Device for a bed alarm
OwnerOle Hanseninventor
Life of this patent
Estimating the term…
Abstract
The invention relates to a device (1) for an alarm (2) intended for beds (3) and similar locations that, e.g., old people, demented or handicapped persons are arranged to stay on and that is formed of a sensor (7) distributed on the bed and coupled to a monitoring unit (6) that is arranged to provide alarming. The sensor (7) is arranged to co-operate with a radio receiver (9), positioned remotely from the sensor (7), via radio communication, and is formed of a unit that is arranged to measure the difference of the capacitance of a medium in a compressed and in a free state, respectively. The sensor (7) is formed of a compressible plastic core having a conductive gel applied on at least one side thereof and that is covered, on each side, by an electrode each.
Claims9
Device for an alarm intended for beds and similar locations that, e.g., old people, demented or handicapped persons are arranged to stay on and that comprises a sensor placed on the bed and coupled to a monitoring unit that is arranged to provide alarming, characterized in that the sensor, which is arranged to be placed under the mattress of the bed, is arranged to cooperate with a radio receiver, positioned remotely from the sensor, via radio communication, that the sensor is arranged to measure the difference of the capacitance of a medium in a compressed and in a free state, respectively, that the sensor comprises a compressible plastic core of a flexible, porous plastic material having a porous surface, e.g., foam plastic, preferably polyurethane foam plastic, that a conductive gel is applied to cover both sides of the plastic core and arranged to penetrate into the mass of the porous foam, and that the conductive gel is covered, on each side, by an electrode.
Pressure sensor arranged to detect the pressure from persons who are present on said pressure sensor and that, in combination with an electrical room module for the receipt of information from the sensor, forms an alarm unit, characterized in that the sensor unit comprises a transmitter for the cooperation with the room module, as well as a battery, that the sensor is arranged to cooperate with a radio receiver, positioned remotely from the sensor, via radio communication, that the sensor is arranged to measure the difference of the capacitance of a medium in a compressed and in a free state, respectively, that the sensor comprises a compressible plastic core of a flexible, porous plastic material having a porous surface, e.g., foam plastic, preferably polyurethane foam plastic, that a conductive gel is applied to cover both sides of the plastic core and arranged to penetrate into the mass of the porous foam, and that the conductive gel is covered, on each side, by an electrode.
Dependencies are inferred from the claim text.