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1. Islamic Azad University-Takestan Branch, Iran
Department of Biosystems Engineering
Design, Implementation and Evaluation of Potato Yield
Monitoring System
Davood Mohammad Zamani
Assistant Professor
International Conference on Advances in Pure & Applied Sciences
Kuala Lumpur
November, 2014
1

2.  Precision Farming (PA)
 Variable Rate Application (VRT)
 Site-Specific Crop Management (SSCM)
 Yield Monitoring Map
2

3. 3
 Goginen (2002) designed and implemented sweet potato yield
monitoring system.
 Caryn (2002) installed a sugarcane yield monitoring system on
Cameco CH combine.
 Lee, et.al, (2002) designed a yield monitoring system to silage
forage. In this study, global positioning systems, load-cell.
 Bassam.et.al, (2006) have developed the performance of a sensor
for measuring the onion specific gravity.

4. 4
The ultimate objective of this
research is to designing,
construction and evaluation a
system for on-the-go measuring
yield crop and to obtain the best
system performance at different tray
angles relative to the horizontal,
shock absorber and forward speed.

5. 5
 Potato harvesting machine
 Weighting tray

6. 6
 Two load-cells was used for
weighing potatoes
 PLC we used as a controller

7. 7
Potato harvesting machine with the equipment used for
generating yield map
Weighting
tray
Signal
Transmitter
PLC
Load cell

8. 8
 For evaluation of the designed system and get the best
performance of the system, 108 laboratory tests were conducted
on potato harvesting machine.
 Independent variables to test included forward speed, angle of
tray and different shock absorbers

9. 9
Calibration of load-cells

10. 10
Source of
variation
Sum of squares
Degrees
of
freedom
Mean-square F Significant
Angle 2 21.791 0.000
Speed 2 8.270 0.001
Fender 8836712.289 3 2945570.763 0.665 0.577
Repeat 8503756.995 2 4251878.498 0.959 0.388
Angular speed 4 3987877.250 0.900 0.469
Angle, shock
absorbers
1.022 6 1703819.410 0.384 0.877
Speed, shock
absorbers
6 7344991.370 1.657 0.145
Angle * Speed *
Shock absorber
12 2.361 0.013
Error 70 4432686.317 - -
Total 108 - -
ANALYZE OF VARIANCE (ANOVA)

11. 11
Angle
(degree)
Forward speed
(Km/hr)
Shock absorber
averag
e
Standard
error
Confidence
level95% Error
(%)
Lower limit
Upper
limit
30
37
45
4
Without shock
absorber
947.50
64
550.1215 609.264
0
285.748
9
4.85
Thickness 10 mm
385.66
60
550.1215 047.423
6
723.908
4
Thickness 20 mm
713.95
14
550.1215 375.709
0
051.119
39
Double wall
polycarbonate
403.55
59
550.1215 065.313
5
742.798
3
2
Without shock
absorber
522.97
18
550.1215 184.729
4
860.121
42
Thickness 10 mm
126.73
75
550.1215 787.495
0
464.979
9
Thickness 10 mm
071.11
394
550.1215 732.896
9
409.138
18
2.81
16.3
4
Double wall
polycarbonate
050.83
70
550.1215 712.594
5
389.107
94
2
Without shock
absorber
741.58
98
550.1215 402.347
4
079.832
3
Thickness 10 mm
942.69
45
550.1215 604.452
1
280.937
0
Thickness 20 mm
639.83
65
550.1215 300.594
1
977.107
89
Double wall
polycarbonate
700.52
00
550.1215 362.277
6 038.762
5
Interaction between plate angle, forward speed and shock absorber

12. 12
In the use of shock absorbers made of 20 mm thick polymer
because the value of R2= 0.97, and was close to 1, weighting
system measured weight values ​​close to the actual values. In
Analysis of Variance (ANOVA) and Duncan's comparison
method, by changing the angle of tray and traveling speed,
results significantly changed, but with various shock absorbers
and repeat no significant difference seen.

13. 13
Thank you