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Lens cleaning method for a surveillance camera

  • US 10,005,108 B2
  • Filed: 10/17/2016
  • Issued: 06/26/2018
  • Est. Priority Date: 10/17/2016
  • Status: Active Grant
First Claim
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1. A method for cleaning a lens of a surveillance camera, comprising:

  • sensing, with a capacitance sensor, a sensed capacitance of the lens of the surveillance camera, the sensed capacitance indicating the type of foreign object detected on the lens;

    converting, with a capacitive to digital converter, the sensed capacitance to a digital capacitance value;

    activating, with a controller, a first device when the digital capacitance value exceeds a first threshold value that is greater than a second threshold value, wherein the first device is at least one of a lens wiper, a lens defroster and a lens sprayer;

    cleaning the lens with the first device;

    activating, with the controller, a second device when the digital capacitance value is less than the first threshold value and greater than the second threshold value, wherein the second device is at least one of the lens wiper, the lens defroster and the lens sprayer; and

    cleaning the lens with the second device, wherein the second device is not the same as the first device.

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