Method of monitoring rail contact with wheel

FIELD: transport.

SUBSTANCE: invention relates to a method of monitoring contact between the wheel and the rail of the vehicle. Method of monitoring contact between the wheel and the rail of the vehicle includes the following stages: recording of vertical and/or lateral acceleration of at least one wheel (10) of the vehicle; storing the recorded acceleration together with associated angular and with associated geographical position of wheel (10); identification of acceleration events exceeding the predetermined parameter; classification of each event using computer physical model (22) of wheel (10). That is followed by frequency analysis of events associated with data of angular positions and/or with data of geographical positions of wheel (10), and if the frequency of at least one of the said events in one associated angular and/or associated geographic position exceeds the predetermined threshold, then wheel (10) and/or rail track (11) in the given geographical position are checked.

EFFECT: as the result railway operators can faster detect defects of wheels and rails.

6 cl, 4 dwg

 



 

Same patents:

FIELD: transport.

SUBSTANCE: invention relates to railway vehicle bogie (3) with at least one mounted axle (4). Note here that wheels (8) of said mounted axle (4) are rigidly coupled by axle (6) and feature wheel profile approximating to conical shape. Transducers (10) are arranged at turning bogies (3). Signals are isolated from those generated by transducers (10) which correspond to sinusoidal run of bogie (3) mounted axle (4) based on the profile approximating to conical shape of wheels (8). In compliance with this invention, sinusoidal run frequency (f) relative to boundary conditions is defined as appropriate vehicle speed (v) and compared with the magnitude or range of said sinusoidal run frequency (f) inherent in available boundary conditions and stored in memory. Note here that deflection of sinusoidal run frequency (f) from the latter. Invention relates also to device that implements said method.

EFFECT: higher accuracy and quality of control.

14 cl, 5 dwg

FIELD: transport.

SUBSTANCE: invention relates to metering equipment and can be used at railway vehicles for contactless measurement of wheels profile with the help of mobile laser triangulation transducers. Proposed device comprises at least five mobile laser triangulation transducers 3-7 of which: 1st, 2nd and 3rd generate parallel probing rays. Note here that 3rd, 4th and 5th transducers are relatively arranged to define center of gravity of the wheel. Invention covers also the method of railway wheel profile measurement incorporating the algorithm to correct actual magnitudes of measured profiles with allowance for arbitrary orientation of said transducers.

EFFECT: expanded operating performances, ease of use.

4 cl, 13 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway transport and can be used for control over mounted axle conditions in motion. In compliance with this method, after wheel 9 runs on rail joint 4 circular wave stars propagating over wheel 9 to produce acoustic wave to be emitted therefrom and recorded by converter 1. Said converter converts acoustic wave into electric signal. In the absence of cracks signal duration and frequency will have a definite magnitude. In case there are cracks in said wheel said parameters, that is duration and frequency decrease to indicate inadmissibility of further use of said wheel. Then, wheel 9 rolls on section 5 its length in this case being equal to half the circumference of the wheel whereat acoustic pickups check the section surface for tread quality.

EFFECT: simplified design, better check quality, lower power consumption.

8 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention relates to flaw inspection and nondestructive checks. Invention consists in using pulses of surface electromagnetic waves radiated forward and/or backward relative to train direction, registering reflection of said pulses from irregularities of the track and defining type of track and/or rolling stock defects from character of said irregularities.

EFFECT: detection of dangerous macroscopic defects at distance exceed stopping distance and registration of derailment.

2 dwg

FIELD: measurement equipment.

SUBSTANCE: invention refers to measurement equipment and is intended for automatic monitoring of technical state of railway rolling stock during its operation. Monitoring system of tread surface of wheel of railway wheel pair includes two groups of sensors of dynamic loads, sensors of monitoring zone, group of temperature sensors of crushed-stone ballast, an interface unit and a comparison unit. The system also includes direct Fourier transformation units, a calculation unit of average amplitude-frequency characteristics, units of the first correction of amplification coefficients, units of the second correction of amplification coefficients, a correction unit of amplification coefficients of dynamic load sensors, at the point of application of external force to the sensors, and an inverse Fourier transformation unit.

EFFECT: improving reliability of determination of defective wheel pairs.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to diagnostics of rolling stock axle box roll surfaces. Proposed method consists in that in defining defect type, isolation of creep against background of other roll surface defects is performed by comparing and isolating maximum acoustic emission signal from several bursts of continuous signals for time equal to axle box period of revolution. Defect size allows defining axle box roll surface conditions.

EFFECT: accelerated and valid control.

1 dwg

FIELD: transport.

SUBSTANCE: proposed method consists in defining tolerable lengthwise and crosswise clearances in bogie frame axle box guides. In compliance with proposed method, at least, two acoustic emission transducers are mounted on whatever surface of left and right rails, except for rail head surface, along the axis perpendicular to track direction, at the distance between each other equal to mounted axle weaving section period L defined by the formula: where n is roll surface slope; s is half the distance between roll circles, m; r is wheel diameter, m; π equals 3.14. Arc segment of mounted axle wheel flange interacting with rail head inner face is calculated by the following formula: p = π · d · N · Δt, where: P is arc segment in mm, N is mounted axle revolutions per second, Δt is time of burst of continuous acoustic emission signals with maximum amplitude in s, π equals 3.14, D is wheel diameter in mm. Calculated arc segment of contact (friction) of wheel flange with rain head inner face is compared to tolerable standard magnitude.

EFFECT: higher validity and safety.

FIELD: transport.

SUBSTANCE: invention relates to railway vehicles. Proposed system 10 comprises device 11 to input data in said system, processor 12 receiving measured sizes 14 of rail wheel, memory 16 interacting with processor 18 that stores rail wheel straightening rules base, logic 20 used by said processor to access said base, and user graphic interface. Interactive graphic interface has wheel straightening window comprises wedge selection interactive section to allows user to select and reject wedge selection, and to display wheel straightening result in response to wedge selection. Proposed method serves to automatically output wheel straightening recommendations proceeding from wheel measurement results. Said wheel straightening window includes sections of losses caused by wheel machining. System 10 to output wheel straightening recommendations includes interactive graphical interface with its wheel straightening window including section of loses caused by first, second and third machining jobs.

EFFECT: proposed method serves to automatically output wheel straightening recommendations proceeding from wheel measurement results.

27 cl, 2 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway transport, particularly, to traffic safety ACS. Proposed system comprises synchronisation unit to calculate train mounted axles, identifying types of rolling stock to generate synchronisation signals, unit to detect cars with unloaded mounted axles connected to strain gages to detect cars with negative dynamics, and unit to define angle of mounted axle misalignment including inductive transducers to reveal mounted axles with angle of attack exceeding threshold value. System comprises floor, station and intermediate equipment.

EFFECT: higher accuracy and validity.

6 cl, 1 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway transport, namely to control over locomotive wheel pair wheels and may be used for flaw detection in all-rolled wheels. Proposed method consists in irradiating wheels by transducer rays and receiving reflected signals by transducer receivers for further combined processing of transducer data and determining wheel diameter by wheel rolling surface and angle of contact between wheel and rail. Said transducers provide two profiles on wheel inner face to determine face position in space and to determine angle of contact between wheel and rail, and three profiles from wheel rolling surface with at least three points located 70 mm from inner face plane. Obtained points are used to calculate diameter of wheel as circumference running through three points in space. Circle chord length between points is considered to be maximum by taking two profiles from wheel rolling surface and third profile from wheel section closest to rail.

EFFECT: better control over wheel wear, higher safety.

2 dwg

FIELD: instrumentation.

SUBSTANCE: present group of inventions relates to measuring equipment, and can be used to check the railroad, in particular to determine deviation of the railroad from the design position. Method of check of spatial position of railroad means that using the receiving and analyzing systems two images of space adjacent to the railroad are obtained. Using the processing and control block the reference mark is detected on the obtained images, and coordinates of the reference elements of the reference mark are determined by preliminary measurements of the mutual spatial position of the check elements. Then displacement of the check elements relatively to the base point of the devices coordinate system in vertical, longitudinal and transverse directions are determined, angles of rotation of the reference mark around the vertical and longitudinal axes, as well as angle of system rotation relatively to the transverse axes is measured. Set of obtained values of displacement of each check element relative to the datum point of the devices coordinate system is compared with the pre-measured mutual spatial position of the mass elements. Based on the results of such comparison the displacements of the reference mark in vertical, longitudinal and transverse directions are determined. Correction of the obtained displacements is made considering the obtained angles of rotation, and railroad position is determined.

EFFECT: reduced error of determination of the railroad position.

2 cl, 1 dwg

FIELD: electricity.

SUBSTANCE: longitudinal stress values are defined continuously during the motion of a rolling stock at the mechanical interaction of a rolling railroad wheel with a rail when mechanical oscillations are excited at tested sections of rail bars with recording, converting of the received oscillations to acoustic oscillations with signal amplification, and at the analysis of spectrum of the excited oscillations in frequency and amplitude depending on a value of longitudinal mechanical stress at the rail bar sections. According to results of data processing changes in the spectrum of the excited oscillations are analysed and sections of railroad tracks are identified with deviations in an amplitude-frequency curve in a real-time mode.

EFFECT: increased efficiency of control and safety of train traffic.

3 dwg

FIELD: transport.

SUBSTANCE: diagnostic device of control elements of a rolling stock derailing control device (RSDCD) includes an electronic unit for the detection and research of defects based on a magnetic metal memory method (MMM) with a ferroprobe converter (FPC) and an electronic unit for the detection and research of defects by means of an eddy current method with an eddy current converter (ECC). The device also has an electronic recording and processing unit connected to the electronic unit for the detection and research of defects based on MMM method and the electronic unit for the detection and research of defects by means of the eddy current method.

EFFECT: increasing safety of railroad movement.

16 cl, 5 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to non-destructive testing devices and is intended to determine coordinates of an inspection sensor when searching defects. A general-purpose coordinate device for a manual defect detector is arranged on a test object and includes at least one inspection sensor, and it is made in the form of a flat frame of an open type, the free ends of which are installed with a possibility of being turned on supporting fasteners fixed on the test object. With that, on the frame there are two encoders arranged, each of which is provided with a cable connected to a cassette holder located between the encoders, in which a cassette is installed and provided with at least one inspection sensor with a possibility of its movement along the test object surface.

EFFECT: improving object test reliability, as well as reducing labour input for use of a coordinate device.

5 dwg

FIELD: construction.

SUBSTANCE: linear guide with a sliding carriage is installed on a framework. Laser range profilometers with the possibility of moving them to change the position by the conveyor are mounted on the carriage. Laser scanners fixed on a bracket with one laser emitter and two receivers of the reflected signal, which are installed in the laser scanners, are used as the laser range profilometers. The receivers read the reflected signal simultaneously of the same cross-section of a reinforced concrete cross-tie. Minimum two laser scanners for simultaneous measurement of two or more reinforced concrete cross-ties are fixed on the carriage.

EFFECT: simplification of the system and measuring process and an improved performance and efficiency of the system operation due to the provision of a possibility to measure the parameters of two or more cross-ties at the same time.

2 dwg

FIELD: physics.

SUBSTANCE: method comprises inspecting a portion of a railway line using a magnetic flaw detector mounted on a flaw detector car; identifying defects and structural components (bolt and welded joints of rails, metal rail plates etc), signals from which and positions of which are stored in a test card; using data on the structural components of the railway line for navigation during ultrasonic flaw detection of the same portion of the railway line; detailed analysis of objects identified by the magnetic flaw detector using an ultrasonic flaw detector; correcting the test card based on the flaw detection results.

EFFECT: high accuracy, quality and rate of detecting defects on rails.

2 cl, 5 dwg

FIELD: measurement equipment.

SUBSTANCE: device is used to monitor the deviation from straightness at the surface of the side active face of a rail head in horizontal plane and at the rail head running surface in vertical plane by contactless method. The device for automatic monitoring of rails' welded joint straightness comprises a casing, a mechanical portion, end face panels, contactless location sensors, sensors for contactless measurement of distance to the rail surface and an electronic unit. The mechanical portion consists of locating prisms closed by the end face panels on the outer side, the panels are fitted by cutouts corresponding to the surfaces mating the surfaces to be monitored with built-in magnets being installed between them. Each prism is equipped by backing-up tips contacting with the monitored surfaces. The contactless location sensors interfaced with the electronic unit are set near the tips. In the central casing part between the auxiliary prisms there installed are the sensors for contactless measurement of distance to the rail surface which are interfaced with the electronic unit providing for the display of the nonstraightness at analogue indicators and at a graphic display unit and for the storage of nonstraightness results in a memory block. The invention is also related to the method of using the device.

EFFECT: possibility of getting visualised and reliable information, reduction of time required for monitoring of rails' welded joint straightness.

2 cl, 10 dwg

FIELD: transport.

SUBSTANCE: railway testing system contains track measuring truck and network centre and reference stations connected with the system. The truck contains control-computing complex to which track geometrical parameters measurement tools, navigational signals receiver, display unit, memory unit, transmit-receive unit, processor, communication interface unit, local alarm messaging unit and acoustical-electrical transducers are connected. Each reference station includes transceiver for navigational signals. Network centre consist of communication server, processing and control unit and data archiving unit. Also, external track gang notification system is included in the system.

EFFECT: improved safety of track gangs and mobile testing facilities.

2 cl, 1 dwg

FIELD: transport.

SUBSTANCE: diagnostics car incorporated with the train and equipped with strain-gage mounted axles, strain-gage auto couplings, meters, systems of satellite navigation and wireless communication are used to define the track geometry conditions. Cure radii, positions of rail threads in plan and profile, track gage and other parameters related to electronic GPS map to relate them to the data of last trips of track metering train. At a time, strain-gage mounted axles are used to define vertical and lateral forces, their relationship in interaction between track and rolling stock and between rail and wheel. Strain-gage auto couplings are used to define dynamic forces at rolling stock to estimate dangerous section of the track for empty cars to be related to track profile. Proceeding from track geometry parameter measurements and train speed, probability of train derailing is estimated caused by rolling of wheel flange on the rail. Track sections are defined which can have anti-derailing factors lower than standard ones to work out recommendations on current maintenance of said tracks.

EFFECT: higher validity and efficiency of estimation.

2 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention relates to control over the state of track, particularly, to control over displacement of welded railway rail skeleton section displacement. Proposed method consists in defining the position of markers on rail skeleton relative to fixed objects (reference sleepers). Welded butts are used as said markers. Relative arrangement of selected welded butt with respect to selected reference sleeper is defined by the data of flaw detector car magnetic control channel so that signals from, say, bird pad and welded but can be unambiguously identified on defectogram. Besides their relative spatial position can be unambiguously identified by the data received from track transducer (coordinate meter) of flaw detector car. Magnitude of displacement is defined by comparing current data with that obtained before.

EFFECT: instrumental control over displacement.

1 dwg

FIELD: railway transport; measuring facilities.

SUBSTANCE: invention relates to special purpose devices for measuring separate geometric parameters of reinforced concrete ties, i.e. propelling and canting of rail flats on reinforced concrete ties. Proposed device contains housing 1 with fitted-on transport handle 2, right-hand support 3 and left-hand support 4. First support screw 5 and second support screw 6 are installed on right-hand support 3, third support screw 7 and fourth support screw 8 are installed on left-hand support 4, right-hand catcher 9 and left-hand catcher 10 are installed on ends of housing 1, sensor 11 is secured on first support screw 5. Housing 1 carries also right-hand orientation handle 13 with pushbutton 15 and left-hand orientation handle 14. Base 16 is fastened in central part of housing 1, controller 17 and supply compartment 18 being secured on base 16. Device for measuring rail flat canting contains housing 1 with fitted-on transport handle 2, right-hand support 3 and left-hand support 4. First support screw 5 and second support screw 6 are installed on right-hand support 3. And third support screw 7 and fourth support screw 8 are installed on left0hand support 4. Right-hand catcher 9 and left-hand catcher 10 are installed on ends of housing 1, first sensor 11 is secured on first support screw 5, and second sensor 19 is installed on fourth support screw 8. Housing 1 carries right-hand orientation handle 13 with pushbutton 15, and left-hand orientation handle 14. Base 16 with fitted-on controller 17 and supply compartment 18 is secured in central part of housing 1. Moreover, support 21 is connected to housing 1 through vertical rods in central part.

EFFECT: improved efficiency of measurements, increased accuracy and provision of operative measurement of parameters under checking.

3 cl, 2 dwg

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