阅读说明：本技术 电动自行车助力控制方法及其助力控制系统 (Power-assisted control method and power-assisted control system of electric bicycle ) 是由 陈文彦 于 2020-04-14 设计创作，主要内容包括：本发明提供一种电动自行车助力控制方法及其助力控制系统,应用于电动自行车的运算处理器。该电动自行车助力控制方法包含有定义多个体能等级与相对应的第一功率区间及第二功率区间,取得体能等级与目标心律区间,以及量测当前踩踏功率与当前心律。该当前心律落在该目标心律区间时,该运算处理器判断该当前踩踏功率落在该第一功率区间则输出二级马达助力,若判断该当前踩踏功率落在该第二功率区间则输出三级马达助力,如此,能够参考用户的当前心律且能进一步读取与分析使用者的当前踩踏功率来提供合适的马达助力。(The invention provides a power-assisted control method and a power-assisted control system of an electric bicycle, which are applied to an arithmetic processor of the electric bicycle. The power-assisted control method of the electric bicycle comprises the steps of defining a plurality of physical strength grades and corresponding first power intervals and second power intervals, obtaining the physical strength grades and target heart rate intervals, and measuring the current treading power and the current heart rate. When the current heart rhythm is within the target heart rhythm interval, the operation processor judges that the current treading power is within the first power interval and outputs secondary motor power assistance, and if the current treading power is within the second power interval, outputs tertiary motor power assistance, so that the current heart rhythm of a user can be referred and the current treading power of the user can be further read and analyzed to provide proper motor power assistance.)

1. A power-assisted control method of an electric bicycle is applied to an arithmetic processor of the electric bicycle, the arithmetic processor is electrically connected with a treading power device, a heart rhythm monitor and a power-assisted motor, and the power-assisted control method of the electric bicycle comprises the following steps:

defining a plurality of physical ability grades and corresponding first power intervals and second power intervals, wherein the second power intervals are larger than the first power intervals;

obtaining a physical fitness level to identify the corresponding first power interval and the second power interval;

obtaining a target heart rhythm interval;

respectively measuring the current treading power and the current heart rate by using the treading power device and the heart rate monitor; and

when the current heart rhythm is within the target heart rhythm interval, judging that the current treading power is within the first power interval, driving the power-assisted motor to output two-level motor power assistance, and judging that the current treading power is within the second power interval, driving the power-assisted motor to output three-level motor power assistance;

wherein, the three-stage motor assistance is larger than the two-stage motor assistance.

2. The power assist control method of an electric bicycle according to claim 1, further comprising the steps of:

when the current heart rate is lower than the target heart rate interval, judging that the current treading power falls in the first power interval, driving the power-assisted motor to output the first-stage motor power assistance, and judging that the current treading power falls in the second power interval, driving the power-assisted motor to output the second-stage motor power assistance;

wherein the primary motor assist is less than the secondary motor assist.

3. The power assist control method of an electric bicycle according to claim 1, further comprising the steps of:

when the current heart rate is higher than the target heart rate interval, judging that the current stepping power falls in the first power interval, driving the power-assisted motor to output the three-stage motor power assistance, and judging that the current stepping power falls in the second power interval, driving the power-assisted motor to output the four-stage motor power assistance;

wherein, the four-stage motor assistance is larger than the three-stage motor assistance.

4. The method of claim 1, wherein obtaining the target cardiac rhythm interval comprises:

acquiring training intensity and user data; and

and substituting the training intensity into the user data to calculate the target rhythm interval according with the user data.

5. The method of claim 4, wherein the user data includes a user age and a resting heart rate, the user age is used to calculate a maximum heart rate, the maximum heart rate and the resting heart rate are used to calculate a heart rate reserve, and the target heart rate interval is a calculation result of the heart rate reserve, the training intensity and the resting heart rate.

6. The power assist control method of an electric bicycle according to claim 5, further comprising the steps of:

calculating the difference between the current rhythm and the target rhythm interval, and comparing the difference with the threshold range of the rhythm reserve to determine whether the current rhythm is lower than, higher than or within the target rhythm interval.

7. The method as claimed in claim 1, wherein the motor-assisted powers of different orders represent different operating efficiencies of the assist motor.

8. The power assist control method of an electric bicycle according to claim 1, further comprising the steps of:

and confirming a third power interval corresponding to the physical ability grade, and driving the power-assisted motor to output four-stage motor power assistance if judging that the current stepping power falls in the third power interval, wherein the second power interval is smaller than the third power interval, and the four-stage motor power assistance is larger than the three-stage motor power assistance.

9. The power assist control method of an electric bicycle according to claim 2, further comprising the steps of:

and confirming a third power interval corresponding to the physical ability grade, and driving the power-assisted motor to output the three-level motor power assistance if judging that the current stepping power falls in the third power interval, wherein the second power interval is smaller than the third power interval.

10. The power assist control method of an electric bicycle according to claim 3, further comprising the steps of:

and confirming a third power interval corresponding to the physical ability grade, and driving the power-assisted motor to output five-stage motor power assistance if judging that the current stepping power falls in the third power interval, wherein the second power interval is smaller than the third power interval, and the five-stage motor power assistance is larger than the four-stage motor power assistance.

11. A power-assisted control system applied to an electric bicycle comprises:

a stepping power device for measuring the current stepping power;

a heart rate monitor for measuring a current heart rate;

the power-assisted motor is used for outputting motor power assistance of different stages; and

the operation processor is electrically connected with the treading power device, the heart rhythm monitor and the power-assisted motor, defines a plurality of physical energy levels and corresponding first power intervals and second power intervals, acquires the physical energy levels to confirm the corresponding first power intervals and second power intervals, acquires a target heart rhythm interval, judges that the current treading power falls in the first power intervals and then drives the power-assisted motor to output secondary motor power when the current heart rhythm falls in the target heart rhythm interval, and judges that the current treading power falls in the second power intervals and then drives the power-assisted motor to output tertiary motor power when the current treading power falls in the target heart rhythm interval;

the second power interval is larger than the first power interval, and the power of the three-stage motor is larger than that of the two-stage motor.

12. The power assist control system of claim 11 further comprising an input interface, the input interface being electrically connected to the computing processor, the input interface being configured to input the physical fitness level.

13. The system of claim 11, wherein the processor determines that the current pedaling power falls within the first power range to drive the motor to output a primary motor assistance, and determines that the current pedaling power falls within the second power range to drive the motor to output a secondary motor assistance when the current rhythm is lower than the target rhythm range, wherein the primary motor assistance is less than the secondary motor assistance.

14. The system of claim 11, wherein the processor determines that the current pedaling power falls within the first power range to drive the motor to output the three-level motor assistance, and determines that the current pedaling power falls within the second power range to drive the motor to output the four-level motor assistance, wherein the four-level motor assistance is greater than the three-level motor assistance when the current rhythm is higher than the target rhythm range.

15. The assistive control system of claim 12, wherein the computing processor obtains training intensity and user data via the input interface and substitutes the training intensity into the user data to calculate the target rhythm interval that matches the user data.

16. The servo-control system of claim 15 wherein the user data is user age and resting heart rate, the user age is used to calculate maximum heart rate, the maximum heart rate and resting heart rate are used to calculate heart rate reserve, and the target heart rate interval is the calculated result of the heart rate reserve, the training intensity and the resting heart rate.

17. The servo-control system of claim 16 wherein the processor calculates the difference between the current heart rate and the target heart rate interval and compares the difference to a threshold range of the heart rate reserve to determine whether the current heart rate is below, above, or within the target heart rate interval.

18. An assist control system as set forth in claim 11 wherein a plurality of motor assists of different orders represent different operating efficiencies of the assist motor.

19. The power-assisted control system of claim 11, wherein the processor identifies a third power interval corresponding to the physical fitness level, and determines that the current pedaling power falls within the third power interval to drive the power-assisted motor to output a four-level motor power, the second power interval being smaller than the third power interval, and the four-level motor power being greater than the three-level motor power.

20. The system of claim 13, wherein the processor identifies a third power range corresponding to the physical fitness level, and determines that the current pedaling power falls within the third power range to drive the assist motor to output the three-level motor assist.

21. The power-assisted control system of claim 14, wherein the processor identifies a third power interval corresponding to the physical fitness level, and determines that the current pedaling power falls within the third power interval to drive the power-assisted motor to output a five-level motor power, the second power interval being smaller than the third power interval, and the five-level motor power being greater than the four-level motor power.

Technical Field

The present invention relates to a power control method and a power control system for an electric bicycle, and more particularly, to a power control method and a power control system for an electric bicycle, which can prevent a movement injury.

Background

A conventional electric bicycle may be equipped with a power-assisted control system that utilizes a heart rate monitor to measure the current heart rate of the rider of the electric bicycle. If the current heart rate of the rider is higher than the target heart rate interval, the power-assisted control system of the traditional electric bicycle can improve the power assistance, so that the situation that the rider tramples and applies force to try to reduce the heart rate of the rider is reduced, but the heart rate of the rider is lower than the target heart rate interval frequently; if the current heart rate of the rider is lower than the target heart rate interval, the power assisting control system of the traditional electric bicycle reduces the power assisting, so that the pedaling force of the rider is increased, the current heart rate of the rider is increased to be close to or enter the target heart rate interval, and the heart rate of the rider is easy to exceed the target heart rate interval. Therefore, the traditional power-assisted control system of the electric bicycle reflects the magnitude of the output power-assisted force of the motor only according to the current rhythm of the rider, and cannot effectively control the current rhythm of the rider within a target rhythm interval.

Therefore, there is a need to design a novel power-assisted control method and a power-assisted control system for an electric bicycle to overcome the above-mentioned drawbacks.

Disclosure of Invention

The invention aims to provide an electric bicycle power assisting control method and a power assisting control system thereof, which can provide proper motor power assisting by referring to the current heart rhythm of a user and further reading and analyzing the current pedaling power of the user.

In order to achieve the above object, the present invention provides a power-assisted control method for an electric bicycle, applied to an arithmetic processor of the electric bicycle, the arithmetic processor being electrically connected to a treading power unit, a heart rate monitor and a power-assisted motor, the power-assisted control method for the electric bicycle comprising the steps of: defining a plurality of physical ability grades and corresponding first power intervals and second power intervals, wherein the second power intervals are larger than the first power intervals; obtaining a physical fitness level to identify the corresponding first power interval and the second power interval; obtaining a target heart rhythm interval; respectively measuring the current treading power and the current heart rate by using the treading power device and the heart rate monitor; when the current heart rhythm is in the target heart rhythm interval, judging that the current stepping power is in the first power interval, driving the power-assisted motor to output two-level motor power assistance, and judging that the current stepping power is in the second power interval, driving the power-assisted motor to output three-level motor power assistance; wherein, the three-stage motor assistance is larger than the two-stage motor assistance.

Preferably, the method further comprises the following steps: when the current heart rate is lower than the target heart rate interval, judging that the current treading power falls in the first power interval, driving the power-assisted motor to output the first-stage motor power assistance, and judging that the current treading power falls in the second power interval, driving the power-assisted motor to output the second-stage motor power assistance; wherein the primary motor assist is less than the secondary motor assist.

Preferably, the method further comprises the following steps: when the current heart rate is higher than the target heart rate interval, judging that the current stepping power falls in the first power interval, driving the power-assisted motor to output the three-stage motor power assistance, and judging that the current stepping power falls in the second power interval, driving the power-assisted motor to output the four-stage motor power assistance; wherein, the four-stage motor assistance is larger than the three-stage motor assistance.

Preferably, obtaining the target rhythm interval comprises: acquiring training intensity and user data; and substituting the training intensity into the user data to calculate the target rhythm interval according with the user data.

Preferably, the user data is a user age and a resting heart rate, the user age is used for calculating a maximum heart rate, the maximum heart rate and the resting heart rate are used for calculating a heart rate reserve, and the target heart rate interval is a calculation result of the heart rate reserve, the training intensity and the resting heart rate.

Preferably, the method further comprises the following steps: calculating the difference between the current rhythm and the target rhythm interval, and comparing the difference with the threshold range of the rhythm reserve to determine whether the current rhythm is lower than, higher than or within the target rhythm interval.

Preferably, the motor assisting force of different stages represents different operating efficiencies of the assisting motor.

Preferably, the method further comprises the following steps: and confirming a third power interval corresponding to the physical ability grade, and driving the power-assisted motor to output four-stage motor power assistance if judging that the current stepping power falls in the third power interval, wherein the second power interval is smaller than the third power interval, and the four-stage motor power assistance is larger than the three-stage motor power assistance.

Preferably, the method further comprises the following steps: and confirming a third power interval corresponding to the physical ability grade, and driving the power-assisted motor to output the three-level motor power assistance if judging that the current stepping power falls in the third power interval, wherein the second power interval is smaller than the third power interval.

Preferably, the method further comprises the following steps: and confirming a third power interval corresponding to the physical ability grade, and driving the power-assisted motor to output five-stage motor power assistance if judging that the current stepping power falls in the third power interval, wherein the second power interval is smaller than the third power interval, and the five-stage motor power assistance is larger than the four-stage motor power assistance.

The invention also provides a power-assisted control system, which is applied to the electric bicycle and comprises: a stepping power device for measuring the current stepping power; a heart rate monitor for measuring a current heart rate; the power-assisted motor is used for outputting motor power assistance of different stages; the operation processor is electrically connected with the treading power device, the heart rhythm monitor and the power-assisted motor, defines a plurality of physical energy levels and corresponding first power intervals and second power intervals, acquires the physical energy levels to confirm the corresponding first power intervals and second power intervals, acquires a target heart rhythm interval, judges that the current treading power falls in the first power interval and then drives the power-assisted motor to output secondary motor power when the current heart rhythm falls in the target heart rhythm interval, and judges that the current treading power falls in the second power interval and then drives the power-assisted motor to output tertiary motor power when the current treading power falls in the target heart rhythm interval; the second power interval is larger than the first power interval, and the power of the three-stage motor is larger than that of the two-stage motor.

Preferably, the system further comprises an input interface, the input interface is electrically connected to the operation processor, and the input interface is used for inputting the physical ability grade.

Preferably, when the current cardiac rhythm is lower than the target cardiac rhythm interval, the operation processor determines that the current stepping power falls within the first power interval, and drives the assisting motor to output a first-stage motor assisting force, and determines that the current stepping power falls within the second power interval, and drives the assisting motor to output a second-stage motor assisting force, and the first-stage motor assisting force is smaller than the second-stage motor assisting force.

Preferably, when the current cardiac rhythm is higher than the target cardiac rhythm interval, the processor determines that the current stepping power falls within the first power interval and drives the motor to output the three-level motor power, and determines that the current stepping power falls within the second power interval and drives the motor to output the four-level motor power, wherein the four-level motor power is greater than the three-level motor power.

Preferably, the processor obtains training intensity and user data through the input interface, and substitutes the training intensity into the user data to calculate the target rhythm interval according with the user data.

Preferably, the user data is a user age and a resting heart rate, the user age is used for calculating a maximum heart rate, the maximum heart rate and the resting heart rate are used for calculating a heart rate reserve, and the target heart rate interval is a calculation result of the heart rate reserve, the training intensity and the resting heart rate.

Preferably, the computing processor calculates the difference between the current rhythm and the target rhythm interval, and compares the difference with a threshold range of the rhythm reserve to determine whether the current rhythm is lower than, higher than, or within the target rhythm interval.

Preferably, the motor assisting force of different stages represents different operating efficiencies of the assisting motor.

Preferably, the operation processor determines a third power interval corresponding to the physical fitness level, and determines that the current stepping power falls within the third power interval to drive the assist motor to output a four-level motor assist, wherein the second power interval is smaller than the third power interval, and the four-level motor assist is larger than the three-level motor assist.

Preferably, the operation processor determines a third power interval corresponding to the physical fitness level, and drives the power-assisted motor to output the three-level motor power when the current stepping power is determined to fall in the third power interval.

Preferably, the operation processor determines a third power interval corresponding to the physical ability level, and determines that the current pedaling power falls within the third power interval to drive the power-assisted motor to output a five-level motor power, wherein the second power interval is smaller than the third power interval, and the five-level motor power is larger than the four-level motor power.

Compared with the prior art, the power-assisted control method and the power-assisted control system for the electric bicycle provided by the embodiment of the invention not only refer to the current heart rhythm of the user, but also can further read and analyze the current treading power of the user to provide proper motor power assistance. The current treading power can be regarded as the future heart rhythm change trend of the user, namely the current treading power is higher, which indicates that the future heart rhythm of the user is likely to be sharply improved; the current pedaling power is higher, indicating that the user's future heart rate may level or decrease. Therefore, the invention comprehensively judges the current heart rate and the current treading power of the user, and provides proper motor assistance to slowly increase the current heart rate to enter the target heart rate interval when the current heart rate is lower than the target heart rate interval; if the current rhythm of the heart falls within the target rhythm interval, the motor power can be properly provided according to the change of the current stepping power, so that the current rhythm of the heart is stably maintained within the target rhythm interval.

Drawings

FIG. 1 is a functional block diagram of a power assist control system according to an embodiment of the present invention;

FIG. 2 is a flowchart illustrating a method for controlling power assist of an electric bicycle according to an embodiment of the present invention;

FIG. 3 is a functional block diagram of an electric bicycle according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the speed of an electric bicycle according to an embodiment of the present invention;

FIG. 5 is a graphical illustration of a user's current heart rate over time in accordance with one embodiment of the present invention;

FIG. 6 is a schematic diagram of the variation of the current pedaling power of the user with time according to an embodiment of the present invention;

fig. 7 is a schematic diagram of the motor-assisted power of the electric bicycle according to an embodiment of the present invention.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Referring to fig. 1 and fig. 2, fig. 1 is a functional block diagram of a power control system according to an embodiment of the present invention, and fig. 2 is a flowchart of a power control method of an electric bicycle according to an embodiment of the present invention. The assist control system 10 is applied to an electric bicycle. The assistive control system 10 may include a tread power device 12, a heart rate monitor 14, an assistive motor 16, and a computing processor 18. The stepping power device 12 may be installed on a pedal of the electric bicycle to measure a current stepping power of a user of the electric bicycle. The rhythm monitor 14 may be mounted on the user for measuring the current rhythm of the heart. The booster motor 16 drives the bicycle wheel, and can output various levels of motor boosting according to the boosting operation result of the operation processor 18. The processor 18 may be electrically connected to the tread power device 12, the heart rate monitor 14 and the power assist motor 16. The arithmetic processor 18 defines a plurality of physical energy levels and corresponding first power intervals and second power intervals, acquires the physical energy levels to confirm the corresponding first power intervals and second power intervals, acquires a target heart rhythm interval, and when the current heart rhythm falls in the target heart rhythm interval, judges that the current treading power falls in the first power interval, drives the power-assisted motor to output two-level motor power assistance, and judges that the current treading power falls in the second power interval, drives the power-assisted motor to output three-level motor power assistance; the second power interval is larger than the first power interval, and the power of the three-stage motor is larger than that of the two-stage motor. The processor 18 executes the power-assisted control method 101 of the electric bicycle of the present invention to drive the power-assisted motor 16 to output a suitable motor power to avoid motion injury caused by excessive motion during riding.

The assist control system 10 may further include an input interface 20 electrically connected to the processor 18. The user can input the actual physical fitness level, the intensity of the exercise to be performed, and the user-specific data using the input interface 20, so that the processor 18 can calculate the required motor assistance more precisely according to the health condition of the user. For example, the physical performance levels may be classified into poor physical performance, normal physical performance, good physical performance and excellent physical performance, the training intensity may be classified into very light intensity, medium intensity, difficult intensity and extreme intensity, and the user data may be the age, weight and resting heart rate of the user. The classification of fitness level, training intensity and user data according to the present invention is not limited to the above examples, and depends on the actual needs.

Referring to fig. 2, fig. 3 and fig. 7, fig. 3 is a functional block diagram of an electric bicycle according to an embodiment of the present invention, fig. 4 is a schematic diagram of a change in a vehicle speed of the electric bicycle according to an embodiment of the present invention with time, fig. 5 is a schematic diagram of a change in a current heart rhythm of a user according to an embodiment of the present invention with time, fig. 6 is a schematic diagram of a change in a current pedaling power of the user with time according to an embodiment of the present invention, and fig. 7 is a schematic diagram of a change in a motor assisting power of the electric bicycle according to an embodiment of the present invention with time.

Each physical ability grade can be set with a plurality of corresponding power intervals; for example, the present invention sets a first power interval of a low order, a second power interval of a medium order, and a third power interval of a high order. In this embodiment, the low-order power range of the slightly-differentiated physical fitness is defined to be less than 20 watts, the middle-order power range is between 20 and 40 watts, and the high-order power range is greater than 40 watts; the low-order power interval of the general body energy is less than 50 watts, the middle-order power interval is between 50 and 150 watts, and the high-order power interval is more than 150 watts; the low-order power interval of good physical performance is less than 150 watts, the middle-order power interval is between 150 and 250 watts, and the high-order power interval is more than 250 watts; the low-order power range of the excellent physical performance is less than 350 watts, the middle-order power range is between 350 and 450 watts, and the high-order power range is more than 450 watts. The number and value of the power intervals are not limited to the above examples, and depend on the design requirements.

This embodiment may further define the training intensity (intensity) as having an extremely light intensity of fifty to sixty percent, a light intensity of sixty to seventy percent, a medium intensity of seventy to eighty percent, a difficult intensity of eighty to ninety percent, and an extreme intensity of ninety to hundred percent. The percentage interval of each training intensity is not limited to the above example, and depends on the design requirements. Therefore, the assistive control system 10 may substitute the training intensity selected by the user into the user data to calculate the target cardiac rhythm interval according to the health condition of the user. The objective of the present invention is to detect the current pedaling power and the current heart rate generated when the user rides the electric bicycle, and correspondingly drive the assisting motor 16 to output the appropriate motor assisting power, so as to control the current heart rate of the user within the target heart rate interval.

With respect to calculating the target heart rate interval, the assistive control system 10 may define the difference between the user age and the parameter 220 as the Maximum Heart Rate (MHR), then define the difference between the maximum heart rate and the Resting Heart Rate (RHR) as the Heart Rate Reserve (HRR), further obtain the product of the Heart Rate Reserve (HRR) and the preselected training intensity (intensity), and finally consider the sum of the resting heart rate and the product as the target heart rate interval. The calculation formula of the target rhythm interval is not limited to the above example, and may be adjusted according to the change due to race, gender, and the like, and other possible changes are not described in detail herein.

The present invention compares the current heart rate obtained in real time by the heart rate monitor 14 to the target heart rate interval. If the current heart rate continuously rises but does not exceed the target heart rate interval, the motor power can be timely increased along with the increase of the current stepping power so as to avoid the too fast acceleration of the heart rate of the user; if the current heart rate is close to the upper limit of the target heart rate interval, the motor power is also improved due to the improvement of the current treading power, so that the current heart rate slowly increases to enter the target heart rate interval; if the current heart rhythm begins to decline, the motor power is correspondingly increased or decreased along with the change of the current stepping power, so that the heart rhythm of the user can be stably maintained in the target heart rhythm interval.

In this embodiment, the assistive control system 10 may calculate a difference ehr between the current heart rate and the target heart rate interval, regard a comparison result between the difference ehr and a threshold range of the heart rate reserve as a heart rate deviation level, and determine whether the current heart rate is lower than, higher than, or within the target heart rate interval according to the heart rate deviation level; the threshold range may be positive five percent or negative five percent. The method for determining the difference between the current rhythm and the target rhythm interval and the proportional range of the threshold range are not limited to the above examples, and depend on the design requirements.

Thus, the present invention creates a first look-up table A1 that records the heart rate deviation level, power interval, and motor assist. The invention sets the power-assisted motor 16 to output five levels of motor power assistance; one-stage motor assist may represent that the assist motor 16 provides ten percent of operating efficiency, two-stage motor assist may represent that the assist motor 16 provides twenty-five percent of operating efficiency, three-stage motor assist may represent that the assist motor 16 provides fifty percent of operating efficiency, four-stage motor assist may represent that the assist motor 16 provides seventy-five percent of operating efficiency, and five-stage motor assist may represent that the assist motor 16 provides ninety percent of operating efficiency. The operating efficiency value of each level of motor assist is not limited to the above example, and depends on the design requirement. Cases 1, 2 and 3 in the first lookup table a1 represent that the current heart rate is below the target heart rate interval; cases 4, 5 and 6 represent the current rhythm falling within the target rhythm interval; cases 7, 8 and 9 represent the current rhythm being greater than the target rhythm interval.

First lookup table A1

Furthermore, the present invention may also establish a second lookup table A2 for recording the physical performance level and the corresponding power interval, wherein the power value of each power interval varies according to the physical performance level, as mentioned above.

Second lookup table A2

In the electric bicycle assist control method 101, first, step S100 is executed to define a plurality of default physical fitness levels and a plurality of corresponding power intervals. Then, steps S102 and S104 are executed to obtain the actual or customized physical ability level inputted by the user at the input interface 20, so as to confirm the power value ranges of the first power interval, the second power interval and the third power interval corresponding to the input physical ability level through the second lookup table a2, and obtain the target heart rate interval required by the calculation according to the user age and the resting heart rate. Then, step S106 is executed to measure the current pedaling power and the current heart rate of the user at any time by using the pedaling power generator 12 and the heart rate monitor 14. Next, step S108 is performed to detect whether the current rhythm falls within the target rhythm interval.

If the current cardiac rhythm is within the target cardiac rhythm interval, it indicates that the difference ehr is greater than negative five percent of the cardiac rhythm reserve and less than positive five percent of the cardiac rhythm reserve, step S110 is performed to determine the power interval within which the current pedaling power falls. If the current stepping power is in the first power interval, executing step S112, driving the power-assisted motor 16 to output the secondary motor power-assisted force; if the current stepping power is in the second power interval, executing step S114, and driving the assist motor 16 to output the three-stage motor assist; if the current stepping power falls within the third power range, step S116 is executed, and the assist motor 16 is driven to output four-stage motor assist.

If the current rhythm is not within the target rhythm interval, step S118 is executed to compare the relationship between the current rhythm and the target rhythm interval. When the current heart rate is lower than the target heart rate interval, step S120 is performed to determine in which power interval the current pedaling power falls. If the current stepping power is in the first power interval, executing step S122, driving the assist motor 16 to output a primary motor assist force; if the current stepping power is in the second power interval, executing step S124, driving the assist motor 16 to output the secondary motor assist force; if the current depressing power falls within the third power interval, step S126 is performed, and the assist motor 16 is driven to output the three-stage motor assist.

When the current heart rate is higher than the target heart rate interval, step S128 is performed to determine in which power interval the current pedaling power falls. If the current stepping power is in the first power interval, executing step S130, and driving the assist motor 16 to output the three-stage motor assist; if the current stepping power is in the second power interval, executing step S132, driving the assist motor 16 to output four-stage motor assist; if the current stepping power falls within the third power range, step S134 is executed, and the assist motor 16 is driven to output the five-stage motor assist.

As shown in fig. 4, the speed of the electric bicycle usually varies in an irregular and non-quantitative manner during the riding process, and the power assisting control system 10 is mainly used to indirectly control the riding rhythm of the user. In the embodiment shown in fig. 5, 6 and 7, when the user has a slightly poor physical performance level, the first power interval is less than 20 watts, the second power interval is between 20 and 40 watts, and the third power interval is greater than 40 watts, and the target heart rate interval is set to be between 110 and 130 beats per minute. When the user starts riding, the current heart rate is lower than the target heart rate interval, and the current treading power falls in the first power interval and the second power interval, the power-assisted motor 16 can output low-level motor power assistance; the present embodiment marks the low level motor assist as level 0. If the current treading power is increased to the third power interval and the current heart rate is still lower than the target heart rate interval, the power-assisted motor 16 can output the motor power of a medium level, so that the heart rate of the user can be increased slowly; the present embodiment marks the middle level motor assist as level 1, and the assist motor 16 may output a low level motor assist instead when the current stepping power falls to the second power interval. If the current treading power is in the third power interval and the current heart rate enters the target heart rate interval, the power-assisted motor 16 outputs high-level motor power to prevent the heart rate from exceeding the target heart rate interval; in the present embodiment, the high-level motor assist is marked as level 2, and the assist motor 16 is changed to output a middle-level or low-level motor assist when the current stepping power falls within the second power range.

In summary, the power-assisted control method and the power-assisted control system of the electric bicycle of the present invention not only refer to the current heart rate of the user, but also further read and analyze the current pedaling power of the user to provide the proper motor power assistance. The current treading power can be regarded as the future heart rhythm change trend of the user, namely the current treading power is higher, which indicates that the future heart rhythm of the user is likely to be sharply improved; the current pedaling power is higher, indicating that the user's future heart rate may level or decrease. Therefore, the invention comprehensively judges the current heart rate and the current treading power of the user, and provides proper motor assistance to slowly increase the current heart rate to enter the target heart rate interval when the current heart rate is lower than the target heart rate interval; if the current rhythm of the heart falls within the target rhythm interval, the motor power can be properly provided according to the change of the current stepping power, so that the current rhythm of the heart is stably maintained within the target rhythm interval.

Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of preferred embodiments of the present invention and should not be construed as limiting the invention. The scale in the schematic drawings does not represent the scale of actual components for the sake of clarity in describing the required components.

The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.