CN108463023A - Matrix LED headlamp driver malfunction monitors system and monitoring method - Google Patents
Matrix LED headlamp driver malfunction monitors system and monitoring method Download PDFInfo
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- CN108463023A CN108463023A CN201710092128.9A CN201710092128A CN108463023A CN 108463023 A CN108463023 A CN 108463023A CN 201710092128 A CN201710092128 A CN 201710092128A CN 108463023 A CN108463023 A CN 108463023A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 26
- 239000011159 matrix material Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000007257 malfunction Effects 0.000 title claims abstract description 22
- 238000013024 troubleshooting Methods 0.000 claims description 13
- 210000003128 head Anatomy 0.000 claims description 12
- 230000006978 adaptation Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The invention discloses matrix LED headlamp driver malfunction monitoring system and monitoring methods, include control unit and execution unit in LED headlamps driver, control unit is by constant current loop control module, LED drive chip, MCU chip, CAN transceiver and LDO are constituted, constant current loop control module is used to power for LED drive chip, LDO is used to power for MCU chip and CAN transceiver, MCU chip is connect with LED drive chip by UART buses, execution unit is made of LED light source matrix, LED head lamp controllers are connected with image processor by SUB CAN bus, image processor is connect by CAN bus with vehicle body network.The present invention can be out of order in the monitoring in time less than 1 second, and take corresponding measure immediately, being reduced to minimum to external influence, to ensure that safety that whole system uses.
Description
Technical field
The present invention relates to a kind of Application of Monitoring System field of LED head lamp controllers more particularly to a kind of matrix LEDs
Headlamp driver malfunction monitors system and monitoring method.
Background technology
Have benefited from electronics technology to be seated the development speed that rocket up flies, for the considerations of driving active safety, it is tall and big on
Smart matrix ADB headlights (abbreviation ADB) come into being.Adaptive distance light auxiliary system (Adaptive Driving Beam,
Abbreviation ADB), while utmostly meeting driver, do not generate dazzling.Pass through the vision mould before being installed at shelves rearview mirror
Block detects front vehicles, in meeting and when with vehicle, controls the LED light on and off of different zones, constitute following vehicle profile change it is dark
Area avoids dazzling the eyes.Meanwhile most light maintains on road surface, and in addition to there is specific region existing for other vehicles, these regions
The peak use rate of night lights ensure that with this by light type dynamic shielding, effectively increase driving at night safety.
Some existing the relevant technologies are although solve some relevant realization devices of headlamp ADB systems and controlling party
Method, but propose that the fault handling method of perfect headlamp ADB systems is less, and also wherein the overwhelming majority is to be related to mechanically
ADB systems rather than matrix form ADB systems.Head lamp controller as the important component in whole system is more the absence of
Relevant malfunction monitoring and fault handling method.To ensure matrix LED headlamp reliability in use, it is necessary to it
Fault handling method carries out perfect.
Invention content
The present invention is directed to the deficiency of current car light detection device and detection technique, provides a kind of matrix LED headlamp
Driver malfunction monitors system and monitoring method, can be out of order in the monitoring in time less than 1 second, and take accordingly arrange immediately
It applies, being reduced to minimum to external influence, to ensure that safety that whole system uses.
In order to achieve the above objectives, technical scheme is as follows：
Matrix LED headlamp driver malfunction monitors system, include in the LED headlamps driver control unit and
Execution unit, described control unit is by constant current loop control module, LED drive chip, MCU chip, CAN transceiver and LDO structures
At the constant current loop control module is used to power for LED drive chip, and the LDO is used to be MCU chip and CAN transceiver
Power supply, the MCU chip are connect with LED drive chip by UART buses, and the execution unit is made of LED light source matrix,
The LED head lamp controllers are connected with image processor by SUB-CAN buses, and described image processor passes through CAN bus
It is connect with vehicle body network.
Preferably, the CAN transceiver model TJA1041A, the MCU chip model MC9S12G192, it is described
LED drive chip model TPS92661.
Matrix LED headlamp driver malfunction monitors the monitoring method of system, it is characterised in that：Include the following steps：
Step 1：LED headlamp drivers power on；
Step 2：MCU chip and each module are initialized；
Step 3：Controller operating voltage detects, if meets 9-16V, if not satisfied, system will be waited for persistently；
Step 4：CAN transceiver carries out the reception of CAN control messages；
Step 5：Image processor receives the dipped beam state of vehicle by vehicle body CAN and is handed down to by SUB-CAN
LED headlamp drivers, judge whether dipped beam is opened, if dipped beam is closed, close monitoring program, and return to step
Four；If dipped beam is in open state, judge whether adaptation function is in open state, if adaptation function is in opening state
State then opens monitoring program；Otherwise, monitoring program, return to step four are closed；
Step 6：Monitoring program judges that current LED headlamps driver whether there is failure, if there are failure, monitors journey
Sequence then first determines whether the failure is historical failure, if the failure is not historical failure, monitoring program identifies fault type
After record, respective handling is carried out, and after fault message is sent to image processor by SUB-CAN buses, return to step
Four；If the failure is historical failure, the troubleshooting that monitoring program does not repeat it, only by fault information reporting to figure
Opposite as processor, if failure is not present, monitoring program can judge to whether there is historical failure in historical failure library first,
If there are historical failure, the state removing historical failure and be restored to before troubleshooting；If historical failure is not present, control
The CAN that unit receives and parsing image processor is sent controls message and is calculated by algorithm, obtains the LED that needs control, and leads to
It crosses UART buses and control command is sent to execution unit；
Step 7：Control command is sent to the LED in execution unit by UART buses by the MCU chip in control unit
Driving chip, in meeting and when with vehicle, controls the LED light on and off of different zones, constitutes following vehicle to realize control to LED
The dark space that profile changes, avoids dazzling the eyes；
Step 8：Above-mentioned steps four are returned, whether normal continue monitor controller work.
Through the above technical solutions, beneficial effects of the present invention are：The effective object of matrix LED head lamp controller is
The high beam of vehicle, especially in high vehicle speeds and weaker ambient light, it is very important car lighting
System, it is therefore desirable to higher reliability.Under the premise of the present invention is the system reliably working for ensureing LED head lamp controllers,
LED headlamps driver malfunction or failure are found in time by monitoring, and then take different types of failure different processing
Failure is preferably minimized system and extraneous interference and damage by method.
Description of the drawings
Invention will be further explained below with reference to the drawings and examples..
Fig. 1 is that the matrix LED headlamp driver malfunction of the present invention monitors the structure diagram of system；
Fig. 2 is the main flow chart that the matrix LED headlamp driver malfunction of the present invention monitors the monitoring method of system；
Fig. 3 is the sub-process figure that the matrix LED headlamp driver malfunction of the present invention monitors the monitoring method of system.
Specific implementation mode
Invention is described in further detail presently in connection with attached drawing.These attached drawings are simplified schematic diagram, only to show
Meaning mode illustrates the basic structure of invention, therefore it only shows and invents related composition.
As shown in Figure 1, matrix LED headlamp driver malfunction provided by the invention monitors system, the LED headlamps
Include control unit and execution unit in driver, described control unit is by constant current loop control module, LED drive chip, MCU
Chip, CAN transceiver and LDO are constituted, and the constant current loop control module is used to power for LED drive chip, and the LDO is used
It powers in for MCU chip and CAN transceiver, the MCU chip is connect with LED drive chip by UART buses, the execution
Unit is made of LED light source matrix, and the LED head lamp controllers are connected with image processor by SUB-CAN buses, described
Image processor is connect by CAN bus with vehicle body network, the CAN transceiver model TJA1041A, the MCU chip type
Number be MC9S12G192, the LED drive chip model TPS92661.
As Figure 2-3, it is two to the flow of the monitoring method of the LED headlamps driver malfunction system in the present invention
Part, i.e. main flow and sub-process, wherein main flow is responsible for the operating of entire fault monitoring system, and it is determined whether to enable adaptive
Answer whether function, monitoring program should open, judge whether faulty generation, the failure are historical failure, and different
Troubleshooting measure；Sub-process is mainly responsible in the case where monitoring program is opened, monitor its operating voltage, LED temperature,
The short circuit of LED or open circuit failure and UART bus failures, when monitoring that failure takes corresponding troubleshooting measure immediately, and
It is reported to image processor by SUB-CAN buses.
The operation principle and the course of work of main flow and sub-process are described separately below.
Main flow：The LED headlamps driver can receive and parse the CAN control commands transmitted by image processor
Message, then the LED to be formed and be controlled required for corresponding dark space is calculated by algorithm, long-distance light is carried out accordingly to reach
The purpose of control.
Matrix LED headlamp driver malfunction monitors the monitoring method of system, it is characterised in that：Include the following steps：
Step 1：LED headlamp drivers power on；
Step 2：MCU chip and each module are initialized；
Step 3：Controller operating voltage detects, if meets 9-16V, if not satisfied, system will be waited for persistently；
Step 4：CAN transceiver carries out the reception of CAN control messages；
Step 5：Image processor receives the dipped beam state of vehicle by vehicle body CAN and is handed down to by SUB-CAN
LED headlamp drivers, judge whether dipped beam is opened, if dipped beam is closed, close monitoring program, and return to step
Four；If dipped beam is in open state, judge whether adaptation function is in open state, if adaptation function is in opening state
State then opens monitoring program；Otherwise, monitoring program, return to step four are closed；
Step 6：Monitoring program judges that current LED headlamps driver whether there is failure, if there are failure, monitors journey
Sequence then first determines whether the failure is historical failure, if the failure is not historical failure, monitoring program identifies fault type
After record, respective handling is carried out, and after fault message is sent to image processor by SUB-CAN buses, return to step
Four；If the failure is historical failure, the troubleshooting that monitoring program does not repeat it, only by fault information reporting to figure
Opposite as processor, if failure is not present, monitoring program can judge to whether there is historical failure in historical failure library first,
If there are historical failure, the state removing historical failure and be restored to before troubleshooting；If historical failure is not present, control
The CAN that unit receives and parsing image processor is sent controls message and is calculated by algorithm, obtains the LED that needs control, and leads to
It crosses UART buses and control command is sent to execution unit；
Step 7：Control command is sent to the LED in execution unit by UART buses by the MCU chip in control unit
Driving chip, in meeting and when with vehicle, controls the LED light on and off of different zones, constitutes following vehicle to realize control to LED
The dark space that profile changes, avoids dazzling the eyes；
Step 8：Above-mentioned steps four are returned, whether normal continue monitor controller work.
Sub-process：In the sub-process for having arrived malfunction monitoring involved in above-mentioned steps five, sub-process is mainly responsible in monitoring journey
In the case that sequence is opened, its operating voltage, LED temperature, the short circuit or open circuit failure of LED and UART bus failures are monitored, when
It monitors that failure takes corresponding troubleshooting measure immediately, and image processor is reported to by SUB-CAN buses.Sub-process
The step of：First, it is determined that whether monitoring program opens, if being not turned on, the step four in above-mentioned main flow is returned to, if monitoring
Program has turned on, then sequence judge the operating voltage of head lamp controller whether meet 9-16V, UART bus whether failure, LED
Whether excess temperature, LED whether short circuit or open circuit, if there are failure, monitoring program first determines whether the failure is historical failure,
If the failure is not historical failure, after monitoring program identifies fault type and record, corresponding troubleshooting is carried out, and will be former
After barrier information is sent to image processor by SUB-CAN buses, the step four in above-mentioned main flow is returned；If the failure is to go through
History failure, the troubleshooting that monitoring program does not repeat it then, only by fault information reporting to image processor.If not depositing
In failure, monitoring program can judge to whether there is historical failure in historical failure library first, if there are historical failure, removing is gone through
History failure and the state being restored to before troubleshooting；If historical failure is not present, control unit receives and parsing image procossing
The CAN that device is sent controls message and is calculated by algorithm, obtains the LED that needs control, is sent out control command by UART buses
Give execution unit；
The embodiment of malfunction monitoring：
The bus in head lamp controller, execution unit failure and control unit three are mainly monitored with reference to monitoring program
Partial fault condition is described in detail.
Bus failure monitors：What the monitoring of UART bus failures was realized by MCU chip, by using data on software
Check (CRC) can detect whether the data received and dispatched every time are correct, to ensure that by the way that CRC code is added in data transmit-receive
The accuracy and reliability of data transmission.
Execution unit malfunction monitoring：LED drive chip and LED lamp can be implemented to monitor, and LED is inquired by UART buses
The register of driving chip learns the state of LED drive chip and coupled LED lamp, and LED lamp includes just
Often, short circuit and open circuit；LED drive chip includes normal and failure.
Further, it is attached to the voltage value of the PTC thermistor in LED substrate by AD samplings, monitors and judge LED in real time
Matrix group whether excess temperature.
Control unit malfunction monitoring：Control unit is mainly made of MC9S12G192 chips and constant current loop control module,
By the real-time monitoring to head lamp controller operating voltage, the overvoltage of entire controller, the common event such as under-voltage can be monitored
Barrier, and take corresponding troubleshooting measure.
The failure mode and processing method of 1. matrix LED head lamp controller of table
For corresponding fault handling method used by the failure mode of LED head lamp controllers in the present invention：
When controller is there are when failure, after monitoring program monitors failure, can failure be classified and be recorded, inhomogeneity
The failure mode of type should use different processing methods, be shown in Table 1.
It is enlightenment with above-mentioned desirable embodiment according to the present invention, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to determine its technical scope according to right.
Claims (3)
1. matrix LED headlamp driver malfunction monitors system, which is characterized in that include in the LED headlamps driver
Control unit and execution unit, described control unit are received and dispatched by constant current loop control module, LED drive chip, MCU chip, CAN
Device and LDO are constituted, and the constant current loop control module is used to power for LED drive chip, the LDO be used for as MCU chip and
CAN transceiver is powered, and the MCU chip is connect with LED drive chip by UART buses, and the execution unit is by LED light source
Matrix is constituted, and the LED head lamp controllers are connected with image processor by SUB-CAN buses, and described image processor is logical
CAN bus is crossed to connect with vehicle body network.
2. matrix LED headlamp driver malfunction according to claim 1 monitors system, it is characterised in that：The CAN
Transceiver model TJA1041A, the MCU chip model MC9S12G192, the LED drive chip model
TPS92661。
3. matrix LED headlamp driver malfunction monitors the monitoring method of system, it is characterised in that：Include the following steps：
Step 1：LED headlamp drivers power on；
Step 2：MCU chip and each module are initialized；
Step 3：Controller operating voltage detects, if meets 9-16V, if not satisfied, system will be waited for persistently；
Step 4：CAN transceiver carries out the reception of CAN control messages；
Step 5：Before image processor receives the dipped beam state of vehicle by vehicle body CAN and is handed down to LED by SUB-CAN
Illuminator driver, judges whether dipped beam is opened, if dipped beam is closed, closes monitoring program, and return to step four；If
Dipped beam is in open state, judges whether adaptation function is beaten in open state if adaptation function is in open state
Open monitoring program；Otherwise, monitoring program, return to step four are closed；
Step 6：Monitoring program judges that current LED headlamps driver whether there is failure, if there are failure, monitoring program
First determine whether the failure is historical failure, if the failure is not historical failure, monitoring program identifies fault type and note
After record, respective handling is carried out, and after fault message is sent to image processor by SUB-CAN buses, return to step four；If
The failure be historical failure, the troubleshooting that monitoring program does not repeat it then, only by fault information reporting to image at
Device is managed, opposite, if failure is not present, monitoring program can judge to whether there is historical failure in historical failure library first, if depositing
In historical failure, then the state removing historical failure and be restored to before troubleshooting；If historical failure, control unit is not present
It receives and the CAN of parsing image processor transmission controls message and calculated by algorithm, obtain the LED that needs control, pass through
Control command is sent to execution unit by UART buses；
Step 7：Control command is sent to the drivings of the LED in execution unit by the MCU chip in control unit by UART buses
Chip, in meeting and when with vehicle, controls the LED light on and off of different zones, constitutes following vehicle profile to realize control to LED
The dark space of change avoids dazzling the eyes；
Step 8：Above-mentioned steps four are returned, whether normal continue monitor controller work.
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| CN201710092128.9A CN108463023B (en) | 2017-02-21 | 2017-02-21 | Matrix type LED headlamp driver fault monitoring system and monitoring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710092128.9A CN108463023B (en) | 2017-02-21 | 2017-02-21 | Matrix type LED headlamp driver fault monitoring system and monitoring method |
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| CN108463023B CN108463023B (en) | 2024-06-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110177411A (en) * | 2019-05-27 | 2019-08-27 | 常州星宇车灯股份有限公司 | Logo lamp control system, the vehicle with it and logo lamp control method |
| CN110187295A (en) * | 2019-05-27 | 2019-08-30 | 常州星宇车灯股份有限公司 | The fault monitoring method of the fault monitoring system of car light, vehicle and car light |
| CN110290614A (en) * | 2019-05-27 | 2019-09-27 | 常州星宇车灯股份有限公司 | Intelligent vehicle beacon light control system, vehicle and control method with it |
| CN112415422A (en) * | 2019-08-21 | 2021-02-26 | 常州星宇车灯股份有限公司 | Fault monitoring and processing system and method for dynamic steering lamp and vehicle |
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| CN108463023B (en) | 2024-06-25 |
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