Double Revolving field theory-how the rotor develops torque
Ut c
1. ULTRASONIC TESTING N D T
What is the principle ?
Transducer
( PROBE)
Weld
Defect
(Flaw)
Flaw
detector
CRT
screen
2. PROPERTIES OF SOUNDWAVES
Ultrasonic vibrations travel in the form of a wave, similar
to the way light travels.
λ = v/f
λ = Wavelength
v = material sound velocity
f = frequency
ULTRASONIC TESTING
N D T
3. Wave Propagation and Particle Motion:
Longitudinal Wave :
Particle Motion is in the direction
of wave propagation.
Shear Wave :
particle motion is perpendicular
to the direction of the propagation.
ULTRASONIC TESTING
N D T
7. What is an Ultrasonic Transducer?
Ultrasonic transducer works on piezo-electric principle
that converts electrical energy to mechanical energy, in
the form of sound, and vice versa.
ULTRASONIC TESTING
N D T
quartz
8. What is an Ultrasonic Transducer?
Ultrasonic transducer works on piezo-electric principle
that converts electrical energy to mechanical energy, in
the form of sound, and vice versa.
ULTRASONIC TESTING
N D T
quartz +
9. What is an Ultrasonic Transducer?
Ultrasonic transducer works on piezo-electric principle
that converts electrical energy to mechanical energy, in
the form of sound, and vice versa.
ULTRASONIC TESTING
N D T
quartz
10. What is an Ultrasonic Transducer?
Ultrasonic transducer works on piezo-electric principle
that converts electrical energy to mechanical energy, in
the form of sound, and vice versa.
ULTRASONIC TESTING
N D T
quartz+
11. What is an Ultrasonic Transducer?
Ultrasonic transducer works on piezo-electric principle
that converts electrical energy to mechanical energy, in
the form of sound, and vice versa.
ULTRASONIC TESTING
N D T
quartz +
