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Andres Felipe Gomez Casseres E

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Presentation Embeddeability

Sensors Power Harvesting Future Work

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Andres Felipe Gomez Casseres E.

5th year Electronic Engineering at Universidad Distrital

Francisco Jose de Caldas, Bogota

Specializations Lines

Telecommunications (1,5 years)

Control (1,5 years)

IT Technician Degree

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WSNs for Helicopter BladesVibration Monitoring

Strong interaction betweenmechanical and electronics

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Define the design parameters for developinghighly embedded vibration monitoring systems

using wireless sensor networks

Low power Embeddeability Performance

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http://www.youtube.com/watch?v=JvD-wD9I1bI

http://www.youtube.com/watch?v=JvD-wD9I1bIhttp://www.youtube.com/watch?v=JvD-wD9I1bIhttp://www.youtube.com/watch?v=JvD-wD9I1bIhttp://www.youtube.com/watch?v=JvD-wD9I1bI

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What is the relevance of the following attributes inWSNs?

Required polarization Transducer Principle

Circuits- Signal Conditioning

Reliability

Linearity

Embeddeability

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GENERATIVE

Based on the piezoelectric

effect. Direction Sensitivity D31, D32, D33, D34, D35,

D36

CAPACITIVE

Proof mass sensor Force is measured by position Acceleration depending

capacitor

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MEMS

Capacitive Generative

Accelerometers

Tactile sensors

ProximityGyroscopes

Accelerometers

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Piezoelectric sensor

Internal polarization

Can measure force and

torsion variables.

Sensitive to differentdirection inputs

Capacitive accelerometer

External polarization

Conditioning needed

F->V

Differential allows linearrelation V->m/s

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Low Frequencies Capacitive High Frequencies Generative

Sensitivity

S/N

Frequency Range : Influence of resonance frequency

Dynamic range

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Rotor (MACRO)

Sensing during flight

Different type of quantities Torsion (shear), deformation (strain),

displacement, rotation and rotational trigger

Different operational range

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Blade (MESO)

Sensing on Ground

Modal Analysis

Strain, displacement

Low freq

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Initial point: A helicopter rotor blade Augmented withpiezoelectric patches by P. de Jong

Circuits

Comparison parameters

Analysis

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Simulation through MATLAB programVerification through Simulink

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Synergy with Power Harvester Circuits

Generative: Possible common transducer

Sensor function asks for linear operation Harvester calls for voltage rectification (power

conditioning)

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Model and simulate a setup that includes theinteraction of the blade with the sensor

Developing a methodology for vibrationsensor calibration Define design criteria for embeddeability Establish quantification parameters for rotor

blade application (Macro/ Meso)