A defect inspection device (100) includes an excitation unit that excites an elastic wave, an irradiation unit (2) that applies laser lights, a measurement unit (3) that measures the interfered laser lights, and a control unit that acquires vibration state information which is information about a state of the elastic wave excited in an inspection target (P) for a plurality of frequencies by changing a frequency of excitation vibration caused by the excitation unit in order to excite the elastic wave in the inspection target (P), and extracts recommended frequencies (F) recommended for inspecting a defect of the inspection target (P) from among the plurality of frequencies based on the acquired vibration state information for the plurality of frequencies.

Chirp waves generated in a transmitting/receiving unit is supplied to ultrasonic sensors. Signals output from the ultrasonic sensors are supplied to the transmitting/receiving unit and summed in a signal processing/recording unit. The signal processing/recording unit performs mutual correlation processing between the summed signals and the chirp waves and calculates a peak generation time difference. Necessity of exchanging a pipe is determined by calculating and recording the thickness of a pipe from the calculated time difference and calculating a difference between thicknesses measured in the past and the present.

The present invention relates to a suspension arrangement for suspending ultrasonic testing probes. The present invention also relates to a support frame for a suspension arrangement of this type. The present invention also relates to a testing system with a support frame and at least one sensor, or to a testing system with a suspension arrangement. In addition, the present invention relates to a method for measuring with the suspension arrangement or with the testing system, wherein the following method steps are carried out: introducing (S100) a test piece, in a guide direction, into a holding frame with a passage for passing the test piece through in the guide direction: introducing (S200) the test piece. in the guide direction, into a support frame which is adjacent to the holding frame in the guide direction and is provided to support at least one ultrasonic testing probe for testing the test piece: and actuating (S300) the at least one sensor attached to the support frame, for an examination of the test piece using the sensor. Finally, the invention relates to a computer program which carries out this method, and to a computer-readable medium which has corresponding electronically stored method steps.

A method of testing a part includes placing a first member on a part to be tested. A second member is placed on an opposed surface of the part. One of the members has an ultrasonic transmitter and the other has an ultrasonic receiver. At least one of the members has at least one magnetic element and the other has at least one of a magnetic element or a ferromagnetic metallic element which is attracted to magnets. One of the members moves along the surface of the part such that magnetic attraction causes the other to move along the opposed surface of the part with the one of the members. A controller causes an ultrasonic signal to be sent from the transmitter through the part to be tested which is received by the receiver and then analyzed by an ultrasonic testing machine.

The invention is part of the field of inspection technologies, materials, equipment and corrosion, more specifically, of the field of equipment for measuring thickness in subsea pipelines. For this purpose, the present invention describes a device for measuring thickness of pipelines comprising: a manipulator, configured to be the contact region with an ROV; an impact absorber, configured to absorb the horizontal impact of the device; at least two turning devices, configured to be the devices that enable the rotation of the device; a c shaped joint; a measurement adapter, comprising: a support, a base of the prism, a magnet prism, at least one pair of rectangular magnets, and at least two pairs of circular magnets; a T shaped support; and a mini camera support. Thus, the invention, as it does not require an electrical or hydraulic system, is considered more robust and less prone to failure, in addition to being safer for the environment. In addition, it generates greater ease of manufacture, maintenance, transportation, handling by the ROV and flexibility of general use, in addition to providing greater safety in the operations.