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Yield Monitoring and Yield Mapping
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Yield Systems
Monitoring and Mapping
Yield Monitoring
Yield monitors are optimized to provide aggregate measurements that approximate the real mass across many loads
when properly calibrated. It is important to know that these measurements are not absolute or certifiable and are
strictly based on constants.
Yield Mapping
Yield mapping, is an electronic process tying GPS coordinates (Latitude and Longitude) to yield data logged in timed
intervals and illustrated in a cartographical format.
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Calculating Yield
Yield Equation
The basic equation for calculating yield is shown below.
Yield = FR / GS x W
Where:
Yield = crop yield (tons per acre)
FR = flow rate (pounds per second)
GS = ground speed (miles per hour)
W = harvest width (header width feet)
If using this equation to calculate yields, it is important to consider all
conversion factors when using dissimilar units. It is equally important
to consider correction factors such as, moisture, test-weight and
slope.
NOTE: When measuring and mapping, it is important to use proper header width
and tire size for speed/distance relationship.
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Yield Meter Principle
Quantimeter
The yield meter uses the grain volume measurement in
the elevator for calculating the yield values. In order to
determine a weight from these values, it is critical to
calibrate the entire system regularly in accordance with
instructions. This also includes the essential factors
relating to area counting such as cutterbar width,
calibration run for the tire contact circle and the working
position setting.
The light barrier (1) in the grain elevator sees the filling
level on the elevator paddles so that the connected
electronic unit (2) can calculate the conveyed volume,
using the basic data of elevator cross-section. As the
filling cone inside the elevator varies in both longitudinal
and cross directions, depending on the machine
inclination, the signals from the inclination sensor (3) are
integrated into the calculation.
To obtain a complete report about the harvested
material, the yield data are supplemented by the grain
moisture as measured by the moisture sensor (4). Since
this measurement cannot be carried out in the grain
flow, a sample chamber controlled as a function of yield
ensures a regular measuring cycle.
All information provided by the yield meter are displayed
on the CEBIS terminal or, if the yield mapping
equipment is installed, provided with a GPS position and
written on a memory card. This data can be used as
documentation of the harvesting development.
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Yield Sensor and Slope Sensor
Yield Meter Principle
Component Info
LEXION combines continuously monitor and process grain yield, logging the data every 5 seconds on a 15 second delay
as determined by the pre-set feederhouse working position.
Moisture is monitored at a variable rate, every 10 to 50 seconds, depending on the volume of harvested grain.
Every 5 seconds yield data and the current moisture data is combined with the current GPS coordinates to create
weigh points – “a spot on a map”.
Control (CEBIS)
Slope sensor
- Resistance
- Mounted on the
front axle
- 0 degrees 3v
- Range: .5 – 5 v
400 series: IMO and CEBIS
500 series: CEBIS only
Yield sensor
- LEM (Light Emitting Measuring unit)
NIR (Near Infrared)
Position (GPS) sensor “Landstar”
- RF (radio frequency)
- Satellite differential correction
- RS-232 9-pin serial connector
- NMEA 0183 com protocol
Feederhouse
- Working Position
Ground Speed
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Moisture sensor
- Capacitance
-Mounted on the clean grain elevator
-Powered by low pressure
-Controlled via LEM module
Calibration Procedure
See OMM Section 6.14-6.15 Yield
meter and measuring
- Make sure that the Calibration factor is set to 1.00
The calibration factor is the multiplier used to
adjust yield accuracy
- Perform Set Zero Yield
Zero’s out the yield sensor, by measuring the
thickness of the elevator paddles (adjusting
for wear and debris) for accurate yield
calculation (paddle thickness is subtracted
from the pile of grain riding on the paddle)
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Calibration Procedure
Zero angle
Position the combine on a known
zero grade and activate
The slope sensor compensates for
pitch and roll of the combine, which
effects the way grain volume is
measured in the clean grain elevator
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Calibration Procedure
Grain Test-weight
Using the included graduated cylinder and hand scale, determine the test-weight of the
grain and enter into CEBIS
Do not perform this function in conjunction with the primary calibration (test weighing)
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Calibration Procedure
Storage Moisture
The value used to correct harvested
grain to dry or storage yield
Storage moisture is used
to determine the dry yield display
Display dry yield (opt.)
Real-time yield is displayed in dry
matter,as determined by storage
moisture setting
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Calibration Procedure
Test-weighing
Primary calibration function
Isolates a desired grain tank amount
for weighing
Start: harvest desired amount
Stop: unload & continue harvesting
Weight measured
(in bushels)
Indicates collected amount from
test-weighing
Value is adjustable for correction
(calibration)
Collected grain should be measured
independently, for yield and moisture
and reported back on a “wet” basis
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Calibration Procedure
Moisture correction
The moisture % value is adjustable
using the + / - buttons
Always make sure that Moisture is
turned on. If not, no value or cycle
will occur
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Yield Segments
Planned Records
Office Segment
Desktop mapping software
Yield Tools by Farm Works
Data card management (PCMCIA)
PCMCIA - Personal Computer Memory Card International Association
Planned records contain the basic information
necessary for determining a field (file) on the combine
Setting up PCMCIA card with Yield Tools
PCMCIA card must be setup on PC before it can be
used in the combine.
Use Lexion Yield Tools to set up PCMCIA card and
define:
Farm Names
Field Names
Operator names
Crop types
Flag names (5 flags total)
!!IMPORTANT!! Setting up new fields on PCMCIA card will overwrite ALL data on the card.
Make sure yield data has been downloaded and saved!
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Yield Segments
Yield monitor control
Data management
• Calibration factor
• Planned records
• Set zero yield
• Completed records
• Test – weighing
• Daily recorder
• Weight measured
• Total recorder
• Moisture correction
• Crop recorder
• Moist. meas. ON/OFF
• Copy to PCMCIA card
• Zero angle
• Storage moisture
• Display dry yield
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CEBIS
Introduction to LEXION
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Planned Records
Mapping ON / OFF
Engages mapping system and its ability
to tie GPS data to yield data
Always leave ON. If forgotten, there is
no audible warning, CEBIS will indicate
“Mapping: OFF”
Mapping monitor
A real-time illustration of harvest travel
Load GPS data
Recalls historical harvest travel lines if
the ignition is ever switched off
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Global Positioning System (GPS)
Planned Records
Field “Work Orders”
Each field starts out as a planned record by selecting
the appropriate basic information for each field:
- Name
- Field
- Crop
- Operator
Note: Only insert or remove the PC
card when key is off.
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Planned Records
Start / Stop
Once a planned record has been selected,
the Start / Stop function begins and ends
data acquisition
Work record:
Started / Stopped
Mapping:
OFF / ON
If either one is stopped while harvesting, no
data will be collected
Work record will engage as the yield monitor
begins sensing grain on (15 second delay)
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Completed Records
Completed records are those planned records
that have been either completed or Stopped and
can be recalled as needed.
A Planned record or a Restarted
Completed record must be Stopped in
order for it to be imported into Yield Tools
mapping software.
Data runs in a loop and requires a
terminator to complete the file for
download.
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Flagging
Pre-programmed flags generated
using Yield Tools software
Up to 4 flags at a time (F)
Operator presses appropriate flag
button, illuminating the LED, and
harvests through the area needing
flagged.
Once flagged area has been
cleared, the operator presses the
same flag button again to stop. The
entire distance will be highlighted by
the flag when mapped
Flag options can be viewed by
pressing the (i) button
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Ag Leader
Insight Monitor
HOME
SETUP
SUMMARY
RUN
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Ag Leader
Insight Monitor
COMPACT
FLASH
SLOT
SPEAKER
POWER / RESET SWITCH
28-pin AMP CONNECTOR
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Ag Leader Yield Monitoring
Components
Elevator Mount Unit
(EMU)
Monitor Mount
Moisture CAN Bus Module
Temperature and
Moisture Sensor
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Speed Module
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Wiring
Ag Leader Yield Monitoring
Measures grain flow coming off the paddles at top
of clean grain elevator
Impact plate - Made of UHMW – Plastic
Flow sensor should be 1” from top of elevator
Adjusted at bottom of clean grain elevator with
lower adjuster
Remove 1 paddle every 13 paddles in the elevator
for impact sensor to function properly
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Flow Sensor
Ag Leader Yield Monitoring
Moisture Meter
Mounts on the side of the Elevator
Mount Unit
Mo
istu
re
S
Sensor measures moisture and
temperature
Easily calibrated at the monitor
ens
or
Moisture CAN
Bus Module
re
istu
Mo
sen
s or
Tem
p. S
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ens
o
r
Ag Leader Yield Monitoring
• Header T-cable is standard with all Claas combine kits
• To check working position
Connects to speed module on Insight systems
• Elevator Tee Cable
• Existing Claas sensor to receive elevator RPM to
accurately calculate grain flow
• Elevator speed between 250-600 rpm should not
be erratic (jumps of 75+ rpm)
Possible causes of inaccurate elevator speed
Channel Setting
Elevator pulses/rev. setting
Sprocket teeth setting
Combine scale factor
Possible faulty sensor
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Ag Leader Yield Monitoring
Ground speed needed for area
Ground Speed Tee Cable
• Use existing Claas sensors
Does not effect OEM combine ground
speed readings
Ground Speed Sensor
Calibrated under distance calibration
Ground Speed Tee Cable
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Ag Leader
Auto-Steering
No factory GPS auto-steering
Aftermarket solutions
Trimble Autopilot system – compatible with Ag Leader
Insight
AutoFarm
TOPCON
• Use Insight as Autopilot interface
• Capable of sub-inch accuracy and repeatability with RTK
• Integrated into vehicles hydraulic system – can use factory
installed hydraulic steering components
• Access to engage button during all operations on the Insight
• Create guidance patterns in SMS and load them into the Insight
• Create guidance patterns on the Insight
• Adaptive & Identical Curve, Center Pivot, AB & A+ patterns
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Insight and Trimble Autopilot
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