277 results about "Structural monitoring" patented technology

Method and system for monitoring structures such as bridges includes arranging sensors on the structure, obtaining data via the sensors, analyzing the data to determine the presence of a non-optimal condition relating to the integrity of the structure and transmitting the data or a signal indicative of the analysis with an identification or location of the sensors and the structure to a remote monitoring facility. Transmission of the signal may be performed via satellite and / or the Internet to the monitoring facility which can schedule maintenance or repair of the structure. The monitoring facility would receive the identification or location of the structure to know where maintenance is required and the location of the sensor(s) reporting the condition which give rises to the need for maintenance and thus can accurately direct the personnel to the damaged area of the structure.

Disclosed is a bridge construction and maintenance whole-process intelligent monitoring, assessment, alarming and decision-making system and method. The bridge construction and maintenance whole-process intelligent monitoring, assessment, alarming and decision-making system is composed of an intelligent collecting module and an intelligent assessment, alarming and decision-making module, wherein the intelligent collecting module integrates laser radar three-dimensional high-precision scanning technology, building information model technology and wireless intelligent sensing technology and intelligently collects multi-source heterogeneous multi-dimensional high-precision information during a bridge construction and maintenance whole process such as environment monitoring information, structure monitoring information and project process quality safety management information; the intelligent assessment, alarming and decision-making module integrates big data processing technology, cloud computing technology, artificial neural network algorithms and virtual reality technology and structures multi-stage safety alarming indexes and emergency decision-making database to perform online, real-time, high-precision, visual and intelligent assessment analysis, alarming and decision-making on structure and traffic safety performance of the bridge construction and maintenance whole process.The bridge construction and maintenance whole-process intelligent monitoring, assessment, alarming and decision-making system covers the bridge construction and maintenance whole process and has the advantages of being high in efficiency and precision, visualized, intelligent and the like.

System for monitoring a structure includes at least one monitoring arrangement attached at a respective location to the structure, each monitoring arrangement having at least one inertial measurement unit (IMU) that measures acceleration and / or angular motion in any direction and rotation about any axis, a Global Navigation Satellite System (GNSS) receiver that determines its location, and a wireless communication system that transmits information derived from acceleration and / or angular motion measured by the IMU and a location determination by the GNSS receiver. Further, each monitoring arrangement may include a microphone, chemical sensor, a visual or IR light sensor, a radiation sensor, a magnetic sensor, and / or a strain sensor. As an alternative, the monitoring arrangements may include only IMUs or only GNSS receivers.

The invention provides increased structural monitoring systems that have sensitive continuous coaxial cable sensors. A preferred embodiment sensor cable of the invention includes an inner conductor, a dielectric jacket, and an outer conductor that is configured to passively deform responsively to strain in an associated structure. The deformation can be aided by the physical structure of the dielectric jacket, the outer conductor, or a combination of both. The deformation translates strain into a measurable change in a reflection coefficient associated with the outer conductor.

The invention discloses a method for paving internal concrete distributed sensing fibers, which comprises the following steps: A) checking and cleaning a fiber conduit embedded in the concrete; B) blowing the sensing fibers into the fiber conduit through a fiber gas blowing port; C) selecting a grouting section, injecting slurry into a grouting port of the grouting section, closing a slurry outlet of the grouting section after the slurry is full of the grouting section, and keeping the slurry in the grouting section for 3 to 5 minutes under the pressure of between 1.0 and 1.5MPa so as to fix the sensing fibers in the fiber conduit; and D) circularly operating the step C) till the grouting of all the grouting sections is finished. The method achieves quick and lossless pavement for the long-distance distributed sensing fibers, solves the difficult problem that the structure monitoring field cannot embed the distributed sensing fibers into the concrete, ensures the distributed fiber sensing technology to monitor the structural strain and temperature more effectively, and realizes structural long-term and stable healthy survey.

A method and apparatus for monitoring a structure using an optical fiber based distributed acoustic sensor (DAS) extending along the length of the structure. The DAS is able to resolve a separate acoustic signal with a spatial resolution of 1 m along the length of the fibre, and hence is able to operate with an acoustic positioning system to determine the position of the riser with the same spatial resolution. In addition, the fiber can at the same time also detect much lower frequency mechanical vibrations in the riser, for example such as resonant mode vibrations induced by movement in the surrounding medium. By using vibration detection in combination with acoustic positioning then overall structure shape monitoring can be undertaken, which is useful for vortex induced vibration (VIV) visualisation, fatigue analysis, and a variety of other advanced purposes. The structure may be a sub-sea riser.

The invention relates to a piezoresistive / piezoelectric interlayer material and preparation and application methods thereof, and an interlayer type sensor and preparation and application methods thereof, used for engineering structure monitoring. The piezoresistive / piezoelectric interlayer material comprises a tenacious substrate, 5-50 self-assembly film piezoresistive perception function layer double-layers, i.e., top / bottom electrode layers, and a piezoelectric perception elastic core sandwich function layer which is prepared by a nanometer ZnO / PDMS or PVDF / PDMS and can comprise a stainless steel spring. After integral packaging, an interlayer type sensor pasted to the surface of an engineering structure or an embedded interlayer type sensor is obtained, the sensor has the advantages of good flexibility, high piezoresistive / piezoelectric perception sensitivity covering a full traffic frequency domain, good linearity, high stability and the like, and basic functions of such a structure itself are not affected.

A improved method of monitoring a structure by mounting a sensor within a cavity of the structure to measure at least one of strain experienced by the structure and vibration experience by the structure. Mounting a wireless communication unit mounted within the structure and connecting the wireless communication unit to the sensor to receive data from the sensor and transmit the data to a receiver outside the structure. Mounting a power supply within the structure and connecting the power supply to the sensor and the wireless communication unit to supply necessary electrical power to the sensor and the communication unit.

A wearable defibrillator system includes a support structure with one or more electrodes in an unbiased state. A monitoring device monitors, for the long term, a parameter of the person that is not the person's ECG; rather, the monitored parameter can be the person's motion, a physiological parameter, or both. When a value of the monitored parameter reaches a threshold, such as when the person is having an actionable episode, the electrode becomes mechanically biased against the person's body, for making good electrical contact. Then, if necessary, the person can be given electrical therapy, such as defibrillation. As such, the electrodes of the wearable defibrillator system can be worn loosely for the long term, without making good electrical contact. This can reduce the person's aversion to wearing the defibrillation system.

A wind turbine blade (1) incorporating an optical fibre (4) configured for structural monitoring of the turbine blade. The optical fibre comprises at least one strain sensor (5). One end of the optical fibre (4) is an output point, which is connected to a data processing device (3) configured to process signals from the strain sensor (5). The other end of the optical fibre is an alternative output point, which is also connectable to the data processing device, such that in the event of a breakage in the optical fibre, signals from the strain sensor are available from at least one of the output points.

The invention discloses a stratum digital twin modeling method and system based on a multi-platform structure, and the method comprises the steps: building a preliminary geological model on a GIM modeling platform through geological survey data and a design scheme at the initial stage of construction, building a preliminary tunnel model on a BIM modeling platform, and setting model monitoring points; performing model integration to obtain an integrated GIM + BIM model, and uploading the integrated GIM + BIM model to a network platform; arranging a monitoring system corresponding to the model monitoring points, establishing a monitoring database, and hooking a network platform; in construction, correcting the integrated GIM + BIM model through advanced geological prediction before excavation; and after the tunnel is excavated and the stratum is exposed, determining the actual stratum situation surrounding the tunnel, correcting the GIM + BIM model again, and pre-judging the stratum situation of the next excavation section. Multi-platform integration of forming a three-dimensional geologic model, a structure monitoring model and a monitoring data database at a network end is realized, and a GIM + BIM data comprehensive platform concept is provided.

A system and method for monitoring the structural integrity of a structure is provided. An optical fiber is acoustically coupled to one or more of the structural elements. A source of optical energy is configured to inject optical energy into the optical fiber, and an optical detector is configured to detect a first optical return signal having characteristics that are affected by vibrations of the structural elements. An analyzer measures characteristics of the optical return signal to determine information concerning the movement of the structural elements monitored by the fiber optic cable. The results of the analyzer can be stored and so that the analysis of the optical return signal can be compared to previously recorded signals to determine changes in structural integrity over time. Multiple fibers can be acoustically coupled to the monitored structural elements to obtain additional data concerning the structural integrity.