| 摘要 |
A system for locating people and/or objects inside buildings (40), comprising a series of radio controlled lighting apparatuses (1-7), one or more user's radio devices (8, 9), an electronic unit (10) of control and management of the system and display of the position of user's radio devices (8, 9) and one or more portable terminals (11, 14) for displaying the position of user's radio devices (8, 9); the lighting apparatuses (1-7) are installed at known and prefixed positions inside the building (40) and include a corresponding radio transceiver with FH-DSSS modulation, provided with circuits (RSSI, ToF) suitable to measure, for each message or radio signal sent or received, the amplitude of the received radio signal and/or the propagation delay between a first radio signal (TXA) transmitted by a first transceiver and a second radio signal received (RXB) by a second transceiver due to the transmission of the first radio signal (TXA), in order to get an estimate of the distance (D) existing between a lighting apparatus (1-7) and another.
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