Method and apparatus for ultrasonic leak location

US5400645A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Ulrich Kunze · Gernsheim, DE
• Walter Knoblach · Forchheim, DE
• Gunther Schulze · Seukendorf, DE

Key dates

• Filing date: Aug 19, 1993
• Grant date: Mar 28, 1995
• Expiry date: Aug 19, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M3/24
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for ultrasonic leak location includes showing sound levels in a bar diagram at various locations along a measurement segment. The measuring segment is divided into subsegments with intrinsically uniform damping. Effective portions are obtained by multiplying the subsegments by the associated damping coefficient, and an effective portion is assigned to each of the subsegments. Corresponding effective measuring positions are ascertained for the measuring locations within the effective portions. Respective logarithmized net sound levels are plotted through the ascertained effective measuring locations and two inclined straight lines are produced as a result. An intersection of the straight lines in the bar diagram is ascertained for identifying a leak point. An apparatus for ultrasonic leak location includes a number of ultrasound pickups being disposed at measuring locations along a measuring segment, a data processing computer, amplifiers and components forming an effective value. The amplifiers and the components are connected between outputs of the ultrasound pickups and the data processing system.