<p>This invention relates to swimming safety systems. Existing systems either do not discriminate between normal and abnormal swimmer behaviour or require complicated devices to be worn by a user of the system. This invention provides an improved swimming safety system comprising a simple user worn RF tag (1) and a series of receiving aerials (3a, 3b, ...3n) located around the swimming area (11).</p>
申请公布号
WO2004086327(A1)
申请公布日期
2004.10.07
申请号
WO2004GB01327
申请日期
2004.03.29
申请人
QINETIQ LIMITED;TAKEL, STEPHEN, RALPH;ORME, RICHARD, DOUGLAS