201 |
METHOD OF ESTIMATING LOAD CARRYING CAPACITY OF BRIDGE |
US12902928 |
2010-10-12 |
US20120089378A1 |
2012-04-12 |
Chang-Geun Lee; Won-Tae Lee |
Provided is a method of estimating a load carrying capacity of a bridge. The load carrying capacity estimation method includes the steps of: estimating a mode coefficient of the bridge using an acceleration signal obtained from an accelerometer that is installed in the bridge; updating an analysis model of the bridge using the estimated mode coefficient; and estimating a rating factor of the bridge by applying a dead load and a design live load to the updated analysis model. |
202 |
SELF-POWERED RFID SENSING SYSTEM FOR STRUCTURAL HEALTH MONITORING |
US13203464 |
2009-02-25 |
US20120068827A1 |
2012-03-22 |
Jia Yi; Nicolas A. Gay; Qiuyun Fu; Bernd Frankenstein; Wolf-Joachim Fischer; Norbert Meyendorf |
An RFID-based sensing system includes a piezoelectric arrangement mountable at least partially on a structure, an RFID transponder connected to the piezoelectric arrangement, and an antenna connected to the RFID transponder and/or being integrated into the RFID transponder. The piezoelectric arrangement and/or the RFID transponder are adapted to convert kinetic energy provided by the structure into electrical energy usable for powering the RFID transponder and to generate sensing information with respect to a state of the structure. The RFID-based sensing system also includes an RFID reader. |
203 |
TRIGGER CIRCUIT FOR LOW-POWER STRUCTURAL HEALTH MONITORING SYSTEM |
US12844735 |
2010-07-27 |
US20120029842A1 |
2012-02-02 |
Chang ZHANG |
A trigger circuit for use with a structural health monitoring system. To save power, a structural health monitoring system is programmed with a sleep mode and a wake, or operational, mode. In its operational mode, the structural health monitoring system can perform its usual tasks, e.g. monitoring a structure and determining its structural health. In sleep mode, many functions are suspended, so that the system requires less power. The trigger circuit wakes the system when the sensors of the structural health monitoring system emit a sufficiently large signal, i.e. when an event occurs. That is, when not in use, the system enters sleep mode, and when some event occurs (e.g., impact, or some other stresses that are of concern), the trigger circuit alerts the system, prompting it to shift from sleep mode to operational mode and to begin taking/analyzing data. |
204 |
Remote optical fiber surveillance system and method |
US12344979 |
2008-12-29 |
US08073294B2 |
2011-12-06 |
John Sinclair Huffman; Gerald Frank Laszakovits; James Kirkpatrick |
In accordance with one aspect of the disclosed technology, wireless communications are used in a fiber surveillance system to enable monitoring of remote locations for vibrations, acoustic signals, stresses, stress fatigue or other detectable characteristics. A fiber that is deployed in the structure or region being monitored is connected a wireless transmitter that is used to transmit, to a receiving system, return optical signals obtained with the surveillance system. The return signals can be transmitted in raw form or after partial or total analysis. |
205 |
Sensor network incorporating stretchable silicon |
US12389196 |
2009-02-19 |
US07948147B2 |
2011-05-24 |
Michael Alexander Carralero; John Lyle Vian |
A sensor network is described which includes a stretchable silicon substrate, and a plurality of nodes fabricated on the stretchable silicon substrate. The nodes include at least one of an energy harvesting and storage element, a communication device, a sensing device, and a processor. The nodes are interconnected via interconnecting conductors formed in the substrate. |
206 |
Optical Fiber Structure Monitoring and Analysis |
US12568757 |
2009-09-29 |
US20110075964A1 |
2011-03-31 |
John Sinclair Huffman |
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. |
207 |
SYSTEM AND PROCEDURE FOR THE REAL-TIME MONITORING OF FIXED OR MOBILE RIGID STRUCTURES SUCH AS BUILDING STRUCTURES, AIRCRAFT, SHIPS AND/OR THE LIKE |
US12936051 |
2008-04-01 |
US20110029276A1 |
2011-02-03 |
Miguel Luis Cabral Martin |
This invention relates to a system and a procedure for the carrying out of the ongoing monitoring in time of the distortions in a stationary or moving structure, due to the various effects acting thereupon, such as frictional forces, forces produced by loads, resistance forces, etc. The disturbances exerted on a structure may cause distortions, which may be calculated by using the warp and twist angles. When the disturbance acts on the structure for a period of time, these measured values may be used by a processor integrated in the system which, by means of mathematical analysis, will determine the necessary parameters, such as resistance, fatigue, acceleration, elastic potential energy, direction of the forces, speed, elasticity, etc., in order to determine the state of the structure and to establish its useful life span. The system and procedure are comprised of a plurality of inclinometers (2), at least one gyroscope (3) and a plurality of accelerometers (4), uniformly or otherwise distributed throughout the structure to be monitored. This allows the structure to be divided into sections, and all the information reflected by these measurements is transmitted to a processor (5). |
208 |
Component RFID Tag with Non-Volatile Display of Component Use |
US12782597 |
2010-05-18 |
US20100315248A1 |
2010-12-16 |
Christopher P. Townsend; Jacob Henry Galbreath; Steven Willard Arms |
A system includes a component, an electronic circuit, and a display. The electronic circuit and the display are on the component. The electronic circuit is connected to receive data related to use of the component. The electronic circuit is connected to the display for providing a time parameter related to at least one from the group consisting of remaining life of the component and life expended by the component. The time parameter is for displaying on the display. |
209 |
LOAD MONITOR RELIABILITY FACTOR USING AN ADVANCED FATIGUE RELIABILITY ASSESSMENT MODEL |
US12724730 |
2010-03-16 |
US20100235109A1 |
2010-09-16 |
Jack Z. Zhao; David O. Adams |
According to one non-limiting embodiment, a method includes accessing distributions of flight loads associated with one or more flight regimes for a fleet of aircraft. Using the distributions of flight loads, a factor for at least one of the flight regimes is determined that provides a flight load adjustment for a component on each aircraft of a fleet of aircraft known to be affected through at least load damage by the at least one flight regime. |
210 |
Self-powered sensor |
US12273844 |
2008-11-19 |
US07757565B2 |
2010-07-20 |
Shantanu Chakrabartty |
A self-powered sensor is provided for strain-rate monitoring and other low power requirement applications. The self-powered sensor is comprised of: a piezoelectric transducer; a non-volatile memory comprised of at least one floating gate transistor; a current reference circuit adapted to receive a voltage signal from the piezoelectric transducer and operable to output a reference current into the non-volatile memory; an impact-monitoring circuit having a triggering circuit and a switch; the triggering circuit adapted to receive the voltage signal from the piezoelectric transducer and operable to control the switch based on the rate of change of the voltage signal. |
211 |
Remote Optical Fiber Surveillance System and Method |
US12344979 |
2008-12-29 |
US20100166357A1 |
2010-07-01 |
John Sinclair Huffman; Gerald Frank Laszakovits; James Kirkpatrick |
In accordance with one aspect of the disclosed technology, wireless communications are used in a fiber surveillance system to enable monitoring of remote locations for vibrations, acoustic signals, stresses, stress fatigue or other detectable characteristics. A fiber that is deployed in the structure or region being monitored is connected a wireless transmitter that is used to transmit, to a receiving system, return optical signals obtained with the surveillance system. The return signals can be transmitted in raw form or after partial or total analysis. |
212 |
Structural health monitoring (SHM) transducer assembly and system |
US11754167 |
2007-05-25 |
US07743659B2 |
2010-06-29 |
Justin D. Kearns; David M. Anderson |
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. |
213 |
Power Aware Techniques For Energy Harvesting Remote Sensor System |
US12331908 |
2008-12-10 |
US20100141377A1 |
2010-06-10 |
Emad Andarawis; Ertugrul Berkcan; C. Scott Sealing; Robert Wojnarowski; Eladio Delgado; Richard H. Coulter |
A distributed monitoring system for a structure. |
214 |
Systems and methods for monitoring energy system components |
US11750025 |
2007-05-17 |
US07715991B2 |
2010-05-11 |
Yogesh Kesrinath Potdar; David Ernest Welch; David Wing Chau |
A method for estimating an amount of damages sustained by a component operating in an energy system by monitoring the component is provided. The method includes generating a transfer function that is dependent upon an input of at least one operating condition of the component and an output of a crack-initiation time and/or a crack propagation for at least one critical region. The method further includes receiving data from at least one sensor coupled to the component, wherein the data relates to the at least one operating condition of the component, and inputting the received data from the at least one sensor into the transfer function to calculate at least one of the crack-initiation time and the crack propagation for the at least one critical region. The method also includes recording at least one of the crack-initiation time and the crack propagation on a memory storage device. |
215 |
MAGNETOSTRICTIVE MEASUREMENT OF TENSILE STRESS IN FOUNDATIONS |
US11964196 |
2007-12-26 |
US20090169380A1 |
2009-07-02 |
Jacob Johannes Nies; Jan Erich Hemmelmann; Christof Martin Sihler |
A foundation for supporting a structure is provided. The foundation includes a foundation body, at least one anchor bolt connecting a lower anchor plate and the structure, a magnetostrictive load measuring sensor for measuring loads on the at least one anchor bolt, the magnetostrictive load measuring sensor being positioned within the foundation body. |
216 |
SELF-POWERED SENSOR |
US12273844 |
2008-11-19 |
US20090120200A1 |
2009-05-14 |
Shantanu Chakrabartty |
A self-powered sensor is provided for strain-rate monitoring and other low power requirement applications. The self-powered sensor is comprised of: a piezoelectric transducer; a non-volatile memory comprised of at least one floating gate transistor; a current reference circuit adapted to receive a voltage signal from the piezoelectric transducer and operable to output a reference current into the non-volatile memory; an impact-monitoring circuit having a triggering circuit and a switch; the triggering circuit adapted to receive the voltage signal from the piezoelectric transducer and operable to control the switch based on the rate of change of the voltage signal. |
217 |
Method and apparatus for monitoring the integrity of components and structures |
US11260882 |
2005-10-27 |
US07500383B2 |
2009-03-10 |
Kenneth John Davey |
A method for monitoring the integrity of a permeable structure that is disposed in an environment containing a fluid at ambient pressure is provided. At least one cavity is formed in or on the permeable structure. A source of first fluid is provided at a first pressure greater than the ambient pressure. The cavity is coupled to the source through a high-fluid-flow impedance to establish a flow of the first fluid through the permeable structure via the cavity. A rate of flow of the first fluid through the permeable structure is allowed to stabilize to a steady-state rate. A change in the steady-state flow rate of the first fluid through the permeable structure is monitored. |
218 |
SYSTEMS AND METHODS FOR MONITORING ENERGY SYSTEM COMPONENTS |
US11750025 |
2007-05-17 |
US20080288183A1 |
2008-11-20 |
Yogesh Kesrinath Potdar; David Ernest Welch; David Wing Chau |
A method for estimating an amount of damage sustained by a component operating in an energy system includes generating a transfer function that is dependent upon at least one operating condition of the component, receiving data from at least one sensor coupled to the component, wherein the data relates to the at least one operating condition of the component, inputting the received data into the transfer function to calculate at least one of a crack-initiation time and a crack propagation for the at least one critical region, and recording at least one of the crack-initiation time and the crack propagation on a memory storage device. |
219 |
Systems and methods for measuring a parameter of a landfill including a barrier cap and wireless sensor systems and methods |
US10974917 |
2004-10-26 |
US07187299B2 |
2007-03-06 |
Dennis C. Kunerth; John M. Svoboda; James T. Johnson |
A method of measuring a parameter of a landfill including a cap, without passing wires through the cap, includes burying a sensor apparatus in the landfill prior to closing the landfill with the cap; providing a reader capable of communicating with the sensor apparatus via radio frequency (RF); placing an antenna above the barrier, spaced apart from the sensor apparatus; coupling the antenna to the reader either before or after placing the antenna above the barrier; providing power to the sensor apparatus, via the antenna, by generating a field using the reader; accumulating and storing power in the sensor apparatus; sensing a parameter of the landfill using the sensor apparatus while using power; and transmitting the sensed parameter to the reader via a wireless response signal. A system for measuring a parameter of a landfill is also provided. |
220 |
Method for satisfying certification requirements and verifying the integrity of structural health management systems |
US11142038 |
2005-05-31 |
US20060282297A1 |
2006-12-14 |
Grant Gordon; Nicholas Wilt; Joseph Nutaro |
A method for verifying the integrity of a structural health management system comprising a plurality of sensors mounted on a structure, a baseline data set for each of the plurality of sensors and a calibration procedure that uses the structure itself as part of the reference standard is disclosed. Initially a baseline data set, including time-of-flight between each of the plurality of sensors and neighboring sensor selected from the plurality of sensors, is established. Before performing the structural health assessment a calibration-in data set for each of the plurality of sensors is collected. The calibration-in data set is compared to the baseline data set for each sensor of the plurality of sensors. If the calibration-in data set and the baseline data set match then a structure characterization is performed. If the calibration-in data set and the baseline data set do not match, an approach to resolving the ambiguity between inoperable sensors versus structural failure is disclosed. After resolution of any ambiguity and performing the structural damage detection, a calibration-out procedure is performed to generate a calibration-out data set. It is then determined that the structural health management system was working during the damage estimation interval if the calibration-out data set and the calibration-in data sets match. |