Research And Implementation Of High-speed Data Acquisition System Based On FPGA

With the rapid development of electronics and science and technology,there is a stronger demand for high-speed,high-precision,and high-accuracy acquisition systems.Various chip manufacturers continue to introduce new ADC chips to provide technical support for the realization of high-speed data acquisition systems.Field Programmable Gate Array(FPGA)is rich in logic resources,has small internal delay,and has a fast operating cycle.It is widely used in data acquisition,image processing and other fields.Based on the research of the principle of high-speed ADC chip,this paper combines the powerful FPGA chip to complete the design of high-speed data acquisition system,which can be used for the acquisition of shock pulse ground penetrating radar echo signals.The main research content of this system is divided into the following parts:Analyze the basic principles of the data acquisition system and the basic characteristics of the collected radar signals,and determine the real-time sampling method to ensure the real-time and accuracy of the collected information.The hardware design of the high-speed data acquisition system with the analog-digital conversion module,the system control core and the data transmission module as the main body is carried out.The hardware design mainly includes the interface circuit design of the FPGA main controller and analog-to-digital conversion chip,frequency control chip and data transmission chip,and completes the circuit schematic drawing according to the functions of each component.Analyze the high-speed data sampling chip ADC12D1600 timing logic,and use FPGA hardware language to complete the system clock logic design,signal type conversion logic design and multi-level down-speed buffer data logic design.And do corresponding simulation to verify the correctness of the logic design of different modules.Compare the input signal waveform with the recovered data waveform of the high-speed acquisition system to detect the performance of the high-speed data acquisition system.This system can accurately restore the signal of the shock pulse ground penetrating radar,and has certain practical application value in the fields of geological exploration and underground safety.