An abdominal wheel and a method for obtaining its rolling data

Abstract

The present invention relates to an abdominal wheel and a method for obtaining rolling data thereof. The roller is rotatably arranged on the wheel axle along the axial direction of the wheel axle. The first and second Hall sensors are respectively connected to the roller, and the first and second Hall sensors are arranged at a certain distance from each other in the circumferential direction of the wheel axle. The acquisition surfaces of the first and second Hall sensors can rotate synchronously with the roller to form a trajectory. The magnet is connected to the rotating shaft, and the magnet faces the trajectory. The input end of the processor is respectively connected to the induction information output ends of the first and second Hall sensors, and the input end of the processor can obtain the induction information of the first and second Hall sensors. The processor can obtain the rolling data of the roller according to the induction information of the first and second Hall sensors and the set time. The accuracy of obtaining the rolling data of the abdominal wheel is improved.

Description

Technical Field

[0001] The present invention relates to the field of fitness equipment, and specifically to an abdominal wheel and a method for obtaining its rolling data. Background Art

[0002] When a user exercises with an abdominal wheel, one reciprocating roll of the abdominal wheel by the user is counted as one exercise. During the exercise process of the user, there are ineffective rolls, that is, ineffective exercise times, but the existing abdominal wheel still counts this reciprocating roll of the abdominal wheel, that is, miscounts the times. This results in an inability to accurately record the effective exercise times during the user's exercise process. Summary of the Invention

[0003] The purpose of the present invention is to provide an abdominal wheel and a method for obtaining its rolling data that can improve the counting accuracy.

[0004] To achieve the above purpose, the technical solution adopted is: An abdominal wheel, which includes:

[0005] A wheel axle, with both axial ends being holding parts.

[0006] A roller, which is rotatably arranged on the wheel axle along the axial direction of the wheel axle.

[0007] A first Hall sensor and a second Hall sensor, which are respectively connected to the roller, and the first and second Hall sensors are arranged at a certain distance apart in the circumferential direction of the wheel axle. Both the first and second Hall sensors have a collection surface and an induction information output end, and the collection surfaces of the first and second Hall sensors can rotate synchronously with the roller to form a trajectory.

[0008] A magnet, which is connected to the wheel axle, the magnet faces the trajectory, the collection surface of the first Hall sensor can obtain the induction information when it approaches the magnet, and the collection surface of the second Hall sensor can obtain the induction information when it approaches the magnet.

[0009] A processor, which has an input end, the input end is respectively connected to the induction information output ends of the first and second Hall sensors, and the input end of the processor can obtain the induction information of the first and second Hall sensors. The processor can obtain the rolling data of the roller according to the induction information of the first and second Hall sensors and the set time.

[0010] Further, the abdominal wheel further includes:

[0011] A third Hall sensor and a fourth Hall sensor, which are respectively connected to the roller, and the first, second, third, and fourth Hall sensors are evenly spaced in the circumferential direction of the wheel axle.

[0012] The third and fourth Hall sensors each have a collection surface and an induction information output terminal. The collection surfaces of the third and fourth Hall sensors can rotate synchronously with the roller to form a trajectory, so that the third and fourth Hall sensors can respectively obtain the induction information when the magnet approaches.

[0013] The input ends are respectively connected to the induction information output terminals of the third and fourth Hall sensors. The input end of the processor can obtain the induction information of the third and fourth Hall sensors. The processor can obtain the rolling data of the roller according to the induction information of the first, second, third, and fourth Hall sensors and the set time.

[0014] Further, a circular groove is formed on the wheel surface of the roller, and a through hole is opened in the groove.

[0015] The abdominal wheel further includes a display screen.

[0016] The display screen has a receiving end and a screen, and the screen is arranged in the through hole.

[0017] The output end of the processor is connected to the receiving end of the display screen. The receiving end of the display screen can receive the rolling data of the roller and can present the rolling data on the screen of the display screen.

[0018] Further, the abdominal wheel further includes:

[0019] A circuit board, on which a battery, a charging interface, and a function button are connected.

[0020] The battery can supply power to the display screen, the first, second, third, and fourth Hall sensors, and the processor.

[0021] The charging interface is connected to the battery, and the function button can turn on and off the power supply.

[0022] Further, the abdominal wheel further includes:

[0023] A connecting piece, which is connected to the wheel axle. The connecting piece is located in the inner cavity of the roller. The connecting piece has a protruding plate extending radially along the wheel axle.

[0024] A torsion spring, which is arranged in the inner cavity of the roller. The torsion spring is sleeved outside the connecting piece. One end of the torsion spring is connected to the roller, and the other end is connected to the connecting piece.

[0025] Further, two fixing rings are sleeved on the wheel axle. The fixing rings are arranged at intervals along the axial direction of the wheel axle and are located in the inner cavity of the roller. The distance between the two fixing rings corresponds to the axial dimension of the roller to limit the axial sliding of the roller along the wheel axle.

[0026] Further, an installation ring is arranged in the inner cavity of the roller. The outer ring surface of the installation ring is connected to the roller through a spoke plate. One end of the installation ring is connected to the first, second, third, and fourth Hall sensors. The end faces of the acquisition surfaces of the first, second, third, and fourth Hall sensors are located in the same plane and this plane is perpendicular to the axial direction of the wheel axle.

[0027] The connecting piece includes an inner ring and an outer ring.

[0028] The inner ring and the outer ring are connected through an annular plate. The center lines of the inner ring and the outer ring coincide. The inner ring is sleeved on and connected to the wheel axle.

[0029] The outer ring is located in the annular cavity of the installation ring. One end of the outer ring has a protruding plate extending radially along the wheel axle. The plate surface of the protruding plate is parallel to the acquisition surfaces of the first, second, third, and fourth Hall sensors. And the magnet connected to the protruding plate is in clearance fit with this plane in the axial direction of the wheel axle.

[0030] Further, the torsion spring is located in the annular cavity between the installation ring and the outer ring. One end of the torsion spring is connected to the installation ring and the other end is connected to the outer ring.

[0031] The present invention also provides a method for obtaining rolling data of an abdominal wheel, including:

[0032] The roller drives the first and second Hall sensors to rotate synchronously around the axial direction of the wheel axle. The first Hall sensor obtains the first induction information when the magnet approaches.

[0033] The first Hall sensor outputs the first induction information to the processor.

[0034] The processor determines whether the second Hall sensor obtains the second induction information within the first set time range.

[0035] If so, the processor determines whether the second Hall sensor and the first Hall sensor sequentially collect the second induction information and the first induction information within the second set time range.

[0036] If so, the processor counts once and adds one to the total count value.

[0037] If not, delete the first induction information and the second induction information respectively obtained by the first Hall sensor and the second Hall sensor this time, and the first Hall sensor and the second Hall sensor collect the next induction information.

[0038] If not, delete the first induction information collected by the first Hall sensor this time and collect the next induction information.

[0039] Further, the method for obtaining rolling data further includes:

[0040] The roller drives the first, second, third, and fourth Hall sensors to rotate axially synchronously around the wheel axis, and the first, second, third, and fourth Hall sensors obtain the first, second, third, and fourth induction information when the magnet approaches.

[0041] The first, second, third, and fourth Hall sensors respectively output the first, second, third, and fourth induction information to the processor.

[0042] The processor calculates the first, second, third, and fourth rotational speeds between every two of the first, second, third, and fourth Hall sensors passing by the magnet in sequence according to the circumference of the roller and the time of obtaining the first, second, third, and fourth induction information.

[0043] The processor calculates the degree of speed dispersion corresponding to the number of rolls this time based on the first, second, third, and fourth rotational speeds. The processor determines the quality score of this rolling action according to the degree of speed dispersion corresponding to the number of rolls this time.

[0044] Compared with the prior art, the technical effect of the present invention is as follows: By setting two Hall sensors in the present invention, it is avoided that the roller sways back and forth in a single Hall sensor and directly counts. First, the first and second Hall sensors are arranged at a certain distance in the circumferential direction of the wheel axis. After the first Hall sensor obtains the first induction information, within the range of the first set time, the second Hall sensor obtains the second induction information.

[0045] Then, after the processor receives that within the range of the second set time, the second Hall sensor and the first Hall sensor sequentially obtain the second induction information and the first induction information, it counts a reciprocating movement of the roller this time, and this count is valid, thereby improving the accuracy of the abdominal wheel count. Brief Description of the Drawings

[0046] Figure 1 is a schematic three-dimensional structure diagram of the abdominal wheel of the present invention;

[0047] Figure 2 is a cross-sectional view of the abdominal wheel of the present invention;

[0048] Figure 3a is a schematic diagram of the initial state of the abdominal wheel;

[0049] Figure 3b is a schematic diagram of the first Hall sensor corresponding to the magnet during the forward rotation of the roller of the present invention;

[0050] Figure 3c is a schematic diagram of the second Hall sensor corresponding to the magnet during the forward rotation of the roller of the present invention;

[0051] Figure 3d is a schematic diagram of the reverse rotation process of the roller of the present invention;

[0052] Figure 3eSchematic diagram of the second Hall sensor corresponding to the magnet during the reverse rotation of the roller of the present invention;

[0053] Figure 3f Schematic diagram of the first Hall sensor corresponding to the magnet during the reverse rotation of the roller of the present invention;

[0054] Figure 4 Three-dimensional view of the abdominal wheel of the present invention after removing half of the outer shell of the roller;

[0055] Figure 5 is Figure 4 side view of. Detailed implementation manners

[0056] The following describes the detailed implementation manners of the present invention with reference to the accompanying drawings.

[0057] As Figure 1 and 2 shown, the first embodiment of the present invention provides an abdominal wheel, which includes:

[0058] A wheel axle 10, and both axial ends thereof are holding portions 11.

[0059] A roller 20, which is rotatably arranged on the wheel axle 10 along the axial direction of the wheel axle 10.

[0060] A first Hall sensor 51 and a second Hall sensor 52, which are respectively connected to the roller 20, and the first and second Hall sensors 51 and 52 are arranged at a certain distance apart in the circumferential direction of the wheel axle 10. Both the first and second Hall sensors 51 and 52 have a collection surface and an induction information output end, and the collection surfaces of the first and second Hall sensors 51 and 52 can rotate synchronously with the roller 20 to form a trajectory.

[0061] A magnet 40, which is connected to the wheel axle 10, the magnet 40 faces the trajectory, and the collection surface of the first Hall sensor 52 can obtain the induction information when it approaches the magnet 40, and the collection surface of the second Hall sensor 52 can obtain the induction information when it approaches the magnet 40.

[0062] A processor, which has an input end, and the input end is respectively connected to the induction information output ends of the first and second Hall sensors 51 and 52. The input end of the processor can obtain the induction information of the first and second Hall sensors 51 and 52. The processor can obtain the rolling data of the roller 20 according to the induction information of the first and second Hall sensors 51 and 52 and the set time. The rolling data is the number of effective reciprocating movements of the abdominal wheel.

[0063] The first and second Hall sensors 51 and 52 are respectively connected to the roller 20. When the user rolls the ab wheel, the first and second Hall sensors 51 and 52 and the roller 20 rotate synchronously around the axial direction of the wheel shaft 10, and the magnet 40 does not rotate with the wheel shaft 10. Therefore, the acquisition surfaces of the first and second Hall sensors 51 and 52 can rotate synchronously with the roller 20 to form a trajectory, and the acquisition surfaces of the first and second Hall sensors 51 and 52 are all oriented towards the trajectory, so that the first and second Hall sensors 51 and 52 can respectively obtain the induction information when the magnet 40 approaches.

[0064] Based on the first embodiment, the present invention provides a method for obtaining rolling data of an ab wheel. The roller 20 drives the first and second Hall sensors 51 and 52 to rotate synchronously around the axial direction of the wheel shaft 10, and the first Hall sensor 51 obtains the first induction information when the magnet 40 approaches.

[0065] The first Hall sensor 51 outputs the first induction information to the processor.

[0066] The processor determines whether the second Hall sensor 52 obtains the second induction information within the first set time range.

[0067] If so, the processor determines whether the second Hall sensor 52 and the first Hall sensor 51 sequentially collect the second induction information and the first induction information within the second set time range.

[0068] If so, the processor counts once and adds one to the total count value.

[0069] If not, the first induction information and the second induction information respectively obtained by the first Hall sensor 51 and the second Hall sensor 52 this time are deleted, and the first Hall sensor 51 and the second Hall sensor 52 collect the next induction information.

[0070] If not, the first induction information collected by the first Hall sensor 51 this time is deleted, and the next induction information is collected.

[0071] The following combines Figures 3a to 3f Specifically illustrate the working process of the present invention.

[0072] The circumferences of the circles where the first and second Hall sensors 51 and 52 are located are C. The interval distances of the first and second Hall sensors 51 and 52 in the circumferential direction can be 0.15C, 0.3C, 0.4 or 0.5C. Set the interval distances of the first and second Hall sensors 51 and 52 in the circumferential direction according to the actual situation.

[0073] Assume that the radius of the roller 20 is 0.16 m and the circumference of the roller 20 is 0.8 m. The set time includes the first and second set times. The range of the first set time is 0.5 - 4.5 s, and the range of the second set time is 1 - 5 s. Here, an example is given where the first and second Hall sensors 51 and 52 are spaced 0.5C in the circumferential direction.

[0074] See Figure 3a , the user holds the holding parts 11 at both ends of the wheel axle 10 with both hands, and the user pushes the ab wheel forward by 0.15 m. Figure 3a shown, the roller 20 and the first and second Hall sensors 51 and 52 rotate synchronously along the forward direction Fr to Figure 3b the position shown. At this time, the first Hall sensor 51 obtains the first induction information when the magnet 40 approaches.

[0075] The user continues to push the ab wheel forward by 0.4 m. Figure 3b shown, the roller 20 and the first and second Hall sensors 51 and 52 continue to rotate 180° synchronously along the forward direction Fr to Figure 3c shown. At this time, the second Hall sensor 52 obtains the second induction information when the magnet 40 approaches. The time interval for the processor to obtain the first and second induction information is 2 s, and 2 s is within the range of the first set time of 0.5 - 4.5 s. Figure 3c shown, the roller 20 and the first and second Hall sensors 51 and 52 rotate a small angle along the forward direction Fr to Figure 3d the position shown.

[0076] The user continues to push the ab wheel forward by 0.25 m. At Figure 3d the position point of the ab wheel shown, the user pulls the ab wheel backward. Figure 3d shown, the roller 20 and the first and second Hall sensors 51 and 52 rotate synchronously in the reverse direction Rr to Figure 3e the position shown. At this time, the second Hall sensor 52 obtains the second induction information when the magnet 40 approaches for the second time.

[0077] Figure 3e shown, the roller 20 and the first and second Hall sensors 51 and 52 rotate synchronously in the reverse direction Rr to Figure 3f the position shown. At this time, the first Hall sensor 51 obtains the first induction information when the magnet 40 approaches for the second time. Assume that the time interval for the processor to obtain the second induction information and the first induction information is 3 s, and 3 s is within the range of the second set time of 1 - 5 s. The processor counts once and adds one to the total count value.

[0078] If a single Hall sensor is set, when the roller 20 shakes, the first Hall sensor will also obtain the first induction information, and the processor will directly count according to the induction information. However, the number of times recorded in this case is invalid, resulting in an incorrect count of the number of abdominal wheel rotations and an inability to accurately record the number of rounds of the abdominal wheel.

[0079] In the present invention, by setting two Hall sensors, it is avoided that the roller 20 directly counts when shaking back and forth in a single Hall sensor. First, the first and second Hall sensors are arranged at a certain distance in the circumferential direction of the wheel axle 10. After the first Hall sensor 51 obtains the first induction information, within the range of the first set time, the second Hall sensor 52 obtains the second induction information.

[0080] Then, the processor receives that within the range of the second set time, after the second Hall sensor 52 and the first Hall sensor 51 sequentially obtain the second induction information and the first induction information, it counts a reciprocating movement of the roller 20 this time, and this count is effective, thereby improving the accuracy of the abdominal wheel count.

[0081] The model of the processor can be STM32F103C8T6, and the model of the Hall sensor can be WCS1800 or OH9253-S.

[0082] As Figure 4 shown, on the basis of the first embodiment, the second embodiment of the present invention further includes:

[0083] A third Hall sensor 53 and a fourth Hall sensor 54, which are respectively connected to the roller 20, and the first, second, third, and fourth Hall sensors 51, 52, 53, 54 are evenly spaced along the circumferential direction of the wheel axle 10.

[0084] The third and fourth Hall sensors 53, 54 respectively have a collection surface and an induction information output end. The collection surfaces of the third and fourth Hall sensors 53, 54 can rotate synchronously with the roller 20 to form a trajectory, so that the third and fourth Hall sensors 53, 54 can respectively obtain the induction information when the magnet 40 approaches.

[0085] The input ends are respectively connected to the induction information output ends of the third and fourth Hall sensors 53, 54, and the input end of the processor can obtain the induction information of the third and fourth Hall sensors 53, 54. The processor can obtain the rolling data of the roller 20 according to the induction information of the first, second, third, and fourth Hall sensors 51, 52, 53, 54 and the set time.

[0086] A method for obtaining rolling data of an abdominal wheel based on the above embodiments further includes: the roller 20 drives the first, second, third, and fourth Hall sensors 51, 52, 53, and 54 to rotate synchronously around the axial direction of the wheel shaft 10, and the first, second, third, and fourth Hall sensors 51, 52, 53, and 54 obtain the first, second, third, and fourth induction information when the magnet 40 approaches.

[0087] The first, second, third, and fourth Hall sensors 51, 52, 53, and 54 respectively output the first, second, third, and fourth induction information to the processor.

[0088] The processor sequentially calculates the first, second, third, and fourth rotational speeds between every two of the first, second, third, and fourth Hall sensors 51, 52, 53, and 54 passing through the magnet 40 according to the circumference of the roller 20 and the time of obtaining the first, second, third, and fourth induction information.

[0089] The processor calculates the degree of speed dispersion corresponding to the number of times of this roll based on the first, second, third, and fourth rotational speeds.

[0090] The processor determines the quality score of this rolling action according to the degree of speed dispersion corresponding to the number of times of this roll.

[0091] See Figure 5 As shown, the first, second, third, and fourth Hall sensors 51, 52, 53, and 54 are evenly spaced along the circumferential direction of the wheel shaft 10. The interval between the first and second Hall sensors 51 and 52 in the circumferential direction of the wheel shaft 10 is C1, the interval between the second and third Hall sensors 52 and 53 in the circumferential direction of the wheel shaft 10 is C2, the interval between the third and fourth Hall sensors 53 and 54 in the circumferential direction of the wheel shaft 10 is C3, and the interval between the fourth and first Hall sensors 54 and 51 in the circumferential direction of the wheel shaft 10 is C4.

[0092] In this way, the first, second, third, and fourth rotational speeds of the roller 20 in the segments where the circumferences are C1, C2, C3, and C4 can be calculated. In this embodiment, the processor calculates the degree of speed dispersion corresponding to one reciprocating motion of the roller 20 based on the first, second, third, and fourth rotational speeds, that is, obtains the degree of difference between the first, second, third, and fourth rotational speeds.

[0093] Specifically, if the first, second, third, and fourth rotational speeds are relatively close, it indicates that the user's movement is highly stable and the quality score is high. Similarly, if the first, second, third, and fourth rotational speeds differ greatly, it indicates that the user's movement is less stable and the quality score of one reciprocating motion of the user using the abdominal wheel is low. The user can know the quality of the action of using the abdominal wheel, which is convenient for the user to adjust the action with reference to the quality score and improve the exercise effect of the user using the abdominal wheel.

[0094] For example, the variances of the first, second, third, and fourth rotation speeds can be calculated. A first variance range is preset to correspond to a first mass fraction, and a second variance range corresponds to a second mass fraction. The processor calculates the variances of the first, second, third, and fourth rotation speeds. If the calculated variance is within the first variance range, the first mass fraction is obtained, and so on, to obtain the corresponding mass fraction for each time during the entire exercise process of the user.

[0095] The wheel surface of the roller 20 forms an annular groove 21, and a through hole is opened in the groove 21. The detection circuit module further includes a display screen 55. The display screen 55 has a receiving end and a screen, and the screen is disposed in the through hole.

[0096] The output end of the processor is connected to the receiving end of the display screen 55. The receiving end of the display screen 55 can receive the rolling data of the roller 20 and can present the rolling data on the screen of the display screen 55.

[0097] By forming an annular groove 21 on the wheel surface of the roller 20 and disposing the screen of the display screen 55 in the through hole opened in the groove 21, damage to the screen can be avoided during the process of the roller 20 rolling on the ground.

[0098] The model of the display screen 42 is an LCD1602 liquid crystal display.

[0099] The ab wheel further includes: a circuit board, to which a battery, a charging interface 56, and a function button 57 are connected.

[0100] The battery can supply power to the display screen 55, the first, second, third, and fourth Hall sensors 51, 52, 53, 54, and the processor. The charging interface 56 is connected to the battery, and the function button 57 can turn on and off the power supply.

[0101] By providing the charging interface 56, when the charging interface 56 is connected to a power source, the battery can be charged, and the battery can be repeatedly charged and discharged, so that the ab wheel can be continuously used, thereby improving the service life of the ab wheel.

[0102] The ab wheel further includes: a connecting member 30, which is connected to the wheel axle 10. The connecting member 30 is located in the inner cavity of the roller 20, and the connecting member 30 has a protruding plate 31 extending radially along the wheel axle.

[0103] A torsion spring 60 is disposed in the inner cavity of the roller 20. The torsion spring 60 is sleeved outside the connecting member 30. One end of the torsion spring 60 is connected to the roller 20, and the other end is connected to the connecting member 30.

[0104] During the process of the user pushing the ab wheel forward, the torsion spring 60 deforms, and the user will overcome the torsion force of the torsion spring 60, that is, a certain resistance is applied to the user, which can prevent the muscles from being strained due to rapid stretching; when pulling back the ab wheel, the torsion spring 60 restores its deformation to provide assistance, making the ab wheel smoother and easier to pull back. By setting the torsion spring 60, it can assist the user in exercising and improve the exercise effect.

[0105] Two fixing rings 12 are sleeved on the wheel axle 10. The fixing rings 12 are arranged at intervals along the axial direction of the wheel axle 10 and are located in the inner cavity of the roller 20. The distance between the two fixing rings 12 corresponds to the dimension of the roller 20 in the axial direction to limit the axial sliding of the roller 20 along the wheel axle 10.

[0106] Prevent the roller 20 from axially sliding on the wheel axle 10, resulting in poor stability during the process of the user pushing and pulling the ab wheel. By making the distance between the two fixing rings 12 correspond to the dimension of the roller 20 in the axial direction to limit the axial sliding of the roller 20 along the wheel axle 10, the stability during the rotation of the ab wheel is ensured.

[0107] An installation ring 22 is arranged in the inner cavity of the roller 20. The outer ring surface of the installation ring 22 is connected to the roller 20 through a spoke plate 23. One end of the installation ring 22 is connected to the first, second, third, and fourth Hall sensors 51, 52, 53, 54. The end faces of the acquisition surfaces of the first, second, third, and fourth Hall sensors 51, 52, 53, 54 are located in the same plane and this plane is perpendicular to the axial direction of the wheel axle 10.

[0108] The connecting member 30 includes an inner ring 32 and an outer ring 33. The inner ring 32 and the outer ring 33 are connected by an annular plate 34. The center lines of the inner ring 32 and the outer ring 33 coincide. The inner ring 32 is sleeved and connected to the wheel axle 10.

[0109] The outer ring 33 is located in the annular cavity of the installation ring 22. One end of the outer ring 33 has a protruding plate 31 extending radially along the wheel axle 10. The plate surface of the protruding plate 31 is parallel to the acquisition surfaces of the first, second, third, and fourth Hall sensors 51, 52, 53, 54, and the magnet 40 connected to the protruding plate 31 is in clearance fit with this plane in the axial direction of the wheel axle 10.

[0110] Specifically, the torsion spring 60 is located in the annular cavity between the installation ring 22 and the outer ring 33. One end of the torsion spring 60 is connected to the installation ring 22 and the other end is connected to the outer ring 33. Utilizing the annular cavity between the installation ring 22 and the outer ring 33 not only facilitates the layout of the torsion spring 60, but also prevents dirt outside the roller 20 from entering the inner cavity to wear the torsion spring 60, ensuring that the torsion spring 60 is in a stable working state for a long time.

[0111] In addition, one end of the torsion spring 60 is directly connected to the installation ring 22 and the other end is connected to the outer ring 33, reducing the diameter of the torsion spring 60. This not only saves the cost of the ab wheel, but also makes the structure of the ab wheel more compact.

Claims

1. A method for obtaining rolling data based on an abdominal wheel, the method for obtaining rolling data based on an abdominal wheel is implemented based on an abdominal wheel, and the abdominal wheel comprises: a wheel axle (10), with gripping parts (11) at both axial ends thereof; a roller (20), which is rotatably arranged on the wheel axle (10) along the axial direction of the wheel axle (10); a first Hall sensor (51) and a second Hall sensor (52), which are respectively connected to the roller (20), and the first and second Hall sensors (51, 52) are arranged at a certain distance apart in the circumferential direction of the wheel axle (10); both the first and second Hall sensors (51, 52) have a collection surface and an induction information output end, and the collection surfaces of the first and second Hall sensors (51, 52) can rotate synchronously with the roller (20) to form a trajectory; a magnet (40), which is connected to the wheel axle (10), the magnet (40) faces the trajectory, the collection surface of the first Hall sensor (51) can obtain the induction information when it approaches the magnet (40), and the collection surface of the second Hall sensor (52) can obtain the induction information when it approaches the magnet (40); a processor, which has an input end, and the input end is respectively connected to the induction information output ends of the first and second Hall sensors (51, 52), and the input end of the processor can obtain the induction information of the first and second Hall sensors (51, 52); the processor can obtain the rolling data of the roller (20) according to the induction information of the first and second Hall sensors (51, 52) and the set time, further comprising: a third Hall sensor (53) and a fourth Hall sensor (54), which are respectively connected to the roller (20), and the first, second, third, and fourth Hall sensors (51, 52, 53, 54) are evenly spaced in the circumferential direction of the wheel axle (10); the third and fourth Hall sensors (53, 54) respectively have a collection surface and an induction information output end, and the collection surfaces of the third and fourth Hall sensors (53, 54) can rotate synchronously with the roller (20) to form a trajectory, so that the third and fourth Hall sensors (53, 54) can respectively obtain the induction information when the magnet (40) approaches; the input end is respectively connected to the induction information output ends of the third and fourth Hall sensors (53, 54), and the input end of the processor can obtain the induction information of the third and fourth Hall sensors (53, 54); the processor can obtain the rolling data of the roller (20) according to the induction information of the first, second, third, and fourth Hall sensors (51, 52, 53, 54) and the set time, a circular groove (21) is formed on the wheel surface of the roller (20), and a through hole is opened in the groove (21); the abdominal wheel further comprises a display screen (55); the display screen (55) has a receiving end and a screen, and the screen is arranged in the through hole, The output end of the processor is connected to the receiving end of the display screen (55). The receiving end of the display screen (55) can receive the rolling data of the roller (20) and can present the rolling data on the screen of the display screen (55). The abdominal wheel further includes: A circuit board, on which a battery, a charging interface (56) and a function button (57) are connected; The battery can supply power to the display screen (55), the first, second, third, and fourth Hall sensors (51, 52, 53, 54) and the processor; The charging interface (56) is connected to the battery, and the function button (57) can turn on and off the power supply. It further includes: A connecting member (30), which is connected to the wheel axle (10). The connecting member (30) is located in the inner cavity of the roller (20). The connecting member (30) has a protruding plate (31) extending radially along the wheel axle. A torsion spring (60), which is arranged in the inner cavity of the roller (20). The torsion spring (60) is sleeved outside the connecting member (30). One end of the torsion spring (60) is connected to the roller (20), and the other end is connected to the connecting member (30). Two fixing rings (12) are sleeved on the wheel axle (10). The fixing rings (12) are arranged at intervals along the axial direction of the wheel axle (10) and are located in the inner cavity of the roller (20). The distance between the two fixing rings (12) corresponds to the axial dimension of the roller (20) to limit the axial slip of the roller (20) along the wheel axle (10). An installation ring (22) is arranged in the inner cavity of the roller (20). The outer ring surface of the installation ring (22) is connected to the roller (20) through a spoke plate (23). One end of the installation ring (22) is connected to the first, second, third, and fourth Hall sensors (51, 52, 53, 54). The end faces of the acquisition surfaces of the first, second, third, and fourth Hall sensors (51, 52, 53, 54) are in the same plane and this plane is perpendicular to the axial direction of the wheel axle (10). The connecting member (30) includes an inner ring (32) and an outer ring (33); The inner ring (32) and the outer ring (33) are connected by an annular plate (34). The center lines of the inner ring (32) and the outer ring (33) coincide. The inner ring (32) is sleeved and connected to the wheel axle (10). The outer ring (33) is located in the annular cavity of the installation ring (22). One end of the outer ring (33) has a protruding plate (31) extending radially along the wheel axle (10). The plate surface of the protruding plate (31) is parallel to the acquisition surface of the first, second, third, and fourth Hall sensors (51, 52, 53, 54). And the magnet (40) connected to the protruding plate (31) has a clearance fit with this plane in the axial direction of the wheel axle (10). The torsion spring (60) is located in the annular cavity between the installation ring (22) and the outer ring (33). One end of the torsion spring (60) is connected to the installation ring (22), and the other end is connected to the outer ring (33). The method for obtaining the rolling data based on the abdominal wheel is characterized in that: The roller (20) drives the first and second Hall sensors (51, 52) to rotate synchronously around the axial direction of the wheel shaft (10), and the first Hall sensor (51) obtains the first induction information when the magnet (40) approaches; The first Hall sensor (51) outputs the first induction information to the processor; The processor determines whether the second Hall sensor (52) obtains the second induction information within the first set time range; If so, the processor determines whether the second Hall sensor (52) and the first Hall sensor (51) sequentially collect the second induction information and the first induction information within the second set time range; If so, the processor counts once and adds one to the total count value; If not, the first induction information and the second induction information respectively obtained by the first Hall sensor (51) and the second Hall sensor (52) this time are deleted, and the first Hall sensor (51) and the second Hall sensor (52) collect the next induction information; If not, the first induction information collected by the first Hall sensor (51) this time is deleted, and the next induction information is collected, Further included: The roller (20) drives the first, second, third, and fourth Hall sensors (51, 52, 53, 54) to rotate synchronously around the axial direction of the wheel shaft (10), and the first, second, third, and fourth Hall sensors (51, 52, 53, 54) obtain the first, second, third, and fourth induction information when the magnet (40) approaches; The first, second, third, and fourth Hall sensors (51, 52, 53, 54) respectively output the first, second, third, and fourth induction information to the processor; The processor sequentially calculates the first, second, third, and fourth rotational speeds between every two of the first, second, third, and fourth Hall sensors (51, 52, 53, 54) passing through the magnet (40) according to the circumference of the roller (20) and the time of obtaining the first, second, third, and fourth induction information; The processor calculates the speed dispersion corresponding to the number of rolling times this time based on the first, second, third, and fourth rotational speeds; The processor determines the quality score of this rolling action according to the speed dispersion corresponding to the number of rolling times this time.

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