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Dual Sensor “ALIS “
for Humanitarian Demining
1
Mine Action 2018, Slano , Croatia 12 April 2018
Motoyuki Sato, Kazutaka Kikuta, Iakov Chernyak
Tohoku University, Japan
2 Metal Detector
(EMI) for Mine
Detection
•Electromagnetic Induction
•10-30kHz
•Eddy current in a metal piece
in a mine
•100% Detectability (<20cm)
EMI + GPR =Dual Sensor
3
Hand-held Dual Sensors
UK+Germany:
Mine Hound USA:
HSTAMIDS
Japan：ALIS
ALIS evaluation in Croatia 4
2006 - 2007
Test-site Benkovac
Croatian Mine Action Centre - Centre for Testing, Development and Training (CROMAC-CTDT),
2007-2008
in co-operation with CROMAC and CROMAC-CTDT,
QA/QC (quality assurance/quality control) by QA/QC officers of CROMAC"
ALIS Operation in Croatia 2007-2008 5
Operation in real mine fields in
Cambodia (July 2009-)
6
ALIS
team in
CMAC
detected
more than
80 mines
7 世界中の地雷
ALIS has been evaluated in Mine affected countries
Afghanistan
Dec. 2004
Cambodia
Oct. 2006
Feb 2009-
Egypt
May 2005
Croatia
Feb.2006
October
2007-
Denmark
June. 2009
Germany
Sept. 2009
New technology in ALIS 8
• GPR signal imaging by Synthetic Aperture Radar
• Only in ALIS
9
ininininininininoutoutout dydx
v
rtzyxP
tvrv
rtzyxP
rtzyxP ,0,,
cos,0,,
cos
2
1,,,
2
zyxoutout
,,
inin
yx ,input
point
Scatter
point
outout
yx ,
rt
v
rx
y
Diffraction
hyperbolas
z
SP
zyxoutout
,,
inin
yx ,input
point
Scatter
point
outout
yx ,
rt
v
rx
y
Diffraction
hyperbolas
z
SP
1. The obliquity factor or the directivity factor, cos .
222zyyxxr inoutinout
2. The spherical spreading factor 1/vr.
t
3. The wavelet shaping factor .
SAR imaging
GPR 3D Image
10
A-scan B-scan C-scan
ALIS PMA-2, CMAC test site
11
A-scan B-scan C-scan
12 ALIS display (PMN-2)
Metal detector GPR
13 Signal Processing for Imaging
Raw signal After signal processing
PMN-2 Cambodia
ALIS 14
2006 2009 - 2016 2018-
ALIS 15
• 3100g
• 6-hour operation with a rechargeable batter
• All the technologies developed since 2002 is
integrated
Transportation 16
• Folded metal detector: 810 mm x 310 mm x 265 mm.
17
Evaluation test at
CMAC Demining unit4 18
Inert mines buried in 2006 for JST project were used for evaluation
ALIS Image Type 72, depth=10cm,Lateraite
data#810 6 Feb 2018
19
ALIS Image Type 72, depth=10cm,Lateraite
data#810 6 Feb 2018, CMAC test site, Cambodia
20
Image
Conclusion
• Only one dual sensor with image of GPR
• Easy to operate
• Easy to understand the shape of the buried
objects
• Speedup the Mine clearance operation
21
22
原波形
地中レーダ(GPR)に信号処理を施すことで埋設地雷の３次元可視化ができる。
x
y
SAR-GPR信号処理画像
地表面
地雷
Mine
Clearance
March 2010
October 2010
ALIS operation 24
Technical specifications 25
• Maximum length of the arm support-
telescopic pole unit: 1550 mm.
• Total weight: 3100 g.
• 6 hour operation
26 東北大学が開発した
地雷探知器 ALIS 試作機
（Advanced Landmine Imaging System)
金属探知器と地中レーダの複合センサー
ALIS 操作トレーニング
カンボジア地雷除去センター
(CMAC)
2009年3月
Evaluation test at
CMAC Demining unit4 27
ALIS data acquisition
Lane# x (cm) y (cm) File # File+285time Date Object Depth(cm)
4 30 50 259 544 11:15 5-Feb Type 72 54 30 50 260 545 11:16 5-Feb Type 72 54 30 50 261 546 11:16 5-Feb NG Type 72 54 30 50 262 547 11:17 5-Feb Type 72 54 30 50 263 548 11:17 5-Feb Type 72 54 30 50 264 549 11:18 5-Feb Type 72 54 118 100 265 550 11:18 5-Feb Wood 54 118 100 266 551 11:19 5-Feb Wood 54 118 100 267 552 11:20 5-Feb Wood 54 118 100 268 553 11:20 5-Feb Wood 54 118 100 269 554 11:20 5-Feb Wood 54 62 150 270 555 11:21 5-Feb PMN2 54 62 150 271 556 11:22 5-Feb PMN2 54 62 150 272 557 11:22 5-Feb PMN2 54 62 150 273 558 11:23 5-Feb PMN2 54 62 150 274 559 11:23 5-Feb PMN2 54 130 230 275 560 11:24 5-Feb Screw4 130 230 276 561 11:25 5-Feb Screw
28
Lane # Soil Type4 Sand (dry)5 Clay (Dry)6 Laterite
4-6 February 2018, More than 900 sample data sets have been acquired
CMAC ラタナ長官への報告 29
GICHD 21 March 2007
30
GICHD 21 March 2007
31 Minefields in Croatia
Sibenik
GICHD 21 March 2007
32 ALIS image of a piece of metal wire under a stone
MD GPR
(2007-12-19-PG-2-
No.11)
