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:
May. 20, 2025
Filed:
Nov. 26, 2021
Endress+hauser Flowtec Ag, Reinach, CH;
Endress+Hauser Flowtec AG, Reinach, CH;
Abstract
A vortex flow meter comprises a measuring tube; a bluff body arranged in the measuring tube; a sensor device, having a paddle, a sensor main body and a piezo element, and an electronic operating circuit. The electronic operating circuit has a measuring circuit comprising an operational amplifier and a capacitor. The first capacitor forms a feedback between the output and the measurement input, wherein the reference input can be supplied with a first reference voltage. The measurement circuit has a first switch, wherein the electronic operating circuit is designed to connect the piezo element via the first switch to the measurement input of the operational amplifier and to charge it with a first charging voltage by means of a second switch position. The electronic operating circuit derives an information relating to a state of the piezo element from a discharge process of the piezo element.