(19)

(11)

EP 1 423 711 A1

(12)

(43) Date of publication: 02.06.2004 Bulletin 2004/23 (21) Application number: 02753147.4 (22) Date of filing: 22.08.2002

(51) International Patent Classification (IPC)7: G01P 5/00, G01M 10/00, G01M 9/06, G01P 13/00 (86) International application number: PCT/GB2002/003865 (87) International publication number: WO 2003/019200 (06.03.2003 Gazette 2003/10)

(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 SK TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 22.08.2001 GB 0120422 (71) Applicant: Ricardo UK Limited Shoreham-by-Sea,West Sussex BN43 5FG (GB)	(72) Inventors: WOOD, Ralph SeafordEast Sussex BN25 2EN (GB) POMMIER, Laurent, Stephane F-78000 Versailles (FR) (74) Representative: Jennings, Nigel Robin  KILBURN & STRODE20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB)