The Design of Data Transmission for New Intelligent Layered Water Injection Regulating and Testing System

This article mainly presents the method of carrying out Manchester’s coding, transmitting and surface decoding for the downhole data based on complex programming language device EPM1270T144I5 chip (CPLD). It also presents the main components of new intelligent layered water injection regulating and testing system, the overall scheme design on data transmission, and the software simulation in QuartusⅡ for ManchesterⅡ encoding as well decoding. The actual application shows that the technology features stable and reliable for data transmission and acceptance, thus it is greatly simplifying the system’s circuit, improving its whole performance.