公开(公告)号：US20210022713A1

公开(公告)日：2021-01-28

申请号：US16827743

申请日：2020-03-24

Applicant: Tata Consultancy Services Limited

Inventor： Anwesha Khasnobish ,  Raj Rakshit ,  Arijit Sinharay ,  Tapas Chakravarty

IPC: A61B8/08 ,  A61B8/02 ,  G01S15/89 ,  G01S7/52 ,  G01N29/46

Abstract: This disclosure relates generally to bio-signal detection, and more particularly to method and system for non-contact bio-signal detection using ultrasound signals. In an embodiment, the method includes acquiring an in-phase I(t) baseband signal and a quadrature Q(t) baseband signal associated with an ultrasound signal directed from the sensor assembly towards the target. Magnitude and phase signals are calculated from the in-phase and quadrature baseband signals, and are filtered by passing through a band pass filter associated with a predefined frequency range to obtain filtered magnitude and phase signals. Fast Fourier Transformation (FFT) of the filtered magnitude and phase signals is performed to identify frequency of dominant peaks of spectrum of the magnitude and phase signals in the ultrasound signal. Value of the bio-signal associated with the target is determined based on weighted values of the frequency of the dominant peaks of the magnitude and phase signals.

公开(公告)号：USD838845S1

公开(公告)日：2019-01-22

申请号：US29608639

申请日：2017-06-23

Applicant: Tata Consultancy Services Limited

Designer： Arijit Sinharay ,  Deb Kumar Ghosh ,  Sanjoy Debnath ,  Raj Rakshit

公开(公告)号：US10969482B2

公开(公告)日：2021-04-06

申请号：US16254190

申请日：2019-01-22

Applicant: Tata Consultancy Services Limited

Inventor： Arijit Chowdhury ,  Raj Rakshit ,  Tapas Chakravarty

IPC: G01S13/86 ,  G01S13/56 ,  G08B21/04 ,  G01S15/58 ,  G01S17/58 ,  G01S15/42 ,  G01S15/66 ,  G01S13/58 ,  G01S15/87 ,  G01S3/80

Abstract: The present disclosure provides means for detecting and tracking a moving object using RADAR and ultrasonic sensors. A stationary RADAR detects the moving object and estimates speed and two rotating ultrasonic sensors determine distance of the detected object. An incrementally changing orientation of the ultrasound sensors is associated with an angular speed of rotation based on a last logged distance of the moving object from the ultrasound sensors. Once the moving object is detected, based on an adaptively changing sampling frequency, the moving object is continuously tracked in real time. Conventionally, multiple RADARs are needed for location estimation and motion tracking. Also, merely using a RADAR in combination with an ultrasound sensor also does not serve the purpose since both sensors are static. The present disclosure provides a simple cost effective alternative that can find application in say tracking of an elderly person living alone in an unobtrusive manner.

公开(公告)号：US10898107B2

公开(公告)日：2021-01-26

申请号：US15809403

申请日：2017-11-10

Applicant: Tata Consultancy Services Limited

Inventor： Raj Rakshit ,  Arijit Sinharay ,  Parijat Dilip Deshpande ,  Tapas Chakravarty ,  Arpan Pal ,  Deb Kumar Ghosh ,  Shreyasi Datta

IPC: A61B5/097 ,  A61B5/087 ,  A61B5/091 ,  A61B5/00 ,  A61B5/08

Abstract: A pulmonary health monitoring system aims at assessing pulmonary health of subjects. Conventional techniques used for pulmonary health monitoring are not convenient to the subjects and needs considerable cooperation from the subjects. But, there is a challenge in utilizing the conventional devices to the subjects not capable of providing considerable cooperation. The present disclosure includes a blow device applicable to all kind of subjects and doesn't need cooperation from the subjects. Further, in the present disclosure, the blow device generates a phase shifted signal corresponding to a breathe signal and the phase shifted signal is further processed to extract a set of physiological features. Further, pulmonary health of a subject is analyzed by processing the set of physiological features based on a ridge regression based machine learning technique.

公开(公告)号：US11666227B2

公开(公告)日：2023-06-06

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

CPC classification number: A61B5/0205 ,  A61B5/7225 ,  A61B5/7246 ,  A61B5/7257

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：US11375021B2

公开(公告)日：2022-06-28

申请号：US17136436

申请日：2020-12-29

Applicant: Tata Consultancy Services Limited

Inventor： Chirabrata Bhaumik ,  Rajat Das ,  Arpan Pal ,  Tapas Chakravarty ,  Raj Rakshit ,  Avik Ghose ,  Amit Swain ,  Arijit Sinharay

IPC: H04L12/00 ,  H04L67/125 ,  G06F16/25 ,  G16Y30/00 ,  G16Y40/10

Abstract: Any sensing system is faced with triangle of dilemma between accuracy, latency and energy. High energy and high latency sensing systems are often very accurate but less useful. Embodiments herein provide a method and system for edge based sensor controlling in the IoT network for event monitoring. The system disclosed herein applies a hierarchical sensor selection process and adaptively chooses sensors among multiple sensors deployed in the IoT network. Further, on-the-fly changes operation modes of the sensors to automatically produce the best possible inference from the selected sensor data, in time, power and latency at the edge. Further, sensors of the system include a waveform and diversity control mechanism that enables controlling of an excitation signal of the sensor.

公开(公告)号：US10935459B2

公开(公告)日：2021-03-02

申请号：US16248646

申请日：2019-01-15

Applicant: Tata Consultancy Services Limited

Inventor： Arijit Sinharay ,  Raj Rakshit ,  Dibyendu Roy ,  Tapas Chakravarty ,  Balamuralidhar Purushothaman

IPC: G01M13/028 ,  G01S17/50 ,  G01S13/86 ,  G01S13/52 ,  G01S15/52 ,  G01H9/00 ,  G01N29/46 ,  G01S13/50 ,  G01S15/50

Abstract: This disclosure relates generally to methods and systems for unobtrusive and automated detection of frequencies of spatially located distinct parts of a machine. Location of vibration and detection of vibration frequency of each vibrating part in a machine is critical for routine monitoring and fault detection in the machine. Current solutions use either high frames per second (fps) industrial grade camera or stroboscopes tuned at one particular frequency. Manual stroboscopes require manual intervention for objects moving at different speeds with high convergence time. Point-lasers need prior knowledge of exact location of faults. Also Point-by-point scanning of a large machine body is time consuming. In the present disclosure, a movement detector such as RADAR enables detecting all vibration frequencies that also serve to reduce the search space of a stroboscope configured to start strobing at each detected vibration frequency to enable mapping of each vibration frequency to a corresponding vibrating part.