Ultrasonic-pulse-echo flaw inspection at a high testing speed on thin-walled pipes in particular
First Claim
1. A method for ultrasonic testing, comprising:
- using an ultrasonic transducer to cause oblique sound incidence of an ultrasonic pulsevia an input surface into a test object;
receiving the echo signal from the test object with the ultrasonic transducer or another ultrasonic transducer; and
evaluating the amplitude characteristic of the echo signal over time in a predefined defect expectation interval of time for comparison of the amplitude with a predefined threshold value,wherein the step of evaluation includes amplification of the amplitude with at least one of a gain factor and a reduction in the threshold value in at least one section of the amplitude characteristic of the echo signal in the defect expectation interval of time.
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Accused Products
Abstract
Embodiments relate to a method for ultrasonic testing according to the pulse-echo method as well as an arrangement for performing such a method. By means of an ultrasonic transducer, an ultrasonic pulse is obliquely incident into a sound incidence surface of a test object. Next, an echo signal is received from the test object. This takes place either by means of the ultrasonic transducer, which has emitted the ultrasonic pulse or with another ultrasonic transducer. The time amplitude characteristic of the echo signal is evaluated in a predefined defect expectation interval of time. The evaluation step includes, in at least one section of the amplitude characteristic, an amplification of the amplitude and/or a reduction in the threshold value. For example, the amplitude of the received echo signal is then compared with the predefined threshold value.
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Citations
20 Claims
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1. A method for ultrasonic testing, comprising:
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using an ultrasonic transducer to cause oblique sound incidence of an ultrasonic pulsevia an input surface into a test object; receiving the echo signal from the test object with the ultrasonic transducer or another ultrasonic transducer; and evaluating the amplitude characteristic of the echo signal over time in a predefined defect expectation interval of time for comparison of the amplitude with a predefined threshold value, wherein the step of evaluation includes amplification of the amplitude with at least one of a gain factor and a reduction in the threshold value in at least one section of the amplitude characteristic of the echo signal in the defect expectation interval of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 17, 18, 19, 20)
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14. An arrangement for ultrasonic testing, the arrangement comprising:
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an ultrasonic transducer for oblique sound incidence of an ultrasonic pulse over a sound incidence surface into a test object and for receiving the echo signal from the test object; and an evaluation unit for evaluating the amplitude characteristic of the echo signal over time in a predefined defect expectation interval of time and for comparison of the amplitude with a predefined threshold value, wherein the evaluation unit is also designed to amplify the amplitude characteristic of the echo signal in at least one of at least one section of the defect expectation interval of time and to lower the threshold value. - View Dependent Claims (15)
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Specification