Abstract: A diaper wetness detection system includes a diaper, a wetness sensor, an RFID unit, and a transceiver unit. The RFID unit is a battery-less device that receives an interrogation signal transmitted by the transceiver unit. The RFID unit or the transceiver unit are configured to determine if a measurable characteristic, as sensed by the wetness sensor, indicates if the diaper is wet. The measurable characteristic can be a voltage or current indicative of a resistance, capacitance, or impedance at an area sensed by the wetness sensor. The value of the measurable characteristic is different when the diaper is wet versus dry. Comparing the measurable characteristic value to a threshold value or to one or more previously sensed measurable characteristic values enables a determination to be made as to whether or not the diaper is wet. The RFID unit can be detachably coupled to the diaper for simple attachment and removal.

Abstract: An entry device that is attachable to a door that pivots relative to a door frame to separate an outer area from an inner area is disclosed. The device has a compartment made of a flexible material having a first side and a second side. The flexible material has a front surface that faces the outer area and a back surface that extends into the inner area. At least one first attachment point is disposed along the first side that attaches the compartment to the door and at least one second attachment point is disposed along the second side that attaches the compartment to the door frame. According to the present invention, upon opening of the door, the compartment is configured to allow partial entry of an object to the inner area and prevent full entry by a person from the outer area.