Piezoelectric bender used as a sensor and actuator

bkraz333

Přidáno Jan 16, 2012  

Kanál Tech

Trvání 4:16   |   zobrazení 4605

Hodnocení:

Piezoelectric benders are devices that have piezoelectric material on either side of a long flexible metal strip. When the material contracts on one side of the strip and expands on the other (eq due to applied voltage), the strip will bend. In many cases, one end of the strip will be fixed, and... Více

Piezoelectric benders are devices that have piezoelectric material on either side of a long flexible metal strip. When the material contracts on one side of the strip and expands on the other (eq due to applied voltage), the strip will bend. In many cases, one end of the strip will be fixed, and the free end will be allowed to deflect to move an object or provide force on an object. In this circuit, I sense the voltage generated when the bender is flexed, then send power to the bender via L6203 H-bridge drivers to effect movement in response. Thus, the bender functions as a sensor and an actuator in the same application. Instead of using a transmit/receive switch, I used a passive network of resistors and diodes to limit the voltage coming back from the bender. An ATMega8 microcontroller senses this limited voltage then controls the L6203's to cause the bender to move. Méně

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