Security system

A security system comprising:

• an object detecting unit which emits light or a radio wave from a building to a predetermined area outside the building, receives a wave reflected from an object, and detects the object on the basis of the reflected wave;
• and
• an area intrusion judging unit for judging whether or not the object will intrude into the predetermined area on the basis of output of the detecting unit;
• wherein said object detecting unit includes a plurality of object detecting devices installed in a multidirectional manner so as to cover the predetermined area which is within a range of 360°.

A security system comprising:

• an object detecting unit which emits light or a radio wave from a building to a predetermined area outside the building, receives a wave reflected from an object, and detects the object on the basis of the reflected wave;
• and
• a building intrusion predicting unit for tracking the object in the predetermined area on the basis of output of the detecting unit to predict whether or not the object will intrude into the building;
• wherein said object detecting unit has object detecting devices installed on a wall surface of the building so as to cover the predetermined area which is within a range of 360°.