Research And Implementation Of High Speed Data Acquisition System For DTS Based On FPGA

At present, DTS technology has gradually developed and gradually penetrated into all fields, intensity of temperature demodulation. Solves all the disadvantages of this signal sensing for temperature measurement. This paper focuses on the research of data acquisition system in DTS system, lists the main problems in the collecting system for the performance of the DTS system, including data acquisition, data transmission and accumulation.This paper mainly researches on the above three problems, and design solutions to solve these problems.This paper introduced the measurement principle of DTS system,DTS system is the principle of temperature measurement by the temperature effect of scattered light. Temperature demodulation mode is adopted by the ratio of Stokes and anti Stokes signal acquisition signal. DTS acquisition system will collect two photoelectric signal conversion to digital quantity, and to accumulate, and processing the data sent to the host computer. Followed by a detailed analysis of the influence of key technology of acquisition system of DTS, the key technologies include synchronous acquisition technology, data accumulation, PCI data transmission; through DTS system indicators identified key parameters acquisition system, and the FPGA type. Then the specific problems to realize high-speed data synchronous data acquisition scheme, including synchronization acquisition scheme of determination,gathering and block diagram design, synchronous data acquisition circuit design and dual 100 MHz signal generation and ad design logic. After the design of FPGA data accumulated in FPGA programs, including the selection of memory through the analysis of the common disadvantages of the appropriate additive. The design scheme makes up for the common shortcomings of accumulating new technology, and design and Simulation of logic on the accumulated new scheme. The final selection of PCI data transmission technology of accumulated data transmission and transmission functions of PCI mainly includes transmission scheme design, PCI9054 peripheral circuit design, register and work mode configuration, PCI data transmission module of the logic design and simulation, as well as analysis of the PCI and PC transmission.Through the above three aspects of the design of the collection system, and verify its function. Finally, the system is verified by the data acquisition system.Through the research and implementation of the above three technologies, a synchronous acquisition can make the acquisition of two optical signal corresponds exactly, improve the measurement accuracy of the DTS system; data accumulation and PCI can in the shortest time to complete the cumulative transmission, improve the real-time of the DTS system. The research and implementation of this system can provide a reference for the DTS system to measure the temperature change faster.