraction process of the contact shadow 200 according to an embodiment of the present invention, and FIG. 8 is a z coordinate extraction process of the contact shadow 200 according to an embodiment of the present invention. It is a schematic diagram for

In FIG. 7 , the point O represents the center point of the lens of the imaging unit 310 , and the figure including the sides of a', b' and c' represents the image of the elastic pad unit 100 formed on the imaging unit 310 . can And, Figure 8 (a) shows the measurement of the reference length (Len) and the reference distance (Dist), Figure 8 (b) shows the measurement of the working length (Len '), (c) shows the process of calculating the working distance Dist', which is the movement distance in the z-coordinate direction of the contact shadow 200, using the reference length (Len), the reference distance (Dist), and the working length (Len') .

First, the x and y coordinates of the center point of the contact shadow 200 measured when the analysis module 500 determines the contact moment between the elastic pad part 100 and a part of the user's body, the length of the contact shadow 200 is A reference length Len and a reference distance Dist, which is a distance between the elastic pad unit 100 and the imaging unit 310, may be measured. Here, the length of the contact shadow 200 may be measured as the length of the longest line passing through the center point of the contact shadow 200 while connecting one point and another point in the contact shadow 200 region. Hereinafter, it is the same. And, the reference point (0 point) of each of the x, y, and z coordinates may be the center point of the elastic pad part 100 at the position of the first elastic pad part 100 before the contact between the elastic pad part 100 and a part of the user's body. there is.

The moment of contact between the elastic pad part 100 and a part of the user's body may be a moment when the distance between the elastic pad part 100 and the imaging unit 310 changes, and the region of the elastic pad part 100 extracted as described above. It is possible to track the initial position of the elastic pad part 100 using the image, and determine whether to provide an action force by using the shape change of the elastic pad part 100 .

When the user's feet are floating on the elastic pad unit 100 , the image of the contact shadow 200 area is pale, so it may not be easy to track the exact coordinates of the contact shadow 200 . Accordingly, the initial position of the elastic pad part 100 can be tracked by the shape change of the elastic pad part 100 area. Specifically, the analysis module 500 stores the initial shape of the elastic pad part 100 region, and the elastic pad part 100 region boundary line and the elastic pad part 100 are extracted by analyzing the captured image transmitted in real time. When the boundary lines of the initial shape of the region coincide, the analysis module 500 can determine even a state in which no action force is applied to the elastic pad part 100, and the elastic pad part 100 is set to the initial position and shape. It can be judged that there is

And, when an action force is applied to the elastic pad part 100 , the shape of the area of the elastic pad part 100 starts to change, and when the application of the acting force to the elastic pad part 100 is stopped, the elastic pad part 100 . ) since the change in the shape of the region ends, the analysis module 500 starts providing an action force when the boundary line of the elastic pad part 100 and the boundary line of the initial shape of the elastic pad part 100 coincide as described above. Or you can decide to stop.

However, in both cases of start and stop of the provision of the action force, since the boundary line of the area of the elastic pad part 100 and the boundary line of the initial shape of the area of the elastic pad part 100 coincide, for each of the start and stop of the provision of the action force The trampoline device of the present invention may include a position sensor 330 for measuring a change in the depth of the elastic pad part 100 (the distance that the center point of the elastic pad part 100 moves from the reference point). The position sensor 330 may be installed around the elastic pad part 100 . In addition, the position sensor 330 determines the case in which the center point of the elastic pad unit 100 approaches the imaging unit 310 in the positive (+) direction (depth>0) based on the z-coordinate reference point as described above. , a case where the center point of the elastic pad unit 100 is spaced apart from the imaging unit 310 may be determined in a negative (-) direction (depth < 0). In addition, the position sensor 330 may transmit the center point motion information of the elastic pad unit 100 to the analysis module 500 in real time.

When it is analyzed that the shape of the region of the elastic pad part 100 is changed in the analysis module 500 and the depth of the elastic pad part 100 is less than 0 (depth < 0), the analysis module 500 provides an action force This can be considered discontinued. In addition, when it is analyzed that the shape of the area of the elastic pad part 100 changes and the depth of the elastic pad part 100 is greater than 0 (depth>0), the analysis module 500 determines that the action force is being provided. can Here, when it is analyzed that the shape of the elastic pad part 100 does not change and the depth of the elastic pad part 100 is 0, the analysis module 500 determines that the elastic pad part 100 is in the initial position. It is natural to be However, due to the characteristics of the elastic pad part 100 having elasticity, vibration can be performed with a predetermined vibration amplitude even when the application of the action force is stopped, so that the depth of the elastic pad part 100 changes within a predetermined range. When it is measured by the position sensor 330 as that, the analysis module 500 may determine that the provision of the action force to the elastic pad part 100 is stopped.

When it is determined that the action force is being provided by the analysis module 500, the action length Len', which is the length of the contact shadow 200 measured, may be measured. Next, the z-coordinate for the center point of the contact shadow 200 can be extracted using the ratio of the reference length Len and the working length Len' and the reference distance Dist.

Specifically, as described above, by measuring the length change of the contact shadow 200 in the area of the contact shadow 200 in real time, the change in the working length Len' can be measured. And, the change in the working distance Dist' can be measured using the similarity ratio operation, that is, the following [Equation 1]. In addition, such a working distance (Dist') value may be a z-coordinate with respect to the center point of the contact shadow 200 .

[Equation 1]

Len : Len' = Dist : Dist'

Here, Len may mean a reference length, Dist may mean a reference distance, Len' may mean a working length, and Dist' may mean a working distance.

Through the above process, a three-dimensional coordinate change with respect to the center point of the contact shadow 200 may be measured. Here, the analysis module 500, when the working length (Len') forms a maximum value, can determine that the amount of change in the formation of the elastic pad part 100 is the maximum, and also, the working distance (Dist') It can be determined to be the maximum, and in this case, the three-dimensional coordinate value is set as the final coordinate of the contact shadow 200 , and the user's momentum can be calculated using the final coordinate of the contact shadow 200 .

However, since the x and y coordinates of the center point of the contact shadow 200 for each before and after the provision of the actuating force may be changed, the amount of movement of the user may be measured as a three-dimensional displacement of the change of the x, y, and z coordinates, but in the present invention Since the amount of movement of the user is mainly formed in the direction of gravity (the z-axis direction) in the trampoline device of Therefore, the three-dimensional coordinates of the center point of the contact shadow 200 when the operating force is provided are the x-coordinate and y for the center point of the contact shadow 200 measured when the elastic pad part 100 and the contact moment on the user's body part are judged. It may be formed as a z-coordinate with respect to the center point of the contact shadow 200 when the coordinates and the working length Len' are changed.

9 is a captured image according to whether or not an action force is provided according to an embodiment of the present invention. Here, (a) of FIG. 9 is an image of a matter in which the three-dimensional coordinates of the center point of the contact shadow 200 are displayed on the captured image when the action length Len' is the maximum, and (b) of FIG. 9 is the action force When the provision is stopped, as described above, when the boundary line of the area of the elastic pad part 100 and the boundary line of the initial shape of the area of the elastic pad part 100 coincide, the display line (blue thick line) along the boundary line of the area of the elastic pad part 100 is the same. It is an image showing the matter where the line) is formed. As shown in FIG. 9 , the three-dimensional coordinates of the center point of the contact shadow 200 measured as described above, whether the elastic pad unit 100 returns to the initial position, etc. can be displayed by matching the captured image.

The analysis module 500 may calculate the exercise amount of the user by using the elastic modulus of the elastic pad unit 100 and the amount of change in the three-dimensional position of the contact shadow 200 . First, in the analysis module 500, the value of the elastic modulus k (x, y) for each point of the two-dimensional (x, y) contact surface 120 of the elastic pad part may be experimentally measured and stored, and Measured as may be that the elastic modulus is measured by providing an action force at each pixel unit position in the elastic pad unit 100 and measuring the strain at each pixel unit position according to the operating force. And, when moving from the initial position coordinates (x0, y0, z0) of the contact shadow 200 to the coordinates (x(t), y(t), z(t)) at time t, x as above Since it is determined that the coordinates and the y-coordinates are maintained until the contact is released after the elastic pad unit 100 comes into contact with a part of the user's body, k(x, y) values at each position can be measured.

The elastic pad part 100 may have a linear elastic force. Here, the linear elastic force may mean that the elastic force changes linearly at each point of the elastic pad part 100 . As described above, when the elastic pad unit 100 has a linear elastic force, the analysis module 500 substitutes the user's contact position and the user's movement amount into the following [Equation 2] polynomial to obtain energy by the user's muscle strength. can be calculated.

[Equation 2]

Here, W(t) is the user's momentum, t is the shape deformation time of the elastic pad part 100, and k(x, y) is the elastic pad part 100 for the coordinates (x, y) of the contact shadow 200 . ), z(t) may be the amount of movement of the user at time t.

In addition, the elastic pad part 100 may have a non-linear elastic force. Here, the non-linear elastic force may mean that the elastic force changes non-linearly at each point of the elastic pad part 100 . As described above, when the elastic pad unit 100 has a non-linear elastic force, the analysis module 500 substitutes the user's contact position and the user's movement amount into the following [Equation 3] polynomial to obtain energy by the user's muscle strength. can be calculated.

[Equation 3]

Here, W(t) is the user's momentum, t is the shape deformation time of the elastic pad part 100, and k(x, y) is the elastic pad part 100 for the coordinates (x, y) of the contact shadow 200 . ), z(t) may be the amount of movement of the user at time t.

When a plurality of contact shadows 200 are formed, after calculating the user's momentum by each of the plurality of contact shadows 200, an average value for each momentum value may be derived. As described above, since the contact shadow 200 may be a shadow that forms one area, a plurality of user body parts contact the contact surface 120 to form a plurality of contact shadows 200 when the user's momentum is measured. there is. Specifically, as shown in FIGS. 3 to 6 , a contact shadow 200 for each of both feet instead of one foot may be formed. In this case, the analysis module 500 calculates the user's exercise amount by each foot, that is, each contact shadow 200, and derives the average value for each momentum value as the user's exercise amount. can

The analysis module 500 may transmit information on the amount of exercise of the user to a predetermined electronic device used by the user. For convenience, information on the amount of exercise of the user may be transmitted to the electronic device worn by the user. Here, the electronic device may be a smart watch, a smart phone, a tablet PC, a notebook computer, or the like. Information on the user's exercise amount may be converted into data and stored in an electronic device. And, it is possible to build a momentum measurement system including the trampoline device of the present invention formed as described above by using an electronic device or the like.

Hereinafter, a method for measuring the amount of exercise using the trampoline device of the present invention will be described.

First, in the first step, a portion of the user's body is in contact with the contact surface 120 , which is the upper surface of the elastic pad part 100 formed of a color and translucent material, and the lower surface of the elastic pad part 100 and the user It is possible to start collecting the captured image by capturing the contact shadow 200 that is the shadow on the body part of the . And, in the second step, an action force, which is a force by the user, is provided to the elastic pad part 100 , and captured images for the shape change of the elastic pad part 100 and the shape and position change of the contact shadow 200 are collected can be

Next, in the third step, the elastic pad part 100 region can be extracted by creating an elastic pad mask that is a mask that defines the region of the elastic pad part 100 which is one object in the captured image. After that, in a fourth step, a shadow mask that is a mask for limiting the area of the contact shadow 200 that is another object in the captured image may be generated to extract the area of the contact shadow 200 .

In addition, in the fifth step, by using the change in the formation of the elastic pad unit 100 and the change in the three-dimensional coordinates of the center point of the contact shadow 200, it is possible to derive the user's movement amount, which is a three-dimensional position change on a part of the user's body. . And, in the sixth step, the user's movement amount and the elastic modulus of the elastic pad unit 100 may be used to calculate the user's exercise amount.

The above-described steps 1 to 6 may be repeatedly performed to form one cycle, and finally, energy consumed by the user may be derived by summing the amount of exercise of the user derived from each cycle. The rest are the same as those for the trampoline device of the present invention described above.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

100: elastic pad part
110: imaging plane
120: contact surface
200: contact shadow
310: imaging unit
320: lighting unit
330: position sensor
400: support
410: frame
420: support
500: analysis module

Claims (14)

an elastic pad unit having a contact surface that is a surface that a user comes into contact with, the shape is variable when an action force, which is a force by the user acting on the contact surface, is provided to the contact surface, and is restored to an initial shape when the action force is resolved;
an imaging unit that is formed to be spaced apart from an imaging surface, which is a surface formed on the opposite side of the contact surface in the elastic pad unit, and collects an imaging image that is an image of the imaging surface that is changed when the action force is repeatedly applied to the contact surface;
a support part for supporting the elastic pad part; and
and an analysis module for quantitatively analyzing the amount of exercise, which is energy for the user's muscle strength, by analyzing the captured image received from the imaging unit;
When the action force is provided to the elastic pad part of the color and translucent material, the shape and position change of the contact shadow that is the shadow on the user's body part is measured by the captured image, and the 3 on the user's body part Derive a dimensional position change,
The analysis module generates, in the captured image, an elastic pad mask, which is a mask for defining an area of the elastic pad part, which is one object, and a shadow mask, which is a mask for defining the contact shadow area, which is another object, in each area. A trampoline device capable of measuring momentum, characterized in that it extracts.
The method according to claim 1,
The analysis module is a trampoline device capable of measuring the amount of exercise, characterized in that it calculates the amount of movement of the user by using the elastic modulus of the elastic pad part and the amount of change in the three-dimensional position of the contact shadow.
delete The method according to claim 1,
The analysis module converts the captured image into YUV data composed of a luminance signal (Y) and a color difference signal (U, V), and then extracts an elastic pad color difference image, which is an image by the V color difference signal. Measurable trampoline device.
5. The method according to claim 4,
The analysis module converts the color difference image of the elastic pad into a binarized image to extract the binarized image of the elastic pad.
6. The method of claim 5,
wherein the analysis module removes noise from the binarized image of the elastic pad to generate the elastic pad mask and extracts the elastic pad area.
The method according to claim 1,
The analysis module converts the captured image into YUV data composed of a luminance signal (Y) and a color difference signal (U, V), and then extracts a shadow color difference image that is an image by the luminance signal and the color difference signal A trampoline device that can measure the amount of exercise you do.
8. The method of claim 7,
The analysis module converts the shadow color difference image into a binarized image to extract a shadow binarized image.
9. The method of claim 8,
The analysis module generates the shadow mask by performing a binary image operation using the image of the elastic pad region and the shadow binarization image, thereby extracting the contact shadow region in the elastic pad region. This is a possible trampoline device.
The method according to claim 1,
The trampoline apparatus capable of measuring the amount of momentum further comprising an illumination unit irradiating light toward the imaging surface.
The method according to claim 1,
The support part,
a frame formed along an edge of the elastic pad part and coupled to the elastic pad part to support the elastic pad part; and
A trampoline device capable of measuring momentum, characterized in that it comprises a support, coupled to the frame to support the frame.
An exercise amount measuring system comprising a trampoline device capable of measuring the amount of exercise according to any one of claims 1, 2, and 4 to 11.
In the three-dimensional position derivation method using the trampoline device capable of measuring the momentum of claim 1,
The x and y coordinates of the center point of the contact shadow, respectively measured when the elastic pad part and the contact moment on the part of the user's body are determined, the reference length that is the length of the contact shadow, and between the elastic pad part and the imaging unit measuring a reference distance that is a distance;
measuring an action length that is the length of the contact shadow measured when it is determined that the action force is being provided; and
and extracting the z-coordinate of the center point of the contact shadow using the ratio of the reference length and the working length and the reference distance.
14. The method of claim 13,
The length of the contact shadow is measured as the length of the longest line passing through the center point of the contact shadow while connecting one point and another point in the contact shadow area.

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