System and method for displaying motorcade expressions of bicycle taillights at same frequency

Abstract

The invention discloses a motorcade expression same-frequency display system and method for bicycle taillights, and the method comprises the steps: a background sends the starting time of motorcade same-frequency to each device through a 4G communication module, and the unit is second; based on the starting time of the same frequency of the motorcade, the time information obtained from the MEMA data and the accurate time synchronization of 1PPS, the frame to which the LED expression content of the current bicycle tail lamp is played and the remaining time of the frame from the next frame are determined; and updating the display frame and the frame time based on the number of played frames and the remaining time from the frame to the next frame. The expressions of the motorcade bicycle tail lamp are displayed at the same frequency, and the application effect of the bicycle tail lamp is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle taillights, and in particular to a system and method for displaying the same frequency of expressions of a fleet of bicycle taillights. 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 taillights on bicycles can provide some warning and lighting functions, the existing bicycle taillights have only one function and no further expansion application. When bicycles are grouped together, they need to have a unified logo and synchronized playback content to make the group more eye-catching; although some existing bicycle taillights can display a unified logo, the logo is mostly static or the dynamic logo content is not synchronized. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a system and method for synchronously displaying the expressions of a bicycle team using bicycle taillights.

[0005] The invention discloses a fleet expression synchronous display system of bicycle taillights, comprising: a housing and a control module installed in or on the housing, a taillight driving module, a bicycle taillight, a communication module, a GPS, a battery, a charging interface, a power management module and an expression button;

[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 GPS is connected to the control module to provide the device with location positioning and precise timing signal 1PPS; the battery and charging interface are both connected to the power management module, and the power management module is connected to the control module to power the device; the expression button is connected to the control module to set the display expression or content of the bicycle taillight;

[0007] The GPS sends a precise timing signal 1PPS to the control module, and the GPS and the control module communicate data through the UART_TX and UART_RX serial ports; the GPS outputs NEMA data every second, and the NEMA data contains time information; 1PPS outputs a pulse every second, and uses MEMA data and 1PPS signals to synchronize the time between bicycle taillights of different vehicles, that is, to achieve synchronization of taillight display content playback between devices; wherein, the NEMA data is sent by the GPS to the control module through the serial port, and the amount of NEMA data is different at a time, and the relationship between each 1PPS and the corresponding MEMA is that 1PPS is output before the MEMA data, so the time in the previous MEMA data of the 1PPS signal plus 1s is used as the precise time of this 1PPS.

[0008] As a further improvement of the present invention, the fleet expression synchronous display system of the bicycle taillight is installed on the taillight mounting bracket under the seat.

[0009] As a further improvement of the present invention, it also includes: a mode button;

[0010] The control module is connected to the mode button, and the mode button is used to directly switch the taillight between mode one and mode two; wherein, when the mode button is short pressed, it displays that the current working mode of the taillight is mode one or mode two, and when it is long pressed, it realizes the switching between mode one and mode two; mode one is the normal mode, the taillight is turned on, and the dynamic reporting period is T1; mode two is the sentinel mode, the taillight is turned off, and the dynamic reporting period is T2, and T2 is less than T1.

[0011] The present invention also discloses a method for synchronizing the expression of a bicycle taillight fleet, comprising:

[0012] The background sends the start time of the fleet synchronization (i.e. the start time of the expression synchronization) to each device via 4G, in seconds; based on the start time of the fleet synchronization, the time information obtained from the MEMA data and the precise time synchronization of 1PPS, it determines the frame that the LED expression content of the current bicycle taillight has been played to and the remaining time from this frame to the next frame; based on the number of frames that have been played and the remaining time from this frame to the next frame, the display frame and frame time are updated.

[0013] As a further improvement of the present invention, it specifically includes:

[0014] Determine whether the 1PPS signal is received;

[0015] If a 1PPS signal is received, it is determined whether there is MEMA data;

[0016] If there is MEMA data, add 1 second to the time in the MEMA data as the precise time of the 1PPS.

[0017] Determine whether the fleet synchronization time has arrived;

[0018] If the fleet synchronization time is reached, the time difference between the start time and the current time is calculated, and the current playing frame and the remaining time from this frame to the next frame are calculated;

[0019] Based on the number of frames that have been played and the remaining time from the current frame to the next frame, the displayed frame and frame time are updated and continuously monitored.

[0020] As a further improvement of the present invention, it also includes:

[0021] If the 1PPS signal is not received, the monitoring continues;

[0022] If no MEMA data is received, monitoring continues;

[0023] If the fleet synchronization time has not arrived, monitoring will continue.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention can determine the frame to which the LED expression content of the current bicycle taillight has been played and the remaining time from this frame to the next frame based on the start time of the fleet's synchronous frequency, the time information obtained from the MEMA data and the precise time synchronization of 1PPS, thereby realizing the synchronous frequency display of the expressions of the fleet's bicycle taillights and enhancing the application effect of the bicycle taillights. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a framework diagram of the system for displaying the facial expressions of a group of bicycle taillights in the same frequency according to the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of hardware connection between control module and GPS;

[0028] Figure 3 for Figure 2 The timing diagram of 1PPS signal and MEMA data transmission and reception;

[0029] Figure 4 The present invention discloses a flow chart of a method for synchronously displaying expressions of a fleet of bicycle taillights. DETAILED DESCRIPTION

[0030] 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.

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0032] like Figure 1 As shown, the present invention provides a fleet expression synchronous display system for bicycle taillights, which is an integrated device, which is installed on the taillight mounting bracket under the seat; the device includes: a shell and a control module installed in or on the shell, a taillight drive module, a bicycle taillight, a communication module, a mode button, a GPS, a battery, a charging interface, a power management module and an expression button.

[0033] 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 expression button is connected to the control module and is used to set the display expression or content of the bicycle taillight; 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 realizes the switching between the normal mode and the sentinel mode; the normal mode and the sentinel mode are shown in Table 1; the control module is connected to the background server through the communication module, and the background server communicates with the user APP.

[0034] Table 1

[0035] model Taillight LED Dynamic reporting cycle ordinary Open 5 minutes sentinel closure 10 seconds

[0036] Specific:

[0037] 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;

[0038] 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;

[0039] The bicycle taillight uses a COB LED light board;

[0040] The taillight driver module uses a matrix LED driver chip;

[0041] The battery adopts lithium-ion battery;

[0042] The power management module uses PMU;

[0043] The charging port uses a Type-C USB port for charging the device;

[0044] GPS: Used to locate the device.

[0045] like Figure 2 , 3 As shown, the synchronous display of the expression of the fleet means that the LED expression content displayed on the LED dot matrix of the bicycle taillight is played frame by frame. When multiple taillights are teamed, the synchronous playback between the taillights can be achieved; and the synchronous playback between the taillights is achieved through the positioning timing signal 1PPS of the GPS positioning module. In the synchronous display system of the expression of the fleet of bicycle taillights of the present invention, the GPS sends a precise timing signal 1PPS to the control module, and its timing accuracy can reach within 50ns; that is, the time difference of the output signal of the pin between different devices is within 50nS. Data communication is carried out between the GPS and the control module through the UART_TX and UART_RX serial ports.

[0046] The GPS positioning module will output a NEMA data per second, where the NEMA data contains time information; and 1PPS means outputting one pulse per second. Figure 3 Taking high level trigger as an example, MEMA data and 1PPS signal can be used to synchronize the time between devices, that is, to synchronize the taillight display content playback between different devices. Among them, NEMA is sent to the control module through the UART serial port, and the amount of NEMA data is different at a time, and the relationship between each 1PPS and the corresponding MEMA is that 1PPS is output before the MEMA data, so the time in the previous MEMA data of the 1PPS signal plus 1s can be used as the precise time of this 1PPS.

[0047] A method for displaying the same frequency of expressions of a bicycle team by taillights of bicycles, comprising:

[0048] The background sends the start time of the fleet synchronization to each device via 4G in seconds. Based on the start time of the fleet synchronization, the time information obtained from the MEMA data and the precise time synchronization of 1PPS, it determines the frame that the LED expression content of the current bicycle taillight has been played to and the remaining time from this frame to the next frame. Based on the number of frames that have been played and the remaining time from this frame to the next frame, the display frame and frame time are updated.

[0049] like Figure 4 As shown, the method for displaying the same frequency of the expressions of the fleet specifically includes:

[0050] S1. Determine whether a 1PPS signal is received;

[0051] S2. If a 1PPS signal is received, determine whether there is MEMA data; if no 1PPS signal is received, continue monitoring;

[0052] S3. If there is MEMA data, take the time in the MEMA data plus 1s as the precise time of this 1PPS; if no MEMA data is received, continue monitoring;

[0053] S4, judging whether the fleet synchronization time has arrived;

[0054] S5. If the fleet synchronization time has arrived, the time difference between the start time and the current time is calculated, and the current playing frame and the remaining time from the frame to the next frame are calculated; if the fleet synchronization time has not arrived, the monitoring is continued;

[0055] S6. Based on the number of frames that have been played and the remaining time from the current frame to the next frame, update the displayed frame and frame time, and continue monitoring.

[0056] The advantages of the present invention are:

[0057] The present invention can determine the frame to which the LED expression content of the current bicycle taillight has been played and the remaining time from this frame to the next frame based on the start time of the fleet's synchronous frequency, the time information obtained from the MEMA data and the precise time synchronization of 1PPS, thereby realizing the synchronous frequency display of the expressions of the fleet's bicycle taillights and enhancing the application effect of the bicycle taillights.

[0058] 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 system for displaying the facial expressions of a bicycle team using the same frequency as the taillights of a bicycle, characterized in that: include: A housing and a control module installed in or on the housing, a taillight driving module, a bicycle taillight, a communication module, a GPS, a battery, a charging interface, a power management module and an expression button; 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 GPS is connected to the control module to provide the device with location positioning and precise timing signal 1PPS; the battery and charging interface are both connected to the power management module, and the power management module is connected to the control module to power the device; the expression button is connected to the control module to set the display expression or content of the bicycle taillight; The GPS sends a precise timing signal 1PPS to the control module, and the GPS and the control module communicate data through the UART_TX and UART_RX serial ports; the GPS outputs NEMA data every second, and the NEMA data contains time information; 1PPS outputs a pulse every second, and uses MEMA data and 1PPS signals to synchronize the time between bicycle taillights of different vehicles, that is, to achieve synchronization of taillight display content playback between devices; wherein, the NEMA data is sent by the GPS to the control module through the serial port, and the amount of NEMA data is different at a time, and the relationship between each 1PPS and the corresponding MEMA is that 1PPS is output before the MEMA data, so the time in the previous MEMA data of the 1PPS signal plus 1s is used as the precise time of this 1PPS.

2. The bicycle taillight fleet expression synchronous display system as claimed in claim 1, characterized in that: The fleet expression synchronous display system of the bicycle tail light is installed on the tail light mounting bracket under the seat.

3. The bicycle taillight fleet expression synchronous display system as claimed in claim 1, characterized in that: Also includes: Mode button; The control module is connected to the mode button, and the mode button is used to directly switch the taillight between mode one and mode two; wherein, when the mode button is short pressed, it displays that the current working mode of the taillight is mode one or mode two, and when it is long pressed, it realizes the switching between mode one and mode two; mode one is the normal mode, the taillight is turned on, and the dynamic reporting period is T1; mode two is the sentinel mode, the taillight is turned off, and the dynamic reporting period is T2, and T2 is less than T1.

4. A method for synchronizing expression of a team based on the synchronizing expression display system of a team of bicycle taillights according to any one of claims 1 to 4, characterized in that: include: The background sends the start time of the fleet synchronization to each device via 4G, in seconds; Based on the start time of the fleet's synchronous frequency, the time information obtained from the MEMA data and the precise time synchronization of 1PPS, determine which frame the LED expression content of the current bicycle taillight has been played to and the remaining time from this frame to the next frame; based on the number of frames that have been played and the remaining time from this frame to the next frame, update the displayed frame and frame time.

5. The method for synchronizing facial expressions of a fleet of vehicles as claimed in claim 4, characterized in that: Specifically include: Determine whether the 1PPS signal is received; If a 1PPS signal is received, it is determined whether there is MEMA data; If there is MEMA data, add 1 second to the time in the MEMA data as the precise time of the 1PPS. Determine whether the fleet synchronization time has arrived; If the fleet synchronization time is reached, the time difference between the start time and the current time is calculated, and the current playing frame and the remaining time from this frame to the next frame are calculated; Based on the number of frames that have been played and the remaining time from the current frame to the next frame, the displayed frame and frame time are updated and continuously monitored.

6. The method for synchronizing facial expressions of a fleet of vehicles as claimed in claim 4, characterized in that: Also includes: If the 1PPS signal is not received, the monitoring continues; If no MEMA data is received, monitoring continues; If the fleet synchronization time has not arrived, monitoring will continue.

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