Pasko Todorov Paskov, Varna, Bulgaria; Biser Nedelchev Banev, Varna, Bulgaria; Stanislav Tchavdarov Petkov, Berlin, Germany; Stanislav Petkov, Berlin, Germany; and Peter Babourkov, Berlin, Germany.
Assigned to SD Sensitive Diaper GmbH, Berlin, Germany.

Filed: 6/12/20
Issued: 11/18/25

A detecting device for detecting a state of a diaper, said detecting device comprising: a sensor unit comprising a conducting unit including at least two electrodes, the electrodes being configured to detect electrical parameters (R, L, C, Z) of their environment; and a carrier layer to which the conducting unit is attached; wherein a measuring device comprises an input portion being connectable to the sensor unit; a processor configured to receive signals corresponding to values of the electrical parameters detected by the sensor unit and to process said signals; a power control means configured to control electrical power supplied from a power supply; and a determination means configured to determine, based on evaluating the processed signals using predetermined thresholds of the electrical parameters during predetermined time periods, whether a state of a diaper has changed; wherein the sensor unit further comprises a coupling portion on at least one end side of the conducting unit, the coupling portion being connectable to a measuring device; the measuring device further comprises a transmitting means arranged for transmitting information regarding the determined state change to a receiving means; and the processor of the measuring device is configured to perform a resonance scan, during which a periodic signal is sent to the sensor unit at a plurality of frequencies, wherein the power control device is configured to generate the periodic signal for resonance scan at preset frequencies, which are set so as to correspond to respective resonance frequencies of predetermined substances or predetermined ingredients of the predetermined substances, thereby causing resonance oscillation of the predetermined substances or predetermined ingredients of the predetermined substances to differentiated between urine and feces.