| 摘要 |
<p>PCT No. PCT/EP97/05442 Sec. 371 Date Apr. 7, 1999 Sec. 102(e) Date Apr. 7, 1999 PCT Filed Oct. 2, 1997 PCT Pub. No. WO98/15930 PCT Pub. Date Apr. 16, 1998The device comprises a transmitter (7) transmitting ultrasound into a predetermined space (5), a sensor (8) which senses the echoes from the transmission by the transmitter into the space in order to deliver a signal representative of the echoes, and electronic device for processing the signal in order to diagnose the possible presence of a moving body in the space (5). It further comprises a) device (10) for scanning the space (5) with the ultrasound beam output by the transmitter (7) and (b) device (11) for simultaneously moving the echo sensor (8) so as to optimize the signal/noise ratio of the output of the sensor (8).</p> |
