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548 results about "Structural health monitoring" patented technology
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Structural health monitoring (SHM) refers to the process of implementing a damage detection and characterization strategy for engineering structures. Here damage is defined as changes to the material and/or geometric properties of a structural system, including changes to the boundary conditions and system connectivity, which adversely affect the system's performance. The SHM process involves the observation of a system over time using periodically sampled response measurements from an array of sensors (often inertial accelerometers), the extraction of damage-sensitive features from these measurements, and the statistical analysis of these features to determine the current state of system health. For long term SHM, the output of this process is periodically updated information regarding the ability of the structure to perform its intended function in light of the inevitable aging and degradation resulting from operational environments. After extreme events, such as earthquakes or blast loading, SHM is used for rapid condition screening and aims to provide, in near real time, reliable information regarding the integrity of the structure. Infrastructure inspection plays a key role in public safety in regards to both long-term damage accumulation and post extreme event scenarios. As part of the rapid developments in data-driven technologies that are transforming many fields in engineering and science, machine learning and computer vision techniques are increasingly capable of reliably diagnosing and classifying patterns in image data, which has clear applications in inspection contexts.
System and method for time reversal data communications on pipes using guided elastic waves
ActiveUS20130279561A1Efficient communicationClean signals for demodulationFrequency/rate-modulated pulse demodulationPosition-modulated pulse demodulationDiagnostic Radiology ModalityStructural health monitoring
Embedded piezoelectric sensors in large civil structures for structural health monitoring applications require data communication capabilities to effectively transmit information regarding the structure's integrity between sensor nodes and to the central processing unit. Conventional communication modalities include electromagnetic waves or acoustical waves. While guided elastic waves can propagate over long distances on solid structures, their multi-modal and dispersive characteristics make it difficult to interpret the channel responses and to transfer useful information along pipes. Time reversal is an adaptive transmission method that can improve the spatiotemporal wave focusing. The present disclosure presents the basic principles of a time reversal based pulse position modulation (TR-PPM) method and demonstrates TR-PPM data communication by simulation. The present disclosure also experimentally demonstrates data communication with TR-PPM on pipes. Simulated and experimental results demonstrate that TR-PPM for data communications can be achieved successfully using guided elastic waves.
Owner:UNIV OF MARYLAND EASTERN SHORE +1
System for diagnosing and monitoring structural health conditions
InactiveUS20090157358A1Digital computer detailsNuclear monitoringStructural health monitoringA d converter
Systems for diagnosing / monitoring structural health conditions of objects. The system, which monitors structural health conditions by use of a plurality of patch sensors attached to an object, includes at least one bridge box and at least one relay switch array module having a plurality of switches. Each of the patch sensors is adapted to perform at least one of generating a wave upon receipt of an actuator signal and developing a sensor signal. The bridge box includes an analogue-to-digital converter (ADC) for converting the sensor signal to a digital signal. The switches are adapted to establish a channel between a selected one of the patch sensors and the ADC.
Owner:KIM HYEUNG YUN
Health monitoring system for structures of great building and bridge
InactiveCN102147597ARealize unified monitoringRealize functionMeasurement devicesComputer controlStructural health monitoringData acquisition
The invention discloses a health monitoring system for structures of a great building and a bridge, which comprises sensor terminals, a data acquisition and transmission system, a data processing and control system, a structural health data management system and a structural health condition evaluation system, wherein the data acquisition and transmission system is a distributed measurement system; a plurality of data acquisition sub-stations read data from the corresponding sensor terminals and transmit the data to a field monitoring work station; the data acquisition and transmission system is connected with the data processing and control system through a network; the data processing and control system is connected to the structural health data management system; and the structural health data management system is connected and interacted with the structural health condition evaluation system. The health monitoring system provides an on-line, dynamic and real-time monitoring mode, improves an automated level of structural health monitoring and the reliability, security and generality of the system, provides technical basis for implementation of health monitoring by using a life cycle of the building as a guidance, and provides an advanced and efficient technical measure for structure monitoring of civil engineering.
Owner:GUANGZHOU UNIVERSITY
Sensor devices for structural health monitoring
InactiveUS7034660B2Reduce needEasy to compareThermometers using mean/integrated valuesWeather/light/corrosion resistanceStructural health monitoringCurrent sensor
Described herein are wireless interrogation systems and methods that rely on a complementary sensing device and interrogator. The sensing device is disposed to measure a parameter indicative of the health of a structure. A sensor reading from the sensor indicates the level of a parameter being monitored or whether one or more particular physical or chemical events have taken place. Using wireless techniques, the interrogator probes the device to determine its identity and its current sensor reading. This often includes transmission of a wireless signal through portions of the structure. When activated, the device responds with a wireless signal that identifies the device and contains information about the parameter being measured or a particular sensor state corresponding to the parameter. The identity of the device allows it to be distinguished from a number of similar devices. Thus this invention finds particular usefulness in the context of an array of devices that can be probed by a wireless interrogation unit. In one embodiment, the devices are passive and derive power from the interrogation signal.
Owner:YASUMI CAPITAL
Aircraft health monitoring and design for condition
ActiveUS20110245999A1Vehicle testingRegistering/indicating working of vehiclesResidual strengthStructural health monitoring
A system and method for automatically varying the flight envelope of an aircraft based upon the material health of the aircraft and the flight environment is provided. The system includes a plurality of structural health monitoring and load sensors that determine the approximate size and the approximate location of the damage. The system performs residual strength calculations for individual aircraft components to determine the overall aircraft residual strength. The system uses these calculations to determine a maximum flight envelope based on the overall aircraft residual strength, and transmits this information to the flight controller and optionally to the pilot.
Owner:AURORA FLIGHT SCI CORP
Sensor devices for structural health monitoring
InactiveUS20060170535A1Reduce needEasy to compareElectric signal transmission systemsThermometers using mean/integrated valuesStructural health monitoringCurrent sensor
Described herein are wireless interrogation systems and methods that rely on a complementary sensing device and interrogator. The sensing device is disposed to measure a parameter indicative of the health of a structure. A sensor reading from the sensor indicates the level of a parameter being monitored or whether one or more particular physical or chemical events have taken place. Using wireless techniques, the interrogator probes the device to determine its identity and its current sensor reading. This often includes transmission of a wireless signal through portions of the structure. When activated, the device responds with a wireless signal that identifies the device and contains information about the parameter being measured or a particular sensor state corresponding to the parameter. The identity of the device allows it to be distinguished from a number of similar devices. Thus this invention finds particular usefulness in the context of an array of devices that can be probed by a wireless interrogation unit. In one embodiment, the devices are passive and derive power from the interrogation signal.
Owner:YASUMI CAPITAL
Method of manufacturing a structural health monitoring layer
ActiveUS20060154398A1Facilitate monitoring of structural health of structureSemiconductor/solid-state device manufacturingElasticity measurementStructural health monitoringEngineering
Methods of manufacturing a diagnostic layer containing an array of sensing elements. The sensing elements, associated wires, and any accompanying circuit elements, are incorporated various layers of a thin, flexible substrate. This substrate can then be affixed to a structure so that the array of sensing elements can analyze the structure in accordance with structural health monitoring techniques. The substrate can also be designed to be incorporated into the body of the structure itself, such as in the case of composite structures.
Owner:ACELLENT TECH
Sensors and systems for structural health monitoring
InactiveUS20050061076A1Improve reliabilityImprove maintainabilityVibration measurement in solidsAnalysing solids using sonic/ultrasonic/infrasonic wavesElectric forceElectricity
Sensors and systems for monitoring structural health conditions. The present invention provides a device for monitoring structural health conditions including a dielectric substrate, a piezoelectric device for actuating and / or sensing Lamb waves, a molding layer deposited over the piezoelectric device, a cover layer deposited over the molding layer and a hoop layer surrounding the piezoelectric device and being attached to the substrate. The device further includes an optical fiber coil sensor attached to the dielectric substrate, where the coil sensor has a rolled optical fiber cable and a coating layer applied to the rolled optical fiber cable. The present invention also provides a diagnostic patch network that includes a plurality of patch sensors attached to a host structure and a bridge box connected to the patch sensors. The bridge box sends information of structural health conditions to and receive power from a ground control system using a wireless communication technique.
Owner:ADVANCED STRUCTURE MONITORING
Frequency-adaptable structural health and usage monitoring system
ActiveUS20130211737A1Plug gaugesRegistering/indicating working of vehiclesHealth and usage monitoring systemsStructural health monitoring
A structural health monitoring system comprising intelligent sensors, wherein the intelligent sensors are individually programmable and can be tuned to listen to specific frequencies based on a scaling factor based on the sensor's location in the system being monitored, a set of pre-known frequencies based on the sensor's location in the system being monitored, and the output of a central frequency-based system sensor.
Owner:APPAREO SYST
Bolt loosening monitoring method and implementation device thereof
InactiveCN103630282AEasy to monitorSimple structureApparatus for force/torque/work measurementElectricityStructural health monitoring
The invention discloses a bolt loosening monitoring method and an implementation device thereof. According to the method, a bolt loosening situation is determined by monitoring the tension of a screw; if the tension of the screw is lower than a safety threshold value, the bolt is determined to be loosening. A piezoelectric sensing element is arranged between a screw cap and a connected component, and is used for monitoring the change of the tension of the screw in a using process of the bolt, acquiring the feedback response signal under the change, comparing the feedback response signal with a preset safety threshold value, and analyzing to determine the bolt loosening situation; if the tension of the screw is lower than the safety threshold value, the bolt is determined to be loosening, and an early-warning signal is sent out. The bolt loosening monitoring device for implementing the method comprises the piezoelectric sensing element, a data acquisition element, data reading equipment, and a data management analysis and feedback alarm module. By the method and the device, the bolt loosening state can be examined remotely and quickly; the main body of the monitoring device can be detached and replaced; the original structure is little influenced; the method and the device are suitable for large structural bolt monitoring; the manpower and energy resources are saved; the cost and the operating cost are low.
Owner:TONGJI UNIV
Structural health monitoring layer having distributed electronics
A sensor array embedded within a flexible layer. The sensors, which can be transducers, are controlled by local electronics also embedded within the flexible layer. The invention includes numerous different arrangements of these electronic controllers and their associated transducers. For example, each transducer can have its own controller embedded nearby. Alternatively, one controller can control a number of transducers, and can therefore be embedded in various configurations proximate to one or more of the transducers it controls. The controllers can include various components that impart other advantages, such as wireless transceivers for reducing the number of wires needed within the flexible layer, and local processors for reducing or eliminating the need for a remote data processor.
Owner:ACELLENT TECH
Structural monitoring
InactiveUS20080061959A1Accurate directionExtended service lifeVehicle seatsRegistering/indicating working of vehiclesStructural monitoringStructural health monitoring
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.
Owner:INTELLIGENT TECH INT
In-situ structural health monitoring, diagnostics and prognostics system utilizing thin piezoelectric sensors
InactiveUS7024315B2Plug gaugesAnalysing solids using sonic/ultrasonic/infrasonic wavesStructural health monitoringEngineering
A method of detecting a damaged feature within a structure includes embedding a plurality of thin piezoelectric ceramic sensors on the structure. A first sensor is excited so that the first sensor produces a responsive signal in the structure. The responsive signal is received at a second sensor. The presence or absence in the received responsive signal of at least one predetermined signal characteristic is determined, where the predetermined signal characteristic is related to existence of the damage feature.
Owner:SOUTH CAROLINA UNIV OF
Mobilized Sensor Network for Structural Health Monitoring
ActiveUS20130018525A1Material analysis using sonic/ultrasonic/infrasonic wavesDigital data processing detailsStructural health monitoringEngineering
Owner:THE BOEING CO
Structural health monitoring (SHM) transducer assembly and system
InactiveUS20080289426A1Reduce gapPiezoelectric/electrostrictive device manufacture/assemblyMaterial analysis using sonic/ultrasonic/infrasonic wavesElectricityContact pad
A transducer assembly may include a first layer of dielectric material and a pair of electrically conductive traces adjacent to the first dielectric layer. Each of the electrically conductive traces may include a first contact pad and a second contact pad. The first layer of dielectric material may include a pair of vias or openings formed therein to expose each of the first contact pads. A second layer of dielectric material may be attached to the first layer of dielectric material with the pair of electrically conductive traces disposed between the first and second layers of dielectric material. A transducer may be attached to the second layer of dielectric material and each second contact pad may be electrically connected to the transducer.
Owner:THE BOEING CO
Device for monitoring the health status of structures
InactiveUS20100238027A1Fast and safe and easy to testHigh sensitivityPlug gaugesMobile data collection deviceData compressionTelecommunications network
Structural health monitoring device with improved reliability and performances that is applied in selected locations on a structure. The structural health monitoring device includes a data acquisition, process and storage media, a direct and independent wireless connection system to a standard and globally interconnected telecom network, is uninterruptedly powered by a power management system featuring at least two battery power sources. The structural health monitoring device further includes sensors specifically intended to remain permanently active and “asynchronously” trigger data acquisition sessions in occurrence of timely unpredictable phenomena having structural relevance and is moreover comprising data processing media for data compression and for automatic detection of possible structural anomalies using a self-training neural data processing algorithm.
Owner:BASTIANINI FILIPPO
Structure health monitoring system and method
ActiveUS7103507B2Lower cost of ownershipIncreased safety marginVehicle testingPlug gaugesStructural health monitoringTime-Consuming
Owner:HONEYWELL INT INC
Bridge structural health monitoring car
InactiveCN101713167AEasy maintenanceCollection directlyOptically investigating flaws/contaminationBridge structural detailsInformation processingStructural health monitoring
The invention provides a bridge structural health monitoring car. A mechanical hand capable of being bent to extend into the lower part of a bridge is arranged on the bridge structural health monitoring car, wherein at least one camera is arranged on the mechanical hand and used for collecting the image information of the bottom and the side face of the bridge; a high-precision GPS positioning device is arranged and used for determining a current detection position and measuring the line shape of the bridge surface; a bridge structure dynamic information collecting device is arranged and used for collecting the dynamic characteristic information data of the bridge structure; an information processing device is arranged and used for storing the image information collected by the cameras, the GPS data and the dynamic characteristic information data, judging the health conditions and the disease development conditions of the bridge structure according to the analysis and the comparison of the monitoring data of each time and definitely indicating the disease conditions and parts by visual images. The bridge structural health monitoring car can carry out health monitoring on a plurality of bridges at the same time.
Owner:周劲宇 +1
Bridge structural safety monitoring system and method thereof
InactiveUS20110044509A1Reduce labor requirementsAvoid exposureImage enhancementImage analysisCorrelation coefficientStructural health monitoring
The present invention discloses a bridge structural safety monitoring system and a bridge structural safety monitoring method. The method includes the steps of capturing an image of a monitoring area of a bridge to create a standard image of the bridge operated at normal conditions, capturing images of the monitoring area of the bridge continuously to obtain monitoring images, comparing the standard image with the monitoring image to obtain a displacement correlation coefficient of the monitoring area of the bridge, and transmitting the displacement correlation coefficient to a central console, such that the central console can determine the using condition of the bridge according to the displacement correlation coefficient.
Owner:NAT APPLIED RES LAB
Method and system for structural health monitoring
InactiveUS20160371957A1Improves operation of systemImprove operationAircraft health monitoring devicesFluid-tightness measurementMobile vehicleJet aeroplane
A system for monitoring physical and environmental conditions of an object can include one or more sensing devices affixed or mounted to the object. The sensing devices produce sensor data (e.g. motion, vibration, impact, temperature, stress and strain) that can be used to anticipate failure or for operation and / or maintenance purposes. The sensing devices can positioned on structures such as a building or an oil rig, on vehicles such as on airplanes, trains, ships and motor vehicles, and on moving devices such as wind turbines and draw bridges.
Owner:MC 10 INC
Integrated phased array transducer, system and methodology for structural health monitoring of aerospace structures
InactiveUS20120253698A1Easy to analyzeEasy interpretationPiezoelectric/electrostriction/magnetostriction machinesUsing subsonic/sonic/ultrasonic vibration meansAviationContact pad
The invention provides an integrated Phased Array (PhA) structural radar transducer, permanently bonded to a structure, that can provide reliable electromechanical connection with corresponding miniaturized electronic SHM device installed above it. The integrated PhA transducer consists of a set of aligned piezo-electric discs with wrap around electrodes for transceiving of elastic ultrasonic waves, plurality of electrical traces and contact pads, several layers of a flexible printed circuit board, electromagnetic shielding between channels and overall, one electromechanical multi-pinned connector and all that integrated into one small unit easy for surface installation by bonding and final application on real structures. The integrated PhA transducer, as a key component of SHM (Phased Array Monitoring for Enhanced Life Assessment) system, has two principal tasks to reliably transceive elastic waves and serve as a reliable sole carrier or support for associated sophisticated SHM electronic device attached above.
Owner:AERNNOVA ENG SOLUTIONS IBERICA
Structure health monitoring method based on distributed strain dynamic test
InactiveCN101221104AOvercoming only point distributionOvercoming the pitfalls of making \"point\" measurementsFoundation testingStrength propertiesMathematical modelStructural health monitoring
The invention discloses a method for monitoring the structure health based on a distributed strain dynamic test; the invention adopts a distributed strain transducer to build a distributed sensing network and selects to arrange a reference transducer, carries out structure system simulation state analyzing to obtain a distributed strain simulation state vector DMSV, originally takes whether a target characteristic vector Alpha changes or not as a criterion to identify structural damage, obtains the effects of being capable of rapidly, accurately and effectively capturing the structural damage and locating, and simultaneously adopts the reasonable measures of real time image display and deleting redundant data on time, thereby having the advantages of small errors, high precision, simple process and intuitionistic monitoring; the method can eliminate the interference of noise and environment under the conditions of uncertain loading and an unknown mathematical model, carry out on-line structural damage detecting and diagnosing in real time and is suitable for long period monitoring of various engineering structures, especially for the civil structure.
Owner:吴智深 +1
Software to facilitate design, data flow management, data analysis and decision support in structural health monitoring systems
InactiveUS20120123981A1Improve productivityEasy to controlDigital data information retrievalDigital data processing detailsData compressionStructural health monitoring
This patent application describes (a) software to help people design monitoring systems and (b) methods to facilitate enhanced data flow management (including from large numbers of simultaneous sources), diagnostic and statistical analyses based on novel concepts of data compression using statistical state space techniques. The design assistance is structured around known but not widely practiced procedures such as documented in Graves, Rens and Rutz (2011). For data flow management, the present invention may transmit and store an estimated state space model only when the last stored model is not adequate to predict recent observations. It may also transmit and store outliers and samples of regular observations. This unique data storage format requires new methods for data analysis to properly extract the information contained therein.
Owner:GRAVES SPENCER B +2
Ultrasonic vibration system and method for removing/avoiding unwanted build-up on structures
InactiveUS20100031972A1Avoid overall overheatingIncrease coveragePiezoelectric/electrostriction/magnetostriction machinesDe-icing equipmentsStructural health monitoringEngineering
An ultrasonic method for removing and / or avoiding unwanted build-up on structures is provided, wherein the term build-up refers to, but is not limited to, ice, dirt, mud, or other wanted debris or contamination. Deicing or anti-icing structures of interest can include, but are not limited to, helicopter rotor blades, other helicopter blade components, fixed wing aircraft components, windshields in aircraft, automobiles, and other vehicles, ship hulls or other ship components, heat exchangers and other tubing where frost or ice could form, air-conditioning components, head lamp and other light coverings, bridge structures and components, and any structure where anti-icing or deicing would be beneficial. One or more ultrasonic actuators permanently embedded or coupled to the structure may be used accomplish the removal. The technique presented herein could also be utilized for non-destructive evaluation and structural health monitoring applications.
Owner:FUKUOKA BROADCASTING CORPORATION
Device, system, and method for structural health monitoring
A phased array sensor assembly is presented that can be permanently adhered to and impart ultrasonic waves to a structural surface and receive ultrasonic waves from a structural surface. The sensor assembly includes piezo-electric disks, a plurality of electrically conductive epoxy film adhesive contacts positioned such that an electrical coupling is formed with the piezo-electric disks, piezo transducer flex wire trace circuits aligned to be electrically coupled respectively with the electrically conductive epoxy film adhesive contacts on one end and including a plurality of wire trace electrical contact pads on the other end, and a flexible polyimide layer. The polyimide layer includes laser ablated areas for exposing the contact pads such that they can be electrically coupled with an external device.
Owner:THE BOEING CO
Self-processing integrated damage assessment sensor for structural health monitoring
ActiveUS20050114045A1Easy to useAnalysing solids using sonic/ultrasonic/infrasonic wavesSubsonic/sonic/ultrasonic wave measurementStructural health monitoringSelf processing
A small, lightweight, portable, and inexpensive self-processing integrated damage assessment sensor (SPIDAS) that may be temporarily or permanently attached to a structure for structural health monitoring is provided. The SPIDAS device employs an electromechanical impedance measuring method to directly measure the high-frequency local impedance spectrum of the structure, process the electromechanical impedance data, and issue structural health reports that the device may transmit over a wireless connection.
Owner:SOUTH CAROLINA UNIV OF
Method and system for synchronous acquisition of wireless sensor network for structural health monitoring
InactiveCN101778405AHigh time synchronization efficiencyImproving Synchronized Acquisition AccuracySynchronisation arrangementNetwork topologiesStart timeTimestamp
The invention discloses a method and a system for the synchronous acquisition of a wireless sensor network for structural health monitoring. The method comprises the following steps: when a time synchronization packet sent by a gateway is received, adjusting local time by nodes according to sending timestamp and receiving timestamp to complete time synchronization; when the nodes receive pre-synchronous acquisition instructions broadcasted and sent by the gateway and reach the preset start time of the synchronous acquisition, taking the preset start time of the synchronous acquisition as the physical time of the starting of the synchronous acquisition by the gateway, performing zero clearing on the local time by each node to start acquiring data, marking the relative timestamp and the serial number of data packets in the acquired data packet, and sending the data packet to the gateway; and performing flexible optimization on the relative time of each node by the gateway according to relative timestamp and the serial number of the data packets, and adding the relative time to the physical time as synchronous acquisition time information of each data packet. The method can realize time synchronization and the synchronous acquisition in the process of acquisition, ensure that the time of sampling points is accurate, avoid packet loss and ensure the reliability of global diagnosisin the process of the structural health monitoring. The invention simultaneously discloses a system for the synchronous acquisition of the wireless sensor network for the structural health monitoring.
Owner:WUHAN UNIV OF TECH
Method and apparatus for switching among elements of a structural health monitoring system
ActiveUS7395189B2Radiation pyrometryUltrasonic/sonic/infrasonic wave generationStructural health monitoringControl line
Owner:ACELLENT TECH
Methods and systems for automated bridge structural health monitoring
InactiveUS20150198502A1Minimizing human attendanceImproper operationForce measurementWork measurementStructural health monitoringField methods
In-situ methods and systems for determining bridge load ratings under ambient traffic are provided. These may include, for example, by installing one or more strain gauges on one or more bridge girders a batch of strain readings may be acquired from the one or more strain gauges. From the batch of strain readings, one or more strain time histories may be randomly sampled based, for example, on a girder peak strain. One or more vehicles may be randomly selected based on the one or more stored vehicle parameters by accessing a database with one or more stored vehicles and stored vehicle parameters. A bridge load rating model may be calibrated based on the one or more randomly sampled strain time histories and the randomly selected one or more vehicles for acquiring, in one embodiment, a bridge load rating distribution.
Owner:IOWA STATE UNIV RES FOUND
Predictive peer-based tire health monitoring
ActiveUS20140277910A1Reduce varianceAnomaly detectionVehicle testingRegistering/indicating working of vehiclesStructural health monitoringEngineering
A method, apparatus and program product determine a health condition for the tires on one or more vehicles by performing an individual self-comparison and a peer-based comparison for each tire, where the individual self-comparison reduces variances between the plurality of tires on the vehicle, and the peer-based comparison reduces variances within each tire. Anomalies, such as severe leakage and tire inflations may be detected, and slow leakages may be predicted based upon historical data associated with the health condition.
Owner:THE GOODYEAR TIRE & RUBBER CO
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