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CONTROLLING ROBOTS USING WIRELESS FIDELITY


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Abstract

By 1997 the idea of fidelity (from the Spanish word fidelita meaning accuracy, spread widely in a certain place) became popular which gave birth to the hot technology of present namely WI-FI i.e., wireless fidelity. It was developed to improve the interoperability of wireless local area network products based on the IEEE 802.11 standards by providing communication between nodes via RF waves of certain frequency The basic idea behind this paper includes the concept of Wi-Fi and simple microprocessors which can be used for guiding the Final Control Element of typical robots (more often they are stepper motors). Normally the wireless control of Robots are done using higher level microprocessors/controllers, complex coding in the receiving side with single channel transmission of control signals which proves too costly for local use.

An Introduction to WI-FI

What Is Wi-Fi?

A wireless network uses radio waves, just like cell phones, televisions and radios do. In fact, communication across a wireless network is a lot like two-way radio communication.. But WiFi radios have a few notable differences from other radios: . This connection is convenient and virtually invisible, and it's fairly reliable. If the router fails or if too many people try to use high-bandwidth applications at the same time, however, users can experience interference or lose their connections.

IEEE Standard Definition

Wi-Fi Alliance is a consortium of separate and independent companies agreeing to a set of common interoperable products based on the family of IEEE 802.11 standards. Wi-Fi certifies products via a set of established test procedures to establish interoperability. Those manufacturers that are members of Wi-Fi Alliance whose products pass these interoperability tests can mark their products and product packaging with the Wi-Fi logo .

How a WI-FI works?

An allowable frequency of 2.4 GHz or 5 GHz is provided for the use of WI-FI. The radio frequency waves or the infrared waves are allowed to be in a certain area. The wireless modem keeps track of all the node devices and will be connected to a main computer.

USING Hot Spots

If we want to take advantage of public WiFi hotspots or start a wireless network in your home, the first thing you'll need to do is make sure your computer has the right wireless gear. Most new laptops and many new desktop computers come with built-in wireless transmitters. Wireless home networks are convenient as well. They allow us to easily connect multiple computers and to move them from place to place without disconnecting and reconnecting wires.

LATEST ADVANCEMENTS

Embedded systems in WI-FI

Wi-Fi availability in the home is on the increase. This extension of the Internet into the home space will increasingly be used for remote monitoring In all these kinds of implementation, if the Wi-Fi provision is provided using a system running one of operating systems mentioned above, then it becomes unfeasible due to weight, power consumption and cost issues. Increasingly in the last few years (particularly as of early 2007), embedded Wi-Fi modules have become available which come with a real-time operating system and provide a simple means of wireless enabling any device which has and communicates via a serial port.

FUTURE TRENDS

In the earlier stages when WI-FI is used, the primary use was in the networking side.

WI-FI for digicams

Even the digicam companies are planning to enter in the field of WI-FI. Providing hotspots in tourist places will enable the customers to share the photos, upload them to internet or even to take a print out copy.

The Future

Intellon's PowerPacket technology is compatible with wireless and HomePNA solutions, making power-line an ideal option to serve as the backbone for a multi-technology home network. In this case, consumers will not have to discard their existing network solutions in favor of a new standard. The one common thread among all of the networking options is the need for power. While a wireless solution may indeed shun wires, its access point is still going to be plugged in at some point

WIRELESS CONTROL OF ROBOTS USING WI-FI integration

Introduction
ROBOTICS is a special term in the field of technology. It’s a pet of all departments, Be it Electronics, Instrumentation, Computer Engineering, Information technology or Mechanical. There is no field without being related to robots. That’s why there is always a tremendous increase in the robotic field..

Even though a lot of success had been sawn by the past 4 decades there is still a thirst among the techies to make precise robots and controlling them effectively. Mostly wireless robots are controlled by single channel receiver/transmitter, complex microprocessors and controllers. Here we will be discussing about the technique to control wireless robots using WI-FI with simple microprocessors and controllers. This is a theoretical concept and we are trying to make the best possibilities to make it as a practically possible one. Follows is the proposed block diagram and of my concept.

What is Robot control using WI-FI integration?

The individual parts/final control element of Robots(most probably the stepper motor) will be made to controlled by a simple processor such as 8085/8086 which are pre programmed to behave in certain ways. The µp will be interfaced with USART which in turn will be connected to Wi-Fi adapter. For a single robots there will be such a lot of arrangements and they can controlled using simple data(Simple data inputs to µp controls the final control element). These data are given from a certain number of input devices which are integrated to form a single input device and they are connected to communicate the nodes by providing hotspots. And our name to this concept is robot control using wi-fi integration

This is How it will Work

The processors are preprogrammed to carry out a certain actions with reference to particular parameters Since the 8085 microprocessors can accept binary input, the apt controls are coded as opcode and input is give from control side The input (ie., the control signals for fce) given are transmitted to hotspots which are received by wireless adapters

The signals are given to microprocessor via the interfacing device USART Usart is Universal Synchronous/Asynchronous Receiver/Transmitter a popular interface for 8085/8086 microprocessors Control is done from integrated control side by the apt opcodes.

Advantages

Controlling is done by opcode input which are simple Since primitive type of processors is used it would be easier to coding and even recoding. In a single transmission line if there is failure in one point the entire network will collapse whereas in this case WiFi is used the failure at one point wont affect other fde Architecture complexity can be reduced. Cost can be made comparatively lesser. Direct Monitoring by computers are possible with proper interfacing

Conclusion

We are living in an absolute world of technology rocketing at a greater speed searching for more and more instruments to make life of humane even sophisticated. Computer engineering and Instrumentation with clenched fists had made a lot of successful techoes like PLC, DCS.., hope this WI-FI controlled Robots will make the next Generation.

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