Abstract: A system for monitoring alignment of a signal lamp includes at least one sensor and threshold detection circuitry. The sensor is positioned about the signal lamp and is configured to measure at least one of azimuthal and elevational movement of the signal lamp and generate an electrical signal. The threshold detection circuitry is configured to receive signals representative of the azimuthal and elevational movement of the signal lamp from the sensor. The threshold detection circuitry determine a change in alignment of the signal lamp according to at least one of the azimuthal movement signals and the elevational movement signals.

Abstract: A system for monitoring the condition of a lighting system comprises a lamp assembly where a lamp is disposed in a housing and a lens is disposed adjacent to the lamp, a conductor disposed on the lens and adapted to lose electrical continuity upon occurrence of a crack in the lens. Furthermore, a monitoring system is coupled to the conductor and is configured to detect the loss of electrical continuity in the conductor, which is indicative of the occurrence of a crack in the railroad signal lens.

Abstract: There is provided a method of facilitating communication in an electrical power network having a complex impedance. The method includes modifying the complex impedance, and determining whether the modifying affected a quality of the communication.

Abstract: Circuits are provided for transmitted reference spread spectrum systems using a noise-like digital sequence with delayed replica. The circuits produce the digital spreading sequences at extremely high speed, and are capable of providing a great degree of signal spreading. A first embodiment is composed of a low speed section and a high-speed section. This embodiment allows for greater power efficiency without sacrificing sequence speed. In addition, the embodiment also allows shaping of the spectrum of the high-speed digital sequence. Further, this embodiment generates an m-sequence and its near delay by storing decimated pieces of the entire m-sequence over a plurality of end-around circulating shift registers or so-called ring counters. The ring counters can be run at low speed and there is no exclusive-oring operation. A time-delayed transmitted reference spread spectrum transmitter is provided using digital noise generators that are capable of very high speed operation.

Abstract: A method for calibrating cameras is provided. The method includes moving a point of light on a first A first and second camera are capable of generating a firs frame of the point of light and a second frame of the point of light. The respective points of light are in a first field of view and a second field of view of the first camera and the second camera. The method includes determining a relative position between the first camera and the second camera based in part of the first frame and the second frame.

Abstract: A method and apparatus are described for a networked lighting system that may be controlled either remotely or locally by a power line communication (PLC) link. The components of the system, addressable lamp ballasts and addressable wall switches, replace their conventional counterparts. The resulting networked lighting system implemented with these components is controlled remotely from a centralized building control center. A particular room may be controlled by the building control center or locally by a wall switch. The invention requires no rewiring of the building's wiring plant, because the addressable components are direct electrical replacements, and installation of the system, therefore, takes a minimum amount of time.

Abstract: A low cost and easy to assemble communicating utility meter provides selectable measurement, calibration, display, and communications means so as to be re-configurable based on several factors including; harmonic content of the power signal measured, LCD display alternatives, time of use measurements, bandpass filter settings, power quality measurements, PLC communications. alternatives, radio frequency communications alternatives, optical communications alternatives, and hard wire communications alternatives.

Abstract: A method and apparatus are described for a networked lighting system that may be controlled either remotely or locally by a power line communication (PLC) link. The components of the system, addressable lamp ballasts and addressable wall switches, replace their conventional counterparts. The resulting networked lighting system implemented with these components is controlled remotely from a centralized building control center. A particular room may be controlled by the building control center or locally by a wall switch. The invention requires no rewiring of the building's wiring plant, because the addressable components are direct electrical replacements, and installation of the system, therefore, takes a minimum amount of time.