EP1074969A2 - Ultraschallprüfkopf - Google Patents
Ultraschallprüfkopf Download PDFInfo
- Publication number
- EP1074969A2 EP1074969A2 EP00115908A EP00115908A EP1074969A2 EP 1074969 A2 EP1074969 A2 EP 1074969A2 EP 00115908 A EP00115908 A EP 00115908A EP 00115908 A EP00115908 A EP 00115908A EP 1074969 A2 EP1074969 A2 EP 1074969A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- transmitter
- receiver
- test head
- ultrasonic test
- head according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
Definitions
- the invention relates to an ultrasonic test head with a Transmitter, a receiver and a coupling level.
- Ultrasonic probes are used, for example, to test metal components used, which are connected to evaluation units are.
- Such an ultrasonic test head has a transmitter, which radiates ultrasonic signals into a component. These signals are there, e.g. on cracks, reflected and get to a receiver that is also part of the ultrasonic probe is. From the insonification angle and the running time The signals can be the location of a crack or another Errors in the component can be determined.
- the invention has for its object an ultrasonic test head to indicate that with only one sweep of the Surface of a component Defect, especially cracks, in the Component over the entire usual wall thickness of the component allowed to recognize.
- the object is achieved in that the Transmitter, which is a group radiator, and the receiver through a damping layer spaced in a plane parallel to Coupling plane with each other an angle of maximum 5 ° form.
- An angle between 1 ° and 5 ° is particularly suitable.
- the angle of incidence can be varied with the group radiator become. Due to the angle, the transmitter and receiver can form together, then in connection with the group radiator a relatively large test depth can be achieved in the component. Errors, in particular cracks, can be examined in the Component can be recognized to a depth of approx. 50 mm.
- the components that are being examined e.g. pipes in a nuclear power plant
- the invention advantageously the entire wall with only one Inspection process to be examined.
- the group radiator is, for example, a composite vibrator, who is known as such. With that the additional Advantage achieved that you can test with a relatively short Ultrasound pulse gets along and still a wide ultrasound spectrum covers.
- the signal-to-noise ratio is at Use of such a vibrator advantageously larger than with a conventional ultrasonic transmitter. So you get special reliable results.
- the transmitter is a transmitter for longitudinal waves. This achieves the advantage that especially in the upper ones Layers of the component facing the ultrasonic probe are particularly good test results can be achieved.
- a transmitter can also be used that Transverse waves or both longitudinal waves as well Transversal waves sent.
- the receiver is, for example, a piezo oscillator. He can but also a transducer made of composite material. Possibly there may be a group radiator receiver.
- the combination of such a receiver with one of the for the ultrasonic test head according to the invention particularly suitable
- the transmitter enables a particularly reliable test of a Component, the same location of the component only once needs to be examined. Nevertheless, the component is up tested to a depth of approx. 50 mm.
- the damping layer between transmitter and receiver exists for example made of soundproof material. You get thereby particularly good test results, because the transmitter and recipients cannot interfere with each other.
- a particularly suitable material for the damping layer is cork.
- the transmitter and receiver are on separate coupling bodies arranged.
- the coupling bodies are e.g. made of plexiglass. Due to the lack of acoustic separation layers the advantage is achieved between the coupling bodies that Interference with the test process can be largely avoided.
- the ultrasound emitted by the transmitter can be the reflected Ultrasound, which the receiver picks up, does not to disturb.
- the ultrasonic test head in particular the advantage achieved that a component with only a one-time Painting over each surface section up to a depth of approx. 50 mm quickly and reliably for errors, especially for cracks.
- the ultrasonic test head according to the invention consists according to the figure 1 from a group radiator that works as transmitter 1, a piezo oscillator, which works as receiver 2, and off a damping layer 3, e.g. is made of cork, and is wedge-shaped.
- the shape of the damping layer 3 is chosen so that the transmitter 1 and the receiver 2 with each other form an angle ⁇ of maximum 5 °.
- the angle ⁇ between transmitter 1 and receiver 2 is not zero.
- An angle between 1 ° and 5 ° is advantageously chosen.
- the group radiator usually consists of a large number of spotlights 1a.
- FIG. 2 shows the same ultrasonic test head as in FIG. 1, however from the side and coupled to a component to be tested 4, for example a component in a nuclear power plant can be.
- the transmitter 1 is through a damping layer 3 spaced from the receiver 2.
- two separate coupling bodies 5, 6 are present, which together define a coupling level 7.
- this coupling plane 7 corresponds to the flat surface of the testing component 4.
- the coupling body 5 is only for the Transmitter 1 determines and stands beyond transmitter 1 and above the component 4 to be tested not with the coupling body 6 in connection, which is intended only for the receiver 2. It consequently, the transmitter 1 and the receiver 2 cannot mutually be disturbed via the coupling body 5, 6.
- the coupling body 5, 6 consist for example of plexiglass.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
Claims (7)
- Ultraschallprüfkopf mit einem Sender (1), einem Empfänger (2) und einer Ankoppelebene,
dadurch gekennzeichnet, dass der Sender (1), der ein Gruppenstrahler ist, und der Empfänger (2) durch eine Dämpfungsschicht (3) beabstandet in einer Ebene parallel zur Ankoppelebene miteinander einen Winkel von maximal ca. 5° bilden. - Ultraschallprüfkopf nach Anspruch 1,
dadurch gekennzeichnet, dass der Gruppenstrahler ein Compositeschwinger ist. - Ultraschallprüfkopf nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Sender (1) ein Sender für Longitudinalwellen ist.
- Ultraschallprüfkopf nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Empfänger (2) ein Piezoschwinger, ein Compositematerialschwinger oder ein Gruppenstrahlerempfänger ist.
- Ultraschallprüfkopf nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Dämpfungsschicht (3) aus schallundurchlässigem Material besteht.
- Ultraschallprüfkopf nach Anspruch 5,
dadurch gekennzeichnet, dass das schallundurchlässige Material Kork ist. - Ultraschallprüfkopf nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Sender (1) und der Empfänger (2) auf getrennten Ankoppelkörpern (5, 6) angeordnet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19936678 | 1999-08-04 | ||
DE19936678 | 1999-08-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1074969A2 true EP1074969A2 (de) | 2001-02-07 |
EP1074969A3 EP1074969A3 (de) | 2004-03-03 |
Family
ID=7917143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00115908A Withdrawn EP1074969A3 (de) | 1999-08-04 | 2000-07-25 | Ultraschallprüfkopf |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1074969A3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11193522B2 (en) | 2016-11-30 | 2021-12-07 | 3M Innovative Properties Company | Shear bolt |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3546924A (en) * | 1966-12-13 | 1970-12-15 | Concast Ag | Device for locating boundaries of non-homogeneous bodies |
WO1994010681A1 (de) * | 1992-11-03 | 1994-05-11 | Siemens Aktiengesellschaft | Ultraschall-prüfkopf und verfahren zu seinem betrieb |
-
2000
- 2000-07-25 EP EP00115908A patent/EP1074969A3/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3546924A (en) * | 1966-12-13 | 1970-12-15 | Concast Ag | Device for locating boundaries of non-homogeneous bodies |
WO1994010681A1 (de) * | 1992-11-03 | 1994-05-11 | Siemens Aktiengesellschaft | Ultraschall-prüfkopf und verfahren zu seinem betrieb |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11193522B2 (en) | 2016-11-30 | 2021-12-07 | 3M Innovative Properties Company | Shear bolt |
Also Published As
Publication number | Publication date |
---|---|
EP1074969A3 (de) | 2004-03-03 |
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