| 摘要 |
This invention relates to a security system 10 for detecting unauthorised access to a vehicle. The security system 10 comprises sensing means 14, in the form of a plurality of pairs of transmitters 14.1 and receivers 14.2, disposed on the outside of the vehicle 12. Beams 18 are transmitted and received between corresponding transmitters 14.1 and receivers 14.2 and thus delineate a restricted zone 16 surrounding the outer periphery of the vehicle 12. The security system 10 further comprises means responsive to the sensing means 14 for registering detection of unauthorised to the restricted zone 16. The means responsive to the sensing means 14 is in the form of a controller 24, which is activated by remote control 26 and deactivated by means of a keypad 28 disposed inside the vehicle 12. |
