CN115212517A - Method for identifying paddle frequency on rowing machine - Google Patents
Method for identifying paddle frequency on rowing machine Download PDFInfo
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- CN115212517A CN115212517A CN202210939521.8A CN202210939521A CN115212517A CN 115212517 A CN115212517 A CN 115212517A CN 202210939521 A CN202210939521 A CN 202210939521A CN 115212517 A CN115212517 A CN 115212517A
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- rowing machine
- time
- paddle frequency
- angular velocity
- paddle
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
- A63B22/0076—Rowing machines for conditioning the cardio-vascular system
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
- A63B24/0062—Monitoring athletic performances, e.g. for determining the work of a user on an exercise apparatus, the completed jogging or cycling distance
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
- A63B24/0087—Electric or electronic controls for exercising apparatus of groups A63B21/00 - A63B23/00, e.g. controlling load
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
Abstract
The invention discloses a method for identifying paddle frequency on a rowing machine, which relates to the technical field of indoor motion training and comprises the following steps: s1, acquiring the angular speed omega of a flywheel on a rowing machine through a speed measuring sensor on the rowing machine; s2, drawing an angular velocity-time change curve chart according to the relationship between the angular velocity omega and the time change; s3, acquiring the time difference of two continuous wave troughs in the graph as cycle time T according to the angular velocity-time change curve graph; and S4, calculating the paddle frequency based on a paddle frequency formula, and finishing the identification of the paddle frequency. This method of discerning oar frequently on rowing machine utilizes the built-in speed sensor of rowing machine to solve the problem that can't discern the oar frequently data, promotes user's experience greatly and feels, need not to install extra sensor device, and the cost is nearly zero, can discern the oar frequently on the existing rowing machine that tests the speed the function, prevents that the user training process can't know the oar frequently too high and lead to the flywheel idle running, is favorable to the user to carry out scientific effective training.
Description
Technical Field
The invention relates to the technical field of indoor exercise training, in particular to a method for identifying paddle frequency on a rowing machine.
Background
Rowing machines are machines used for training purposes to simulate the movement of water racing boats. The rowing machine can exercise 85% of muscles of the whole body such as legs, waist, upper limbs, chest, back and the like, and can achieve the effect of aerobic training of muscles of the whole body. The rowing machine has good exercise effect, small impact on knee joints and small risk of sports injury. For the using principle of the rowing machine, a handle is pulled generally, the handle drives a flywheel connected with a roller chain to rotate, the rotating flywheel starts a damping system of the rowing machine to work, and the damping system provides resistance to restrain the rotation of the flywheel.
How to carry out scientific and effective training is a problem which is more concerned by users. As is well known, the digital physical training is a training mode which applies modern technology methods to monitor the training quality through real-time measured data during the process of physical training of athletes and adjusts the physical training process according to the data. The digital physical training is a bidirectional regulation process, and has very important significance for improving the training efficiency in unit time, promoting the training motivation of athletes and realizing the accurate personalized physical training of elite athletes. And the paddle frequency data and the 500-meter speed matching data are important data for scientific and effective training of the rowing machine. The paddle frequency data monitoring function is not provided in the common rowing machine, a user wants the paddle frequency function, and a separate paddle frequency sensor needs to be installed at the handle, so that the appearance is affected and the cost is increased, and therefore, the paddle frequency data monitoring function is not the best solution.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention provides a method for identifying the paddle frequency on a rowing machine to solve the problems set forth in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a method for identifying the paddle frequency on a rowing machine is based on a speed measuring sensor arranged in the rowing machine to identify the paddle frequency, and comprises the following steps:
s1, acquiring the angular speed omega of a flywheel on a rowing machine through a speed measuring sensor on the rowing machine;
s2, drawing an angular velocity-time change curve chart according to the relationship between the angular velocity omega and the time change;
s3, acquiring the time difference of two continuous wave troughs in the graph as cycle time T according to the angular velocity-time change curve graph;
and S4, calculating the paddle frequency based on a paddle frequency formula, and finishing the identification of the paddle frequency.
Further optimizing the technical scheme, the rowing machine comprises a training part and a speed measuring part, the training part of the rowing machine is formed by installing and connecting five structures of a sliding seat, a handle, a flywheel, a sliding rail and a pedal frame, and the speed measuring part of the rowing machine is formed by signal connection of a speed measuring sensor and a microcontroller.
Further optimizing the technical scheme, in the step S1, obtaining the angular velocity ω of the rowing machine includes the following specific steps: the time t of each circle of the flywheel of the rowing machine is identified through a speed measuring sensor and a microcontroller, and the time t is calculated according to an angular velocity formula omega =2 pi/t.
In S2, the microcontroller records the angular velocity ω and the time t, and the table tool is used to convert the data into a table, so as to form an angular velocity-time variation graph.
Further optimize this technical scheme, in S3, the time difference between two successive troughs is a period time T of effective training, and an effective training includes once pulling the oar and once receiving the oar, specifically includes the following four processes:
1) A gripping process: sitting on the sliding seat of the sliding rail, straightening the two arms, holding the handles by the two hands, enabling the shanks to be as vertical as possible, and stepping on the pedal frame by the two feet;
2) And (3) a driving process: two legs are pedaled backwards, and the two hands move along a straight line to be far away from the flywheel;
3) The completion process comprises the following steps: the legs are stretched, the flywheel is pulled by the two hands to be close to the abdomen, and the upper half of the body is slightly bent backwards;
4) And (3) recovery process: the arms are extended forwards, the legs are folded, and the knees are bent to prepare for the next grasping.
Further optimizing the technical scheme, in S3, the period time T = T2-T1, where T2 is the oar collecting time of the effective training, and T1 is the oar collecting time of the last effective training.
Further optimizing the technical scheme, in the S4, the paddle frequency formula is paddle frequency =60S/T.
Compared with the prior art, the invention provides a method for identifying the paddle frequency on the rowing machine, which has the following beneficial effects:
this method of discerning oar frequently on rowing machine utilizes the built-in speed sensor of rowing machine to solve the problem that unable discernment oar was frequently data, promotes user's experience greatly and feels, need not to install additional sensor device, and the cost is almost zero, can discern the oar frequently on the existing rowing machine who tests the speed the function, prevents that the user training process can't know the oar frequently too high and lead to the flywheel idle running, is favorable to the user to carry out scientific effective training.
Drawings
FIG. 1 is a schematic view of the product structure of a rowing machine to which the present invention is applied;
FIG. 2 is a schematic view of a rowing machine grasping process;
FIG. 3 is a schematic view of the end of the rowing machine completing process;
FIG. 4 is a graph of the change in angular velocity ω -of one effective training of the rowing machine;
FIG. 5 is a graph of the continuous training angular velocity ω -time variation of the rowing machine at the target paddle frequency 22;
fig. 6 is a flow chart of a method for identifying the paddle frequency on the rowing machine according to the present invention.
In the figure: 1. a slide base; 2. a handle; 3. a flywheel; 4. a slide rail; 5. a pedal frame.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The first embodiment is as follows:
referring to fig. 1 and 6, a method for identifying a paddle frequency on a rowing machine, which identifies the paddle frequency based on a speed measurement sensor built in the rowing machine, includes the following steps:
s1, acquiring the angular speed omega of a flywheel 3 on a rowing machine through a speed measuring sensor on the rowing machine;
s2, drawing an angular velocity-time change curve chart according to the relationship between the angular velocity omega and the time change;
s3, acquiring the time difference of two continuous wave troughs in the graph as cycle time T according to the angular velocity-time change curve graph;
and S4, calculating the paddle frequency based on a paddle frequency formula, and finishing the identification of the paddle frequency.
This method of discerning oar frequently on rowing machine utilizes the built-in speed sensor of rowing machine to solve the problem that can't discern the oar frequently data, promotes user's experience greatly and feels, need not to install extra sensor device, and the cost is nearly zero, can discern the oar frequently on the existing rowing machine that tests the speed the function, prevents that the user training process can't know the oar frequently too high and lead to the flywheel idle running, is favorable to the user to carry out scientific effective training.
Specifically, the rowing machine comprises a training part and a speed measuring part, wherein the training part of the rowing machine is formed by installing and connecting five structures of a sliding seat 1, a handle 2, a flywheel 3, a sliding rail 4 and a pedal frame 5, and the speed measuring part of the rowing machine is formed by signal connection of a speed measuring sensor and a microcontroller.
Specifically, in S1, the obtaining of the rowing machine angular velocity ω includes the following specific steps: the time t of each circle of the flywheel 3 of the rowing machine is identified through a speed measuring sensor and a microcontroller, and the time t is calculated according to an angular velocity formula omega =2 pi/t.
Specifically, in S2, the angular velocity ω and the time t are recorded by the microcontroller, and the data is converted into a graph by using a table tool, so as to form an angular velocity-time variation graph.
Specifically, in S3, the time difference between two consecutive troughs is a period time T of effective training, and one effective training includes once pulling and once retracting the paddle, specifically including the following four processes:
1) A gripping process: sitting on the sliding seat 1 of the sliding rail 4, straightening the two arms, holding the handle 2 with the two hands, enabling the shank to be as vertical as possible, and stepping on the pedal frame 5 with the two feet;
2) And (3) a driving process: two legs are pedaled backwards, and the two hands move along a straight line to be far away from the flywheel 3;
3) The completion process comprises the following steps: the legs are stretched, the flywheel 3 is pulled by the two hands to be close to the abdomen, and the upper half of the body is slightly tilted backwards;
4) And (3) recovery process: the arms are extended forwards, the legs are folded, and the knees are bent to prepare for the next grasping.
Specifically, in S3, the period time T = T2-T1, where T2 is the oar collecting time of the effective training, and T1 is the oar collecting time of the last effective training.
Specifically, in S4, the paddle frequency formula is paddle frequency =60S/T.
Example two:
based on the method for identifying the paddle frequency on the rowing machine in the first embodiment, the gripping process is the preparation behavior for an effective training before the driving process is started and after the recovery process is completed, as shown in fig. 2; the completion of the process is the beginning of the recovery process, as shown in fig. 3, and fig. 4 is a graph of the change of the angular velocity β -one effective training of the rowing machine, from which a single effective training can form a single peak and a single trough, the peak corresponding to the completion of the process of fig. 3 and the trough corresponding to the completion of the grasping process of fig. 2. Fig. 5 is a graph of the angular velocity β versus time for successive training with a target paddle frequency 22, from which it follows that the paddle frequency remains constant, with the time difference produced for each successive two troughs being one effective paddle cycle time T.
In practice, the rowing machine is a machine for simulating the movement of the water rowing boat, and then the slide rail 4, the slide seat 1 and the pedal frame 5 of the water rowing boat are all reserved on the rowing machine, so that the behavior of the water rowing boat movement is highly restored. The process of fig. 2 to 3 is called as paddle pulling, and the user exerts pulling force on the handle 2 to rotate the flywheel 3, and the angular velocity ω of the flywheel 3 is continuously increased. The process from fig. 3 to fig. 2 is called feathering, and the flywheel 3 is only subjected to resistance force due to no force applied by the user, and the angular velocity ω of the flywheel 3 is continuously reduced. One time of pulling and retracting the paddles is one time of effective training, and the occupied time is the period T, which can be seen in figure 4. When the user repeats the pulling and the retracting of the paddle at the target paddle frequency 22, as shown in fig. 5, the pulling start time and the retracting end time are the same time, and the period is two times of trough: t = T2-T1, again given by the paddle frequency equation: paddle frequency =60s/T, resulting in: paddle frequency =60 s/(t 2-t 1); (in particular: the directly calculated angular velocity is subject to sensor errors and mechanical bearings and there is a spike wave, the angular velocities of fig. 4 and 5 are arithmetically averaged results; the abscissa time unit of fig. 4 and 5 is 20ms, i.e., 1 scale is 20 ms).
As shown in fig. 5, the graph of the angular velocity ω -time variation when the user trains at the target paddle frequency 22, where the abscissa is time in 20ms and the ordinate is the angular velocity ω in 1/s, shows that the average cycle time is 134 time scale values, and the actual calculated value is according to the formula that the cycle time is 134 × 20ms = 2680ms: paddle frequency =60s/2680ms =22.388; the error is 0.6%, and basically no error exists, so that the method is effective.
The invention has the beneficial effects that:
this method of discerning oar frequently on rowing machine utilizes the built-in speed sensor of rowing machine to solve the problem that can't discern the oar frequently data, promotes user's experience greatly and feels, need not to install extra sensor device, and the cost is nearly zero, can discern the oar frequently on the existing rowing machine that tests the speed the function, prevents that the user training process can't know the oar frequently too high and lead to the flywheel idle running, is favorable to the user to carry out scientific effective training.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A method for identifying paddle frequency on a rowing machine is characterized in that the paddle frequency is identified based on a speed measuring sensor arranged in the rowing machine, and the method comprises the following steps:
s1, acquiring the angular speed omega of a flywheel on a rowing machine through a speed measuring sensor on the rowing machine;
s2, drawing an angular velocity-time change curve chart according to the relationship between the angular velocity omega and the time change;
s3, acquiring the time difference of two continuous wave troughs in the graph as cycle time T according to the angular velocity-time change curve graph;
and S4, calculating the paddle frequency based on a paddle frequency formula, and finishing the identification of the paddle frequency.
2. The method for identifying the paddle frequency of the rowing machine in claim 1, wherein the rowing machine comprises a training part and a speed measuring part, the training part of the rowing machine is formed by installing and connecting five structures of a sliding seat, a handle, a flywheel, a sliding rail and a pedal frame, and the speed measuring part of the rowing machine is formed by signal connection of a speed measuring sensor and a microcontroller.
3. The method for identifying the paddle frequency of the rowing machine according to claim 1, wherein in the step S1, the step of acquiring the angular velocity ω of the rowing machine comprises the following specific steps: the time t of each circle of the flywheel of the rowing machine is identified through a speed measuring sensor and a microcontroller, and the time t is calculated according to an angular velocity formula omega =2 pi/t.
4. The method for identifying the paddle frequency of the rowing machine as recited in claim 1, wherein in the step S2, the angular velocity ω and the time t are recorded by the microcontroller, and the data are converted into a graph by using a table tool, so that an angular velocity-time change graph is formed.
5. The method according to claim 1, wherein in S3, the time difference between two successive wave troughs is a period time T of an effective training, and an effective training includes one oar pulling and one oar rolling, which includes the following four steps:
1) A gripping process: sitting on the sliding seat of the sliding rail, straightening the two arms, holding the handles by the two hands, enabling the shanks to be as vertical as possible, and stepping on the pedal frame by the two feet;
2) And (3) a driving process: two legs are pedaled backwards, and the two hands move along a straight line to be far away from the flywheel;
3) And (3) completing the process: the legs are stretched, the flywheel is pulled by the two hands to be close to the abdomen, and the upper half of the body is slightly bent backwards;
4) And (3) recovery process: the arms are extended forwards, the legs are folded, and the knees are bent to prepare for the next grasping.
6. The method for identifying the paddle frequency of the rowing machine as recited in claim 1, wherein in the S3, the period time T = T2-T1, wherein T2 is the feathering time of the active training and T1 is the feathering time of the last active training.
7. The method for identifying the paddle frequency on the rowing machine according to claim 1, wherein in the S4, the paddle frequency formula is paddle frequency =60S/T.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210939521.8A CN115212517A (en) | 2022-08-05 | 2022-08-05 | Method for identifying paddle frequency on rowing machine |
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| CN202210939521.8A CN115212517A (en) | 2022-08-05 | 2022-08-05 | Method for identifying paddle frequency on rowing machine |
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| CN111530048A (en) * | 2019-12-31 | 2020-08-14 | 沈恒 | Novel rowing machine and application method for data acquisition thereof |
| US20200269122A1 (en) * | 2017-03-13 | 2020-08-27 | Holodia Ag | Method for generating multimedia data associated with a system for practicing sports |
| US10828531B1 (en) * | 2019-05-30 | 2020-11-10 | Hydrow, Inc. | Rowing exercise machines having a configurable rowing feel |
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2022
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| WO2007051535A1 (en) * | 2005-11-03 | 2007-05-10 | Alexander Poddey | Method for operating a training device |
| CN201249013Y (en) * | 2008-04-07 | 2009-06-03 | 王培勇 | Trainer for rowing |
| WO2013006145A1 (en) * | 2011-07-04 | 2013-01-10 | Univerza V Ljubljani | System for training rowing technique |
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