CENTER FOR NON DESTRUCTIVE EVALUATION

CNDE

PATENTS

Title Inventors Priority Date Country Reference
In-situ, Non-invasive, Real-time Viscosity Measurement of Molten Material with Laser Ultrasonics J. P. Singh, K. Balasubramaniam, V. V. Shah, D. Costley, and C. Winstead. 01-01-1994 USA 5,686,661(1997)
Viscosity and Temperature Measurements at Very High Temperature by Ultrasound Reflection K. Balasubramaniam, V. V. Shah, D. Costley, and J. P. Singh 18-06-1996 USA 6, 296, 385 (2001)
Tone Burst Eddy Current Thermography (TBET) K. Balasubramaniam, Ch Kiran Kumar, C.V. Krishnamurthy 20.7.2007 India 1568/CHE/2007
Higher Order Modes Clusters Guided Wave Technique K. Balasubramaniam, J. Chandrashekar,C.V. Krishnamurthy 20.7.2007 India 1569/CHE/2007
Automatic Defect Recognition of Realtime Radiography of Hancock Valve Welds R.J. Pardikar, V. Deepesh, K. Balasubramaniam, S. Chakravarthy, Ramanathan 23-12-2008 India No.2207/KOL/2008
Technique for Imaging using Virtual Array of Phased Sources (TIVAS) K. Balasubramaniam, S. Alavudeen, C.V. Krishnamurthy 16-07-2010 India, US 214/CHE/2010 PCT/IN2011/000058 US 9261486
Automated Defect Recognition for Real-Time Radioscopy of Straight Tube Butt Welds R. J. Pardikar, V. Deepesh, K. Balasubramaniam, S. Chakravarthy, Sricharan C. Karthik 14-09-2011 India 1208/KOL/2011
Graphene Functionalized Carbon Nanotube Polymer Composites and Methods for their Preparation and Use S. Ramaprabhu, V. Eashwariah, JASS Jyothisree K.Balasubramaniam 01-01-2012 India, US 2468/CHE/2012 US9944774
Novel Segmented Strip Design For a Magnetostriction Sensor (MsS) Using Amorphous Material For Long Range Inspection of Defects and Bends in Pipes at High Temperatures. Tarun Mishra and Krishnan Balasubramaniam 29.04.2013 India, PCT, US 1897/CHE/2013PCT/IN2014/000229 US10073065B2
A Novel Waveguide Technique for the Simultaneous Measurement of Temperature Dependent Properties of Materials Suresh Periyannan and Krishnan Balasubramaniam 16.07.2013 India, PCT, US 3170/CHE/2013PCT/IN2014/00467 S10794870
Condensed sparse single transmitter multiple receivers (STMR) array based structural health monitoring for large plate-like structures using ultrasonic guided waves Mithunraj KK Johnston B. Lakra, Prabhu Rajagopal and Krishnan Balasubramaniam 18.10.2013 India 4715/CHE/2013
Non-destructive Evaluation Employing Mode-confined Uni-dimensional Guided Waves ? System, Apparatus and Method Therefor Krishnan Balasubramaniam, Prabhu Rajagopal, M. Prabhakaran 23.7.2014 India 3600/CHEF/2014
A Novel Ultrasonic Waveguide Technique for Distributed Sensing and Measurements of Physical and Chemical Properties of Surrounding Media. Krishnan Balasubramaniam and Suresh Periyannan 10-04-2015 India, US, CT 1IN1887/CHE/2015 WO/2016/162880 US20200217726 US 0,520,370 Date 31.12.2019 US 11,022,502 Date 01.06.2021
A novel combinational mask based grating methodology to employ nonlinear wave mixing using Laser ultrasonics. Chaitanya Bakre, Prabhu Rajagopal, Krishnan Balasubramaniam 15-07-2016 India 201841020723
Selectively Exposed Embedded Acoustic Waveguide sensors for Guided wave based online monitoring of Rheology Changes and Damage / Defect ?thereof." Harsh Shah, Prabhu Rajagopal, Krishnan Balasubramaniam 15-07-2016 India 201641024214
Design of a remotely operated crawler for submerged metal and tank floor inspection N.T. Saikiran, S.Agarwal, T. Jhunjhunwala, K. Balasubramaniam and P. Rajagopal 18-07-2016 India
Guided wave mode selected ultrasonic transducers for leave -in-place? high temperature bulk-nondestructive evaluation, based on magnetostrictive amorphous metallic strip A.J. Ashish, K. Balasubramaniam and P. Rajagopal, 20-07-2016 India 201641024212
Rayleigh wave Positioning System(RaPS) K. Balasubramanian 24-07-2017 India, PCT, USA 201741026219 16/628,781
A spherical robot for internal inspection and survey of fluid filled pipelines using visual and acoustic sensors Ajay Raj, Prabhu Rajagopal, K. Balasubramaniam, Avinash Kumar 08-12-2017 India, PCT, Nigeria 201741044125/437412
Integrated Slit Mask for In-situ Laser Ultrasonic Inspection of Additively Manufactured Components Geo Davis, P. Rajagopal, K. Balasubramaniam 02-06-2018 India 201841020723