The Research Of Based On Sopc Correlation Method Ultrasonic Anemometer

With economic development, the energy problem has attracted widespreadattention.In the wind power generating, Measurement of wind veloeity and directionplays a very important role. As a kind of wind speed measuring instruments, Theultrasonic anemometer has got a lot of attention in recent years. In this paper, the corecomponent of this ultrasonic anemometers is32-bit Nios II soft core. It is flexible andpowerful. The designer can build a SOPC according to their needs. Firstly, This paperanalyzes the method of ultrasonic velocity measurements, include doppler、 timedifferene and relevant method, and in-depth researches the relevant method to measurewind speed and direction. The overall design is completed based on the SOPCultrasonic wind measurement system. It includes front-end acquisition circuit design,the SOPC hardware architecture, the software design, and the display module design.In the front-end and the peripheral circuitdesign, the design includes a drive signalgeneration, data acquisition and control circuit, and a peripheral circuit of the FPGA. Onthe basis of conventional DDS technology, a sine wave signal generate based on theDDS of CORDIC Algorithm. The data acquisition circuit includes an amplifying circuit,AD conversion, FIFO. A peripheral circuit of the FPGA circuit includes power circuit, aclock circuit, debugging circuitry, configuration circuitry, communication circuitry, anda display module.Altera EP2C8Q208is used in the subject, we select the device to build the project,to complete the SOPC system of the hardware architecture. The system includes theSDRAM controller, the EPCS controller, timer controller, PIO controller, JTAG_UARTcontroller and UART controller. User components for the system is designed ADC andDAC. ADC is used for the analog to digital conversion, DAC is used for the digital toanalog in ultrasonic driver signal. The components of the overall link generated SOPCsystem. After Hardware generated, we begin Software development in EDS. Eachsub-module is tested online. The measured data is analyzed to verify the reliability ofthe sub-module. After the completion of the system design, field testing, completed theacquisition of the ultrasonic signal to verify the reliability of the whole system. At the end,we get a summary of the system design, and give the system improvetnents.