Patent ID: 11928846
Assignee: ESSITY HYGIENE AND HEALTH AKTIEBOLAG
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 2:
3. The method according to claim 2, further comprising:
after decreasing the second time constant, one of the following steps:
waiting for a predetermined time; and
waiting until the second filter output becomes equal to the first filter output within a predetermined tolerance;
wherein adjusting the first threshold based on the second filter output is for the first filter output to follow the second filter output within a predetermined tolerance;
wherein adjusting the first threshold based on the second filter output includes limiting the threshold to a maximum value;
wherein determining a presence includes determining a start of the presence of the creature;
wherein determining an absence includes determining an end of the presence of the creature; and
further comprising: counting creatures by considering one or more determined presences and/or one or more determined absences.