Bicycle tail lamp system and method capable of detecting motion state of bicycle

Abstract

The invention discloses a bicycle tail lamp system and method capable of detecting the motion state of a bicycle. The bicycle tail lamp system comprises a shell, a control module, a tail lamp driving module, a bicycle tail lamp, a communication module, an acceleration sensor and an angular velocity sensor, wherein the control module, the tail lamp driving module, the bicycle tail lamp, the communication module, the acceleration sensor and the angular velocity sensor are installed in the shell or on the shell. The control module is connected with a bicycle tail lamp through the tail lamp driving module, the control module is connected with a background server through the communication module, and the background server communicates with a user APP; the control module is connected with the acceleration sensor and the angular velocity sensor, the X-axis of the acceleration sensor and the angular velocity sensor is the gravity direction, the Y-axis is the left-right direction of vehicle driving, and the Z-axis is the front-back direction of vehicle driving; the control module reads acceleration and angular velocity values of the vehicle in the X-axis direction, the Y-axis direction and the Z-axis direction based on the acceleration sensor and the angular velocity sensor so as to conduct dynamic and static detection of the vehicle and judgment of braking, vehicle shaking and vehicle falling.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle taillights, and in particular to a bicycle taillight system and method capable of detecting the motion state of a vehicle. Background Art

[0002] At present, bicycles have become an increasingly popular means of transportation, and commuting and daily riding have become a healthy means of transportation favored by people. However, in recent years, the incidence of traffic accidents between bicycles and motor vehicles has increased year by year; the reason is that bicycles lack a way to provide certain safety warnings to surrounding vehicles.

[0003] Although installing a taillight on a bicycle can provide warning and lighting functions to a certain extent, it is unable to detect motion states such as braking, shaking, falling, dynamic and static vehicle conditions, and information interaction, and its working mode is single. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a bicycle taillight system and method capable of detecting the motion state of the vehicle.

[0005] The invention discloses a bicycle taillight system capable of detecting the motion state of a vehicle, comprising: a housing and a control module installed in or on the housing, a taillight driving module, a bicycle taillight, a communication module, an acceleration sensor and an angular velocity sensor;

[0006] The control module is connected to the bicycle taillight through the taillight driving module, the control module is connected to the background server through the communication module, and the background server communicates with the user APP; the control module is connected to the acceleration sensor and the angular velocity sensor, the X-axis of the acceleration sensor and the angular velocity sensor is the gravity direction, the Y-axis is the left and right direction of the vehicle, and the Z-axis is the front and back direction of the vehicle;

[0007] The control module reads the acceleration and angular velocity values ​​of the vehicle in the three axes of X, Y and Z based on the acceleration sensor and the angular velocity sensor to perform dynamic and static detection of the vehicle, as well as judgment of braking, shaking and falling.

[0008] As a further improvement of the present invention, the bicycle taillight system is installed on a taillight mounting bracket below the seat.

[0009] As a further improvement of the present invention, it also includes: GPS, battery, charging interface, power management module and expression button;

[0010] The GPS is connected to the control module and is used to provide location positioning for the device;

[0011] The battery and the charging interface are both connected to the power management module, and the power management module is connected to the control module for supplying power to the device;

[0012] The expression button is connected to the control module and is used to set the display expression or content of the bicycle taillight.

[0013] As a further improvement of the present invention, the control module controls the taillights to display different expressions or contents based on different motion states determined by the vehicle.

[0014] A brake detection method based on the above bicycle taillight system comprises:

[0015] The device periodically collects data from the acceleration sensor;

[0016] The difference between the collected acceleration value in the Z-axis direction and the base value is calculated. When the difference is greater than a first threshold, it is determined that a braking condition has occurred and the taillights are turned on as a warning.

[0017] As a further improvement of the present invention, the base value used for braking judgment is a dynamically adjusted base value, and the dynamic adjustment method of the base value is:

[0018] The device periodically collects data from the acceleration sensor;

[0019] Determine whether the continuously collected acceleration Z-axis values ​​have reached the preset sampling number N;

[0020] If the sampling number N is reached, the average value of the N acceleration values ​​collected in the Z-axis direction is calculated;

[0021] Determine whether the difference between the mean value and the values ​​of the N accelerations collected in the Z-axis direction are all less than a second threshold value M;

[0022] If both are smaller than the second threshold value M, the mean value is updated as the base value and the calibration record value is cleared.

[0023] A bicycle shaking detection method based on the above bicycle taillight system comprises:

[0024] The device periodically collects data from the angular velocity sensor;

[0025] Determine the peak and trough of the waveform formed by the value of the angular velocity in the Z-axis direction;

[0026] If the difference between the current peak and the trough is greater than the third threshold, determine whether the time difference between the current peak and the previous peak is within the fourth threshold;

[0027] If the time difference is within the fourth threshold, the number of valid peaks is increased by 1;

[0028] When the number of effective peaks is greater than the fifth threshold, it is determined that the vehicle shaking condition occurs, and the taillight displays an expression or pattern corresponding to the vehicle shaking condition;

[0029] After the vehicle shaking condition occurs, if the time difference between the current sampling point and the previous peak is greater than the fourth threshold, the vehicle shaking is exited.

[0030] A bicycle fall detection method based on the above bicycle taillight system comprises:

[0031] The device periodically collects data from the acceleration sensor and angular velocity sensor;

[0032] If the value of the angular velocity in the X-axis direction is greater than the sixth threshold, the count of the X-axis is increased by 1;

[0033] If the value of the angular velocity in the Y-axis direction is greater than the seventh threshold, the count of the Y-axis is increased by 1;

[0034] If the value of the angular velocity in the Z-axis direction is greater than the eighth threshold, the count of the Z-axis is increased by 1;

[0035] When the sum of the count values ​​of the three axes is greater than the ninth threshold within a certain period of time, it is determined that the crash condition is met; if the sum of the count values ​​of the three axes is not greater than the ninth threshold within a certain period of time and the vehicle is not in a crashed state, the count values ​​of each axis are cleared to zero;

[0036] After the crash condition is met, if it is detected that the acceleration X-axis value is greater than the tenth threshold, the acceleration X-axis count is increased by 1;

[0037] If the acceleration X-axis count is greater than the eleventh threshold, the crash state is cleared.

[0038] A vehicle dynamic and static detection method based on the bicycle taillight system comprises:

[0039] The device periodically collects data from the acceleration sensor; when the values ​​of the acceleration in the X-axis, Y-axis, and Z-axis directions are all less than a certain value, the vehicle is judged to be static; at this time, the taillights are turned off.

[0040] A vehicle dynamic and static detection method based on the bicycle taillight system comprises:

[0041] The device periodically collects data from the acceleration sensor;

[0042] When one of the acceleration values ​​in the X-axis, Y-axis and Z-axis directions is greater than a certain value, the vehicle is judged to be in a dynamic state, and the taillights and GPS are turned on.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] The bicycle taillight system of the present invention can realize the detection of motion states such as braking, rocking, falling, dynamic and static state of the vehicle, and can interact with the taillight to turn it on / off, display different graphics, etc., as well as automatic control of the taillight. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a framework diagram of the bicycle taillight system capable of detecting the vehicle motion state disclosed in the present invention;

[0046] Figure 2 A flowchart of the brake detection disclosed in the present invention;

[0047] Figure 3 for Figure 2 Flowchart of dynamic adjustment of the base value;

[0048] Figure 4 This is a flow chart of the vehicle shaking detection disclosed in the present invention;

[0049] Figure 5 This is a flow chart of the vehicle crash detection disclosed in the present invention;

[0050] Figure 6 A flow chart for judging whether the static condition of a vehicle disclosed in the present invention is satisfied;

[0051] Figure 7 The present invention is a flowchart for judging whether the vehicle dynamic conditions disclosed in the present invention are satisfied. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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 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 are within the scope of protection of the present invention.

[0053] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0054] like Figure 1 As shown, the present invention provides a bicycle taillight system capable of detecting the motion state of a vehicle. The bicycle taillight system is an integrated device, which is mounted on a taillight mounting bracket under a seat. The device comprises: a housing and a control module mounted in or on the housing, a taillight driving module, a communication module, a bicycle taillight, a GPS, a battery, a charging interface, a power management module, a mode button, an expression button, an acceleration sensor and an angular velocity sensor.

[0055] The bicycle taillight is connected to the taillight driving module, which is connected to the control module; the GPS is connected to the control module; the battery and the charging interface are both connected to the power management module, which is connected to the control module; the control module is connected to the mode button, which is used to switch the taillight between the normal mode and the sentinel mode. When the mode button is short pressed, it displays that the current working mode of the taillight is the normal mode or the sentinel mode, and when it is long pressed, it switches between the normal mode and the sentinel mode; normal mode: the taillight is turned on, and the dynamic reporting period is T1; sentinel mode: the taillight is turned off, and the dynamic reporting period is T2, and T2 is less than T1. The expression button is connected to the control module and is used to set different expressions or contents to be displayed on the bicycle taillight; the control module is connected to the background server through the communication module, and the background server communicates with the user APP; the X-axis of the acceleration sensor and the angular velocity sensor is the direction of gravity, the Y-axis is the left and right direction of the vehicle, and the Z-axis is the front and back direction of the vehicle. The acceleration sensor and the angular velocity sensor are used to detect the acceleration and angular velocity of the vehicle's X-axis, Y-axis and Z-axis respectively; the control module reads the acceleration and angular velocity values ​​of the vehicle in the three axes of X, Y and Z based on the acceleration sensor and the angular velocity sensor to perform dynamic and static detection of the vehicle, as well as judgment of braking, shaking and falling; and based on the different motion states judged by the vehicle, the taillight is controlled to display different expressions For example, when the vehicle is detected to be braking, the control module automatically controls the taillights to turn on or flash continuously; when the brakes are released, the taillights are turned off or flash continuously; when the vehicle is detected to be shaking, the control module automatically controls the taillights to display eye-catching expressions such as smiley faces, increasing the fun of riding and interaction with other riders or pedestrians; when the vehicle is detected to have fallen, the control module automatically controls the taillights to turn on or flash continuously; when the brakes are released, the taillights are turned off or flash continuously; at the same time, the control module can also alarm and upload relevant data through the communication module background and the user after the fall; when the vehicle is detected to be from dynamic to static, the control module can control the taillights to turn off; when the vehicle is detected to be from static to dynamic, the control module can control the taillights and GPS to turn on. It should be noted that the above-mentioned taillight display content based on different vehicle states and turning on and off can be set by the user according to needs.

[0056] Specific:

[0057] The control module adopts BLE SoC, which integrates the System On Chip chip that supports Bluetooth BLE function, including BLE radio frequency and MCU microcontroller;

[0058] The communication module adopts a cellular Cat.1 communication module for cellular communication to complete the interaction between the device and the background server; the cellular Cat.1 communication module is equipped with a cellular SIM card;

[0059] The bicycle taillight uses a COB LED light board;

[0060] The taillight driver module uses a matrix LED driver chip;

[0061] The battery adopts lithium-ion battery;

[0062] The power management module uses PMU;

[0063] The charging port uses a Type-C USB port for charging the device;

[0064] Acceleration sensor and angular velocity sensor, read the acceleration and angular velocity values ​​of the vehicle in the three axes of X, Y and Z, so as to perform dynamic and static detection of the equipment, as well as judgment of braking, shaking and falling;

[0065] GPS: Used to locate the device when it is turned on.

[0066] like Figure 2 As shown, the present invention provides a brake detection method based on the above bicycle taillight system, comprising:

[0067] S11, the device periodically collects data in the X, Y and Z axis directions of the acceleration sensor and the angular velocity sensor; wherein the sampling period is set according to actual needs, six values ​​are sampled in one sampling period, and only the value in the acceleration Z axis direction is used when making a braking judgment;

[0068] S12. Calculate the difference between the value of the acceleration in the Z-axis direction collected and the base value BRK. When the difference is greater than a first threshold, it is determined that a braking condition has occurred, and the taillights are turned on to provide a prompt or other responses are made. The value of the acceleration in the Z-axis direction collected above is a positive value, and the first threshold is set according to actual needs.

[0069] The base value used for braking judgment in the present invention is a dynamically adjusted base value, which realizes dynamic adjustment of the base value by continuously tracking the value of the acceleration in the Z-axis direction, thereby adapting to changes in different riding environments, such as uphill, downhill, etc.

[0070] like Figure 3 As shown, the dynamic adjustment method of the base value of the present invention is:

[0071] S21, the device periodically collects data in the X, Y and Z axis directions of the acceleration sensor and angular velocity sensor;

[0072] S22, determining whether the values ​​of the acceleration Z-axis direction collected continuously have reached a preset sampling number N; wherein the sampling number N is set according to actual needs, such as N is 5;

[0073] S23, if the preset sampling number N is not reached, continue to collect; if the sampling number N is reached, calculate the average of the N acceleration values ​​collected in the Z-axis direction;

[0074] S24, determine the average value and the value of the Z-axis direction of the N accelerations collected (a 1 、a 2 , …, a N ) are all less than the second threshold M, that is, both satisfying: a 1 -mean<M,a 2 -mean<M,…,a N -mean < M;

[0075] S25. If they are all less than the second threshold value M, the mean value is updated as the base value, and the calibration record value is cleared; otherwise, the base value is not updated, and the collection and judgment of N consecutive groups of data in the next sampling period are performed again.

[0076] like Figure 4 As shown, the present invention provides a method for detecting a bicycle shaking based on the above bicycle taillight system. The bicycle shaking action is a common one in road bicycles. The present invention mainly determines the peak and trough of the waveform of the angular velocity value in the Z-axis direction, and then determines whether the bicycle shaking occurs; the method comprises:

[0077] S31, the device periodically collects data in the X, Y and Z axis directions of the acceleration sensor and the angular velocity sensor; wherein the sampling period is set according to actual needs, six values ​​are sampled in one sampling period, and only the value of the angular velocity Z axis direction (the angular velocity value rotating around the Z axis) is used when determining whether the vehicle is shaking;

[0078] S32, judging the peak and trough of the waveform formed by the value of the angular velocity in the Z-axis direction; specifically: judging whether the newly collected value of the angular velocity in the Z-axis direction changes from small to large, or from large to small; the process from small to large is the trough, and the process from large to small is the peak;

[0079] S33, if the difference between the current peak and the trough is greater than the third threshold, it is determined that the rocking amplitude meets the amplitude specified by the rocking condition; at this time, continue to determine whether the time difference between the current peak and the previous peak is within the fourth threshold; wherein the third threshold and the fourth threshold are set according to actual needs;

[0080] S34, if the time difference is within the fourth threshold, the number of valid peaks is increased by 1; if the time difference is not within the fourth threshold, it is an ineffective peak; when the number of valid peaks is greater than the fifth threshold, it is determined that the rocking condition occurs, and the taillight displays the expression or pattern corresponding to the rocking; under the premise that the amplitude of a single rocking meets the requirements, the present invention further determines whether the rocking frequency meets the frequency specified by the rocking condition by determining whether the time difference between the current peak and the previous peak is within the fourth threshold and whether the number of valid peaks is greater than the fifth threshold, and eliminates the situation where the error is rocking due to occasional large-amplitude rocking or multiple large-amplitude rocking with a long time interval; wherein the fifth threshold is set according to actual needs;

[0081] S35. After the vehicle shaking condition is generated, if the time difference between the current sampling point and the previous peak is greater than a fourth threshold, then exit the vehicle shaking process.

[0082] like Figure 5 As shown, the present invention provides a fall detection method based on the above bicycle taillight system, comprising:

[0083] S41, the device periodically collects data from the acceleration sensor and the angular velocity sensor;

[0084] S42, if the value of the angular velocity in the X-axis direction is greater than the sixth threshold, the count of the X-axis is increased by 1;

[0085] S43, if the value of the angular velocity in the Y-axis direction is greater than the seventh threshold, the count of the Y-axis is increased by 1;

[0086] S44, if the value of the angular velocity in the Z-axis direction is greater than the eighth threshold, the count of the Z-axis is increased by 1;

[0087] S45, within a certain period of time, when the sum of the count values ​​of the three axes is greater than a ninth threshold, it is determined that the fall condition is met; within a certain period of time, if the sum of the count values ​​of the three axes is not greater than the ninth threshold, and the rider is not in a fall state, the count value of each axis is cleared; wherein the ninth threshold is set as a threshold value obtained by an instantaneous fall, and during normal riding, the sum of the count values ​​of the three axes is not greater than the ninth threshold;

[0088] S46, after the fall condition is met, when the car is lifted up, that is, the car is stood up and stationary, the acceleration sensor can be used to detect the acceleration value of the axis in the direction of the earth's gravity in this state. When the value is maintained for a period of time, the fall state is cancelled. Considering a certain inclination, the value can be within a certain range. Specifically:

[0089] If it is detected that the acceleration X-axis value is greater than the tenth threshold, the acceleration X-axis count is increased by 1;

[0090] If the acceleration X-axis count is greater than the eleventh threshold, the crash state is cleared.

[0091] Among them, the sixth threshold to the eleventh threshold are set according to actual needs.

[0092] like Figure 6 As shown, the present invention provides a vehicle dynamic and static detection method for a bicycle taillight system, comprising:

[0093] S51, the device periodically collects data from the acceleration sensor;

[0094] S52, when the value of the acceleration X-axis is less than a certain value, the static count is increased by 1, otherwise, the static count is cleared;

[0095] S53, when the value of the acceleration Y axis is less than a certain value, the static count is increased by 1, otherwise, the static count is cleared;

[0096] S54, when the value of the acceleration Z axis is less than a certain value, the static count is increased by 1, otherwise, the static count is cleared;

[0097] S55. Within a certain period of time, when the static count is greater than a certain value, it is determined that the vehicle is in a static state; at this time, the taillights are turned off.

[0098] like Figure 7 As shown, the present invention provides a vehicle dynamic and static detection method for a bicycle taillight system, comprising:

[0099] S61, the device periodically collects data from the acceleration sensor;

[0100] S62. When one of the acceleration values ​​in the X-axis, Y-axis and Z-axis directions is greater than a certain value, it is determined that the vehicle is in a dynamic state, and the taillights and GPS are turned on.

[0101] Based on this, the bicycle taillight system of the present invention can realize the detection of motion states such as braking, rocking, falling, dynamic and static of the vehicle, and can interact with the taillight on / off, display different graphics, etc. and automatically control the taillight.

[0102] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bicycle taillight system capable of detecting vehicle motion status, characterized in that: include: A housing and a control module, a taillight driving module, a bicycle taillight, a communication module, an acceleration sensor and an angular velocity sensor installed in or on the housing; The control module is connected to the bicycle taillight through the taillight driving module, the control module is connected to the background server through the communication module, and the background server communicates with the user APP; the control module is connected to the acceleration sensor and the angular velocity sensor, the X-axis of the acceleration sensor and the angular velocity sensor is the gravity direction, the Y-axis is the left and right direction of the vehicle, and the Z-axis is the front and back direction of the vehicle; The control module reads the acceleration and angular velocity values ​​of the vehicle in the three axes of X, Y and Z based on the acceleration sensor and the angular velocity sensor to perform dynamic and static detection of the vehicle, as well as judgment of braking, shaking and falling.

2. The bicycle taillight system according to claim 1, characterized in that: The bicycle taillight system is installed on a taillight mounting bracket below the seat.

3. The bicycle taillight system according to claim 1, characterized in that: Also includes: GPS, battery, charging port, power management module and expression button; The GPS is connected to the control module and is used to provide location positioning for the device; The battery and the charging interface are both connected to the power management module, and the power management module is connected to the control module for supplying power to the device; The expression button is connected to the control module and is used to set the display expression or content of the bicycle taillight.

4. The bicycle taillight system according to claim 1, characterized in that: The control module controls the taillights to display different expressions or contents based on different motion states determined by the vehicle.

5. A brake detection method for a bicycle taillight system according to any one of claims 1 to 4, characterized in that: include: The device periodically collects data from the acceleration sensor; The difference between the collected acceleration value in the Z-axis direction and the base value is calculated. When the difference is greater than a first threshold, it is determined that a braking condition has occurred and the taillights are turned on as a warning.

6. The brake detection method according to claim 5, characterized in that: The base value used for braking judgment is a dynamically adjusted base value, and the dynamic adjustment method of the base value is: The device periodically collects data from the acceleration sensor; Determine whether the continuously collected acceleration Z-axis values ​​have reached the preset sampling number N; If the sampling number N is reached, the average value of the N acceleration values ​​collected in the Z-axis direction is calculated; Determine whether the difference between the mean value and the values ​​of the N accelerations collected in the Z-axis direction are all less than a second threshold value M; If both are smaller than the second threshold value M, the mean value is updated as the base value and the calibration record value is cleared.

7. A bicycle shaking detection method based on the bicycle taillight system according to any one of claims 1 to 4, characterized in that: include: The device periodically collects data from the angular velocity sensor; Determine the peak and trough of the waveform formed by the value of the angular velocity in the Z-axis direction; If the difference between the current peak and the trough is greater than the third threshold, determine whether the time difference between the current peak and the previous peak is within the fourth threshold; If the time difference is within the fourth threshold, the number of valid peaks is increased by 1; When the number of effective peaks is greater than the fifth threshold, it is determined that the vehicle shaking condition occurs, and the taillight displays an expression or pattern corresponding to the vehicle shaking condition; After the vehicle shaking condition occurs, if the time difference between the current sampling point and the previous peak is greater than the fourth threshold, the vehicle shaking is exited.

8. A bicycle fall detection method based on the bicycle taillight system according to any one of claims 1 to 4, characterized in that: include: The device periodically collects data from the acceleration sensor and angular velocity sensor; If the value of the angular velocity in the X-axis direction is greater than the sixth threshold, the count of the X-axis is increased by 1; If the value of the angular velocity in the Y-axis direction is greater than the seventh threshold, the count of the Y-axis is increased by 1; If the value of the angular velocity in the Z-axis direction is greater than the eighth threshold, the count of the Z-axis is increased by 1; When the sum of the count values ​​of the three axes is greater than the ninth threshold within a certain period of time, it is determined that the crash condition is met; if the sum of the count values ​​of the three axes is not greater than the ninth threshold within a certain period of time and the vehicle is not in a crashed state, the count values ​​of each axis are cleared to zero; After the crash condition is met, if it is detected that the acceleration X-axis value is greater than the tenth threshold, the acceleration X-axis count is increased by 1; If the acceleration X-axis count is greater than the eleventh threshold, the crash state is cleared.

9. A vehicle dynamic and static detection method based on the bicycle taillight system according to any one of claims 1 to 4, characterized in that: include: The device periodically collects data from the acceleration sensor; When the acceleration values ​​in the X-axis, Y-axis and Z-axis directions are all less than a certain value, the vehicle is judged to be in a static state; At this time, turn off the tail lights.

10. A vehicle dynamic and static detection method based on the bicycle taillight system according to any one of claims 1 to 4, characterized in that: include: The device periodically collects data from the acceleration sensor; When one of the acceleration values ​​in the X-axis, Y-axis and Z-axis directions is greater than a certain value, the vehicle is judged to be in a dynamic state, and the taillights and GPS are turned on.

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