equipment is a convenient and easily mobile trolley which is manouvered
around the plate to ultrasonically inspect plate products.
as a 1, 4, 8 or 16 channel system
test up to a band 400mm wide in one pass
near and far surfaces resolution of 2mm
to view both flaw and time of flight information for all channels
in real-time while scanning
generate a C-Scan of an area on the plate
range of plate inspection trollies have been designed specifically
to have a sensitivity such that a 6mm flat bottomed hole to within
2mm of the near and far surface of the plate will be detected.
The equipment consists of a wheeled trolley fitted with the following
3-wheeled inspection unit designed for both umbilical or on-board
electrical power and ultrasonic couplant supplies.
4, 8 or 16-Channel ultrasonic Probe Head fitted with a similar
number of ultrasonic transducers each individually sprung loaded,
with wear shoes.
grade portable computer.
4, 8 or 16-Channel ultrasonic flaw detector system, where the
A-Scan is displayed on the computer.
channel hand transducer with couplant feed for manual defect
These trollies are pushed over steel plate ensuring the surface
area is completely covered, while, the ultrasonic system monitors
the signal from the transducers in the probe head for detection
of defective areas. A band of up to 400mm in width, for the 16-channel
system is covered on each pass along the plate.
A report file including Plate serial number is set up initially
to store all required test information. The plate is then tested.
The software, displays each channel as a bar graph. Defective
areas are alarmed within the software in the form of signal level
bar graphs and alarm gates for each transducer channel. These
are displayed and updated continuously during the scanning process.
Any areas of confirmed local defects can be logged into the reporting
file by means of a C-Scan of the area along with X-Y co-ordinates
manually entered. This C-scan facility has a limited single strip
range as it is only intended for local defect reporting.
The reporting file may be downloaded and viewed, including any
C-Scans that may have been performed, on any PC that conforms
to the minimum required specifications and is loaded with the
report viewing software supplied.
plate testing software is designed to show a real-time display
of the amplitude of the signal within the gate, in the form of
a bar graph. The display colour of this amplitude changes if the
signal is above the pre-set threshold level.
position of any flaw is indicated by the time-of-flight bar graphs
which change colour based on the depth of the flaw within the
colours for both above and below the flaw threshold can be pre-set
by the user. Also the colour range for the time-of-flight bar
graphs and the C-Scan are user pre-set.
separate alarms are provided, one DEFECT alarm, which indicates
that a channel has exceeded the preset threshold. The other, BACKWALL,
which indicates, that there is a loss, for whatever reason, of
the back wall signal.
Main Screen of the plate testing software is shown above.
typical C-Scan from the plate testing software is shown above.
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