Development Of Signal Acquisition And Processing System For AIT

Imaging logging is the development of new logging technology,it have large amount of information collected and high resolution.after processing,the measure signal will be put out as image in the form demonstrated. Compared with conventional logging technology, imaging logging have a stronger ability to adapt to the complex reservoirs.Array induction imaging Logging is one kind of imaging logging.it have a wide range of applications in Oil well logging.In the logging system,the logging signal will be send to DSP system through a series of signal preconditioning circuit.The DSP system is the core of the imaging logging system,it will get the signal to digital signal processing and transmission to the ground system for analysis.The main work of the paper is the design of array induction imaging logging signal pretreatment system and data acquisition and processing system.which signal preprocessing module achieve the function of the analog signal processing,it include signal preamplifier,Band-pass filter circuit, AGC circuit and differential buffer amplifier.This paper also focused on another array induction imaging logging tool data acquisition and processing system design, introduced a simple digital signal processing on the basis of some theory, the data acquisition and processing part of the design framework.Through a series of experiments testing the final circuit of the logging signal preconditioning was realized,and the paper also raise the method for the design of data acquisition and processing system.In the design of pretreatment circuit and data acquisition and processing system, all of elements we used are high temperature military precision chip and resistors. in the issues,all the basic knowledge involved on as measurement technology, control technology, communications technology and low-power anti-jamming technology have strong practical value of china's logging technology for detection equipment and the development of very real value.