The Voice Operated and Wirelessly Controlled Elevator Jeremy Hester Advisor: Dr. Mohammad Saadeh Class: ET 494 (Senior Design II), Fall 2013 Class Professor: Dr. Cris Koutsougeras Southeastern Louisiana University Computer Engineering Technology 1

The Purpose and the Idea: Purpose: To build an elevator that can accept voice commands wirelessly. The Idea: To make the usage of an everyday elevator more accommodating in especially cramped situations and less of an ordeal in humility for those physically handicapped. 2

Major Components The System ◦Four Microcontroller Boards ◦Two to Four Wireless Modules ◦A Voice Recognition Module and Microphone The Model ◦A Frame ◦An elevator Room ◦A Floor Detection Sensor used for automatic calibration linked to a seven segment LED display ◦One Geared Stepper Motor 3

The Preliminary Design 4

The Final Design 5 Main changes include: 1.Transformation from metal rods to wooden components 2.The addition of six floors for the sake of presentation 3.Installing larger support at the top for the motor.

The System 6 Transmitter Side Receiver Side

System Logic 7 Start System at Rest Enter Voice Command Transmitter Sends out Desired signal Start System at Rest System Receives Signal Is Signal greater or less than current floor Yes No Move Room Up the Necessary Predetermined / Calculated Rotations Move Room Down the Necessary Predetermined / Calculated Rotations Room Stops at Sensor Detected Floor Door Opens and Closes Voice Transmitter Device Elevator Receiver Moves to Home Position

Subsystems 1.Transmitter system (transmitting station) EasyVR module with microphone XBee wireless module Controller (Arduino Uno) 2.Room lifting system (receiving station) Actuator (motor) XBee wireless module  Controller (Arduino Mega)  3.Door opening system (receiving station) Actuator (motor) XBee wireless module  Controller (Arduino Mega)  4.Digital display system (receiving station) XBee wireless module  Controller (Arduino Mega) 

Transmitter System: Easy VR Module and Microphone 9

XBee Wireless Modules 10 XBee Explorer Mount XBee Series 1 Wireless Module Arduino XBee Specific Wireless Shield

Room Lifting System 11 Uni-polar Stepper motor DC motor with Incremental Optical Encoder Bi-polar Stepper motor 12 Volt Geared Bipolar Stepper Motor with a gear ratio of 1:27

Sliding Door System 12

Seven Segment Floor Display 13

Transmission 1 Arduino Uno 1 XBee Reception 3 Arduino Uno 3 XBee The Arduino Boards Replaced with 1 Arduino Mega 1 XBee For Simplicity

Sample Codes 15

Challenges of Project Identifying room lifting actuator: ◦Accuracy of DC motor is weak, no feedback, easy to control ◦Geared DC motor provides good holding torque, overshoots position ◦Bipolar stepper provides precise motion, too much control Calculating the torque required to move the room up and down, and hold it at fixed position. Weight was an issue. Synchronizing the stepper motor shaft rotations to stop the room precisely at the designated floors. 16

Challenges of Project Designing and Soldering the various circuits needed to run the system. Improving the acceptance of the Voice Recognition Module to accept more than one individual’s voice. Integrating all hardware and software components using a single transmission / single reception embedded system. 17

Timeline April 13: Testing of XBee modules:  April 20: Construction of Initial Frame Design:  April 21: Gear Motor Selection:  April 27: Complete Gear Motor Selection and Begin Testing:  May 03 : Testing and Configuring The EasyVR modules:  May 08 : Make Adjustments to Final Proposal:  May 10 : Final Senior Design I Proposal and Presentation:  Sept 12: Complete Stepper Motor Testing:  Sept 27: Complete Reconstruction of the new Frame Design:  Oct 11 : Research and Increase Acceptance of Voice Module:  Oct 18 : Door Motor Selection and Testing:  Nov 1 : Integration of Individual Components Nov 8 : Testing of the System Nov 11 – Dec 5: Make Adjustments and Improvements as necessary Dec 06: Final Senior Design II Presentation 18

Accomplishments Developed a wireless communicating system. Acquired skills and knowledge about different types of motors, modules, and embedded systems. Constructed a simple prototype for demonstration. 19