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OPERATION
Compaction Analyzing System (COMPAS) is a system that
uses an acceleration sensor to show real-time soil stiffness
via LED's (light-emitting diode) turning on with each pass
of the compactor.
This COMPAS improves compaction work efficiency
because it can prevent an already properly compacted area
from being compacted more than necessary and identify
an area where more compaction is needed.
COMPAS also has a function to detect abnormalities such
as vibration trouble (insufficient vibration frequency), ground
trouble (soft soil) and other functional issues (Figure 24).
Figure 24. Compaction Sensor (COMPAS)
COMPACTION PROGRESSION LED’S 1 THRU 8 ON
NORMAL OPERATION
(GREEN LED ON)
COMPACTION LIMIT
LED’S 1 THRU 8 ON
PLUS RED LED ON
SOIL PROBLEM,
GREEN,
AND RED
LED’S ON
VIBRATION ABNORMALITY
(GREEN LED FLASHING)
NOTICE
COMPAS can only show progression of the soil stiffness
and is not meant to measure absolute soil density.
When using COMPAS always calculate appropriate soil
density by conducting proper testing such as plate load
test and dynamic load test to best compliment the LED
lighting progression with the actual measurement value.
NOTICE
Not all yellow status LEDs will turn on. The progression
of the yellow status LEDs depends on the type of
soil being compacted. If compacting gravel (stiff soil)
potentially all status LEDs will turn ON.
If compacting sand (soft soil), fewer status LED's will
turn ON. Remember over compact.
When the plate compactor is in idle mode the green LED
will begin flashing and the red LED will turn on. As the
engine RPM's are increased and compaction begins, the
green LED will stop flashing and turn on (solid). The red
LED will turn off and the #1 yellow LED will turn on. As
compaction progresses the number of yellow LEDs, 2 thru
8 will turn on (Figure 25).
The number of yellow status LEDs that will turn on is soil
dependent.
Figure 25. Compaction Progression
The compaction limit (Figure 26) is achieved when all the
yellow LED's 1 thru 8 including the red LED are all on,
depending on type of soil being compacted . At this point
the machine cannot compact any further. If the compaction
results are not satisfactory then check and make sure the
soil type, moisture content, lift and number of passes are
proper for this machine.
Figure 26. Compaction Limit
NORMAL
OPERATION
(GREEN LED ON)
COMPACTION PROGRESSION LED’S 2 THRU8ON
INITIAL COMPACTION YELLOW LED#1 ON
DURING COMPACTION YELLOW
LED’S 1 THRU8ON
RED LED
ON