Papers by Keyword: SOPC

Abstract: This design elaborates thedevelopment process of the custom IP core AD9280 controller based on FPGA. Thedesign uses FPGA as the core of the microcontroller, realizes the function ofAD controller by adopting the hardware description language,Verilog HDL and encapsulates it to the custom IP core in the SOPCBuilder. In the NIOS II, the application program interface (API) function ofthe AD controller software is used to access and control the hardware, thesoftware is written by using C language. The experimental results show thatthis custom IP core is feasible and flexible, fully reflects the advantages ofSOPC technology.

Abstract: As for the severe situation of mine water hazard in our country, it is extremely urgent to find ways of preventing and managing mine water hazard. This paper proposes a design of system which adopts fluorescence detecting technology and uses SOPC as the core control module, it can quickly detect the changes of mine water hazard source.This system collects signal of fluorescence produced in laser irradiation of water, and turns it into electric signal which is later be collected by ADC and then sends the digital data into FPGA for storing and managing. SOPC is designed in QuartusIIsoftware, and program code is designed in NiosIIsoftware, which will finally be downloaded into FPGA. A test of data collecting, handling and storing is carried out in the lab to verify the feasibility of the system. The results show that the system can efficiently detect the changes of mine water hazard source.

Abstract: This article presents a program for permanent magnet synchronous motor (PMSM) vector control chip design based on SOPC technology. Microprocessor NIOSII and hardware arithmetic unit such as CORDIC and SVPWM, were all integrated in a FPGA by using bus interconnect and IP reuse technology, so that became a dedicated control chip of PMSM. Using hardware and software co-design methods, the chip was designed on Altera's CycloneIII FPGA, chip design flexibility and use small resource. Finally, combined with the power driver board achieved the dual closed-loop control of PMSM. The results show that system have a good performance, which proved that system can be well controlled by the designed IC.

Abstract: Deformation measurement is an important content of engineering surveying and the main objects of the deformation measurement are civilians, industrial buildings, precision engineering, large dam, bridge and the earth's crust deformation of rock mass. Deformation measurement aims to obtain the deformation data in the process of displacement deformation, and to get the deformation of the status, trend and possible results through the analysis of these data. The existing automatable solution for measuring the deformation all adopt the 3-dimension displacement test, which based on high precision total station, unattended, automatic data acquisition and transmission control mode.

Abstract: Signal processing circuits are proposed for the electric field type time grating sensors. The proposed design scheme integrates sampling function and processing function into a signal field programmable gate array (FPGA) based on system on programmable chip (SOPC) technology. Employing NiosII technology and adding self-defined instructions improve data processing speed for time grating sensors. The proposed signal processing circuits are simple and stabile. The proposed signal processing circuits are applied to electric field type linear time grating sensors, the experiments results that the peak-to peak measuring error is 0.3um within 200mm without any corrections.

Abstract: This thesis proposes a design of digital stepper motor control system, with FPGA as control core, communicates with LabVIEW host computer system via RS232 serial port. The host computer control system is programmed in LabVIEW, and can be used to choose working mode, rotation direction, run or stop, steps and angles for rotation. The slave computer system takes EP2C8Q208C8N chip of Altera Corporation’s Cyclone II series as the core, to construct the hardware environment of the system. And it could driver stepper motor correspondingly according to the received commands that sent by host computer. This design provides a new idea for development and application of embedded system, and has a certain reference value for the development of new product.

Abstract: The ship-borne antenna uses two-axis stabilized platform to isolate the posture changes of ship and mechanical shock to stabilize the direction of antenna, its working principle is to compensate for the disturbance motion in the opposite direction, which involves a lot of knowledge in the field. This paper proposed using System-on-a-Programmable-Chip (SOPC) to realize algorithmic control and Kalman signal integration of ship-borne two-axis gyro stabilized platform; It not only described the requirements of ship-bone stabilized platform and the advantages of Xilinx FPGA chips designed for motion controllers, but also gave the algorithm principle of the control system, flow chart, the mathematical model and the SOPC system structure diagram; During the design of ship-bone antenna stabilized platform based on SOPC, this paper used MEMS micro mechanical gyroscope to complete test and achieve a certain degree of accuracy, which has greatly reduced the development cost.

Abstract: Projection-camera interaction is a human-computer interaction technology which uses projector-camera as input-output devices, and combined with human movement as interactive mode. Introducting radial distortion and tangential distortion of lens to projection-geometric calibrate the camera system, the platform is used the Xilinx main processor Virtex-4 FX experimental box to building a projection-camera interactive implementation platform, and used the Baum-Welch algorithm which based on hidden Markov model for training gesture.

Abstract: This paper analyzes the instantaneous value of the three-phase circuit measurements of various parameters and the key issues to be addressed , to design a new type of intelligent SOPC based on a permanent magnet vacuum circuit breaker control system. FPGA-based NIOS II as the main processor , the more traditional micro-controller with a higher data processing speed and strong expansion capability to effectively meet the electricity system fast data processing capability and high real-time requirements . And with a powerful FPGA logic functions to achieve internal switch control section and the hardware of the control program , than the direct control of the processor using software implemented with higher reliability and noise immunity . The intelligent control system hardware to EP2C35F672C6 core processor,mainly for failure to protect the real-time data acquisition and processing and circuit breakers,real-time display of current or fault line running information, the intelligent controller to achieve two-way communication with the PC function , via the bus system to reach remote remote adjustment, the purpose of the remote control , making the performance of intelligent controller is enhanced to meet the requirements of the distribution system , which provides protection for the safe operation of power system reliability .

Abstract: SOPC becomes popular nowadays, which combines software and hardware in a single chip. In this paper, a multi-axis motion controller is implemented based on a SOPC system with a NIOSII processor in a single FPGA chip. The motion controller includes DDA module, spindle module and NURBS calculation module realized in Verilog HDL. DDA algorithm is used to drive the motors while spindle module is to drive the spindle. Because of NURBS recursive nature, NURBS calculation module is used to accelerate the calculation which takes the advantage of parallel structure. The NIOSII processor realizes the feedrate scheduling, in which constant feedrate is adopted. The second-order interpolation algorithm is used to control the feedrate.