| 摘要 |
FIELD: instrumentation.SUBSTANCE: invention relates to a masking mechanism for a motion sensor unit. The proposed internal masking mechanism (20) is positioned inside the motion sensor unit (10) and can be relocated, while suspended, mainly - downwards and upwards resulting in selective unlocking or locking of the passive IR motion sensors (15) for long and short range operation zones accordingly. The internal masking mechanism (20) is essentially L- or reversed T-shaped where the opposite edges of the two parallel post (22) elements are separated by a space and equipped with a horizontal element (23) in the lower part of the two connected vertical elements of the post (22) with a switching handle (21) positioned between the two connected post (22) elements and controlled with the help of the external setting handle (14) through the setting hole (13) on the cylindrical cover (12) of the motion sensor unit (10). The visual control means for indication of long or short range may be additionally provided on the internal masking mechanism (20).EFFECT: technical effect consists in the possibility of controlling main upward and downward relocation of the inner masking mechanism with the help of the external setting handle on the motion sensor unit and in provision of means for visual observation for indication of long or short range for the motion sensor unit.5 cl, 12 dwg |
