Explanipedia

Cold Spray Additive Manufacturing For New Pipeline Fabrication In Live, Natural Gas Distribution Mains Open

A. H. Shah, Baiyang Ren · 2022

ULC Technologies (ULC) and the Penn State University Applied Research Lab (PSU ARL) developed a process and approach for rehabilitating live, natural gas distribution pipelines using Cold Spray Additive Manufacturing (CSAM). Robotic inline…

EMAT Guided Wave Technology for Inline Inspections of Unpiggable Natural Gas Pipelines Open

Baiyang Ren, Junjun Xin, A. H. Shah, Ulc Robotics · 2018

The CIRRIS XI robot has made great strides in overcoming major challenges associated with internal assessment of cast iron pipelines. Most importantly the CIRRIS XI robot can measure wall thickness and stress and detect defects while provi…

Using PVDF for wavenumber-frequency analysis and excitation of guided waves Open

Baiyang Ren, Hwanjeong Cho, Cliff J. Lissenden · 2018

The role of transducers in nondestructive evaluation using ultrasonic guided waves cannot be overstated. Energy conversion from electrical to mechanical for actuation and then back to electrical for signal processing broadly describes tran…

In-line inspection of unpiggable buried live gas pipes using circumferential EMAT guided waves Open

Baiyang Ren, Junjun Xin · 2018

Unpiggable buried gas pipes need to be inspected to ensure their structural integrity and safe operation. The CIRRIS XITM robot, developed and operated by ULC Robotics, conducts in-line nondestructive inspection of live gas pipes. With the…

A Guided Wave Sensor Enabling Simultaneous Wavenumber-Frequency Analysis for Both Lamb and Shear-Horizontal Waves Open

Baiyang Ren, Hwanjeong Cho, Cliff J. Lissenden · 2017

Guided waves in plate-like structures have been widely investigated for structural health monitoring. Lamb waves and shear horizontal (SH) waves, two commonly used types of waves in plates, provide different benefits for the detection of v…

Quantitative verification of thin-film polyvinylidene fluoride (PVDF) transducer array performance up to 60 °C Open

Christopher Hakoda, Baiyang Ren, Cliff J. Lissenden, Joseph L. Rose · 2017

Thin-film PVDF (polyvinylidene fluoride) transducers are appealing as low cost, light weight, durable, and flexible sensors for structural health monitoring applications in aircraft structures. However, due to the relatively low Curie temp…

A fully coupled model for actuation of higher order modes of Lamb waves Open

Baiyang Ren, Cliff J. Lissenden · 2017

Lamb waves have proven to be a valuable tool for structural health monitoring (SHM) of plate-like structures susceptible to degradation and failure. It is well-known that their multi-modal propagation characteristic could be both a challen…

PVDF array sensor for Lamb wave reception: Aircraft structural health monitoring Open

Baiyang Ren, Cliff J. Lissenden · 2016

Fracture critical structures need structural health monitoring (SHM) to improve safety and reliability as well as reduce downtime and maintenance costs. Lamb waves provide promising techniques for on-line SHM systems because of their large…

Quantitative Verification of Thin-Film PVDF Transducer Array Performance up to 60 °C Open

Christopher Hakoda, Baiyang Ren, Cliff J. Lissenden, Joseph L. Rose · 2016

Thin-film PVDF (polyvinylidene fluoride) transducers are appealing as light weight, durable, and flexible sensors for structural health monitoring applications in aircraft structures. However, due to the relatively low Curie temperature of…

Guided wave mode selection for inhomogeneous elastic waveguides using frequency domain finite element approach Open

Vamshi Krishna Chillara, Baiyang Ren, Cliff J. Lissenden · 2015

Reusable acoustic tweezers for disposable devices Open

Feng Guo, Yuliang Xie, Sixing Li, James P. Lata, Liqiang Ren , et al. · 2015

Reusable acoustic tweezers used for disposable devices are demonstrated using locally transmitted standing surface acoustic waves.

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