US Patent 7242296 Safe intelligent container

An intelligent transportation container is composed of a container body, door and electronic intelligent modules installed in the container. The electronic intelligent modules are installed in the door, and includes a door displacement transducer for monitoring the door movement and output of signals. The door has an aperture corresponding to the antenna on the electronic intelligent module, and the antenna passes through the antenna aperture and extends out of the container body. Relative movement of or between two doors, or the door movement relative to the doorcase, are used to monitor whether the door has been opened.