System and methods are provided for warning a worker of a rail vehicle, or an operator of the rail vehicle of the worker. The system includes a worker device, a vehicle device, and a central server. The devices and server operate on one or a combination of actual or simulated satellite navigational signals, and beacon signals to determine the position of the devices, to generate a warning. The position determination may prioritize beacon signals over satellite navigation signals. The position determination may involve correcting a calculated position based on a measured power level of the beacon signal received from the beacon transmitter, an elapsed time since a previous beacon signal was last received by the device from the beacon transmitter, an elapsed time since a previous satellite navigation signal was received by the device, or an accuracy of the position of the device based on the satellite navigation signal.

System and methods are provided for warning a worker of a rail vehicle, or an operator of the rail vehicle of the worker. The system includes a worker device, a vehicle device, and a central server. The devices and server operate on one or a combination of actual or simulated satellite navigational signals, and beacon signals to determine the position of the devices, to generate a warning. The position determination may prioritize beacon signals over satellite navigation signals. The position determination may involve correcting a calculated position based on a measured power level of the beacon signal received from the beacon transmitter, an elapsed time since a previous beacon signal was last received by the device from the beacon transmitter, an elapsed time since a previous satellite navigation signal was received by the device, or an accuracy of the position of the device based on the satellite navigation signal.

A method for safe supervising train integrity includes: (a) acquiring first position data of the first carriage via a first tracking unit which is installed on-board of a first carriage and acquiring second position data of a second carriage via a second tracking unit which is installed on-board of the second carriage, wherein the position data is related to a rail route coordinate system; (b) determining a deviation between a reference value which depends on the length of the train and a position value which depends on position data of at least one of the tracking units; (c) detecting whether train integrity is given by analyzing the deviation; (d) repeating steps a) through c); wherein the tracking units are part of on-board units of an automatic train protection system. Thus a cost-efficient method for supervising train integrity which complies with safety level SIL4 can be realized.

A method for safe supervising train integrity includes: (a) acquiring first position data of the first carriage via a first tracking unit which is installed on-board of a first carriage and acquiring second position data of a second carriage via a second tracking unit which is installed on-board of the second carriage, wherein the position data is related to a rail route coordinate system; (b) determining a deviation between a reference value which depends on the length of the train and a position value which depends on position data of at least one of the tracking units; (c) detecting whether train integrity is given by analyzing the deviation; (d) repeating steps a) through c); wherein the tracking units are part of on-board units of an automatic train protection system. Thus a cost-efficient method for supervising train integrity which complies with safety level SIL4 can be realized.

A first antenna group includes one first antenna disposed at one end of a leading car, and another first antenna disposed at one end of a following car. A second antenna group includes one second antenna disposed at the one end of the leading car, the position where the one second antenna is disposed being different from the position where the one first antenna is disposed in a direction orthogonal to a travel direction of the leading car, and another second antenna disposed at the one end of the following car. A measurement unit measures radio wave strength between a pair of first antennas during communication via the first antenna group. A controller is enabled to make a switch from the first antenna group to the second antenna group when the radio wave strength is less than a predetermined value.

A first antenna group includes one first antenna disposed at one end of a leading car, and another first antenna disposed at one end of a following car. A second antenna group includes one second antenna disposed at the one end of the leading car, the position where the one second antenna is disposed being different from the position where the one first antenna is disposed in a direction orthogonal to a travel direction of the leading car, and another second antenna disposed at the one end of the following car. A measurement unit measures radio wave strength between a pair of first antennas during communication via the first antenna group. A controller is enabled to make a switch from the first antenna group to the second antenna group when the radio wave strength is less than a predetermined value.

Generally, a system including an imaging device and a processing unit is disclosed. The imaging device may be configured to acquire a plurality of datasets of corresponding plurality of image frames by performing corresponding plurality of image frame handling cycles. The processing unit may be configured to define a special region of interest (SROI) in each of at least some of the plurality of the image frames acquired by the imaging device, based on the datasets of the respective image frames. The imaging device may be further configured to acquire at least one partial dataset of the SROI, during each of at least some of the plurality of image frame handling cycles and within a residual time between an end of an image frame acquiring time and an end of the respective image frame handling cycle.

Generally, a system including an imaging device and a processing unit is disclosed. The imaging device may be configured to acquire a plurality of datasets of corresponding plurality of image frames by performing corresponding plurality of image frame handling cycles. The processing unit may be configured to define a special region of interest (SROI) in each of at least some of the plurality of the image frames acquired by the imaging device, based on the datasets of the respective image frames. The imaging device may be further configured to acquire at least one partial dataset of the SROI, during each of at least some of the plurality of image frame handling cycles and within a residual time between an end of an image frame acquiring time and an end of the respective image frame handling cycle.

A system includes a locator device and one or more processors operably connected to the locator device. The locator device determines a trailing distance between a trailing vehicle system that travels along a route and a leading vehicle system that travels along the route ahead of the trailing vehicle system in a same direction of travel. The one or more processors compare the trailing distance to a first proximity distance relative to the leading vehicle system. In response to the trailing distance being less than the first proximity distance, the one or more processors set a permitted power output limit for the trailing vehicle system to be less than a maximum achievable power output for the trailing vehicle system, the permitted power output limit being set based on a power-to-weight ratio of the leading vehicle system.

A system includes a locator device and one or more processors operably connected to the locator device. The locator device determines a trailing distance between a trailing vehicle system that travels along a route and a leading vehicle system that travels along the route ahead of the trailing vehicle system in a same direction of travel. The one or more processors compare the trailing distance to a first proximity distance relative to the leading vehicle system. In response to the trailing distance being less than the first proximity distance, the one or more processors set a permitted power output limit for the trailing vehicle system to be less than a maximum achievable power output for the trailing vehicle system, the permitted power output limit being set based on a power-to-weight ratio of the leading vehicle system.