Patent AU-2014218370-B2 (AU)
Title: Discrimination method of a metal detector
Inventor: WAHRLICH PHILIP SHANE
IPC: G01V3/08
Filed: 2014-04-24
Granted: 2015-02-19
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date W O 2014/172750 Al 30 October 2014 (30.10.2014) W I PO I P CT (51) International Patent Classification: AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, G01V3/11 (2006.01) GO1R 33/00 (2006.01) BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, G01V3/38 (2006.01) DO, DZ, EC, EE, EG, ES, Fl, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, (21) International Application Number: KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, PCT/AU2014/000465 MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, (22) International Filing Date: OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 24 April 2014 (24.04.2014) 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, (25) Filing Language: English Zw. (26) Publication Language: English (84) Designated States (unless otherwise indicated, for every (30) Priority Data: kind of regional protection available): ARIPO (BW, GH, 2013901457 26 April 2013 (26.04.2013) AU GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, (71) Applicant: MINELAB ELECTRONICS PTY LIM- TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, ITED [AU/AU]; 118 Hayward Avenue, Torrensvi!ie 5031, EE, ES, Fl, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, South Australia (AU). MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, (72) Inventor: WAHRLICH, Philip Shane; 118 Hayward Av- TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, enue, Torrensville 5031, South Australia (AU). KM, ML, MR, NE, SN, TD, TG). (74) Agent: MADDERNS; GPO Box 2752, Adelaide 5001, Published: South Australia (AU). - with international search report (Art. 21(3)) (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, (54) Title: DISCRIMINATION METHOD OF A METAL DETECTOR 23 (57) Abstract: A method for detecting a target in a I ------ -- ------ (57) Abstract A methd fo d--e a target i ----- soil using a metal detector, including: generating a providing a receive signal induced by 1 transmit magnetic field for transmission into the the receive magnetic field [ soil based on a transmit signal; receiving a receive -25 magnetic field; providing a receive signal induced processing the receive signal for jby the receive magnetic field; processing the receive signal for producing a set of data which has producing a set of data which has effects 21 effects of signals from the soil reduced therein or of signals from the soil reduced therein removed therefrom; producing at least two com or removed therefrom ponents of a form of at least one time constant spectrum based on the set of data; and producing, r-27 at least one indicator output signal based on the at producing at least two components least two components for indicating the presence of a form of at least one time constant and/or identity of the target when the target is spectrum based on the set of data - ~---within, an. influence of the transmit magnetic 29 field. producing at least one indicator output signal based on the at least two components Figure 2