| 摘要 |
<p>1. Device for the supervision of an electrical voltage (36) being subject to unintentional, momentary interruptions (37), comprising means (8 to 11) for detecting said interruption (37), characterized in that it comprises means (12 to 20) for generating a continuous electrical signal (38), the duration of which is representative of that of said interruption (37), first means (21, 23, 24) for sampling the duration of said electrical signal (38) by means of a first periodical series (SC ) of rectangular impulses (39), second means (22, 23, 24, 25) for sampling the duration of said electrical signal (38) by means of a second periodical series (SD ) of rectangular impulses (40), said first and second periodical series being such that the impulses of each of them correspond to the intervals between the impulses of the other series, and means (26) for adding the sampling signals (SE and SF ) appearing at the outputs of said first and second means sampling the duration of said electrical signal (38), in order to obtain a rectangular signal (41), the duration of which corresponds to that of said interruption (37).</p> |
