| 摘要 |
<p>PURPOSE:To improve detection accuracy of monitored objects, relating to an indoor monitoring device which monitors the inside of a shop after closing and a room in absence, etc. CONSTITUTION:This device is provided with an infrared ray sensor 2 which detects infrared ray such as near infrared ray and far infrared ray, and judges the presence of an intruder by utilizing the detection signal of the infrared ray sensor generated when an intruder intrudes into the monitored area in a room. A pressure change detector 1 which outputs pressure change signal when air pressure change in a room is detected, a signal holding means 12 which holds the pressure change signal outputted by the pressure change detector 1 for a specified period and an AND circuit 3 which outputs intruder signal when the pressure change signal held by the signal holding means 12 and the detection signal outputted by an infrared ray sensor 1 are applied are provided.</p> |
