公开(公告)号：US20210022656A1

公开(公告)日：2021-01-28

申请号：US16934553

申请日：2020-07-21

Applicant: Tata Consultancy Services Limited

Inventor： Anwesha KHASNOBISH ,  Arijit CHOWDHURY ,  Tanushree BANERJEE ,  Debatri CHATTERJEE

IPC: A61B5/16 ,  A61B5/08 ,  A61B5/00 ,  G16H50/30

Abstract: Recognizing mental states from physiological signal is a concern not only for medical diagnostics, but also for cognitive science, behavioral studies as well as brain machine interfaces. Embodiments of the present disclosure utilize respiration signals to decipher mental states wherein non-linear baseline drifts in signal is implemented to extract the respiratory features in most effective way. Presence of class imbalance, is effectively rectified using Synthetic Minority Oversampling Technique (SMOTE) to resolve class imbalance problem, which not only increased the classification accuracy, but also reduced classifier bias towards the majority class, which in turn exceedingly enhanced the classifier sensitivity.

公开(公告)号：US20210401296A1

公开(公告)日：2021-12-30

申请号：US17156395

申请日：2021-01-22

Applicant: Tata Consultancy Services Limited

Inventor： Arijit CHOWDHURY ,  Smriti RANI ,  Anwesha KHASNOBISH ,  Taniya DAS ,  Tapas CHAKRAVARTY ,  Arpan PAL

IPC: A61B5/0205 ,  A61B5/00 ,  A61B5/05

Abstract: The disclosure herein generally relates to the field of determination of cardiopulmonary signals for multi-persons, and, more particularly, to determination of cardiopulmonary signals for multi-persons using in-body signals obtained by ultra-wide band (UWB) radar. The disclosed method determines of cardiopulmonary signals for multi-persons using in-body signals, wherein a UWB radar signals/waves reflected from inside a human body is utilized for efficient determination of cardiopulmonary signals. The disclosed method and system utilize the UWB radar signals to identify a number of persons along with several details about the persons that include a girth of the each identified person and the orientation of the identified person towards the one or more UWB radar. Further a chest wall distance, a breathing rate, a heart wall distance and a heart rate are determined for all the identified persons based on the identified girth and the identified orientation along with the UWB radar signals.

公开(公告)号：US20210199796A1

公开(公告)日：2021-07-01

申请号：US17105242

申请日：2020-11-25

Applicant: Tata Consultancy Services Limited

Inventor： Anwesha KHASNOBISH ,  Arindam RAY ,  Smriti RANI ,  Amit SWAIN ,  Chirabrata BHAUMIK ,  Tapas CHAKRAVARTY

IPC: G01S13/88 ,  G01S7/41 ,  G01S13/02

Abstract: Radar based HR and BR measurements by simultaneous decoding is a technical problem due to presence of intermodulation of BR and HR harmonics, which degrades simultaneous decoding. Embodiments herein provide a method and system for unobtrusive liveliness detection and monitoring of a subject using a Dual Frequency Radar (DFR) in an IOT network. The system has the capability to completely process the captured raw signals onboard to by applying required signal conditioning and extraction of relevant information using unique signal processing techniques for determining the HR and the BR of the subject accurately. The intermodulation of BR and HR harmonics is eliminated by the system by performing frequency spectrum averaging of both radars signals, which improves the accuracy. Further, the system is configured with a light MQTT protocol and encoding modules for any data to be shared for off board processing, ensuring data security and privacy compliance.

公开(公告)号：US20240118413A1

公开(公告)日：2024-04-11

申请号：US18374809

申请日：2023-09-29

Applicant: Tata Consultancy Services Limited

Inventor： Amit SWAIN ,  Anwesha KHASNOBISH ,  Smriti RANI ,  Chirabrata BHAUMIK ,  Tapas CHAKRAVARTY

IPC: G01S13/90 ,  G01S7/41

CPC classification number: G01S13/9023 ,  G01S7/417 ,  G01S13/9011

Abstract: The present disclosure provides a method for surface wear inspection using millimeter wave radar. The system initially receives a plurality of uncompressed raw Synthetic Aperture Radar (SAR) images. Further, a plurality of reconstructed SAR images are generated based on the plurality of uncompressed raw SAR images using a variable focusing based Range Doppler Algorithm (RDA). Further, a master image and a slave image are selected from the reconstructed SAR images and corresponding anchor points are assigned. Further a plurality of fine level and coarse level shift coordinates are computed based on the corresponding anchor points. Further, a net shift value is computed based on the plurality of fine level and coarse level shift coordinates. The master and the slave images are aligned based on the net shift value and the interferogram is generated. The interferogram is further analyzed to profile the corresponding deformation pertaining to the surface under test.

公开(公告)号：US20210121076A1

公开(公告)日：2021-04-29

申请号：US17009179

申请日：2020-09-01

Applicant: TATA CONSULTANCY SERVICES LIMITED

Inventor： Anwesha KHASNOBISH ,  Raj RAKSHIT ,  Smriti RANI ,  Andrew GIGIE ,  Tapas CHAKRAVARTY

IPC: A61B5/0205 ,  A61B5/00

Abstract: This disclosure relates to selection of optimum channel in twin radars for efficient detection of cardiopulmonary signal rates. State-of-the-art solutions involve use of IQ (In-phase and Quadrature) channel radar which need continuous calibration. Distance of the radar from a subject being monitored affects performance. The present disclosure enables enhanced cardiopulmonary signal rate monitoring using a time domain approach, wherein only the data from signal reflected off the radar is considered. The solution is also time window adaptive. Signal property and radar physics-based methods have been implemented for selecting an optimum channel in twin radars thereby enhancing detection of respiration rate and breath rate.

公开(公告)号：US20180338700A1

公开(公告)日：2018-11-29

申请号：US15912341

申请日：2018-03-05

Applicant: Tata Consultancy Services Limited

Inventor： Anwesha KHASNOBISH ,  Kingshuk CHAKRAVARTY ,  Debatri CHATTERJEE ,  Aniruddha SINHA

IPC: A61B5/0496 ,  A61B5/00 ,  A61B3/113

CPC classification number: A61B5/0496 ,  A61B3/113 ,  A61B5/7207 ,  A61B5/721 ,  A61B5/725 ,  A61B5/726

Abstract: This disclosure relates generally to head movement noise removal from electrooculography (EOG) signals, and more particularly to systems and methods for wavelet based head movement artifact removal from electrooculography (EOG) signals. Embodiments of the present disclosure provide for head movement noise removal from the EOG signals by acquiring EOG signals of a user, filtering the acquired EOG signals to obtain a first set of filtered EOG signals, smoothening the first set of filtered EOG signals to obtain smoothened EOG signals, removing one or more redundant patterns and one or more direct current (DC) drifts from the smoothened EOG signals to obtain a second set of filtered EOG signals, and applying, a discrete wavelet transform on the second set of filtered EOG signals to filter a plurality of head movement noise from the second set of filtered EOG signals of the user.

公开(公告)号：US20210215521A1

公开(公告)日：2021-07-15

申请号：US17112414

申请日：2020-12-04

Applicant: Tata Consultancy Services Limited

Inventor： Arijit SINHARAY ,  Rajat Kumar DAS ,  Anwesha KHASNOBISH ,  Tapas CHAKRAVARTY

IPC: G01F1/86 ,  G01F1/66

Abstract: This disclosure relates to a system and method for measuring average temperature of mixed fluid in an enclosed chamber. Measurement is based on two independent principle as measuring variation in acoustic wave velocity and variation in resistivity that works on a single setup. First principle is based on measuring acoustic wave velocity in a known medium, which is isolated from the surrounding. The system comprises a primary pipe and a secondary pipe, wherein the ends of the pipes reside inside the enclosed chamber. The primary pipe is made out of good conductor of heat and filled with air. Ends of the primary pipe is fitted with a transducers have one transmitter at one end and one receiver at another end. Average temperature of the mixed fluid is measured based on the variations in sound velocity of acoustic wave passed through the primary pipe and resistivity variations of the primary pipe.

公开(公告)号：US20210123828A1

公开(公告)日：2021-04-29

申请号：US17036140

申请日：2020-09-29

Applicant: Tata Consultancy Services Limited

Inventor： Arijit SINHARAY ,  Anwesha KHASNOBISH ,  Raj RAKSHIT

IPC: G01M1/22 ,  G01S7/539

Abstract: This disclosure relates generally to method and system for non-contact ultrasound based vibration detection. Here, non-contact vibration detection plays crucial role in industries for monitoring and analyzing machine vibrations to predict early warnings of the potential failures. The method includes receiving, from a non-contact ultrasonic air transducer a signal reflected from a plurality of vibrating parts of a machine. The non-contact ultrasound obtains vibrational frequencies corresponding to the vibrating part of the machine which are further analyzed to determine an electrical impedance of a piezoelectric element. Further, based on the electrical impedance occurred vibrations are detected in each vibrating part from the plurality of vibrating parts of the machine. The measured impedance signal utilizes continuous sinusoidal excitation which enables narrow band filtering to increase signal to noise ratio. The proposed disclosure provides a low cost simple solution thereby reducing design complexity of the non-contact ultrasonic transducer circuit.

公开(公告)号：US20190171348A1

公开(公告)日：2019-06-06

申请号：US16321286

申请日：2017-05-23

Applicant: Tata Consultancy Services Limited

Inventor： Arpit VISHWAKARMA ,  Aniruddha SINHA ,  Ratnamala MANNA ,  Debatri CHATTERJEE ,  Vedraj VEDRAJ ,  Kingshuk CHAKRAVARTY ,  Rajat Kumar DAS ,  Anagha Nikhil MEHROTRA ,  Arpan PAL ,  Rahul Dasharath GAVAS ,  Anwesha KHASNOBISH ,  Abhijit DAS

IPC: G06F3/0481 ,  G06F3/01 ,  G06N20/00

Abstract: System and method for aiding communication for subjects suffering from paralysis of muscles controlled by peripheral nervous system are disclosed. A method for aiding communication for said subjects includes capturing, from a plurality of sensors, sensor data generated based on an interaction of a subject with an interactive UI. The plurality of sensors includes one or more body-parts movement tracking sensors for tracking motion of body-parts of the subject and one or more physiological signal sensors for monitoring physiological signals generated from the subject during the interaction. A plurality of model parameters indicative of characteristics of the subject related to the interaction are determined based on the sensor data. The navigation at the interactive UI is controlled on the plurality of model parameters.