| 摘要 |
PROBLEM TO BE SOLVED: To provide a stationary detection passive sensor capable of stably detecting a stationary heating element, using a single pyroelectric element.SOLUTION: The stationary detection passive sensor includes a pyroelectric element 2; a lens 3 for focusing the pyroelectric element within a detection range of the pyroelectric element; a rotor 4, having a rotating shaft 5 at a bottom and rotating together with the lens; a rotating plate 6 connected with one end of the rotating shaft, a motor 7 for driving the rotating plate; a sensor 8 for detecting a position of the lens; and a diaphragm mechanism 14 for adjusting the quantity of incident light, from the lens to the pyroelectric element according to the position of the lens. |
