ࡱ> 03/9 /bjbj܎܎ 8hhI] p8.3G kmmmmmm$x!RSSSSLkSk 1JdW0!^!!SSSSSSSa:SSSSSSS!SSSSSSSSS X 6: HA field implementation of a remote crack detection system based on plastic optical fiber sensors to monitor cracks in concrete pedestrian pavementsV. Ramani, Y.J Zhou and K.S.C. KuangDepartment of Civil and Environmental Engineering, National University of Singapore 117576, Singaporevasantha.ramani@u.nus.edu, e0127376@u.nus.edu, kevinkuang@nus.edu.sgAbstractPavements are ubiquitous in public areas and these walkways alongside roads have been built to provide a safe and convenient footpath for pedestrians and users of personal mobility devices (such bicycles, e-scooters, motorized wheel chairs and others). In many areas of Singapore, trees are planted close to these pavements to provide shades for users from the sun as well as an integral part of the green ambition of the city-state. Frequently, as a result of the growth of the roots of these tress, or other factors, pavements close to them are subjected to stress loading leading to cracking of the pavements. The aim of this paper is to outline an attempt to implement a crack-sensing system based on a low-cost plastic optical fiber and an SMS-based remote monitoring setup to provide warning of crack initiation to the public agencies to carry out further investigation and reinstatement works to ensure public safety and general aesthetics. There are remains many challenges to be overcome however it is envisioned that the proposed system could serve as initial prototype for pavement condition monitoring which could be easily scaled up at a low cost for nationwide implementation. Keywords: cracks; pavement; damage detection; plastic optical fiber; sensors; remote monitoring PhD Student Research Fellow Senior Lecturer, Corresponding AuthorThe 33rd KKHTCNN Symposium on Civil EngineeringNovember 17-18 2022, Singaporebc     ' ( A C U W l m n o x ŻŻɧɚzskch5a&hEw5huh#Ko( h#Kh#Kh#Kh5a&6hxhx6h#Kh#K6h#Khu6 hx6h#Kh~G 6h#KhEw6hwhdh#Kjhu0JUhxhEwh5a&hv5CJaJh$5CJaJhwhw5CJaJhw5CJaJ h5a&o(hji%( m n o x '(gd9T$a$gdegdEw$a$gd#K$a$gdu$a$gd5a&$a$gdwx y ^ j  +"$%&'(128:BDhMohA\hzNPJnHtHhxPJnHtHhA\huPJnHo(tHhuhzNjhu0JU hvo( h~G 5h5a&h5a&5hEw hdhdhOn`hdhxh${8 "+,-./ hvo(h,@hvh9T6 h6 h~G 6hvh9T6o(hMojhMoU,-./gdEwgd9T61h2P:pS. A!"n#$%S x666666666vvvvvvvvv666666>6666666666666666666666666666666666666666666666666hH66666666666666666666666666666666666666666666666666666666666666666p62&6FVfv2(&6FVfv&6FVfv&6FVfv&6FVfv&6FVfv&6FVfv8XV~ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@ 0@66666PJ_HmH HnHsH HtHL`L Normal1$ CJKH_HaJmH nHsH tHDA D Default Paragraph FontRiR 0 Table Normal4 l4a (k (0No List >@> 9T0Header9r G$CJaJ2/2 9T0 Header CharKH> > 9T0Footer9r G$CJaJ2/!2 9T0 Footer CharKH:@2: u0Footnote TextG$P/AP u0Footnote Text CharCJKHaJnHtH@&`Q@ u0Footnote ReferenceH*6U a6 #K0 Hyperlink >*B*phcHrH On`0 Balloon TextCJOJQJ^JaJb/b On`0Balloon Text Char(CJKHOJQJ^JaJmH nHsH tHPK![Content_Types].xmlN0EH-J@%ǎǢ|ș$زULTB l,3;rØJB+$G]7O٭Vj\{cp/IDg6wZ0s=Dĵw %;r,qlEآyDQ"Q,=c8B,!gxMD&铁M./SAe^QשF½|SˌDإbj|E7C<bʼNpr8fnߧFrI.{1fVԅ$21(t}kJV1/ ÚQL×07#]fVIhcMZ6/Hߏ bW`Gv Ts'BCt!LQ#JxݴyJ] C:= ċ(tRQ;^e1/-/A_Y)^6(p[_&N}njzb\->;nVb*.7p]M|MMM# ud9c47=iV7̪~㦓ødfÕ 5jz'^9J{rJЃ3Ax| FU9…i3Q/B)LʾRPx)04N O'> agYeHj*kblC=hPW!alfpX OAXl:XVZbrZy4Sw3?WӊhPxzSq]y / HK/& \\\\\_x / / L# @0(  B S  ? OLE_LINK7 OLE_LINK80((0-0[g -033+-0 "+0)&I5MoB* ~G Ejv5a&{'`L)a 7Ix74<,@6AzN*HP9T$WA\On`*fjiuEw+Wx:!z${)xd$d#K'SQweB@/////`@Unknown G.[x Times New Roman5Symbol3. .[x ArialC. /|)Malgun GothicK (PMingLiUPMingLiU9. . Segoe UIW,|8DengXian LightI{~ LightC.,.{$ Calibri Light? |8DengXianI{~7..{$ CalibriA$BCambria Math hܩGܩGRwg  !@!),.:;?]}    " % & ' 2 t%00 0 000000013468:<>@BDOPQRTUVWZ\^ =\]d([{  5 0 0 00000579;=?ACY[][2 KQ@P  $PS2! xx !r Louis Ge Pang Sze Dai Oh+'0  8 D P\hpx Louis GeNormalPang Sze Dai2Microsoft Office Word@F#@6@BJ@BJ ՜.+,0 hp|     Title제목  !"#$%&()*+,-.125Root Entry FpS1J4@1Table!WordDocument 8SummaryInformation(DocumentSummaryInformation8'MsoDataStoreB1J 1JICOLDEOYPIRPA==2B1J 1JItem 2PropertiesUCompObj r   F Microsoft Word 97-2003 Document MSWordDocWord.Document.89q