Research And Design Of The Electromagnetic Flow Imaging System Transceiver Circuit

May happen in the application of the traditional technology in oil and gas drilling always collect a lot of water and a small percentage of oil and gas.This is because the well is usually consists of a variety of fluid,As the changes of the time,each phase fluid position is in the constantly changing.Electromagnetic flow imaging technology based on the nonlinear and can't predict the future direction of the system,Using tomographic imaging technology to solve measurement problem of multiphase flow,which will guide the exploration of oil and accurate production,improve the production efficiency of resource.In the well under high temperature,high pressure and high noise environment,To the volume of oil well logging instrument with high performance requirements,so it is very important to study for multiphase flow imaging instrument.This design from theory to practical circuit scheme applied research.Completed the electromagnetic imaging measurement circuit of hardware and software design.The transmission circuit with Direct Digital Synthesizer as the core technology,the signal collection circuit is to use STM32F407 controller for receiving signals more cycle interval data,such as the back-end using the phase sensitive detection algorithm of real time data processing and upload.Measurement results show that in the indoor environment of multiphase flow electromagnetic imaging transmitting and receiving circuit achieves system design requirements,which made contribution for the practical application of underground instrument.