The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2003
Filed:
Jan. 28, 2002
Rolf Deserno, Loerrach, DE;
Dietmar Spanke, Loerrach, DE;
Endress + Hauser GmbH + Co. KG, Maulburg, DE;
Abstract
A method of measuring level in a vessel by means of a level measuring device operating with pulses is disclosed. Based on waves being transmitted into the vessel and reflected from the contents of the vessel a digital sampling sequence, representative of the amplitudes of the waves, is generated and a transit time difference, representative of the measuring level, is determined. For determining the difference, a first data tuple, representative of a reference point in the envelope signal and a second data tuple, representative of an echo pulse in the envelope signal, are derived from the sampling sequence, each of the data tuple having an amplitude value and a time value. To obtain the transit time value of the second data tuple an extreme value representative of a highest amplitude value of the echo pulse is derived from the digital sampling sequence, wherein the extreme value being estimated by means of a first, a second and a third data record selected from sampling sequence in range of the echo pulse and wherein the second data tuple being determined by means of the extreme value, respectively.