| 摘要 |
<p>The device comprises a lens (16) which produces, on a set (17) of photosensitive elements (19), an image of at least one region of the space within which a person under surveillance is capable of moving, a light source (23) for illuminating said area, fine-control and read-out circuits for the photosensitive elements, an analog-digital converter (21), data processing means (22), for example a microcalculator, for comparing the signals emitted successively by the photosensitive elements (19) and determining the significant variations between these signals which are due to the respiration of said person, and alarm means (14, 15) triggered by said data processing means in response to the detection of an absence of significant variation. Application to the detection of respiratory arrests of infants or bedridden patients.</p> |
