Udp-based Network Of Auto Detection System Design And Realization

With the rapid development of the domestic economy, the numbers of the owners of vehicles are in the high-growth annually. The high-speed, efficient and accurate of the comprehensive performance test of the car is in good need. But the traditional data acquisition technology which using their mainframe and from the serial port to transmit data clearly can not meet the high-speed, precise control requirements. In order to facilitate the use of existing enterprise information network facilities in the network easily, various measurement and control equipment will be linked up. Therefore, the decision of using Ethernet and TCP/IP network technology of communications platforms comes up. The development of standards-based TCP transmission of data acquisition systems tallying with the industrial control network standards, the development technology of it is facilitate and mature, but in the actual vehicle inspection stations use, because the internal corporate network is open, it often be attacked by virus so the interference detection data often makes mistakes, In addition, the cost of TCP is very large so it is not conducive to the general SCM sampling of high-speed data transmission. This article based on the design of the automobile UDP network performance testing system.The main element of the development of the project is how to achieve an efficiency and intelligent vehicle Comprehensive Performance Test System under the network platform, which based on the domestic automobile automatic detection system. In this article we designed a data processing and transmission Embedded and Interfaced control unit under the UDP network. The module uses C8051F020 and RTL8019AS as the core. In the embedded interface control unit, all data obey the customized UDP to achieve reliable transmission and to enhance sampling speed. Using PC computing capabilities for data analysis and processing, which could overcome the general lack of functional MCU 8051. It could raise the speed of sampling while ensuring data accuracy. In addition, all the signals and interfaces in the comprehensive vehicle involved in the performance transformed into RTL8019AS and send as Ethernet data packet, which is both a return to the reunification of the TCP/IP packets. Those data-packets use UDP as a reliable transmission on the LAN to achieve detection equipment control in order to automatic alarm abnormal situation, thus achieving the Intelligent Vehicle Inspection System Management.This paper introduced to the use C8051F020, RTL8019AS, Ethernet and TCP/IP transmission protocol achieving UDP-based vehicle detection system network, with a focus on embedded control system hardware and software framework for the overall design, function, the work of Ethernet interface chip, the content of the embedded TCP / IP protocol stack, the program modules and data structures. Completely realize the reliable network communications based on the UDP transport protocol."Based on UDP network Vehicle Inspection System Design and Implementation" project put into use in early 2006 in Automobile Integrated Performance Measurement Station officially in the Wujin District of the city of ChangZhou. Now, it works stably and reliably in the LAN environment, and achieved the expected results. The use of this design system shows that the industry has good prospects of use. The system is open and it has high performance-to-price ratio, good versatility and good scalability. It not only provides a cost-effective method for vehicle detection system of automatic detection; But also for other industrial measurement and control system to provide a common set of practical and of ideas and methods. It has a certain practicality.