Design And Implementation Data Acquisition And Image Transmission Based On CAN

In the information age today,information collection and transmission technologies are very important,and image information is the most intuitive way for people to obtain information.The application of image acquisition and transmission system is very extensive,and it is indispensable in various fields such as industrial and agricultural production,national defense,transportation,medicine and astronomy.With the rapid development of science and technology,batches of new electronic devices continue to emerge,and the requirements for the performance of image acquisition and transmission systems have increased.The design method of the image acquisition system is endless.Among them,the image acquisition and transmission system based on the STM32 series microprocessor based on the ARM core is not only simple to implement,but also has low cost,high efficiency,and good performance.It is used as an image acquisition and transmission function.Ideal choice.The network structure of the CAN bus in the car,with different requirements,the design of each subnet in the CAN bus is different.The high quality of CAN bus technology allows many companies to save costs while also increasing the quality and benefits of the product.Moreover,since the image information needs to occupy a very large storage space,this brings great inconvenience to the computer for various image processing operations and storage operations as well as the image itself in the communication system,so the image segmentation technology and image enhancement The method is still a hot issue that is closely watched by the society today.There are three main image segmentation algorithms: threshold segmentation method,edge detection,and region-based segmentation method.The JPEG standard used is the mainstream standard used in the current static image compression.The principle of JPEG is to eliminate some unnecessary data that is insensitive to the human visual system so as to achieve the purpose of compression.In the processing of photos,JPEG can play a huge role.For the above research based on single-chip image acquisition,processing,and transmission systems,it can effectively achieve low data volume image acquisition and transmission,and at the same time expand the application field,improve the practicality of the image transmission system,and make its related wireless communication application system more mature.This article takes the research of the vehicle-mounted monitoring system as the background,based on the CAN bus as the technical support,completes the information acquisition,and prepares to realize its hardware.First,analyze and discuss the image acquisition and transmission system in combination with domestic and international development.On this basis,carefully analyze the characteristics and requirements of the vehicle-mounted monitoring equipment to select the appropriate hardware equipment,use the STM32 as the main controller,OV2640 camera set image acquisition and compression as a whole,directly output JPEG pictures,and the transmission is stable,The SIM900 A module with low power consumption completes data transmission.In image transmission,it is applied to GPRS technology,ie,general packet radio service technology.This belongs to the category of mobile data services and can be handled or used by GSM mobile phone users.It can meet the functional requirements of sending images on the premise of saving costs..Then on the basis of already having the hardware entity,allocate the corresponding function for each module,then use the program code to drive the hardware work according to the overall design flow chart.Finally,after completing the above work,we simulated the protocol using software.The experimental results show that the design of the system is very reasonable and can achieve all aspects of the system's functions well.Moreover,the hardware system has stable performance and reliable software operation.The agreement we should make is reasonably available.