Abstract: A system includes at least one application device, a control unit, at least one detection device, and at least one processor configured to be disposed on-board a vehicle system. The at least one application device is configured to be at least one of conductively or inductively coupled with at least one conductive track of a route traveled by the vehicle system. The control unit is configured to control the at least one application device to electrically inject at least one examination signal into the conductive tracks. The at least one detection device is configured to detect the examination signal passing through a test loop. The at least one processor is configured to identify a failure of the vehicle to adequately shunt electrical signals between the conductive tracks based upon the examination signal detected by the at least one detection device.

Abstract: A system includes at least one signal light having at least one lamp. The system further includes a control device electrically connected to the at least one lamp by a conductive cable. The at least one lamp is configured to flash in response to the loss of an audio signal generated by the control device.

Abstract: A vibration monitoring system includes an acoustic device that outputs an analog signal to a fiber cable for calibration and location verification. The acoustic device utilizes GPS or communication from wayside bungalow equipment to verify GPS location or real-time clock information. The wayside bungalow contains communication equipment that interfaces with the acoustic device and relays health information to a sensing processor. The sensing processor is configured to detect the acoustic signal output by the acoustic device at a known location and verifies that the cable and device have not moved location by comparing the signal level received against a threshold stored in memory. When the threshold is exceeded, the sensing processor sends an alert that the fiber optic cable or acoustic device at the location have changed.

Abstract: A method for predicting failure of a crossing warning system is disclosed. The method includes monitoring an electrical characteristic of a first route when an electric current is injected into the first route. The first route has a crossing intersection with a second route and a crossing signal at the crossing intersection. The electrical characteristic is monitored to detect when a vehicle is approaching the crossing intersection on the first route and to determine when to activate the crossing signal at the crossing intersection. The method also includes identifying one or more changes in the electrical characteristic of the first route, and, based on the one or more changes that are identified, predicting a failure mode of the first route that interferes with detection of the vehicle approaching the crossing intersection.

Abstract: A route examining system includes first and second application devices, a control unit, first and second detection units, and an identification unit. The first and second application devices are disposed onboard a vehicle traveling along a route having conductive tracks. The control unit controls injection of a first examination signal into the conductive tracks via the first application device and injection of a second examination signal into the conductive tracks via the second application device. The first and second detection units monitor electrical characteristics of the route in response to the first and second examination signals being injected into the conductive tracks. The identification unit examines the electrical characteristics of the conductive tracks in order to determine whether a section of the route is potentially damaged based on the electrical characteristics.

Abstract: A system includes at least one application device, a control unit, and at least one processor. The at least one application device is conductively or inductively coupled with at least one of a first conductive track or a second conductive track. The control unit is configured to control supply of electric current from a power source to the at least one application device to electrically inject at least one examination signal into the conductive tracks. The at least one processor is configured to monitor the one or more electrical characteristics of at least one of the first or second conductive tracks, and to identify a construction feature of the route based on the one or more electrical characteristics, wherein the construction feature corresponds to a man-made aspect of the route.

Abstract: A system for examining a route and/or determining information about the route and/or a vehicle system are provided. The system injects a first electrical examination signal into a conductive route from onboard a vehicle system traveling along the route and detects a first electrical characteristic of the route based on the first electrical examination signal. Using a route examining system that also is configured to detect damage to the route based on the first electrical characteristic, a first frequency tuned shunt in the route is detected based on the first electrical characteristic.

Abstract: A route examining system includes first and second detection units and an identification unit. The first and second detection units are configured to be disposed onboard a vehicle system traveling along a route having plural conductive tracks. The first and second detection units are disposed at spaced apart locations along a length of the vehicle system. The first and second detection units are configured to monitor one or more electrical characteristics of the conductive tracks in response to an examination signal being electrically injected into at least one of the conductive tracks. The identification unit includes one or more processors configured to determine that a section of the route includes an electrical short responsive to the one or more electrical characteristics monitored by the first and second detection units indicating that the examination signal is received by only one of the first and second detection units.

Abstract: Systems for examining a route inject one or more electrical examination signals into a conductive route from onboard a vehicle system traveling along the route, detect one or more electrical characteristics of the route based on the one or more electrical examination signals, and detect a break in conductivity of the route responsive to the one or more electrical characteristics decreasing by more than a designated drop threshold for a time period within a designated drop time period. Feature vectors may be determined for the electrical characteristics and compared to one or more patterns in order to distinguish between breaks in the conductivity of the route and other causes for changes in the electrical characteristics.

Abstract: A system includes a determination module and a communication module. The determination module is configured to be located onboard a first vehicle that travels along a first route including a crossing corresponding to an intersection of the first route with a second route. The determination module is configured to be communicatively coupled with a remote crossing module that is configured to impede travel of a second vehicle through the crossing, and to identify an upcoming stop at a station within a range of a track detection system associated with the remote crossing module. The communication module is configured to communicatively couple the determination module to the remote crossing module, and to transmit an inhibit request message to the remote crossing module. The inhibit request message is configured to prevent the remote crossing module from activating a warning when the first vehicle is stopped at the station.

Abstract: A system may include a coded test signal transmission system configured to transmit a unique coded test signal along a route, and a coded test signal receiving system configured to receive the unique coded test signal along the route. The unique coded test signal received by the coded test signal receiving system is used to determine one or more characteristics of the route.

Abstract: A method for calibrating a track circuit is provided. The track circuit includes a transmit processing unit, a receive processing unit, and a plurality of rails coupled in series to form a track section having a first end and a second end. The transmit processing unit is coupled to the track section adjacent the first end. The receive processing unit is coupled to the track section adjacent the second end. The method includes operating the transmit processing unit so that a first voltage is applied to the track section, operating the receive processing unit to detect a first current signal, and if a parameter of the first current signal is not within a predetermined acceptable range, then communicating with the transmit processing unit so that the transmit processing unit applies a second voltage to the track section, the second voltage having a different magnitude than the first voltage.

Abstract: Systems and methods for examining a route inject one or more electrical examination signals into a conductive route from onboard a vehicle system traveling along the route, detect one or more electrical characteristics of the route based on the one or more electrical examination signals, apply a filter to the one or more electrical characteristics, and detect a break in conductivity of the route responsive to the one or more electrical characteristics decreasing by more than a designated drop threshold for a time period within a designated drop time period. Feature vectors may be determined for the electrical characteristics and compared to one or more patterns in order to distinguish between breaks in the conductivity of the route and other causes for changes in the electrical characteristics.

Abstract: A system includes at least one application device, a control unit, and at least one processor. The at least one application device is conductively or inductively coupled with at least one of a first conductive track or a second conductive track. The control unit is configured to control supply of electric current from a power source to the at least one application device to electrically inject at least one examination signal into the conductive tracks. The at least one processor is configured to monitor the one or more electrical characteristics of at least one of the first or second conductive tracks, and to identify a construction feature of the route based on the one or more electrical characteristics, wherein the construction feature corresponds to a man-made aspect of the route.

Abstract: A system includes at least one application device, a control unit, at least one detection device, and at least one processor configured to be disposed on-board a vehicle system. The at least one application device is configured to be at least one of conductively or inductively coupled with at least one conductive track of a route traveled by the vehicle system. The control unit is configured to control the at least one application device to electrically inject at least one examination signal into the conductive tracks. The at least one detection device is configured to detect the examination signal passing through a test loop. The at least one processor is configured to identify a failure of the vehicle to adequately shunt electrical signals between the conductive tracks based upon the examination signal detected by the at least one detection device.

Abstract: A method includes receiving an absolute time associated with movement of a vehicle system, modifying the absolute time into a relative time, and controlling one or more warning devices using the relative time. A system includes a crossing module configured to receive an absolute time associated with movement of a vehicle system. The crossing module is configured to modify the absolute time into a relative time and to control one or more warning devices using the relative time.

Abstract: There is provided a voltage or current sensing device. An exemplary voltage or current sensing device includes a drive circuitry configured to deliver a drive current to a magnetic core operably coupled with a conductor, for driving the core to cyclical magnetic saturation. The device also includes sense circuitry configured to receive a voltage signal corresponding to an application current in the conductor. The device also includes signal processing circuitry configured to sample the voltage signal, wherein a first sample is in phase with the drive current and a second sample is out of phase with the drive current. The device also includes a feedback loop configured to deliver a compensation current to the magnetic core, wherein the compensation current is configured to balance the magnetic core and wherein the compensation current is based at least in part on the first sample in phase with the drive current.

Abstract: A system includes a timing determination module configured to be disposed onboard an approaching vehicle system during travel of the approaching vehicle system along a first route toward a crossing between the first route and a second route. The timing determination module is configured to determine one or more arrival times of the approaching vehicle system to reach the crossing and to repeatedly communicate notification messages having the one or more arrival times to a remote crossing system that is configured to activate one or more warning devices disposed at or near the crossing to notify other vehicles on the second route that the approaching vehicle system is approaching the crossing along the first route. The timing determination module is configured to determine the one or more arrival times at different respective locations along the first route as the approaching vehicle system travels toward the crossing.

Abstract: A system includes first and second application devices, a control unit, and at least one processor. The first and second application devices are configured to be at least one of conductively or inductively coupled with one of the conductive tracks. The control unit is configured to control the first and second application devices in order to electrically inject a first examination signal into the conductive tracks via the first application device and a second examination signal into the conductive tracks via the second application device. The at least one processor is configured to monitor one or more electrical characteristics of the first and second conductive tracks in response to the first and second examination signals being injected into the conductive tracks; and to identify a type of fault based upon the one or more electrical characteristics of the first and second conductive tracks.

Abstract: A method for predicting failure of a crossing warning system is disclosed. The method includes monitoring an electrical characteristic of a first route when an electric current is injected into the first route. The first route has a crossing intersection with a second route and a crossing signal at the crossing intersection. The electrical characteristic is monitored to detect when a vehicle is approaching the crossing intersection on the first route and to determine when to activate the crossing signal at the crossing intersection. The method also includes identifying one or more changes in the electrical characteristic of the first route, and, based on the one or more changes that are identified, predicting a failure mode of the first route that interferes with detection of the vehicle approaching the crossing intersection.