| 摘要 |
A monitoring system for the trailer of a tractor/trailer unit, comprising a secure housing (22, Figs 2 and 3) on the trailer unit, accessible by key, keyboard or the like only to an authorized person, the housing accommodating a function control key panel 100, a microprocessor 102, micro-electronics, a battery 108 rechargeable from the tractor unit, sensors 110 for detecting unauthorized trailer movement and/or access to the load space, and alarm means 112 operable if the sensor means produces abnormal signals. The sensors include ones associated with the front-end land legs 106 of the trailer with the load space of the trailer and with the wheels of the trailer. |
