| 摘要 |
The invention relates to a passive infrared movement receiver for switching lighting on and/or off, having an infrared detector (3) and a light-sensitive element (7), an analog/digital converter (6) being connected downstream of the infrared detector (3), possibly via one or more amplifier stages (4, 5), and the light-sensitive element (7) being connected via one or more evaluation stages, which together form a twilight switch arrangement (8) to the input (11) of an AND logic circuit (12), and the analog/digital converter (6) being connected to another input (14) of the AND logic circuit (12), and in the case of which a signal is emitted to the output (15) of the AND logic circuit (12) when a signal is present at both inputs (11, 14). In order to make the infrared movement receiver retriggerable, that is to say sensitive to a plurality of movements of a measurement object taking place at time intervals, an OR logic circuit (16) is connected downstream of the AND logic circuit (12), and a timing element (18) which controls the load switch (21) is connected downstream of the OR logic circuit (16). In this way, the load switch remains closed as long as the infrared detector (3) detects movements of a measurement object, for example a plurality of people entering the response area of the infrared detector (3) successively, even when the light-sensitive element (7) is "seeing" the previously reported "light". <IMAGE> |
