RT10-B Rail Flaw Detector

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RT10-B Rail Flaw Detector

• An implementation of testing truck on a push cart

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10 Chanel Portable Rail Flaw Detector A-scan or
B-scan, Recordable
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OUTLINE

• Wheel Probe
• 10 Channel Scope
• Features of the push cart mechanics
• Replay of the test

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Illustration of the wheel probe

• Total of 9 transducers, six 70o, two 37.5o, one
  zero degree

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10 Channel Scope

• Overview
• B-scan
• A-scan
• Replay
• Other Utilities (managing files, change time etc.)

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10 Channel Scope -- Overview
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10 Channel Scope -- Overview

• Both A-scan and B-scan are offered with B-scan as
  the recommended testing mode.
• Continuously Recordable B-scan.
• Built in Windows user interface for easy
  operation, icons commenting screen.
• Continuously GPS tagging.

The operation of the instrument is essentially
like the operation of a high speed testing
vehicle
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10 Channel Scope -- Overview

• Tech Specification

• 10 Channels, 9 of which is used for testing, one
  channel is used for hand verification of defect.
• Frequency range 25MHz
• Repetition Rate Driven by shaft encoder,
  4mm/pulse.
• Alarm Threshold level adjustable, slope line
  detection, audible.
• Recording range gt200 miles

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10 Channel Scope B-scan

• What is B-scan?
• B-scan is a two dimensional view of a scan of
  the rail. It uses horizontal axis as time,
  vertical axis as distance, the color of the pixel
  represent the amplitude of the signal.
• Why B-scan better?
• B-scan is essentially stacking the A-scan
  wave form, it allows the operator to see the
  history of the scan.

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10 Channel Scope B-scan
1
2
3
4
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• Zone 1 Forward and backward Gauge Side 70
  channels
• Zone 2 Forward and backward center 70 channels
• Zone 3 Forward and backward Field side 70
  channels
• Zone 4 Forward and backward 37.5 channels
• Zone 5 zero channel

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10 Channel Scope B-scan
Some 3mm BHBs, see details next 3rd slide
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2
3
4
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Zone
3mm SDH
Detail Fracture Icon
Joints
cyan square for alarm
3mm SDH
GPS
milepost
Gain for each channel
speed
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10 Channel Scope B-scan
1
2
3
4
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Alarm Features Slope line detection Cyan square
indicated on the right Audible with different
tone for different channel, 70 channel lowest,
37.5 channel higher, zero ever higher, LOB (loss
of base) highest
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Zero channel also indicates horizontal BHB,
please note the shift of the white pixel,
Travel Direction
Forward 37.5 beam
Backward 37.5 beam
Horizontal BHB is 5mm, rest BHB is 3mm
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10 Channel Scope B-scan, defect input
With the scan line on the indication, press the
CR key on the panel, the milepost will be
automatically added, make selections and press
OK, icon will be added to the screen
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10 Channel Scope B-scan, structure input
During B-scan, press number key 1, 2, 3, 4 will
put crossing, joints, turn out and bridge icon on
the screen and they are also recorded in the data
file
crossing
joint
bridge
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10 Channel Scope A-scan
From the main menu, use?and?to highlight A-scan
Single, press select key. A blank screen shows
up. Press Start/Stop key to start A-scan single
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10 Channel Scope A-scan
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Tire Rail Interface
Back wall echo
Gate
This is channel I

• Press key, then press and to adjust
  delay
• Press key, then press and to adjust gate
  width
• Press key, then press and to adjust
  threshold
• Press 1, 2, 3, , 9 key to switch channel

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10 Channel Scope Utilities, managing files
From the main menu, select Managing File, a list
of files will be displayed, use?and?to highlight
the desired file, press select key, a menu
selection Copy, Delete, Replay, Cancel will pop
up. Then again use?and?to make selection
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10 Channel Scope Utilities, managing files

• Copy Copy file to thumb drive for archiving or
  replay the test in PC
• Delete Remove the file from the instrument
• Replay Replay the test on the instrument

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10 Channel Scope Utilities, Setup Unit
From the main menu, select Setup Unit, a window
with mile and kilometer displayed, use?and?to
highlight the desired selection, press select
key, the unit selected will be saved. The
distance shown on the test will be based on the
unit selected
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10 Channel Scope Utilities, Setup Clock
From the main menu, select Setup Clock, a window
with date and date displayed, use backspace key
to delete old value and use number key to type in
new number, use Tab key to move to next field.
When done, make OK highlighted and press select
key. New time value will be saved
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10 Channel Scope Utilities

• Restore Setting default to factory setting
• Upgrade software for now it is used for upgrade
  settings from a thumb drive
• Backup setting Copy settings to a thumb drive

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Features of the push cart mechanics

• Flexible design allows easy testing on track and
  conveniently pushing on the ground
• Flexible design allows testing on frog and switch
• Flexible design allows the adjustment of the
  wheel probe to accommodate rail condition, tile
  adjustment and lateral adjustment.

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Features of the push cart mechanicswheel probe
tilt adjustment
Base used to install the wheel probe on the push
stick
First Loose these four screws use hexagon wrench
Then push the base along the red arrow will tilt
the wheel probe in one direction, push along the
other red arrow will tilt the wheel probe in the
opposite direction. Adjust the tilt to maximize
the base reflection of channel 9.
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Features of the push cart mechanicswheel probe
Lateral adjustment
First Loose this screws use a hex driver
Then use hex driver to rotate the screw pointed
by the red arrow to adjust the lateral of the
wheel so as to maximize the base reflection of
channel 9. Then tight the screw pointed by the
yellow arrow.
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Features of the push cart mechanicsOn and Off
the rail track
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The push cart in the above picture is in its off
track status, during testing, the walking part
can be lifted up. To do so, step 1 pull the
handle along red arrow, step 2 lift up along the
yellow arrow
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Features of the push cart mechanicstesting frog
and switch
Derail clamp
To testing frog and switch, move the derail clamp
out of latch and rotate up.
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Replay the test in PC

• Besides replay testing data in the instrument,
  testing data can also be transferred to PC using
  a thumb drive for replay on PC.
• PC replay program allows printing and saving
  B-scan screen shot.
• PC replay program also show a two dimensional
  chart with horizontal axis as testing time and
  vertical axis as milepost, thus it clearly shows
  one day testing plan.

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Replay the test in PC
In the above chart, the testing starts at
101621 and milepost 207.869 and ends at
112143 and milepost 210.264 for a total test of
2.395 mile. To review a particular section, use
mouse left click starting point on the chart, a
green line will be drawn on the chart. Use mouse
right click the ending point on the chart, a red
line will be drawn on the screen. Then click on
start button, the selected section of the test
will be replayed.
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A typical data review screen on PC, bottom shows
the testing time, testing speed, milepost,
testing cart ID, date, track, GPS coordinate. The
circled indication is a 20 detail fracture.