Patent SG-11201901980Q-A (SG)
Title: Method and system for distributed acoustic sensing
Inventor: ENGLUND MARK ANDREW
IPC: G08B13/186
Filed: 2017-09-08
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property :::` , 11111111111 0 1110101011111 011101 0 01111111E11111 01H01111111011110111111 Organization International Bureau (10) International Publication Number 03 (43) International Publication Date .....•\"\" WO 2018/045433 Al 15 March 2018 (15.03.2018) WI P0 I P C T (51) International Patent Classification: (72) Inventor; and GO1D 5/353 (2006.01) GO8B 13/186 (2006.01) (71) Applicant: ENGLUND, Mark Andrew [AU/AU]; G01N 21/47 (2006.01) G01H 9/00 (2006.01) la/1110 Middle Head Road, Mosmon, New South Wales (21) International Application Number: 2088 (AU). PCT/AU2017/050985 (74) Agent: FPA PATENT ATTORNEYS PTY LTD; ANZ (22) International Filing Date: Tower, 161 Castlereagh Street, Sydney, New South Wales 08 September 2017 (08.09.2017) 2000 (AU). (25) Filing Language: English (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, (26) Publication Language: English AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, (30) Priority Data: CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, 2016903617 08 September 2016 (08.09.2016) AU DZ, EC, EE, EG, ES, FL GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, (54) Title: METHOD AND SYSTEM = = =I FOR DISTRIBUTED ACOUSTIC SENSING ..„4 -102 OTDR ,100 I = I = LIGHT SOURCE 104 I 106 I—> 110 — I I , y10 = PHOTODETECTOR 108 105 j110 1110 = ' I ( 410 _ — = PROCESSING UNIT r114 _ = = = = Intensity t = t i - ---......... 112 Intensity t = t 2 116 112 — = 1-1 (57) : Described herein is M involving a dedicated and established fibre optic communications en and system includes the steps of (a) selecting an optical fibre cable installation having a path extending across a selected geographical 71' in area, the optical fibre cable installation including a bundle of optical fibres and forming part of a fibre -optic communications network, > distance FIG. a method and system of distributed distance .. la acoustic sensing, such network including a data centre. In general, the disclosed method as in an urban or metropolitan area 7r (b) determining characteristics associated with the optical fibre and/or the selected optical fibre installation, (c) transmitting outgoing 5 : -. : , :: light in the optical fibre, (d) receiving reflected light back scattered along the optical fibre, and (e) based on the reflected light and GC the determined characteristics, generating an alert signal representative of an acoustic event. The disclosed method and system may be Il © useful in the detection of acoustic events near or within the selected geographical area. N C [Continued on next page] WO 2018/045433 Al MIDEDIMOMOIDEIREEMOOVIMEHINDOMEHOIS SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3))