Research Of Data Acquisition System Based On FPGA

With the development of computer technology and sensor technology, data acquisition technology develops toward high-speed, high-performance, easy operation direction. In national production, military, aerospace and other fields play a more and more important role. Data acquisition technology has attracted more and more attention.Currently, temperature acquisition system uses single chip microcomputer as control platform, its hardware resources and performance are limited, it needs to extend peripheral circuits, design becomes complicated. This topic in order to effectively collect the indoor temperature, combines with the features of FPGA, selectes the FPGA chip of Altera company EP1C3T144C8 as a control core, the one-wire digital temperature sensor DS18B20 as a temperature acquisition device. The four channel temperature through acquisition, transmission and display, do hardware, software, and interface design, to complete a full set of temperature acquisition system.The part of hardware uses Altium Designer 10.0 to design the hardware circuit of the system, and complete the PCB layout design. The part of software uses Quartus II as software development platform, programming uses Verilog hardware description language to design, completing the real-time temperature acquisition, transmission, display. The simulation module through its own simulation software. The development of host computer uses Visual Basic 6.0 as development platform, various channels real-time temperature are displayed and beyond the range of temperature make the alarm, realize the historical temperature information query and curve shows.Modular design makes the whole design process very convenient for debugging and verification of each module, thus greatly reducing the design time and improving efficiency. Finally, through the system simulation and debugging, the data acquisition system can collect indoor temperature accurately and effectively. It has the advantages of low cost, high accuracy, strong expansibility, good user operation, and achieves desired design goals.