10 near-infrared spectroscopy current … diagnosis of water and chloride content at the ......
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Final Numerical Targets
Concept Illustration of New Maintenance
New Business Concept
Inspection Service with Consulting SupportInspection Service with Consulting SupportInspection Service with Consulting Support
1. Remote diagnosis of water and chloride content at the surface of concrete at 3 m intervals. 2. Measurement time: 10 sec per 1 m × 1 m area. 3. Equipment weight: under 5 kg
1) Application in the primary screening of reinforced concrete structures
2) Evidence of a long-term maintenance plan against fatal deterioration
Contour diagram of concrete deterioration distribution by remote diagnosis via primary screening. Labor-saving by extracting maintenance positions with high priority.
Tunnel inspection service
(1) Chloride distribution of bridge pair 〇〇 yen
(2) External force map by environmental factors 〇〇 yen
(3) Water deposit distribution map 〇〇 yen
Annual inspection service
Bridge pier inspection service
0 kg/m3 10 kg/m3
20 kg/m3 40 kg/m3
Visualization of deterioration ○Quantification of salt damage by Multi-component analysis
<visible camera image> <visualization of salt content>
○Visualization of the amount of water distribution (bridge pier)
Visible camera image
Detection of water deposits (Visualization dark and light regions)
Abso
rban
ce (A
U)
1000 1500 2000 2500
Wavelength (nm)
Left : Test pieces with different amounts of water-soluble chloride. (Caption: Chloride concentration)
Right : Estimation of the amount of chloride by analysis
Black shading : Large amounts of water at the surface
★ This imaging measurement is not available under conditions where light saturation or light quantity are insufficient.
High
Low
Near future: Implementation of a contour diagram scheme of salt damage on a bridge pier
Visualization of the deposits of water
Typical Spectra (1200 nm monochromatic light)
<Near Infra-Red Detector>
<Remote Measurement System>
Light diffusion board
Light source
1000 1500 2000 25000.0
0.1
0.2
0.3
0.4
0.5
Eliminating stray light
With stray light
Sensitivity improvement in absorbance spectra
Eliminating stray light Abnormal signal
Measures against stray light enabled extremely high accuracy and sensitivity in this project.
Wide band NIR sensor (wavelength =1.0~2.35μm)
We developed spectroscopic system to be used from a remote location for this project.
(wavelength =1.0 2.35μm)2.35μm)
・Remote spectroscopy ・Primary screening ・Detection of slight deterioration
What we have Developed
Remote sensing of concrete structure with the high-sensitive near-infrared spectroscopy Kazuhiro Tsuno (Shutoko Engineering Co., Ltd.) Shutoko Engineering Co., Ltd., AIST, Tohoku University, Fuji Electric Co., Ltd., Sumitomo Electric Industries, Ltd.
Remote Observation of Deterioration Factors of Concrete ⇒ No need for approaching/contact/ scaffolding/traffic regulation
Prevention and early diagnosis of damage via primary screening ⇒ Long-life infrastructures, Cost savings in maintenance,
Distribution of Deterioration Factor (concentration of moisture /chloride ions
Remote Observation of
Objectives of this Study
For ① Detecting location for precise inspection ② Preventive maintenance/Repair
(1 ) Inspection, Monitoring and D
iagnostics(2 ) Structural M
aterials,Deterioration
Mechanism
s, Repairs, and Reinforcement
(3 ) Information and C
omm
unications(4 ) R
obotics(5 ) A
sset Managem
ent
(1 ) Inspection, Monitoring and D
iagnostics(2 ) Structural M
aterials,Deterioration
Mechanism
s, Repairs, and Reinforcement
(3 ) Information and C
omm
unications(4 ) R
obotics(5 ) A
sset Managem
ent
R&D Objectives and Subjects
Current Accomplishments (1/2) Goals
Current Accomplishments (2/2)
(1) Inspection, Monitoring and Diagnostics Technologies
(2 ) Structural Materials,Deterioration
Mechanism
s, Repairs, and Reinforcement
(3 ) Information and C
omm
unications(4 ) R
obotics(5 ) A
sset Managem
ent(1 ) Inspection, M
onitoring and Diagnostics
(2 ) Structural Materials,Deterioration
Mechanism
s, Repairs, and Reinforcement
(3 ) Information and C
omm
unications(4 ) R
obotics(5 ) A
sset Managem
ent
(2 ) Structural Materials,Deterioration
Mechanism
s, Repairs, and Reinforcement
(3 ) Information and C
omm
unications(4 ) R
obotics(5 ) A
sset Managem
ent(1 ) Inspection, M
onitoring and Diagnostics
(2 ) Structural Materials,Deterioration
Mechanism
s, Repairs, and Reinforcement
(3 ) Information and C
omm
unications(4 ) R
obotics(5 ) A
sset Managem
ent
R&D Objectives and Subjects
Current Accomplishments (1/2) Goals
Current Accomplishments (2/2)
(1) Inspection, Monitoring and Diagnostics Technologies
Remote sensing of concrete structure with the high-sensitive near-infrared spectroscopy10
Principal Investigator Kazuhiro Tsuno (Shutoko Engineering Co., Ltd.)Collaborative Research Groups Shutoko Engineering Co., Ltd., AIST, Tohoku University, Fuji Electric Co., Ltd.,
Sumitomo Electric Industries, Ltd.
Analysis of concrete data
New technology implemented in our equipment