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In the paper, a simple motion controller based on LM628 is developed, aiming at the few axes medium-sized and minitype numerical control system. This controller achieves many functions, such as multi-axes linkage, beeline and circular arc interpolation, position and condition reporting, digital PID filter, special I/O and configurable I/O and so on. It can be used to numerical control machine tool...
Environment has big effect on the development of an organization. This essay disscuse the effect that external environment has on organization structures by focusing on two issues as total environment and real time environment. We try to find out the feasible method to handle the relationship between external environment and organization structures.
With the CAN/LIN network using in the Automobile Body Control System widely, in order to economically achieve the reliable communication in the vehicle, this article has designed a communication gateway based on ARM968E-S.This scheme introduces characteristics of ARM controller (LPC2919/01) and the CAN receiver (CTM1050T) in particular, achieved the software and hardware design of the CAN/LIN gateway...
Collision detection algorithm based on bounding box is an important algorithm of collision detection.The principle and effectiveness of axis-aligned bounding boxes(AABB)method, oriented bounding box method(OBB), discrete orientation polytopes (k-DOP)method were discussed in detail. The results of analysis prove that the simpleness of bounding box is in contradiction with the compactness of wrapped...
This paper presents a revised approach for estimating time-varying Origin-Destination flows in urban networks. This approach lend itself to a formulation as state-space model, and constructs an additional set of system observation constraints with estimated intersection turning flows to improve the system observability. Since there may exist errors in DTA or simulation models, this approach further...
An Unattended Detection method for monitoring the CO2 concentration in soil respiration is described. It is based on the gas pump and gas extraction with a dynamic air chamber assay, and the study of the relationship between data collected from on-line measurement of carbon dioxide and time, as well as the resistance to interfering. This method uses proposed utility line peak extraction method to...
In order to solve the problem of that the initial investment of truck dispatching system is vast and how to quantify scientifically to analyze the technical factor of truck dispatching system. A truck real-time dispatching model was built based on two minimization dispatch criterion. The method of "Comparing different index setting Simulations Used by the Same Shift (CSUSS)" was put forward...
This paper presents an intelligent video surveillance system. The system is composed of one or more nodes flexibly according to the application scenarios such as private properties, banks and museums. Each node is an autonomous vision-based device capable to perform intelligent tasks. It is able to digitize and compress the acquired analog video signals in MPEG-4 standard and then transmit the compressed...
The text posed a brand new counting method of using infrared which was distinct to the normal usage in the product line. By adopting the infrared lattice and the appropriate recognition algrithom, the MCU is able to detect the status of traffic flow in complicated circumstance, easily and economically. All this enables to improve the real time information of traffic condition, furthter to instruct...
In view of the large and high real-time data transmission in the current strapdown INS, USB interface was integrated into the strapdown INS, and a strapdown inertial navigation real-time data processing system composed of the DSP, FPGA and the USB interface was designed. The system composition and working principle were described; the overall hardware design and software design of the system were...
When facing the emergencies, to achieve the whole day real-time scanning services on targets, we propose a program with integration of visible and infrared imagers. A novel airborne low-altitude monitoring system is designed. it helps operators to detect targets accurately. Experiments show that the design is feasible and the system is practical, reliable, and easy to operate, displays Chinese characters,...
In this paper, taking mobile robot as the research object, the embedded control system is designed adopting PC/104 as host controller, which achieves the link among the expand boards, power module, motor driving module, perception modules, the HCI interface modules and so on; Wireless communication technology in mobile robots is investigated deeply, and then wireless remote control and wireless serial...
A basic network model N of local flow is a simple directed graph, in which transfer capacity and circulation capacity of a node in a local flow network are not detected and characterized. As a result, it is not in accord with various factual states and changes of the network commonly. An improved mathematical model NIO, called a node-separating model, was proposed in the presented paper. The NIO involves...
This paper is based on NDRC project "National Large and medium-sized agricultural products market informatization construction projects," developing the logistics process of real-time tracking management system for real-time Management of agricultural products in China. The real-time monitoring system of the logistics is designed with four subsystems: testing the temperature and humidity...
In view of the complexity and high cost of image processing system, the real-time image processing system based on SOPC (System-on-a-Programmable-Chip) is proposed in this paper. The embedded Nios II soft-core processor is used to collect and process the image and the algorithm which has the features of simplicity and great data quantity and parallelism is implemented by the hardware in FPGA. By this...
Researched on the characteristic of the traffic flow, a new method of abnormal data detection on traffic flow based on the curve-fitting is presented. First, the historical data on traffic flow are divided into the traffic flow with high speed and the traffic flow with low speed by the clustering analysis. Then, the algorithm on the determination safety zone scope is obtained by the curve-fitting...
This paper describes a method of digital audio public address (PA) system based on Ethernet. The main framework of the system is proposed and the core techniques are analyzed. The hardware design of network audio devices and software design are described in details in this paper. CYCLONE II EP2C5FA484 programmable FPGA chip and audio codec VS1003 are proposed in the network audio terminal design,...
A novel neural network, retina neural network (RNN) is put forward, and its definition, network structure, parameters, and characteristic are presented. After training it using a set of samples, an ideal training waveform is obtained, which is a great guide for future research. Moreover, a model of permanent magnet synchronous motor (PMSM) PI controller is constructed based on RNN to test drive performances...
The vehicle control system based on Network communication becomes increasingly complicated recently. The traditional research only focuses on the improvement of network communication quality or system control performance. The network configuration had been carried out to study the vehicle chassis integrated control system. Based on the MATLAB/Simulink and TrueTime Toolbox, the distributed CAN network...
According to the requirements of a DC motor speed control system, a Dual-Closed-Loop Speed Regulator has been designed, with the AT89C51 and TMS320LF2407A is the MCU of this regulator. The function of TMS320LF2407A is sampling and regulating the speed of the DC motor, and the function of AT89C51 is inputting and displaying the speed of the DC motor. The hardware block diagram, program charts, and...
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