Advanced Materials Research Vols. 694-697

Abstract: This study presents a design of an advanced embedded remote monitoring system based on the current computer network technology.This monitoring system carries out a data acquisition process by an embedded field monitor uploads the environmental information and alarm massages to a monitoring center computer and completes the data processing and data storage. The field monitor used in the monitoring system is composed of a data acquisition card and a network transmission card. This monitoring system with low cost simple equipments has practical accuracy that is suitable for unmanned machine room, base station, intelligent community and living house.

Abstract: Multiple faults detection has great significance in practice. A dynamic reconfiguration SoC (System on Chip) system based on FPGA (Field Programmable Gate Array) is designed to realize multiple faults detection and reduce the detection time. Also, a framework of software platform and a case study for demonstrating and validating the SoC dynamic reconfiguration system are proposed.

Abstract: U-boot is an open source project under the protocol of GPL, which has been widely used as boot application on embedded system. Normally, U-boot initializes hardware and send to hardware information to the embedded OS. In mobile thermals, especially in the arm-based mobile device, U-boot has played an important role. U-boot supports many kinds of development boards. However it does not support every board, so it needs to be modified to fit other board. This paper analyses the boot procedure and the source code of U-boot, studies how to add a custom command on U-boot source, analyses the protocol of USB, then gives us a new way to download the binary U-boot file or the kernel directly to RAM and run. In this way, we do not need to burn the binary U-boot file or the kernel to Flash. This has save a lot of time in embedded system development.

Abstract: The thesis mainly proposed the design of a reliable online-programming IP core for MV10, a SOC, which is an 8-bit MCU integrated with PWM, ADC, CAN and other function modules. In this thesis the online-programming IP core can write BIN file into the on-chip SRAM for program debugging with high accuracy-communication and error self-detection. The IP core embedded in MV10 has passed the silicon verification with Global Foundry 0.35um mix-signal library. The online-programming IP core proposed in this thesis can also be used in other SOCs.

Abstract: Kalman filter is one of the most effective methods to recover the signal influenced by noise. Kalman filter algorithm is implemented by the MicroBlaze embedded in SoC (System on Chip) system. A software platform for validating the algorithm is proposed and a case study is given to illustrate its application.

Abstract: For the traditional PLC compatibility and poor scalability problems, this article developed a soft PLC running and simulation system. The system compatible with Mitsubishi FX2N series PLC instruction set. RTX was used to serve as the real-time kernel, ensured the real-time performance of the control, introduced the using method of RTX timer, multithreading and shared memory, emphasized the decoding function realization, also developed a soft PLC simulation system. Finally, through an example program verify the correctness of the running and simulation system.

Abstract: Specific to the problems of current loader weighing device, for example, lack of accuracy and poor real-time processing ability, this paper designed a new type loader electronic scale and introduced μC/OS-II operating system into this system. Besides, GPRS communication module is added and the digital sensor is installed. At the same time, CAN bus is applied to carry out information transmission, which effectively improves the accuracy, real-time processing ability and anti-interference ability of loader electronic scales.

Abstract: This paper presents a digital compass based on the chip LSM303DLH. This set of equipment has many advantages- smaller size, fewer cost, better display and friendlier user interface. The design of the hardware in the system consists of battery charging circuit based on TP4056, data acquisition circuit based on 3-axis accelerometer and 3-axis magnetometer LSM303DLH, OLED display circuit and master control circuit based on high speed MCU C8051F321. The software contains circuit control code, data fusion code and the upper computer software. In addition, the software code mainly depends on C language and C++. Finally, it accomplishes a kind of digital compass which can be powered by battery and uploads the data to the computer.

Abstract: Based on the data display of instrument for the current electric vehicle is imperfect, this paper puts forward designing a generic electronic instrument of electric vehicle with speed, mileage and power data display function. The microcontroller of AT89C52 is the core of system design. The design uses Hall sensor as a speed detection sensor to realize the mileage/speed measurement display of electric vehicle. It uses the 24C02 saving the mileage information in case of power-down system, uses LED module in real-time displaying the speed, mileage and power, and provides the alarm function of hypervelocity. The design of the system is in real time, running well in the test, may be promoted to the electric vehicles research and development industry.

Abstract: A vehicle control unit (VCU) of electric car integrated with GPRS/GPS and CAN bus was proposed for vehicle driving status monitoring and performance evaluation. The vehicle powertrain information, including parameters of electric motor and battery package as well as their fault messages, and driver operations were collected by VCU and sent to the monitoring center by GPRS. To ensure the wireless transmission reliable and flexible, VCU hardware was designed using MC9S12XET256 and GPRS/GPS module, and the wireless transmission protocol was developed with data message. Laboratory experiment and road test results verified that the GPRS transfer accuracy could reach close to 100% at 5 kb/s. The driving performance of testing vehicle was analyzed, which showed that VCU could follow the drivers operation and the driving range exceeded 120km and energy consumption reduced by 12.7% owing to regenerative braking.