| 摘要 |
A trailer includes a frame formed of metal and a door seated within the fram e. The door is capable of opening and closing relative to the frame. A system is provide d for use on the trailer and includes a sensor mounted on the door and a data concentrator. T he sensor includes a sensing element, a transceiver and a microcontroller connected to the transceiver. The sensing element is connected to the microcontroller. The microcontroller is configur ed to receive information from the sensor and use the transceiver to wirelessly transmit information regarding the status of the door. The data concentrator includes a transceiver and a processor connected to the transceiver. The data concentrator is configured to wirelessly receive information regarding the status of the door from the sensor. The sensor is capable of sensing the metal material of the frame for use in determining information as to whether said door is open or closed.
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