Abstract:
PROBLEM TO BE SOLVED: To provide an ultrasonic inspection method that can precisely and efficiently detect a defect etc., even in a place and a region where it is difficult to perform ultrasonic inspection, and to provide an ultrasonic inspection device.SOLUTION: An ultrasonic wave is transmitted from a phased array probe 2 to an inspection object part 101 to be inspected, and a reflected wave of the ultrasonic wave reflected on an inspection object part 101 is received to detect a defect of the inspection object part 101 with a signal of the received ultrasonic wave. The phased array probe 2 is arranged on one side with respect to a weld line L of a weld zone 101, and moved on a body 100 to be inspected along the weld line L. A plurality of ultrasonic waves which converge on an arbitrary point in a direction substantially orthogonal to the moving direction of the phased array probe 2 for each of a plurality of scanning positions are transmitted while made different in refraction angles. A sectional image including the direction substantially orthogonal to the moving direction and a plate thickness direction of the body to be inspected as axes is generated from signals of received reflected wave for each of the plurality of scanning positions. The defect is detected from the generated sectional images.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for inspecting a rail bottom face at a concealed part of a railway rail, which has higher resolution of a flaw than ever before and can detect a position of the flaw in a longitudinal direction of the rail and in a cross direction with respect to the longitudinal direction, and an inspection head used for the method.SOLUTION: An ultrasonic probe for a surface wave 13 is brought into contact with a rail bottom face 2a at an exposed part of a rail 2. The surface wave is made enter the rail bottom face 2a and is transmitted toward a concealed part 3, and the reflected surface wave is received by the probe 13. The probe 13 is oscillated or is moved in a crossing direction with respect to a longitudinal direction of the rail during the contacting state of the probe 13, so that a flaw at the concealed part 3 is inspected.
Abstract:
PROBLEM TO BE SOLVED: To provide an inspection device for allowing a truck to stably run on the curved surface of piping, or the like, while being a simple structure that enables inspection, and to provide an inspection method which uses the device.SOLUTION: The inspection device is equipped with the truck which is equipped with a probe and a rail 4 for allowing the truck to run on an object to be inspected and allows the truck to run to inspect the object to be inspected. The object to be inspected has a curved surface 100a that is at least partially curved. The truck is equipped with its truck body, having a motor and a pair of the driving wheels 22 and 22 driven by the motor and a probe support part for supporting the probe. The rail 4 is equipped with a plurality of rail blocks 40, each of which is constituted by connecting a pair of short rails 41 and 41 by an intermediate connection part 43, and the rail blocks 40 are connected in a bendable manner. At the running of the truck, at least one of a pair of the driving wheels 22 and 22 comes into contact with the curved surface 100a via the piercing grooves of a pair of the short rails 41 and 41.
Abstract:
PROBLEM TO BE SOLVED: To provide a pipe thickness measuring device capable of efficiently measuring the thickness of piping having a bent part and an extended/contracted part in the middle. SOLUTION: The pipe thickness measuring device 10 for measuring the thickness of the piping 16 having the bent part 14 and the extended/contracted part 15 includes: a pipe thickness measuring means 18 which moves in the piping 16, and has on the tip side an ultrasonic probe 17 provided rotatably facing the radial outside for measuring the thickness of the piping 16; a flexible tube 19 connected to the base of the pipe thickness measuring means 18; a torque transmitting member 22 which is arranged rotatably in the flexible tube 19, whose tip is connected to the ultrasonic probe 17 through a core metal pipe 20, and in which a cord 21 from the ultrasonic probe 17 is arranged; a tube transfer means 23 for transferring the flexible tube 19 into or out of the piping 16; a rotating means 24 for rotating/driving the torque transmitting member 22; and a slip ring mechanism 25 which is arranged on the base of the torque transmitting member 22 and is connected to the cord 21 to be rotated/driven. COPYRIGHT: (C)2011,JPO&INPIT