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Workman 200 Ultra Sonic Boom System (Rev. C)Page 3.2 -- 9
Downward Slope 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
based on the elapsed time between the sensor signal
generationandthe receivedecho.As longas thesensor
height remains the same as the calibrated height, the
spray boom section will remain at a fixed distance from
the ground for spraying accuracy.
When a spray boom section encounters a downward
slope in the turf, the time necessary for the sensor to re-
ceive t he signal echo is longer than the calibrated time-
frame. This change in time causes the TEC to energize
the appropriate electrical relays causing the controlled
boom actuator to extend and the boom section to lower.
Once the boom section is lowered to the calibrated dis-
tance, the elapsed time between the sensor signal gen-
eration and the received echo returns to the correct
timeframe,relaysare de--energizedand theboom stops
lowering. This maintains the boom height at the cali-
brated 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 4
SLOPE
A HIGHER BOOM HEIGHT IS DETECTED SO THE
BOOM ACTUATOR EXTENDS TO LOWER BOOM SECTION
Ultra Sonic
Boom System