SENSOR FOR HUMIDITY AND MANAGEMENT SYSTEM THEREFOR
First Claim
1. A humidity sensor for a diaper comprising:
- two electrode pads having water-permeability conductivity and flexibility, wherein the electrode pads are made by combining fine thread of a mesh-type electric conductor to a paper pad or are made by mixing thread and fine thread of an electric conductor;
an absorption layer for absorbing moisture, the absorption layer being disposed between the two electrode pads; and
a sensing unit for detecting humidity through a capacitance variation between the two electrode pads.
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Abstract
The present invention relates to a sensor for humidity, etc. which has high precision, very small electrical power consumption and simplified composition, and a management system therefor. The sensor and the management system therefor according to the present invention are also economical. The sensor according to the present invention comprises two electrode pads and an absorption layer for absorbing moisture, etc. between them, and detects a capacitance variation and a resistance variation between the electrode pads, measuring humidity, etc. in real time. In the sensor, one or both of the electrode pads can be made by printing or coating a conductive material on a paper pad or a fabric pad in a mesh shape of fine lines. Or the electrode pads can be fabrics with fine thread of a mesh-type electric conductor coated by an absorptive material having an insulating property.
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Citations
21 Claims
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1. A humidity sensor for a diaper comprising:
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two electrode pads having water-permeability conductivity and flexibility, wherein the electrode pads are made by combining fine thread of a mesh-type electric conductor to a paper pad or are made by mixing thread and fine thread of an electric conductor; an absorption layer for absorbing moisture, the absorption layer being disposed between the two electrode pads; and a sensing unit for detecting humidity through a capacitance variation between the two electrode pads. - View Dependent Claims (3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 17, 21)
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2. A humidity sensor for a diaper comprising:
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two electrode pads having water permeability, conductivity and flexibility, wherein the electrode pads are made by combining fine thread of a mesh-type electric conductor to a paper pad or are made by mixing thread and fine thread of an electric conductor; an absorption layer for absorbing moisture, the absorption layer being disposed between the two electrode pads; and a sensing unit for detecting humidity through a resistance variation between the two electrode pads.
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Specification