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The integration between Bluetooth technology and the field bus is an important item in the industry field application of the wireless communication. By the analysis of Bluetooth technology and the field bus network topology architecture, we put over the interconnect topology architecture based on Bluetooth wireless sensor network and CAN bus, also finish the system hardware design and software development...
The paper first analyzes the characteristics of embedded Ethernet chips LAN91C111 constituted to the embedded Ethernet module. With C language programming driver, the designed interface circuit between the communication module and MCM Multi Chip one verifies the fast transmission speed by the communication test between PC and the embedded Ethernet module and word well on the low-voltage bus distributed...
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...
This monitoring program transmits data and realizes the real-time monitoring of each circular knitting machine by wireless network instead of the traditional wired network. Based on the ZigBee technology, the wireless sensor network in the program is constituted by ordinary sensor node, the sink node and network coordinator, and responsible for acquiring and transmitting condition information of circular...
In order to solve the problem that program-code of the sensor node in wireless sensor network was difficult to upgrade, the application layer protocol OTA-WSN was presented. With reference to the OTA Technology applied in mobile network, this paper defined the functions of each communication sector in the protocol, including package's format of the application layer packages and data transfer protocol...
There has been significant development in wireless technology which has enabled us to connect devices with conveniences. This paper makes an effort to utilize one of the wireless technologies ZigBee to programmable logic controller (PLC) so that the remote field devices can be controlled without wiring.
China's networks and railways develop rapidly, which urgently requires mobile Internet access. However there exist challenges on network integration of access schemes, on network applications of the transition period, on high cost of all-coverage access, on high bit error rate, on frequent interruption, and on traffic explosion. The proposed multi-homing hierarchy DTN-based train mobile Internet access...
This paper describes the implementation of a passive RFID tag according to the ISO/IEC 18000-6B standard targeting low power implementation, which works on 915 MHz UHF frequency. Modu1es designed were put forward in detail. The solution of RFID software was offered. The whole circuit is in prove simple and of low power Consumption.
The paper introduces an automatic meteorological data acquisition system based on embedded processor and used in distributed control network. The system which is accessed CAN Bus by CANopen communication protocol realizes remote monitoring and collecting for meteorological data. The ARM7 core LPC2368 and 24 bit high precision AD converter AD7793 are included in the system. Temperature, humidity, wind...
Aiming at the weakness of poor scalability of the IVR (Interactive Voice Response) system, this paper presents a smart IVR system. The structure, functions, intelligent algorithms of the IVR system are described in detail. The application gateway that connect the IVR and the business system is very important for the IVR system. The voice files of data demanded are built and played for response through...
The truck exhaust emissions and processing technology is analysed. Developed system is based on SCR technology, controlling metering pump by Stepper Motor to get precise delivery of the selective catalytic reducer such as urea. TMS320F28016 DSP is adopted as core control unit and SLA7062 is adopted as the stepper motor driver chip. As the SAE J1939 protocol does not define node parameters of exhaust...
The supervisory information in pipeline such as the temperature and the pressure difference should be transferred by the smart plug, meanwhile the actions such as the plugging, plugging releasing, and safe preparedness starting should be realized according to the outside control instructions. Therefore the special low-frequency modem should be designed to solve the communication problems. According...
The EnDat2.2 interface protocol developed by HEIDENHAIN company lately with its high-speed, bi-directional and pure digital features can meet the requirement of rapid responses, dramatically cut down the overall system's cost and greatly reduce the space requirements of the system's installation. Therefore, it is widely used in Numerical control system like CNC system and photoelectric encoder. China's...
Content audit analyzes the messages of application layer communication between the peers, and matches the set security policies to ensure legitimate and effective use of network resources. The link management is one of the key issues in designing the content audit system. In order to achieve efficient management of TCP links and the correlation analysis of the same session, the hash list is proposed...
Summary of e-commerce security is a complicated systematic project, the need from a technical point of view and to be protected in legislation to regulate various kinds of problems exist in e-commerce. This paper discusses the existence of e-commerce applications, security issues; e-commerce security technology is analyzed.
Recently, more and more enterprises with large EIS systems have increasing business demands on enhancing the system's scalabilities and service abilities. They may want to reuse the existing business logic code deployed in the legacy systems, e.g. core banking systems, in the newly developing systems to meet the new business requirements. Therefore, a big challenge lies on that how to integrate these...
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 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...
The tractor speed of all-position automatic pipeline welding carriage was controlled smoothly, which is the important guarantee for improving efficiency of welding and quality of welding. In allusion to the strict demand of synchronization of dual motor driving the running mechanism, the profile velocity operating mode using for vector group based on CAN-open protocol is presented, a novel protocol...
Wireless sensor networks (WSN) have been recently be proposed for great deal of applications in industrial automation, health and environment monitoring. Increasingly there is a need to access wireless sensor networks from other IP-based networks. However, WSN has its own application-specific non-standardized protocols such as data-centric router protocol, which is a significant challenge to establish...
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