PowerPoint プレゼンテーション

No.6
Development the map of spatial radiation dose by using unmanned helicopter
at low altitude and development of vegetation and land cover map
using hyperspectral technology
Chiba University
Overview of the project
Developing the easy and safe mapping system
for spatial radiation dose distribution at low
altitude in living space including surrounding
forest slope using autonomous unmanned
helicopter (UAV), and vegetation/land cover
map using hyperspectral technique . Obtained
data are evaluated for its utility for
decontamination planning using geographic
information system (GIS).
Content of the project
１． Developing mapping system for spatial
radiation distribution map at the watershed level
using UAV.
２．Developing the vegetation/land cover
mapping method using hyperspectral technique.
３．Constructing measured information
management system using GIS
Main place
Kawamata（Fukushima）
Technical summary
１．Flow of experiment
Hyperspectral
Camera
Winch
Scintillator
Measuring the spatial
Radiation dose automatically
with Minisurveyor.
Automatic measurement of
hyperspectral data and spatial
radiation dose by unmanned
helicopter with winch system.
Measuring result of
spatial radiation dose
at elementary school.
２．Experimental objective
(1)The low-cost and highly efficient
spatial radiation monitoring system using
unmanned helicopter .
(2) Development of vegetation and land
cover map using hyperspectral images.
(3)Management of the spatial information
by the GIS.
Vegetation and land
cover map from the
hyperspectral data.
Spatial
radiation dose map at
山木屋地区における山地斜面の
Yamakiya
mountain slope.
空間線量率分布。この測定を無
Using
unmanned helicopter, we can
人ヘリで行うことにより、低コスト、
make
this map at low cost
簡便に空間線量率マップを作成。
and more efficiently.
３．Expected effect
(1)Development of spatial radiation dose at basins of village forest .
Basins of village forest is the regular vocation of village forest
people.
(2)Construction of GIS system that have potential to formulate
radioactivity control by combine vegetation and land
cover map with spatial radiation dose.
Results
1.Low-cost, high efficiency radiation monitoring by electric multicopter （Minisurveyor）
Below is the results of air dose rate in August and November at Yamakiya Elementary Schoool. Minisurveyor can measure the spatial dose over surplus soil,
that is unmeasurable by walking survey. The demonstration experiment of the autonomous (programmed) flying show that Minisurveyor can achieve high
efficiency automatic radiation monitoring (see the right figure below)
August,2013
November,2013
Altitude:10m
Velocity: 2m/sec
Results of spatial dose measurement by aoutonomous (programmed) flying
Spatial radiation dose rate map at Yamakiya ElementarySchool
2. High-performance, accurate monitoring by YAMAHA/RMAX unmanned engine helicopter
The experiment demonstrated that
unmanned helicopter can conduct the
proximitiy measurement above the
tree crown of a forest (immeasurable
by walking survey), and estimate the
effect of the circumference geographical feature given to a space dose
by acquring the data according to
altitude in several different topograMeasuring result at each alititude
phic features.
over the schoolyard
Spatial dose rate at the north side
of the elementary school
Spatial dose rate over the forest
Measuring result at each
alititude over the paddy field
3.Development of vegetation and land cover map using hyperspectral images
Figures shows different visible-near infrared Spectra in each land
coverage and roof materials.
Each roof mateirials have different spectral characteristics (left figure)
and image classiication can be achieved based on these spectral features.
It is necessary to acquire the ground survey (grand truth data) to
specify the kind of each classification item.
Hyperspectral characteristics of each land cover (left), false color image (middle), image classificatoin result (right).
・We developed the low-cost and highly efficient spatial radiation monitoring system using unmanned helicopter (Minisurveyor, YAMAHA/RMAX) covering the
area including not only the field in the low ground region and the place of residence but also forests and waste land where the walking survey is impossible.
・We also developed the hyperspectral (super-multi wavelength) aerial photographing system that can obtain continuous spectrum between the visible and
near infrared region and demonstrated the land cover classification using hyperspectral image.
・We verified ideal way of managing geographic information system (GIS) for combining the obtained spatial information with various attributes about land.

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