Method for ascertaining and monitoring fill level of a medium in a container using a travel time measuring method

US10168199B2 · kind B2 · utility

Assignee

• Endress+Hauser SE+Co. KG · DE

Inventors

• Stefan Gorenflo · Mayen, DE
• Stefan Markoni · Rheinfelden (Baden), DE
• Benjamin Monse · Endingen am Kaiserstuhl, DE

Key dates

• Filing date: Jun 2, 2014
• Grant date: Jan 1, 2019
• Expiry date: Sep 4, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S15/88
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a method for ascertaining and monitoring fill level of a medium in a container by means of a field device using a travel time measuring method, wherein transmission signals are transmitted toward the medium and reflection signals are received; the received reflection signals are registered as echo signals in an echo function, or envelope curve, dependent on travel time or travel distance; by means of an echo search algorithm, at least one wanted echo signal is ascertained in the echo function, or envelope curve; by means of at least one filter with filter parameters the echo function, or the envelope curve, is preprocessed; at least a first filter range with a first width is predetermined at the position of the wanted echo signal in the echo function, or in the envelope curve, and at least three filter ranges are formed in the echo function, or in the envelope curve.