The Design And Research Of Automatic Steering Of The Car Headlamp

Since the car came, car co-existence with humans, as an excellent means oftransport and means of transportation, more and more people of all ages and soughtafter. But people for the pursuit of the car is no longer simply let the car mobile lightfor the car at night, slowly revealed, the headlight auto-steering system (AFS) It is inthis context, and slowly developed into a more mature system. It is not only toachieve the general lighting of the car more effectively expand the range of lighting,increase the safety of traveling by car at night. This article describes the headlampautomatic steering system just for the people the potential demand for car use andthe headlights were made some improvements, some additional institutions to enablethem to achieve the automatic steering device, and ultimately develop a set ofembedded Linux Qt/Embedded graphical interface in order to achieve the controland follow-up development of humanity. The main content of this paper include: adetailed understanding of the vehicle structure and performance, and the AFStechnology for a comprehensive understanding, compare the principle of the AFStechnology, these systems and derive. By several current popular embeddedprocessors, embedded operating system, the GUI graphics support system strengthsand weaknesses of the discussion, combined with the equipment features selected toARM9S3C2410-based hardware platform as the core, the2.4.18kernel Linux andQt-based software platform. System hardware development platform for the analysisintroduced on S3C2410processor and the external interface unit, about theirstructure and function, and select the sensors and motors for the system, and theirselection in order to comply with this system requirements. Amount of sensor outputsignal processing, and design of the circuit is converted to the amount of signal thatwe can handle, and the signal input to an MCU for processing the output to the drive motor work, we expect the automatic steering operation. The main work of thispaper is divided into the following five large pieces of content: First, the signalacquisition stage is the installation of sensors and sensor signal output stage. Havesome knowledge of the car first, to know the basic body structure and vehicle invarious states of the process of moving. To understand the various types of sensors,and were adapted to what occasion, what time. Then the choice of sensor, takingfully into account various factors, and try to do our best to carry out the installationof the sensor, the sensor output to a certain treatment can be. Secondly, a certainunderstanding of the MCU to introduce the embedded knowledge of relatedconcepts, and the MCU selection. Since our CPU can only handle digital signals andoutput digital signal corresponding analog to digital conversion and digital-to-analogconversion process should be carried out, so the input to the CPU before the CPUoutput. The introduction of digital to analog converters, analog to digital convertercomes with8-channel ADC analog to digital conversion, in the chosen MCUselection to the DAC. Again, build the basis of embedded systems introduction,handling, and processing of the CPU on the input signal and output signal. Call ourpre-programmed in our embedded devices, the program processing the input signal,the comparison operator, the corresponding output. Then, the stepper motor driver toobtain a signal from the output of the DAC, the conversion for the correspondingangular displacement of the corresponding rotation to drive a stepper motor in orderto achieve the headlamps automatically turn the operation. Finally, Samsung isbased on the ARM920T core32-bit RISC embedded processor S3C2410hardwareplatform and embedded Linux operating system, select the Qt/Embedded as agraphical user interface tools to develop a set of beautiful, efficient, touch theman-machine interface it has good portability, simple operation, and secondarydevelopment features very easily. This paper describes the structure and principlesof automotive automatic lighting system, increase the signal detection unit and anelectric mechanism in the interior of the vehicle headlamps automatically turn theheadlamp according to traveling at night the special situation of the road, at any timeautomatically adjust the direction of the illumination beam to reduce the blind spotappears, so that the driver can find the obstacles and pedestrians, reduce accidents,thereby increasing the active safety of night driving.