System for nondestructive, ultrasonic testing of test objects

US4173898A · kind A · utility

Assignee

• Mannesmann AG · DE

Inventors

• Ulrich Forstermann · Sprockhövel, DE
• Hans-Peter Schafer · Wayland, US
• Peter Moller · Wuppertal, DE
• Dieter Lather · Rheurdt, DE
• Karl Ries · Mülheim, DE
• Klaus-Uwe Jannsen · Ratingen, DE

Key dates

• Filing date: Jul 15, 1977
• Grant date: Nov 13, 1979
• Expiry date: Jul 15, 1997

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2291/044
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The system includes a plurality of individually selectable transmitter and receiver channels, a common controller and a common acquisition unit constructed to operate on the basis of parameters which are furnished to the controller and the unit as input signals. Some of the parameters are held in a memory and are withdrawn on the basis of test identification numbers to set up the acquisition unit. The acquisition unit has a transit time counter and two parallel operating looking window generators and several comparator stages, operating under utilization of such parameters. The data as acquired by a test, are accumulated and processed to determine new parameters, if necessary, and feeding them to the memory. The controller conducts the tests on the basis of sequencing the system through a group of test identification numbers, and provides also launch delay and receiving delays on the basis of externally, updatable parameters.