Steering lamp safety control system

Abstract

The utility model belongs to the technical field of vehicle lamp control, and particularly relates to a steering lamp safety control system which comprises a Vbat module, a steering signal module, a Boost-Buck module, an SBC module, an MCU module, an LED-Driver module and a steering lamp LED. The Boost-Buck module and the SBC module are both electrically connected with the Vbat module; the SBC module is electrically connected with the MCU module; the Boost-Buck module and the LED-Driver module are electrically connected with each other; the LED-Driver module is electrically connected with the steering lamp LED; the steering signal module is in communication connection with the MCU module; the Boost-Buck module is in communication connection with the MCU module; the SBC module is in communication connection with the MCU module; the LED-Driver module is in communication connection with the MCU module; and the SBC module is in hard wire connection with the MCU module.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle light control, and in particular relates to a turn signal light safety control system. Background Art

[0002] Turn signals are one of the main devices that indicate the dynamic information of a vehicle. They are important indicator lights that alert vehicles and pedestrians in front, behind, to the left and to the right of the vehicle when the vehicle is turning. They are installed at the front and rear ends and sides of the vehicle body. They are turned on by the driver before or when the vehicle turns, so that people around the vehicle can know the direction of the vehicle in advance and make correct judgments, thus ensuring driving safety.

[0003] In the prior art, the design of the turn signal controller does not take into account the safety state of the turn signal function as flashing. The existing safety design considers the safety state of the turn signal function as the turn signal off. In the event of failure of electronic, electrical or software related functions, other vehicles on the road cannot be alerted, which may lead to collision and rear-end accidents. Utility Model Content

[0004] The purpose of the utility model is to provide a turn signal safety control system to solve the technical problem that the turn signal function safety state in the prior art is that the turn signal is off, and when the electronic, electrical or software related functions fail, it cannot alert other vehicles on the road. In order to solve the above problem, the utility model provides a turn signal safety control system, which can flash and light up when the electronic, electrical or software related functions fail, to alert other vehicles and improve the safety performance of the vehicle.

[0005] The utility model provides a turn signal safety control system, comprising:

[0006] Vbat module, turn signal module, Boost-Buck module, SBC module, MCU module, LED-Driver module and turn signal LED;

[0007] The Boost-Buck module and the SBC module are both electrically connected to the Vbat module; the SBC module is electrically connected to the MCU module; the Boost-Buck module is electrically connected to the LED-Driver module; the LED-Driver module is electrically connected to the turn signal LED;

[0008] The turn signal module is connected to the MCU module in communication; the Boost-Buck module is connected to the MCU module in communication; the SBC module is connected to the MCU module in communication; the LED-Driver module is connected to the MCU module in communication;

[0009] The SBC module is hard-wired to the MCU module.

[0010] In the turn signal safety control system of the utility model, an output fault line of the SBC module is added and output to the LED-Driver module. When the MCU module fails, the SBC module can output a 1.25Hz, 50% square wave as a turn signal to the LED-Driver module to light up the turn signal LED. The turn signal can be lit when electronic, electrical or software-related functions fail, to alert other vehicles and improve the safety performance of the vehicle.

[0011] Furthermore, the SBC module includes: a fault safety module, a fault output module, a module for monitoring MCU hardware faults and a module for monitoring MCU software faults. The SBC module monitors the software and hardware faults of the MCU module by monitoring the MCU hardware fault module and the MCU software fault module. When the SBC module detects software or hardware faults of the MCU module, it outputs a reset signal to the MCU module through the fault output module.

[0012] Further, when the MCU module invalidates the software or hardware fault through a reset signal, the SBC module outputs a 1.25 Hz 50% hard-line signal to the LED-Driver module, and the LED-Driver module enters a limp mode.

[0013] Furthermore, the LED-Driver module lights up the turn signal LED according to the hard-line signal, and the turn signal LED flashes and lights up.

[0014] Furthermore, the LED-Driver module includes a PWM frequency modulation pin, the SBC module outputs a 1.25Hz 50% hard-line signal and sends it to the PWM frequency modulation pin of the LED-Driver module, and the power supply of the LED-Driver module outputs a power signal according to the duty cycle of the PWM frequency modulation pin, so that the turn signal LED flashes and lights up.

[0015] Furthermore, the MCU module includes: an internal fault feedback module, a software protection module and a communication protection module.

[0016] Furthermore, the Boost-Buck module includes: a first buck-boost module, a first communication timeout module and a first limp-home module, and the first buck-boost module communicates via SPI.

[0017] Furthermore, the LED-Driver module includes a second buck-boost module, a second communication timeout module and a second limp-home module, and the second buck-boost module communicates via SPI.

[0018] Furthermore, when the Boost-Buck module is powered on and initialized, a first limp-home module is configured to independently output power when the MCU module fails.

[0019] Furthermore, when the LED-Driver module is powered on and initialized, a second limp-home module is configured to light up the turn signal LED according to the power output of the PWM frequency modulation pin of the LED-Driver module when the MCU module fails.

[0020] The beneficial effects of the utility model are:

[0021] The turn signal safety control system of the utility model adds a safety design of the turn signal to the original system. The superior domain control does not need to add redundant signal lines for the turn signal. The requirement of turning on the functional safety turn signal can be met even when there is an internal failure or communication with the domain control is lost, thereby improving the safety of the vehicle.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the turn signal safety control system of the utility model;

[0025] Figure 2 It is a schematic diagram of the execution of each module of the turn signal safety control system of the present utility model.

[0026] In the figure:

[0027] 1. Vbat module; 2. Turn signal module; 3. Boost-Buck module; 4. SBC module; 5. MCU module; 6. LED-Driver module; 7. Turn signal LED. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1 As shown, it is the best embodiment of the utility model, a turn signal safety control system, comprising:

[0030] Vbat module 1, turn signal module 2, Boost-Buck module 3, SBC module 4, MCU module 5, LED-Driver module 6 and turn signal LED 7;

[0031] The Boost-Buck module 3 and the SBC module 4 are both electrically connected to the Vbat module 1; the SBC module 4 is electrically connected to the MCU module 5; the Boost-Buck module 3 is electrically connected to the LED-Driver module 6; the LED-Driver module 6 is electrically connected to the turn signal LED 7;

[0032] The turn signal module 2 is connected to the MCU module 5 for communication; the Boost-Buck module 3 is connected to the MCU module 5 for communication; the SBC module 4 is connected to the MCU module 5 for communication; the LED-Driver module 6 is connected to the MCU module 5 for communication;

[0033] The SBC module 4 is hard-wired to the MCU module 5 .

[0034] like Figure 1 As shown, Vbat module 1 and turn signal module 2 are provided by the upper domain controller, and the upper domain controller outputs signals. Vbat module 1 supplies power to Boost-Buck module 3 and SBC module 4, Boost-Buck module 3 supplies power to LED-Driver module 6, SBC module 4 supplies power to MCU module 5, Boost-Buck module 3, SBC module 4, turn signal module 2 and LED-Driver module 6 can all communicate with MCU module 5, and SBC module 4 and LED-Driver module 6 are connected via hard signal lines.

[0035] The SBC module 4 includes: a fault safety module, a fault output module, a module for monitoring MCU hardware faults, and a module for monitoring MCU software faults. The SBC module 4 monitors the software and hardware faults of the MCU module 5 through the MCU hardware fault monitoring module and the MCU software fault monitoring module. When the SBC module 4 detects a software or hardware fault of the MCU module 5, it outputs a reset signal to the MCU module 5 through the fault output module. The FCCU pin of the module for monitoring MCU hardware faults is connected to the FCCU pin of the MCU. When a hardware fault occurs inside the MCU, the FCCU pin of the MCU module 5 will be pulled down. When the SBC module 4 detects this signal, it will send a reset signal to reset the MCU. The SBC module 4 monitors the software program flow fault of the MCU module 5 by integrating an external watchdog. The main chip model used by the SBC module 4 is the FS23XX series.

[0036] When the MCU module 5 invalidates the software or hardware fault through a reset signal, the fault output pin of the SBC module 4 outputs a 1.25 Hz 50% hard-line signal to the LED-Driver module 6, and the LED-Driver module 6 enters the limp mode.

[0037] The LED-Driver module 6 lights up the turn signal LED 7 according to the hard-wire signal, and the turn signal LED 7 flashes and lights up.

[0038] The LED-Driver module 6 includes a PWM frequency modulation pin. The SBC module 4 outputs a 1.25Hz 50% hard-wire signal to the PWM frequency modulation pin of the LED-Driver module 6. The power supply of the LED-Driver module 6 outputs a power signal according to the duty cycle of the PWM frequency modulation pin, so that the turn signal LED 7 flashes and lights up.

[0039] The MCU module 5 includes: an internal fault feedback module, a software protection module and a communication protection module. The main chip of the MCU module 5 is the S32K3XX series.

[0040] The Boost-Buck module 3 uses a buck-boost chip with SPI communication, including: a first buck-boost module, a first communication timeout module and a first limp-home module. The first buck-boost module communicates via SPI. When the Boost-Buck module 3 is powered on and initialized, the first limp-home module is configured to independently output power when the MCU module 5 fails. The main chip of the Boost-Buck module 3 is the TPS92XXX series.

[0041] The LED-Driver module 6 includes a second buck-boost module, a second communication timeout module and a second limp-home module. The second buck-boost module communicates via SPI. When the LED-Driver module 6 is powered on and initialized, the second limp-home module is configured. When the communication with the MCU module 5 is normal, the turn signal LED 7 flashes and lights up according to the communication content. When the communication with the MCU module 5 is lost, the LED-Driver module 6 flashes and lights up according to the 1.25Hz 50% pulse signal on the PWM frequency modulation foot. The main chip of the LED-Driver module 6 is the TPS92XXX series.

[0042] Working principle:

[0043] like Figure 2 As shown, it is divided into normal working condition and Fail-safe working condition.

[0044] Normal working condition: Vbat module 1 supplies power to SBC module 4 and Boost-Buck module 3 respectively, SBC module 4 outputs 5V to supply power to MCU module 5, when MCU module 5 receives the signal from turn signal module 2 and needs to light up turn signal LED 7, MCU module 5 outputs square wave signal through SPI to make turn signal LED 7 module flash and light up.

[0045] Fail-safe mode: When the MCU module 5 has a software failure (software stuck, running away, stack overflow, etc.) and cannot feed the SBC module 4 within the window, the SBC module 4 pulls down the RESET pin to reset the MCU module 5. When TBD software failures are accumulated, the SBC module 4 identifies it as a serious failure and enters the SBC fail-safe mode. The fault output pin outputs a 1.25Hz 50% square wave to the LED-Driver module 6. The LED-Driver module 6 receives this signal and flashes.

[0046] When a hardware fault occurs in the MCU module 5, the MCU module 5 is identified by the internal fault management unit and fed back to the SBC module 4 through the FCCU pin. The SBC module 4 resets the MCU module 5 or enters the fail-safe mode, and the fault output pin outputs a 1.25Hz 50% square wave to the LED-Driver module 6, which receives this hard-line signal and flashes.

[0047] At the same time, due to a failure in MCU module 5 (software / hardware), the upper-level domain controller lost communication with the local light controller, identified a failure inside the local light controller, and sent a command to turn on the turn signal to the normal light controller on the other side, keeping the turn signals on both sides lit to avoid misleading drivers and passengers on the road.

[0048] The turn signal safety control system of the utility model adds an output fault line of the SBC module and outputs it to the LED-Driver module. When the MCU module fails, the SBC module can output a 1.25Hz, 50% square wave as a turn signal to the LED-Driver module to light up the turn signal LED. The turn signal can be lit when electronic, electrical or software related functions fail, to alert other vehicles and improve the safety performance of the vehicle.

[0049] The various devices selected in the present invention are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0050] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0051] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0052] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A turn signal safety control system, characterized in that: include: Vbat module (1), turn signal module (2), Boost-Buck module (3), SBC module (4), MCU module (5), LED-Driver module (6) and turn signal LED (7); The Boost-Buck module (3) and the SBC module (4) are both electrically connected to the Vbat module (1); the SBC module (4) is electrically connected to the MCU module (5); the Boost-Buck module (3) is electrically connected to the LED-Driver module (6); the LED-Driver module (6) is electrically connected to the turn signal LED (7); The turn signal module (2) is connected in communication with the MCU module (5); the Boost-Buck module (3) is connected in communication with the MCU module (5); the SBC module (4) is connected in communication with the MCU module (5); and the LED-Driver module (6) is connected in communication with the MCU module (5); The SBC module (4) is hard-wired to the MCU module (5).

2. The turn signal safety control system according to claim 1, characterized in that: The SBC module (4) comprises: a fault safety module, a fault output module, a module for monitoring MCU hardware faults and a module for monitoring MCU software faults. The SBC module (4) monitors the software and hardware faults of the MCU module (5) via the module for monitoring MCU hardware faults and the module for monitoring MCU software faults. When the SBC module (4) detects a software or hardware fault of the MCU module (5), a reset signal is output to the MCU module (5) via the fault output module.

3. The turn signal safety control system according to claim 2, characterized in that: When the MCU module (5) invalidates the software or hardware fault through a reset signal, the SBC module (4) outputs a 1.25 Hz 50% hard-line signal to the LED-Driver module (6), and the LED-Driver module (6) enters a limp mode.

4. The turn signal safety control system according to claim 3, characterized in that: The LED-Driver module (6) lights up the turn signal LED (7) according to the hard-wire signal, and the turn signal LED (7) flashes and lights up.

5. The turn signal safety control system according to claim 4, characterized in that: The LED-Driver module (6) comprises a PWM frequency modulation pin, the SBC module (4) outputs a 1.25 Hz 50% hard-wire signal and sends it to the PWM frequency modulation pin of the LED-Driver module (6), and the power supply of the LED-Driver module (6) outputs a power supply signal according to the duty cycle of the PWM frequency modulation pin, so that the turn signal LED (7) flashes and lights up.

6. The turn signal safety control system according to claim 5, characterized in that: The MCU module (5) comprises: an internal fault feedback module, a software protection module and a communication protection module.

7. The turn signal safety control system according to claim 6, characterized in that: The Boost-Buck module (3) comprises: a first boost-boost module, a first communication timeout module and a first limp-home module, wherein the first boost-boost module communicates via SPI.

8. The turn signal safety control system according to claim 7, characterized in that: The LED-Driver module (6) comprises a second buck-boost module, a second communication timeout module and a second limp-home module, and the second buck-boost module communicates via SPI.

9. The turn signal safety control system according to claim 8, characterized in that: When the Boost-Buck module (3) is powered on and initialized, a first limp-home module is configured to independently output power when the MCU module (5) fails.

10. The turn signal safety control system according to claim 9, characterized in that: When the LED-Driver module (6) is powered on and initialized, a second limp-home module is configured to light up the turn signal LED (7) according to the power output of the PWM frequency modulation pin of the LED-Driver module (6) when the MCU module (5) fails.

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