Method of complex rail diagnostics

FIELD: railroad facilities.

SUBSTANCE: method of complex rail diagnostics relates to control and measuring devices for checking the condition of railway tracks and can be used for testing a railway track by a complex of non-destructive testing tools, including for detection of microcracks on the rail head running surface. Method comprises installing, in known relative positions, devices for: defectoscopy, measurement of unevenness and video surveillance of rails, moving the vehicle along the railway tracks, constant measuring the condition of the railway tracks by all devices and preserving the results obtained. When detecting sections of railway tracks with surface defects or irregularities, images of these sections of the railway track are fixed with illumination at different angles, most contrasting with respect to defects video frames are identified and the are used in a joint analysis to assess the degree of development of microcracks and other surface defects.

EFFECT: as a result, the reliability of detecting microcracks on the rail head surface increases significantly while reducing the amount of recorded information.

1 cl, 2 dwg

 



 

Same patents:

FIELD: measuring equipment.

SUBSTANCE: use: for an acoustic flaw detection of malfunctions of a rail track. Substance: consists in the fact that an acoustic signal is transmitted into rails, the reflected signal is accepted, and by time of distribution of acoustic signals to a place of malfunction and back they determine its coordinate, the reflected signal is accepted by piezoelectric converters installed on sliding bearings, located on a shaft of a wheel set, transfer and reception of acoustic signals is carried out alternately, thus as a power source of acoustic signals they use strikes of wheel sets on joints of the rail way, they stabilise impulses by the constant weight of the locomotive a working range of its speeds at a rolling angle α=0.001÷0.002°, they register at the same time frequency of following of the created shock impulses, background intensity and a frequency range of acoustic noise in an interval between the first and the second shock impulses and the reflected signals from at least 2 wheel sets, transforming the created shock impulses to squared impulses, define their duration between time periods of the back front and the forward front, decomposing rectangular impulses from the right and left track in a Fourier row and allocate the main harmonic of the right and left track, then they carry out further processing of the received data, defining malfunctions of a rail track.

EFFECT: possibility of detection of difficult defects in a rail track.

4 dwg

FIELD: instrument making.

SUBSTANCE: invention is related to methods of nondestructive check. In ultrasonic method of cracks detection in walls of bolt openings of railway rails, which are non-testable from rolling surface, according to the first version, in controlled rail with the help of direct transmit-receive piezoelectric converter located near opening so that electroacoustic screen lies on conventional line passing through centre of opening, perpendicularly to surface of rail web, pulse ultrasonic radiations are emitted, echo-signals reflected from opposite surface of web are received, converter is displaced along surface of rail web around opening, crack is detected based on disappearance or reduction of echo-signal. According to the second version, two inclined piezoelectric converters are used, which operate in separate mode of transmit-receive, located near opening so that acoustic axes of converters pass along tangent to opening walls and are directed towards each other so that signal reflected from opposite surface of web, arrives to receiver, ultrasonic vibrations are emitted, echo-signals reflected from web surface are received, converters are displaced along surface of rail web around hole, crack is detected based on disappearance or reduction of echo-signal.

EFFECT: improved safety of traffic, higher credibility of cracks detection in walls of bolt openings.

2 cl, 3 dwg

FIELD: railway transport.

SUBSTANCE: device comprises base that can move over the surface of the rail, unit of electroacoustic converters with pressing mechanism for permitting rising and lowering, mechanism for clamping the head of the rail pivotally connected with the base, two additional units of electroacoustic converters with pressing mechanisms, and units of electroacoustic converters connected with the mechanism of clamping the head of the rail.

EFFECT: enhanced efficiency and reliability.

4 dwg

FIELD: railway transport.

SUBSTANCE: invention relates to method of diagnosing condition of railway and street car tracks. Proposed device contains detectors designed for measuring deviation of gauge and position of track by level of sags, humps and cavities connected with contact members. Device contains also vertical parallel, inner and outer posts, rollers made for interaction with side working inner surfaces of side track, rollers made for interaction with upper working surfaces of rail track, jambs some ends of which are connected with roller races and others, with corresponding posts. One of detectors is made in form of dial indicator, being arranged on one of inner posts and coupled with roller-type contact elements made for interaction with side working inner surfaces of track. Rod of said indicator is in contact with upper end of other inner post. Springs are placed between inner post. Springs are placed between inner posts in upper and lower parts, mounted on upper surface of two pairs of bosses fitted on one axle. Holes are made in inner posts. Axle with bushing is placed in inner posts. Bracket is connected by one end to bushing, and other end of bracket serves for fastening to floor of test car. Second detector is made in form of metric rule secured to inner post, and two pointers secured on upper end faces of outer posts. Two pairs of slots are made on outer posts. Slots are arranged on one axis and they accommodate pins installed for movement. Pins are provided with stops from outer and inner parts of posts.

EFFECT: improved reliability of device, reduced cost, possibility of reading results of measuring directly from detectors.

2 dwg

The invention relates to non-destructive testing of materials and can be used for ultrasonic testing of rails and other long items

The invention relates to non-destructive testing of materials and can be used for ultrasonic testing of rails and other long items

The invention relates to railway transport, in particular to the control and recording devices to determine the status of the rolling stock and track, and is intended for use in scientific studies of processes of interaction of way and rolling stock, as well as estimates of expected flange wear of tyres wheelsets and rails in curves

The invention relates to railway car, in particular to systems for measurement, control and diagnostics, and can be used in devices for contactless control of geometrical parameters of the superstructure and undercarriage parts rolling stock

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

FIELD: railway transport.

SUBSTANCE: invention relates to method of diagnosing condition of railway and street car tracks. Proposed device contains detectors designed for measuring deviation of gauge and position of track by level of sags, humps and cavities connected with contact members. Device contains also vertical parallel, inner and outer posts, rollers made for interaction with side working inner surfaces of side track, rollers made for interaction with upper working surfaces of rail track, jambs some ends of which are connected with roller races and others, with corresponding posts. One of detectors is made in form of dial indicator, being arranged on one of inner posts and coupled with roller-type contact elements made for interaction with side working inner surfaces of track. Rod of said indicator is in contact with upper end of other inner post. Springs are placed between inner post. Springs are placed between inner posts in upper and lower parts, mounted on upper surface of two pairs of bosses fitted on one axle. Holes are made in inner posts. Axle with bushing is placed in inner posts. Bracket is connected by one end to bushing, and other end of bracket serves for fastening to floor of test car. Second detector is made in form of metric rule secured to inner post, and two pointers secured on upper end faces of outer posts. Two pairs of slots are made on outer posts. Slots are arranged on one axis and they accommodate pins installed for movement. Pins are provided with stops from outer and inner parts of posts.

EFFECT: improved reliability of device, reduced cost, possibility of reading results of measuring directly from detectors.

2 dwg

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