| 摘要 |
A security system for a trailer 14 comprises: a detection arrangement to detect activity relating to the trailer; a communication arrangement 4 for two-way communication between the trailer and a remote control centre; and a security arrangement which is selectively activatable, wherein: the communication arrangement is operable to receive an authorisation message indicating whether activity of a certain type is authorised or unauthorised; and upon detection by the detection arrangement of activity relating to the trailer, if an authorisation message is received indicating that the activity is unauthorised, the security arrangement is activated. The detection arrangement may include door sensors 12, to detect whether a door is opened, and/or sensors detecting operation of an electrical 24 or fluid 22 connection, and/or the operation of a parking brake 10. The signal received from the remote centre may be in response to a signal being sent from the trailer, or it may be in advance of detecting the activity. If an unauthorised activity is detected a camera and/or an alarm may be triggered, and the brakes of the trailer may be locked on. |
