Abstract: A communication system for a distributed locomotive power/brake control system for a railroad train having a lead locomotive and one or more remote locomotives. Command and status signals are communicated over the system between the lead and remote locomotives. Each communicated message includes an information segment comprising the command or status information, and an error control segment for detecting errors in the information segment. The error control segment further comprises cyclic redundancy code words and parity bits formed according to the horizontal or vertical parity of the information segment and the cyclic redundancy code words.

Abstract: A method is described for testing a train control system configured to control at least two locomotives. The train control system includes a control unit on each locomotive and is configured to control the locomotives using communication links between the control units. The method includes establishing communication between a testing device and a first locomotive control unit, and emulating a second locomotive control unit using the testing device. The testing method allows control system testing to be performed using a hand-held testing device in place of a second locomotive and facilitates testing of repeaters.

Abstract: A communication system for a distributed locomotive power/brake control system for a railroad train having a lead locomotive and one or more remote locomotives. Command and status signals are communicated over the system between the lead and remote locomotives. Each communicated message includes an information segment comprising the command or status information, and an error control segment for detecting errors in the information segment. The error control segment further comprises cyclic redundancy code words and parity bits formed according to the horizontal or vertical parity of the information segment and the cyclic redundancy code words.

Abstract: A three dimensional display system comprises a display volume selectively partitioned into distinct display regions, a display surface for scattering light beams from the display volume, at least two optical scanners for modulating the light beams and for directing the light beams to the display surface within each distinct display region respectively, and a display controller. The display controller comprises a world coordinate interface for inputting world coordinates, a data processor for transforming the world coordinates into view coordinates and device coordinates, and an optical scanner controller for sensing and controlling the motion of the display surface and for outputting the device coordinates to the optical scanners to generate a three dimensional image within the display volume.

Abstract: A system for generating three dimensional images includes a data processor which generates a first data stream representing coordinates along a first axis, a second data stream representing coordinates along a second axis, and a third data stream representing intensities of optical beams. A demultiplexer transforms the first, second, and third data streams into multiple control signals each comprised of elements of the first, second and third data streams. The system further includes an optical energy source for generating an optical signal, and an optical beam steering system which divides the optical signal into multiple optical beams which are individually deflected and intensity modulated under the control of one of the control signals. The optical beams then are recombined and steered to reflect off the reflecting surface of a reflective structure, resulting in the presentation of a 3D image.