Patent · US Expired

Diagnostic system and method for a valve, especially a check valve of a positive displacement pump

US7621179B2 · kind B2 · utility

23Cited by

5References

4Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Wolfgang Ens · Blankenloch, DE
Alf Püttmer · Karlsruhe, DE

Key dates

Filing date	May 14, 2004
Grant date	Nov 24, 2009
Priority date	—
Expiry date	Mar 13, 2025

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16K37/0083
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A diagnostic system and method for a valve, especially a check valve of a positive displacement pump, including at least one solid-borne sound sensor is provided. A first value of a parameter of a sound signal recorded in the closed state of the valve and a second value of a parameter of a sound signal recorded in the open state of a valve are determined essentially. A signal indicating a disturbance is issued if the deviation between the first value and the second value exceeds a predefined threshold value, resulting in particularly good insensitivity.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.