| 摘要 |
FIELD: electric engineering. SUBSTANCE: device provides control of illumination appliances depending on presence of people in room. Device processes mismatch signals of capacitance bridges. Level of said signals is proportional to variation in capacitance of air in door space at entrance to room when person crosses it. Four variants of device design are described. This results in possibility exclude influence of environment on switch operations and to classify objects which cross entrance area. Device has no visible outer members. This results in possibility of secure and secret monitoring when device is used for security reasons. EFFECT: increased reliability, increased stability to noise, increased functional capabilities. |
