Tracing Granular Products using RFID
Research group:
using RFID
Research group:
Bjarne Bergquist & Björn Kvarnström Quality Technology & Management LTU Quality Technology & Management, LTU Kerstin Vännman
Dept of Mathematics LTU and Statistics UmU
Dept. of Mathematics, LTU and Statistics, UmU
Tracing Granular Products using RFID
using RFID
Industrial partners and funding agents:
Electrotech AB LKAB
Vinnova
EU structural funds Mål 2
Traceability
Traceability of Granular
Traceability of Granular
B A
Pellet
10 mm A
B
Pellet 10 mm
C
D E
H
C
D E
H
D D
F
G
F
G
F
F
, y
rength
6
g nal s tr
4
5 Large transponders
u m s ig
3 4
Small transponders
M axim u
2 3
Container
M
A B C F G H
2
y
g s
8,5
readi n g
4,5 6,5
Large
transponders
b er of r
2,5 4,5
Small
transponders
Num b
0,5 transponders
C t i
A B C F G H
-1,5
Container
e ngth g nal str e Si g
Detection limit
e ngth g nal str e Si g
Detection li it
limit
Reader 1 Reader 1
Antenna 2
Reader 2
Antenna 2
Antenna 2
Read rate, all types of transponders yp p 0.5
r s
0.4
spo nde r
0 2 0.3
e ad tran s
0 1 0.2
a te of r e
0
a R 0.1
Reader 1 Reader 2 Total read
90%
60%
70%
80%
e
40%
50%
60%
Re a d r a te
20%
30%
0%
10%
nt A nt B nt C nt A nt B nt C
Treatmen Treatmen Treatmen Treatmen Treatmen Treatmen
Reader 1 Reader 2
Reader 1 Reader 2
Brazil nut effect
B C
⎛ ⎞
l s
d d
ρ ρ
⎛ ⎞
≈ ⎜ ⎟
⎝ ⎠
s l
d ⎝ ρ ⎠
A Iron ore pellet
Residence times of two experiments
Box-and-Whisker Plot
B C
AB
A.Residence time
C
3200 4200 5200 6200 7200
B o x -a n d -W h is k e r P lo t
A
A Iron ore pellet
B
C
B .R e s id e n c e T im e
C
5 8 6 0 6 2 6 4 6 6
(X 1 0 0 0 ,0 )
Follow up experiments
A-type: spheres with 12mm tags, 4.3 g/cm 3 density
M-type: spheres 4.3 g/cm 3 density (same as pellets)
Iron ore pellet
H-type: spheres 6.1 g/cm 3 density
30000 25000
A H M
Treatment
20000
e time
15000 10000
Residence
5000
5 4
3 2
1 0
Block
