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Understanding Piezoelectric Accelerometers: Applications and Advantages

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Piezoelectric accelerometers are sophisticated devices designed to measure acceleration through a property of specific crystals that generate voltage when stressed. Commonly used in various applications like Wii controllers, smartphones, and airbags, they operate on the principle F = m * a. An essential feature of these sensors is their compact design and lack of a power supply requirement, making them versatile and cost-effective. Key manufacturers include Honeywell and PCB Piezotronics. Explore this technology further to understand its practical applications and advantages.

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Understanding Piezoelectric Accelerometers: Applications and Advantages

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  1. Instrumentation Accelerometers by Jorge Garzon

  2. Application It is a device for measuring acceleration Wii remote control iphone Smart Phone Airbag Instrument

  3. Types LVDTs Laser Transducer Inductive Transducer Laser velocimeter Piezoelectric accelerometer

  4. Principles F = m*a K*Δx = m*a The piezoelectric accelerometer - Based on a property exhibited by certain crystals where a voltage is generated across the crystal when stressed. - A piezoelectric crystal is spring-loaded with a test mass in contact with the crystal. - When exposed to an acceleration, the test mass stresses the crystal by a force (F = ma) - A voltage is generated across the crystal - The measure of t voltage is a measure of the acceleration - The crystal is a very high-impedance source, and thus requires a high-input impedance, low-noise detector

  5. Advantages No power supply Compact Easy to use Cheap Insensitive to normal environments Adaptable to many necessities

  6. Manufacturers CEMB Honeywell PCB Piezotronics SCHMIDT Sensonics Sensorex Vibrametrics DJB instruments More @ http://www.directindustry.com/industrial-manufacturer/accelerometer-62014.htm

  7. Costs Range $99 - $1200

  8. Web Links http://en.wikipedia.org/wiki/Accelerometer http://www.sensotec.com/ProductSelectors/Accelerometer.asp http://zone.ni.com/devzone/cda/ph/p/id/12 http://www.riekerinc.com/Accelerometers_google.htm http://www.omega.com/ppt/pptsc.asp?ref=acc103&Nav=prek02 http://www.reliabilitydirectstore.com/Accelerometers-s/1.htm http://www.microstrain.com/inclinometers.aspx

  9. Thanks Questions?

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