Transcript Design Review Slides

Entrance Security
System
Group Dec 07-07
April 25th, 2007
Project Team Information
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Team Members
 Nahiyan Ali, EE
 Shrabantee Chatterjee, EE
 Vaibhav Kumar, EE
 Alex Weigel, EE
 Tao Zeng, EE/Math
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Advisor
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Dr. Mani Mina
Client
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Dr. Gregory Smith
Selected Definition
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Driver - Software or hardware that controls the interface between a
computer and a peripheral device.
FCC – Federal Communications Commission
I/O – Input/Output
Interface board - A device that enables communication between devices
ODBC – Open database connectivity
RAM – Random access memory
RFID - Radio Frequency Identification
RS-232 – Computer serial port interconnect
SDK – Software Development Kit
Transponder - A radio, radar, or sonar transceiver that automatically
transmits a signal upon reception of a designated incoming signal.
Problem Statement
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Create a security system for the Senior
Design Lab that meets the following
requirements:
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Allow access to authorized personnel only
Prevent multiple entry
Operating Environment
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Designed for indoor use
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Temperature: 65°F to 75°F
Relative humidity: 10% to 90%
Illumination: (Typical)
Intended User(s)
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Students enrolled in EE491 and EE492
Faculty
Custodial Staff
Intended Use(s)
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Improve the current security of the Senior
Design lab.
Prevent unauthorized entrance to the lab by
triggering an alarm.
System may be extended to other buildings
and rooms as requested by the client.
Assumptions
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Constant power
RFID cards only distributed to authorized personnel
Tampering is not expected.
The camera installed in the room is expected to handle students
triggering the alarm intentionally.
Suitable mounting place for the device in the Senior Design Lab.
Total user(s) weight less than 300 pounds.
User(s) is not carrying any extra personal belongings
Limitation
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Range of RFID tag from the transmitter
AC power outlets in lab are 120V, 60Hz
The project has a budget constraint of $250
Interface board inputs
Number of team members
Deadline by December 2007
Expected End Product and other
deliverables
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Mountable wall unit
Power supply unit
Installation instructions and user manual
Instruction pamphlet for authorized users
Logic and control software
Computer input/output interface board
Authorized RFID cards and compatible RFID scanner
Weight sensor detection
Design report
Project poster
Final report
Design Objective
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Hardware
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Software
Hardware Objectives
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Select a pre-built interface board with the following
characteristics:
 One USB port capable of data transfer and power
distribution
 6 analog input ports
 6 digital input ports
 Programmable in an object oriented language such as C#
or Java
Design a sensor system to determine the state of the two
doors (open/close)
Design a case to hold the pre-built interface board and wire
routing
Software Objective
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Develop utility software to do the following:
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Driver to communicate between the interface board
and the PC
Process analog signals from sensors being routed to
the interface board
Database to store authorized users’ information
ODBC driver to communicate between database and
PC
Trigger an alarm in an event of security breach
Design Constraints
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Range of RFID
Weight scale limit
Physical size
Database size
Cost
Detail Design
Compartment built inside the Senior Design Lab which includes
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Door 1 (Hallway door)
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Door 2 (Lab/Compartment door)
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Weight Scale (Used for multiple entry)
Block diagram of the general
system
State Flow of entrance system
System flow of exit system
State flow of the general
system
RFID
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Texas Instruments Low Frequency
Micro Evaluation Kit Part Number: RIK3A-001A
S2000 Micro Reader RI-STU-MRD1
mounted on an interface Board with
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RS-232 IF Port
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Power Connector
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Antenna Connector
Antenna
9-Pin Sub-D Cable (Female – Female
connector)
Various Transponder Samples
CD With User Documentation and
Demonstration Software
Getting Started Guide
9V Power Supply Input 100V-240V,
1.5A
Weight Sensor
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Researched several different options
Digital weight scale
Resistance weight scale
Resistive material weight scale
Weight scale with RS-232 or USB interface
Weight Sensor (continued)
Digital weight
scale
Resistance
weight scale
Cost
Accuracy
Reliability
Drawbacks
$75
High
High
No means of extracting
output reading
$40
Medium
Low
Too many resistor
connections
Resistive
material
weight scale
$50
Low
Medium
Load cell weight
scale
$120
High
High
May not be accurate
over a small weight
change
High cost
Interface board
Interface Board (continued)
Door Sensor
Software
Flow Chart of the entrance
security system
Start
Close Door 2
Yes
Door 1
open?
No
Yes
Door 2
open?
No
Read RFID #
Trigger
Alarm
No
RFID #
Match
Yes
Open Door 1
Read Weight
No
Door 1
Closed &
Weight
match
Yes
Open Door 2
Driver Module
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This module will be used by the decision-making block to
communicate with the interface board, the RFID reader, and the
database. This module provides functionality for hardware such
as interface boards, serial ports, and databases. The device
driver communicates on behalf of the user program. As the flow
chart in figure 15 indicates, the team will use two different types
of drivers, namely (1) Hardware drivers and (2) Database driver.
Hardware drivers will interact from the external hardware; while
the database driver will allow read/write access to the internal
database.
Database Module
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The database shall contain the following:
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User’s Name
User’s Weight
User’s RFID tag number which will be an 8-bit
binary code
Evaluation Criteria
Functionality
Relative important
Evaluation Score
Resultant Score
RFID reader and tag
15%
86.66%
13%
Weight Scale
15%
80%
12%
Door Sensor
10%
100%
10%
Database
15%
66.66%
10%
Interface Board
20%
90%
18%
Compartment
2%
50%
1%
Software Drivers
15%
66.66%
10%
Alarm
5%
80%
4%
Personal Computer
3%
100%
3%
Total
100%
82%
Question????