A constant power regulation method, system, device and program product for a power bicycle

Abstract

The application discloses a constant power regulation method, system, device and program product of a power bicycle, and belongs to the technical field of physical health testing. The power bicycle adopts a magnetic control resistance bicycle, and the constant power regulation method comprises the following steps: acquiring a constant rotating speed setting of the power bicycle by a user; acquiring a constant power setting value required by the user; calculating a required current value according to a constant power and input current value curve of the power bicycle; inputting the current to a magnetic control component according to the calculated required current value, so as to change the magnetic force of the magnetic control component, and then control the rotating resistance of a flywheel, and finally realize the output of constant power. The application establishes a constant power output model of the magnetic control resistance bicycle, can obtain a constant power output value by accurately adjusting the input current value on the basis of constant rotating speed, provides reliable guarantee for the accuracy of various test results, overcomes the defects that the output power of the existing power bicycle is not constant, and meets the requirements of different test modes.

Description

Technical Field

[0001] This invention relates to the field of physical health testing technology, and in particular to a constant power adjustment method, system, device and program product for a power bicycle. Background Technology

[0002] In sports medicine, VO2max is the gold standard for measuring cardiac workload. VO2max (also called maximum oxygen consumption) refers to the amount of oxygen the body can take in per unit of time (usually measured in milliliters per kilogram per minute) during prolonged, strenuous exercise involving a large number of muscle groups, when the cardiopulmonary function and muscles' oxygen utilization capacity reach their individual limits. This indicator reflects the body's ability to inhale, transport, and utilize oxygen, and is a crucial indicator for assessing aerobic exercise capacity. In August 2023, with the approval of the General Administration of Sport of China, the National Physical Fitness Monitoring Center officially released the "National Physical Fitness Measurement Standards (2023 Revision)". The new version of the "National Physical Fitness Measurement Standards" officially includes the Level 2 load test on a power bicycle as a test item for the adult group (20-59 years old), and provides testing specifications and scoring standards. Therefore, testing VO2max has become a routine requirement.

[0003] Maximum oxygen uptake (VO2 max) is measured using two methods: direct and indirect. Direct methods typically involve laboratory conditions where subjects undergo a maximal load test on specialized exercise equipment (such as treadmills or stepladders) to determine their oxygen uptake. This method provides reliable, repeatable data that accurately assesses a person's aerobic capacity. However, because the exercise load is close to the human body's limits, it carries certain risks, and the equipment is relatively specialized and expensive, making it difficult to promote among the general public. Therefore, indirect methods are generally used in general fitness tests, where VO2 max is indirectly calculated based on the subject's heart rate and work output during submaximal exercise. Traditional methods include the step test, stationary bike, and treadmill. Stationary bikes are suitable for various groups, regardless of age, gender, or training level, as their energy expenditure is generally similar under a specific workload (power), making them the most suitable option.

[0004] Most existing power bikes rely on mechanical resistance, resulting in inconsistent power output, and their functionality is relatively limited, supporting only one or two testing modes. Common submaximal cardiorespiratory training includes:

[0005] The Astrand test, short for Astrand-Rhyming Submaximal Cycle Ergometer Test, is a standard protocol for assessing aerobic capacity. It is divided into single-level and multi-level exercise load tests. In the single-level exercise load test, the load is determined by gender and fitness level, with a frequency of 50 rpm. It is divided into general fitness and good fitness levels, requiring subjects of the same gender to participate in both procedures. For men with general fitness and good fitness, the loads are 100 and 150 W respectively; for women, the loads are 50 and 100 W respectively. This load is maintained continuously on the ergometer for 6 minutes, aiming to achieve a heart rate of 125–170 beats per minute. Heart rate (HR) is recorded at the 5th and 6th minutes, and VO2max is estimated based on patterns and age.

[0006] PWC170 Method: Perform two levels of load exercise, each lasting 4-6 minutes. The program is set to record the heart rate (HR) for the first level at 6 minutes. Simultaneously, the program prompts a 5-minute rest period before proceeding to the second level of load exercise, also lasting 6 minutes. Participants of the same gender are divided into two physical types: general practitioners and athletes. For general practitioners, the loads for the first and second levels are 100 and 150 W respectively; for athletes, the loads are 150 and 200 W respectively. For general practitioners, the loads for the first and second levels are 50 and 100 W respectively; for athletes, the loads are 100 and 150 W respectively.

[0007] YMCA Method: This submaximal load test involves increasing the heart rate (HR) to between 110 beats / min and 85% of HRmax through three or more consecutive 3-minute loads, maintaining two consecutive load levels. The pedaling frequency is 50 beats / min, and the initial load is 50W (female) and 100W (male). The HR in the last minute of the first level determines the load for subsequent levels. For example, if the HR is 80-89 beats / min, the corresponding load for the second level would be 100W (female) and 150W (male).

[0008] As can be seen from the above, the submaximal cardiopulmonary function training requires a constant power output from the stationary bike to obtain more accurate test results. Therefore, the accuracy of the power output from the stationary bike is very important and affects the accuracy of the overall test results.

[0009] Based on this, this application provides an embedded constant power regulation method, system, device, and program product for power bicycles, enabling them to achieve accurate constant power output without the aid of external computer software, thus providing a reliable guarantee for the accuracy of various test results. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to provide a constant power adjustment method for a power bicycle, which enables it to achieve accurate constant power output, provides a reliable guarantee for the accuracy of various test results, and thus overcomes the shortcomings of existing power bicycles with inconsistent output power.

[0011] To solve the above-mentioned technical problems, the present invention provides a constant power adjustment method for a power bicycle, wherein the power bicycle is a magnetic resistance bicycle, the magnetic resistance bicycle obtains the resistance value by changing the input current, and the constant power of the power bicycle is determined by a constant resistance value and a constant rotation speed. The constant power adjustment method includes:

[0012] Obtain the user's constant speed setting for the power bike;

[0013] Obtain the constant power setting value required by the user;

[0014] Based on the relationship curve between the constant power y of the power bicycle and the input current value x, the required current value is calculated according to the constant power setting value; wherein, the relationship curve between the constant power y of the power bicycle and the input current value x is:

[0015] R 2 =0.9956;

[0016] The required current value is input to the magnetic control component to change the magnetic force of the component, thereby controlling the resistance of the flywheel rotation and achieving constant power output.

[0017] The constant rotational speed is 60 rpm.

[0018] In a further improvement, the relationship curve between the constant power y of the power bicycle and the input current value x is formed by fitting several current input point values ​​and their corresponding measured power values.

[0019] This invention also provides a constant power regulation system for a power bicycle. The constant power regulation system includes a speed setting module, a power setting module, a current calculation module, and a current input module.

[0020] The speed setting module is used to obtain the user's constant speed setting for the power bicycle;

[0021] The power setting module is used to obtain the constant power setting value required by the user;

[0022] The current calculation module is used to calculate the required current value based on the relationship curve between the constant power y of the power bicycle and the input current value x, according to the constant power setting value; wherein, the relationship curve between the constant power y of the power bicycle and the input current value x is:

[0023] R 2 =0.9956;

[0024] The current input module is used to input current to the magnetic control component according to the required current value obtained by the current calculation module.

[0025] The present invention also provides a power bicycle. The power bicycle is a magnetic resistance bicycle, and further includes a processor and a memory;

[0026] The memory is used to store one or more program instructions;

[0027] The processor is configured to run one or more program instructions to perform the steps of the constant power regulation method for the power bicycle as described above.

[0028] The present invention also provides a computer-readable storage medium for a power bicycle, the computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the constant power regulation method for a power bicycle as described above.

[0029] The present invention also provides a computer program product for a power bicycle, the computer program product including computer program instructions that, when executed by a processor, implement the steps of the constant power regulation method for the power bicycle as described above.

[0030] With this design, the present invention has at least the following advantages:

[0031] The constant power adjustment method for power bicycles of this invention establishes a constant power output model for a magnetic resistance bicycle. This model is represented by a curve showing the relationship between constant power and input current. It enables a constant magnetic resistance value to be obtained by adjusting the input current value on the basis of constant speed, thereby obtaining a constant power output value. This allows for accurate constant power output, providing a reliable guarantee for the accuracy of various test results. It overcomes the defect of inconsistent power output in existing power bicycles and meets the needs of different test modes. Attached Figure Description

[0032] The above is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Figure 1 This is a flowchart illustrating the constant power adjustment method for the power bicycle of the present invention.

[0034] Figure 2This is a structural block diagram of the constant power regulation system for the power bicycle of the present invention. Detailed Implementation

[0035] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that a more thorough understanding of the invention will be achieved and that the full scope of the invention will be conveyed to those skilled in the art.

[0036] The electric bicycle of this invention adopts the existing magnetic resistance bicycle, and its hardware mechanical structure is all prior art; therefore, this application does not limit its structure. The improvement of this application lies in providing a constant power output model for the existing magnetic resistance bicycle. This constant power output model is represented by a curve showing the relationship between constant power and input current value, enabling a constant power output value to be obtained by adjusting the input current value while maintaining a constant rotational speed. Specific embodiments are as follows.

[0037] This embodiment of the power bicycle uses a magnetic resistance bicycle, which obtains its resistance value by changing the input current. During cycling, cycling power is the rate at which the work done by the rider applying force (generating torque) on the pedals, transmitted through the crank and chain to the rear wheel, propels the bicycle forward per unit time. That is, the power of the rider pedaling = pedaling force * rotational speed.

[0038] To achieve a constant power output, a power bicycle can first maintain a constant rotation speed. For example, according to national physical fitness standards, a speed of 60 rpm (60 revolutions per minute) can be set, with a screen display guiding the rider to maintain a consistent rhythm. Secondly, maintaining a constant pedaling force will yield constant power. Existing magnetic resistance bicycles primarily rely on a linear relationship between pedaling resistance and input current to achieve power output. However, actual research has revealed that the relationship between pedaling resistance and input current is not purely linear. This results in inconsistent power output from existing magnetic resistance bicycles, with significant deviations that ultimately affect the accuracy of various test data.

[0039] This embodiment uses an independent power meter (including a torque meter) in conjunction with a magnetic resistance bicycle to measure the relationship between different current intensities and output power in real time, thereby establishing a highly accurate constant power output model. The process of establishing this constant power output model is as follows:

[0040] First, the driving wheel speed of the magnetic resistance bicycle is set to 60 rpm. The distance S2 between the coil and the copper disk in the magnetic resistance bicycle is 2.5 mm, and the distance L1 from the center point of the coil to the center of the copper disk axis is 120 mm. Based on this, a constant current value is input to the magnetic resistance bicycle, and the power output value of the bicycle is measured in real time using a power meter (including a torque meter). The results are shown in Table 1 below.

[0041] Table 1. Correspondence between actual input current values ​​and measured power values

[0042]

[0043] Based on the results in Table 1 above, curve fitting was performed between the input current value and the measured instantaneous average power to obtain the relationship curve between constant power y and input current value x:

[0044]

[0045] The R-value of the relationship curve 2 =0.9956, indicating high fitting accuracy.

[0046] This embodiment uses the highly accurate fitting curve of constant power y versus input current x to form a constant power output model. This constant power output model is then embedded in the power bicycle's computer program, allowing it to achieve constant power output without relying on external software, based on the precisely calculated input current value.

[0047] See attached document Figure 1 As shown, the constant power regulation method described in this embodiment includes:

[0048] Obtain the user's constant speed setting for the power bike, such as 60 rpm as per the national physical fitness test standard;

[0049] Obtain the constant power setting value required by the user;

[0050] Based on the relationship curve between the constant power y of the power bicycle and the input current value x, the required current value is calculated according to the constant power setting value; wherein, the relationship curve between the constant power y of the power bicycle and the input current value x is:

[0051] R 2 =0.9956;

[0052] The required current value is input to the magnetic control component to change the magnetic force of the component, thereby controlling the resistance of the flywheel rotation and achieving constant power output.

[0053] See attached document Figure 2As shown, the constant power regulation system of the power bicycle in this embodiment includes a speed setting module, a power setting module, a current calculation module, and a current input module.

[0054] The speed setting module is used to obtain the user's constant speed setting for the power bicycle;

[0055] The power setting module is used to obtain the constant power setting value required by the user;

[0056] The current calculation module is used to calculate the required current value based on the relationship curve between the constant power y of the power bicycle and the input current value x, according to the constant power setting value; wherein, the relationship curve between the constant power y of the power bicycle and the input current value x is:

[0057] R 2 =0.9956;

[0058] The current input module is used to input current to the magnetic control component according to the required current value obtained by the current calculation module.

[0059] In addition, this embodiment also provides a power bicycle, which is a magnetic resistance bicycle. The power bicycle further includes a processor and a memory; the memory is used to store one or more program instructions; the processor is used to run one or more program instructions to perform the steps of the constant power adjustment method of the power bicycle as described above.

[0060] This invention's power bicycle, capable of outputting a constant power value, allows therapists to apply graded, measurable loads to users for various cardiopulmonary function tests and functional training. When combined with appropriate theoretical analysis models (e.g., Åstrand test, Ekblom-Bak submaximal test), changes in circulation, respiration, and metabolism in patients and athletes can be monitored during and after training. A human-machine interface is also provided via a touchscreen on the bicycle's head, allowing selection of various test modes and durations, set by an embedded computer program that automatically controls the changes in power levels and timing, meeting the requirements of different test modes and providing a constant-power training mode.

[0061] The electric bicycle of this invention also supports WiFi, enabling wireless transmission of test data.

[0062] This invention's power bicycle can also be equipped with a user-friendly wrist-based heart rate monitor (PPG photoplethysmography). The tester wears it on their arm during testing, transmitting heart rate via Bluetooth. The monitor can calculate the tester's maximum oxygen uptake (Vo2Max) in real time based on rotation speed, power, and heart rate. It can also have a built-in chip to automatically calculate indicators such as maximum oxygen uptake, metabolic equivalent, calorie consumption, maximum heart rate, and target heart rate. Furthermore, it provides a national physical fitness score based on maximum oxygen uptake, according to the "National Physical Fitness Testing Standard (2023 Edition)".

[0063] In addition, this embodiment also provides a computer-readable storage medium for a power bicycle, the computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the constant power regulation method for the power bicycle as described above.

[0064] Furthermore, this embodiment also provides a computer program product for a power bicycle, the computer program product including computer program instructions that, when executed by a processor, implement the steps of the constant power regulation method for the power bicycle as described above.

[0065] In this embodiment of the invention, the processor can be an integrated circuit chip with signal processing capabilities. The processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in this embodiment of the invention. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in this embodiment of the invention can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The processor reads information from the storage medium and, in conjunction with its hardware, completes the steps of the above methods. The storage medium can be memory, for example, volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM).The storage media described in the embodiments of this invention are intended to include, but are not limited to, these and any other suitable types of memory. Those skilled in the art will recognize that the functions described in one or more of the above examples can be implemented using a combination of hardware and software. When applied software, the corresponding functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transmission of computer programs from one place to another. Storage media can be any available medium accessible to general-purpose or special-purpose computers. Although the invention has been described in detail above with general description and specific embodiments, modifications or improvements can be made to it, which will be apparent to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the invention are within the scope of protection claimed by this invention.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, or alterations made by those skilled in the art using the disclosed technical content shall fall within the protection scope of the present invention.

Claims

1. A method for constant power adjustment of a power bicycle, wherein the power bicycle is a magnetic resistance bicycle, the magnetic resistance bicycle obtains a resistance value by changing the input current, and the constant power of the power bicycle is determined by a constant resistance value and a constant rotational speed, characterized in that, The constant power regulation method includes: Obtain the user's constant speed setting for the power bike; Obtain the constant power setting value required by the user; Based on the relationship curve between the constant power y of the power bicycle and the input current value x, the required current value is calculated according to the constant power setting value; wherein, the relationship curve between the constant power y of the power bicycle and the input current value x is: R 2 =0.9956； The required current value is input to the magnetic control component to change the magnetic force of the component, thereby controlling the resistance of the flywheel rotation and achieving constant power output.

2. The constant power adjustment method for a power bicycle according to claim 1, characterized in that, The constant speed is 60 rpm.

3. The constant power adjustment method for a power bicycle according to claim 2, characterized in that, The relationship curve between the constant power y of the power bicycle and the input current value x is formed by fitting several current input point values ​​and their corresponding measured power values.

4. A constant power regulation system for a power bicycle, wherein the power bicycle is a magnetic resistance bicycle, the magnetic resistance bicycle obtains a resistance value by changing the input current, and the constant power of the power bicycle is determined by a constant resistance value and a constant rotational speed, characterized in that, The constant power regulation system includes a speed setting module, a power setting module, a current calculation module, and a current input module. The speed setting module is used to obtain the user's constant speed setting for the power bicycle; The power setting module is used to obtain the constant power setting value required by the user; The current calculation module is used to calculate the required current value based on the relationship curve between the constant power y of the power bicycle and the input current value x, according to the constant power setting value; wherein, the relationship curve between the constant power y of the power bicycle and the input current value x is: R 2 =0.9956； The current input module is used to input current to the magnetic control component according to the required current value obtained by the current calculation module.

5. A power bicycle, said power bicycle being a magnetic resistance bicycle, characterized in that, The power bicycle also includes a processor and memory; The memory is used to store one or more program instructions; The processor is configured to run one or more program instructions to perform the steps of the constant power regulation method for a power bicycle as described in any one of claims 1-3.

6. A computer-readable storage medium for use on a power bicycle, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the constant power regulation method for a power bicycle as described in any one of claims 1-3.

7. A computer program product for use on a power bicycle, characterized in that, The computer program product includes computer program instructions that, when executed by a processor, implement the steps of the constant power regulation method for a power bicycle as described in any one of claims 1-3.

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