30 31

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 thesurface 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 reinforcedconcrete structures

2) Evidence of a long-term maintenance plan againstfatal 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 distributionof bridge pair〇〇 yen

(2) External force map byenvironmental factors〇〇 yen

(3) Water depositdistribution 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 availableunder conditions where light saturation or lightquantity 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 spectroscopyKazuhiro 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 M

echanisms, Repairs, and Reinforcem

ent(3 ) Inform

ation and Com

munications

(4 ) Robotics

(5 ) Asset M

anagement

(1 ) Inspection, Monitoring and D

iagnostics(2 ) Structural M

aterials,Deterioration M

echanisms, Repairs, and Reinforcem

ent(3 ) Inform

ation and Com

munications

(4 ) Robotics

(5 ) Asset M

anagement

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