Load control unit, training system, and braking force control method
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Filing Date
- 2025-12-16
- Publication Date
- 2026-06-16
Abstract
Description
Load control unit, training system, and braking force control method
[0001] The present invention relates to a load control unit, a training system, and a braking force control method.
[0002] Patent document 1 describes an exercise evaluation device that, when teaching is set, displays a target bar indicating a target amount of operation according to elapsed time and a monitor bar indicating the actual amount of operation of the operating unit.
[0003] Japanese Patent No. 4071357
[0004] The exercise evaluation device described in Patent Document 1 does not set a target operation amount in consideration of the user's physical characteristics, etc.
[0005] An object of the present disclosure is to provide a load control unit, a training system, and a braking force control method that are capable of applying additional braking force at an appropriate stroke for each user.
[0006] To solve the above-mentioned problems, one aspect of the present disclosure provides a load control unit for applying an additional braking force to a load posed by a weight in a weight stack-type training device in which the weight reciprocates vertically. The load control unit includes: a control unit that controls the magnitude of the additional braking force by adjusting the strength of a magnetic field applied to a magnetorheological fluid to change the viscosity of the magnetorheological fluid; and an adjustment unit that adjusts a load waveform indicating the variation of the additional braking force. After a user performs the reciprocating movement a predetermined number of times, the adjustment unit adjusts the load waveform by determining a load end position, which is the end position of the load waveform, based on at least one or more maximum values of the stroke, or by determining a load start position, which is the start position of the load waveform, based on at least one or more minimum values of the stroke. The control unit controls the magnitude of the additional braking force in accordance with the load waveform adjusted by the adjustment unit.
[0007] In order to solve the above problems, a braking force control method according to one aspect of the present disclosure is a braking force control method using a load control unit that applies additional braking force to the load caused by a weight in a weight stack-type training device in which the weight moves back and forth in a vertical direction, and includes an adjustment step of adjusting the load waveform by determining a load end position, which is the end position of a load waveform indicating the displacement of the additional braking force, based on at least one or more maximum values of stroke, or determining a load start position, which is the start position of the load waveform, based on at least one or more minimum values of stroke, after the user has performed the back and forth movement a predetermined number of times, and a control step of controlling the magnitude of the additional braking force in line with the load waveform adjusted in the adjustment step by adjusting the strength of a magnetic field applied to the magnetorheological fluid to change the viscosity of the magnetorheological fluid.
[0008] According to one aspect of the present disclosure, additional braking force can be applied at a stroke appropriate for each user.
[0009] FIG. 1 is a schematic diagram showing the overall configuration of a training system according to an embodiment of the present disclosure. FIG. 2 is a block diagram showing the configuration of a load control unit and a display device according to an embodiment. FIG. 3 is a schematic diagram showing the general configuration of a training apparatus in which a load control unit according to an embodiment is disposed. FIG. 4 is a cross-sectional view of the load control unit taken along line IV-IV of FIG. 3. FIG. 5 is a flowchart showing an example of the flow of control in a training system according to an embodiment. FIG. 6 is a diagram showing an example of a change in stroke when adjusting a braking force added by a load control unit according to an embodiment. FIG. 7 is a graph showing an example of load waveforms before and after adjustment of a braking force added by a load control unit according to an embodiment. FIG. 8 is a diagram showing manual adjustment of a load start position and a load end position by an adjustment unit according to an embodiment.
[0010] A training system 1 according to an embodiment of the present disclosure will be described below with reference to FIGS.
[0011] [Configuration of the Training System] First, the general configuration of the training system 1 will be described with reference to Figures 1 and 2. Figure 1 is a schematic diagram showing the overall configuration of the training system 1. Figure 2 is a block diagram showing the configuration of a load control unit 10 and a display device 20.
[0012] 1, the training system 1 includes a load control unit 10 and a display device 20. The load control unit 10 is a device for applying a braking force that is added to the load exerted by a weight 141 (described later) of the training device 100.
[0013] Training machine 100 has seat 300 for the user to sit on and handles 301 for the user to grasp with both hands to push open or lift up. Display device 20 is supported by support device 200 attached to training machine 100.
[0014] 2, the load control unit 10 has a control unit 15, an adjustment unit 16, a storage unit 17, and a communication unit 18. The control unit 15 controls each part of the load control unit 10. The control unit 15 also controls the magnitude of the braking force added to the load by the weight 141.
[0015] Furthermore, adjustment unit 16 adjusts a load waveform that indicates a change in the braking force added to the load by weight 141. Storage unit 17 stores various data used for controlling load control unit 10. Communication unit 18 is connected to be able to communicate with communication unit 25 of display device 20 via short-range wireless communication such as Bluetooth (registered trademark).
[0016] The display device 20 is, for example, a communication device such as a smartphone or a tablet carried by a user. The display device 20 includes a processing unit 21, a touch panel 22, a display 23, a memory 24, and a communication unit 25.
[0017] The processing unit 21 controls each unit of the display device 20. The touch panel 22 is arranged on the screen of the display 23, detects a pressed position on the screen, and outputs the detected position to the processing unit 21. The display 23 is a display screen such as a liquid crystal display or an organic EL (Electro Luminescence) display, and displays images. The memory 24 stores a dedicated application in advance. The communication unit 25 is connected to the communication unit 18 of the load control unit 10 so as to be able to communicate with it.
[0018] [Configuration of Training Apparatus] Next, the general configuration of the training apparatus 100 will be described with reference to Figures 3 and 4. Figure 3 is a schematic diagram showing the general configuration of the training apparatus 100 in which the load control unit 10 is arranged. Figure 4 is a cross-sectional view of the load control unit 10 of Figure 3 taken along line IV-IV. For ease of explanation, the up-down direction, left-right direction, and front-rear direction of the training apparatus 100 are defined below as shown by the arrows in Figures 3 and 4.
[0019] 3 and 4, the training device 100 has a weight stack structure in which multiple weights 141 are stacked. The weights 141 are used as loads for the training device 100 via cables and pulleys, allowing for a variety of training styles depending on the type of training. This allows the user to perform effective muscle training.
[0020] The training device 100 is a weight stack type training device in which the weight 141 moves back and forth in the vertical direction, i.e., up and down, in response to the user's training movements. When the user pulls the handle 301, the cable is pulled out and the weight 141 rises. When the user pushes the handle 301 to return it to its original position, the cable is released and the weight 141 descends. This reciprocating movement of the weight 141, rising and descending, is counted as one cycle. When the user subsequently pulls the handle 301 to continue training and start the second reciprocating movement of the weight, the weight 141 rises again before reaching its initial position before the start of training. The difference in distance between the position of the weight 141 as it reciprocates and its initial position is called the "stroke."
[0021] The training device 100 allows a specific weight to be set by stacking multiple weights 141 to form a weight stack 140. The resistance control unit 10 detects the movement of the weight stack 140 in real time. The resistance control unit 10 then applies additional damping force to the weight selected by the user. This allows the user to fine-tune the resistance.
[0022] As shown in FIG. 3, the training device 100 has a right frame 111, an upper frame 112, a left frame 113, a lower frame 114, a cable 120, a pulley 131, a pulley 132, a pulley 133, a pulley 134, a weight stack 140, a lift shaft 151, a left guide shaft 152, and a right guide shaft 153.
[0023] The upper frame 112, the left frame 113, and the lower frame 114 form the framework for supporting the weight stack 140. The right frame 111 and the left frame 113 extend in the vertical direction and are connected by the upper frame 112 and the lower frame 114.
[0024] The cable 120 is used by the user to apply resistance to his or her body for training. One end 121 of the cable 120 is connected to a handle that the user holds with his or her hand. The other end 122 of the cable 120 is fixed to the upper frame 112.
[0025] Each of the pulleys 131 to 134 has a rotatable structure and is arranged to allow smooth movement of the cable 120. The pulley 134 is hung on the cable 120 and connected to the tip of the lift shaft 151. When one end 121 of the cable 120 is pulled, the pulley 134 rises because the other end 122 of the cable 120 is fixed to the upper frame 112. As the pulley 134 rises, the lift shaft 151 also rises.
[0026] The user can select any weight by replacing the pin P, allowing for quick and easy load adjustment. The lift shaft 151 is located in the center of the weight stack 140 and generates training load by raising and lowering it. The left guide shaft 152 and the right guide shaft 153 complement the lift shaft 151 and maintain the overall balance and stability of the weight stack 140.
[0027] The load control unit 10 is placed directly below the weight stack 140. This placement allows the load control unit 10 to detect the movement of the weight stack 140 in real time and make accurate load adjustments. The load control unit 10 can be retrofitted to training equipment already installed in a training facility, allowing for flexible compatibility with existing equipment.
[0028] This makes it easy to upgrade training equipment, allowing users to perform more effective training using the load control unit 10. The load control unit 10 may also be installed in training equipment before it is installed in a training facility, and may also be applied to newly introduced training equipment.
[0029] [Configuration of Load Control Unit] Next, the load control unit 10 will be described in detail with reference to Fig. 4. As shown in Fig. 4, the load control unit 10 includes a reel 11, a cable 12, a rotation detection unit 13, a magnetorheological fluid device 14, and a control unit 15.
[0030] The reel 11 has a rotating shaft member 11a. The cable 12 is connected to the lift shaft 151. The reel 11 is arranged to be rotatable around the rotating shaft member 11a as a rotation axis. The cable 12 is wound around the reel 11.
[0031] When the lift shaft 151 is raised, the cable 12 is unwound from the reel 11. On the other hand, when the lift shaft 151 is lowered, the cable 12 is wound onto the reel 11.
[0032] The rotation detection unit 13 detects the amount and direction of rotation of the rotating shaft member 11a and transmits the detection results to the control unit 15. The rotation detection unit 13 is, for example, a rotary encoder. The rotary encoder transmits a pulse signal corresponding to the amount of rotation of the rotating shaft member 11a to the control unit 15. The control unit 15 controls the rotation of the reel 11 based on the number of pulses transmitted from the rotation detection unit 13.
[0033] Alternatively, a magnetic sensor or an optical sensor may be used as the rotation detector 13. The magnetic sensor detects the movement of a magnet attached to the rotating shaft member 11a and detects the amount and direction of rotation. The magnetic sensor transmits a control signal corresponding to the rotation of the rotating shaft member 11a to the controller 15.
[0034] The magnetorheological fluid device 14 includes a magnetorheological fluid 14 a and a container 14 b. The container 14 b contains the magnetorheological fluid 14 a. The magnetorheological fluid 14 a has a characteristic that its viscosity changes depending on the strength of the applied magnetic field.
[0035] An opening 14c is provided in the front surface of the container 14b. The rear portion 11b of the rotating shaft member 11a is inserted into the container 14b through the opening 14c. The magnetorheological fluid device 14 applies a braking force to the rear portion 11b of the rotating shaft member 11a inserted in the container 14b by changing the viscosity of the magnetorheological fluid 14a.
[0036] Specifically, the magnetorheological fluid device 14 has a rotor to which the rotating shaft member 11a is fixed and a coil that applies a magnetic field to the rotor. A magnetic field is generated when a current flows through the coil. This magnetic field changes the viscosity of the magnetorheological fluid 14a. The change in viscosity of the magnetorheological fluid 14a applies a braking force that prevents rotation of the rotor, i.e., rotation of the rear portion 11b of the rotating shaft member 11a. The prevention of rotation of the rotating shaft member 11a prevents rotation of the reel 11.
[0037] The control unit 15 is a device for comprehensively controlling each component of the load control unit 10. The control unit 15 changes the viscosity of the magnetorheological fluid 14a by adjusting the strength of the magnetic field applied to the magnetorheological fluid 14a, for example, using PWM control. The control unit 15 adjusts the braking force applied to the rear portion 11b of the rotating shaft member 11a to precisely adjust the training load.
[0038] The control unit 15 realizes the training load set by the user by controlling the operation of the magnetorheological fluid device 14 based on the detection result by the rotation detection unit 13. The control unit 15 can adjust the load in real time according to the progress of the training or changes in the load.
[0039] A laser range finder 19 is provided at the front of the load control unit 10. The laser range finder 19 measures the distance to the weight 141 into which the user has inserted a pin P, out of the multiple weights 141 included in the weight stack 140. Based on this measurement result, the control unit 15 calculates the total weight of the weights 141 lifted by the user. This makes it possible to appropriately manage the load during training.
[0040] [Function of Load Control Unit] Next, the function of the load control unit 10 will be described with reference to Figures 3 and 4. When using the training device 100, the user determines the total weight by selecting each weight 141 to be lifted. Then, the user inserts a pin P through the pin insertion hole 141a of the lowest weight 141 of the weights 141 to be lifted and the pin insertion hole 151a of the lift shaft 151.
[0041] When a user grips the handles (not shown) of the training device 100 with both hands and performs a training motion, the lift shaft 151 rises, and the weights 141 selected by the user also rise.
[0042] When the user starts a training movement, the lift shaft 151 rises, and the cable 12 connected to the lower end thereof also rises. At this time, the cable 12 is pulled out from the reel 11. When the cable 12 is pulled out from the reel 11, the rotary shaft member 11a of the reel 11 rotates.
[0043] The rotation detection unit 13 detects the amount and direction of rotation of the rotating shaft member 11a and transmits the detection result to the control unit 15. Based on the detection result by the rotation detection unit 13, the control unit 15 transmits to the magnetorheological fluid device 14 an instruction to change the strength of the magnetic field applied to the magnetorheological fluid 14a.
[0044] Based on instructions from the control unit 15, the magnetorheological fluid device 14 changes the strength of the magnetic field applied to the magnetorheological fluid 14a, thereby changing the viscosity of the magnetorheological fluid 14a, thereby generating additional braking force to prevent rotation of the rear part 11b of the rotating shaft member 11a.
[0045] [Control Flow in Training System] Next, the control flow in the training system 1 will be described with reference to the flowchart in Fig. 5. As shown in Fig. 5, first, the processing unit 21 of the display device 20 determines whether or not the user has operated the touch panel 22 to log in to a dedicated application (S1).
[0046] The processing unit 21 repeats step S1 until the user logs in to the application on the display device 20 (S1: NO), and when the user logs in to the application (S1: YES), a selection screen is displayed on the display 23 to allow the user to select a training mode (S2).
[0047] The selection screen displays a screen for selecting various modes, such as "beginning high mode" and "final high mode." The "beginning high mode" is a mode in which a braking force that is maximum in the first half of the distance that the weight 141 moves upward is applied. The "final high mode" is a mode in which a braking force that is maximum in the second half of the distance that the weight 141 moves upward is applied.
[0048] After step S2, the display device 20 determines whether or not the training mode has been selected (S3). The display device 20 repeats step S3 until the training mode is selected (S3: NO). On the other hand, when the training mode is selected by the user (S3: YES), the processing unit 21 starts the load control unit 10 based on a start signal sent from the communication unit 25 to the communication unit 18 (S4).
[0049] After step S4, the user starts training by moving the selected weights 141 up and down in a reciprocating manner by operating the handle 301. The user moves the weights 141 up and down in a reciprocating manner from the first to the fourth time.
[0050] Next, the adjustment unit 16 of the load control unit 10 determines whether or not the user has reciprocated the weight 141 four times (S5). If the number of reciprocating movements of the weight 141 is less than four (S5: NO), the adjustment unit 16 repeats step S5.
[0051] On the other hand, if the number of reciprocating movements of the weight 141 reaches four (S5: YES), the adjustment unit 16 determines whether the difference between the largest and smallest values among the maximum values of the three strokes is equal to or smaller than a first threshold value (S6). If the difference between the largest and smallest values among the maximum values of the three strokes is greater than the first threshold value (S6: NO), the adjustment of the load waveform is stopped (S8) and the process returns to step S5. The first threshold value is set to, for example, 10 cm.
[0052] If the difference between the largest and smallest of the three maximum stroke values is equal to or smaller than a first threshold (S6: YES), the adjustment unit 16 determines whether the difference between the largest and smallest of the three minimum stroke values is equal to or smaller than a second threshold (S7), and if the difference between the largest and smallest of the three minimum stroke values is greater than the second threshold (S7: NO), the adjustment of the load waveform is discontinued (S8) and the process returns to step S5. The second threshold is set to, for example, 10 cm.
[0053] On the other hand, if the difference between the largest and smallest minimum values of the three strokes is less than or equal to the second threshold value (S7: YES), the adjustment unit 16 adjusts the load waveform of the additional braking force (S9: adjustment step).
[0054] Here, Fig. 6 is a diagram showing an example of a change in stroke when adjusting the braking force added by the load control unit 10. Fig. 7 is a graph showing an example of a load waveform before and after adjustment of the braking force added by the load control unit 10. The memory unit 17 stores, as a specified value, a load waveform before adjustment in which the magnitude of the braking force changes in a mountain shape as the stroke increases, as shown by the dotted line in Fig. 7.
[0055] 6, at the time when the fourth reciprocating movement W4 is completed, the adjustment unit 16 determines the median value of the maximum value F1 of the first stroke St1, the maximum value F2 of the second stroke St2, and the maximum value F3 of the third stroke St3 in chronological order as the load end position. The load end position is the end position of the load waveform of the additional braking force.
[0056] Furthermore, the adjustment unit 16 determines the median value of the minimum value G1 of the first stroke St1, the minimum value G2 of the second stroke St2, and the minimum value G3 of the third stroke St3 in chronological order as the load start position. The load start position is the start position of the load waveform of the additional braking force. Thus, in step S6, the adjustment unit 16 adjusts the load waveform of the additional braking force so that the load start position is shifted back as shown by arrow 8A in FIG. 7 and the load end position is shifted back as shown by arrow 8B in FIG. 7. This allows for stroke-dependent control of the additional braking force, taking into account the user's physique, muscle strength, and the like.
[0057] 5, after step S9, the adjustment unit 16 stores the adjusted load waveform in the storage unit 17 (S10). After step S10, the user operates the handle 301 to start training by moving the weight 141 back and forth.
[0058] During training, the control unit 15 controls the magnitude of the additional braking force by adjusting the strength of the magnetic field applied to the magnetorheological fluid 14a in accordance with the load waveform adjusted by the adjustment unit 16, thereby changing the viscosity of the magnetorheological fluid 14a (S11: control step).
[0059] 8 is a diagram showing manual adjustment of the load start position and load end position by the adjustment unit 16. During training, the load start position and load end position can be adjusted by the user operating the touch panel 22. Here, the operation of the touch panel 22 is not limited to the user, and may also be performed by, for example, a trainer who provides training guidance to the user.
[0060] That is, the adjustment unit 16 adjusts the load start position based on the horizontal movement of the cursor key C1 shown in Fig. 8. The adjustment unit 16 adjusts the load end position based on the horizontal movement of the cursor key C2. The adjustment unit 16 may also adjust the peak value based on the vertical and horizontal movement of the cursor key C3.
[0061] Thereafter, the control unit 15 determines whether the training has ended based on whether an operation to end the training has been performed on the touch panel 22 (S12). When the user wishes to end the training, the user operates the touch panel 22 to stop the load control unit 10 via the communication unit 25.
[0062] The control unit 15 repeats step S12 until the training is completed (S12: NO), and when the training is completed by the user operating the touch panel 22 (S12: YES), the control unit 15 ends the flow shown in FIG.
[0063] [Effects of the Embodiment] According to the training system 1 of the present embodiment described above, after the user reciprocates the weight 141 a predetermined number of times (four times in this case), the adjustment unit 16 determines the load end position of the load waveform based on the median of the maximum values of the three strokes, and determines the load start position based on the median of the minimum values of the three strokes. This makes it possible to determine an appropriate load waveform taking into account the user's physique, muscle strength, etc. This allows the control unit 15 to apply additional braking force with a stroke appropriate for each user.
[0064] Furthermore, the adjustment unit 16 determines the load end position based on the median of the maximum values F1, F2, and F3 of the three strokes, so that the stroke position can be appropriately adjusted with a minimum number of times, taking into account the characteristics of each user, such as their physique and muscle strength.
[0065] Furthermore, if the difference between the largest and smallest values of the three stroke maximum values F1, F2, and F3 is greater than the first threshold value (S6: NO), the adjustment unit 16 stops adjusting the load waveform (S8), thereby enabling more accurate adjustment of the load waveform.
[0066] Furthermore, the user can adjust the load start position and load end position by operating the touch panel, allowing fine adjustment of the load waveform during training.
[0067] [Other Embodiments] In the above-described embodiment, the training system 1 is used by a user to perform training, but this is not limiting. For example, the user may use the training system 1 to perform rehabilitation, or to play a game.
[0068] In the above embodiment, the load waveform of the additional braking force is adjusted by the adjustment unit 16 after the user has reciprocated each weight 141 four times, but this is not limiting. For example, the load waveform of the additional braking force may be adjusted by the adjustment unit 16 after the user has reciprocated each weight 141 five or more times, or the load waveform of the additional braking force may be adjusted by the adjustment unit 16 after the user has reciprocated each weight 141 three times.
[0069] In the above embodiment, the adjustment unit 16 determines the median of the maximum values of the stroke as the load end position and the median of the minimum values of the stroke as the load start position, but this is not limited to this. The adjustment unit 16 may determine the average value of the maximum values of three strokes as the load end position and the average value of the minimum values of three strokes as the load start position. The number of strokes used when determining the load end position and the load start position may be four or two.
[0070] [Summary] A load control unit according to a first aspect of the present disclosure is a load control unit for applying an additional braking force to a load posed by a weight in a weight stack-type training device in which the weight reciprocates vertically, the load control unit including: a control unit that controls the magnitude of the additional braking force by adjusting the strength of a magnetic field applied to a magnetorheological fluid to change the viscosity of the magnetorheological fluid; and an adjustment unit that adjusts a load waveform indicating the variation of the additional braking force. After the user performs the reciprocating movement a predetermined number of times, the adjustment unit adjusts the load waveform by determining a load end position, which is the end position of the load waveform, based on at least one or more local maximum values of the stroke, or by determining a load start position, which is the start position of the load waveform, based on at least one or more local minimum values of the stroke, and the control unit controls the magnitude of the additional braking force in accordance with the load waveform adjusted by the adjustment unit.
[0071] According to the above configuration, after the user has reciprocated the weight a predetermined number of times, the adjustment unit determines the load end position of the load waveform based on at least one or more maximum values of the stroke, or determines the load start position of the load waveform based on at least one or more minimum values of the stroke, making it possible to determine an appropriate load waveform according to the user's physique, muscle strength, etc. This allows the control unit to provide additional control force with an appropriate stroke for each user.
[0072] In a load control unit according to a second aspect of the present disclosure, in the first aspect described above, the adjustment unit may adjust the load waveform by determining the load end position and the load start position.
[0073] According to the above configuration, the adjustment unit determines the load end position and the load start position, so that it is possible to determine an appropriate load waveform according to the user's physique, muscle strength, etc. The control unit can adjust the stroke position taking into account the characteristics of each user, such as the physique and muscle strength, etc. This allows the control unit to provide additional control force with an appropriate stroke for each user.
[0074] In a load control unit according to a third aspect of the present disclosure, in the first or second aspect described above, the adjustment unit may determine the median of the maximum values of the plurality of strokes as the load end position.
[0075] According to the above configuration, the adjustment unit determines the load end position based on the median of the maximum values of multiple strokes, so that the stroke position can be adjusted taking into account the characteristics of each user, such as their physique and muscle strength.
[0076] In a load control unit according to a fourth aspect of the present disclosure, in any one of the first to third aspects, the adjustment unit may determine the median of the minimum values of the plurality of strokes as the load start position.
[0077] According to the above configuration, the adjustment unit determines the load start position based on the median of the minimum values of multiple strokes, so that the stroke position can be adjusted taking into account the characteristics of each user, such as their physique and muscle strength.
[0078] In a load control unit according to a fifth aspect of the present disclosure, in any one of the first to fourth aspects, the predetermined number of times is at least three. The adjustment unit may determine the median value of the at least three maximum values as the load end position.
[0079] According to the above configuration, the adjustment unit determines the load end position based on the median of the maximum values of at least three strokes, so that the stroke position can be appropriately adjusted with a minimum number of repetitions, taking into account the characteristics of each user, such as their physique and muscle strength.
[0080] In a load control unit according to aspect 6 of the present disclosure, in any of aspects 1 to 5 above, the adjustment unit may adjust the load waveform if, after the user has performed the reciprocating movement the predetermined number of times, the difference between the largest and smallest values of the maximum value of the stroke is less than or equal to a first threshold value, and may stop adjusting the load waveform if the difference is greater than the first threshold value.
[0081] According to the above configuration, the adjustment unit stops adjusting the load waveform when the difference between the largest and smallest values of the stroke's maximum value is greater than the first threshold value, thereby enabling more accurate adjustment of the load waveform.
[0082] A training system according to a seventh aspect of the present disclosure is a training system including the load control unit according to any one of the first to sixth aspects and a display device capable of communicating with the load control unit, wherein the display device includes a display that displays a load waveform indicating a variation in the additional braking force based on the load start position and the load end position adjusted by the adjustment unit, and a touch panel provided on a screen of the display, and the adjustment unit is capable of adjusting the load start position and the load end position based on an operation of the touch panel.
[0083] According to the above configuration, the user can adjust the load start position and load end position by operating the touch panel, thereby making it possible to fine-tune the load waveform during training.
[0084] A braking force control method according to aspect 8 of the present disclosure is a braking force control method using a load control unit that applies additional braking force to the load caused by a weight in a weight stack-type training device in which the weight moves back and forth in a vertical direction, and includes an adjustment step of adjusting the load waveform by determining a load end position, which is the end position of a load waveform indicating the displacement of the additional braking force, based on at least one or more maximum values of stroke, or determining a load start position, which is the start position of the load waveform, based on at least one or more minimum values of stroke, after the user has performed the back and forth movement a predetermined number of times, and a control step of controlling the magnitude of the additional braking force in line with the load waveform adjusted in the adjustment step by adjusting the strength of a magnetic field applied to the magnetorheological fluid to change the viscosity of the magnetorheological fluid.
[0085] According to the above configuration, in the adjustment step, after the user has reciprocated the weight a predetermined number of times, the load end position of the load waveform is determined based on at least one or more maximum values of the stroke, or the load start position is determined based on at least one or more minimum values of the stroke. This makes it possible to determine a load waveform with an appropriate additional braking force, taking into account the user's physique, muscle strength, etc. Then, in the control step, the magnitude of the additional load is controlled in accordance with the load waveform adjusted in the adjustment step, thereby making it possible to apply an additional load with an appropriate stroke for each user.
[0086] A braking force control method according to a ninth aspect of the present disclosure may be the same as in the eighth aspect, wherein the load waveform is adjusted by determining the load end position and the load start position in the adjusting step.
[0087] According to the above configuration, the load end position and load start position of the load waveform are determined in the adjustment step. Therefore, it is possible to determine a load waveform of an appropriate additional braking force taking into consideration the user's physique, muscle strength, etc. Then, in the control step, the magnitude of the additional load is controlled in accordance with the load waveform adjusted in the adjustment step, thereby making it possible to apply additional braking force with an appropriate stroke for each user.
[0088] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.
[0089] REFERENCE SIGNS LIST 1 Training system 10 Load control unit 14a Magnetorheological fluid 15 Control unit 16 Adjustment unit 20 Display device 22 Touch panel 23 Display 100 Training equipment 140 Weight stack 141 Weight
Claims
1. A load control unit installed on a training device, which controls the load applied to the user of the training device, A control unit controls the magnitude of the load by adjusting the strength of the magnetic field applied to the magnetoviscous fluid, thereby changing the viscosity of the magnetoviscous fluid. An adjustment unit for adjusting the load waveform that shows the displacement of the load, Equipped with, The adjustment unit is, After the user has performed a predetermined number of back-and-forth movements of the training device, the load waveform is adjusted by determining the load end position, which is the end position of the load waveform, based on the maximum value of at least one stroke, or by determining the load start position, which is the start position of the load waveform, based on the minimum value of at least one stroke. The control unit, A load control unit that controls the magnitude of the load in accordance with the load waveform adjusted by the adjustment unit.
2. A load control unit that provides additional braking force to the load by the weights in a weight stack type training device in which the weights move back and forth in the vertical direction, A control unit controls the magnitude of the additional braking force by adjusting the strength of the magnetic field applied to the magnetoviscous fluid, thereby changing the viscosity of the magnetoviscous fluid. An adjustment unit for adjusting the load waveform that shows the displacement of the additional braking force, Equipped with, The adjustment unit is, After the user has performed the reciprocating movement a predetermined number of times, the load waveform is adjusted by determining the load end position, which is the end position of the load waveform, based on at least one maximum stroke value, or by determining the load start position, which is the start position of the load waveform, based on at least one minimum stroke value. The control unit, A load control unit that controls the magnitude of the additional braking force in accordance with the load waveform adjusted by the adjustment unit.
3. The adjustment unit is, A load control unit according to claim 1 or 2, which adjusts the load waveform by determining the load end position and the load start position.
4. The adjustment unit is, The load control unit according to claim 1 or 2, wherein the median value of the maximum values of the multiple strokes is determined to be the load termination position.
5. The adjustment unit is, The load control unit according to claim 1, wherein the median value of the minimum values of the plurality of strokes is determined to be the load start position.
6. The predetermined number of times is at least three times. The adjustment unit is, The load control unit according to claim 4, wherein the median of at least three of the maximum values is determined to be the load termination position.
7. The adjustment unit is, A load control unit according to claim 1 or 2, wherein, after the user has performed the reciprocating movement a predetermined number of times, the load waveform is adjusted if the difference between the largest and smallest values at the maximum value of the stroke is less than or equal to a first threshold, and the adjustment of the load waveform is stopped if it is greater than the first threshold.
8. The load control unit described in claim 3, A display device capable of communicating with the aforementioned load control unit, A training system equipped with, The aforementioned display device is A display that shows a load waveform indicating the displacement of the load or additional braking force based on the load start position and load end position adjusted by the adjustment unit, A touch panel provided on the screen of the aforementioned display, It has, The adjustment unit is, A training system in which the load start position and the load end position can be adjusted based on the operation of the touch panel.
9. A braking force control method using a load control unit installed on a training device and which controls the load applied to the user of the training device, After the user has moved the training device back and forth a predetermined number of times, the adjustment step involves adjusting the load waveform by determining the load end position, which is the end position of the load waveform indicating the displacement of the load, based on the maximum value of at least one stroke, or by determining the load start position, which is the start position of the load waveform, based on the minimum value of at least one stroke. A control step that controls the magnitude of the load in accordance with the load waveform adjusted in the adjustment step by changing the viscosity of the magnetoviscous fluid by adjusting the strength of the magnetic field applied to the magnetoviscous fluid, A braking force control method including the following.
10. The braking force control method according to claim 9, wherein the load waveform is adjusted by determining the load end position and the load start position in the adjustment step.