Moister sensor
First Claim
1. A moister sensor for measuring moister in a building, comprising:
- a flexible carrier for attaching said sensor to a floor or inner wall of a building;
a resonant circuit printed on said carrier;
a first antenna printed on said carrier, arranged to receive an electromagnetic signal within a first frequency range of 9 kHz to 11 MHz;
to convert said signal into an AC voltage, the AC voltage being arranged to alternate within said first frequency range; and
to feed said voltage to said resonant circuit,said first antenna being further arranged to emit an electromagnetic signal indicative of an impedance of said resonant circuit; and
an encapsulation layer sealing said moister sensor, the encapsulation layer comprising a humidity permeable portion;
wherein said resonant circuit comprises a moister reactive element comprising;
a first and a second inert electrode comprising electrochemically substantially inert material, each electrode being arranged as a layer, anda hygroscopic solid electrolyte arranged as a layer and spatially between said first and second inert electrodes, the hygroscopic solid electrolyte, at least in the presence of moister, forming mobile ions selected from a group consisting of cations and anions, and the hygroscopic solid electrolyte providing a complex impedance at least in response to said alternating voltage being applied across said first and second inert electrodes.
1 Assignment
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Accused Products
Abstract
A moister sensor, for measuring moister in a building without leaving visible scars to the building surface, is provided. The moister sensor includes a flexible carrier carrying an antenna for receiving EM-radiation between 9 kHz and 11 MHz and a resonant circuit including a moister reactive element. The moister reactive element includes a hygroscopic electrolyte arranged between a first and a second electrode, wherein the electrolyte in the presence of moister forms mobile ions and provides a complex impedance at least in response to the alternating voltage, which complex impedance varies with the moister content of the electrolyte.
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Citations
20 Claims
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1. A moister sensor for measuring moister in a building, comprising:
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a flexible carrier for attaching said sensor to a floor or inner wall of a building; a resonant circuit printed on said carrier; a first antenna printed on said carrier, arranged to receive an electromagnetic signal within a first frequency range of 9 kHz to 11 MHz;
to convert said signal into an AC voltage, the AC voltage being arranged to alternate within said first frequency range; and
to feed said voltage to said resonant circuit,said first antenna being further arranged to emit an electromagnetic signal indicative of an impedance of said resonant circuit; and an encapsulation layer sealing said moister sensor, the encapsulation layer comprising a humidity permeable portion; wherein said resonant circuit comprises a moister reactive element comprising; a first and a second inert electrode comprising electrochemically substantially inert material, each electrode being arranged as a layer, and a hygroscopic solid electrolyte arranged as a layer and spatially between said first and second inert electrodes, the hygroscopic solid electrolyte, at least in the presence of moister, forming mobile ions selected from a group consisting of cations and anions, and the hygroscopic solid electrolyte providing a complex impedance at least in response to said alternating voltage being applied across said first and second inert electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification