Prison Door System

1
Prison Door System

• Scott Cornelsen
• Scott Bingham
• Justin Kautz

2
Mission Statement
3
System Overview
PC
Control Box
Prison Cell Mockup
USB

• Functions
• Door Function Control
• Cell Door Activity Logging
• Passcode Managment

• Physical Features
• LCD Display
• 16-button Keypad
• Functions
• Door Function Control
• Sensor Actuator Interface
• Backup Power Supply Switching Electronics

• Sensors
• Lock Current Monitors
• Open/Close Door Sensors
• Door Position Sensors
• System Power Monitors
• Actuators
• Door Motors
• Electromagnetic Locks
• Security Alarm

4
High-level Block Diagram
4x4 Keypad
Computer GUI via USB port
Computer GUI via USB port
LCD display
4 optical position sensors
Embedded System
Door breach alarm
8 open/close sensors
4 DC Door motors
2 Power Status Signals
4 DC Electromagnetic Locks
4 Lock Current sensors
2 Power Supply sensors
Digital I/O
Analog I/O
5
Prison Cell Mockup
Cell 1
Cell 2
Door Alarm
Cell 3
Cell 4
Position sensor
Closed sensor
Electromagnetic Lock
Open sensor
Lock Current Sensor
12V DC Door Motor
Drive Shaft
12 VDC
6
Power System
Power Supply State Signals
System Power Sensors
Switch Control
Power Supply
12 VDC
120 VAC
To System
5 VDC
12 VDC
5 VDC
Batteries
7
Mid-level Electronics Diagram
Output Latches
Clock Circuit
DC Motors
Motor Drivers
8279
74x138
Micro Controller
Keypad
Mag Locks
Lock Drivers
Power Signals
USB Module
Position Sensors
LCD Display
Pre- Amp
Current Sensors
0808 ADC
Open/Close Sensors
Alarm Driver
Alarm
8
PC Software
Visual Basic - GUI
C - handles all the real computing, logging,
user profiles
To Microcontroller
USB Driver
9
PC uC Communications
uC
PC
Open Door
Close Door
Door Status
Check Security ID
Open Door
Close Door
10
Microcontroller Box Components
Keypad
16
uC
Control Interface
USB Interface
17
Sensors
8
Actuators
LCD Screen
11
Sensor/Actuator Interface
8x8 Sensor Matrix
8279
Open Sensors -push button
Closed Sensors -push button
4x4 Keyboard Matrix
Positions Sensors -optical reflectors
SC
ADC
Lock Sensors -shunt resistors
Power Sensors -passive electronics
See Cell Sensor and Actuator Slide also
12
Sensor/Actuator Interface(continued)
8279
DC Motors
Motor Drivers
4 DACs
Mag Locks
Lock Drivers
13
System Sensors and Actuators
8 Open/Close Sensors
4 Positions Sensors
4 Current Sensors (lock)
1 Current Sensor (power)
8 Open/Close Sensors
8 Open/Close Sensors
1 Alarm
14
Cell Sensor and Actuators