The Application Of CAN In Imaging Logging System

Digital Signal Processing is a new subject, the signal will reached to people's request when it were processed by digital signal processing. Digital Filter sampled and enhanced the useful signal and decreased the useless one. It can be realized by two ways: the special hardware or software .It was very easy and flexible if the digital signal processing was realized by written program in PC. Software digital filter was adopted in this system.CAN is a kind of fieldbus and a serial communication network which supports distributed and real-time control effectively. The CAN have a lot of advantages, such as the high communication rate, high reliability , and convenience. The reliability and real-time performance will be improved , and the structure is very simple , convenient to maintain, and is easy to be expanded if CAN used in the imaging logging system.According to the analysis of the development trend and the reliability of the imaging logging system, a based on the Digital Signal Processing (DSP) and Controller Area Network (CAN) fieldbus technology is advanced. The selection of the project, the realization of the hardware & software, the reliability and the anti-disturbance of this system were researched.The sampling and processing of signal from the cable is realized in this system; These data will be transferred to the PC with CAN adapter by the CAN fieldbus communication system, and will be imaged after analysis, the node received the command from the PC and controlled the field equipment. The sampling of the DSP real- time data and CAN fieldbus control were researched and realized in this paper, the realization of the CAN fieldbus by DSP was especially researched. And the program was written by C.