Radar level gauge with MCU timing circuit

摘要

A method for determining the filling level of a product in a tank using electromagnetic signals, comprising: a) generating a transmission signal having a predetermined length; b) propagating the signal towards the product; c) receiving a reflected signal; d) determining whether the received signal overlaps the transmitted signal in the time-domain; e) setting an overlap-parameter to 1 if overlap is detected, otherwise setting the overlap-parameter to 0; if the state of the overlap parameter is not changed and if no overlap is detected, generate a signal having a length exceeding the previous length and repeat step b); and if the state of the overlap-parameter is not changed and if an overlap is detected, generate a signal having a length shorter than the previous length and repeat step b); and if the state of the overlap-parameter is changed, determine the filling level based on the length of the transmitted signal.

主权项

1. A method for determining the filling level of a product contained in a tank using electromagnetic signals, said method comprising the steps of:
a) generating a transmission signal having a predetermined length in a measurement electronics unit; b) propagating said transmission signal towards a surface of said product contained in a tank via a radiating antenna; c) receiving a reflected signal resulting from reflection of said transmission signal at said surface of said product via the radiating antenna or a receiving antenna; d) determining whether said received reflected signal overlaps said transmitted signal in the time-domain via the measurement electronics unit; e) setting an overlap parameter to state 1 if an overlap is detected and setting said overlap parameter to state 0 if no overlap is detected; and if the state of said overlap parameter is not changed and if no overlap is detected, generating a transmission signal having an updated predetermined length exceeding said first predetermined length and repeating step b); and if the state of said overlap parameter is not changed and if an overlap is detected, generating a transmission signal having an updated predetermined length shorter than said first predetermined length and repeating step b); and if the state of said overlap parameter is changed, determining the filling level of the product contained in the tank based on the predetermined length of the transmitted signal via the measurement electronics unit.