Wetness detection system
First Claim
1. A system for detecting and signalling the presence of urine in a diaper or similar article of clothing comprisingdetector/transmitter means attachable to the diaper for producing and transmitting a signal when no urine or other conductive matter is present in the diaper,receiver means for receiving the signal transmitted remotely by the detector/transmitter means for producing a received signal in response thereto,timer means for producing a time-out signal if no received signal is produced for a predetermined period of time,repeater means responsive to the time-out signal for transmitting a radio signal,second receiver means for receiving the radio signal and for producing an indicator signal, andindicator means for producing a visual and/or audible indication in response to production of the indicator signal.
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Abstract
A wetness detection system for detecting dampness in diapers or other articles of clothing includes a detector/transmitter which is attachable to the diaper or clothing. The detector/transmitter produces and transmits a signal when no urine or other conductive matter is present in the diaper or clothing, and this signal is received by and retransmitted from a retransmitting station which may, for example, be located on the bed of the person wearing the diaper or clothing. The retransmitted signal is ultimately received at a central station for alerting an attendant when a wetness condition is detected. Since signals are transmitted when no urine is present, the absence of signals over some predetermined period of time indicates that wetness is present.
87 Citations
14 Claims
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1. A system for detecting and signalling the presence of urine in a diaper or similar article of clothing comprising
detector/transmitter means attachable to the diaper for producing and transmitting a signal when no urine or other conductive matter is present in the diaper, receiver means for receiving the signal transmitted remotely by the detector/transmitter means for producing a received signal in response thereto, timer means for producing a time-out signal if no received signal is produced for a predetermined period of time, repeater means responsive to the time-out signal for transmitting a radio signal, second receiver means for receiving the radio signal and for producing an indicator signal, and indicator means for producing a visual and/or audible indication in response to production of the indicator signal.
Specification