Apparatus and method for non-destructive testing of a unit under test, by means of ultrasound according to the comparison body method

摘要

The object of the invention is a method for the nondestructive testing of a test specimen 100 by means of ultrasound, wherein the process for the characterization of faults or imperfections, 99 in the material of the test specimen 100 according to the comparison bodies - method is adapted. For this purpose, ultrasonic pulses with a specific bandwidth b is produced in a comparison body and in angle beam coupled at an angle of acoustic irradiation θ. The comparison body consists of a material of the identically or acoustically equivalent to the material of the test specimen 100 and is at least a reference reflector comprises a known geometry. In the following, the echo signals received from the comparison body, which originate from the reference reflector. These are processed in such a way that, on the basis of a general dac - curve by adaptation to the echo signal of the reference reflector an angle of acoustic irradiation - specific dac - curve for the test specimen 100 is determined. Furthermore, the invention comprises a device for carrying out such a method according to is.