Prof. Kerop D. Janoyan Profile

Prof. Kerop D. Janoyan

SDL Author at Clarkson Univ

SPIE Involvement:

Author

Publications (16)

Proceedings Article | 15 April 2011 Paper

Effect of sensor placement on operational modal analysis of steel girder bridges

Matthew Whelan, Michael Gangone, Kerop Janoyan

Proceedings Volume 7982, 79820L (2011) https://doi.org/10.1117/12.880527

KEYWORDS: Sensors, Bridges, Modal analysis, Finite element methods, Structural health monitoring, Sensor networks, Fourier transforms, System identification, Digital filtering, Environmental monitoring

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Proceedings Article | 15 April 2011 Paper

Condition assessment of a bridge superstructure using diagnostic performance indicators

Michael Gangone, Matthew Whelan, Kerop Janoyan

Proceedings Volume 7982, 79820G (2011) https://doi.org/10.1117/12.880564

KEYWORDS: Bridges, Inspection, Diagnostics, Sensors, Transducers, Composites, Wheatstone bridges, Structural health monitoring, Diagnostic tests, Fourier transforms

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Proceedings Article | 7 April 2009 Paper

Wireless sensing system for bridge condition assessment and health monitoring

Michael Gangone, Matthew Whelan, Kerop Janoyan

Proceedings Volume 7293, 72930M (2009) https://doi.org/10.1117/12.815835

KEYWORDS: Bridges, Sensors, Transducers, Inspection, Damage detection, Composites, Sensing systems, Diagnostics, Optical inspection, Structural health monitoring

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Proceedings Article | 7 April 2008 Paper

Integrated monitoring of wind plant systems

Matthew Whelan, Kerop Janoyan, Tong Qiu

Proceedings Volume 6933, 69330F (2008) https://doi.org/10.1117/12.776753

KEYWORDS: Wind energy, Sensor networks, Sensors, Sensor technology, Aerodynamics, Energy efficiency, Mechanics, Humidity, System integration, Wind turbine technology

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Proceedings Article | 7 April 2008 Paper

Wireless vibration monitoring for damage detection of highway bridges

Matthew Whelan, Michael Gangone, Kerop Janoyan, Ratneshwar Jha

Proceedings Volume 6933, 69330J (2008) https://doi.org/10.1117/12.776606

KEYWORDS: Bridges, Sensors, Sensor networks, Damage detection, Analog electronics, Digital filtering, Cements, Linear filtering, Instrument modeling, System identification

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Proceedings Article | 7 April 2008 Paper

Field deployment of a dense wireless sensor network for condition assessment of a bridge superstructure

Michael Gangone, Matthew Whelan, Kerop Janoyan, Ratneshwar Jha

Proceedings Volume 6933, 69330L (2008) https://doi.org/10.1117/12.776604

KEYWORDS: Bridges, Sensors, Inspection, Transducers, Sensor networks, Optical inspection, Safety, Structural health monitoring, Visualization, Diagnostics

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Proceedings Article | 10 April 2007 Paper

Real-time wireless sensing with spatiotemporal tracking

Matthew Whelan, Kerop Janoyan

Proceedings Volume 6530, 65300S (2007) https://doi.org/10.1117/12.715910

KEYWORDS: Sensors, Gyroscopes, Sensing systems, Microelectromechanical systems, Sensor networks, Prototyping, Analog electronics, Transceivers, Linear algebra, Velocity measurements

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This study proposes the use of an innovative array of accelerometers for inertial tracking that is enabled through the use of a non-Cartesian hyper-coordinate frame. Traditional inertial tracking technologies employ an array of accelerometers and gyroscopes oriented in the orthogonal axes of the Cartesian coordinate system. The gyroscope sensors are responsible for deducing the relative orientation of the instrumented object, while the accelerometer measurements are double integrated to approximate the change in linear position relative to the local coordinate frame. Since the position determination is dependent on the orientation derivation, the accuracy and stability of the gyroscope sensors to a large extent determines the overall system performance. Consequently, high-performance gyroscopes are generally used in inertial tracking systems, thereby driving the system cost significantly higher. The proposed approach exclusively utilizes accelerometers in an innovative six axis orientation that, through linear algebra, resolves linear and angular accelerations. The functional layout is processed in the context of hyperdimensional coordinates which ultimately produce an inherent vector redundancy when resolved in the Cartesian coordinate frame. This revised architecture is anticipated to alleviate many of the issues plaguing traditional inertial tracking that stem from the stability of derived orientation from gyroscope readings. In addition, the exclusion of gyroscopes from the design significantly reduces the unit cost of the system. This paper additionally presents the development of a wireless system that incorporates the above described, unique array of dedicated sensors for inertial tracking to provide accurate determination of position and orientation of the sensor over time. The system permits access for additional channels of sensors for application specific monitoring tasks. This allows sensing on objects in motion and in regions or flow patterns that cannot be easily instrumented with traditional wired systems while maintaining knowledge of instantaneous position relative to the initial location. To date, the majority of wireless sensor network deployments have enabled instrumentation of widespread sites, such as civil structures, to alleviate the expense associated with the lengths of cable necessary to connect the sensors to a central acquisition station. The alternative approach sought utilizes the unrestrained nature of the wireless sensor to extend the use of this technology beyond static monitoring into applications in which the sensor node travels across an area without a priori knowledge of the sensor motion. Documentation of the hardware development of the proposed wireless sensing node as well as assessment of the system performance will be provided.

Proceedings Article | 10 April 2007 Paper

Development of a wireless bridge monitoring system for condition assessment using hybrid techniques

Matthew Whelan, Michael Fuchs, Michael Gangone, Kerop Janoyan

Proceedings Volume 6530, 65300H (2007) https://doi.org/10.1117/12.715905

KEYWORDS: Sensors, Bridges, Transceivers, Sensor networks, Digital filtering, Structural health monitoring, Transducers, Microcontrollers, Data communications, Analog electronics

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The introduction and development of wireless sensor network technology has resulted in rapid growth within the field of structural health monitoring (SHM), as the dramatic cable costs associated with instrumentation of large civil structures is potentially alleviated. Traditionally, condition assessment of bridge structures is accomplished through the use of either vibration measurements or strain sensing. One approach is through quantifying dynamic characteristics and mode shapes developed through the use of relatively dense arrays of accelerometers. Another widely utilized method of condition assessment is bridge load rating, which is enabled through the use of strain sensors. The Wireless Sensor Solution (WSS) developed specifically for diagnostic bridge monitoring provides a hybrid system that interfaces with both accelerometers and strain sensors to facilitate vibration-based bridge evaluation as well as load rating and static analysis on a universal platform. This paper presents the development and testing of a wireless bridge monitoring system designed within the Laboratory for Intelligent Infrastructure and Transportation Technologies (LIITT) at Clarkson University. The system interfaces with low-cost MEMS accelerometers using custom signal conditioning for amplification and filtering tailored to the spectrum of typical bridge vibrations, specifically from ambient excitation. Additionally, a signal conditioning and high resolution ADC interface is provided for strain gauge sensors. To permit compensation for the influence of temperature, thermistor-based temperature sensing is also enabled. In addition to the hardware description, this paper presents features of the software applications and host interface developed for flexible, user-friendly in-network control of and acquisition from the sensor nodes. The architecture of the software radio protocol is also discussed along with results of field deployments including relatively large-scale networks and throughput rates sufficient for bridge monitoring.

Proceedings Article | 10 April 2007 Paper

Performance monitoring of a short-span integral-abutment bridge using wireless sensor technology

Michael Gangone, Matthew Whelan, Michael Fuchs, Kerop Janoyan

Proceedings Volume 6530, 65300R (2007) https://doi.org/10.1117/12.715909

KEYWORDS: Bridges, Sensors, Transducers, Finite element methods, Fourier transforms, Sensor technology, Environmental monitoring, Environmental sensing, Structural monitoring, Data modeling

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Proceedings Article | 5 April 2006 Paper

Experimental evaluation of instantaneous phase based index for structural health monitoring

Ratneshwar Jha, Kevin Cross, Kerop Janoyan, Edward Sazonov, Michael Fuchs, Vidya Krishnamurthy

Proceedings Volume 6173, 61731D (2006) https://doi.org/10.1117/12.658730

KEYWORDS: Sensors, Structural health monitoring, Error analysis, Interference (communication), Damage detection, Fourier transforms, Vibrometry, Analytical research, Signal processing, Bridges

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Proceedings Article | 5 April 2006 Paper

Environmental testing of wireless sensor system for structural health monitoring of civil infrastructure

Michael Fuchs, Kerop Janoyan, Edward Sazonov, Vidya Krishnamurthy, Ratan Jha, Kevin Cross

Proceedings Volume 6174, 617405 (2006) https://doi.org/10.1117/12.658968

KEYWORDS: Sensors, Temperature metrology, Structural health monitoring, Environmental sensing, Sensor networks, Switches, Environmental monitoring, Damage detection, Microelectromechanical systems, Synthetic aperture radar

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Proceedings Article | 30 March 2006 Paper

Wireless accelerometer network for process monitoring during mold forming in lost foam casting

Matthew Whelan, Kerop Janoyan

Proceedings Volume 6167, 61670Z (2006) https://doi.org/10.1117/12.658680

KEYWORDS: Foam, Sensors, Fourier transforms, Linear filtering, Transceivers, Sensor networks, Metals, Analog electronics, Materials processing, Microelectromechanical systems

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Proceedings Article | 15 March 2006 Paper

Wireless intelligent sensor and actuator network (WISAN): a scalable ultra-low-power platform for structural health monitoring

Edward Sazonov, Ratneshwar Jha, Kerop Janoyan, Vidya Krishnamurthy, Michael Fuchs, Kevin Cross

Proceedings Volume 6177, 61770S (2006) https://doi.org/10.1117/12.658864

KEYWORDS: Sensors, Structural health monitoring, Data acquisition, Sensor networks, Actuators, Bridges, Microcontrollers, Intelligent sensors, Temperature metrology, Data storage

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Proceedings Article | 5 May 2005 Paper

Development and optimization of novel sensors for inline measurement of sand filling and compaction stages in lost foam casting

Matthew Whelan, Kerop Janoyan

Proceedings Volume 5762, (2005) https://doi.org/10.1117/12.600151

KEYWORDS: Foam, Sensors, Transducers, Capacitance, Interfaces, Distortion, Metals, Process control, Signal processing, Capacitors

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Proceedings Article | 29 July 2004 Paper

Advanced inline measurement and control tools for sand filling and compaction in lost foam casting

Matthew Whelan, Kerop Janoyan

Proceedings Volume 5388, (2004) https://doi.org/10.1117/12.539581

KEYWORDS: Foam, Distortion, Sensors, Particles, Metals, Fiber optics sensors, Anisotropy, Convection, Process modeling, Soil science

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Proceedings Article | 27 July 2004 Paper

Wireless intelligent sensor network for autonomous structural health monitoring

Edward Sazonov, Kerop Janoyan, Ratan Jha

Proceedings Volume 5384, (2004) https://doi.org/10.1117/12.540048

KEYWORDS: Structural health monitoring, Sensors, Sensor networks, Bridges, Wind energy, Intelligent sensors, Data acquisition, Head, Damage detection, Actuators

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