Yanjun Fang

ZigBee Based Wireless Sensor Networks and Its Applications in Industrial

Based on the study of the characteristics of ZigBee technology, and the analysis of the structure of wireless sensor networks. Proposed a new reliable, flexible and inexpensive WSN system based on the ZigBee technology. Its structure that the MAC layer and the network layer of ZigBee been taken over wholly is given, and its node that integrates the WSN nodes and ZigBee module together, include both the hardware implementation and the software implementation based on TinyOS, is designed. At the end, analyzed the desired characteristics of the WSN system applied in industrial and proved that the new WSN system has a more vast range of prospects in the application in industrial.

PROFIBUS-DP and HART Protocol Conversion and the Gateway Development

PROFIBUS-DP and HART are two widely used fieldbuses, but the incompatible between them paralyzes their applications in the plants. Based on the analysis of the protocol models of the two ISO/OSI model based fieldbuses, and the study of the network structures and communication machines of the two fieldbuses. The method to resolve the incompatibility between heterogeneous fieldbuses is discussed, and an integrated approach based on gateway for the interoperation between PROFIBUS-DP and HART is proposed. The implementation, which includes hardware design and software design, is presented. The detailed SPC3 based PROFIBUS-DP interface and HT2012 based HART interface are described. And a state machine, on which the software implementation is based, is given. The test results have shown its high real-time performance and reliability.

Ant Colony System Algorithm for Path Routing of Urban Traffic Vehicles

This paper adopts an ant colony system (ACS) algorithm to develop the current urban traffic vehicles path routing methods. Aiming at a goal path that both the distance and the time cost are involved into the goal function, the algorithm developed a path routing process based on an inspired heuristics searching that the next times path searching are inducted by the effective paths last times found. Through some times search, the search would be converged at the best path that deposited most pheromone. This paper analyzed the characters of the urban traffic path routing, described the searching process based on the ACS method, and presented the results that using this algorithm in a simplified urban traffic model. And based on the analysis of the computational results, this paper got a series of algorithm parameters that make the search accurate and converged quickly.

Development of Multifunctional Controller Based on PROFIBUS-DP

The decentralized structure of the control system is effective and reliable. Aiming at a flexible and whole decentralized Fieldbus control system, this paper analyzed the characters and the typical structure of PROFIBUS-DP control system and its limitation. And a new approach of the control system based on multifunctional controller is proposed. Based on the analysis of the nodes of PROFIBUS-DP networks, the structure of the controller, with the components of PROFIBUS-DP interface, controller I/O interface and CPU three parts, is given. The hardware implementations of the controller, both the whole structure and the detail interfaces, and the software structure and detail control strategy machines are designed respectively. At the end, an integrated system based on the multifunctional controller is described, and the experiments show a good performance of the controller.

Implementation of Industrial Ethernet Communication Based on Embedded Systems

There is a strong interest of using cheap and simple Ethernet technology for industrial network. However, traditional way uses a microcontroller (such as Rabbit 2000) in 8 bit mode, which cannot meet the demands of industrial communication. In order to realize communication over industrial Ethernet in 32 bit mode, this paper describes a method using S3C4510B 32 bit RISC microprocessor and uClinux embedded OS to realize industrial communication. The hardware of network interface and software development under uClinux was also present. The application result shows that the application has low cost but well performance in industrial field

Design of automated control system based on improved E.Coli foraging optimization algorithm

In industry process, though facing the difficulty of modeling, the historical accumulated object datum has not been made best use of. In this paper, a novel identification solution based on the improved E.Coli foraging algorithm (IEFOA) was proposed. IEFOA is presented with three main operators, which include a tumbling operator, a swimming operator and a tracing operator that at the same time records the optimal position of individual E.Coli in order to update the locations of swarm. Furthermore, the systemic method for the design of automatic system integrated with the IEFOA was proposed. The total design procedure of control system includes two procedures. First, the model of the controlled object was estimated using the IEFOA based on the experiment data. Then the IEFOA was proposed to design the optimal parameters of controller. The simulation results show that the IEFOA plays an important role in the controlled object modeling and parameter optimal design of controller and IEFOA offers a new method for the whole control system design.

Use of Ethernet for Industrial Control Networks

There are strong interests of using cheap and simple Ethernet technology for industrial control networks. However, traditional Ethernet is shared network using CSMA/CD protocol, which cannot ensure data determination and real-time reliability. Given the measured total delay distribution, this paper analyses the types of real-time data transmitted in industrial control networks and illustrate a hypothetical probability density function to describe the total delay in data delivery. Finally, the point of paper is put forward on devising an efficient method to estimate the delay probability of flows, especially those with multiple competing

Weighted Fuzzy Rule-Based System Combined With A Novel Simplified E.Coli Foraging Optimization Algorithm

A simplified E.Coli foraging optimization algorithm is presented in this paper, which simulates the chemo-tactic behavior of E.Coli. The optimization algorithm characterizes the easy implementation and the fact that no gradient information is required. The operators of the algorithm are described in details. The simplified E.Coli algorithm consists of a tumbling operator and a swimming operator. At the same time the optimal position of individual E.Coli and the location of all E.Coli swarm are adopted to update the locations of swarm. In this paper, a weighted fuzzy rule-based system has been designed, in which the parameters of membership functions including position and shape of the fuzzy rule set and weights of rules are estimated using the simplified E.Coli foraging optimization algorithm. The efficiency of the system has been illustrated in the process of classifying the iris data. This paper also shows that weighted fuzzy rules can lead to better fuzzy system compared with non-weighted fuzzy rules.

Development of an Embedded Industrial Vision System

A kind of remote vision system based on embedded technology was designed, which can transmit the picture data on Ethernet, being free from the distance restrict, needless repeated wiring and not easily be interfered by other parts of computer system. The software and hardware design of vision system consisting of CMOS image sensors, ARM microprocessor and embedded OS are introduced. Modularizations of hardware compatible to the standard I2C bus, detailed instruction of embedded processor and image sensor, and realization of application programs are emphasized. Further, this paper focused on discussing the design of hardware part including high-speed ARM S3C4510B processor, image sensor module and image buffering control module. Driver of uClinux, image collecting, image compressing, network communication program are also analyzed. Finally, it used electronic design automatic software to simulate two system processes in order to verify the design. A testing board is built and fundamental experiments are operated, which indicate that this design has great performance in industrial application

Parameter estimation of cutting tool temperature nonlinear model using a novel simplified E. Coli foraging optimization algorithm

In cutting tool temperature experiment, a large number of related data could be available. In order to define the relationship among the experiment data, the nonlinear regressive curve of cutting tool temperature must be constructed based on the data. In this paper, a simplified E. Coli foraging optimization algorithm is proposed with three main operators, which include a tumbling operator, a swimming operator and a tracing operator that at the same time records the optimal position of individual E. Coli and the location of all E. Coli swarm in order to update the locations of swarm. This paper proposes the simplified optimization algorithm for estimating the parameters such a curve to testing the effectiveness of the optimization algorithm. Comparison of simplified E. Coli foraging optimization algorithm results with those of GA and LS methods showed that the improved optimization algorithm is more effective for estimating the parameters of above curve.