FPGA-Based Acoustic Logging Signal Acquisition Circuit Design

In this paper, a hardware design scheme based on field programmable gate array (FPGA) and analog-to-digital converter TPAFE5160 is proposed for the demand of high precision and high efficiency of acoustic signal acquisition in acoustic logging instruments. The design is based on the flexible programmability and parallel processing capability of FPGA, combined with the FSMC interface to accurately control the TPAFE5160, and realize the optimization of parameter configuration, data acquisition and transmission. As a high-performance analog-to-digital converter chip, the TPAFE5160 supports a sampling rate of 250kSPS under the drive of FPGA, which can satisfy the requirements of acoustic well logging on the speed and accuracy of signal acquisition. The FPGA program design ensures the stability and data integrity of the sampling process through FSMC interface configuration optimization, state machine control logic and data caching mechanism. After actual testing and verification, the acoustic signal acquisition circuit designed based on FPGA and TPAFE5160 is able to acquire acoustic signals stably and accurately at a sampling rate of 250kSPS, with high reliability and practicality. This design provides effective technical support for the performance improvement of acoustic logging instruments, which is expected to be widely used in the fields of geological exploration and oil extraction. At the same time, the method and idea of FPGA program design in this design can also provide reference for other similar signal acquisition system design.