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Workman 200 Ultra Sonic Boom System (Rev. C)Page 3.2 -- 11
Rise in Turf Encountered
During sprayer operation with the sonic boom switch in
the automatic position (sonic boom light is illuminated),
the boom mounted sonic boom sensors continually
send impulse signals and then receive echoes as the
signalsbounceoff theturf. The Toroelectroniccontroller
(TEC) determines the sensor distance from the ground
basedon thetime betweenthe sensor signal generation
and the received echo. As long as the sensor height re-
mains the same as the calibrated height, the spray
boom section will remain at a f ixed distance from the
ground for spraying accuracy.
Whena sprayboom sectionencountersa risein theturf,
the time necessary for the sensor to receive the signal
echo is shorter than the calibrated timeframe. This
changeintime causesthe TECto energizetheappropri-
ate electrical relayscausing thecontrolled boomactuat-
or to retract and the boom section to raise. Once the
boom section is raised to the calibrated distance, the
elapsed time between the sensor signal generation and
thereceivedechoreturnstothecorrecttimeframe,re-
lays are de--energized and the boom stops raising. This
maintains the boom height at the calibrated distance
from the ground.
Theboom sensortargetdistanceis initiatedduringinitial
sonic boom calibration and is typically set at twenty (20)
inches. If the boom target distance changeswhen in au-
tomatic mode, the TEC will energize the appropriate
electrical relays. The energized relays will lead to a
changein boomactuator length and ultimately achange
in boom height.
Figure 5
RISE
A LOWER BOOM HEIGHT IS DETECTED SO THE
BOOM ACTUATOR RETRACTS TO RAISE BOOM SECTION
Ultra Sonic
Boom System