Patent ID: 11933655
Assignee: ROSEMOUNT TANK RADAR AB
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method of determining a level of a product in a tank, using a radar level gauge system comprising:
a transceiver;
a probe arranged to extend towards and into the product from a first probe end coupled to the transceiver to a second probe end, the probe comprising a first probe conductor and a second probe conductor being conductively coupled to each other by a probe termination arrangement at the second probe end; and
processing circuitry,
the method comprising the steps of:
generating and transmitting, by the transceiver, an electromagnetic transmit signal;
guiding, by the probe, the transmit signal towards and into the product;
returning, by the probe, an electromagnetic reflection signal resulting from reflection of the transmit signal at the surface of the product and at the second probe end;
receiving, by the transceiver, the reflection signal;
determining, based on the reflection signal and a timing relation between the reflection signal and the transmit signal, an echo signal exhibiting an echo signal strength as a function of a propagation parameter indicative of position along the probe; and
determining, by the processing circuitry, the level of the surface of the product based on a propagation parameter value indicative of a first threshold position along the probe for which the echo signal has reached a predetermined threshold signal strength, and an offset indicative of an offset distance along the probe from the first threshold position towards the second probe end.