ABNORMALITY DETECTOR

PURPOSE:To smoothly perform patrol service by controlling whether or not an abnormality occurrence decision signal according to the number of times of the detection output of a person intrusion detection sensor by a device which outputs the abnormality occurrence decision signal according to the output image variation of a TV camera. CONSTITUTION:The image pickup signal of the TV camera to be an object to be monitored is processed by an image processor 3 and a controller 4 decides abnormality according to a change of the output image and generates the abnormality occurrence signal. This controller 4, on the other hand, is applied with detection signals from sensors 2a and 2b for intrusion detection and the output of the abnormality occurrence decision signal from the controller 4 is stopped when the number of times of detection reaches a specific value. A patrolling person, therefore, need not turns off the controller 4 manually every time he or she enters an object area and the patrol service is performed smoothly.