are known, the Poisson number υ can also
If c
and c
T
L
be calculated by means of equation (11):
−
υ
(
)
2 1
C
=
L
−
υ
C
1 2
T
4.12. Combination of B image and A scan for
testing materials
To demonstrate the testing of materials, a body with
invisible discontinuities is provided. A manually guided
B image can be used to gain an initial idea of where
the discontinuities lie. The precise coordinates can then
be determined and plotted with the help of an A scan.
5. Technical details
5.1 Ultrasonic echoscope U10010
Frequency range:
1 MHz to 5 MHz
Measuring mode:
can be switched between
pulse-echo and
transmission modes
Transmitted signal: Dirac pulse
(<1µs, 10 V – 300 V)
Transmitter power: 0 30 dB, in 10 dB steps
Gain:
0-35 dB, in 5 dB steps
Time-dependent
amplifier:
continuously adjustable
threshold, start point, rise time
and duration, up to 30 dB gain
Connections:
TGC signal, trigger, NF signal,
HF signal all via BNC
sockets (Var. Ex)
Computer port:
Sub D-25 socket on LPT
via male-male cable
Sampling rate:
10 MHz per channel
Dimensions:
256 x 257 x 156 mm
Mains voltage:
115 V / 230 V switchable
Power consumption: max. 20 VA
5.2. Ultrasonic transducer 1 MHz U10015
Dimensions:
5.3. Ultrasonic transducer 4 MHz U10017
Dimensions:
5.4. Acrylic block with holes U10027
Dimensions:
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com • Technical amendments are possible
(11)
65 mm x 27 mm ∅
65 mm x 27 mm ∅
150 x 80 x 40 mm
5.5 Equipment set for longitudinal and transverse
ultrasound propagation U10020
Sound trough:
Protractor scale:
Acrylic plate:
Dimensions:
5.6 Aluminum block with protractor scale U10022
Protractor scale:
Aluminum block:
Dimensions:
5.7. Polyoxymethylene (POM) plate with protractor
scale U10023
Protractor scale:
POM plate:
Dimensions:
5.8. Reflection plate U10025
Dimensions:
5.9. Set of 3 cylinders U10026
Dimensions:
5.10. Heart valve model U10029
Dimensions:
5.11. Model of a single breast with benign
tumor L55/1
Model breast made of silicon rubber with simulated
benign growth
6. Bibliography
Millner, R.: Ultraschalltechnik – Grundlagen und
Anwendung. Physik-Verlag, 1987
Kuttruff, H.: Physik und Technik des Ultraschalls. S.
Hirzel-Verlag Stuttgart, 1988
Krautkrämer, J., Krautkrämer, H.: Werkstoffprüfung mit
Ultraschall. Springer Verlag, 1968
Weiterführend:
Sutilov, V.A.: Physik des Ultraschalls. Akademie-Verlag,
Berlin, 1984
Morse, P.M., Ingard, K.U.: Theoretical Acoustics.
McGraw-Hill Book Company, New York, 1968
20
200x100x60 mm
360°, with 5° divisions
70 x 45 x 10 mm
104 x 75 x 50 mm
360°, with 5° divisions
70 x 45 x 50 mm
104 x 75 x 50 mm
360°, with 5° divisions
70 x 45 x 10 mm
104 x 75 x 50 mm
80 x 40 x 10 mm
40 mm x 40 mm ∅
80 mm x 40 mm ∅
120 mm x 40 mm ∅
160 mm x 70 mm