US 11,731,190 B2
Method and measuring instrument for measurement of the casting level in a mould
Juergen Briggmann, Ammerbuch (DE); Albert Roedfalk, Dalby (SE); Steffen Mueller, Pforzheim (DE); and Gerd Reime, Buehl (DE)
Assigned to Berthold Technologies GmbH & Co. KG, Bad Wildbad (DE)
Filed by Berthold Technologies GmbH & Co. KG, Bad Wildbad (DE)
Filed on Dec. 3, 2021, as Appl. No. 17/457,538.
Claims priority of application No. 10 2020 215 379.5 (DE), filed on Dec. 4, 2020.
Prior Publication US 2022/0176442 A1, Jun. 9, 2022
Int. Cl. B22D 2/00 (2006.01); G01F 23/26 (2022.01)
CPC B22D 2/003 (2013.01) [G01F 23/26 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for measuring a casting level in a mould, the method comprising the steps of:
a) impressing a temporal current profile (i(t)) into a transmitting coil that is arranged at the mould, during a measuring time interval (MZI);
b) measuring a temporal signal profile (Ue(t)) resulting in a receiving coil during the measuring time interval (MZI), wherein the receiving coil is coupled inductively to the transmitting coil;
c) selecting a time window (ZF) within the measuring time interval; and
d) evaluating the measured temporal signal profile (Ue(t)) within the selected time window (ZF) to determine the casting level (L);
wherein the temporal current profile (i(t)) is a non-sinusoidal temporal current profile.