Design And Research On Data Acquisition And Transmission System Of Pipeline Robot

At present a variety of pipeline transport has become a kind of economic and security transportation for liquid, gas and other petroleum products. It is widely used in oil and gas transportation industry. To ensure the safe operation of pipelines, it is often need to be detected. The detection of magnetic flux leakage internal inspection of piping is commonly used as an effective way. The magnetic flux leakage pipeline robot is a device used to achieve the collection and record of data. Among them, the data acquisition is one of key technologies in pipeline robot system, which can not only collect all kinds of information, but also store this information for analysis later. This paper is aim at the pipeline robot for the design and research of data acquisition and transmission parts, and present the design scheme, and realize through the A/D converter to complete the established accuracy of the data acquisition and large-capacity storage. The bus data transfer based on USB between the PC and analysis software is completed. It is very important for the pipeline robot to work.Firstly, this paper bright out the composition and working mechanism of the pipeline robot, analyzes the structure characteristics of the pipeline robot, construct a pipeline robot data acquisition and transmission system based on USB. System design includes two parts, which is hardware and software. The ATMEL's microcontroller C8051F320 is selected as core microcontroller in the hardware of the system. The circuit design includes data acquisition circuit, the data storage circuit, USB communications interface circuits, JTAG debug interface circuit, reset circuit, the circuit of system power supply and circuit board of system. The detailed working principle and circuit operation is shown. Then, the data collection and transmission system for main program, acquisition program, FLASH memory program, USB device-side communication program and system firmware program are designed in the Keil C51 development environment. USB host-side communication program and PC applications are completed by object-oriented programming language VC++. The human-computer interaction analysis interface is designed to achieve the transmission of data collection and graphical display and analysis capabilities. The flow chart of the various parts of the software programs and implementation steps are shown in paper.Finally, the rationality of the system for hardware and software features of data collection and transmission are tested. In the interface of data acquisition and transmission for signals, the display and analysis of acquisition data are achieved. The simulation results show that the system can complete the function of magnetic flux leakage data collection and transmission based on USB. The system is stabilization. Because of the C8051F320 microcontroller with build-in USB controller and the 10bit 200Ksps of the A/D converter to achieve high-speed data acquisition, and companies with SAMSUNG 128MB of Flash memory K9F1G08U0A as the external memory, the high detection rate and mass storage and other characteristics of the pipeline robot are realized better.