GOVERNMENT POLYTECHNIC, PUNE

CERTIFICATE

This is certify that Ashwin Tumma, Enrollment No.

0506039, Third Year Diploma in Computer Engineering has

successfully completed his Seminar Report on the topic

BLUE EYES

HUMAN OPERATOR MONITORING SYSTEM.

as a part of his Diploma Curriculum in the academic year

2007-08.

Date : 6th October,2007

Seminar Guide Head of Dept. Principal

(Prof. U. V. Kokate) (Prof. U. V. Kokate) (Prof. C. R. Joshi)

2

ACKNOWLEDGEMENTS

I take this opportunity to express my profound gratitude to my

Project and Seminar guide Prof. U. V. Kokate Sir, for all the valuable

guidance and support that he rendered.

Sir also guided through the essence of time management,

need of efficient organizing, presentation skills criterion in seminar and

designing of a product from the user’s perspective. This assisted me to

be more selective in presentations.

Over the weeks, the Staff of Computer Engineering Department,

has also provided significant encouragement and extended their

invigorous support. I also thank them for their invaluable guidance.

Tumma Ashwin K.

(0506039)

Third Year Computer

3

CONTENTS

Chapter

NoName Page No

1 Introduction1.1 A Glimpse of Bluetooth Technology 1.1.1 Basics of Bluetooth Technology 1.1.2 Interface 1.1.3 Specification Makeup 1.1.4 Spectrum 1.1.5 Range 1.1.6 Power1.2 Motivation for the Development of the System1.3 What is Blue Eyes System? 1.1.1 Technology 1.1.2 System Design Overview 1.1.3 System features 1.4 Misconceptions about the System

5

7

8

92 System Design

2.1 Designing System 2.1.1 Design Methodologies 2.1.2 Design objectives2.2 System Overview2.3 Data Acquisition Unit (DAU) 2.3.1 Hardware 2.3.2 Features of DAU2.4 Central System Unit (CSU) 2.4.1 Introductory Modules 2.4.2 Connection Manager Module 2.4.3 Data Analysis Module 2.4.4 Data Logger Module 2.4.5 Visualization Module

11

1214

18

3 Security and Application Areas3.1 Security of data in the System3.2 Application area of the System

2122

4 Merits and Demerits4.1 Merits of the System

4.2 D 4.2 Demerits of the System 2323

5 A Generic Touch to the future of System5.1 Future enhancements in the System 24Summary 26

4

Bibliography 27

5

CHAPTER 1: INTRODUCTION

1.1 A GLIMPSE OF THE BLUETOOTH TECHNOLOGY

1.1.1 Basics of Bluetooth

Bluetooth wireless technology is a short-range

communications technology intended to replace the cables connecting

portable and/or fixed devices while maintaining high levels of security.

The key features of Bluetooth technology are robustness, low power,

and low cost. The Bluetooth specification defines a uniform structure

for a wide range of devices to connect and communicate with each

other.

Bluetooth technology has achieved global acceptance such

that any Bluetooth enabled device, almost everywhere in the world,

can connect to other Bluetooth enabled devices in proximity. Bluetooth

enabled electronic devices connect and communicate wirelessly

through short-range, ad hoc networks known as piconets. Each device

can simultaneously communicate with up to seven other devices within

a single piconet. Each device can also belong to several piconets

simultaneously. Piconets are established dynamically and

automatically as Bluetooth enabled devices enter and leave radio

proximity.

A fundamental Bluetooth wireless technology strength is

the ability to simultaneously handle both data and voice transmissions.

This enables users to enjoy variety of innovative solutions such as a

hands-free headset for voice calls, printing and fax capabilities, and

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synchronizing PDA, laptop, and mobile phone applications to name a

few.

1.1.2 Interface

Bluetooth technology’s adaptive frequency hopping (AFH)

capability was designed to reduce interference between wireless

technologies sharing the 2.4 GHz spectrum. AFH works within the

spectrum to take advantage of the available frequency. This is done by

detecting other devices in the spectrum and avoiding the frequencies

they are using. This adaptive hopping allows for more efficient

transmission within the spectrum, providing users with greater

performance even if using other technologies along with Bluetooth

technology.

1.1.3 Specification Make-up

Unlike many other wireless standards, the Bluetooth

wireless specification gives product developers both link layer and

application layer definitions, which supports data and voice

applications.

1.1.4 Spectrum

Bluetooth technology operates in the unlicensed industrial,

scientific and medical (ISM) band at 2.4 to 2.485 GHz, using a spread

spectrum, frequency hopping, full-duplex signal at a nominal rate of

1600 hops/sec.

1.1.5 Range

7

The operating range depends on the device class:

Class 3 radios – have a range of up to 1 meter or 3 feet

Class 2 radios – most commonly found in mobile devices – have a

range of 10 meters or 30 feet

Class 1 radios – used primarily in industrial use cases – have a range of

100 meters or 300 feet

1.1.6 Power

The most commonly used radio is Class 2 and uses 2.5 mW

of power. Bluetooth technology is designed to have very low power

consumption. This is reinforced in the specification by allowing radios

to be powered down when inactive.

1.2MOTIVATION FOR THE DEVELOPMENT OF THE

SYSTEM

Human error is still one of the most frequent causes of

catastrophes and ecological disasters. The main reason is that the

monitoring systems concern only the state of the processes whereas

human contribution to the overall performance of the system is left

unsupervised. The control instruments are automated to a large

extent, so a human–operator becomes a passive observer of the

supervised system, which results in weariness and vigilance drop.

Thus, he may not notice important changes of indications causing

financial or ecological consequences and a threat to human life. It

therefore is crucial to assure that the operator’s conscious brain is

involved in an active system supervising over the whole work time

period.

8

It is possible to measure indirectly the level of the

operator’s conscious brain involvement using eye motility analysis.

Although there are capable sensors available on the market, a complex

solution enabling transformation, analysis and reasoning based on

measured signals still does not exist. In large control rooms, wiring the

operator to the central system is a serious limitation of his mobility and

disables his operation. Utilization of wireless technology becomes

essential.

1.3 WHAT IS BLUE EYES SYSTEM?

1.3.1 Technology

The system developed is intended to be the complex

solution for monitoring and recording the operator’s conscious brain

involvement as well as his physiological condition. For this designing a

Personal Area Network is required linking all the operators and the

supervising system. As the operator using his sight and hearing senses

the state of the controlled system, the supervising system will look

after his physiological condition.

1.3.2 System design overview

The system consists of a portable measuring unit and a

central analytical system. The mobile device is integrated with

Bluetooth module providing wireless interface between the operator-

worn sensors called the Data Acquisition Unit (DAU) and the central

unit called the Central System Unit (CSU). ID cards assigned to each of

the operators and adequate user profiles on the central unit side

provide necessary data personalization so that different people can

use a single sensor.

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Why the name BlueEyes?

The main thing is to explain the name of the system.

BlueEyes emphasizes the foundations of the project – Bluetooth

technology and the movements of the eyes. Bluetooth provides

reliable wireless communication whereas the eye movements enable

us to obtain a lot of interesting and important information.

1.3.3 System features

BlueEyes system provides technical means for monitoring

and recording human-operator's physiological condition. The key

features of the system are:

• visual attention monitoring (eye motility analysis)

• physiological condition monitoring (pulse rate, blood

oxygenation)

• operator's position detection (standing, lying)

• wireless data acquisition using Bluetooth technology

• real-time user-defined alarm triggering

• physiological data, operator's voice and overall view of the

control room recording

• recorded data playback

1.4MISCONCEPTIONS ABOUT THE BLUE EYES SYSTEM

Knowing what the Blue Eyes System actually is, it is

obvious that there arise many misconceptions about the Blue Eye

System in the user’s or the operators mind. Here’s an attempt to clear

some of the misconceptions about the System.

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The Blue Eyes System does not predict or interpret with

the operator’s thoughts. Rather it is designed just to monitor the

physiological condition of the operator. The system interprets with the

operator’s state of brain with the help of eye motility analysis, on the

contrary the thoughts of the operator are been initiated in the mind of

the operator. So, there arises no concept of the system interpreting the

operator’s thoughts.

Also the second misconception that arises is that, Is this

system able to compel or force the operator to work? No! The Blue

Eyes system cannot force the operator directly to work with the

desired system or carry out specific tasks that are assigned to him. It is

the duty of the system administrator to monitor the operator, and then

to take appropriate measures for the irregularity of the operator, when

such a kind of system is employed in a Personal Area Network.

11

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CHAPTER 2: SYSTEM DESIGN

2.1 DESIGNING SYSTEM

2.1.1Design Methodologies

In creating the Blue Eyes system a waterfall software

development model is used since it is suitable for unrepeatable and

explorative projects. During the course of the development UML

standard notations are used. They facilitate communication between

team members; all the ideas are clearly expressed by means of various

diagrams, which is a sound base for further development.

The results of the functional design phase were

documented on use case diagrams. During the low-level design stage

the whole system is divided into modules. Each of them has an

independent, well-defined functional interface providing precise

description of the services offered to the other modules. All the

interfaces are documented on UML class-, interaction- and state

diagrams. At this point each of the modules can be assigned to a team

member, implemented and tested in parallel. The last stage of the

project is the integrated system testing.

2.1.2Design Objectives

If such a system is to be practically or commercially

implemented into practice then the following criterions should be taken

care of when the system is designed to be served in a particular

context.

• A mobile Data Acquisition device should be configured upon a

legitimate operator of the system. The range and connections of

the two communicating Bluetooth modules should also be taken

into consideration.

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• A reliable time-buffering, processing and recording mechanism

should be configured at the right location and it should also fall

within the range of the Bluetooth transmitting device so that it

can receive the signals and data at the optimal level.

• A clear visualization interface is to be maintained in the Central

System Unit of the system for the graphical or a visual display of

all the activities that are being monitored by the system. A visual

representation of the physiological activities also helps the

supervisor of the system to reconstruct the course of the

selected operator’s duty.

• There should also be a mechanism for the customary analysation

of the data that is received by the Bluetooth module.

• The system design implementation should also ensure a

possibility of distributing the processing among a number of

computers. i. e. the data operator’s data are to be recorded by

separate instances of the Data logger and then further passed on

to the processing to a distributed processing network, so as to

speed up the processing and also for accomplishment of

distributed database processing.

2.2 SYSTEM OVERVIEW

BlueEyes system provides technical means for monitoring

and recording the operator’s basic physiological parameters. The most

important parameter is saccadic activity, which enables the system to

monitor the status of the operator’s visual attention along with head

acceleration, which accompanies large displacement of the visual axis.

Complex industrial environment can create a danger of exposing the

operator to toxic substances, which can affect his cardiac, circulatory

and pulmonary systems. Thus, on the grounds of plethysmographic

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signal taken from the forehead skin surface, the system computes

heart beat rate and blood oxygenation.

The BlueEyes system checks above parameters against

abnormal (e.g. a low level of blood oxygenation or a high pulse rate) or

undesirable (e.g. a longer period of lowered visual attention) values

and triggers user-defined alarms when necessary.

Quite often in an emergency situation operators speak to

themselves expressing their surprise or stating verbally the problem.

Therefore, the operator’s voice, physiological parameters and an

overall view of the operating room are recorded. This helps to

reconstruct the course of operators’ work and provides data for long-

term analysis.

Our system consists of a mobile measuring device and a

central analytical system. The mobile device is integrated with

Bluetooth module providing wireless interface between sensors worn

by the operator and the central unit. ID cards assigned to each of the

operators and adequate user profiles on the central unit side provide

necessary data personalization so different people can use a single

mobile device called DAU – Data Acquisition Unit. The overall system

diagram is shown in Figure 1.

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8051 familymicrocontroller

Physiologicalparameters

sensor

Bluetoothdevice

Database

Bluetoothdevice

Connection ManagerModule

Data LoggerModule

Data AnalysisModule

VisualisationModule

Data Acquisition Unit Central System Unit

Voiceinterface

Figure 1. Overall system diagram

The tasks of the mobile Data Acquisition Unit are to

maintain Bluetooth connections, to get information from the sensor

and sending it over the wireless connection, to deliver the alarm

messages sent from the Central System Unit to the operator and

handle personalized ID cards. Central System Unit maintains the other

side of the Bluetooth connection, buffers incoming sensor data,

performs on-line data analysis, records the conclusions for further

exploration and provides visualization interface.

Performance requirements

The portable nature of the mobile unit results in a number

of performance requirements. As the device is intended to run on

batteries, low power consumption is the most important constraint.

Moreover, it is necessary to assure proper timing while receiving and

transmitting sensor signals. To make the operation comfortable the

device should be lightweight and electrically safe. Finally, the use of

standard and inexpensive ICs will keep the price of the device at

relatively low level.

The priority of the central unit is to provide real-time buffering of

incoming sensor signals and semi-real-time processing of the data,

which requires speed-optimized filtering and reasoning algorithms.

Moreover, the design should assure the possibility of distributing the

processing among 2 or more central unit nodes (e.g. to offload the

database system related tasks to a dedicated server).

2.3 DATA ACQUISITION UNIT (DAU)

2.3.1Hardware

16

Atmel 89C52 microcontroller is said to be the core of the

Data Acquisition Unit since it is a well-established industrial standard

and provides necessary functionality (i.e. high speed serial port) at a

low price.

Microcontroller 89C52 features :

ROM 4K bytes RAM 128 bytesTimer 3 I/O pins 32 Serial port 1

89C52 – ‘C’ signifies a CMOS microcontroller

­ Has on- chip ROM in form of Flash memory.

­ Ideal for fast development since flash memory can be erased in

seconds.

­ It requires a ROM burner that supports flash memory; however

ROM eraser is not required.

Eye Motility Analysis :

Fig : Eye Motility Analysis

Eye motility analysis means that the eye of the operator is

been monitored and analyzed for the current conditions in it. The

camera fixed in the Jazz Multisensor is used to measure and monitor

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the conditions in the eye (specifically retina). The camera monitors the

retinal structure and reports its conditions to the Jazz Multisensor.

Fig : Jazz Multisensor

The second component of the Data Acquisition Unit is the

Jazz Multisensor that is to be mounted on the head of the operator.

This multisensor will sense from the forehead of the operator and then

send the plethysmographic signals to the Bluetooth module of the DAU

for its transmission to the Central System Unit (CSU) for processing.

The Jazz Multisensor, the name itself indicates that it is

used to sense or monitor multiple parameters. It is an Eye position

measuring component of the DAU. Through direct infrared

oculography, it measures the movement of the macula of the eyes and

accordingly interprets them and passes this to the microcontroller for

processing. It also measures the Oxyhemoglobin and deoxyhemoglobin

of operator that is used to measure the pulse rate, blood oxygenation

of the operator. It has an two axial accelerometer that is used to detect

the operator’s position (standing, lying). It also has an Ambient light

sensor to sense the light coming from the external part of the macula

or the eyes.

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It has a camera to sense the saccade. A saccade is a rapid

eye jump to a new location assigned by the conscious attention

process. The saccade is used to measure the movement of eyes. All

the other physiological conditions of the operator are determined by

the signals detected from the retina of the eye. The retina of the eye is

in connection with the brain by means of optical nerves. In this way,

the physiological conditions of the operator are monitored.

All these physiological conditions that are monitored by the

Jazz Multisensor are then passed to the Data Acquisition Unit. The DAU

in turn transmits it to the CSU, where the processing or monitoring of

the acquired data is done. An interesting fact to be noted about the

Jazz Multisensor id that it can be worn by any operator (identification is

done later) and spectacles can also be worn by the operator while

working with the system. It makes no difference to the Multisensor.

Safety ?

Now, there arises a question of, Is it safe to use this device

on the forehead and in front of the eyes? Our eyes are protected

against very bright light sources by the natural aversion response to

viewing bright light sources. This aversion limits the duration of

exposure to a fraction of about 0.25 second. The potential for retinal

damage from commercially available light source used as a task light

was evaluated. The American Conference of Governmental Industrial

Hygienists (ACGIH) carried out research. After many researches, the

Conference came to a conclusion that there is no thermal or blue light

hazard to the retina unless and until the operator elects to focus on the

light source.

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2.3.2Features of DAU

If the features of the Data Acquisition Unit (DAU) are to be

listed out, then they would be as follows:

• The unit is very light in weight. Since it comprises only of the Jazz

Multisensor, the Atmel microcontroller 89C52 and the Bluetooth

module that transmits or transfers the data or signals to and

from the Central System Unit (CSU).The Data Acquisition Unit

(DSU) is just the hardware device that is to be worn by the

operator on his forehead and the Jazz Multisensor, Atmel

microcontroller and Bluetooth module are embedded in the unit

itself. So the overall weight of the unit is very less as only the

unit needs to be housed on the operators forehead.

• The power that is required by the Data Acquisition Unit for its

operation is supplied by the batteries that are mounted on the

headset that is to be worn by the operator. The power is require

only for the operation of the microcontroller and the Bluetooth

module. This signifies that this unit in the system consumes

much less amount of power for its operation.

• The unit has a very simple functionality and also it is easy to use

by a common operator. It is simply to be worn by the operator,

not to look after it. It also does not disturb the operator in his

work, neither physically or morally.

• This unit takes care in regard to authentication also. It only

allows access to the legitimate users or rather operators of the

system. This is accomplished by making the use of personalized

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ID cards that are to be inserted in the ID card interface. From

here they are tested for authorization. The personalized data of

the operator is also been embedded into the ID card that allows

the system unit to monitor the unique operator.

2.4 CENTRAL SYSTEM UNIT (CSU)

2.4.1Introductory Modules

CSU software is located on the delivered Toshiba

laptop, in case of larger resource demands the processing can be

distributed among a number of nodes. In this section we describe the

four main CSU modules (see Fig. 1): The various modules that are

included in this unit are:

• Connection Manager

• Data Analysis Module

• Data Logger Module

• Visualization Module.

The modules exchange data using specially designed single-producer-

multi-consumer buffered thread-safe queues. Any number of consumer

modules can register to receive the data supplied by a producer. Every

single consumer can register at any number of producers, receiving

therefore different types of data. Naturally, every consumer may be a

producer for other consumers.

2.4.2Connection Manager Module

Connection Manager’s main task is to perform low-level

Bluetooth communication using Host Controller Interface commands. It

is designed to cooperate with all available Bluetooth devices in order to

support roaming Additionally, Connection Manager authorizes

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operators, manages their sessions, demultiplexes and buffers raw

physiological data.

Transport Layer Manager hides the details regarding actual

Bluetooth physical transport interface (which can be either RS232 or

UART or USB standard) and provides uniform HCI command interface.

Bluetooth Connection Manager is responsible for

establishing and maintaining connections using all available Bluetooth

devices. It periodically inquires new devices in an operating range and

checks whether they are registered in the system database. Only with

those devices the Connection Manager will communicate.

The data of each supervised operator is buffered

separately in the dedicated Operator Manager.

Operator Data Manager provides an interface to the

operator database enabling the other modules to read or write

personal data and system access information.

2.4.3Data Analysis Module

The module performs the analysis of the raw sensor data in

order to obtain information about the operator’s physiological

condition. The separately running Data Analysis Module supervises

each of the working operators. The module consists of a number of

smaller analyzers extracting different types of information. Each of the

analyzers registers at the appropriate Operator Manager or another

analyzer as a data consumer and, acting as a producer, provides the

results of the analysis. An analyzer can be either a simple signal filter

(e.g. Finite Input Response (FIR) filter) or a generic data extractor (e.g.

signal variance, saccade detector) or a custom detector module. The

computed features can be e.g. the operator’s position (standing,

walking and lying) or whether his eyes are closed or opened.

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2.4.4Data Logger Module

The module provides support for storing the monitored

data in order to enable the supervisor to reconstruct and analyze the

course of the operator’s duty. The module registers as a consumer of

the data to be stored in the database. Each working operator’s data is

recorded by a separate instance of the Data Logger. Apart from the

raw or processed physiological data, alerts and operator’s voice are

stored. The raw data is supplied by the related Operator Manager

module, whereas the Data Analysis module delivers the processed

data. The voice data is delivered by a Voice Data Acquisition module.

2.4.5 Visualization Module

The module provides user interface for the supervisors. It

enables them to watch each of the working operator’s physiological

condition along with a preview of selected video source and his related

sound stream. Watching all the recorded physiological parameters,

alarms, video and audio data the supervisor is able to reconstruct the

course of the selected operator’s duty.

Features

Some of the features of the Central System Unit are:

• The Bluetooth connection management of the two units.

• Data processing that has been acquired from the mobile device

or the Data Acquisition Unit.

• Visualization of the overall data acquired into an appropriate

format.

• The recording of the data into an external database using OBDC.

• Access verification of an operator, by matching his data with that

in system’s database.

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• The overall maintenance of the system, as to the maintenance of

both the units.

CHAPTER 3 : SECURITY AND APPLICATION AREAS

3.1 SECURITY OF DATA IN THE SYSTEM

There are various levels of security perseverance in the

system. They can be enlisted as follows:

• Only registered mobile devices can connect to the system by

the means of unique ID cards maintained by each individual

operator. When the ID card is inserted in its interface then

there is an authorization process run, and piped to the process

is only the access allowed to the legitimate operators of the

system.

• Whenever a Bluetooth connection is to be established then also

there is an authentication procedure followed by the system to

allow access to only those operators those have a unique

identification and its representation or valid entry in the

database.

• Bluetooth connection encryption is maintained in the system

for authentication purposes.

• Access rights restrictions are also been imposed, so as to

maintain hierarchical structure in networks and to allow limited

access to the operator.

• Personal and physiological data encryption is another facet.

Only the operator and the system know what is its status, no

other intruder cannot have access to personal information.

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3.2 APPLICATION AREAS OF THE SYSTEM

BlueEyes system can be applied in every working environment

requiring permanent operator's attention:

• The system can be used at the power plant control rooms for

monitoring the physiological conditions of the operator who

controls the overall power system.

• at captain bridges

• It can also be implemented in the flight control centers, that

require the continuous monitoring of a human operator for

keeping the track of all flights.

• Medical Application : The anesthesiologists can use the system in

the operation theaters to monitor the physiological condition of

the operator(patient in this case), then accordingly treat the

patient.

• A most common application can be, assuming the operator to be

a driver and the supervised process is car. Through physiological

conditions operator can control movement. Also the system can

monitor conscious brain involvement and warn when necessary.

25

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CHAPTER 4 : MERITS AND DEMERITS

In section gives a brief overview of the merits, demerits

and implementation trade-offs of the system.

4.1 MERITS OF THE SYSTEM

The system is able to

4.2 DEMERITS OF THE SYSTEM

The prototype built has several limitations, which are not

the result of the project deficiency but are rather caused by the

constraints imposed by the Project Kit and small budget. In the

commercial release the USB web-cam should be replaced by an

industrial camera, connected to a capturing device. The use of such a

camera would lessen CPU load and improve the video signal quality.

Since the Bluetooth module does not support redirecting of

the voice SCO connections data to the serial port (which is a part of the

Bluetooth specification) PCM interface is built on the central system

side similar to the one used in the DAU. This makes the Voice Data

Acquisition module receive the sound using the sound card.

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CHAPTER 5 : A GENERIC TOUCH TO THE    FUTURE OF THE SYSTEM

5.1 FUTURE ENHANCEMENTS IN THIS SYSTEM

There lies an immense scope in the improvement of this system.

Rather the commercial implementation of this system holds much

ground in this dynamic era of computer sciences.

• The use of a miniature CMOS camera integrated into the eye

movement sensor will enable the system to calculate the point of

gaze and observe what the operator is actually looking at.

• Introducing voice recognition algorithm will facilitate the

communication between the operator and the central system

and simplify the authorization process.

Despite considering in the report only the operators working in control

rooms, the solution may well be applied to everyday life situations.

• Assuming the operator is a driver and the supervised process is

car driving it is possible to build a simpler embedded on-line

system, which will only monitor conscious brain involvement and

warn when necessary. As in this case the logging module is

redundant, and the Bluetooth technology is becoming more and

more popular, the commercial implementation of such a system

would be relatively inexpensive.

• The system can also be implemented to its optimal level in

various other scenarios like that of in the power plant control

stations to monitor the physiological condition of the operator. As

this system implements a very vivid technology called the

Bluetooth technology, the use of this technology facilitates the

minimization of the cost of implementation of the system and

28

also this system can be utilized by many common end users.

Only the norms and the system architectural design have to be

known to only the systems’ administrator.

• The system can also make use of the Data mining algorithms.

Data mining is the extraction of information from databases. The

use of this technique will increase the efficiency of the retrieval

of information from databases as and when needed and also, for

keeping the track of identification of various operators of system

in the database.

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CHAPTER 6 : SUMMARY

Starting with the name of the system, BlueEyes

emphasizes– Bluetooth technology and the movements of the eyes.

Bluetooth provides reliable wireless communication whereas the eye

movements enable us to obtain a lot of interesting and important

information using the eye motility analysis.

The BlueEyes system is developed because of the need for

a real-time monitoring system for a human operator. The approach is

innovative since it helps supervise the operator not the process, as it is

in presently available solutions. The system in its commercial release

will help avoid potential threats resulting from human errors, such as

weariness, oversight, tiredness or temporal indisposition. However, the

prototype developed is a good estimation of the possibilities of the

final product.

No doubt, there are some lacunas in the system, but these

are present only because the system is developed on the project basis.

This is done only to limit the cost of the system. The commercial

implementation of the system can resolve the lacunas.

In recent years, Bluetooth technology is becoming more

and more popular; the commercial implementation of such a system

30

would be relatively inexpensive. And if a large scale implementation is

done, then such a system will definitely prove to be a boon for the

human race in course of time.

BIBLIOGRAPHY

Books:

• 8051 Microcontroller and Embedded Systems

(for Basics of 8051 family microcontrollers and Serial

Communication Principles)

Author : Mazidi and Mazidi

• Wireless Technology Manual 4.5

(for Basics of Bluetooth Technology)

Websites :

• www.google.com

• www.bluetooth.com

• www.poznan.net

• www.bluemax.com/eyessafe

• www.wikipedia.org

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