EP 1290472 A1 20030312 - WARNING METHOD, SYSTEM AND DEVICE BASED ON TRANSMISSION OF ACOUSTIC SIGNALS
Title (en)
WARNING METHOD, SYSTEM AND DEVICE BASED ON TRANSMISSION OF ACOUSTIC SIGNALS
Title (de)
WARNVERFAHREN, -SYSTEM UND -EINRICHTUNG AUF DER GRUNDLAGE DER ÜBERTRAGUNG AKUSTISCHER SIGNALE
Title (fr)
PROCEDE, SYSTEME ET DISPOSITIF D'ALARME BASE SUR L'EMISSION DE SIGNAUX ACOUSTIQUES
Publication
Application
Priority
- FR 0101247 W 20010424
- FR 0005301 A 20000426
Abstract (en)
[origin: WO0181947A1] The invention concerns a warning system to help preventing drowning accidents. The system comprises at least a sonar (1). Each sonar (1) comprises at least a transmission antenna and a reception antenna having transmission (4) and reception (5) apertures. The sonar (1) is a parametric sonar with high spatial directive gain along said transmission (4) and/or reception (5) apertures. The angular opening of the transmission (17) and/or reception (18) lobes of said transmission and/or reception antennae is of the order of one degree or less than one degree. The system comprises a processing calculator. The sonar (1) comprises amplifier means and transmission means for amplifying and transmitting the electric signals coming from said reception antenna.
IPC 1-7
IPC 8 full level
G01S 15/10 (2006.01); G01S 15/88 (2006.01); G08B 21/08 (2006.01); G01S 7/539 (2006.01)
CPC (source: EP US)
G01S 15/10 (2013.01 - EP US); G01S 15/88 (2013.01 - EP US); G08B 21/082 (2013.01 - EP US); G01S 7/539 (2013.01 - EP US)
Citation (search report)
See references of WO 0181947A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0181947 A1 20011101; AU 5491001 A 20011107; CA 2407131 A1 20011101; EP 1290472 A1 20030312; FR 2808364 A1 20011102; FR 2808364 B3 20020705; US 2003147307 A1 20030807
DOCDB simple family (application)
FR 0101247 W 20010424; AU 5491001 A 20010424; CA 2407131 A 20010424; EP 01928041 A 20010424; FR 0005301 A 20000426; US 25852803 A 20030403