Safe driving system for electric bicycle and control method of safe driving system

Abstract

The invention discloses a safe driving system for an electric bicycle and a control method thereof, and belongs to the technical field of electric bicycles, the safe driving system comprises a motor control system, a sensor module, a control module and an alarm module, the input end of the control module is connected with the output end of the sensor module; the output end of the control module is connected with the input end of the motor control system; the output end of the control module is connected with the input end of the alarm module. By means of the safe driving system for the electric bicycle and the control method of the safe driving system, safe driving of the electric bicycle driver can be achieved according to the health state of the electric bicycle driver.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric bicycles, and in particular, relates to a safe driving system for electric bicycles and a control method thereof. Background Art

[0002] In recent years, electric bicycles are becoming my country's "national means of transportation" due to their economic and convenient features. According to statistics from the China Bicycle Association, in recent years, my country's annual sales of electric bicycles have exceeded 30 million, and the number of electric bicycles in the society is close to 300 million, ranking first in the world.

[0003] However, current electric vehicles cannot guarantee safe driving according to the driver's health status.

[0004] Patent CN206850924U discloses an intelligent monitoring system for electric bicycles, including an intelligent camera for capturing images of electric bicycles during travel, a controller unit for providing core control for the system, a display unit for displaying images and parameters, a power supply unit, and control buttons; the controller unit includes a wireless communication module and a GPS positioning module; the controller unit is respectively connected to the intelligent camera, the display unit, the power supply unit, and the control buttons.

[0005] However, the technology disclosed in the above patent cannot achieve safe driving of the electric bicycle driver according to the health status of the electric bicycle driver. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a safe driving system for an electric bicycle and a control method thereof in view of the deficiencies in the prior art, so as to achieve the purpose of enabling the electric bicycle driver to drive safely according to the health status of the electric bicycle driver.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] The present invention provides a safe driving system for an electric bicycle, comprising a motor control system, a sensor module, a control module and an alarm module, wherein the input end of the control module is connected to the output end of the sensor module; the output end of the control module is connected to the input end of the motor control system; and the output end of the control module is connected to the input end of the alarm module.

[0009] Furthermore, the sensor module includes an optical sensor and a photoplethysmography (PPG) sensor, and the input end of the control module is connected to the output end of the optical sensor; the input end of the control module is connected to the output end of the photoplethysmography (PPG) sensor.

[0010] Further, the optical sensor is arranged on the handlebar of the electric bicycle; the photoplethysmography (PPG) sensor is arranged on the handlebar of the electric bicycle.

[0011] Furthermore, the optical sensor monitors the heart rate information of the electric bicycle driver and inputs it into the control module; the photoplethysmography (PPG) sensor monitors the blood flow rate information of the electric bicycle driver and inputs it into the control module.

[0012] Furthermore, the control module determines the relationship between the average of the heart rate value and the blood flow velocity value of the electric bicycle driver and the first threshold value and the second threshold value.

[0013] Furthermore, when the control module determines that the average of the heart rate value and the blood flow rate value of the electric bicycle driver is not less than the first threshold and not greater than the second threshold, the control module inputs a speed limit instruction to the motor control system and controls the alarm module to alarm.

[0014] Furthermore, when the control module determines that the average of the heart rate value and the blood flow rate value of the electric bicycle driver is greater than the second threshold value, the control module inputs an instruction to prohibit the electric bicycle from starting to the motor control system.

[0015] Further, the first threshold is 48; the second threshold is 73.

[0016] The present invention also provides a control method for a safe driving system of an electric bicycle, the method comprising the following steps:

[0017] S1: The optical sensor monitors the driver's heart rate information and inputs it to the control module; the photoplethysmography (PPG) sensor monitors the driver's blood flow rate information and inputs it to the control module;

[0018] S2: The control module determines the relationship between the average of the heart rate value and the blood flow rate value of the electric bicycle driver and the first threshold value and the second threshold value; if the control module determines that the average of the heart rate value and the blood flow rate value of the electric bicycle driver is not less than the first threshold value and not greater than the second threshold value, then enter S3; if the control module determines that the average of the heart rate value and the blood flow rate value of the electric bicycle driver is greater than the second threshold value, then enter S4;

[0019] S3: The control module inputs the speed limit command to the motor control system and controls the alarm module to alarm;

[0020] S4: The control module inputs a command to prohibit the electric bicycle from starting to the motor control system.

[0021] The safe driving system and control method thereof of the present invention have the following advantages:

[0022] (1) The safe driving system and control method thereof of the present invention can enable the electric bicycle driver to drive safely according to the health status of the electric bicycle driver.

[0023] (2) The safe driving system and control method of the present invention can prevent personal injuries caused by loss of control of the electric bicycle due to sudden abnormalities in the health of the electric bicycle driver.

[0024] (3) The heart rate information and blood flow rate information of the electric bicycle driver can be obtained through the safe driving system and control method thereof of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] This specification includes the following drawings, which show the following contents:

[0026] Figure 1 It is a logical structure block diagram of a safe driving system for an electric bicycle of the present invention;

[0027] Figure 2 It is a flow chart of a control method for a safe driving system of an electric bicycle of the present invention.

[0028] Explanation of the accompanying drawings: 1. Motor control system; 2. Sensor module; 3. Control module; 4. Alarm module; 21. Optical sensor; 22. Photoplethysmography (PPG) sensor. DETAILED DESCRIPTION

[0029] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0030] Figure 1 It is a logical structure block diagram of a safe driving system for an electric bicycle of the present invention, comprising a motor control system 1, a sensor module 2, a control module 3 and an alarm module 4, wherein the input end of the control module 3 is connected to the output end of the sensor module 2; the output end of the control module 3 is connected to the input end of the motor control system 1; the output end of the control module 3 is connected to the input end of the alarm module 4. Among them, the sensor module 2 comprises an optical sensor 21 and a photoplethysmography (PPG) sensor 22, the input end of the control module 3 is connected to the output end of the optical sensor 21; the input end of the control module 3 is connected to the output end of the photoplethysmography (PPG) sensor 22. In addition, the optical sensor 21 is arranged on the handlebar of the electric bicycle; the photoplethysmography (PPG) sensor 22 is arranged on the handlebar of the electric bicycle; and thus the heart rate information and blood flow rate information of the driver of the electric bicycle can be obtained.

[0031] Combine the following Figure 1 The working principle of the safe driving system for electric bicycles of the present invention is as follows:

[0032] When the electric bicycle driver is driving the electric bicycle, the optical sensor 21 monitors the heart rate information of the electric bicycle driver and inputs it into the control module 3; the photoplethysmography (PPG) sensor 22 monitors the blood flow rate information of the electric bicycle driver and inputs it into the control module 3. Specifically, the optical sensor 21 emits a light beam to the skin surface of the electric bicycle driver and receives the reflected light, thereby calculating the heart rate of the electric bicycle driver according to the changes in the light beams, and inputs the calculated heart rate information of the electric bicycle driver into the control module 3; the photoplethysmography (PPG) sensor 22 measures the blood flow rate of the electric bicycle driver through the absorption of light by the blood in the blood vessels of the electric bicycle driver, and inputs the measured blood flow rate information of the electric bicycle driver into the control module 3.

[0033] The control module 3 determines the relationship between the average of the heart rate value and blood flow rate value of the electric bicycle driver and the first threshold value and the second threshold value; if the control module 3 determines that the average of the heart rate value and blood flow rate value of the electric bicycle driver is not less than the first threshold value and not greater than the second threshold value, the control module 3 inputs a speed limit instruction to the motor control system 1 and controls the alarm module 4 to alarm; if the control module 3 determines that the average of the heart rate value and blood flow rate value of the electric bicycle driver is greater than the second threshold value, the control module 3 inputs an instruction to prohibit the electric bicycle from starting to the motor control system 1. Specifically, after the control module 3 receives the heart rate information of the electric bicycle driver input by the optical sensor 21 and the blood flow rate information of the electric bicycle driver input by the photoplethysmogram (PPG) sensor 22, the control module 3 calculates the average of the heart rate value and the blood flow rate value of the electric bicycle driver based on the heart rate information and the blood flow rate information of the electric bicycle driver, and determines whether the average is less than the first threshold value. If the control module 3 determines that the average is less than the first threshold value, the control module 3 does not take any action. If the control module 3 determines that the average is not less than the first threshold value, the control module 3 will further determine whether the average is greater than the second threshold value. If the control module 3 determines that the average is not greater than the second threshold value, the control module 3 will input a speed limit instruction to the motor control system 1 and control the alarm module 4 to alarm. If the control module 3 determines that the average is greater than the second threshold value, the control module 3 will input an instruction to prohibit the electric bicycle from starting to the motor control system 1.

[0034] Among them, after receiving the speed limit instruction input by the control module 3, the motor control system 1 will control the maximum speed that the electric bicycle can reach to be no greater than the threshold speed. In this specific embodiment, the threshold speed is 10km / h; the alarm module 4 alarm means that the alarm module 4 will make a sound as an alarm; after receiving the instruction input by the control module 3 to prohibit the electric bicycle from starting, the motor control system 1 will control to cut off the power source of the electric bicycle. That is, the electric bicycle driver can drive safely according to the health status of the electric bicycle driver, and can also prevent injuries caused by the electric bicycle out of control due to sudden abnormalities in the health of the electric bicycle driver.

[0035] In addition, when the electric bicycle is restarted, the entire system will be re-judged.

[0036] Figure 2 The present invention is a flowchart of a control method for a safe driving system of an electric bicycle, the method comprising the following steps:

[0037] S1: The optical sensor 21 monitors the driver's heart rate information and inputs it to the control module 3; the photoplethysmography (PPG) sensor 22 monitors the driver's blood flow rate information and inputs it to the control module 3; that is, the corresponding Figure 2 S1 in. Specifically, when the electric bicycle driver is driving the electric bicycle, the optical sensor 21 emits a light beam to the skin surface of the electric bicycle driver and receives the reflected light, thereby calculating the heart rate of the electric bicycle driver according to the changes in these light signals, and inputs the calculated heart rate information of the electric bicycle driver to the control module 3; the photoplethysmogram (PPG) sensor 22 measures the blood flow rate of the electric bicycle driver through the absorption of light by the blood in the blood vessels of the electric bicycle driver, and inputs the measured blood flow rate information of the electric bicycle driver to the control module 3.

[0038] S2: The control module 3 determines the relationship between the average of the heart rate value and the blood flow rate value of the electric bicycle driver and the first threshold value and the second threshold value; if the control module 3 determines that the average of the heart rate value and the blood flow rate value of the electric bicycle driver is not less than the first threshold value and not greater than the second threshold value, then enter S3; if the control module 3 determines that the average of the heart rate value and the blood flow rate value of the electric bicycle driver is greater than the second threshold value, then enter S4; that is, corresponding to Figure 2S2 in. Specifically, after the control module 3 receives the heart rate information of the electric bicycle driver input by the optical sensor 21 and the blood flow rate information of the electric bicycle driver input by the photoplethysmogram (PPG) sensor 22, the control module 3 calculates the mean of the heart rate value and the blood flow rate value of the electric bicycle driver according to the heart rate information and the blood flow rate information of the electric bicycle driver, and determines whether the mean is less than the first threshold value. If the control module 3 determines that the mean is less than the first threshold value, the control module 3 does not take any action. If the control module 3 determines that the mean is not less than the first threshold value, the control module 3 further determines whether the mean is greater than the second threshold value. If the control module 3 determines that the mean is not greater than the second threshold value, it enters S3. If the control module 3 determines that the mean is greater than the second threshold value, it enters S4.

[0039] S3: The control module 3 inputs the speed limit command to the motor control system 1 and controls the alarm module 4 to alarm; Figure 2 S3 in. Specifically, the control module 3 will input the speed limit instruction to the motor control system 1 and control the alarm module 4 to alarm. After receiving the speed limit instruction input by the control module 3, the motor control system 1 will control the maximum speed that the electric bicycle can reach to be no greater than the threshold speed. In this specific embodiment, the threshold speed is 10km / h, and the alarm module 4 alarm means that the alarm module 4 will make a sound as an alarm. That is, the electric bicycle driver can drive safely according to the health status of the electric bicycle driver, and can also prevent injuries caused by the electric bicycle out of control due to sudden abnormalities in the health of the electric bicycle driver.

[0040] S4: The control module 3 inputs a command to prohibit the electric bicycle from starting to the motor control system 1; Figure 2 S4 in the figure. Specifically, the control module 3 will input the instruction of prohibiting the electric bicycle from starting to the motor control system 1. After receiving the instruction of prohibiting the electric bicycle from starting input by the control module 3, the motor control system 1 will control to cut off the power source of the electric bicycle. When the electric bicycle restarts, the whole system will re-judge. That is, the electric bicycle driver can drive safely according to the health status of the electric bicycle driver, and can also prevent injuries caused by the electric bicycle out of control due to sudden abnormalities in the health of the electric bicycle driver.

[0041] In this specific implementation, the first threshold is 48 and the second threshold is 73. However, the first threshold and the second threshold are not limited to 48 and 73 respectively, but can be adjusted according to specific circumstances.

[0042] In addition, in this specific implementation, the alarm module 4 may use a buzzer; the control module 3 may use STM32F205VFT6.

[0043] Functions and Effects of the Embodiments

[0044] After the control module 3 receives the heart rate information of the electric bicycle driver input by the optical sensor 21 and the blood flow rate information of the electric bicycle driver input by the photoplethysmogram (PPG) sensor 22, the control module 3 calculates the mean of the heart rate value and the blood flow rate value of the electric bicycle driver according to the heart rate information and the blood flow rate information of the electric bicycle driver, and determines whether the mean is less than the first threshold value. If the control module 3 determines that the mean is less than the first threshold value, the control module 3 does not take any action. If the control module 3 determines that the mean is not less than the first threshold value, the control module 3 will further determine whether the mean is greater than the second threshold value. If the control module 3 determines that the mean is not greater than the second threshold value, the control module 3 will input a speed limit instruction to the motor control system 1 and control the alarm module 4 to alarm. If the control module 3 determines that the mean is greater than the second threshold value, the control module 3 will input an instruction to prohibit the electric bicycle from starting to the motor control system 1. Among them, after receiving the speed limit instruction input by the control module 3, the motor control system 1 will control the maximum speed that the electric bicycle can reach to be no greater than the threshold speed. In this specific embodiment, the threshold speed is 10km / h; the alarm module 4 alarm means that the alarm module 4 will make a sound as an alarm; after receiving the instruction input by the control module 3 to prohibit the electric bicycle from starting, the motor control system 1 will control to cut off the power source of the electric bicycle. That is, the electric bicycle driver can drive safely according to the health status of the electric bicycle driver, and can also prevent injuries caused by the electric bicycle out of control due to sudden abnormalities in the health of the electric bicycle driver.

[0045] The optical sensor 21 is arranged on the handlebar of the electric bicycle; the photoplethysmography (PPG) sensor 22 is arranged on the handlebar of the electric bicycle; and thus the heart rate information and blood flow rate information of the electric bicycle driver can be obtained.

[0046] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A safe driving system for an electric bicycle, characterized in that: It includes a motor control system, a sensor module, a control module and an alarm module. The input end of the control module is connected to the output end of the sensor module; the output end of the control module is connected to the input end of the motor control system; and the output end of the control module is connected to the input end of the alarm module.

2. A safe driving system for an electric bicycle as claimed in claim 1, characterized in that: The sensor module includes an optical sensor and a photoplethysmography (PPG) sensor, the input end of the control module is connected to the output end of the optical sensor; the input end of the control module is connected to the output end of the photoplethysmography (PPG) sensor.

3. A safe driving system for an electric bicycle as claimed in claim 2, characterized in that: The optical sensor is arranged on the handlebar of the electric bicycle; and the photoplethysmography (PPG) sensor is arranged on the handlebar of the electric bicycle.

4. A safe driving system for an electric bicycle as claimed in claim 3, characterized in that: The optical sensor monitors the heart rate information of the electric bicycle driver and inputs the heart rate information to the control module; the photoplethysmography (PPG) sensor monitors the blood flow rate information of the electric bicycle driver and inputs the heart rate information to the control module.

5. A safe driving system for an electric bicycle as claimed in claim 4, characterized in that: The control module determines the relationship between the average of the heart rate value and the blood flow rate value of the electric bicycle driver and the first threshold value and the second threshold value.

6. A safe driving system for an electric bicycle as claimed in claim 5, characterized in that: When the control module determines that the average of the heart rate value and the blood flow rate value of the electric bicycle driver is not less than the first threshold value and not greater than the second threshold value, the control module inputs a speed limit instruction to the motor control system and controls the alarm module to alarm.

7. A safe driving system for an electric bicycle as claimed in claim 5, characterized in that: When the control module determines that the average of the heart rate value and the blood flow rate value of the electric bicycle driver is greater than the second threshold, the control module inputs an instruction to prohibit the electric bicycle from starting to the motor control system.

8. A safe driving system for an electric bicycle as claimed in any one of claims 5 to 7, characterized in that: The first threshold is 48; the second threshold is 73.

9. A control method for a safe driving system for an electric bicycle according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: S1: The optical sensor monitors the driver's heart rate information and inputs it to the control module; the photoplethysmography (PPG) sensor monitors the driver's blood flow rate information and inputs it to the control module; S2: The control module determines the relationship between the average of the heart rate value and the blood flow rate value of the electric bicycle driver and the first threshold value and the second threshold value; if the control module determines that the average of the heart rate value and the blood flow rate value of the electric bicycle driver is not less than the first threshold value and not greater than the second threshold value, then enter S3; if the control module determines that the average of the heart rate value and the blood flow rate value of the electric bicycle driver is greater than the second threshold value, then enter S4; S3: The control module inputs the speed limit command to the motor control system and controls the alarm module to alarm; S4: The control module inputs a command to prohibit the electric bicycle from starting to the motor control system.

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