Collaborative Processing in Sensor Networks Lecture 8 – MSP 101 Mahmut Karakaya, Graduate Assistant Electrical Engineering and Computer Science University.

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Presentation transcript:

Collaborative Processing in Sensor Networks Lecture 8 – MSP 101 Mahmut Karakaya, Graduate Assistant Electrical Engineering and Computer Science University of Tennessee, Knoxville Lecture Series at ZheJiang University, Summer 2008

2 What is MSP? M obile S ensor P latform  Mobility  Integrated capabilities of sensing  On-board processing capability  Wireless communication  Cost-effective

3 History of MSP Design  MSP v1.0 - Spring 2004  ECE491 Design Project (Visionaries)  MSP v2.0 - Fall 2005  MS thesis by Chris Beall  Adding Ranging Sensor  MSP v2.5 - Spring 2006  ECE692 Design Project by Austin Albright  Adding a Servo for the range Sensor  MSP v3.0 - Summer 2008  Standardized all works  Adding a Servo for the camera

4 History of MSP Design

Dimension: 300x400x200 cm Cost: ~ $500 each Battery Life: ~ 3 hours 1.5 GHz processor 1 GB of RAM 30 GB Harddisk Operating system: Linux System Facts

MSP is equipped with two kinds of sensors –Imaging sensor –Logitech Pro 5000 –Range sensor –Ultrasonic rangefinder SRF05 Sensing Units

Mini-ITX (7x7in) form factor motherboard - VIA CN GHz processor Room for one memory module Integrated video, audio, ethernet PCI expansion slot (used for wireless) Needs an external Power Supply Processing

Motor Control The parallel port is used to send a PWM signal to the H-Bridge IC which directly drives two motors

Range Sensor & Servo Control SRF05 Ultrasonic Ranger –The parallel port is used. –Input: Power & Trigger signal –Output: Echo signal –Range: 3cm - 4m HITEC HS-311 Servo –Turns: 180 degree Servo Controller Circuit –Digital Potentiometer –556 dual timer IC

10 Software Operating System: Linux –Ubuntu 7.04  Ubuntu 8.04 Wireless Card Driver –To be supported by Linux, or –use Ndiswrapper Remote Access protocol: SSH Secure Shell –Log into a remote machine and execute commands –File transfer Camera –To be supported by Linux, –Use Logitech, DO NOT use Microsoft

11 Projects & Demos Component testing – Motortest – Range Sensor Test Self-localization demo – Using ARTool Kit Parallel dancing demo –Class project demo from ECE453, Fall 2005 Target recognition demo –Class final project demo from ECE692, Spring 2004 Self-deployment demo - Distributed vs. Centralized –Chris Beall's MS defense demo, Summer 2006

12 Component Testing Motor Test Range Sensor Test

13 Self-localization demo –Using ARTool Kit

14 Parallel dancing –Class project demo from ECE453, Fall 2005

15 Target recognition Class final project demo from ECE692, Spring 2004

16 Self-deployment Centralized vs. Distributed –Chris Beall's MS defense demo

17 Power Consumption of MSP Power OFF (Sleep Mode) – A ( W) Power ON (Idle Mode) –1.82 A (21.84 W) Data Send/Receive –1.92 A (23.04 W) Motors –Both: 2.22 A (26.64 W) –Left: 2.07 A (24.84 W) –Right: 2.01 A (24.12 W)

18 Questions & Future Work DC motors are not identical so feedback control is needed. Can step motor be used? Fix the problem in servo control circuit. Can smaller battery be used? Is MSP too big? Why not make it smaller? More info: