Method and system is described for enhanced subsea leak detection by using autonomous underwater vehicle (AUV) that is equipped with measurement components and navigation components. The method and system may include a one or more wireless communication components for navigation. Also, the method and system may include one or more sensors to detect leakage from a pipeline.

A method for monitoring the structural health of a structure that supports guided propagation modes of elastic waves, includes the following steps: a) acquiring an ambient noise propagating through the structure by means of at least one pair of non-collocated elastic-wave sensors; b) estimating a function representative of an impulse response of the structure for elastic propagation between the constituent sensors of said pair; c) extracting at least one dispersion curve of the elastic propagation through the structure by time-frequency analysis of this function representative of an impulse response; and d) estimating at least one parameter indicative of a mechanical property of a constituent material of the structure from the dispersion curve obtained in step c). A system for implementing such a method is also provided.

A system for monitoring the erosion of internal components of a valve having a valve (200, 300, 400) which in turn comprising a body (44, 17, 24), a trim (46, 19, 26) and a seat (21, 28, 48) and at least an ultrasonic probe (22, 40, 29) able to transmit ultrasonic waves through the internal components and receive waves reflection through. In this system, the gaps between the internal components of the valve are closed and the distances between them are almost equal to zero so that the continuity between components is able to transfer the waves determining therefore the distance between the ultrasonic probe (22, 40, 29) and the internal component to be monitored.

Condition based engine parts (e.g., movable engine parts) monitoring is disclosed. The techniques may enable detecting cracks present in engine parts while the engine is operational. In one embodiment, a system includes a wireless sensor configured to be disposed on a movable part internal to a machine and communicate wirelessly and a controller that includes a processor. The processor may be configured to initiate communication with the wireless sensor by receiving a wireless signal indicative of a frequency of vibration of the internal movable part from the wireless sensor, to obtain an acceptable threshold range of vibrations for the internal movable part from one or more data sources, to determine whether the frequency of vibration is within the acceptable threshold range of vibrations for the internal movable part, and to initiate preventative actions when the frequency is not within the acceptable threshold range.

Disclosed is a piezoelectric transducer of the type including a stack of a contact piece, a piezoelectric pellet and a support of very great stiffness. Specifically, the contact piece forms tips, the respective apex of which constitutes contact points that are spatially isolated from one another. Also disclosed is a process for the manufacture of such a contact piece as well as a resonant ultrasound spectroscopy device including one or more of such piezoelectric transducers.

A computer with a proper program generates a phased array sequence of signals. In a pulser with delays, the signals are fed through a multiplexor into multiple water wedges that are attached to a globe valve being tested. For a sequential operation of the globe valves from the open to the closed position, ultrasonic signals are transmitted through the fluid contained in the valve and reflected back through piezo-electric crystals to the multiplexor. By summation and merger of the signals, an image can be developed of the operation of the globe valve to determine if the globe valve is operating properly. By comparing the signals received with a known standard for that globe valve, proper operation, or lack thereof, of the globe valve under test can be determined. Separation of the valve stem from the globe can also be measured.

Methods, systems, and devices for abnormal sound detection are described. An audio recording of a mechanized environment may be obtained. First sounds extracted from the audio recording may be categorized into a set of categorical sounds. A library of first sound patterns may be generated using the categorical sound and based on second sounds extracted from the audio recording. The first sound patterns may include sequences of the categorical sounds. Audio data including audio signals capture by sensors in the mechanized environment may be received, and second sound patterns detected in the audio signals may be compared with the first sound patterns. Based on comparing the second sound patterns with the first sounds patterns, a sound pattern that is not in the library of the first sound patterns may be identified. An alarm may be generated based on detecting the sound pattern a threshold quantity of times.

According to an embodiment, a linear-scan ultrasonic inspection apparatus comprises: an ultrasonic array probe having ultrasonic elements aligned in a first direction; a delay-time calculator configured to calculate, referring to the surface shape of the test object, values of delay time of at least one of transmitting and receiving ultrasonic wave; an overlapping-region adjustor configured to set conditions for generating an image of an overlapping region; and an integrated-image generator configured to generate first image data of a region including the overlapping region. The overlapping-region adjustor is configured to set the conditions of the surface shape to be referred to the delay-time calculator in calculating the values of the delay time at either the first-probe setting position or the second-probe setting position as both of a first acquired shape obtained at the first-probe setting position and a second acquired shape obtained at the second-probe setting position.

Systems, methods, and devices are disclosed for inspecting a manufacturing component. Devices include a centering device configured to modify a position of an ultrasonic probe assembly relative to a manufacturing component to bisect an angle associated with the manufacturing component. Devices may also include a surface sensing device configured to sense a curvature associated with the manufacturing component. Devices may further include a plurality of sensors configured to measure a first displacement value associated with the centering device and a second displacement value associated with the surface sensing device. The devices may include a control circuit configured to determine a position adjustment value based on at least one of the first displacement value and the second displacement value. The devices may also include an actuator configured to modify a position of an ultrasonic transducer based, at least in part, on the position adjustment value.

The invention relates to an apparatus and a method for inspecting an elongated tube-like object. The apparatus comprises a body (1, 2) for moving along the elongated tube-like object by clamping the object; and a sensor frame (15, 15b, 15c) supporting one or more sensors (20) for measuring a state indication property. One or more one or more body-to-sensor-frame connections (39, 40, 43, 72b, 72c) connect the sensor frame (15, 15b, 15c) to the body (1, 2), wherein the one or more body-to-sensor-frame connections (39, 40, 43, 72b, 72c) are arranged to allow an adjustable relative position between the sensor frame and the body, while the sensor frame can position itself with respect to the tube.