Method of centering following-stabilizing device of high-speed flaw detector and device for its implementation

FIELD: physics.

SUBSTANCE: during the movement of the following-stabilizing device, an alternating transverse magnetic field is created by pairwise placed permanent magnets with oppositely directed poles, the alternating magnetic field of which, when moving along the rail and crossing the transverse magnetic field of the rail, excites the eddy currents that create magnetic fields directed towards each other, and the resultant magnetic field, which does not depend on the movement speed. At least, two permanent magnets with parallel longitudinal magnetic axes and poles facing in opposite directions are fixed on each of the parallelogram pendulum suspension pendants of longitudinal rocking.

EFFECT: increasing the accuracy of measurements of the mobile flaw detector at high speeds of its movement.

2 cl, 4 dwg

 



 

Same patents:

FIELD: measurement equipment.

SUBSTANCE: device comprises at least two three-component sensors of induction of magnetic field, arranged on different levels by height relative to the pipeline, the first and second amplifiers, an analogue-digital converter (ADC), a device to determine difference of values of magnetic field induction by axes X, Y, Z, a controller, a memory unit and an information display device. Additionally the device comprises a unit of value detection and direction of full vector of magnetic field induction, measured by the first three-component sensor, a unit to detect value and direction of full vector of magnetic field induction measured by the second three-component sensor, and a unit of detection of difference and angle between full vectors of induction of the magnetic field, measured by the first and second three-component sensors.

EFFECT: possibility to establish full and true picture of magnetic field fluctuation, including their value and shape.

2 dwg

FIELD: measurement equipment.

SUBSTANCE: extended structures during their operation, which are made from homogeneous ferromagnetic material and have the profile section of a symmetrical shape, are magnetised so that poles of symmetric magnetic field are formed on the symmetry axis of the profile section throughout the length of an observation object. Assessment of available defects or mechanical stresses in zones of the profile section of the structure is performed as per the change of values of electrical voltages continuously taken from inductive sensors installed in one and the same plane in pairwise symmetrical points of the section at its boundaries at movement of these sensors along the length of the structure profile.

EFFECT: possibility of on-line detection of defects and assessment of local stresses in material of extended structures by means of automated mobile hardware.

1 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: instrumentation.

SUBSTANCE: proposed device consists in measurement of gradients of permanent magnetic field components actual in time at several levels with the help of at least three strips of magnetic resistors displaced by operator along pipeline axis. Two strips of magnetic resistors are arranged vertically and one strip is fitted horizontally. Every strip is composed of three three-component transducers. Gradients (∂Xi/∂y, ∂Yi/∂y, ∂Zi/∂y) are computed proceeding from recorded data for every component of the transducer for time interval defined by hardware performances, that is, at the rate of 6256 measurements a second. Said gradients are defined as the difference (Xi+1-Xi)/Δy, (Yi+1-Yi)/ Δy, (Zi+1-Zi)/ Δy at Δy→0. Application of gradients obtained in small time interval allows getting rid of errors related with unstable operation of transducers, change in their sensitivity, increase in scatter of transducer parameters and their dependence upon temperature.

EFFECT: fast response, accurate detection of buried pipeline defects, better operating performances.

4 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: in an industrial detector for conveyor lines the area of receiving coils is many times less than the area of a metal detector "window". Signals from receiving coils arrive to inlet amplifiers (separate for each coil), from the outlet of the amplifier the signal is sent to a summator, where it is summed with the "compensation" signal, arriving from a digital to analog converter (DAC), which makes it possible to compensate the signal x.x., then the signal arrives to an analog to digital converter (ADC). Data from all ADC, a speed sensor and another receiving coil connected in parallel to the transmitting one, and also data from the scales (optionally) is sent to a unit of a central processor, in which metal presence is detected. Also in parallel to the transmitting coil there is a calibration loop connected, which is periodically closed, making it possible for an instrument to independently perform automatic inspection and automatic calibration. In the considered metal detector the excitation coil connected to an AC generator creates unresolved magnetic field of excitation acting as the investigated object, moving through the control zone.

EFFECT: increased sensitivity of a metal detector and reduced impact of external electromagnetic environment, which causes reduction of quantity of false actuations.

1 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to non-contact diagnostics of metal tubes during operation. The inventive method comprises determining the location and depth of the pipeline at the test site, installation along the pipeline of at least two identical sensors for measuring tension (tangential component) of the magnetic field, synchronous recording of changes in the magnetic field caused by stray currents, comparative information processing from all sensors and diagnostic conclusion. The apparatus comprises at least two identical sensors for installation along a pipeline axis, determining the magnetic field, means for linkage at the location, means for determining the depth of the pipeline, a facility of synchronisation of switching and sensor means for recording the magnetic field change caused by stray currents and data processing.

EFFECT: simplification of searching for locations of pipeline corrosion, improving accuracy of fault location.

13 cl, 8 dwg

FIELD: instrumentation.

SUBSTANCE: proposed instrument comprises interconnected power supply 1, locating and control unit 2 and set of magnetic pickups 3. Said set of magnetic pickups is composed of permanent magnets arranged radially in their crown to interact by their magnetic field with Hall transducer 302. Said instrument is displaced inside the pipeline, over its entire length, to control pipeline thickness and to detect whatever holes so that distance whereat detected holes are located starting from initial point is determined as well as their position in pipeline circumference. All measurements are a part of online process executed in instrument displacement inside said pipeline.

EFFECT: info can be loaded in computer to be available for use and decision making relative to pipeline integrity.

2 tbl, 37 cl, 10 dwg

FIELD: machine building.

SUBSTANCE: in a diagnostics method at least 18 single-component sensors of a constant magnetic field are used as sensors of the field; compensation of action on measurement results of fluctuation of constant magnetic field of the Earth is performed. Mathematical processing of measurements is performed based on sum and difference of signals of coaxial components of the field. As mathematical processing, tensorial processing of a matrix of gradients is used; the above matrix is composed based on measurement results so that linear, quadratic and cubic invariants are obtained and components of magnetic moments of defect anomalies obtained on the basis of a solution of an equation system are calculated. At processing of measurements there excluded from processing are intervals of measurement recording, which exceed the load action time determined as to exceedance of amplitudes of threshold values of measured signals.

EFFECT: improving accuracy of determination of a pipeline run trajectory, detection, geometrisation and ranging of defects of metal and insulation.

6 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: essence of the invention consists in use of a new navigation system including a sensor unit that consists of two groups. Each group includes three single-component sensors; besides, similar axes of sensors are parallel while axes of sensors of each of the groups are orthogonal; besides, axes of two sensors in each of the groups are parallel to each other and to direction of movement and located in horizontal plane. Measurement of components of a variable magnetic field is performed continuously; angles of rotation and inclination of the sensor unit, as well as a value of offset of the sensor unit from a projection of pipeline axis are calculated based on measured components. Commands to the operator are supplied in the form of voice instructions using the language with which the operator is familiar based on comparison of signals corresponding to angles of rotation and inclination, as well as values of offsets as per the pre-determined threshold values of those signals. Information on technical state of the pipeline is received based on ratios of orthogonal components measured along horizontal and vertical axes of each of the groups.

EFFECT: improving accuracy of a routing method; reducing power consumption of the device and increasing labour intensity of the operator at use of the proposed method and device.

4 cl, 3 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: 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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