# Fileset

[spie_hzm-sem4.pdf](https://mdr.nims.go.jp/filesets/c8cc3a3e-03c5-4d75-8274-714750b66a29/download)

## Creator

[TODOROKI, Shin-ichi](https://orcid.org/0000-0003-3986-1900), [FUDOUZI, Hiroshi](https://orcid.org/0000-0003-1442-4667), [TSUCHIYA, Koichi](https://orcid.org/0000-0003-0267-2727)

## Rights

Creative Commons BY-NC Attribution-NonCommercial 4.0 International[Creative Commons BY-NC Attribution-NonCommercial 4.0 International](https://creativecommons.org/licenses/by-nc/4.0/)

## Other metadata

[IoT-powered remote sensing and handy real-time evaluation of strain imaging sheets installed on aged outdoor structures](https://mdr.nims.go.jp/datasets/f7453328-b003-4a86-b2ff-a4adbc1e9029)

## Fulltext

spie_hzm.dviSPIE SS 10971-30 (1)✬✫✩✪IoT-powered remote sensing system &portable tools for real-time evaluationof strain imaging sheetsaffixed to old outdoor structures7mAcknowledgements to Dr. Yamaguchi & Dr. Matsuda (Nagasaki U)Reinforced ConcreteS. Todoroki,H. Fudouzi,& K. TsuchiyaSlide 1✬✫✩✪Strain imaging sheets A potential target• Civil engineering=⇒ Many old outdoor structures=⇒ Need to detect potential risksSlide 2SPIE SS 10971-30 (2)✬✫✩✪Strain imaging sheets Pros & Cons• Passive (No electricity required)• Clearly visible• 2D mappingUsemicro-computers! ⇐⇐⇒ Internet unreachable!Slide 3✬✫✩✪Notice Related talk• Passive (No electricity required)• Clearly visible ⇐⇒ UV-degradable!UVTomorrow, 4:30 PM @ Crestone Salon B“Weatherability improvement of strain imaging sheetto use in real field for infrastructure inspection tech.”H. Fudouzi et al. (10970-44)Slide 4SPIE SS 10971-30 (3)✬✫✩✪OVERVIEW Enhance the value ofstrain imaging sheetsStrategiesHow do we realize efficient data acquisition?Remote sensingHow do we connect our sensor to the Internet?Smart inspectionHow do we make non-experts’ evaluation reliable?Slide 5✬✫✩✪Strategy 1 Make them “connected” w/ IoT tech.• Take a photograph & send itover a mobile networkon a solar-powered system.Slide 6SPIE SS 10971-30 (4)✬✫✩✪Strategy 1 Compare w/ IoT Trail Camerathis workCamera viewʞʢSolar irradiation Limited MaximizedLighting situation Dim – Dark NormalSlide 7✬✫✩✪Strategy 2 Use manpower• Ask local volunteers to evaluate/monitor them⇑non-experts• Must provide easy-to-follow instructionsSlide 8SPIE SS 10971-30 (5)✬✫✩✪Strategy 2 Use manpower• Ask local volunteers to evaluate/monitor them• Must provide easy-to-follow instructionsw/ a special application on their PDAsSlide 9✬✫✩✪OVERVIEW Enhance the value ofstrain imaging sheetsStrategiesMake use of micro-computers, IoT tech. & PDAs.Remote sensingHow do we connect our sensor to the Internet?Smart inspectionHow do we make non-experts’ evaluation reliable?Slide 10SPIE SS 10971-30 (6)✬✫✩✪Remote sensing Exposure test site4 P.M.SunsetSlide 11✬✫✩✪Remote sensing Strain imaging sheets installed⇒Sunset⇐⇐⇐⇐ AutomatedmonitoringstationsSlide 12SPIE SS 10971-30 (7)✬✫✩✪Remote sensing Automated monitoring stationMicro-computerw/ switching circuitSolar panels�↖  USB camera=⇒ Power consumption: 0.1 W @ idle• Must save electricity• Take a photo hourly• Camera & network: connectedonly when neededSlide 13✬✫✩✪Remote sensing Semi-night vision camera (color)Solar panels⬇↖  USB cameraNormal=⇒ No extra illumination needed in the shadeSlide 14SPIE SS 10971-30 (8)✬✫✩✪Remote sensing Wireless data acquisition=⇒ Stable operation for 1 year+Slide 15✬✫✩✪OVERVIEW Enhance the value ofstrain imaging sheetsStrategiesMake use of micro-computers, IoT tech. & PDAs.Remote sensingDeveloped solar- & IoT-powered observatory stationsSmart inspectionHow do we make non-experts’ evaluation reliable?Slide 16SPIE SS 10971-30 (9)✬✫✩✪Smart inspection Provide them a portable tool• to extract strain-free areaw/ real-time image analysison their PDAs• “Bring Your Own Device”BYOD like Pokémon GOSlide 17✬✫✩✪Smart inspection Color extractionx  Mask  =→ S→ HRGBHSV-histogramS V H Histogram back-projection(Swain & Ballard, 1990)Slide 18SPIE SS 10971-30 (10)✬✫✩✪Smart inspection Make the gradation clearerColor conversionHue: 348         21            54Shrink ExpandSlide 19✬✫✩✪Smart inspection Available in various PDAsUI & camera control Image processingJava (OpenCV)BringYourOwnDevice SwiftC#C++ (OpenCV) ︸︷︷︸C++ ( )+ USB CameraSlide 20SPIE SS 10971-30 (11)✬✫✩✪SUMMARY Enhance the value ofstrain imaging sheetsStrategiesMake use of micro-computers, IoT tech. & PDAs.Remote sensingDeveloped solar- & IoT-powered observatory stationsSmart inspectionProvide a portable evaluation tool into their PDAs.Slide 21✬✫✩✪Introduction Strain imaging sheets• Polystyrene colloidal particleson PET film, arranged to formphotonic crystal structure(Fudouzi 2009)• Color of reflected lightvaries w/ strainalong the surface.d0dd  > d0Slide 22