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MFC Properties

MFC senser gain

Questions about the MFC electrical and mechanical properties

MFC senser gain

Postby AbdulRahman » Wed May 02, 2018 3:08 am

when use MFC as actuator then it's convert voltage to deflection (strain) by (1000 Volt/mm ) ratio as shown in (smart material company link) [ka=actaution gain = 1000 Volt / mm]
But when use MFC as sensor with smart charge ,so convert deflection to volt ( range of volt is (-3v to 3V)
my question is how many senser gain number ? (mm/Volt)
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Re: MFC senser gain

Postby TPD » Thu May 03, 2018 8:06 am


please download this paper stating the Electric Charge generated by the P1-type and P2-type MFC:, page 3.
The MFC, as all PZT sensors, generate an electric charge which is then converted to voltage depending on the connected circuitry. Think Current Generator.
Therefore, the charge generated as a strain sensor for a M2814P1 is ~1670 pC/ppm (Pico Coulomb/ppm strain).
Also, using the P1 type MFC as an actuator, the free strain is defined as 0.9 ppm/Volt. So 1000V would give you about 900 ppm (parts per million) calculated in relation of the length of the MFC.
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