Wireless Sensor Module for Structural Health Monitoring of Composite Structures in Aircrafts

1
Group 3

• Wireless Sensor Module for Structural Health
  Monitoring of Composite Structures in Aircrafts
• Sponsors Spirit AeroSystems, Inc.
• UCSD/CEAM

Advisor Jon Isaacs Team Members Hourieh
Fakourfar Gavrilinos
Gavrielides Charles Yi
Week 6-Project Review
2
Agenda

• Statement of Work
• Progress Report
• Technical Details
• Future Work

3
Statement of Work

• Design and implement a wireless sensor network
  (WSN) that monitors the physical conditions of
  different parts on an aircraft such as fractures.

4
Accomplishments

• Compared potential manufacturers
• Data acquisition
• Data analysis
• Obtained components
• Experimented with sensor board MTSCA310
• Configured WSN using MoteView
• Got the network up and running

5
Sensor Board Configuration
6
(No Transcript)
7
Analysis of Previous Slide

• The previous slide shows channel D has the
  highest peak in voltage due to the fracture being
  closest to its corresponding acoustic sensor
  (Sensor 4)
• Channel A has the lowest voltage since it is
  furthest away from the fracture.

8
(No Transcript)
9
Observations of Previous Slide

• The previous slide shows the comparisons between
  trial 1 and trial 2 for the same channel (Channel
  A)
• The first trial (in blue) shows a higher peak due
  to a harsher fracture
• The second trial (in red) shows a more spread out
  density due to a less severe fracture

10
WSN Objective

• This system will detect and localize potential
  material fractures on an airplane using acoustic
  sensors, microcontrollers, and reports the
  problem using a wireless sensor module (WSM) via
  ZigBee.

11
Block Diagram of Wireless Sensor Node
12
ZigBee (802.15.4) Features

• Low power operation (2.7 - 3.6 VDC)
• Supports Star, Tree, and Mesh technologies
• Supports 65,000 devices within a mesh network
• Raw data rate of 250Kbps
• Transmits up to distances of 1 km
• Operates in the 2.4GHz frequency spectrum

13
Project Components

• MICAz Wireless Mote (4)
• Serial Gateway-MIB510 (1)

• MTS-CA101 Sensor Board (4)
• MoteWorks Software Platform

WSM Sensor Clusters
Wireless Base Station
14
MICAz Wireless Mote

• 2.4 GHz IEEE 802.15.4, Tiny Wireless Measurement
  System
• 250 kbps, High Data Rate Radio

http//www.xbow.com/
15
Serial Gateway - MIB510

• Base Station for Wireless Sensor Networks
• Provides an RS-232 serial programming interface
  for MICAz
• Power
• 5V _at_ 50mA using external power supply
• 3.3-2.7V _at_ 50mA using Mote batteries

http//www.xbow.com/
16
MTS-CA101 Sensor Board

• The MTS101CA series sensor boards have a
  precision thermistor, a light sensor/photocell,
  and general prototyping area. The prototyping
  area supports connection to five channels of the
  Motes analog to digital converter.

http//www.xbow.com/
17
WSN Setup
18
WSN Topology (Idle)
19
WSN Topology (With Sound)
20
Explanation of Network Topology

• Topology of the WSN shows the general layout of
  the network and concentration of sound or other
  sensed information.
• First topology shows sensors detection of noise
  with no audio inputs.
• Second topology shows a high concentration of a
  red cloud around sensor 2 due to an audio input
  closest to that sensor.

21
Future Work

• Capture signals/data and transmit to a host (PC)
  to show that an event has occurred at some time,
  as opposed to knowing the exact time and
  frequency of occurrence due to limitations such
  as ADC speed and ZigBee 802.15.4 transmission
  rate
• Create a low pass filter to analyze data
  pertinent the system (using MTSCA101 sensor
  boards)
• White paper

22
Gantt Chart
23
Questions and Answers

• ?