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STRAIN SENSOR, PRESSURE SENSOR, MICROPHONE, BLOOD PRESSURESENSOR, PERSONAL DIGITAL ASSISTANT, AND HEARING AID

  • US 20150082919A1
  • Filed: 08/29/2014
  • Published: 03/26/2015
  • Est. Priority Date: 09/20/2013
  • Status: Active Grant
First Claim
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1. A strain sensor comprising:

  • a base including a film body capable of being deformed;

    a strain sensing element provided on the film body and including;

    a first magnetic layer having a first magnetization;

    a second magnetic layer having a second magnetization; and

    a first intermediate layer provided between the first magnetic layer and the second magnetic layer,in the strain sensing element an angle between a direction of the first magnetization and a direction of the second magnetization changing in accordance with a strain;

    a magnetic field sensing element provided on the base other than the film body and including;

    a third magnetic layer having a third magnetization;

    a fourth magnetic layer having a fourth magnetization; and

    a second intermediate layer provided between the third magnetic layer and the fourth magnetic layer,in the magnetic field sensing an angle between a direction of the third magnetization and a direction of the fourth magnetization changing in accordance with a magnetic field; and

    a processing unit configured to process an output signal of the strain sensing element and an output signal of the magnetic field sensing element.

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