Hall element speed measurement method and device using electret

Hall element speed measurement method and device using electret

  • CN 104,698,210 A
  • Filed: 03/06/2015
  • Published: 06/10/2015
  • Est. Priority Date: 03/06/2015
  • Status: Active Application
First Claim
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1. use speed measurement method and the device of electret, Hall element, it is characterized in that, it mainly comprises:

  • ---electret, for generation of induced field;

    ---Hall element, for the magnetic induction density in the direction and induced field of detecting induced field, feeds back to microprocessor with Hall voltage form output voltage signal;

    ---cavity, for installing electret, Hall element;

    ---supporting electronic equipment, microprocessor, display, power supply, microprocessor receives the Hall voltage of Hall element feedback, programmed logic computing is carried out according to specific formula, parameter, calculate movement velocity and the direction of object, feedback op result is to display, and demonstrate direction of motion and the movement velocity of object, power supply provides electric energy to package unit.

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