Electric power-assisted bicycle and electric power output control method and device thereof

Abstract

The invention discloses an electric power-assisted bicycle and an electric power output control method and device thereof. The electric power output control method of the electric power-assisted bicycle relates to the technical field of electric power-assisted bicycles, and comprises the following steps: acquiring road slope information; acquiring a user exercise amount target value and user basic information; acquiring a real-time riding speed; and according to the user exercise amount target value, the user basic information, the road slope information and the real-time riding speed, a power-assisted electric power output value of the electric power-assisted bicycle in the power-assisted state is obtained. And meanwhile, the power-assisted electric power output value is correspondingly adjusted, so that the riding experience of the user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power-assisted bicycles, and in particular to an electric power-assisted bicycle and an electric power output control method and device thereof. Background Art

[0002] At present, it has become a trend for the whole nation to advocate the concept of green travel. As most people in today's society suffer from sub-health due to work, they need a short-distance travel tool to help people get a certain amount of exercise during their daily commute. Therefore, the demand for electric power-assisted bicycles will increase significantly, which can be used for both transportation and exercise. Traditional electric power-assisted bicycles use torque sensors to collect the force used by the rider's pedals, but the cost of torque sensors is high and the reliability is not enough. In addition, the rider uses a non-constant force output method during the riding process, which causes the rider's heart rate to fluctuate greatly, affecting the safety of riding. Summary of the invention

[0003] The present invention provides an electric power-assisted bicycle and an electric power output control method and device thereof, which can realize real-time adjustment of electric power output while ensuring that the user's exercise equivalent is constant, thereby improving the user's riding experience.

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

[0005] Get road slope information;

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

[0007] Get real-time riding speed;

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

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

[0010] Get cadence output information;

[0011] Get the minimum vehicle starting speed;

[0012] A starting electric power output value is obtained according to the pedaling frequency output information, the minimum vehicle starting speed, the road slope information and the user basic information to drive the motor of the electric power-assisted bicycle to start at the minimum vehicle starting speed.

[0013] Optionally, based on a 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, and the first formula is:

[0014] ;

[0015] Among them, 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 conversion efficiency of electromechanical energy.

[0016] Optionally, obtaining the assisting electric power output value of the electric assisting bicycle in the assisting state according to the user's exercise amount target value, the user's basic information, the road slope information and the real-time riding speed includes:

[0017] Acquire a user power output value according to the user exercise target value and the user basic information;

[0018] Acquire the mechanical power value of the whole vehicle according to the real-time riding speed, the road slope information and the basic information of the user;

[0019] The assist electric power output value of the electric assist bicycle in the assist state is obtained according to the user power output value and the whole vehicle mechanical power value.

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

[0021] ;

[0022] Among them, 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 coefficient, and B is the energy and power conversion coefficient.

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

[0024] ;

[0025] Among them, P3 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, k is the drag coefficient, and v1 is the real-time riding speed.

[0026] Optionally, after obtaining the assisting electric power output value of the electric assisting bicycle in the assisting state according to the user exercise amount target value, the user basic information, the road slope information and the real-time riding speed, the method further includes:

[0027] Get the user's heart rate correlation coefficient;

[0028] The assisting electric power adjustment value is obtained according to the user heart rate correlation coefficient and the assisting electric power output value.

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

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

[0031] Acquire a first preset heart rate value and a second preset heart rate value according to the maximum heart rate value of the user, wherein the first preset heart rate value is greater than the second preset heart rate value;

[0032] Acquire a preset heart rate difference according to the first preset heart rate value and the second preset heart rate value;

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

[0034] The user's heart rate correlation coefficient is obtained according to the user's real-time heart rate value, the preset heart rate difference and the first preset heart rate value, or the user's heart rate correlation coefficient is obtained according to 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, there is provided an electric power output control device for an electric power-assisted bicycle, which is used to execute the electric power output control method for an electric power-assisted bicycle according to any one of the above aspects, and the electric power output control device for an electric power-assisted bicycle comprises:

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

[0037] A user exercise target value and user basic information acquisition module, used to acquire the user exercise target value and user basic information;

[0038] A real-time riding speed acquisition module is used to obtain the real-time riding speed;

[0039] The assisting electric power output value acquisition module is used to acquire the assisting electric power output value of the electric assisting bicycle in the assisting state according to 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, there is provided an electric power-assisted bicycle, the electric power-assisted bicycle comprising a motor, a sensor unit, a communication unit and a control unit, the control unit being 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 of the electric power-assisted bicycle described in any one of the above aspects.

[0042] The technical solution of the embodiment of the present invention provides an electric power output control method for an electric power-assisted bicycle, including: obtaining road slope information; obtaining a user's exercise target value and user basic information; obtaining a real-time riding speed; and obtaining the power-assisted electric power output value of the electric power-assisted bicycle in the power-assisted state according to the user's exercise target value, user basic information, road slope information, and real-time riding speed. Ensure that the user's exercise target value is achieved, and adjust the power-assisted electric power output value accordingly to improve the user's riding experience.

[0043] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 A flow chart of an electric power output control method for an electric power-assisted bicycle provided by an embodiment of the present invention;

[0046] Figure 2 A flow chart of another electric power output control method for an electric power-assisted bicycle provided by an embodiment of the present invention;

[0047] Figure 3 A flow chart of another electric power output control method for an electric power-assisted bicycle provided by an embodiment of the present invention;

[0048] Figure 4 A flow chart of another electric power output control method for an electric power-assisted bicycle provided by an embodiment of the present invention;

[0049] Figure 5 A flow chart of another electric power output control method for an electric power-assisted bicycle provided by an embodiment of the present invention;

[0050] Figure 6 A schematic structural diagram of an electric power output control device for an electric power-assisted bicycle provided by the present invention. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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 and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

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

[0054] S101, obtaining road slope information.

[0055] Among them, the electric power-assisted bicycle is equipped with a slope sensor, which is used to obtain roadside slope information in real time. According to the obtained road slope information, it is determined whether the user is in an uphill state, a downhill state or a flat road state during riding. The road slope value can also be determined, and the power-assisted electric power output value of the electric power-assisted bicycle is adjusted in real time.

[0056] S102, obtaining a user's exercise target value and basic user information.

[0057] The user's exercise target value is set by the user according to actual design requirements, which is convenient for subsequent adjustment of the power-assisted electric power output value of the electric power-assisted bicycle so that the user's exercise target value is achieved and the user's exercise needs are met. The user's basic information may include the user's age information and the user's weight information, which is convenient for subsequent precise adjustment of the power-assisted electric power output value of the electric power-assisted bicycle according to the user's basic information to improve the adjustment accuracy.

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

[0059] Among them, the electric power-assisted bicycle is provided with a speed sensor, which is used to obtain the real-time riding speed, so as to facilitate the subsequent adjustment of the power-assisted electric power output value of the electric power-assisted bicycle in accordance with the real-time riding speed.

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

[0061] Among them, the user's exercise target value, user basic information, road slope information and real-time riding speed are combined to ensure that the user's exercise target value is achieved. Usually when the road slope is uphill or flat, the power-assisted electric power output value of the electric power-assisted bicycle in the power-assisted state is adjusted in real time according to different riding speeds and road slopes to ensure that the user's output power is constant, achieve the user's set user exercise target value, and enhance the user's riding experience. When the road slope is downhill, the power-assisted state is turned off, and the power-assisted electric power output value of the electric power-assisted bicycle is zero. Inertia can be used to ensure vehicle operation and avoid energy waste.

[0062] Among them, the acquisition, storage, use and processing of data in the technical solution of this application are in compliance with the relevant provisions of national laws and regulations.

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

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

[0065] S201, obtaining road slope information.

[0066] S202, obtaining cadence output information.

[0067] Among them, the electric power-assisted bicycle is provided with a cadence Hall sensor, which obtains cadence output information. An exemplary cadence Hall sensor with 20 pairs of poles is used. When the user pedals 1 / 4 of a circle, the corresponding cadence Hall sensor outputs 5 pulse signals. At this time, the pulse signal is the cadence output information. The control unit obtains the cadence output information output by the cadence sensor, and the cadence is used as an electrical output switch, so that the control unit outputs the corresponding start-up electric power output value.

[0068] S203, obtaining a minimum vehicle starting speed.

[0069] Among them, the minimum vehicle starting speed is the minimum speed value reached by the electric power-assisted bicycle when it is started. The minimum vehicle starting speed can be set according to actual design requirements and stored in the control unit. The embodiment of the present invention does not make specific limitations. For example, the minimum vehicle starting speed can be 5km / h, that is, 1.4m / s, so that the electric power-assisted bicycle is in a stable starting state to avoid sudden starting that affects the user's riding experience.

[0070] S204, obtaining a starting electric power output value according to the pedaling frequency 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 power-assisted bicycle to start at a preset speed.

[0071] Among them, when the user performs a pedaling operation and meets the starting conditions, the control unit outputs the starting electric power output value according to the pedaling output information, the minimum vehicle starting speed, the road slope information and the user's basic information, so that the motor of the electric assisted bicycle starts at the minimum vehicle starting speed. After starting, the user rides normally, and the electric power output value of the motor will be adjusted in real time, thereby ensuring that the user's running volume during riding meets the user's exercise target value.

[0072] 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: ; Wherein, 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 power-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 conversion efficiency of electromechanical energy. Exemplarily, the static friction coefficient μ between the tire and the ground can be 0.18, the conversion efficiency of electromechanical energy conversion η1 can be 0.8, the weight of the electric power-assisted bicycle can be set in the control unit during the production process, and the weight of the user can be set in the control unit according to the user's own settings and can be flexibly adjusted before riding.

[0073] S205, obtaining the user's exercise target value and user basic information.

[0074] S206, obtaining real-time riding speed.

[0075] S207, obtaining the power-assisted electric power output value of the electric power-assisted bicycle in the power-assisted state according to the user's exercise target value, the user's basic information, the road slope information and the real-time riding speed.

[0076] In the embodiment of the present invention, the road slope information is obtained; the pedaling frequency output information is obtained; the minimum vehicle starting speed is obtained; the starting electric power output value is obtained according to the pedaling frequency output information, the minimum vehicle starting speed, the road slope information and the user's basic information, so as to drive the motor of the electric power-assisted bicycle to start at a preset speed; the user's exercise target value and the user's basic information are obtained; the real-time riding speed is obtained; and the power-assisted electric power output value of the electric power-assisted bicycle in the power-assisted state is obtained according to the user's exercise target value, the user's basic information, the road slope information and the real-time riding speed. Ensure that the user's exercise target value is achieved, and at the same time, the power-assisted electric power output value is adjusted accordingly to improve the user's riding experience.

[0077] Optional, Figure 3 A flowchart of another method for controlling electric power output of an electric power-assisted bicycle provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the method includes:

[0078] S301, obtaining road slope information.

[0079] S302, obtaining cadence output information.

[0080] S303, obtaining a minimum vehicle starting speed.

[0081] S304, obtaining a starting electric power output value according to the pedaling frequency output information, the minimum vehicle starting speed, the road slope information and the user basic information to drive the motor of the electric power-assisted bicycle to start at the minimum vehicle starting speed.

[0082] S305, obtaining the user's exercise target value and user basic information.

[0083] S306, obtaining real-time riding speed.

[0084] S307, obtaining the user power output value according to the user exercise target value and the user basic information.

[0085] Among them, since the user sets the user exercise volume target value, the control unit can obtain the user power output value that the user needs to output during the user's riding process based on the user exercise volume target value and the user's basic information, so as to meet the user's running exercise volume to reach the user's running volume target value and complete the exercise goal.

[0086] Optionally, based on a second formula, the user power output value is obtained according to the user exercise target value and the user basic information, and the second formula is: ; Wherein, P2 is the user's power output value, METs is the user's exercise target value, m is the total mass of the electric power-assisted bicycle and the user, C is the energy conversion coefficient, and B is the energy and power conversion coefficient. Exemplarily, the energy and power conversion coefficient B can be based on the formula , where η2 is the average efficiency of human motion, usually the average efficiency of human motion η2 can be 0.24; η3 is the working efficiency of the motor, usually the working efficiency of the motor η3 can be 0.8.

[0087] S308, obtaining the mechanical power value of the whole vehicle according to the real-time riding speed, road slope information and user basic information.

[0088] Among them, when the user rides the electric power-assisted bicycle, the whole vehicle mechanical power value is generated. The whole vehicle mechanical power value includes the user output power and the motor assist output power.

[0089] Optionally, based on a third formula, the mechanical power value of the vehicle is obtained according to the real-time riding speed, road slope information and user basic information. The third formula is: ; Among them, P3 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, k is the drag coefficient, and v1 is the real-time riding speed.

[0090] S309, obtaining the assisting electric power output value of the electric assisting bicycle in the assisting state according to the user power output value and the mechanical power value of the whole vehicle.

[0091] Among them, the assisted electric power output value of the electric assisted bicycle can be obtained by calculating the difference between the mechanical power value of the whole vehicle and the power output value of the user, so as to adjust the assisted electric power output value of the electric assisted bicycle in the assisted state accordingly at different riding speeds and different slopes, so as to ensure the completion of the user's exercise target value and the user's riding experience.

[0092] In the embodiment of the present invention, road slope information is obtained; pedaling frequency output information is obtained; the minimum vehicle starting speed is obtained; the starting electric power output value is obtained according to the pedaling frequency output information, the minimum vehicle starting speed, the road slope information and the user's basic information, so as to drive the motor of the electric power-assisted bicycle to start at a preset speed; the user's exercise target value and the user's basic information are obtained; the real-time riding speed is obtained; the user's power output value is obtained according to the user's exercise target value and the user's basic information; the whole vehicle mechanical power value is obtained according to the real-time riding speed, the road slope information and the user's basic information; the power-assisted electric power output value of the electric power-assisted bicycle in the power-assisted state is obtained according to the user's power output value and the whole vehicle mechanical power value. Ensure that the user's exercise target value is achieved, and at the same time, the power-assisted electric power output value is adjusted accordingly to improve the user's riding experience.

[0093] Optional, Figure 4 A flowchart of another method for controlling electric power output of an electric power-assisted bicycle provided by an embodiment of the present invention is shown in FIG. Figure 4 As shown, the method includes:

[0094] S401, obtaining road slope information.

[0095] S402, obtaining cadence output information.

[0096] S403, obtaining a minimum vehicle starting speed.

[0097] S404, obtaining a starting electric power output value according to the pedaling frequency 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 power-assisted bicycle to start at a low vehicle starting speed.

[0098] S405, obtaining the user's exercise target value and user basic information.

[0099] S406, obtaining real-time riding speed.

[0100] S407, obtaining the user power output value according to the user exercise target value and the user basic information.

[0101] S408, obtaining the mechanical power value of the whole vehicle according to the real-time riding speed, road slope information and user basic information.

[0102] S409, obtaining the assisting electric power output value of the electric assisting bicycle in the assisting state according to the user power output value and the mechanical power value of the whole vehicle.

[0103] S410, obtaining a user's heart rate correlation coefficient.

[0104] Among them, during the user's riding process, it is necessary to obtain the user's heart rate in real time. When the user's heart rate is too high, the resistance electric power output value is appropriately increased to reduce the user's riding intensity, control the increase in the user's heart rate, and ensure the user's riding safety.

[0105] S411, obtaining an assisting electric power adjustment value according to the user's heart rate correlation coefficient and the assisting electric power output value.

[0106] Among them, the assisting electric power adjustment value is generated according to the user's heart rate correlation coefficient and the assisting electric power output value, so as to adjust the assisting electric power output value according to the user's heart rate changes and ensure the user's riding safety.

[0107] In the embodiment of the present invention, after obtaining the power-assisted electric power output value of the electric power-assisted bicycle in the power-assisted state according to the user power output value and the mechanical power value of the whole vehicle, the user heart rate correlation coefficient is obtained; and the power-assisted electric power adjustment value is obtained according to the user heart rate correlation coefficient and the power-assisted electric power output value. During the user's riding process, the power-assisted electric power output value is adjusted accordingly according to the user's heart rate correlation coefficient to ensure the user's safety during the riding process.

[0108] Optional, Figure 5 A flowchart of another method for controlling electric power output of an electric power-assisted bicycle provided by an embodiment of the present invention is shown in FIG. Figure 5 As shown, the method includes:

[0109] S501, obtaining road slope information.

[0110] S502, obtaining cadence output information.

[0111] S503, obtaining a minimum vehicle starting speed.

[0112] S504, obtaining a starting electric power output value according to the pedaling frequency 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 power-assisted bicycle to start at the minimum vehicle starting speed.

[0113] S505, obtaining the user's exercise target value and user basic information.

[0114] S506, obtaining real-time riding speed.

[0115] S507: Obtain the user power output value according to the user exercise target value and the user basic information.

[0116] S508, obtaining the mechanical power value of the whole vehicle according to the real-time riding speed, road slope information and user basic information.

[0117] S509, obtaining the assisting electric power output value of the electric assisting bicycle in the assisting state according to the user power output value and the mechanical power value of the whole vehicle.

[0118] S510: Obtain the maximum heart rate value of the user according to the basic information of the user.

[0119] Among them, the user age information is extracted from the user basic information, and the user's maximum heart rate value is calculated based on the user's age information and the formula: user's maximum heart rate value = 220-age.

[0120] S511, obtaining a first preset heart rate value and a second preset heart rate value according to the maximum heart rate value of the user, wherein the first preset heart rate value is greater than the second preset heart rate value.

[0121] Among them, the preset heart rate range is obtained according to the maximum heart rate value of the user. For example, the first preset heart rate value may be equal to the maximum heart rate value of the user - 20, and the second preset heart rate value may be equal to the maximum heart rate value of the user - 50.

[0122] S512: Obtain a preset heart rate difference according to the first preset heart rate value and the second preset heart rate value.

[0123] The preset heart rate difference is obtained by performing a difference calculation based on the first preset heart rate value and the second preset heart rate value. For example, the preset heart rate difference may be 30.

[0124] S513, obtaining the user's real-time heart rate value.

[0125] Among them, the user's heart rate data is collected in real time through the sports watch or sports bracelet carried by the user, and communicated with the control unit in the electric power-assisted electric vehicle through wireless transmission. The wireless transmission can be Bluetooth transmission or 4G transmission, and the data is displayed on the dashboard of the electric power-assisted electric vehicle.

[0126] S514, obtaining a user's heart rate correlation coefficient according to the user's real-time heart rate value, the preset heart rate difference value and the first preset heart rate value, or obtaining a user's heart rate correlation coefficient according to the user's real-time heart rate value, the preset heart rate difference value and the second preset heart rate value.

[0127] Among them, when the user's real-time heart rate value reaches the first preset heart rate value, the user's heart rate correlation coefficient is obtained according to the user's real-time heart rate value, the preset heart rate difference and the first preset heart rate value. At this time, since the first preset heart rate value is at the maximum heart rate value, it is necessary to avoid the user's power output, so that the power-assisted electric power output is used as the total output, effectively ensuring the user's riding safety. When the user's real-time heart rate value reaches the second preset heart rate value, the user's heart rate correlation coefficient is obtained according to the user's real-time heart rate value, the preset heart rate difference and the second preset heart rate value. At this time, since the second preset heart rate value is at a larger heart rate value, it is necessary to increase the power-assisted electric power output value, appropriately reduce the user's power output, reduce the user's riding exercise intensity, and actively control the user's heart rate from rising too fast to ensure the user's riding safety.

[0128] Optionally, based on the fourth formula, the user's heart rate correlation coefficient is obtained. The fourth formula is: A=(Δbpm / d) 2 +1; wherein A is the user's 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.

[0129] S515: Obtain an assisting electric power adjustment value according to the user's heart rate correlation coefficient and the assisting electric power output value.

[0130] The embodiment of the present invention obtains the maximum heart rate value of the user according to the basic information of the user; obtains the first preset heart rate value and the second preset heart rate value according to the maximum heart rate value of the user, the first preset heart rate value is greater than the second preset heart rate value; obtains the preset heart rate difference according to the first preset heart rate value and the second preset heart rate value; obtains the real-time heart rate value of the user; obtains the user's heart rate correlation coefficient according to the user's real-time heart rate value, the preset heart rate difference and the first preset heart rate value, or obtains the user's heart rate correlation coefficient according to the user's real-time heart rate value, the preset heart rate difference and the second preset heart rate value, and obtains the assisting electric power adjustment value according to the user's heart rate correlation coefficient and the assisting electric power output value, so as to adjust the assisting electric power output value according to the user's heart rate correlation coefficient to obtain the assisting electric power adjustment value, thereby ensuring the riding safety of the user during riding and ensuring the riding experience of the user.

[0131] Based on the same inventive concept, an embodiment of the present invention further provides an electric power output control device for an electric power-assisted bicycle. Figure 6 A schematic diagram of the structure of an electric power output control device for an electric power-assisted bicycle provided by the present invention, such as Figure 6 As shown, the electric power output control device of the electric power-assisted bicycle executes the electric power output control method of the electric power-assisted bicycle described in any one of the above aspects. The electric power output control device of the electric power-assisted bicycle can be implemented by software and / or hardware. The electric power output control device of the electric power-assisted bicycle includes:

[0132] The road surface slope information acquisition module 201 is used to acquire road surface slope information;

[0133] A user exercise target value and user basic information acquisition module 202, used to acquire the user exercise target value and user basic information;

[0134] A real-time riding speed acquisition module 203 is used to acquire the real-time riding speed;

[0135] The power-assisted electric power output value acquisition module 204 is used to acquire the power-assisted electric power output value of the electric power-assisted bicycle in the power-assisted state according to the user's exercise target value, the user's basic information and the road slope information.

[0136] The electric power output control device for an electric power-assisted bicycle provided in an embodiment of the present invention includes the technical features of the electric power output control method for an electric power-assisted bicycle provided in any embodiment of the present invention, and can achieve the beneficial effects of the electric power output control method for an electric power-assisted bicycle provided in any embodiment of the present invention. The similarities can be referred to the above description of the electric power output control method for an electric power-assisted bicycle provided in an embodiment of the present invention, and will not be repeated here.

[0137] Based on the same inventive concept, an embodiment of the present invention further provides an electric power-assisted bicycle, which includes a motor, a sensor unit, a communication unit and a control unit, wherein the control unit is respectively connected to the motor, the sensor unit and the communication unit; a controller is used to execute the electric power output control method of the electric power-assisted bicycle provided in any embodiment of the present invention. Therefore, the electric power-assisted bicycle provided in an embodiment of the present invention includes the technical features of the electric power output control method of the electric power-assisted bicycle provided in any embodiment of the present invention, and can achieve the beneficial effects of the electric power output control method of the electric power-assisted bicycle provided in any embodiment of the present invention. The similarities can be referred to the above description of the electric power output control method of the electric power-assisted bicycle provided in the embodiment of the present invention, which will not be repeated here.

[0138] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling electric power output of an electric power-assisted bicycle, characterized in that: include: Obtain road slope information; Obtain the user's exercise target value and basic user information; Get real-time riding speed; The assist electric power output value of the electric assist bicycle in the assist state is obtained according to the user exercise target value, the user basic information, the road slope information and the real-time riding speed.

2. The electric power output control method of the electric power-assisted bicycle according to claim 1, characterized in that: Before obtaining the user's exercise target value and basic user information, it also includes: Get cadence output information; Get the minimum vehicle starting speed; A starting electric power output value is obtained according to the pedaling frequency output information, the minimum vehicle starting speed, the road slope information and the user basic information to drive the motor of the electric power-assisted bicycle to start at the minimum vehicle starting speed.

3. The electric power output control method of the electric power-assisted bicycle according to claim 2, characterized in that: Based on the first formula, the starting electric power output value is obtained according to the pedaling frequency output information, the minimum vehicle starting speed, the road slope information and the user basic information. The first formula is: ； Among them, 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 conversion efficiency of electromechanical energy.

4. The electric power output control method of the electric power-assisted bicycle according to claim 1, characterized in that: Acquiring the assisting electric power output value of the electric assisting bicycle in the assisting state according to the user's exercise amount target value, the user's basic information, the road slope information and the real-time riding speed includes: Acquire a user power output value according to the user exercise target value and the user basic information; Acquire the mechanical power value of the whole vehicle according to the real-time riding speed, the road slope information and the basic information of the user; The assist electric power output value of the electric assist bicycle in the assist state is obtained according to the user power output value and the whole vehicle mechanical power value.

5. The electric power output control method of the electric power-assisted bicycle according to claim 4, characterized in that: Based on the second formula, the user power output value is obtained according to the user exercise target value and the user basic information, and the second formula is: ； Among them, 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 coefficient, and B is the energy and power conversion coefficient.

6. The electric power output control method of the electric power-assisted bicycle according to claim 4, characterized in that: Based on the third formula, the mechanical power value of the whole vehicle is obtained according to the real-time riding speed, the road slope information and the user basic information. The third formula is: ； Among them, P3 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, k is the drag coefficient, and v1 is the real-time riding speed.

7. The electric power output control method of the electric power-assisted bicycle according to claim 1, characterized in that: After obtaining the assisting electric power output value of the electric assisting bicycle in the assisting state according to the user's exercise amount target value, the user's basic information, the road slope information and the real-time riding speed, the method further includes: Get the user's heart rate correlation coefficient; The assisting electric power adjustment value is obtained according to the user heart rate correlation coefficient and the assisting electric power output value.

8. The electric power output control method of the electric power-assisted bicycle according to claim 7, characterized in that: Obtaining the user's heart rate correlation coefficient includes: Get the user's maximum heart rate value based on the user's basic information; Acquire a first preset heart rate value and a second preset heart rate value according to the maximum heart rate value of the user, wherein the first preset heart rate value is greater than the second preset heart rate value; Acquire a preset heart rate difference according to the first preset heart rate value and the second preset heart rate value; Get the user's real-time heart rate value; The user's heart rate correlation coefficient is obtained according to the user's real-time heart rate value, the preset heart rate difference and the first preset heart rate value, or the user's heart rate correlation coefficient is obtained according to the user's real-time heart rate value, the preset heart rate difference and the second preset heart rate value.

9. An electric power output control device for an electric power-assisted bicycle, characterized in that: The electric power output control device of the electric power-assisted bicycle executes the electric power output control method of the electric power-assisted bicycle according to any one of claims 1 to 8, and the electric power output control device of the electric power-assisted bicycle comprises: A road surface slope information acquisition module is used to acquire road surface slope information; A user exercise target value and user basic information acquisition module, used to acquire the user exercise target value and user basic information; A real-time riding speed acquisition module is used to obtain the real-time riding speed; The assisting electric power output value acquisition module is used to acquire the assisting electric power output value of the electric assisting bicycle in the assisting state according to the user's exercise target value, the user's basic information and the road slope information.

10. An electric power-assisted bicycle, characterized in that: The electric power-assisted bicycle comprises 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 controller is used to execute the electric power output control method of the electric power-assisted bicycle according to any one of claims 1 to 8.

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