VERFAHREN ZUR WANDDICKENMESSUNG VON KOERPERN MITTELS ULTRASCHALLIMPULSEN UND VORRICHTUNG ZUR DURCHFUEHRUNG DES VERFAHRENS

The invention relates to a method and a device for measuring the wall thickness of bodies by means of ultrasonic pulses. The ultrasonic pulses are created in the bodies and reflected on the walls. The transit times of the ultrasonic pulses reflected on the walls are measured. The wall thickness is d...

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Bibliographic Details
Main Author HUESCHELRATH,GERHARD,DR
Format Patent
LanguageGerman
Published 03.04.1986
Edition4
Subjects
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
PHYSICS
TESTING
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Summary:The invention relates to a method and a device for measuring the wall thickness of bodies by means of ultrasonic pulses. The ultrasonic pulses are created in the bodies and reflected on the walls. The transit times of the ultrasonic pulses reflected on the walls are measured. The wall thickness is determined from the transit times by considering the respective sonic speed in the body. The measured signals obtained with a receiver are each compared with a threshold value that is set to a low base value (17a) at the beginning of the measurement. With each measured signal exceeding the associated threshold value (17a, 17b, 17c, 17d respectively) the threshold value is reset to the amplitude of the measured signal. The times from a specified starting time are measured up to the measured pulses that exceed the threshold values. The maximum value of the time corresponds to the transit time of the back wall echo (13).
Bibliography:Application Number: DE19843435989