| 摘要 |
The invention relates to a device enabling an alarm to be triggered in the event of a fall into a swimming pool, and preventing false alarms caused by disturbing elements such as the wind. Said device consists of a probe ( 1 ) which is submerged in the liquid used to retransmit the aquatic waves varying in pressure in the compression chamber ( 8 ), a piezoelectric-type sensor ( 2 ) which is located inside said chamber and used to convert the pressure variations into electrical voltage, another identical sensor ( 3 ) located in the housing ( 7 ) and enabling the electronic card ( 4 ) to substract the two sets of information enabling the vibrations, in addition to the noise caused by the wind on the housing, to be eliminated, and an electronic card ( 4 ) which is used to control a siren for alerting the parents. The inventive device can optionally pilot a radio emitter ( 5 ) for controlling a deported siren.
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