A device and method for testing the working performance of an anchor rod cable by simulating stratum fracture and separation on the basis of electromagnetic action, applicable to the technical field of testing working performance of anchor rod cables by simulating a tunnel field. The device comprises a top base (1) and a bottom base (2); a plurality of hydraulic vertical columns (3) are provided between the top base (1) and the bottom base (2); the plurality of hydraulic vertical columns (3) are provided thereon with clamping devices, and an electromagnetic block (9) is disposed between two groups of drawing block-shaped clamp holders (4). Using the attraction and repulsion forces of the electromagnetic block (9), the laminated electromagnetic block generates the separating or fracturing effect in a loading process so as to simulate the interaction between surrounding rock and an anchor rod cable test piece (8) in the field and accurately record various performance parameters of a working status of the anchor rod cable test piece (8), thereby providing positive guidance for directing field work.

A monitoring system is disclosed herein that is configured to utilize a distributed sensing system to monitor both a cable and cable accessories included within a cable circuit. In various embodiments, the monitoring system may include a distributed sensing system and one or more cable accessory wrap assemblies. The distributed sensing system may include a distributed sensing fiber following (or integrated into) the cable and connected to a cable accessory wrap assembly for each of the one or more cable accessories in-line with cable. In various embodiments, each cable accessory wrap assembly may comprise a cable wrap embedded with a distributed sensing fiber. The distributing sensing fiber of a cable accessory wrap assembly may be configured to provide measurements to distributed sensing system indicating that an anomaly event occurred at a given cable accessory.

An arrangement for distributed acoustic sensing and sensor integrity monitoring is adapted to operate in a first operation mode and in a second operation mode. In the first operation mode, the arrangement injects a first light pattern (and successively injects a second light pattern having substantially the same wavelength, both light patterns generated using a light launching module, into the fiber; determines a backscatter change between first backscatter dependent light and second backscatter dependent light detected by the detector, to determine a time change of a characteristic of the fiber. In the second operation mode, the arrangement injects another first light pattern and successively another second light pattern; to determine a backscatter average of other first backscatter dependent light and other second backscatter dependent light detected by the detector, to determine a static characteristic of the fiber.

A method for determining a fluid pressure parameter related to a fluid located within a fluid conduit, the method may include measuring one or more resistances of one or more nanoparticle based sensing elements to provide sensed information; wherein the one or more nanoparticle based sensing elements comprise nanometric particles having an electrical resistance that is responsive to at least one out of pressure and temperature; wherein the one or more nanoparticle based sensing elements are printed between conductive electrodes, wherein the conductive electrodes are either printed on an exterior of the fluid conduit or are formed on a substrate that is attached to the exterior of the fluid conduit; and determining, based on the sensed information, the fluid pressure parameter.

A pipeline pressure test that accounts for measurement uncertainties includes a method for performing a pressure test of a pipe section of a pipeline including receiving a desired pressure to be applied to the pipe section and a duration of time the desired pressure is to be applied to the pipe section, receiving a pressure measurement of a fluid, a temperature measurement of the fluid, a volume measurement of the fluid, and a pipe section strain measurement, determining a change in fluid pressure and a volume change, determining a pressure change uncertainty and a volume change uncertainty, checking that the pressure change uncertainty is within a pressure uncertainty threshold and that the volume change uncertainty is within a volume uncertainty threshold, determining whether the desired pressure has been applied to the inner surface of the pipe section for the duration of time; and outputting a result of the testing.

It is described a method and arrangement of fibre optic distributed sensing for detection of an event at an event location within a blind region, the method comprising: using at least one optical fibre arranged at least partly along an object to be monitored and at least one light pattern interrogator coupled with the optical fibre; injecting light patterns at subsequent times; detecting backscatter light from the light patterns; and analysing the backscatter light to determine the event location.

The present invention relates to a sensor device, system, and monitoring system for monitoring force and inclination of load supporting members, such as temporary support props. The sensor devices include a tubular member that interface with and slidably/detachably attached to the temporary support props, and sensors on the tubular member for measuring force, inclination and position of the temporary support props for construction and demolition work. The sensor device includes a controller for processing data from the sensors. The sensor system includes a wireless device that communicates with the sensor device. The sensor system further comprises positioning device, such that precise location or position of the sensor devices may be detected/calculated by the sensor system. The monitoring system includes a server that communicates one or more sensor systems to form a network.

Sensor (1) for monitoring the parameters of rotation around its own axis and vibration of a steel rope (100), comprising a battery (2), indicator means (3) of the state of charge of said battery (2), at least a LED indicator (5), a power unit (7) which supplies the sensor (1), a detection unit (8) of the rotation angles (ϕ, γ) around its own axis (X) and of the vibrations of said steel rope (100), a microprocessor (9) for collection activity and data transmission, said sensor (1) being housed in a portion obtained in the core (110) of the steel rope (100).

A method for detecting a structural anomaly in a pipeline supply network is disclosed where the pipeline supply network is configured to supply fluid to multiple receiving locations. The method comprises receiving acoustic signal data from a selected location in the pipeline supply network and generating a first time window of acoustic signal data based on the acoustic signal data. The method then includes benchmarking the first time window of acoustic signal data with respect to historical background acoustic signal data characterising the pipeline supply network to generate a corresponding background benchmarked first time window of acoustic signal data and then determining an anomaly measure for the background benchmarked first time window of acoustic signal data where the anomaly measure indicates a presence of the structural anomaly.

A testing device for simulating frictional wear behaviors of threaded joints of a drill pipe under turbid seafloor environment, including a support, an oil cylinder, upper and lower specimens, a first motor, several second motors, stirring rods, a turbidity sensor, and a test tank. The oil cylinder and test tank are arranged on the support. A piston rod of the oil cylinder is connected to the first motor. A rotating-speed sensor is arranged on a bottom surface of the first motor, facing toward an output shaft of the first motor. The output shaft of the first motor is connected to an upper end of a torque limiter. A lower end of the upper specimen fits an upper end of the lower specimen under loading of a main shaft of the first motor. The stirring rods are provided at two sides of the test tank.