| 摘要 |
The invention provides a method and apparatus for using the power line carrier of vehicles as a data bus. The scope of this invention is not limited to vehicles, but can be implemented in other applications that either have a power source or wired to one. In one embodiment, the invention uses the existing power line of a HDTTU to transmit data. An electrical component is coupled to the power line and transmits detectable signals on the power line. A second electrical component is also coupled to the power line and detects and decodes the detectable signals. In one embodiment, the signals are used to generate binary words that code information. In another embodiment, the power line of a HDTTU is used to carry sensor/warning signals from sensors placed on the vehicle to a display panel on the dashboard. Sensors are coupled to a control box which is used to convert the signals to a form that can be carried on the existing power line. An existing electrical coupling connects the power line from the trailer to the cab. In the cab, a second control box is coupled to the power line and converts the detected signals to a textual display, graphical display, or audio-visual display on the dashboard. This system obviates the need for additional conductors from the trailer junction box to the cab, as well as for additional junction boxes and conductors between the cab and the trailer. This is because the present invention uses the existing power line as a carrier of data, and this existing power line runs from the front of the cab to the rear of the trailer. This simplified system that uses existing power line wires as a data bus is easier to install and more likely to be used, increasing vehicle and highway safety.
|
