Moisture-detection device
AssigneeVogt Electronic AG
InventorWilli Wimmer
Life of this patent
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Abstract
A device for determining moisture has an LC-oscillating circuit as a transducer and an oscillator for exciting the oscillating circuit. Further, the device for determining moisture has a tuning device for frequency-wise tuning the oscillator and a measuring and evaluation circuit to determine an attenuation condition of the oscillator and to provide a signal that is proportional to a degree of moisture at the transducer. The transducer and the oscillator are coupled in a contact-free manner.
Claims19
A device for determining moisture, said device including an LC-oscillating circuit as a first transducer and a second LC-oscillating circuit as a second transducer;
- an oscillator for exciting the first and second LC-oscillating circuits;
- a tuning circuit for sweep-wise tuning the frequency of the oscillator;
- and
- a measuring and evaluation circuit for recording a dampening or attenuation condition of the first LC-oscillator and for providing a signal that is dependent on an amount of moisture at or surrounding the first transducer;
- wherein the first and second transducers are coupled to the oscillator by a contact-free energy coupling.
A device for determining moisture, said device including:
- an LC-oscillating circuit as a first transducer and a second LC-oscillating circuit as a second transducer;
- an oscillator for exciting the first and second LC-oscillating circuits;
- a tuning device for sweep-wise tuning the frequency of the oscillator;
- and
- a measuring and evaluation circuit for detecting a dampening or attenuation condition of the first LC-oscillator and for providing a signal that is dependent on an amount of moisture at or surrounding the first transducer;
- wherein the first and second transducers are formed of a single conductive lead, respectively.
A device for generating and using a moisture signal as a rain sensor, comprising:
- an LC-oscillating circuit as a first transducer and a second LC-oscillating circuit as a second transducer;
- an oscillator for exciting the first and second LC-oscillating circuits;
- a tuning circuit for sweep-wise tuning the frequency of the oscillator;
- and
- a measuring and evaluation circuit for detecting a dampening or attenuation condition of the first transducer and for providing a signal that is dependent on an amount of moisture at or surrounding the first transducer the moisture being due to rain;
- wherein the first and second transducers are coupled to the oscillator by a contact-free energy coupling, and
- further comprising one or more devices to be controlled by the signal.
A device for generating and using a moisture signal as a rain sensor, comprising:
- an LC-oscillating circuit as a first transducer and a second LC-oscillating circuit as a second transducer;
- an oscillator for exciting the first and second LC-oscillating circuits;
- a tuning device for sweep-wise tuning the frequency of the oscillator;
- and
- a measuring and evaluation circuit for detecting a dampening or attenuation condition of the first transducer and for providing a signal that is dependent on an amount of moisture at or surrounding the first transducer, the moisture being due to rain;
- wherein the first and second transducers are formed of a single conductive lead, respectively;
- and
- further comprising one or more devices to be controlled by the signal.
Dependencies are inferred from the claim text.