11-09-2014, 03:44 PM
Electric Field and Ultrasonic Sensor Based Security System
[attachment=67847]
Abstract
This paper proposes an inexpensive solution towards
the safe-keeping of the precious artifacts in museums, art
galleries and private collections by employing an innovative
non-contact based sensing mechanism clubbed with some of
the previously used, well tested and efficient sensor-networks
based on physical parameters. Such security standards are met
by covertly deploying a low level electric field, with intent to
perceive any intrusion by the trespasser for a visual or audio
alert. Further, it explains how this system incorporates with
other sensing devices such as ultrasonic sensors and the control
units like microcontrollers and processors to deliver a fail-safe
security system
INTRODUCTION
Securing artifacts of incalculable worth has been an
arduous task for public museums and galleries. These
institutions cope with a conflicting dilemma of keeping
objects safe, yet permitting millions of visitors to observe
them; which leads to nothing else than an conundrum
regarding the security of these valuables. Undoubtedly, art
theft is among the highest rated crimes in the world as it
deals with the world’s highly appraised possessions like
paintings, jewelries and other valuables. A few systems,
namely, Closed Circuit Television (CCTV) [1], laser fence
[2], temperature, biometric [3-4], touch [5-6], pressure
sensors act as the primary equipments with a worldwide
usage. However, they have significant shortcomings in their
practical implementation and use.
The restricted angle for CCTV cameras invariably leaves
some portions unexplored. Laser sweepers and trackers have
a downside that they can be duped by the advanced glasses
which help in locating the lasers. Other sensors like
temperature, biometric, touch and pressure sensors are
specifically employed for the places inaccessible to the
masses with minimal human-system interaction, such as
vault, and therefore may have limited applications for the
proposed purpose.
DESIGN CONCEPT
The basic working principle of the system proposed is
based on generation and detection capabilities of the IC
MC33794 and ultrasonic sensors. MC33794 generates a
low-level electric field and uses feedback to detect the
presence of objects resulting into a non-contact based
mechanism. To implement the desired results we lay out a
grid of plates producing electric field which is shown in the
Figure1 (a). There are four control lines (A, B, C, and D)
that represent the Binary Coded Decimal (BCD)
representation of the sensing electrodes (E1 to E9), along
with the selection of the Ref_A and Ref_B pins, among
other selections as shown in Figure2. By toggling the A, B,
C, and D selection lines, we are able to select the sensing
electrodes whose electrical potential is to be detected. Only
one electrode is selected at a time for processing, although
the order of electrode selection and the amount of gain for
that electrode is up to user. For continuous checking of the
values returned by the electrodes we can program the
microchip as per requirements. When a disturbance is
detected the resultant is passed on to the microprocessor
which, in turn directs our camera to the anticipated
location, also the alarm would be activated and any other
traps would come into motion. This raises a question of
Triggering due to false conditions, So as to lessen the
probability of false alarms we collaborate with the readings
from other physical and biometric sensors
WORKING PRINCPLE OF THE PROPOSED SYSTEM
CONTROL SYSTEM
Microcontroller is the main logical part of the device
which processes the signals which are send to it once the
sensing is done by the electrodes. The logic defined in the
controller is responsible for the activation of all the alarms
and other sensors. The calibrated data from both the
ultrasonic and the electric field sensor is fed into the
microcontroller. Figure 5, explains the working of the
system through the use of a flow chart.
APPLICATION OF THE PROPOSED SYSTEM.
MUSEUMS and ART GALLERIES.
The above referred system would be applied mainly to
the roof section and the ventilation section of the museums
and art galleries as these places are inevitably used by the
intruders. At these places there is a very minimal amount of
external electric field interference, thus any kind of
disturbance would be easily sensed. Further they can also be
inserted in the restricted places such as adjacent to the
artifacts and other valuables. As soon as there is any
intrusion, alarm will blow off indicating that there is an
attempted trespassing or theft.
CONCLUSION AND FUTURE SCOPE
This paper happens to be one of the most innovative
ideas with high feasibility and focuses on the application of
electric field sensing and ultrasonic sensing to design a
fail-safe security system. The future scope of this paper is
beyond all the above elucidated applications,
As the sensors can be used for sensing where any kind of
check is anticipated. Advancement in the electric field
sensing clubbed with ultra sonic sensor could lead us to
entirely new horizons of non touch based keyboards as they
could provide a complete 2-d coordinates of the element
creating the disturbance.
If we could make our device precise enough then we can
use all the keys of the "qwerty" keyboard without even
touching it. We can also use these types of locks where we
want our codes to be entered as the persons will just have to
move the fingers in the field thus helping us to keep the
locks more secure. Another horizon in which these could
find a variant application is the field of the zoology where
these could be used as the presence and movement sensing
device and thus we would be able to monitor the exact
movements the animals in the restricted area
[attachment=67847]
Abstract
This paper proposes an inexpensive solution towards
the safe-keeping of the precious artifacts in museums, art
galleries and private collections by employing an innovative
non-contact based sensing mechanism clubbed with some of
the previously used, well tested and efficient sensor-networks
based on physical parameters. Such security standards are met
by covertly deploying a low level electric field, with intent to
perceive any intrusion by the trespasser for a visual or audio
alert. Further, it explains how this system incorporates with
other sensing devices such as ultrasonic sensors and the control
units like microcontrollers and processors to deliver a fail-safe
security system
INTRODUCTION
Securing artifacts of incalculable worth has been an
arduous task for public museums and galleries. These
institutions cope with a conflicting dilemma of keeping
objects safe, yet permitting millions of visitors to observe
them; which leads to nothing else than an conundrum
regarding the security of these valuables. Undoubtedly, art
theft is among the highest rated crimes in the world as it
deals with the world’s highly appraised possessions like
paintings, jewelries and other valuables. A few systems,
namely, Closed Circuit Television (CCTV) [1], laser fence
[2], temperature, biometric [3-4], touch [5-6], pressure
sensors act as the primary equipments with a worldwide
usage. However, they have significant shortcomings in their
practical implementation and use.
The restricted angle for CCTV cameras invariably leaves
some portions unexplored. Laser sweepers and trackers have
a downside that they can be duped by the advanced glasses
which help in locating the lasers. Other sensors like
temperature, biometric, touch and pressure sensors are
specifically employed for the places inaccessible to the
masses with minimal human-system interaction, such as
vault, and therefore may have limited applications for the
proposed purpose.
DESIGN CONCEPT
The basic working principle of the system proposed is
based on generation and detection capabilities of the IC
MC33794 and ultrasonic sensors. MC33794 generates a
low-level electric field and uses feedback to detect the
presence of objects resulting into a non-contact based
mechanism. To implement the desired results we lay out a
grid of plates producing electric field which is shown in the
Figure1 (a). There are four control lines (A, B, C, and D)
that represent the Binary Coded Decimal (BCD)
representation of the sensing electrodes (E1 to E9), along
with the selection of the Ref_A and Ref_B pins, among
other selections as shown in Figure2. By toggling the A, B,
C, and D selection lines, we are able to select the sensing
electrodes whose electrical potential is to be detected. Only
one electrode is selected at a time for processing, although
the order of electrode selection and the amount of gain for
that electrode is up to user. For continuous checking of the
values returned by the electrodes we can program the
microchip as per requirements. When a disturbance is
detected the resultant is passed on to the microprocessor
which, in turn directs our camera to the anticipated
location, also the alarm would be activated and any other
traps would come into motion. This raises a question of
Triggering due to false conditions, So as to lessen the
probability of false alarms we collaborate with the readings
from other physical and biometric sensors
WORKING PRINCPLE OF THE PROPOSED SYSTEM
CONTROL SYSTEM
Microcontroller is the main logical part of the device
which processes the signals which are send to it once the
sensing is done by the electrodes. The logic defined in the
controller is responsible for the activation of all the alarms
and other sensors. The calibrated data from both the
ultrasonic and the electric field sensor is fed into the
microcontroller. Figure 5, explains the working of the
system through the use of a flow chart.
APPLICATION OF THE PROPOSED SYSTEM.
MUSEUMS and ART GALLERIES.
The above referred system would be applied mainly to
the roof section and the ventilation section of the museums
and art galleries as these places are inevitably used by the
intruders. At these places there is a very minimal amount of
external electric field interference, thus any kind of
disturbance would be easily sensed. Further they can also be
inserted in the restricted places such as adjacent to the
artifacts and other valuables. As soon as there is any
intrusion, alarm will blow off indicating that there is an
attempted trespassing or theft.
CONCLUSION AND FUTURE SCOPE
This paper happens to be one of the most innovative
ideas with high feasibility and focuses on the application of
electric field sensing and ultrasonic sensing to design a
fail-safe security system. The future scope of this paper is
beyond all the above elucidated applications,
As the sensors can be used for sensing where any kind of
check is anticipated. Advancement in the electric field
sensing clubbed with ultra sonic sensor could lead us to
entirely new horizons of non touch based keyboards as they
could provide a complete 2-d coordinates of the element
creating the disturbance.
If we could make our device precise enough then we can
use all the keys of the "qwerty" keyboard without even
touching it. We can also use these types of locks where we
want our codes to be entered as the persons will just have to
move the fingers in the field thus helping us to keep the
locks more secure. Another horizon in which these could
find a variant application is the field of the zoology where
these could be used as the presence and movement sensing
device and thus we would be able to monitor the exact
movements the animals in the restricted area