CN202475841U - Automotive light driver being able to realize light diagnosis function - Google Patents

Abstract

The utility model discloses an automobile light driver capable of realizing the light diagnosis function, which comprises a signal processing circuit, a microcontroller, a light drive module and a CAN communication interface circuit; the light drive module and the CAN communication interface circuit are connected with the microcontroller Electrically connected, the CAN communication interface circuit is used to receive the signal sent by the CAN bus, and the received signal is processed by the signal processing circuit and then output to the microcontroller, and the control output terminal of the microcontroller is sent to the The lamps send corresponding driving signals to realize lighting control. The utility model is compact in structure, easy to implement, and can realize the function of lighting fault diagnosis. When there is a problem with the lamp, it can be quickly checked by the UDS diagnostic instrument, so as to find out the cause of the fault conveniently and quickly. (whether it is a short circuit or an open circuit), it is convenient and quick to troubleshoot.

Description

Automotive Lighting Driver Capable of Lighting Diagnostics

technical field

The utility model relates to an automobile light driver capable of realizing light diagnosis function.

Background technique

At present, the annual sales volume of automobiles in the world has reached more than 60 million, and the number of vehicles has exceeded 900 million. The more vehicles in use, the higher people's requirements for cars. Therefore, the safety, comfort, humanization and intelligence of automobiles are the urgent needs of people.

There is a certain failure rate in the long-term use of automobile lamps, which requires professional and technical personnel to maintain. In the process of maintenance, it is necessary to judge and analyze the fault, and find out the cause of the fault in order to eliminate the fault quickly and accurately. The timeliness of such maintenance is too low, and there is also a certain degree of misjudgment, which may cause artificial damage to some other components and cause unnecessary troubles.

Contents of the invention

In view of this, the purpose of the utility model is to provide an automobile light driver capable of realizing the light diagnosis function.

The purpose of this utility model is achieved by the following technical solutions:

The automobile light driver capable of realizing the light diagnosis function includes a signal processing circuit, a microcontroller, a light driving module and a CAN communication interface circuit;

Both the light driving module and the CAN communication interface circuit are electrically connected to the microcontroller, and the CAN communication interface circuit is used to receive the signal sent by the CAN bus, and output the received signal to the microcontroller after being processed by the signal processing circuit , the control output terminal of the micro-controller sends a corresponding driving signal to the lamp through the lamp driving module, so as to realize the lamp control.

Further, the car light driver also includes a power conversion module, which is used to convert the external vehicle power supply into a working power supply that meets the normal operation of other modules of the car light driver;

Further, the CAN communication circuit adopts a 1040AQ chip;

Further, the light driving circuit adopts BTS5020, BTS5180 or BTS5045 chips;

Further, the microcontroller circuit adopts PC9S12G48 single-chip microcomputer.

The beneficial effects of the utility model are:

The utility model is compact in structure, easy to implement, and can realize the function of lighting fault diagnosis. When a problem occurs in the lamp, it can be quickly checked by the UDS diagnostic instrument, so that the cause of the fault (short circuit or open circuit) can be found out conveniently and quickly, and it is convenient and fast to eliminate Fault.

Other advantages, objectives and features of the present utility model will be set forth in the following description to some extent, and to some extent, based on the investigation and research below, it will be obvious to those skilled in the art, or can be Get teaching from the practice of the utility model. The objectives and other advantages of the utility model can be realized and obtained by the following description and claims.

Description of drawings

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic diagram of module connection of the present invention.

Detailed ways

Preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the utility model, rather than limiting the protection scope of the utility model.

As shown in Figure 1, the automotive light driver capable of realizing the light diagnosis function of the present utility model includes a signal processing circuit 1, a microcontroller 2, a light driving module 3 and a CAN communication interface circuit 4;

Both the light driving module 3 and the CAN communication interface circuit 4 are electrically connected to the microcontroller 2, and the CAN communication interface circuit 4 is used to receive the signal sent by the CAN bus, and the received signal is processed by the signal processing circuit 1 and then output to the microcontroller The controller 2, the control output terminal of the microcontroller 2 sends a corresponding driving signal to the lamp through the light driving module 3, so as to realize the light control.

The utility model also includes a power conversion module 5, which is used to convert the external vehicle power supply to the working power supply for other modules of the car light driver, that is, to convert the 12V power supply provided by the car into the 5V working power supply required for system work.

In this embodiment, the CAN communication interface circuit adopts a circuit composed of 1040AQ chips, the light driving module adopts a circuit composed of BTS5020, BTS5180 or BTS5045 chips, and the microcontroller adopts PC9S12G48 single-chip microcomputer.

本实用新型可以实现以下控制功能：（下文中的BCM_LowBeamStatus、BCM_LowBeamStatus、BCM_HighBeamStatus、LCM_LeftHighBeamStatus、 LCM_RightHighBeamStatus、BCM_RearFoglampStatus、BCM_RearFoglampStatus、BCM_PositionLampStatus、LCM_LRearFoglampStatus、LCM_RRearFoglampStatus、LCM_LRPositionLampStatus、LCM_RRPositionLampStatus均为控制程序中的控制参数）

1) Low beam control function: When the ignition switch is in any position, the light controller receives the low beam turn-on signal from the BCM (body control module):

When BCM_LowBeamStatus=1, the light controller controls the left and right integrated lights of high and low beams to light up.

When BCM_LowBeamStatus=0 and BCM_HighBeamStatus=0, the light controller controls the left and right far and near integrated lights to turn off.

2) High beam control function: When the ignition switch is in any position, the light controller receives the high beam turn-on signal from BCM:

①When BCM_HighBeamStatus=1, the lighting controller controls the left and right high and low beam integrated lights to light up, and the left and right high beam auxiliary outputs low level.

When it is detected that the filament of the left high beam fails (including open circuit and short circuit), control the left high and low beam integrated lamp and the left high beam auxiliary lamp to turn off.

When the filament failure of the right high beam is detected (including open circuit and short circuit), control the right high and low beam integrated lamp and the right high beam auxiliary lamp to turn off.

②When BCM_HighBeamStatus=0, the light controller controls the left and right high beam auxiliary lights to turn off.

When BCM_LowBeamStatus=0 and BCM_HighBeamStatus=0, the light controller controls the left and right high and low beam integrated lights to turn off.

The light controller detects the working status of the left and right high beams, and sends the detection results to the bus.

Left high beam working status: LCM_LeftHighBeamStatus, 0: off, 1: on, 3: failure.

Right high beam working status: LCM_RightHighBeamStatus, 0: off, 1: on, 3: failure.

3) Rear fog light control: When the ignition switch is in any position, the light controller receives the rear fog light start signal from BCM:

When BCM_RearFoglampStatus=1, regardless of the state of BCM_PositionLampStatus, the light controller outputs PWM signal to control the lighting of the left/right rear fog, and the output power is 21W each.

When BCM_RearFoglampStatus=0 or BCM_RearFoglampStatus=3, the light controller controls the left/right rear fog to turn off.

The light controller detects the working status of the left and right rear fog lamps, and sends the detection results to the bus.

Working status of the left rear fog lamp: LCM_LRearFoglampStatus, 0: off, 1: on, 3: left fog lamp failure.

Right rear fog lamp working status: LCM_RRearFoglampStatus, 0: off, 1: on, 3: right fog lamp failure.

4) Rear position light control: When the ignition switch is in any position, the light controller receives the signal to turn on the position light from the BCM:

When BCM_PositionLampStatus=1, the light controller controls the left and right rear position lamps to light up, and at the same time outputs a PWM signal to drive the left and right rear fog lamps to light up. The power of the left and right rear fog lamps is about 5W (the specific value needs to be based on the requirements of the lamp to calibrate).

When any filament failure of the left rear position lamp is detected (including open circuit and short circuit), control the left rear fog lamp and the left rear position lamp to turn off.

When any filament failure of the right rear position lamp is detected (including open circuit and short circuit), control the right rear fog lamp and the right rear position lamp to turn off.

When BCM_PositionLampStatus=0, the light controller controls the left and right rear position lights to turn off, and at the same time controls the left/right rear fog lights to turn off.

The light controller detects the working status of the left and right rear position lights, and sends the detection results to the bus.

Working status of the left rear position lamp: LCM_LRPositionLampStatus, 0: off, 1: on, 3: any position lamp failure.

Working status of the right rear position lamp: LCM_RRPositionLampStatus, 0: off, 1: on, 3: any position lamp failure.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the spirit and scope of the technical solutions shall be covered by the claims of the present utility model.

Claims (6)

1. can realize the car bulb driver of light diagnostic function, it is characterized in that: said driver comprises signal processing circuit, microcontroller, light driver module and CAN communication interface circuit;

Said light driver module and CAN communication interface circuit all electrically connect with microcontroller; Said CAN communication interface circuit is used to receive the signal that the CAN bus is sent; And export microcontroller to after the signal that receives handled through signal processing circuit; The control output end of said microcontroller is sent the corresponding driving signal through the light driver module to light fixture, realizes light control.

2. the car bulb driver that can realize the light diagnostic function according to claim 1; It is characterized in that: said car bulb driver also comprises power transfer module, is used for converting the vehicle power supply of outside into satisfy other module operate as normal of car bulb driver working power.

3. the car bulb driver that can realize the light diagnostic function according to claim 1 and 2 is characterized in that: said CAN telecommunication circuit adopts the 1040AQ chip.

4. the car bulb driver that can realize the light diagnostic function according to claim 1 and 2 is characterized in that: light driving circuit adopts BTS5020, BTS5180 or BTS5045 chip.

5. the car bulb driver that can realize the light diagnostic function according to claim 1 and 2 is characterized in that: said microcontroller circuit adopts the PC9S12G48 single-chip microcomputer.

6. the car bulb driver that can realize the light diagnostic function according to claim 1 and 2, it is characterized in that: said signal processing circuit comprises Filtering Processing and amplifying circuit.

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