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RMU (Ring Main Unit) is small footprint, easy to use, but difficult to measure multiple analog signals, in response to these characteristics, this paper proposes a design of intelligent distribution ring main unit FTU (Feeder Terminal Unit) based on DSP. The system uses slot-type structure to carry on modular design, using CPLD for signal dispatching, it can measure up to 120 analog signals, digital...
A tourism team is usually built up by tourists from different areas with different backgrounds and lifestyles, so that how to manage a tourism team has become a hot topic of current research. In order to solute this problem, we have designed a management system based on radio frequency identification technology which composes by tag reader and tans. The tag reader is carried by guider and the tags...
Individual cylinder's spark advance is crucial to the performance, efficiency and emissions of a multi-cylinder spark ignition engine. Through controlling knock strength of each cylinder, spark advance is regulated to an appropriate ignition angle which can cause light knock strength and high efficiency. This paper uses techniques of ASIC, programmable logic and DSC which has a CAN controller to detect...
Computer technology has developed rapidly, the same time it brings more opportunities for information theft, tamper and destruction. Information security has become a research focus. The security of operating system, as the base of information system, is particularly important. With the developing of 40 years, the security operating system has made certain achievements. However, it still exist some...
Illumination Recorder based on MSP430 MCU consists of hardware and software. The embedded processor MSP430F149, ferroelectric memory FM31256, high-gain amplifier OP777 and silicon LED 2DU6 complete of data collection and storage; five buttons and LCD graphic displays the completion of parameter setting, mode conversion and the date and time adjustment and display; using CH375B chip completes of communication...
Software defined radio (SDR) is one of the important technologies for the modern wireless communication system. By moving radio functionality into software that has previously been implemented in hardware, SDR changes wireless communication system to great extend. This paper gives a detailed state of the concept of SDR, and then analyzes some key aspects of designing SDR, such as tools for software...
Intelligent spot dosing device was developed against wax condition during oil development process, and this phenomenon affected oil well regular production severely. P89LPC938 is the core of the device. It displays the liquid level and temperature, so decide whether the adding the paraffin removal agent or not. This device realized automatic dose, reduced drain on manpower and material resources,...
This paper introduces an open source code embedded real-time operation system μC/OS-II and then analyzes its characters and structure. On the basis of introduction of the development of microcomputer protection device, the paper proposes the project which is μC/OS-II applied in microcomputer protection device, and also analyzes the development process which is real-time operation system μC/OS-II applied...
Based on the programmable gain amplifier chip PGA309's Coarse Offset and zero Adjustment function, a set of algorithms is designed in this paper to implement the measurement system program-controlled hardware zero adjustment without having to manually adjust the multiturn potentionmeters or program-controlled adjust the digital potentionmeters, thus avoiding all kinds of shortcomings which exists...
Efficient design and implementation of an Fast Fourier Transform (FFT) processor is one of the most important problems for signal processing, signal transmission, networking and security (key enabling technologies supporting electrical and control engineering applications). The problems of design and implementation of complex numbers FFT processor based on the field programmable gate array (FPGA)...
As the wide application of ARINC429 bus on avionics equipments, slow communication speed of current boards becomes a serious problem. This paper introduced an ARINC429 communication board based on MCU control and CPLD I/O expansion. Hardware environment of this board consists of eight receive channels, four transmit channels, and both USB and RS485 interfaces. This board achieves compatibility between...
This paper mainly focuses on the design and realization of embedded control system based on ARM kernel. Firstly, hardware structure, configuration and signal detection, processing of the control system based on ARM are described. Secondly, the system application programs, including main control program, user operation interface program, keyboard program and development of drivers for some S3C2410X...
TWI (Two-wire Serial Interface) bus is simple but powerful and flexible. It supports master and slave operation. The system is based on TWI, with a couple of ATmega32 as masters and a LPC2478 chip as a slave to achieve communication among nine different MCU, which greatly increase the efficiency of LPC2478 and the whole system. The communication nodes in the system can be dynamically added or removed...
The static stability feature of missile airframe due to varied parameter, The characteristics and benefit of applying relaxed static stability technology on missile flight performance were analyzed. The technologies transforming time-domain and frequency-domain mixed performance indexes into desired poles, as well as state feedback into output feedback were derived respectively. In view of different...
The shop-level information integrated system is the glue of system integration between enterprise upper management systems and the underlying process control systems, the basic of executing enterprises' agile manufacture strategy. The field management and shop information integration are given more and more attention by enterprises, the methods and technologies of traditional shop management can't...
This paper discusses the composition and function of an advanced controller system of Car Black Box. The system can not only record the main driving data of the car comprehensively and accurately in real-time, but also reconstruct the accident with data process software, which can help people analyze the accident rapidly and legitimately after a collision. A review of recent researches on Car Black...
Based on high speed micro turn-milling complex machine tool and machining characteristic of micro parts, the reconfigurable theory and other related technologies are discussed in this dissertation to implement integrity machining and enhance machining efficiency. The general function analysis of micro turn-milling complex machining tool is done and it is the research foundation of universe technologies...
ARINC 429 is a widely used bus standard in signal transmission of aeronautical electronic devices on civil aircraft. According to the analysis of ARINC 429 bus protocol and parameter characteristics, the thesis designs and implements synchronous and real-time simulation of multi-channel's 429 signals, coming from subsystems of a certain type of airplane. On the basis of simulation result, the author...
In this paper, Universal Serial Bus 2.0 (USB2.0) host stack has been analyzed, and special emphasis on USB2.0 Driver (USBD2.0) and Host Controller Driver (HCD) in USB2.0 protocol stack is presented. At last, a particular implementation principle of U disk driver based on VxWorks real time operating system, attachment of driver and simulation of block device initialization with CY7C67300 as its Host...
This paper presents a modified pipeline single-path delay feedback (SDF) fast Fourier transform (FFT) architecture. The canonic signed digit (CSD) representation is used to design the function of complex multiplier, which is the main function block in the FFT processor. The processor of a 16-bit 16-point pipeline FFT is realized on the Xilinx Virtex-4 FPGAs. The achieved maximum clock frequency is...
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