Agriculture Reference
In-Depth Information
Mgt
strategy
Resource availability:
Machine self-check
Location trigger:
GPS position
Context:
- Ultra-precise
VR seeding
Critical assumptions:
- Seed response to soil
type
- Reliable seed map
External
trigger
Decision outcome:
- Seed drop (not)
detected
Decision:
Drop seed now?
Prior decision(s)
Personal
experience:
Adaptive learning
External
information
sources
Decision records:
- Seed map
- Error map
Information support
systems:
- Desired seed map
Data processing:
- GPS position
- Tractor forward speed
- Seed spacing
Advisors
Machine
data
Historical data:
RAM
Data collection:
- RTK GPS data
- Wheel encoder
- Seed detector
FIGURE 13.3
DFD for an operational decision determined by the controller for an air
seeder: “Drop seed now?” (From Fountas, S. et al.,
Agric. Syst.
, 87, 2, 192-210, 2006. With
permission.)
13.4 WIRELESS SENSOR NETWORK FOR
WORKSITE MANAGEMENT
Wireless technologies have been under rapid development during the past 10 years.
Types of wireless technologies being developed range from simple IrDA that uses
infrared light for short-range, point-to-point communications, to wireless personal
area network (WPAN) for short-range, point-to-multipoint communications, such as
Bluetooth and ZigBee, to mid-range, multi-hop wireless local area network (WLAN),
to long-distance cellular phone systems, such as GSM/GPRS and CDMA (Wang et
al., 2006). Recent scientific and technological revolutions lead to maturity in many
