Patent ID: 11946789
Assignee: ENDRESS+HAUSER SE+CO. KG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. A radar-based fill-level measuring device, comprising:
a pulse generating unit designed to generate high-frequency electrical pulses having a defined clock rate;
a transmitting/receiving unit designed:
to emit the high-frequency pulses as microwave pulses in a direction of a filling material, and
to receive reflected microwave pulses after reflection at a surface of the filling material;

a sampling unit designed to generate electrical sampling pulses at a defined sampling rate;
a mixer designed to mix the received microwave pulses with the sampling pulses such that an evaluation signal is generated;
a detector designed to measure a relation between the sampling rate of the sampling pulses and the clock rate of the high-frequency pulses; and
an evaluation unit designed:
to generate an evaluation curve by using the evaluation signal, the measured relation, and a predefined target relation, and
to determine the fill level on the basis of the evaluation curve,
wherein the evaluation curve is generated by a temporal expansion or compression of the evaluation signal, wherein the compression or the expansion is carried out as a function of a ratio between the measured relation and the target relation.