Patent ID: 7389694
Filing Date: 2008-06-24
Classification: G01N

Abstract:
1. A portable direct rail inspection system for allowing a user to bidirectionally evaluate and detect flaws in railroad tracks comprising, in combination: a vehicle having an undercarriage with a guide wheel and being adapted to ride along a rail of a railroad track; an apparatus coupled by an apparatus mount to the guide wheel of the undercarriage, the apparatus mount having a mounting pin aperture there through; a downwardly displaced arm having an upper end and a lower end, the upper end having a centrally located mounting pin aperture there through and the lower end having a wheel axle hole there through; a mounting pin fabricated of rigid material and pivotably coupling the downwardly displaced arm and the apparatus mount; a first wheel and a second wheel, each wheel having an inner side and an outer side and a thickness there between, the inner side of the first wheel having a flange of a first diameter to secure the apparatus on the rail and the outer side having a round track contact surface of a second diameter; a first axle fabricated of rigid material to couple the first wheel to the downwardly displaced arm and a sensor mounting bracket, the sensor mounting bracket having an inner side and an outer side and a thickness there between, and a forward end and a rearward end with an extent there between, the sensor mounting bracket also having a first axle aperture on the forward end to allow coupling the sensor mounting bracket to the first axle, the sensor mounting bracket also having a second axle aperture on the rearward end to allow coupling of the sensor mounting bracket to a second axle fabricated of rigid material, the second axle adapted to couple the second wheel to the sensor mounting bracket; a transmitter adapted to transmit ultrasonic guided waves selected from the class of ultrasonic guided waves including Lamb waves, Rayleigh waves, Sezawa waves and Love waves, bidirectionally along the rail while the vehicle, apparatus, and transmitter are moving along the railroad track; a sensor adapted to detect flaws in response to the transmitted ultrasonic guided waves while the vehicle, apparatus, transmitter and sensor are moving along the railroad track; and an electronic coupler for operatively coupling the sensor to monitoring equipment.