| Manual
Ultrasonic Scanning of plates and pipes pose
severe constrainst of time for inspection.
Accuracy of the inspection depends on operator
skill. Operator fatigue due to extensive manual
work affects accuracy and efficiency of the
inspection. Shield Alloy
(India) Pvt. Ltd. offers an attractive solution
for flaw detection in plates and pipes, using
Advanced NDE techniques by deploying a remote
controlled multiaxes robo.
Manipulator
The manipulator is custom
made and provides a unique opportunity of quick
and accurate NDE data acquisition on Floppy
Disc/Optical Disc or Magnetic Tape.
In UltraScan-96 the probe
holder is driven by three-stepper motors which
drive three preloaded ball screws.
In RadioScan-96, the
specimen is provided transitional and rotational
motions from remote controlled station.
The dimensions of the
ball screws, the helix angle and lead error
accuracy will be to suit the work envelope and
accuracy requirement.
Four encoders provide
positive feedback of X-Y-Z Cartesian co-ordinates
and Angular feedback.
The NDE data is stored in
co-relation with the co-ordinates of the
plates/pipes subjected to inspection.
Control System :
The control system is
rugge-dised IBM Compatible PC 586 with I/O
Controller and Stepper motor controllers.
Control System
includes :
Intel Pentium III, 450
MHz CPU.
64 MB RAM
Super VGA Monitor
2 Serial and 1 Parallel Port
144 Line I/O interface card
Stepper motor control interface card
NDE signal control interface card
Keyboard
Mouse
Laser printer/plotter to obtain hard copy.
Encoder/Position
feedback :
Optical encoders
monitor the rotational data of the stepper motors
and feed back the data to the control system. The
stepper motor is programmed to 0.3 degrees steps.
X-Y-Z and angular co-ordinates in Radio Scan 96
and displayed on monitor in real time and are
recorded on floppy discs/optical discs with
corresponding NDE signals.
Ball screw :
Pre-loaded ball nut
provides high precision in positioning of the
probes and zero backlash.
The Screw thread is surface hardened to offer
lower frictional resistance and lower wear.
Gothic arch profile offers high efficiency in
torque transmission.
High life expectancy.
Maintenance free operation.
Software :
The basic operating
system is MS-DOS 6.2 The system software to
control the stepper motors and to acquire feed
back data is written in 'C' language.
The user interface is menu driven. Menu driven
parameters include :
Probe holder positioning to intended
location.
Speed of X, Y motion
Angular Speed
Speed of probe holder (Z motion)
Display on the screen
will include:
Position co-ordinate X,
Y, Z and angle.
NDE signal obtained by respective probes.
Defect level (comparison with reference defect)
Audio/Visual warning in case of any discontinuity
exceeding reference defect level.
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