This disclosure relates to fluid conduit that incorporates sensors printed on an exterior wall of the fluid conduit configured to sense an operating parameter of the fluid conduit. A wireless communication device communicatively connected to the printed electronic material is configured to wirelessly transmit the operating parameter to a mobile device.

A detection method of nonlinear ultrasonic guided wave with carrier modulation is described. The high and low frequency components are determined according to the frequency response characteristics of the detection object, and the high-frequency components are processed by delay and combined with the low-frequency components to form a carrier modulation signal. The single excitation and single receiving mode are adopted for signal acquisition. The carrier modulation signal with high frequency and low frequency components is excited by a single transducer. The nonlinear modulation effect is produced by the interaction between the carrier signal and the damage, and the signals are collected by the receiving transducer through transmission method. According to the arrival time of high frequency components and the time of end reflection echo, the signal is intercepted and analyzed. After filtering and normalization processing, the received signal is decomposed by empirical mode decomposition (EMD). According to the decomposed IMF spectrum information, IMF components including fundamental frequency and nonlinear frequency components are used for signal reconstruction. The difference frequency components generated by the modulation of high-frequency and low-frequency, namely nonlinear components, are extracted, and the non-linear coefficient is calculated. The damage degree of materials is evaluated based on the nonlinear coefficient of nondamaged state.

A method and system for easily predicting a remaining lifetime of a hose are provided. A hose remaining lifetime prediction method and a hose remaining lifetime prediction system, for predicting a remaining lifetime of a hose 1 in use, include obtaining in advance, for a hose of the same type, relationship between use time of an inner tubular rubber layer 11 at a reference temperature and a physical property value of rubber forming the inner tubular rubber layer 11, generating a thermal degradation model for the inner tubular rubber layer 11, calculating, for the hose 1 in use, reference temperature use time being use time of the inner tubular rubber layer 11 at the reference temperature until a time of the prediction, and predicting the remaining lifetime of the hose 1 in use, based on comparison between the reference temperature use time and the thermal degradation model.

Assembly comprising: a set of strands that extends in a direction of tension in which the set of strands is intended to experience tensile stresses; at least one diagnostic fiber that is integrated into the set of strands and able to conduct light, the light propagating through the diagnostic fiber between an entrance end and an exit end, that extends in the direction of tension, and that has a mechanical tensile strength close to that of one of the strands; and a diagnostic device comprising a light source for sending a light beam into the diagnostic fiber via the entrance end, a first optical sensor for delivering a signal representative of the light intensity at the exit end of the diagnostic fiber, the light intensity at the exit end of the diagnostic fiber being correlated to the mechanical state of the diagnostic fiber.

A monitoring system (100) monitors displacement of a wind turbine tower and includes at least one plumb bob with an upper part and a lower part, each plumb bob being configured to be pivotally suspended at its upper part, via a suspension device, from a point above so as to attain a rest position in a rest situation, and each said plumb bob has one or more sensing surfaces (12, 12′). One or more suspension devices means (10) suspend the at least one plumb bob. Two or more sensors (14, 14′, 14″), each being configured to sense, in a specific sensing direction (16, 16′, 16″), a distance to a plumb bob, provide displacement data. At least two of the two or more sensors (14, 14′, 14″) are arranged in a sensing vicinity of a plumb bob, with at least two of the specific sensing directions (16, 16′, 16″) not being parallel to each other. The monitoring system includes a control unit (18) configured to receive the displacement data from two or more of the sensors, and a device for reporting, to an external unit (20), parameter(s) representing displacement of a wind turbine tower.

The present invention relates to a method of fatigue testing an elongate specimen, such as a wind turbine blade, comprising: calculating a service life damage sum at one or more locations on at least one respective first section of an elongate specimen, responsive to at least one strain time history associated with the specimen; determining a predicted test damage sum at the one or more locations for each of a plurality of predetermined test blocks separately applicable to the specimen; and selecting at least one test block associated with the plurality of predetermined test blocks based on a comparison of the predicted test damage sum with the service life damage sum for each of the one or more locations, wherein the selected at least one test block is applicable to the specimen to cause a test damage sum at each of the one or more locations that at least substantially matches the service life damage sum at each of the one or more locations.

A system may include a hose assembly and a controller. The hose assembly may comprise a plurality of sensor devices configured to generate sensor data regarding the hose assembly. The sensor data may include at least one of first sensor data regarding a bend radius of a first portion of the hose assembly, or second sensor data regarding an amount of torque at a second portion of the hose assembly. The controller may be configured to receive the sensor data from the plurality of sensor devices; determine a remaining life of the hose assembly based on the sensor data; and perform an action based on the remaining life of the hose assembly.

A method for discovering, identifying, and monitoring of mechanical defects in a ferromagnetic underground or underwater structure. A magnetic scanner portable device is used to inspect the ferromagnetic underground structure and identify at least one portion with a magnetic field anomaly. Sets of permanent magnetic scanner sensors to monitor the magnetic field anomaly are placed adjacent to the at least one portion of the underground structure. A calculation unit, coupled to the sets of permanent magnetic scanner sensors is used to collect and process data. A stress-deformed state (SDS) and a risk-factor (RF) of the at least one portion with the magnetic field anomaly is presented on a display unit, which is coupled to the calculation unit.

A surface mounted monitoring system is disclosed that is useful for detecting the presence of both ordinary and excessive loads on a surface, and for providing real-time or near real-time trending data. The system includes an array of force transducers disposed on the exterior surface of a structural member such as a roof. In an exemplary embodiment, transducers may be placed on an interior surface, such as embedded within insulation. The force transducers detect the magnitude of a load force acting on the surface. A data analysis module (DAM) may record force readings in a circular memory buffer, so that recent data can be recovered in the event of a catastrophic collapse. The DAM may also communicate with a monitoring device that can display real-time loading data to a user and perform other analysis.

A system includes an electromagnetic inspection device, a processing device, and a memory device. The electromagnetic inspection device includes at least one transmitter that can transmit an electromagnetic signal toward a wall of a flexible pipe. The electromagnetic inspection device also includes at least one receiver that can receive at least one scattered electromagnetic signal from the wall of the flexible pipe. The memory device includes instructions executable by the processing device to cause the processing device to transmit an electromagnetic signal using the transmitter, to receive the scattered electromagnetic signal using the receiver, and to identify at least one anomaly in the wall of the flexible pipe using the scattered electromagnetic signal.