×

Method and Apparatus for Noise Control in Ultrasonic Sensors

  • US 20140283607A1
  • Filed: 03/17/2014
  • Published: 09/25/2014
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
Patent Images

1. An active ultrasonic occupancy sensor comprising:

  • an ultrasonic transmitter;

    an ultrasonic receiver;

    a power supply applying power to an adjustable voltage regulator which applies adjustable power to the ultrasonic transmitter;

    a microcontroller controlling the ultrasonic transmitter and the ultrasonic receiver and controlling the output voltage of the adjustable regulator;

    means for processing the received ultrasonic signal to generate a first signal representing the ultrasonic voltage envelope;

    a peak detector processing the first signal to generate an ultrasonic peak noise signal; and

    firmware in the microcontroller for controlling the output voltage of the adjustable regulator according to the ultrasonic peak noise signal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×