ALARMING GENERATION DEVICE FOR CCTV CAMERA COVERING

摘要

PURPOSE: A standalone alarm apparatus for sensing a jet of spray on a CCTV camera is provided to break the will of an illegal act or immediately take measures to stop the illegal act. CONSTITUTION: Multiple optical sensors(2) are arranged at an interval on the outer case of a CCTV camera(1). An alarm generator connected to the optical sensors compares a reference value with a light quantity received from the optical sensors and generates an alarm signal if a difference over a predetermined level is sensed.