integrated burglar alarm system · an integrated burglar alarm system is installed to monitor for...
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INTEGRATED BURGLAR ALARM SYSTEM
PROJECT INDEX PRJ 079
presented by
WAITHAKA STEPHEN WACHAIYU
F17/2362/2005
Supervisor: Dr. G. KAMUCHAExaminer: MR. V.DHARMADHIKARY
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OBJECTIVE
The problem definition required an in-depthstudy regarding integrated burglar alarmsystems.The alarm was designed to go on due to any of
the following conditions which are monitoredon PC: entry of burglar, door is opened anddoor handle is locked.
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project scope
To design a motion detector.To design a circuit to indicate whether the
door is open or closed.To design a circuit to detect the touching of
the door handle.To develop software for the PC which will
indicate with the entry of burglar, door isopened and door handle is locked.
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Introduction
An integrated burglar alarm system is installed tomonitor for any intrusion into unauthorizedpremise. . The desired output of your burglar alarm system
causes a specified alarm output and quicklyresponds whenever the sensors identify validconditions which have activated the alarm. The unit’s ability in communicating back to its
monitoring system is truly a crucial aspect fordetermining the efficiency of the alarm.
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Types of motion sensors
Passive infrared sensors(PIR)Work by detecting heat emitted by people or objects
Ultrasonic detectorsThe active ultrasonic sensor is a motion detecting device thatemits ultrasonic sound energy into a monitored area andreacts to a change in the reflected energy pattern.
Microwave sensorsSensors generate an electromagnetic (RF) field betweentransmitter and receiver, creating an invisible volumetricdetection zone.
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Types of motion sensors Photoelectric sensors
Photoelectric beam sensors transmit a beam of infraredlight to a remote receiver creating an ‘electronic fence’.
Dual technology detectorsDual technology uses a combination of both microwave andpassive infrared technology in combination with AND logicto provide a lower false alarm rate (FAR) sensor than eitherof the sensor independently
Active infrared sensorsMost infrared cells use cadmium sulphide or cds cells to
detect infrared radiation.
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Magnetic contacts.
Magnetic contacts are used to sense when adoor or window has been opened. Contacts can be surface mounted on a door
or window or flush mounted so that they canbe concealed when the door or window isclosed
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Mechanical switches
Mechanical switches detect the opening of aprotected door or window using mechanicalcontact switches, which are spring-loaded totrigger an alarm when a door or window isopened.
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Design
The programming language used visualbasic.Passive infrared sensors(PIR) was chosen.The software used was visual studio.The mechanical switch used was
pushbutton switch.
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Passive infrared sensors (PIR)
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CIRCUIT DESIGN
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Software design
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TEST AND RESULTS
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CONCLUSION This project was set out to realize an
integrated burglar alarm system that could bemonitored on PC. The project was implemented and
determined to be functioning correctly for themonitoring of the three conditions as laid outin the objectives.
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RECOMMENDATIONS AND FUTURE WORK
Using wireless instead of hard-wired.Using a USB port instead of parallel port.Mobile phone can be used to monitor.