Www.convergencetechnologycenter.org DUE 402356 Security and Fire Alarm Systems LEARNING OUTCOME 7B...
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Transcript of Www.convergencetechnologycenter.org DUE 402356 Security and Fire Alarm Systems LEARNING OUTCOME 7B...
www.convergencetechnologycenter.org DUE 402356
Security and Fire Alarm Systems
LEARNING OUTCOME 7BDescribe design overview and location considerations for home security and fire alarm systems. Outcome addresses learning outcomes 1-4 for these specific technologies.
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Home Security
Home Security Intrusion detection Fire detection Smoke detection
Installation New Retrofit
Options Wired Wireless
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Zones
Just like audio/video zones Security System zones
Location of sensors Important
How zones are setup Door sensors Window sensors
Zones important Multiple security zones Keeps track of alarms
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Zone
Multiple windows or doors = zone Zone 1
Dining room Living room
Zone 2 Master bedroom
Zone 3 Front door Back door
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Zones
Zones transfer info to controllers Status
Power Line failures Telephone system problems System tampering Low batteries
Type Wired Wireless
Difference is how signal is transmitted
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Zones
Every circuit = zone = 1 device Room
2 door sensors 2 passive infrared receivers
= total of 4 security zones
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SubZones
Another circuit 1 zone = 1 circuit = 1 device
Another circuit connects to above circuit If subzone goes off
Controller can’t tell if zone or subzone or zone has triggered alert
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NC and NO
Configuration of systems NC
Normally closed System is armed Open NC area and alarm gets triggered
NO Normally open
Area is open If NO closes then it triggers alarm
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Fire Systems
Advance security systems Smoke detectors Carbon monoxide detectors
Detects Fire Smoke Heat
Components Fire alarms Smoke detectors Heat sensors
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Smoke Detectors
2 Types Ionization chamber detector
Produces molecules charged with electricity Smoke attach to ions Electrical current stops
Triggers alarm Photoelectric Chamber
Light Source Light sensitive receiver Alarm
Light cannot get in Smoke can get in Smoke scatters light inside Scatter light produces more light
Triggers alarm
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Smoke Detectors
Power Batteries
A year without changing If hear short beeps > change batteries
AC If power fails
Alarm fails
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Heat Detectors
Uses metal Metal units when heat enters air around it Alarm goes off
For Configuration check local codes or National electrical code. For installation check manufacturers website
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Video surveillance
In house CCTV
Closed circuit Television Set cameras in different parts of house Video available to specific channel Video can be recorded
Tape VCR PVR
Internet Connect to house and view image Image sent to e-mail
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Monitoring
Monitor environment Video surveillance Lighting for security
Use sensors Photo cells
Turn lights on evening Not enough light is received so it turns lights
Motion detectors Movement received
Triggers video recording Or turn lights on or flood lights
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Wired Systems
Low voltage telecommunications Connects to main alarm
Doors Windows Sensors
Features Reliability
Can run with batteries Efficiency
Alarms is always connected to central system It works
Wired systems have always been used Availability
Many manufacturers make them
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Wireless Systems
Easy to install and use Portable No wires Low installation cost
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Remote Access
Manage system from anywhere Secure security system
Not too much integration with home network No one else can connect to it
Internet Web browser
Login and change system configuration Connects to home network Access cameras
Which system to use or buy? Not all systems allow connection from Internet
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Components
Security control Panel Center of security Interface with home network is important Controls everything
Sensors Keypads Working Devices
Security Cameras CCTV Important factors
Resolution Sensitivity
Monitor and Switches Switches used with multiple cameras Changes picture from one camera to another
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Components
Keypads Interface with security system Arm/disarm system Change state of system Zone that has triggered alarm appears in keypad
# number = 22 = zone 22 etc.
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Sensors
2 common sensors PIR
Passive Infrared Sensors (Motion sensors) Smoke detectors
Types Contact sensors Glass break sensors
Detects sounds Motion sensor Flood sensor
In basements Carbon monoxide - CO
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Questions: Feel free to contact the creators of this material
Julian Carranza, [email protected] Mike Harsh, [email protected]
This material is based upon work supported by the National Science Foundation underGrant No. 0402356. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation