Sensor for urine and stool detection

Abstract

A sensor for detecting urine and stool secretion mounted over two or more layers of garment, said sensor comprising: at least one light source configured to illuminate said garment; at least one photodetector configured to output an indication of the amount of light reflected from said garment; and an electronic circuit configured to detect said secretion by monitoring said output of said photodetector and identifying a temporal pattern being characteristic of said secretion event.

1 . A sensor for detecting urine and stool secretion, the sensor comprising:
 a housing configured to attach to a plurality of garment layers of a garment   at least one light source configured to illuminate the garment;   at least one photodetector configured to output an indication of the amount of light reflected from the garment; and   an electronic circuit configured to detect the secretion by monitoring the output of the photodetector and identifying a temporal pattern being characteristic of the secretion event.   
     
     
         2 . The sensor according to  claim 1 , wherein the at least one light source comprises at least one light emitting diode. 
     
     
         3 . The sensor according to  claim 1 , wherein the at least one photodetector comprises at least one light dependent resistor. 
     
     
         4 . The sensor of  claim 1 , wherein the housing has a curved bottom shape. 
     
     
         5 . A sensor for detecting urine and stool secretion, the sensor comprising:
 a housing configured to attach to a plurality of garment layers of a garment   at least one capacitive detector configured to detect humidity of the plurality of garment layers, the at least one capacitive detector being configured such that a change in the humidity causes a corresponding change in a magnitude of a capacitance of the capacitive detector, the at least one capacitive detector further configured to output an indication of the magnitude of the capacitance of the capacitive detector; and   an electronic circuit configured to detect the urine and stool secretion by monitoring the output of the capacitive detector and identifying a temporal pattern that is characteristic of the urine and stool secretion.   
     
     
         6 . The sensor of  claim 5 , wherein the housing has a curved bottom shape.