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Conclusion

Tool Bar Menu. Visualization. Node List. Microphone Level. Time.

timothy-hanson
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Conclusion

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  1. Tool Bar Menu Visualization Node List Microphone Level Time Wireless Sensor Module for Structural Health Monitoring of Composite Structures in AircraftsGroup 3: Hourieh Fakourfar , Gavrilinos Gavrielides , Charles YiSponsors: Spirit Aerosystems, Inc. & CEAM/UCSD Faculty Advisor: Das Pankaj • Result and Status • Successfully integrated the pre-existing wired sensor system with wireless MICAz motes, which are based on IEEE 802.15.4/ZigBee standards operating at 2.4GHz ISM band. • -Checked the physical characteristics of the network as well as monitoring the collected acoustic data via MoteView. • - By filtering the higher frequency trends of the output signal, we showed that some data of the incoming acoustic signal can be captured and transmitted to the local host when an "event" of interest has occurred, rather than the overall signal's magnitude and energy. Objective Design and implement a wireless sensor network (WSN) using IEEE 802.15.4/ZigBee protocol compliant RF transceiver motes (WSM) to wirelessly collect real time data from four acoustic emission sensors that will detect and localize potential material fractures on an airplane and report the problem to a local host. Approach & Methodology - Installed and used MoteView to obtain incoming acoustic levels. - Designed a low-pass filter in order to sample at low enough frequencies that MoteView can utilize. - Integrated pre-existing wired sensor module with wireless ZigBee motes in order to send data wirelessly. Background - We were provided with a 12inch x 12 inch panel with 4 embedded PVDF sensors and 4 charge amplifiers with rectifiers on a breadboard as previously designed by CEAM. Each PVDF sensor produces an analog signal that is centered at ~150 kHz. - A wireless sensor module (WSM) contains an embedded microprocessor (MCU), an analog-to-digital converter (ADC), a IEEE 802.15.4/ZigBee (i.e. RF transceiver), and an evaluation sensor board. Conclusion Wireless ZigBee modules mounted on acoustic sensors are wirelessly able to stream acoustic data to a local host allowing a user to identify a disturbance in composite materials.

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