There is provided a method for evaluating the cleanliness of a steel material by an ultrasonic flaw detection method enabling rapid acquisition of highly reliable data. Ultrasonic flaw detection is performed to detect a flaw in at least one part in the range of 90% or more and 100% or less of a steel material (for example, round bar 2) at a radial position where the center of the steel material is set as 0% and the surface is set as 100%, and then the cleanliness is evaluated based on the dimension and the number of inclusions in the steel material obtained by the ultrasonic flaw detection.

A bearing test apparatus has a bearing cap coupled to an outer ring of a bearing to be tested (a test bearing), a driving rotary shaft coupled to an inner ring of the test bearing to rotate the inner ring, and a bearing torque meter for measuring a single torque of the test bearing, wherein an extension bar is formed at the bearing cap to protrude thereon, wherein the bearing torque meter includes a measurement rod configured to contact the extension bar and be fixed to support the extension bar in a direction opposite to a rotating direction of the driving rotary shaft, and a power sensor for measuring a force applied to the measurement rod, wherein the single torque of the test bearing is calculated based on a distance from the driving rotary shaft to the measurement rod and a force applied to the measurement rod.

Embodiments provide a couplant and an arrangement of a couplant, a transducer, and a construction component. The couplant is adapted to couple the transducer to the surface of the construction component. The couplant provides 36% to 40% mass portion of hard metal.

A method of characterizing an object that includes, at least locally, a plane of symmetry, the method including performing at least one observation of ultrasound transmitted through the object, each observation being performed on an axis perpendicular to the plane of symmetry, each observation resulting from an emission of ultrasound generated along a respective one of the axes and meeting the object along the axis at an angle of incidence other than normal, the ultrasound meeting the object to follow a path that is symmetrical relative to the plane of symmetry.

A flaw detection machine with parallel lifting function, adapted for detecting flaw without demounting wheels, includes a trolley, slidable along steel rail, a base frame, a jacking apparatus and a tread flaw detecting device provided on the trolley, a first jacking mechanism for driving the jacking apparatus to move up and down, a second jacking mechanism for driving the tread flaw detecting device to move up and down, the tread flaw detecting device has a vertical frame, a tread probe manipulator provided at an upper end of the vertical frame, a tread probe frame provided on the tread probe manipulator, and the jacking apparatus is mounted on the vertical frame and able to slide up and down along an inner side wall of the vertical frame.

A non contact sensor for use in magnetostrictive testing of a solid ferrous structure. In its simplest form, the sensor has a set of permanent magnets arranged in a row with their poles in the same direction, an electrical coil wrapped around the set of magnets, wrapped in direction parallel to the common poles of the magnets, thereby forming a top portion above the set of magnets and a bottom portion below the set of magnets, and a metal shield interposed between the top portion of the coil and the set of magnets. The sensor is operable such that a time varying current in the coil causes guided waves to travel to the structure and to be reflected from anomalies in the structure even when there is no ferromagnetic coupling material between the sensor and the structure.

The present invention discloses a inspection device for detecting a defect of a metal object, where the inspection device includes a main base, at least one main magnetic module, and a main inspection module. The at least one main magnetic module is installed on the main base, for attaching the main base onto the metal object under an action of a magnetic force. The main inspection module is installed on the main base, to detect at least one type of defect of the metal object. The present invention further discloses a wheel defect inspection method and a wheel defect inspection device. The metal object defect inspection device may implement automatic detection of a defect on a whole circumference of a wheel.

A railway vehicle wheel defect detection precision inspection device includes a lower frame module, an upper frame module, a fixing module, a rotational module, a first inspection module, and a second inspection module. The lower frame module forms a lower space. The upper frame module has a structure that is movable in a horizontal direction and thus is coupled to the lower frame module to form an upper space. The fixing module is located in the lower space to fix a wheel. The rotational module rotates the wheel on a side portion of the fixing module. A pair of first inspection modules each has a structure surrounding an outer surface of a rim part of the wheel in the upper space, are disposed at symmetrical locations with respect to a wheel center point, and perform defect inspection on a web part of the wheel using ultrasonic waves. The second inspection module is disposed at a location in contact with a side surface of the rim part on a central upper end portion of the wheel in the upper space and performs defect inspection on the rim part of the wheel using ultrasonic waves. A third inspection module performs defect inspection by radiating a laser beam on a surface of the rim part of the wheel in contact with a rail in a side space of the inspection device and receiving the reflected laser beam.

An apparatus and method for detecting an initial lubrication of a moving component including an ultrasonic sensor for detecting an ultrasonic output signal from the moving component and a processor for operating on the output signal. The processor determines if there has been an initiation of a lubrication operation. After identifying the initiation of the lubrication operation, the processor monitors the ultrasonic output signal received from the ultrasonic sensor to detect a momentary increase in the amplitude of the ultrasonic output signal above a level that indicates a need for lubrication, and which is indicative of an initial interaction between a lubricant and the moving component. Upon detecting the momentary increase in the amplitude, the processor tracks a progress of the lubrication operation by detecting for a sustained decrease in the amplitude of the ultrasonic output signal received from the ultrasonic sensor.

Provided are a device and method for detecting a fitting degree of a connecting rod bushing by an ultrasonic wave. A big head hole fixture comprises multiple positioning blocks, and the positioning blocks in a transverse section have a common point; an ultrasonic probe is capable of moving up-down and left-right and rotating; a center of the ultrasonic probe, a center of the big hole fixture and a center of a connecting rod body fixture are located on a straight line; when the device works, a connecting rod is positioned and then the fitting degree of the connecting rod bushing is detected; the multiple positioning blocks are capable of moving and contacting with an inner wall of a big head hole, the connecting rod body fixture is capable of moving and clamping the connecting rod and the ultrasonic probe is capable of moving to contact with the connecting rod bushing.