Based On The Design Of The Gps / Gprs Vehicle Image Monitoring Terminal

With the rapid development of the embedded-applications and wireless network technology, the embedded vehicle monitoring system which combines the GPS location technology and GPRS wireless communication technology comes into being. Its main function is transmitting the location of the vehicle, time, status, and other real-time information through the wireless network to the remote monitoring center. By this way, the center can locate and track the target vehicle promptly.In recent years, more and more crimes take place in autos frequently, which bring us a lot of troubles, such as overload for the long distance car, the taxi driver's safe and the private car guard against theft. Therefore, a monitoring system which could not only take a picture but also send this picture to the monitoring center is evoked. In order to meet the requirement, the paper introduces USB video capture technology into embedded vehicle monitoring terminal and puts forward a new solution based on ARM-Linux platform.Firstly, the paper describes the GPS technology, GPRS wireless network technology, USB interface technology and Linux device driver technology in detail.Secondly, the paper explains how to carry out the hardware and software design. In the hardware design, as S3C2410X is used as the main processor, it makes much simple to design the interface among the Processor, GPS module, GPRS module, USB video modules, and voice module. In this part, Details are presented about the selection and characteristics of the processor, the orientation module, the communication module and the USB camera. Especially, expound the interface structure and data output format. In the software design, at first, the paper transplants the Linux operating system which supports the USB Host and I2S, as well as the YAFFS file system. Afterwards the paper introduces the software design flow of the image acquisition module, GPS information collection module, and GPRS data transmission module. In order to reduce the quantity of data transmitted by the GPRS network, JPEG compression technology was used to compress static image in the image acquisition module, which could economize the network resources and speed up the image transmission.Finally, the paper summaries all the works and gives the methods for further improvement.The embedded vehicle image monitoring terminal which uses GPS/GPRS technology could collect the GPS and picture information about the automobile and send it to the monitoring center. Making use of the information, monitoring center strengthens its supervision ability to track automobile, it could safeguards the Human body and the property safety. The design makes full use of resources on ARM S3C2410X processor and implements vehicle monitoring functions at a low-cost but more conveniently.