(19)

(11)

EP 1 563 314 A1

(12)

(43) Date of publication: 17.08.2005 Bulletin 2005/33 (21) Application number: 02793564.2 (22) Date of filing: 30.12.2002

(51) International Patent Classification (IPC)7: G01S 1/02 (86) International application number: PCT/KR2002/002487 (87) International publication number: WO 2004/040327 (13.05.2004 Gazette 2004/20)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR Designated Extension States: AL LT LV MK RO (30) Priority: 30.10.2002 KR 2002066335 (71) Applicant: Korea Railroad Research Institute Kyonggi-Do 437-050 (KR)	(72) Inventors: JEONG, Rak, Kyo Kyonggi-do 437-050 (KR) YOON, Yong, Ki Kyonggi-do 437-050 (KR) LEE, Eun, Ho Kyongggi-do 437-050 (KR) LEE, Byeong, Song Kyonggi-do 437-050 (KR) (74) Representative: Mounteney, Simon James  Marks & Clerk90 Long Acre London WC2E 9RA London WC2E 9RA (GB)