A device for checking a wheel of a rail car for flat spots. The device includes a microelectromechanical microphone for acquiring measured air-borne sound values within a first time span. In addition, the device includes a processing unit, which is configured to determine, as a function of the measured air-borne sound values acquired, if the wheel has a flat spot. The essence of the present invention is that the device includes an acoustic waveguide. In addition, the device takes the form of a mobile device and may be situated on or in the rail car in such a manner, that air-borne sound, which is radiated at a boundary surface, as air-borne sound, by structure-borne sound propagating through the rail car, is transmitted to the microphone by the acoustic waveguide. Also described is a related method for checking a wheel of a rail car for flat spots.

A device for checking a wheel of a rail car for flat spots. The device includes a microelectromechanical microphone for acquiring measured air-borne sound values within a first time span. In addition, the device includes a processing unit, which is configured to determine, as a function of the measured air-borne sound values acquired, if the wheel has a flat spot. The essence of the present invention is that the device includes an acoustic waveguide. In addition, the device takes the form of a mobile device and may be situated on or in the rail car in such a manner, that air-borne sound, which is radiated at a boundary surface, as air-borne sound, by structure-borne sound propagating through the rail car, is transmitted to the microphone by the acoustic waveguide. Also described is a related method for checking a wheel of a rail car for flat spots.

An object of the invention is to measure an outside size of the vehicle accurately while running the vehicle. A plurality of the 1st sensors 25, 26 irradiate inspection lights to a plurality of places (4a) of the vehicle 4 of a railroad and output measurement signals which show positions and distances by receiving lights from a plurality of the places of the vehicle 4. The 2nd sensor 27, 28 or 29 irradiates an inspection light to an outside surface of the vehicle 4 and outputs a measurement signal which shows a position and a distance by receiving a light from the outside surface of the vehicle 4. The control equipment 30 or the processing equipment 41 processes the measurement signals outputted from a plurality of the 1st sensors 25, 26, detects positions and heights of a plurality of the places of the vehicle 4, processes the measurement signal outputted from the 2nd sensor 27, 28 or 29, and detects the outside size of the vehicle 4. And the control equipment 30 or the processing equipment 41 calculates amounts of a deviation of the outside surface of the vehicle 4 due to a swing of the vehicle 4 based on amounts of fluctuations of the detected positions and heights of a plurality of the places of the vehicle 4, and corrects the detected outside size of the vehicle 4 according to the calculated amounts of the deviation.

An object of the invention is to measure an outside size of the vehicle accurately while running the vehicle. A plurality of the 1st sensors 25, 26 irradiate inspection lights to a plurality of places (4a) of the vehicle 4 of a railroad and output measurement signals which show positions and distances by receiving lights from a plurality of the places of the vehicle 4. The 2nd sensor 27, 28 or 29 irradiates an inspection light to an outside surface of the vehicle 4 and outputs a measurement signal which shows a position and a distance by receiving a light from the outside surface of the vehicle 4. The control equipment 30 or the processing equipment 41 processes the measurement signals outputted from a plurality of the 1st sensors 25, 26, detects positions and heights of a plurality of the places of the vehicle 4, processes the measurement signal outputted from the 2nd sensor 27, 28 or 29, and detects the outside size of the vehicle 4. And the control equipment 30 or the processing equipment 41 calculates amounts of a deviation of the outside surface of the vehicle 4 due to a swing of the vehicle 4 based on amounts of fluctuations of the detected positions and heights of a plurality of the places of the vehicle 4, and corrects the detected outside size of the vehicle 4 according to the calculated amounts of the deviation.

The invention relates to a portable device for measuring vertical rail measurements under service to record and report excessive vertical rail movement to prevent a train from derailing. The device may be pivoting with a tilt sensor and light-weight. The device may include a microprocessor, sensors, and a display. The device may be installed on the rail. The device may sense an approaching train, automatically turn on the device, and measure the real-time vertical displacement and the maximum/minimum vertical movement of the rail while the train is operating over the rail at all speeds.

It is described a system and method to monitor railway wheels, which includes obtaining images of the railway wheel by means of stereo cameras and performing a three-dimensional and two-dimensional model of the railway wheel by means of these images. This two-dimensional model is subjected to analysis of the profile of the railway wheel, comparing it with a two-dimensional model of an ideal wheel and thus measuring the effective wear of its profile. The three-dimensional model is subjected to analysis of the surface of the railway wheel, also comparing it with a three-dimensional model of an ideal wheel and thus measuring the effective wear of its surface.

It is described a system and method to monitor railway wheels, which includes obtaining images of the railway wheel by means of stereo cameras and performing a three-dimensional and two-dimensional model of the railway wheel by means of these images. This two-dimensional model is subjected to analysis of the profile of the railway wheel, comparing it with a two-dimensional model of an ideal wheel and thus measuring the effective wear of its profile. The three-dimensional model is subjected to analysis of the surface of the railway wheel, also comparing it with a three-dimensional model of an ideal wheel and thus measuring the effective wear of its surface.

In a method for stabilizing a rail vehicle with a wheel set, the speed of the rail vehicle is changed when a critical vibration state of the wheel set occurs. An advantageous state can be achieved if the speed of the rail vehicle is changed by using a vibration state variable of the wheel set.

In a method for stabilizing a rail vehicle with a wheel set, the speed of the rail vehicle is changed when a critical vibration state of the wheel set occurs. An advantageous state can be achieved if the speed of the rail vehicle is changed by using a vibration state variable of the wheel set.

An abrasion inspection apparatus includes: a first imaging unit that is installed on a side of a track, a vehicle traveling along the track, a guide wheel being installed on a side of the vehicle, the first imaging unit imaging an inside of the track via a telecentric lens; a second imaging unit that is installed in a vehicle traveling direction with respect to the first imaging unit on the side of the track and images the inside of the track via a telecentric lens; an image acquisition unit that acquires an image which is an image of a boundary of the guide wheel captured by the first imaging unit and is an image of a boundary on a first direction side in the vehicle traveling direction and an image which is an image of the boundary of the guide wheel captured by the second imaging unit at the same time as the capturing of the image by the first imaging unit and is an image of a boundary on an opposite side to the first direction side; and a guide wheel detection unit that detects an abrasion situation of the guide wheel according to a position of a boundary indicated in the images acquired by the image acquisition unit.