System to protect boats, holiday homes, kiosks, churches, museums or galleries; has hidden unit with movement sensor and camera and remote control receiver with monitor to display images

摘要

The system has a hidden or disguised stationary unit at the site (A) to be monitored, which has an infrared camera (1), a movement sensor unit (2), an image signal transmitter (3), a central control component (4) and a remote control receiver (5). A mobile operation part (B) communicating with the stationary unit has a remote control transmitter (6) and an image signal receiver (7). The camera has an internal image memory. The movement sensor generates a signal in the case of a detection event. The image signal transmitter is connected to the output of the camera. The signal input of the central component is connected to the signal output of the movement center unit. Control cables (a3,a4) connect the central component to the camera and the image signal transmitter, so that the movement sensor signal activates the camera. The remote control receiver is connected by control cables (a4,a5) to the image signal transmitter and the central component and can be controlled at a safe distance and activates the image signal transmitter on reception of a request transmission pulse (f1), to send saved images. The remote control receiver is arranged so that it sends a request transmission pulse at a predetermined carrier frequency from a safe distance. The image signal receiver is connected to a monitor (7'), and is arranged to receive, demodulate and display the transmitted image signals.