Device for controlling the surface topography of the wear of the rail head
(57) Abstract:The invention relates to techniques for contactless control of the parameters of the head rail and can be used in a mobile measuring laboratory of rail transport in static condition and dynamics. The essence of the technical solution is that the matrix eddy-current Converter is implemented as a set of inductors, the centers of which are aligned at one point lying on the Central axis of the transducer. The device can improve the accuracy of control due to kvaziodnorodnoj local measure multiple points on the surface of the wear of the rail head. Point is approximated by the surface topography of wear, and it is measured width, depth and angle of wear at any point of this surface. 3 Il. The invention relates to contactless control parameters of the lateral wear of the rail head and can be used in a mobile measuring laboratory of rail transport as in statics and dynamics.Known devices for controlling the surface topography of the wear of the rail head, comprising a generator of high is clever rail, amplitude detectors, inputs connected to the outputs of the Converter, compensators, the inputs of which are connected to the outputs of the detectors, the signal processing unit Converter inputs connected to the outputs of the joints, and the memory block with the Registrar .These devices allow to measure only one point of the surface topography of the wear of the rail head in its transverse profile at level 13 mm from the surface of the rail and on the obtained measurement value is indirectly judged wear (wear parameters) head. In practice, the surface wear of the rail head cross-section is non-linear in nature, so for a more accurate result of wear, it is necessary to measure several points on the ground surface in the transverse cross section of the rail.The closest technical solution is a device comprising a high frequency generator, the switch matrix eddy current transducer and a computer to simulate the parameters of wear of the rail head .In the description of this device is disclosed Converter block diagram. However, the experiments conducted on this device showed a good agreement with experimental and the reader and its structure, thereby reducing development time measuring device and to reduce financial costs.The essence of the proposed technical solution is that the device containing the high-frequency generator, the switch matrix eddy current transducer, placed normal to the tread surface of the rail head, the amplitude detector inputs connected to the outputs of the Converter, compensators, the inputs of which are connected to the outputs of the detectors, the signal processing unit Converter inputs connected to the outputs of the joints, and the memory block with the Registrar, the Converter is implemented in the form of n inductors of the Converter, the centers of which are aligned at one point lying on the Central axis of the transducer perpendicular to the running surface of the rail head, the size in the direction of the cross section of the rail each subsequent of n inductors, starting from the inner performed exceeds the size of the previous coil, and the number of amplitude detector and compensator is chosen equal to the number n of coils.The technical result of the invention is the provision of safety rail is aparecem profile. Reliability is improved due to kvaziodnorodnoj local dimension "n" points of surface wear on the head of the cross-section of the rail, by approximating the elevation of the curve surface wear, and it is measured width, depth and angle of wear at any point of this surface.In Fig. 1 shows the structural diagram of the device of Fig. 2 shows the layout of the transducer head over the rail on the installation height h0Fig. 3 - structure of the matrix Converter in the plan.The device comprises (Fig. 1) generator 1 high frequency, the switch 2, the matrix eddy current Converter 3, consisting of inductors 4, 5,...,n, the amplitude detectors 6, 7,...,n, the joints 8, 9,...,n, the processing circuit 10 of the information signals of the Converter 3, a memory unit 11 and the recorder 12. The generator 1 is connected through a switch 2 to the coils 4, 5,...,n eddy probe 3, the outputs of which are connected with the inputs of the amplitude detectors 6,7,..,n, and the outputs of the detectors are connected with the inputs of the joints 8, 9,...,n. The outputs of the joints 8, 9,...,n are connected to the inputs of the circuit 10, signal processing, and then the information signals into the memory unit 11 and fixed on R 3 is fixed in the switch 2, which connects the coil alternately to the generator 1. The switch 2 is controlled by a reference voltage from a clock generator (Fig. 1-3 not shown). The switching frequency is selected from the conditions of the adequacy of time survey information from each of the coils on the one hand and performance of the survey on the other side, but both depend on the dynamics of the process (speed train).The Converter 3 is designed to convert the measured parameter into an electrical signal. Structurally, the Converter 3 consists of n overhead coils, placed normal to the tread surface of the rail head. The centers of the winding coils of n combined at one point lying on the Central axis Z-Z of the inverter 3, perpendicular to the surface of the rail. The size of each of n successive coils in the direction of the X-X plane of the cross-section of the rail head, starting from the inner smaller coil transducer 3, is made exceeds the size of the previous coil. The size of the coils in the direction Y-Y of the longitudinal axis of the rail may be different, although to simplify the technology of winding coils and processing of measurement results information of each of the coils n this size size has a different sensitivity to the measured distance to the point, located on the surface of the rail head in the direction of the vertical axis Z-Z, and therefore allows to determine the exact gap to the point of surface wear in the transverse cross section of the rail.The joints 8, 9,...,n stresses designed to compensate for the level of initial voltages U0i(i=n is the number of coils, expansion joints), corresponding to the voltages on the coils when h0= 10 and in the absence of wear of the rail head. Compensators are blocks collected on operational amplifiers, the input of which is transmitted through the amplitude detectors modulated measured parameters voltage coils 4, 5,. . . ,n, and the second input serves the reference voltages U0from a clock generator (Fig. 1-3 not shown) whose value is set by the value corresponding to the voltages on the coils when h0= 10 mm and no wear. To ensure on the one hand smoothing the pulses caused by the switching, and on the other, the bandwidth of the useful signal with minimal distortion at the output of the compensator is turned on, or the capacity of a certain value, or in the feedback circuit of operational amplifiers included filters.Schemes is the quiet then fed into the unit 11 storing information, and in the requirements of visual inspection is to recorder 12. As the Registrar may be used a visual device monitor type.The technical result of the invention can be ensuring the safety of rail transport by improving the information content about the technical condition of the rail of the railroad tracks.The operation of the device. Converter 3 have normal over the rail. With generator 1 is supplied through the switch 2, which provides a discrete excitation coils of the Converter 3, a high-frequency voltage. When the flow through the inductor of the Converter 3 high frequency currents around each of them creates an electromagnetic field which induces a conductive material controlled rail head eddy currents, causing the rail to the primary electromotive force in the coils - secondary electromotive force. The magnitude of the interaction of primary and secondary electromotive forces is a measure of the measured parameter. Since each of the coils of the transducer 3 has a different size in cross section X-X, the measurement range of the distance to a certain point of the rail head (gap between p the coil. More than n coils, the more it is possible to measure the surface points of wear.The technical result of the invention is to improve the safety of rail traffic.Sources of information
1. The device for technical diagnostics of railway track. RF patent N 2066646.2. Diagnostics of the surface topography of the lateral wear of the rail head. In kN. : Non-destructive testing and diagnostics. So 1. Abstracts by 15 Russian NTC. M., 1999, S. 215. Device for controlling the surface topography of the wear of the rail head, comprising a generator of high frequency, the switch matrix eddy current transducer, normally placed above the rail head, the amplitude detector inputs connected to the outputs of the Converter, compensators, the inputs of which are connected to the outputs of the detectors, the signal processing unit Converter inputs connected to the outputs of expansion joints, the memory block and the Registrar, characterized in that the Converter is implemented in the form of n inductors, the centers of which are aligned and lie on the Central axis of the transducer perpendicular to the running surface of the rail head, the size of each subsequent n catalyse size of the previous coil, and the number of amplitude detector and compensator are selected respectively equal to the number n of coils.
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.
FIELD: railway transport; permanent way.
SUBSTANCE: invention relates to method of noncontact inspection of profile of ballast base passing square to longitudinal direction of track. Inspection is carried out together with recording of deviation of track in level and in position. Depending on recorded defects as to level (a) and profile of ballast base 13 obtained for said level, amount of crushed stone for lifting track 4 to preset level and uniform ballasting is determined. To find amount of crushed stone required for ballast base 12, recorded profile of ballast base 13 is applied to preset profile of cross section 14.
EFFECT: improved ballasting of track.
3 cl, 4 dwg
FIELD: railway transport; permanent way.
SUBSTANCE: invention relates to method of grading of existing bed of railway in which cables and/or pipes are laid beyond the limits of rails, and to laser measuring device to read bed profile. According to proposed method, operator removes material of bed by sucking through definite steps along bed to form pits or cross trenches at each side of track, and using laser camera, checks profile near pit and position of buried cables or pipes and stores obtained information. Then, using information kept in memory, operator controls device for mechanical digging of material from both sides of track without risk of damage to buried cables or pipes and profile of graded bed. Laser measuring device is mounted on railway motor car with cross guide beam 12 and carriage with laser camera which can be moved along guide beam. Laser camera is pointed with its lens downwards to read distance from ground, being connected with computer to record position of bogie on rails and distance from camera to ground.
EFFECT: provision of safe, quick and cheap method of railway bed grading with use of laser measuring device.
6 cl, 6 dwg
FIELD: railway transport; permanent way testing facilities.
SUBSTANCE: method of pulling contact system cable comes to the following: each rail 6 is read off by means of distance pickup 16 placed over rail and moved continuously in longitudinal direction of track and scanning in plane 20 passing square to longitudinal direction of track. Problem points of measurement 25 on rail defining geometry of switch are recorded as measurement values in polar system of coordinates. Polar coordinates for measurement values are converted into Cartesian coordinates and information is recorded in memory at continuous measurements of distance by means of measuring wheel after which lateral section for switch 1 is calculated basing on recorded measurement values. Actual measurement values are compared in definite points of measurement 25 with preset values of at least two of enumerated parameters kept in memory, namely, width of clearance between counter-rail and running rail, through clearance or state of tongue as to its wear, minimum width between edge of guide rail and side edge of running rail in curve, width of gauge and/or distance between counter-rails or guide surfaces and deviation of obtained values from preset values. In device for noncontact measurement of lateral section or rail-to-rail distance of track, each pickup 16 is arranged in area over corresponding rail 6 being essentially laser scanner 17 for reading problem points of measurement 25 defining geometry of switch which is made for reciprocation at angle of scanning (α).
EFFECT: provision of quick and accurate determination and evaluation of measurands of vital importance for switch.
4 cl, 6 dwg
FIELD: railway transport; track maintenance.
SUBSTANCE: geometry of track is measured by using high-accuracy measuring circuit with two mechanically coupled test trucks forming transport and mechanically coupled test trucks forming transport and mechanical part of measuring system and including covered distance meter and truck tilting level sensors relative to horizon and at least one radiating mark (optical radiation source) rigidly installed on first test truck in direction of movement and providing pressing of flange of wheel to inner head of base rail, and optical electronic receiving-and-analyzing system rigidly secured on second truck. Second truck is double axle, with flanges of corresponding wheelsets pressed to inner surface of head of base rail, thus forming measuring base identifying position of base rail in points of contact of corresponding wheelsets.
EFFECT: improved accuracy of measurement at simplification of process.
4 cl, 5 dwg
FIELD: railway transport; permanent way.
SUBSTANCE: proposed device for checking condition of switch tongue includes movable and fixed members in form of tongue includes movable and fixed members in form of tongue and ties with adjoining and second stock rails secured on ties and it contains one tongue position pickup relative to adjoining stock rail designed for shunting track circuits of automatic block system. Device is furnished with stop shoe secured on fixed member of track and designed for limiting displacement of tongue along adjoining stock rail. Tongue position pickup is made in form of stationary and movable contacts. Used as stationary contact is said stop shoe which is electrically connected with adjoining stock rail and is electrically insulated from second stock rail. Movable contact is electrically connected with second stock rail being electrically insulated from adjoining stock rail and installed for power interaction with tongue and forming electric connection with stationary contact.
EFFECT: improved safety of traffic, enlarged functional capabilities of device.
5 cl, 3 dwg
FIELD: railway transport.
SUBSTANCE: invention can be used for diagnosing condition of rails using combined ultrasonic and magnetic nondestructive testing devices of higher resolving power. Proposed rail track mobile testing device includes vehicle on frame of which flaw detector bogie is mounted with system for pneumatic and manual lifting of bogie I to traveling position. Tracking ski secured on frame of flaw detector bogie is provided with ultrasonic testing converters unit. Mobile device is provides also with pneumatic system for forced pressing of flaw detector bogie to rails made for adjusting force of pressing in vertical axis and with lateral stabilizing device consisting of roller carriage with flexible damping support. Series magnetizing coils of magnetic control device whose inductive sensor is installed after converters unit in rear part of tracing ski in direction of movement of flaw detector bogie, said coils being fitted on axles of wheel-steps of flaw detector bogie and connected to each other. Said magnetizing coils are installed on bearings and are arranged I protective hood secured on frame of flat detector bogie. Housing of converters unit, protective hood and frame of flaw detector bogie are made on nonmagnetic material. Wheels of flaw detector bogie are installed for independent rotation.
EFFECT: increased resolving power at diagnosing condition of rails, increased dynamic stability of device in movement along rails, reduced mass and dimensional characteristics.
2 cl, 1 dwg
FIELD: railway transport.
SUBSTANCE: method comes to measuring vertical and horizontal accelerations of meter body and those of left-hand and right-hand axle boxes of one of its wheelsets, determining values of measured accelerations and components of vertical accelerations of axle boxes for preset fixed running speed, and comparing obtained values with tolerable values and determining minimum value of maximum running speed of meter on particular section of rail track. Proposed device contains covered part transmitter, initial data packet shaper, accumulator, filter unit, operator's panel, acceleration meters, speed meter, board time system, scaling unit, path irregularities detector, wheel out-of-roundness detector, body vibration intensity detector, maximum speed meter and report date packet shaper. Group of inventions provides determination, with high accuracy and reliability, values of accelerations appearing in main members of meter-path system and obtaining complex characteristics of dynamic interaction of rail track and running train.
EFFECT: simple design of device, low cost.
3 cl, 2 dwg
FIELD: railway transport; permanent way.
SUBSTANCE: invention relates to methods of checking and forecasting condition of rail track. According to proposed method, running course of body of track-testing car is measured by means of inertia navigational system installed under pivot of test bogie, and running hunting angle of test bogie relative to body is measured by means of angular displacement transducer. Then, using axle box-rail transducers, distance from flanges of corresponding wheels of bogie to rail heads are measured. Basing on obtained information , running courses of rail lines are calculated as running course of body minus running hunting angle of test bogie relative to body minus running angle of parallel misalignment of flanges of wheelsets of test bogie and heads of rail lines. Then running values of horizontal irregularities of rail lines are found as product of bogie base by deflection of running course of rail lines from running averaged courses of rail lines on bogie base calculated from courses of rail lines. Running radii of curvature of rail lines are found by dividing bogie base by measured increment of course angles of rail lines on bogie base.
EFFECT: provision of chordless (single point) method of checking leveling of rail lines.