An electric power output control method, device and electric power output control system for an electrically assisted bicycle

Abstract

The application discloses an electric power output control method and device of an electric power-assisted bicycle. The electric power output control method of the electric power-assisted bicycle comprises the following steps: acquiring road slope information; acquiring a user exercise target value and user basic information; acquiring a real-time riding speed; and acquiring an electric power output value of the electric power-assisted bicycle in a power-assisted state according to the user exercise target value, the user basic information, the road slope information and the real-time riding speed. The user exercise target value is guaranteed to be completed, the electric power output value is correspondingly adjusted, and the riding experience of the user is improved.

Description

Technical Field

[0001] This invention relates to the field of electric-assisted bicycle technology, and in particular to an electric-assisted bicycle and its electric power output control method and device. Background Technology

[0002] The concept of green travel is now widely promoted, and due to the high rate of sub-health among many people in today's society caused by work, there is a need for short-distance travel tools to help people get some exercise during their daily commute. Therefore, the demand for electric-assist bicycles will increase significantly, as they combine commuting and exercise. Traditional electric-assist bicycles use torque sensors to collect the force applied by the rider's pedals, but torque sensors are expensive and unreliable. Furthermore, the non-constant force output during riding causes significant fluctuations in the rider's heart rate, affecting riding safety. Summary of the Invention

[0003] This invention provides an electric-assisted bicycle and its electric power output control method and device, which realizes real-time adjustment of electric power output while ensuring a constant user motion equivalent, thereby improving the user's riding experience.

[0004] According to one aspect of the present invention, a method for controlling the electric power output of an electric-assisted bicycle is provided, comprising:

[0005] Obtain road surface slope information;

[0006] Obtain the user's exercise target value and basic user information;

[0007] Get real-time riding speed;

[0008] The electric power output value of the electric-assist bicycle in the assisted state is obtained based on the user's exercise target value, the user's basic information, the road slope information, and the real-time riding speed.

[0009] Optionally, before obtaining the user's exercise target value and basic user information, the following steps are also included:

[0010] Obtain cadence output information;

[0011] Obtain the minimum vehicle starting speed;

[0012] The starting electric power output value is obtained based on the cadence output information, the minimum vehicle starting speed, the road slope information, and the user basic information, so as to drive the motor of the electric-assisted bicycle to start at the minimum vehicle starting speed.

[0013] Optionally, based on the first formula, the starting electric power output value is obtained according to the cadence output information, the minimum vehicle starting speed, the road slope information, and the user basic information. The first formula is:

[0014] ;

[0015] Where P1 is the starting electric power output value, μ is the static friction coefficient between the tire and the ground, m is the total mass of the electric-assisted bicycle and the user, g is the weight acceleration constant, a is the road slope value, v is the minimum vehicle starting speed, and η1 is the energy conversion efficiency of the converter.

[0016] Optionally, obtaining the electric assist power output value of the electric-assist bicycle in assisted riding mode based on the user's exercise target value, the user's basic information, the road slope information, and the real-time riding speed includes:

[0017] The user's power output value is obtained based on the user's exercise target value and the user's basic information;

[0018] The mechanical power value of the vehicle is obtained based on the real-time riding speed, the road slope information, and the user's basic information.

[0019] The electric power output value of the electric-assist bicycle in the assisted state is obtained based on the user's power output value and the vehicle's mechanical power value.

[0020] Optionally, based on the second formula, the user's power output value is obtained according to the user's exercise target value and the user's basic information. The second formula is:

[0021] ;

[0022] Where P2 is the user's power output value, METs is the user's exercise target value, m is the total mass of the electric-assisted bicycle and the user, C is the energy conversion factor, and B is the energy and power conversion factor.

[0023] Optionally, based on the third formula, the mechanical power value of the entire vehicle is obtained according to the real-time riding speed, the road slope information, and the user's basic information. The third formula is:

[0024] ;

[0025] Where P3 is the mechanical power of the whole vehicle, μ is the static friction coefficient between the tire and the ground, m is the total mass of the electric-assisted bicycle and the user, g is the weight acceleration constant, a is the road slope, k is the wind resistance coefficient, and v1 is the real-time riding speed.

[0026] Optionally, after obtaining the electric assist power output value of the electric-assist bicycle in the assisted state based on the user's exercise target value, the user's basic information, the road slope information, and the real-time riding speed, the method further includes:

[0027] Obtain the correlation coefficient between user heart rate;

[0028] The power adjustment value is obtained based on the user's heart rate correlation coefficient and the power output value.

[0029] Optionally, obtaining the user's heart rate correlation coefficient includes:

[0030] Obtain the user's maximum heart rate value based on the user's basic information;

[0031] A first preset heart rate value and a second preset heart rate value are obtained based on the user's maximum heart rate value, wherein the first preset heart rate value is greater than the second preset heart rate value;

[0032] A preset heart rate difference is obtained based on the first preset heart rate value and the second preset heart rate value;

[0033] Obtain the user's real-time heart rate;

[0034] The user heart rate correlation coefficient can be obtained based on the user's real-time heart rate value, the preset heart rate difference, and the first preset heart rate value, or the user heart rate correlation coefficient can be obtained based on the user's real-time heart rate value, the preset heart rate difference, and the second preset heart rate value.

[0035] According to another aspect of the present invention, an electric power output control device for an electric-assisted bicycle is provided, wherein the electric power output control device for the electric-assisted bicycle executes the electric power output control method for the electric-assisted bicycle comprising any one of the above aspects, the electric power output control device for the electric-assisted bicycle comprising:

[0036] The road surface slope information acquisition module is used to acquire road surface slope information;

[0037] The module for obtaining user exercise target values ​​and user basic information is used to obtain user exercise target values ​​and user basic information.

[0038] The real-time cycling speed acquisition module is used to acquire real-time cycling speed.

[0039] The power output value acquisition module is used to acquire the power output value of the electric-assisted bicycle in the power-assisted state based on the user's exercise target value, the user's basic information and the road slope information.

[0040] According to another aspect of the present invention, an electric-assisted bicycle is provided, the electric-assisted bicycle including a motor, a sensor unit, a communication unit and a control unit, wherein the control unit is connected to the motor, the sensor unit and the communication unit respectively;

[0041] The controller is used to execute the electric power output control method for an electric-assisted bicycle as described in any of the preceding aspects.

[0042] The technical solution of this invention provides a method for controlling the electric power output of an electric-assisted bicycle, comprising: acquiring road slope information; acquiring the user's exercise target value and basic user information; acquiring real-time riding speed; and acquiring the electric power output value of the electric-assisted bicycle in the assisted state based on the user's exercise target value, basic user information, road slope information, and real-time riding speed. This ensures that the user's exercise target value is achieved, and simultaneously adjusts the electric power output value accordingly to improve the user's riding experience.

[0043] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 A flowchart illustrating a method for controlling the electric power output of an electric-assisted bicycle, as provided in an embodiment of the present invention;

[0046] Figure 2 A flowchart illustrating another method for controlling the electric power output of an electric-assisted bicycle, provided as an embodiment of the present invention;

[0047] Figure 3 A flowchart illustrating another method for controlling the electric power output of an electric-assisted bicycle, provided as an embodiment of the present invention;

[0048] Figure 4 A flowchart illustrating another method for controlling the electric power output of an electric-assisted bicycle, provided as an embodiment of the present invention;

[0049] Figure 5 A flowchart illustrating another method for controlling the electric power output of an electric-assisted bicycle, provided as an embodiment of the present invention;

[0050] Figure 6 This is a schematic diagram of the structure of an electric power output control device for an electric-assisted bicycle provided by the present invention. Detailed Implementation

[0051] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0053] Figure 1 This is a flowchart illustrating a power output control method for an electric-assisted bicycle according to an embodiment of the present invention. This embodiment is applicable to power output control in electric-assisted bicycles. The method can be executed by a power output control device for the electric-assisted bicycle, which can be implemented in hardware and / or software and can be configured within the electric-assisted bicycle. Figure 1 As shown, the method includes:

[0054] S101, obtain road slope information.

[0055] Among them, the electric-assisted bicycle is equipped with a slope sensor, which is used to acquire roadside slope information in real time. Based on the acquired road slope information, it can determine whether the user is riding uphill, downhill, or on a flat road. It can also determine the road slope value and then adjust the electric assist power output value of the electric-assisted bicycle in real time.

[0056] S102, obtain the user's exercise target value and basic user information.

[0057] The user's target exercise level is set by the user based on actual design needs. This allows for subsequent adjustments to the electric assist power output of the electric bicycle to ensure the target exercise level is achieved and the user's exercise needs are met. Basic user information can include the user's age and weight, facilitating precise adjustments to the electric assist power output and improving adjustment accuracy.

[0058] S103, get real-time riding speed.

[0059] The electric-assisted bicycle is equipped with a speed sensor, which is used to obtain the real-time riding speed, so that the power output value of the electric-assisted bicycle can be adjusted accordingly based on the real-time riding speed.

[0060] S104 obtains the power output value of the electric-assisted bicycle in the assisted state based on the user's exercise target value, user basic information, road slope information and real-time riding speed.

[0061] Specifically, by combining the user's exercise target, basic user information, road slope information, and real-time riding speed, the system ensures that the user's exercise target is achieved. Typically, when the road slope is uphill or flat, the system adjusts the electric assist power output of the e-bike in real-time according to different riding speeds and road slopes to ensure a constant output power, achieving the user's set exercise target and improving the riding experience. When the road slope is downhill, the electric assist is turned off, and the electric assist power output of the e-bike is zero, allowing the vehicle to continue running using inertia and avoiding energy waste.

[0062] The acquisition, storage, use, and processing of data in the technical solution of this application all comply with the relevant provisions of national laws and regulations.

[0063] In this embodiment of the invention, road slope information, user exercise target value, and user basic information are obtained; real-time riding speed is obtained; and the electric assist power output value of the electric-assist bicycle in assisted riding mode is obtained based on the user exercise target value, user basic information, road slope information, and real-time riding speed. This ensures that the user's exercise target value is achieved, and the electric assist power output value is adjusted accordingly to improve the user's riding experience.

[0064] Optional, Figure 2 A flowchart of another electric power output control method for an electric-assisted bicycle provided in an embodiment of the present invention is shown below. Figure 2 As shown, the method includes:

[0065] S201, obtain road slope information.

[0066] S202, obtain cadence output information.

[0067] The electric-assisted bicycle is equipped with a cadence Hall sensor, which acquires cadence output information. For example, a cadence Hall sensor with 20 pole pairs is used. When the user pedals 1 / 4 revolution, the cadence Hall sensor outputs 5 pulse signals. These pulse signals represent the cadence output information. The control unit acquires this cadence output information from the sensor, and the cadence acts as an electrical output switch, causing the control unit to output the corresponding starting power value.

[0068] S203, obtain the minimum vehicle starting speed.

[0069] The minimum vehicle starting speed is the minimum speed at which the electric-assisted bicycle can start. This minimum starting speed can be set according to actual design requirements and stored in the control unit; this embodiment of the invention does not impose specific limitations. For example, the minimum starting speed can be 5 km / h, or 1.4 m / s, ensuring a smooth start for the electric-assisted bicycle and avoiding sudden starts that could negatively impact the user's riding experience.

[0070] S204 obtains the starting electric power output value based on cadence output information, minimum vehicle starting speed, road slope information, and user basic information, so as to drive the motor of the electric-assisted bicycle to start at a preset speed.

[0071] When the user performs cadence operation and the starting conditions are met, the control unit outputs the starting electric power output value according to the cadence output information, minimum vehicle starting speed, road slope information, and user basic information, so that the electric-assisted bicycle motor starts at the minimum vehicle starting speed. After starting, the user rides normally, and the motor's electric power output value will be adjusted in real time to ensure that the user's exercise volume meets the user's exercise target value during the ride.

[0072] Optionally, based on the first formula, the starting electric power output value is obtained according to the cadence output information, minimum vehicle starting speed, road slope information, and user basic information. The first formula is:

[0073] Where P1 is the starting electric power output value, μ is the static friction coefficient between the tire and the ground, m is the total mass of the electric-assisted bicycle and the user, g is the weight acceleration constant, a is the road slope value, v is the minimum vehicle starting speed, and η1 is the energy conversion efficiency of the converter. For example, the static friction coefficient μ between the tire and the ground can be 0.18, the energy conversion efficiency η1 of the converter can be 0.8, the weight of the electric-assisted bicycle can be set in the control unit during the production process, and the user's weight can be flexibly adjusted according to their own settings in the control unit before riding.

[0074] S205, obtain the user's exercise target value and basic user information.

[0075] S206, get real-time riding speed.

[0076] S207 obtains the power output value of the electric-assist bicycle in the assisted state based on the user's exercise target value, user basic information, road slope information and real-time riding speed.

[0077] In this embodiment of the invention, road surface slope information, cadence output information, and minimum vehicle starting speed are acquired. Based on the cadence output information, minimum vehicle starting speed, road surface slope information, and user basic information, a starting electric power output value is obtained to drive the electric-assisted bicycle motor to start at a preset speed. The invention also acquires the user's exercise target value and user basic information; obtains the real-time riding speed; and, based on the user's exercise target value, user basic information, road surface slope information, and real-time riding speed, obtains the electric power output value of the electric-assisted bicycle in assisted riding mode. This ensures that the user's exercise target value is achieved, and simultaneously adjusts the electric power output value accordingly to improve the user's riding experience.

[0078] Optional, Figure 3 A flowchart of another electric power output control method for an electric-assisted bicycle provided in an embodiment of the present invention is shown below. Figure 3 As shown, the method includes:

[0079] S301, obtain road slope information.

[0080] S302, obtain cadence output information.

[0081] S303, obtain the minimum vehicle starting speed.

[0082] S304: Obtain the starting electric power output value based on the cadence output information, minimum vehicle starting speed, road slope information, and the user basic information, so as to drive the motor of the electric-assisted bicycle to start at the minimum vehicle starting speed.

[0083] S305 obtains the user's exercise target value and basic user information.

[0084] S306, get real-time riding speed.

[0085] S307 obtains the user's power output value based on the user's exercise target value and basic user information.

[0086] Since the user sets a target value for their exercise volume, the control unit can obtain the user's power output value required during the user's ride based on the user's target value and basic user information, thereby ensuring that the user's exercise volume reaches the target value and the exercise goal is achieved.

[0087] Optionally, based on the second formula, the user's power output value is obtained according to the user's exercise target value and basic user information. The second formula is: Where P2 is the user's power output value, METs is the user's target exercise volume, m is the total mass of the electric-assisted bicycle and the user, C is the energy conversion factor, and B is the energy-to-power conversion factor. For example, the energy-to-power conversion factor B can be based on the formula... Where η2 is the average efficiency of human movement, which is usually 0.24; and η3 is the working efficiency of the motor, which is usually 0.8.

[0088] The S308 obtains the vehicle's mechanical power value based on real-time riding speed, road slope information, and user basic information.

[0089] The total mechanical power of an electric-assisted bicycle is generated during the user's riding process. This total mechanical power includes the user's output power and the motor's assist output power.

[0090] Optionally, based on the third formula, the mechanical power value of the entire vehicle is obtained according to real-time riding speed, road gradient information, and user basic information. The third formula is: Where P3 is the mechanical power of the whole vehicle, μ is the static friction coefficient between the tire and the ground, m is the total mass of the electric-assisted bicycle and the user, g is the weight acceleration constant, a is the road slope value, k is the wind resistance coefficient, and v1 is the real-time riding speed.

[0091] S309 obtains the electric power output value of the electric-assist bicycle in the assisted state based on the user's power output value and the mechanical power value of the whole vehicle.

[0092] The electric assist power output value of an electric-assisted bicycle can be calculated by the difference between the mechanical power value of the whole vehicle and the power output value of the user. This allows the electric assist power output value of the electric-assisted bicycle to be adjusted according to different riding speeds and slopes, ensuring that the user's exercise target value is achieved and guaranteeing the user's riding experience.

[0093] In this embodiment of the invention, the following steps are taken: Road surface slope information; cadence output information; minimum vehicle starting speed; starting electric power output value based on cadence output information, minimum vehicle starting speed, road surface slope information, and user basic information to drive the electric-assisted bicycle motor to start at a preset speed; user exercise target value and user basic information; real-time riding speed; user power output value based on user exercise target value and user basic information; overall vehicle mechanical power value based on real-time riding speed, road surface slope information, and user basic information; and assist electric power output value of the electric-assisted bicycle in assisted mode based on user power output value and overall vehicle mechanical power value. This ensures the achievement of the user's exercise target value and simultaneously adjusts the assist electric power output value accordingly, improving the user's riding experience.

[0094] Optional, Figure 4 A flowchart of another electric power output control method for an electric-assisted bicycle provided in an embodiment of the present invention is shown below. Figure 4 As shown, the method includes:

[0095] S401, obtain road slope information.

[0096] S402, obtain cadence output information.

[0097] S403, obtain the minimum vehicle starting speed.

[0098] S404 obtains the starting electric power output value based on cadence output information, minimum vehicle starting speed, road slope information, and user basic information, so as to drive the motor of the electric-assisted bicycle to start at the minimum vehicle starting speed.

[0099] S405 obtains the user's exercise target value and basic user information.

[0100] S406, get real-time riding speed.

[0101] S407 obtains the user's power output value based on the user's exercise target value and basic user information.

[0102] The S408 obtains the vehicle's mechanical power value based on real-time riding speed, road slope information, and user basic information.

[0103] S409 obtains the electric power output value of the electric-assist bicycle in the assist state based on the user's power output value and the mechanical power value of the whole vehicle.

[0104] S410, obtain the user's heart rate correlation coefficient.

[0105] During the user's ride, it is necessary to obtain the user's heart rate in real time. If the user's heart rate is too high, the resistance power output value is appropriately increased to reduce the intensity of the user's ride, control the rise in the user's heart rate, and ensure the user's riding safety.

[0106] S411 obtains the power adjustment value based on the user's heart rate correlation coefficient and the power output value.

[0107] Specifically, an assist power adjustment value is generated based on the user's heart rate correlation coefficient and the assist power output value, so as to adjust the assist power output value according to changes in the user's heart rate and ensure the user's riding safety.

[0108] In this embodiment of the invention, after obtaining the electric assist power output value of the electric-assist bicycle in the assisted state based on the user's power output value and the vehicle's mechanical power value, a user heart rate correlation coefficient is obtained; then, an electric assist power adjustment value is obtained based on the user's heart rate correlation coefficient and the electric assist power output value. During the user's riding process, the electric assist power output value is adjusted accordingly based on the user's heart rate correlation coefficient to ensure user safety during riding.

[0109] Optional, Figure 5 A flowchart of another electric power output control method for an electric-assisted bicycle provided in an embodiment of the present invention is shown below. Figure 5 As shown, the method includes:

[0110] S501, obtain road slope information.

[0111] S502, obtain cadence output information.

[0112] S503, obtain the minimum vehicle starting speed.

[0113] S504 obtains the starting electric power output value based on cadence output information, minimum vehicle starting speed, road slope information, and user basic information, so as to drive the motor of the electric-assisted bicycle to start at the minimum vehicle starting speed.

[0114] S505 obtains the user's exercise target value and basic user information.

[0115] S506, get real-time riding speed.

[0116] S507 obtains the user's power output value based on the user's exercise target value and basic user information.

[0117] The S508 obtains the vehicle's mechanical power value based on real-time riding speed, road slope information, and user basic information.

[0118] S509 obtains the electric power output value of the electric-assist bicycle in the assisted state based on the user's power output value and the mechanical power value of the whole vehicle.

[0119] S510 obtains the user's maximum heart rate value based on the user's basic information.

[0120] Among them, the user's age information is extracted from the user's basic information, and the user's maximum heart rate is calculated based on the user's age information and the formula: User's maximum heart rate = 220 - age.

[0121] S511, obtain a first preset heart rate value and a second preset heart rate value based on the user's maximum heart rate value, wherein the first preset heart rate value is greater than the second preset heart rate value.

[0122] Among them, a preset heart rate range is obtained according to the user's maximum heart rate value. For example, the first preset heart rate value can be equal to the user's maximum heart rate value - 20, and the second preset heart rate value can be equal to the user's maximum heart rate value - 50.

[0123] S512, obtain the preset heart rate difference based on the first preset heart rate value and the second preset heart rate value.

[0124] The preset heart rate difference is calculated by subtracting the first preset heart rate value from the second preset heart rate value. For example, the preset heart rate difference can be 30.

[0125] S513, obtains the user's real-time heart rate value.

[0126] The system collects the user's heart rate data in real time through a sports watch or fitness tracker and communicates with the control unit in the electric-assisted electric vehicle via wireless transmission. The wireless transmission can be Bluetooth or 4G, and the data is displayed on the dashboard of the electric-assisted electric vehicle.

[0127] S514, obtain the user heart rate correlation coefficient based on the user's real-time heart rate value, the preset heart rate difference and the first preset heart rate value, or obtain the user heart rate correlation coefficient based on the user's real-time heart rate value, the preset heart rate difference and the second preset heart rate value.

[0128] Specifically, when the user's real-time heart rate reaches the first preset heart rate value, a user heart rate correlation coefficient is obtained based on the user's real-time heart rate value, the preset heart rate difference, and the first preset heart rate value. Since the first preset heart rate value is at its maximum, the user's power output needs to be minimized, ensuring the electric assist power output is the sole output to effectively guarantee the user's riding safety. When the user's real-time heart rate reaches the second preset heart rate value, the user heart rate correlation coefficient is obtained based on the user's real-time heart rate value, the preset heart rate difference, and the second preset heart rate value. Since the second preset heart rate value is at a relatively high heart rate, the electric assist power output needs to be increased to appropriately reduce the user's power output, decrease the intensity of the user's cycling exercise, actively control the user's heart rate from rising too quickly, and ensure the user's riding safety.

[0129] Optionally, the user's heart rate correlation coefficient can be obtained based on the fourth formula, which is: A=(Δbpm / d) 2 +1; where A is the user heart rate correlation coefficient, Δbpm is the difference between the user's real-time heart rate value and the first preset heart rate value or the difference between the user's real-time heart rate value and the second preset heart rate value, and d is the preset heart rate difference.

[0130] S515 obtains the power adjustment value based on the user's heart rate correlation coefficient and the power output value.

[0131] This invention provides an embodiment that obtains a user's maximum heart rate based on basic user information; obtains a first preset heart rate value and a second preset heart rate value based on the user's maximum heart rate value, wherein the first preset heart rate value is greater than the second preset heart rate value; obtains a preset heart rate difference based on the first preset heart rate value and the second preset heart rate value; obtains the user's real-time heart rate value; obtains a user heart rate correlation coefficient based on the user's real-time heart rate value, the preset heart rate difference, and the first preset heart rate value, or obtains a user heart rate correlation coefficient based on the user's real-time heart rate value, the preset heart rate difference, and the second preset heart rate value; and obtains an assist power adjustment value based on the user heart rate correlation coefficient and the assist power output value. This achieves the goal of adjusting the assist power output value according to the user heart rate correlation coefficient to obtain the assist power adjustment value, ensuring the user's riding safety and riding experience during the riding process.

[0132] Based on the same inventive concept, embodiments of the present invention also provide an electric power output control device for an electric-assisted bicycle. Figure 6 This is a schematic diagram of the structure of an electric power output control device for an electric-assisted bicycle provided by the present invention, as shown below. Figure 6 As shown, the electric power output control method of the electric-assisted bicycle, comprising any one of the above aspects, is executed by the electric power output control device of the electric-assisted bicycle. The electric power output control device of the electric-assisted bicycle can be implemented by software and / or hardware, and includes:

[0133] The road slope information acquisition module 201 is used to acquire road slope information;

[0134] The user exercise target value and user basic information acquisition module 202 is used to acquire the user exercise target value and user basic information;

[0135] The real-time cycling speed acquisition module 203 is used to acquire real-time cycling speed;

[0136] The electric power output value acquisition module 204 is used to acquire the electric power output value of the electric bicycle in the assistance state based on the user's exercise target value, user basic information and road slope information.

[0137] The electric power output control device for electric-assisted bicycles provided in this embodiment of the invention includes the technical features of the electric power output control method for electric-assisted bicycles provided in any embodiment of the invention, and can achieve the beneficial effects of the electric power output control method for electric-assisted bicycles provided in any embodiment of the invention. The similarities can be referred to the above description of the electric power output control method for electric-assisted bicycles provided in this embodiment of the invention, and will not be repeated here.

[0138] Based on the same inventive concept, this invention also provides an electric-assisted bicycle, which includes a motor, a sensor unit, a communication unit, and a control unit. The control unit is connected to the motor, the sensor unit, and the communication unit respectively. The controller is used to execute the electric power output control method of the electric-assisted bicycle provided in any embodiment of this invention. Therefore, the electric-assisted bicycle provided in this invention includes the technical features of the electric power output control method of the electric-assisted bicycle provided in any embodiment of this invention, and can achieve the beneficial effects of the electric power output control method of the electric-assisted bicycle provided in any embodiment of this invention. The similarities can be referred to the above description of the electric power output control method of the electric-assisted bicycle provided in this invention, and will not be repeated here.

[0139] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for controlling the electric power output of an electric-assisted bicycle, characterized in that, include: Obtain road surface slope information; Obtain the user's exercise target value and basic user information; Get real-time riding speed; The electric assist power output value of the electric assist bicycle in the assist state is obtained based on the user's exercise target value, the user's basic information, the road slope information, and the real-time riding speed. Also includes: Obtain cadence output information; Obtain the minimum vehicle starting speed; The starting electric power output value is obtained based on the cadence output information, the minimum vehicle starting speed, the road slope information, and the user basic information, so as to drive the motor of the electric-assisted bicycle to start at the minimum vehicle starting speed. After obtaining the power output value of the electric-assist bicycle in assisted mode based on the user's exercise target value, the user's basic information, the road slope information, and the real-time riding speed, the method further includes: Obtain the correlation coefficient between user heart rate; The assist power adjustment value is obtained based on the user's heart rate correlation coefficient and the assist power output value; Obtaining the user's heart rate correlation coefficient includes: Obtain the user's maximum heart rate value based on the user's basic information; A first preset heart rate value and a second preset heart rate value are obtained based on the user's maximum heart rate value, wherein the first preset heart rate value is greater than the second preset heart rate value; A preset heart rate difference is obtained based on the first preset heart rate value and the second preset heart rate value; Obtain the user's real-time heart rate; The user heart rate correlation coefficient can be obtained based on the user's real-time heart rate value, the preset heart rate difference, and the first preset heart rate value, or the user heart rate correlation coefficient can be obtained based on the user's real-time heart rate value, the preset heart rate difference, and the second preset heart rate value. It also includes: obtaining the user's heart rate correlation coefficient based on the fourth formula, which is: A = (Δbpm / d) 2 +1; where A is the user heart rate correlation coefficient, Δbpm is the difference between the user's real-time heart rate value and the first preset heart rate value or the difference between the user's real-time heart rate value and the second preset heart rate value, and d is the preset heart rate difference.

2. The method for controlling the electric power output of an electric-assisted bicycle according to claim 1, characterized in that, Based on the first formula, the starting electric power output value is obtained according to the cadence output information, the minimum vehicle starting speed, the road slope information, and the user basic information. The first formula is: P1=(μmg*cosa+mg*sina)*v / η1; Where P1 is the starting electric power output value, μ is the static friction coefficient between the tire and the ground, m is the total mass of the electric-assisted bicycle and the user, g is the weight acceleration constant, a is the road slope value, v is the minimum vehicle starting speed, and η1 is the energy conversion efficiency of the converter.

3. The method for controlling the electric power output of an electric-assisted bicycle according to claim 1, characterized in that, The electric assist output value of the electric-assist bicycle in assisted riding mode is obtained based on the user's exercise target value, the user's basic information, the road slope information, and the real-time riding speed, including: The user's power output value is obtained based on the user's exercise target value and the user's basic information; The mechanical power value of the vehicle is obtained based on the real-time riding speed, the road slope information, and the user's basic information. The electric power output value of the electric-assist bicycle in the assisted state is obtained based on the user's power output value and the vehicle's mechanical power value.

4. The method for controlling the electric power output of an electric-assisted bicycle according to claim 3, characterized in that, Based on the second formula, the user's power output value is obtained according to the user's exercise target value and the user's basic information. The second formula is: P2 = m * METs * C * B; Where P2 is the user's power output value, METs is the user's exercise target value, m is the total mass of the electric-assisted bicycle and the user, C is the energy conversion factor, and B is the energy and power conversion factor.

5. The method for controlling the electric power output of an electric-assisted bicycle according to claim 3, characterized in that, Based on the third formula, the vehicle's mechanical power value is obtained according to the real-time riding speed, the road slope information, and the user's basic information. The third formula is: P3=(μmg*cos+mg*sin+kv1 2 )*v1; Where P3 is the mechanical power of the whole vehicle, μ is the static friction coefficient between the tire and the ground, m is the total mass of the electric-assisted bicycle and the user, g is the weight acceleration constant, a is the road slope, k is the wind resistance coefficient, and v1 is the real-time riding speed.

6. A power output control device for an electric-assisted bicycle, characterized in that, The electric power output control device of the electric-assisted bicycle executes the electric power output control method of any one of claims 1-5, wherein the electric power output control device of the electric-assisted bicycle comprises: The road surface slope information acquisition module is used to acquire road surface slope information; The module for obtaining user exercise target values ​​and user basic information is used to obtain user exercise target values ​​and user basic information. The real-time cycling speed acquisition module is used to acquire real-time cycling speed. The power output value acquisition module is used to acquire the power output value of the electric-assisted bicycle in the power-assisted state based on the user's exercise target value, the user's basic information and the road slope information.

7. An electric-assisted bicycle, characterized in that, The electric-assisted bicycle includes a motor, a sensor unit, a communication unit, and a control unit, wherein the control unit is connected to the motor, the sensor unit, and the communication unit respectively. The control unit is used to execute the electric power output control method of the electric-assisted bicycle according to any one of claims 1-5.

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