| 摘要 |
A security system is disclosed which is suitable for a vehicle 10. The security system comprises a microwave transducer 16 which is arranged to provide an intrusion signal which is indicative of the presence of an intruder in the protected area 10. The intrusion signal is arranged to cause the activation of an active infra-red transducer 18, 20 which is used to check the protected area and to confirm whether the intrusion signal of the microwave transducer 16 is a false alarm. A security controller 12 is arranged to only activate an alarm 14 if the active infra-red transducer 18, 20 confirms the validity of the intrusion signal of the microwave transducer 16. |
