Methods and devices are provided for detecting, corrosion and cracks in fastener nuts. In an exemplary embodiment, an apparatus can be configured to couple to a fastener nut to facilitate inspection of the fastener nut for detection of flaws in the fastener nut, such as corrosion and cracks. The apparatus can be configured to couple to the fastener nut when the fastener nut is mounted on a fastener and in use in a larger system such as a subsea drilling apparatus or other system in which fasteners with fastener nuts attached thereto are used. The apparatus can include an ultrasonic probe configured to facilitate inspection of the fastener nut using ultrasonic waves.

An anchor bolt diagnosing system includes a vibration sensing clip that clips an anchor bolt, and senses a vibration power of the anchor bolt, a blow sensing hammer that gives a blow to the anchor bolt clipped by the vibration sensing clip, and senses blow strength, and a diagnoser that obtains the vibration power and the blow strength output from the vibration sensing clip and the blow sensing hammer, and diagnoses soundness of the anchor bolt in accordance with whether a ratio of the vibration power to the blow strength is higher than a predetermined value.

A fastener probe assembly includes a disc configured to rotate about a first axis of a fastener, an ultrasound probe coupled to the disc, and an encoder configured to determine an orientation of the ultrasound probe relative to the first axis of the fastener during an inspection of the fastener. The ultrasound probe is configured to interface with an axial end of the fastener, to emit ultrasound signals into the axial end of the fastener, and to receive ultrasound signals from the fastener.

A method for the ultrasonic double-wave measurement includes: obtaining a first mode wave time-of-flight and a second mode wave time-of-flight of an ultrasonic double-wave of a solid material at a first temperature and stress state; measuring a first mode wave time and a second mode wave time of the ultrasonic double-wave of the solid material in an unknown state; obtaining a first mode wave temperature influence coefficient and a second mode wave temperature influence coefficient of the solid material, and a first mode wave pre-tightening force influence coefficient and a second mode wave pre-tightening force influence coefficient in the solid material to be measured having the same specification and geometric shape; and obtaining a relative change relationship of ultrasonic double-wave time-of-flight according to the first-order or second-order Taylor approximation, and jointly solving to obtain a measured pre-tightening force and a measured temperature.

An apparatus for bolt inspection are presented. The bolt has a cylindrical threaded surface delimited by a pair of end faces that are opposite to each other. An ultrasonic transducer device contacts one of the pair of end faces for performing a scan operation. A guide structure is engaged with the bolt that guides a motion of the ultrasonic transducer device such that only a portion of a transducer contact surface contacts the one of the pair of end faces during the scan operation. The guide structure delimits a radial extent of the motion of the ultrasonic transducer device during the scan operation.

The purpose of the present invention is to provide a nondestructive inspection method and nondestructive inspection device for an anchor bolt capable of quantitatively inspecting the health of an anchor bolt fixed to a foundation by a metallic anchor. Provided is a nondestructive anchor-bolt inspection method for inspecting the health of an anchor bolt fixed to a foundation by a metallic anchor, wherein a striking sound is produced through the striking of a portion of the anchor bolt exposed from the surface of the foundation, frequency information is obtained through the reception and frequency analysis of the signal waveform of the striking sound, and the health of the anchor bolt is nondestructively and quantitatively inspected on the basis of the frequency information for the signal waveform. Also provided is a nondestructive inspection device for an anchor bolt.

This invention provides a method and device for nondestructive testing of an anchor bolt. Said method and device make it possible to quantitatively test the soundness of an anchor bolt affixed to a foundation via an adhesive anchor. In this method for nondestructive testing of an anchor bolt, in which the soundness of an anchor bolt affixed to a foundation via an adhesive anchor is tested, a section of the anchor bolt that is exposed from the surface of the foundation is hit so as to produce an impact noise, a signal waveform corresponding to said impact noise is received and subjected to frequency analysis so as to obtain frequency information for said signal waveform, and the soundness of the anchor bolt is nondestructively, quantitatively tested on the basis of said frequency information.

A track bolt for an undercarriage system includes a head portion. The track bolt also includes a body portion extending from the head portion. The track bolt further includes a piezo ceramic sensor mounted in a counter bore provided in the track bolt. The piezo ceramic sensor measures a value of track bolt elongation such that the value of the track bolt elongation is used to calculate a clamping force in the track bolt. The track bolt includes a plug member disposed in the counter bore for sealing the piezo ceramic sensor.

A track bolt for an undercarriage system includes a head portion. The track bolt also includes a body portion extending from the head portion. The track bolt further includes a piezo ceramic sensor mounted in a counter bore provided in the track bolt. The piezo ceramic sensor measures a value of track bolt elongation such that the value of the track bolt elongation is used to calculate a clamping force in the track bolt. The track bolt includes a plug member disposed in the counter bore for sealing the piezo ceramic sensor.

A system is provided having a probe assembly configured to inspect components of an assembled flange connection when the probe assembly is disposed within a bore of the components. The probe assembly includes a shaft configured to be aligned with an axis of the assembled flange connection, one or more ultrasound probes coupled to the shaft, and one or more encoders. The one or more ultrasound probes are configured to interface with an interior surface of the bore of the components, to emit ultrasound signals into the components, and to receive ultrasound signals from the components. The one or more encoders are coupled to the shaft and are configured to determine a position of the one or more ultrasound probes relative to a reference point of the assembled flange connection during an inspection of components of the assembled flange connection.