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ISSN: 2250–3676

T.LAKSHMI* et al. [IJESAT] INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE & ADVANCED TECHNOLOGY

Volume - 2, Special Issue - 1, 33 – 36

A GENERALISED EMBEDDED WEBSERVER BASED ON WIRELESS SENSOR NETWORK FOR INDUSTRIAL MONITORING T.Lakshmi1, M.Suman2 1

Research Scholar, Dept. of E.C.M, K.L. University, A.P, India,thummapudilakshmi@gmail.com 2 Associate Professor, Dept. of E.C.M, K.L. University, suman.maloji@ gmail.com

Abstract Sensor network has quick installation, dynamic configuration features. These features make it very suitable for its applications in the environment without wired backbone network, such as conferences, research, sports grounds, crowd control, emergency recovery, and the battlefield military. This paper describes the application of embedded wireless sensor network system underlying software, mainly introduces LPC2148 ARM7 chip configuration, pin multiplexing configuration, the clock configuration, .This paper also describes an investigation into the potential for remote controlled operation of Device control automation systems .The main theme of this is that to measure both temperature and pressure of the both stations (station1 and station2) in the personal computer by providing with the help of the URL (web address) that is any one can measure the values of both temperature and pressure values from anywhere where internet is available . This paper describes the application of embedded wireless sensor network system underlying software, mainly introduces LPC2148 ARM7 chip configuration, pin multiplexing configuration

Index Terms: Wireless Sensor Node, Industrial control, web server, WiMedia.. --------------------------------------------------------------------- *** ----------------------------------------------------------------------1. INTRODUCTION The design of wireless sensor systems is characterized by a strong trend towards embedding more intelligence into the machines. Quite often sensors are mounted on moving parts. Common implementations use wires running between the fixed and the mobile part of the machine to supply power and acquire information from the sensor. However, such an approach suffers of reliability problems, due to wear and tear of the cables, and in some cases is not even possible due to constraints of movement. A completely wireless solution (both for data and power transfer) would clearly be a solution to both issues, and would hence be a breakthrough in the industrial control field. Converting a wired implementation into a wireless version poses however many challenges. Firstly because a radio link does not have the same capacities as a wire, in terms of reliability and latency, and secondly because a wireless power transfer must also be provided, imposing requirements on low power consumption. In this paper, we report our research and development effort on a wireless sensor node, which targets the so-called industrial application class. Wireless sensor network is a wireless LAN networking form, is a dynamic self-organizing network system composed by wireless mobile nodes with arbitrary and temporary network topology, the network does not require use of any centralized infrastructure or standard support services in wide area network, and each node can be used as host and router.

Figure 1: System architecture Figure 1 shows the components of the desired system. The sensor unit may be powered from the same source as the storage unit, or it may be battery powered, enabling more flexible installation and setup. In the following sections, we discuss the general design of the sensor unit, and its implementation using a SenSiFi wireless sensor networking module from Redpine Signals Inc. 802.11n wireless communication. The desired core connectivity function is provided by an integrated 802.11n wireless section that

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ISSN: 2250–3676

T.LAKSHMI* et al. [IJESAT] INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE & ADVANCED TECHNOLOGY includes a baseband processor, MAC, analog front end, an RF transceiver and power amplifier, a frequency reference, and optionally an antenna. A characterized and, if necessary, calibrated RF section provides uniform performance— consistent across all nodes—and reduces the validation requirements for the completed system. Most of the WLAN protocol tasks are carried out in software, and the burnt-in embedded firmware takes care of the standards-compliant WLAN connectivity. The software handling the sensor configuration and control, and the packaging of the data collected can therefore be developed independently. The SenSiFi module (Figure 2) provides this facility, with users entering only the network configuration information.

Volume - 2, Special Issue - 1, 33 – 36

3.SENSOR BOARD The Sensor Board contains the image sensor in Fig.3, an ADC, an actuator (led), and some additional conditioning circuitry. The ADC and the image sensor are controlled by the ARM microprocessor while the led is controlled by the PSoC. The ADC is used as an interface between the microcontroller and the image sensor, which has an analog output. The led output level is controlled with an analog voltage generated by the PSoCdrives.

2. MOBILE SENSOR NODE ARCHITECTURE Figure 2 depicts the top level architecture of the Mobile Sensor Node. Because of the large variation in sensor types modular architecture for the sensor node is required, so that the node can be easily reworked for many sensing applications. Hence, the system has been divided in 3 parts: 1. 2.

3.

A main board including a microcontroller, a PSoC, and A power conditioning module. This board is the same for all applications, and offers enough flexibility to be reconfigured for different applications or sensor types. An off-the-shelf WiMedia radio module. A sensor module or board that interfaces with the main board via a general purpose connector. For the studied application the board included a linear image sensor along with its interfacing circuitry. The Mobile Sensor Node is supplied with an inductive link. The power is transmitted to the node by the coupling of two coils and then rectified to supply all the components.

Figure 2: Mobile Sensor Node system overview

Figure 3: Industrial Wireless Sensor Node

4. ARM chip initialization The entire startup code is composed by two compilation file (Startups and IRQ.s), one C file (taxgat.c and two header file which are target.h and config.h), and the file structure shown in figure 4. LPC2294.h and decentralized load file are not an integer part of the startup files

Figure 4: file structure

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ISSN: 2250–3676

T.LAKSHMI* et al. [IJESAT] INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE & ADVANCED TECHNOLOGY

5. EMBEDDED WEB SERVER The system structure of embedded Web server is shown in Fig. 5. The entire system uses BIS mode. The client PC is connected to the Internet through a browser and then gets access to the embedded Web server. Through this way, remote login and operation are realized. Compared with the traditional CIS mode, this mode is simple to use, convenient to maintain, and easy to extend

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WiMedia-based radio solution achieves latencies that are one order of magnitude better than current state-of-the-art platforms. This paper introduced the implementation of the embedded wireless sensor network system using web server described in detail. We can conclude that our highperformance mobile sensor platform proves the feasibility of our technology choices for both wireless data communication and wireless power transfer and control the devices using the web server.

REFERENCES 1. P. Bose, P. Morin, I. Stojmenovic, and J.Urrutia, Routing with guaranteed delivery in ad hoc wireless networks, ACM Wireless Networks, 7, 6, November 2001, pp.609-616. 2. E. Callaway, P. Gorday, L. Hester, J. A. Gutierrez, M. Naeve, B. Heile, and V. Bahl, Home Networking with IEEE802.15.4: A Developing Standard for Low-Rate Wireless Personal Area Networks, IEEE Communications Magazine, Vol. 40, No. 8, August 2002, pp. 70-77. 3. A. P.Chandrakasan,R.Amirtharajah, S. Cho, J. Goodman, G. Konduri, J. Kulik, W. Rabiner, and A. Wang, Design Considerations for Distributed Microsensor Systems, Proc. IEEE Custom Integrated Circuits Conference (CICC 1999), San Diego, CA, May 1999, pp. 279-286. Figure 5: Embedded web server Remote maintenance is performed by different communication protocols. The most common communication protocol is HTTP which enables remote system control and monitoring. A web server is a computer program that implements HTTP protocol. It accepts HTTP requests from clients like web browsers and serves HTTP responses which are usually HTML pages with linked objects. HTTP is a simple protocol that is based on a TCP/IP protocol stack (picture 1.A). HTTP uses TCP (Transmission Control Protocol). TCP is a relative complex and high-quality protocol to transfer data by the subordinate IP protocol. TCP itself always guarantees a safeguarded connection between two communication partners based on an extensive three-way- handshake procedure. As a result the data transfer via HTTP is always protected. Due to the extensive TCP protocol mechanisms HTTP offers only a low-grade performance.

6. CONCLUSION The presented mobile sensor platform supports a wide range of industrial control applications, all of which are characterized by stringent requirements in terms of latency. In view of these, sometimes extreme, timing requirements, our

4. W. Heinzelman, A. Chandrakasan, and H. Balakrishnan, Energy-Efficient Communication Protocol for Wireless Microsensor Networks, Proc. 33rd Hawaii International Conference on System Sciences (HICSS), Jan. 2000, pp. 3005-3014. 5. D. Z. W. Richard Stevens, TCP/IP Illustrated vol. 1,Addison-Wesley(2007). 6. Andreas Willig, Kirsten Matheus, Adam Wolisz, Wireless Technology in Industrial Networks, Proceedings of the IEEE Volume 93, Issue 6, June 2005. 7. Xingfa Shen, Zhi Wang, and Youxian Sun, Wireless Sensor Networks for Industrial Applications, Proceedings of the 5th World Congress on Intelligent Control and Automation, Hangzhou, China, June, 2004. 8. Jing Weina Department of Computer Science, Henan Institute of Urban Construction ,Embedded Wireless Sensor Network System Design, 978-1-4244-6349-7/10/$26.00 _c 2010 IEEE.

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T.LAKSHMI* et al. [IJESAT] INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE & ADVANCED TECHNOLOGY

ISSN: 2250–3676 Volume - 2, Special Issue - 1, 33 – 36

9. Feng Bo1,Wang Junfeng1,Sun YouXiao1,Wang Lina2, The Application and Design of Embedded Wireless Sensor Networks, 978-1-4244-5182-1/10/$26.00 _c 2010 IEEE. 10. Anna Hac, Embedded Systems and Sensors in Wireless Networks, 0-7803-9305-8/05/$20.00 ©2005 IEEE.

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1. INTRODUCTION ISSN: 2250–3676 Abstract IJESAT | Jan-Feb 2012 [IJESAT] INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE & ADVANCED TECHNOLO...

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