Electromechanical transducer and method for detecting sensitivity variation of electromechanical transducer

Electromechanical transducer and method for detecting sensitivity variation of electromechanical transducer

  • CN 102,458,693 B
  • Filed: 06/18/2010
  • Issued: 02/08/2017
  • Est. Priority Date: 06/19/2009
  • Status: Active Grant
First Claim
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1. a kind of dynamo-electric converter, including:

  • Multiple element, each element comprises at least one unit, and described unit comprises first electrode and second electrode, whereinBetween one electrode and second electrode, there is gap;

    Voltage applying unit, is configured to apply AC voltage to the first electrode of each element in element;

    AndChange of sensitivity computing unit, be configured with the applying due to AC voltage and from each of described elementCalculating the change of sensitivity for this element, " change of sensitivity " refers to exist for each electrode pair the signal of two electrodes outputsElectric current before vibrating diaphragm displacement exports the ratio with the electric current output after vibrating diaphragm displacement;

    At least one unit wherein said includes vibrating diaphragm, is formed among first electrode and second electrode in vibrating diaphragmIndividual, or vibrating diaphragm as first electrode and second electrode one of;

    AndWherein voltage applying unit applies the AC voltage with the frequencies different from the mechanical resonance frequency of vibrating diaphragm.

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