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Potential Applications of small UAV to disaster risk assessment, monitoring
and response: its needs and challenges “Going Low Altitude”
Hiroshi Inoue National Research Institute for Earth Science and Disaster
Prevention, Japan
International Workshop on Disaster Risk Reduction and Management under the e-ASIA Joint Research Program and Typhoon Yolanda related J-RAPID Program
April 15, 2015, Quezon City
Minami-Sanriku, Japan in April, 2011
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What is UAV (Unmanned Aerial Vehicle)?
Our small UAVs
iQ420
Military Drone (13m) 100,000,000 USD
Chemical Spray (2m) 100,000 USD
Full-spec Multicopter(1m) 10,000 USD
Payload: 500g, Price 1,000 USD Multicopter Fixed-wing plane 50 cm Size 1 m
30 km/h Speed 60 km/h 10 min Time 30 min 5 km Distance 30 km
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APM Flight Controller (350 USD) and Mission Planner (free)
Our Autopilot System
could be used to control any size of drones
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Flight Regulation for Small UAV in Japan Ground altitude limit Limit surface near airport (fig. below) 250m outside air routes 150m in most areas
More strict regulations for Safety, Privacy, and Security
are under discussion
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Cameras on UAV
Still and movie for picturing 1) Raw images and 2) 3D Surface Model by SfM/MVS Other possible on-board sensors
1) Night scope (infrared) 2) Thermo-camera (infrared) 3) LiDAR for topo 4) Dual frequency GNSS
Ricoh GR GoPro
Agisoft PhotoScan
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Vertical Resolusion Topo Data
10 m Conventional 1/50,000
1 m Airborne IFSAR
10 cm LiDAR DTM Photo DSM
“Going low altitude and high resolution”
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Digital Surface Model
GCP (Ground Control Point)
Cameras at 100m
Coastal Topo for Tsunami/Storm Surge inundation modeling
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2m contour interval
Digital Surface Model Height resolution ~ 1/1,000 of ground altitude
(e.g. 10cm resolution from 100m ground altitude)
RTK GPS
Height accuracy is important for disaster risk assessment
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Field Survey Handheld Tool with GPS
Building locations and classifications
Building Exposure Database for Earthquake Risk Assessment by PHIVOLCS
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Cloud
Low Resolution
Copyright
GoogleEarth Image of Iriga-City, Philippines
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UAV survey in Iriga-City, Philippines
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Orthomosaic
GCP
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Location and height of buildings from orthophoto and DSM
1m contour
Precise GCP coordinates are not necessary.
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Bird-view for building classifications
3D model
Wide-angle camera (GoPro) Oblique photos (Ricoh GR)
50m 50m
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Central Crater of Mt. Aso, Kyushu, Japan Diameter: 400m, Depth: 130m, Alert Level 1 , Nov.7, 2014
Volcano Crater Monitoring
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Ash Sampler Ready
Charge
Arm
Fly
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Digital Surface Model of Aso Volcano Central Crater
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Typhoon Glenda (Rammasun) 2014.7.15-16 in the Philippines
106 casualties
Disaster Response Support
Provincial Governor showed interest in UAV and requested a quick survey
Damaged Resort Pier in Albay
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Provincial Disaster Management Office used the data for recovery planning of the area and examines the introduction of UAV
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3D modeling
Damage survey of Oct. 2013 Bohol Earthquake M7.2
Baclayon Church
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Debris Flow Disaster in Hiroshima, August 2014 Rapid UAV survey requested by the fire department and self-defence forces rescue
Orthomosaic photo of the debris superimposed to residential map Self-Defence Forces
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Target
Risk Assessment
(Pre-disaster)
Mapping topo for assessing hazards by ‘flooding materials’ (tsunami, storm surge, river flood, debris, lava, lahar) and active faults for EQ risk. Mapping vulnerability and exposure of buildings for assessing the disaster risks
Monitoring (for Early Warning)
Monitoring slow-moving landslide Monitoring volcano crater (magma, ash) Monitoring slow-moving lava
Response (by LGU/OCD)
Rapid and frequent information gathering of an on-going disaster for rescue and relief. Information gathering after the disaster for recovery planning and monitoring
Potential Applications of UAVs to Disaster Risk Assessment, Monitoring and Response
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Fell down from 5m only
Hit concrete floor from 4m
Crash from 20m by unknown reason
Wrong preset altitude
100m 100m
30m
Take-off/Landing
Abnormal decent in wind
Accidents are mostly caused by human errors including misjudgment of situation
Challenge 1: Safety
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Full protection to be developed
Safety Operational Procedure 1) Enough skill of control for emergency 2) Calibration and double-check of equipment and missions 3) Right judgments of situation Still difficult to reduce crash rate from 1/100 to 1/1000. Without full protection gears, you should not fly copters over inhabited areas. But, disasters occur inhabited areas.
Prop Guard available
Safety measures for copters
Parachute to be developed
image image
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Another big advantage: larger flight speed (60km/h) , longer flight time(~30min) and distance (~30km) Price: same as copters (or even cheaper) Cons: Needs control skill and wider space for landing.
A solution: Fixed Wing Foam Plane
absorbs shocks when it crashes by breaking itself. People hit feel pain, but not injured.
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Fixed net (under test) Mobile net (tested)
Parachute drag landing (to be tested)
10m
Landing TECHNOLOGY for small or rough landing area or even at a building top
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Challenge 2: Long range and Wind Multicopter Fixed-wing plane
30 km/h Speed 60 km/h 10 min Time 30 min 5 km Distance 30 km
For wider coverage of pre/post-disaster mission
1km
Assumed tsunami disaster area of Fujisawa City, Kanagawa, Japan
20km, 20min mission
City Hall
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Volcano crater mission
2200m
1700m
3.5km
Mayon Rest House
300 m Buco
Tagaytay 8 km
Taal volcano, 20km round trip
8 km
Santo Domingo
Mayon volcano (2463m)
Elevation, Strong wind, Thin Atmosphere Climbing up in tail wind and gliding down in head wind
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Long-range flight test Inland field, no wind 1km go-around 40km in 50 minutes
Coast line in strong wind (8m/s) 19 km round trip in 35 minutes
Pacific Ocean
Chiba Pref.
FX-61 1.5m wingspan 6600mAh batt.
GoPro camera
Tochigi Pref.
Wind
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(movie) Take off for a coast line mission against 6 m/s head wind
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82 km/h ground speed in tail wind
26 km/h ground speed in head wind
Windy coast, Round trip Wind speed
8m/s (28km/h)
Need faster plane in stronger wind
Plane air speed 56km/h
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Challenge 3: Easier operation The system is in practical use by UAV-specialists and
trained researchers. Training can be provided.
For emergency response purposes, however, the system has to be much simpler and easier to be
operated and maintained by LGU staff.
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Challenge 4: Easier data handling The system is in practical use by specialists for research purposes. Training can be provided.
For emergency response purposes, however, the system has to be much simpler and easier for LGU/OCD staff, e.g., to quickly browse the images
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Conclusion 1. Small UAVs are powerful tool for disaster risk
assessment, monitoring and response 2. Cost-effective equipment is available in the
market. 3. Fixed wing plane has advantages of safety and
long range mission. 4. Easy landing, long-range flight, durability
against wind are the major technical challenges 5. The system is ready to be deployed by experts,
but has to be much simpler and easier to use for LGU staff for emergency operations.
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Join us. Thank you
UAV Training for PHIVOLCS, March 3, 2015, in Lantic, Cavite Activities in the Philippines were in SATREPS project by JICA/JST