Patent ID: 11959792
Assignee: ENDRESS+HAUSER SE+CO. KG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. A fill level measuring device, comprising:
a transmitting unit designed to transmit a transmitted signal;
a receiving unit embodied to receive a received signal that is dependent on a measured distance; and
an evaluation unit designed to:
create an evaluation curve based at least the received signal;
divide the measured distance into a near region, a middle region, and a far region;
smooth the evaluation curve using at least one filtering method,
wherein the at least one filtering method is a low-pass filtering and a damping factor of the low pass filter increases in the near region as a function of the measured distance, remains constant in the middle region, and decreases in the far region as a function of the measured distance, or
wherein the at least one filtering method is the low-pass filtering and the damping factor of the low pass filter is constant in the near region, is constant in the middle region, is constant in the far region, and is greater in the middle region than in the near region and in the far region, or
wherein the at least one filtering method is a moving average value filtering and a window width of the moving average value filter increases in the near region as a function of the measured distance, is constant in the middle region, and decreases in the far region as a function of the measured distance, or
wherein the at least one filtering method is the moving average value filtering and the window width of the moving average value filter is constant in the near region, is constant in the middle region, is constant in the far region, and is greater in the middle region than in the near region and in the far region, or
wherein the at least one filtering method is a moving maximum value filtering and a window width of the moving maximum value filter increases in the near region as a function of the measured distance, is constant in the middle region, and decreases in the far region as a function of the measured distance, or
wherein the at least one filtering method is the moving maximum value filtering and the window width of the moving maximum value filter is constant in the near region, is constant in the middle region, is constant in the far region, and is greater in the middle region than in the near region and in the far region; and

determine a fill level based on the smoothed evaluation curve.