Piezoelectric Pressure Transducer R

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    PIEZOELECTRIC

    PRESSURE

    TRANSDUCER

    Karen BastidasDiana Gaitn

    Diego RaAna Ruz

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    GO TO .

    CONCEP

    TS

    INTRODUCT

    ION

    EFFECTMATERIA

    LS

    APPLICATIO

    NS

    PARTS

    ADVANTA

    GES

    DISADVANTA

    GES

    !

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    ETHIMOLOGY

    Piezo is derived from theGreek word piezein, tosqueeze.

    Piezoelectric materials

    produce a voltage whenstrained.

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    TRANSDUCER

    A device that converts a signal from a signalcorresponding physical form but otherwise physicallydifferent.

    Pressure

    Voltage

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    PRESSURE

    TRANSDUCERSensor

    Electrical signals

    Measure

    pressure

    Acceleration

    stress

    force

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    PRINCIPLE OF

    OPERATION

    Coil

    Condenser

    Resistance

    Voltage source

    The voltage is directlyproportional to the force,pressure.

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    PIEZOELECTRIC

    EFFECT

    Discovered in thenineteenthcentury byJacques andPierre Curie

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    PIEZOELECTRIC

    EFFECT

    When pressure is applied to a material it createsstrain or deformation in the material, this strain

    creates an electrical potential difference.

    Pressure Voltage

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    PIEZOELECTRIC

    EFFECT

    The piezoelectric effectis found in materials with

    a specific electrical

    crystalline structure.

    Quartz

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    A piezoelectric material cannot be isotropic, or identicalin all directions.

    Natural materials

    PIEZOELECTRIC

    MATERIALS

    Quartz Tourmaline

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    PIEZOELECTRIC

    MATERIALSSynthetic materials

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    The material isisotropic and yieldsno resultant electricpolarization when a

    force is applied.

    PIEZOELECTRIC

    MATERIALS

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    Both materials yieldparallel andperpendicularpolarizations

    respectively when aforce is applied.

    PIEZOELECTRIC

    MATERIALS

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    PARTS

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    APPLICATIONS

    Ultrasonic transmitters and receivers.

    Accelerometers

    Microphones and loudspeakers

    Force sensor

    ent of airbags.

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    APPLICATIONS

    Dynamic measurement of cylinder pressureand fuel injection pressure in the developmentof internal combustion engines.

    Continuous monitoring of cylinder pressures inlarge diesel engines.

    Measurement of explosion pressures in thedevelopment of air bags.

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    ADVANTAGESLow cost

    High sensitivity

    High mechanical stiffness

    Broad frequency range

    Small size

    High modulus of elasticity of many piezoelectric materials.

    The piezoelectric technology is insensitive to electromagnetic fields andradiation, enabling measurements under adverse conditions.

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    Elevated temperatures and very high pressures cause

    an additional failure in the internal resistance and the

    sensitivity of the measurement.

    DISADVANTAGES

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    THE MECHANISM FOR THE ESTERIFICATION REACTION.[enlnea]. http://www.chemguide.co.uk/physical/catalysis/esterify.html[citado en 23 de octubre de 2011]

    ESTERIFICACIN. [en lnea].http://www.plantasquimicas.com/Procesunit/Ester.htm[citado en 23 de octubre de 2011]

    LOS ESTERES. [en lnea]. http://www.galeon.com/cheko/fisicas.html[citado en 23 de octubre de 2011]

    ESTERES. [en lnea].http://www.quimicaorganica.org/esteres/nomenclatura-de-esteres.html

    [citado en 23 de octubre de 2011]

    BIBLIOGRAPHY

    http://www.chemguide.co.uk/physical/catalysis/esterify.htmlhttp://www.plantasquimicas.com/Procesunit/Ester.htmhttp://www.plantasquimicas.com/Procesunit/Ester.htmhttp://www.plantasquimicas.com/Procesunit/Ester.htmhttp://www.plantasquimicas.com/Procesunit/Ester.htmhttp://www.chemguide.co.uk/physical/catalysis/esterify.htmlhttp://www.chemguide.co.uk/physical/catalysis/esterify.htmlhttp://www.chemguide.co.uk/physical/catalysis/esterify.html
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