Patents Assigned to Carlsen Melton, Inc.
  • Relative humidity and condensation measurement with a capacitive humidity sensor
    Patent number: 9360445
    Abstract: A method and apparatus for measuring relative humidity including condensing environmental conditions using a circuit with a capacitive humidity sensor and a reference resistor each connected to an input of a switch device and thence a quadrature sampling circuit. A sinusoidal source is first connected to the reference resistor and secondly to the capacitive humidity while a signal ground is first connected to the capacitive humidity sensor and secondly to the reference resistor. This produces a first voltage and a second voltage that are each sampled in quadrature. A complex ratio of the sampled voltages is calculated and converted into a representation of relative humidity.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: June 7, 2016
    Assignee: Carlsen Melton, Inc.
    Inventors: William F Carlsen, Jr., Hewlett E Melton, Jr.
  • Relative humidity and condensation measurement with a capacitive humidity sensor
    Publication number: 20130166224
    Abstract: A method and apparatus for measuring relative humidity including condensing environmental conditions using a circuit with a capacitive humidity sensor and a reference resistor each connected to an input of a switch means and thence a quadrature sampling circuit. A sinusoidal source is first connected to the reference resistor and secondly to the capacitive humidity while a signal ground is first connected to the capacitive humidity sensor and secondly to the reference resistor. This produces a first voltage and a second voltage that are each sampled in quadrature. A complex ratio of the sampled voltages is calculated and converted into a representation of relative humidity.
    Type: Application
    Filed: December 21, 2011
    Publication date: June 27, 2013
    Applicant: Carlsen Melton, Inc.
    Inventors: William F. Carlsen, JR., Hewlett E. Melton, JR.