Research And Implementation Of Computerized Logging Coded Signal Processing System

The thesis is about to research Computerized Logging Coded Signal Processing System. To make a comprehensive analysis of the types of downhole instruments echo signal and the characteristics of data communication. Designing a set of Computerized Logging Coded Signal Processing System based on embedded ARM for pulse and coding signal form research.The paper introduces the current technical situation of Computerized Logging Coded Signal Processing System, and the analysis of the composition of numerical control system, determine a set of feasible project.Computerized Logging Coded Signal Processing System has micro controller LPC2294 as the core with the embedded real-time operating system μCVOS-Ⅱ, Realized reasonable division of the coded signal modulation、depth and coding signal conversion and CAN communication and the LCD hardware function modules, which organically combined with four corresponding software task module, realized the Computerized Logging Coded Signal Processing functions, then meet the requirements of production logging for coding logging signal processing,which improved the real-time signal processing system and the data transmission effectively.At the end, the article has made the physical form of Computerized Logging Coded Signal Processing System, using the cable simulator and multi-arm caliper logging tool and related sensors, completed the depth signal measurement、coding signal decoding and data display and CAN communication.The system has realized the depth of the pulse signal and coding signal acquisition and decoding processing according to the debugging results.