A rolling search unit for ultrasonic inspection of railroad rails employs a wheel assembly including a fluid-filled tire that rolls along a rail with ultrasonic transducers that propagate ultrasonic beams through the fluid and tire into an underlying rail during an inspection operation. The beams reflected from defects in the rail return to the transducers and are detected and analyzed for subsequent care. The wheel assembly also includes an anti-rotation baffle to reduce rotation of the fluid with the tire and a pressure regulator for controlling the pressure of the fluid within the tire at various speeds.

There is provided detection instrumentation for the detection of transverse rail defects in rail head hitherto considered untestable on account of acoustic signal attenuation problems of horizontal lamination defects. The detection instrumentation comprises a pulse-echo acoustic transducer having a wear face for contacting a fillet of the rail and being aimed towards a head of the rail such that the transmitter transmits acoustic signals into the head and the receiver receives acoustic signals reflected at differing depths within the head. A signal receiver operably coupled to the receiver times the acoustic signals according to a timeseries railhead depth position scale. Analysis of the depth positions of the reflected acoustic signals according to relative positioning of the instrumentation along the rail may identify the transverse rail defects.

Provided is a rail inspection system capable of accurately detecting a defect of a railroad rail. The system includes: a sensor part group that has a plurality of sensor parts having receiver coils, and first oscillator coils and second oscillator coils corresponding to the receiver coils being arranged in a line parallel in a width direction of a railroad rail to be inspected; an oscillation part that supplies an oscillation signal to each of the first oscillator coils and the second oscillator coils; and a detection part group that has a plurality of detection parts to detect, with respect to an output signal from each of the receiver coils when the sensor part group moves in a laying direction of the railroad rail, a first inspection signal corresponding to a first phase of the output signal and a second inspection signal corresponding to a second phase of the output signal.

An adaptive inspection carriage for inspecting the rails of a railroad by one or more detectors supported by the carriage. The carriage includes a frame having a generally rectangular configuration with oppositely disposed side members and transverse members. The side members may be in an operative position extending parallel to a respective rail to be inspected. The transverse members may be in an operative position extending in a direction transverse to the rails. Each transverse member may be connected at one end with a side member by means of a swivel coupling having one swivel axis perpendicular to the plane of the generally rectangular frame and another swivel axis parallel to the side member, and connected at the other end to another side member by a swivel coupling having one swivel axis perpendicular to the plane of the rectangular frame and no swivel axis parallel to the second side member.

An infrastructure detection and monitoring system includes a remote data storage system that receives and communicates sensor data and signals regarding infrastructure health. The remote data storage system processes and/or stores at least a first sensor data portion and generates advisory signals based on the first sensor data portion. The advisory signals are communicated to a receiver device responsive to the sensor data indicating that the health of the infrastructure indicates imminent failure. Additionally or alternatively, the receiver device can generate one or more control signals responsive to the advisory signals or responsive to the sensor data indicating that the heath of the infrastructure indicates imminent failure of the infrastructure.

A method of evaluating railway ties for deterioration is mounted on a moving vehicle along the rails where the presence of the tie is detected and an impact energy source is used to create at least one wave in a surface of the tie which travels longitudinally along the tie. At positions spaced longitudinally from the source, the time of arrival of the wave is detected typically by a series of sensors responsive to air pressure changes to determine a speed of propagation of the wave in the tie and, in the event that the speed in said tie is below a predetermined speed, an output indication is provided regarding the deterioration of the tie, which can include a real time marking of the tie detected.

A system and method for inspecting a rail is provided. The system includes an ultrasonic transducer positioned to emit an ultrasonic beam onto the rail and receive a refraction beam, the ultrasonic transducer being movable between a first position and a second position. A sensor is operable to measure an angle of a carriage, the carriage being positioned on the rail. A controller is operably coupled to the sensor, the controller having a processor that is responsive to executable computer instructions when executed on the processor to cause the ultrasonic transducer to move to receive refraction beam in response to the measured angle indicating a rail radius of less than a predetermined first threshold.

Described are a transducer made of at least three transducer elements which approximate a sector of an elementary wave with a virtual point source, and a transducer arrangement with three transducers made of at least three transducer elements, wherein the transducers, in the cross section, are disposed along the shorter base and the two non-parallel legs of a virtual trapezoid. Moreover, the invention relates to an ultrasonic probe system comprising the transducer arrangement according to the invention and an inspection method using a transducer made of at least three transducer elements, with the number of transducer elements experiencing a virtual increase.

A system for performing ultrasonic inspection of a rail including a sensing wheel arranged to roll along the top of the rail, and a plurality of ultrasonic transducers in the sensing wheel. The sensing wheel is aligned perpendicular to a vertical plane extending from the rail, detecting horizontal defects in a head area of the rail. The ultrasonic rail inspection system is designed to detect and classify horizontal defects in the head of the rail which will propagate in the longitudinal direction that will eventually result in defects component that will propagate in the transverse plane of the rail head area. The capability of detecting and classification of this type of defect will enable compliance to the FRA subpart 213.113 Defective rails specification, that is currently not being met by the existing technology.

A railway track defect detection system may include a mobile defect detection platform and a modal parameter analyzer. The platform may include an excitation mechanism (e.g., an excitation hammer or wheels that are in contact with a railway track) to apply multiple impact forces to the railway track while the platform travels along the railway track, and a laser Doppler vibrometer to capture, while the platform travels along the railway track, vibration data representing vibrations of the railway track caused by application of the multiple impact forces by the excitation mechanism. The modal parameter analyzer may be configured to detect, based on the vibration data captured by the laser Doppler vibrometer, a defect in the railway track. For example, changes in vibration amplitudes, mode shapes, damping ratios, or a natural frequency derived from the received vibration data may indicate the presence of a defect in the railway track.