公开(公告)号：US12237086B2

公开(公告)日：2025-02-25

申请号：US17653248

申请日：2022-03-02

Applicant: Tata Consultancy Services Limited

Inventor： Avik Ghose ,  Avijit Samal ,  Nasimuddin Ahmed ,  Shivam Singhal ,  Karan Bhavsar ,  Vivek Chandel ,  Sundeep Khandelwal ,  Harsh Vishwakarma ,  Bhaskar Pawar

IPC: G16H50/30 ,  G06F16/178 ,  G06F16/25 ,  G16H40/67

Abstract: Non-communicable diseases (NCDs) are the pandemics of modern era and are generating huge impact in the modern society. Conventional methods are inaccurate due to a challenge in handling data from heterogenous sensors. The present disclosure is capable of tracking fitness parameters of a user even with heterogenous sensors. Initially, the system receives a raw data from a plurality of heterogenous sensors associated with the user. The raw data is further transformed into a metadata format associated with the corresponding sensor. The transformed data is temporally aligned based on a time based slotting. An algorithm pipeline corresponding to a disorder to be analyzed is selected from a Directed Acyclic Graph (DAG) based on a sensor metadata and a plurality of algorithm metadata corresponding to a plurality of algorithms stored in an algorithm database and an algorithm pipeline. The corresponding disorder is analyzed using the algorithm pipeline.

公开(公告)号：US10397753B2

公开(公告)日：2019-08-27

申请号：US15336191

申请日：2016-10-27

Applicant: Tata Consultancy Services Limited

Inventor： Shalini Arora ,  Avik Ghose ,  Shivani Johari ,  Vivek Chandel ,  Nasimuddin Ahmed

IPC: G01C19/00 ,  G01S11/06 ,  H04W4/04 ,  G01C21/16 ,  G01C21/20

Abstract: Sensor data fusing systems and methods are provided. The fusing system reads and parses a floor plan to obtain a location of a user, identifies a grid in the floor plan using the location, determines a distance between the user and beacons placed at every corner of identified grid, and further trilaterating the location using beacon identifiers. The system further assigns a weight to the trilaterated location based on the distance between the user and the beacons in the grid to obtain a first set of weights, and computes one or more weights using number of particles generated with respect to an inertial measurement obtained from an inertial sensor to obtain a second set of weights. The fusing system further fuses the first set of weights and the second set of weights to obtain a first and a second co-ordinate that indicates specific position of the user in the location.

公开(公告)号：US20190056426A1

公开(公告)日：2019-02-21

申请号：US15935731

申请日：2018-03-26

Applicant: TATA CONSULTANCY SERVICES LIMITED

Inventor： Vivek Chandel ,  Kartik Muralidharan ,  Avik Ghose ,  Archan Misra

IPC: G01P21/00 ,  G01P3/44 ,  G01C19/5776

CPC classification number: G01P21/00 ,  G01C19/00 ,  G01C19/5776 ,  G01C25/005 ,  G01P3/44

Abstract: Embodiments of the present disclosure provide systems and methods that establish non-linear components of gyroscope errors which have not been studied or explored earlier. These errors include but are not limited to non-linear dynamic error which is a function of the angular velocity itself. Bias instability has been observed within the same environment of temperature and atmospheric pressure. In other words, the embodiments of the present disclosure analyse and models static bias errors and dynamic non-linear errors in the gyroscope sensor which may be used to model and correct errors accordingly In subsequent measurements. The system provide solution(s) when there is no way of directly estimating temperature for bias correction of gyroscope, by estimating a temperature change by considering indirect measurements from other sensors present onboard the device.

公开(公告)号：US11699522B2

公开(公告)日：2023-07-11

申请号：US16396276

申请日：2019-04-26

Applicant: Tata Consultancy Services Limited

Inventor： Avik Ghose ,  Arijit Chowdhury ,  Sakyajit Bhattacharya ,  Vivek Chandel ,  Arpan Pal ,  Soma Bandyopadhyay

IPC: G06N5/02 ,  G06N5/04 ,  G06K9/62 ,  G06F16/9035 ,  A61B5/00 ,  G16H40/67 ,  G06F16/908 ,  G06N5/022 ,  G06F18/25

CPC classification number: G16H40/67 ,  A61B5/7275 ,  G06F16/908 ,  G06F16/9035 ,  G06F18/251 ,  G06N5/022 ,  G06N5/04

Abstract: This disclosure relates generally to a unified platform for domain adaptable human behaviour inference. The platform provides a unified, low level inference and high level inference of domain adaptable human behaviour inference. The low level inferences include cross-sectional analysis techniques to infer location, activity, physiology. Further the high inference that provide useful and actionable for longitudinal tracking, prediction and anomaly detection is performed based on several longitudinal analysis techniques that include welch analysis, cross-spectrum analysis, Feature of interest (FOI) identification and time-series clustering, autocorrelation-based distance estimation and exponential smoothing, seasonal and non-seasonal models identification, ARIMA modelling, Hidden Markov models, Long short term memory (LSTM) along with low level inference, human meta-data and application domain knowledge. Further the unified human behaviour inference can be obtained across multiple domains that include health, retail and transportation.

公开(公告)号：US11558710B2

公开(公告)日：2023-01-17

申请号：US17178081

申请日：2021-02-17

Applicant: Tata Consultancy Services Limited

Inventor： Vivek Chandel ,  Snehasis Banerjee ,  Avik Ghose

IPC: H04W4/02 ,  H04B17/318 ,  H04Q9/00

Abstract: Conventionally, Received Signal Strength Indicator (RSSI)-based solutions have been extensively devised in the domains of indoor localization and context-aware applications. These solutions are primarily based on a path-loss attenuation model, with customizations on RSSI processing and are usually regression-based. Further, existing solutions for distance and proximity estimation incorporate data features derived only from the RSSI values themselves with additional features like frequency of occurrence of certain RSSI values thus are less accurate. Present disclosure provides systems and methods that implement a classification model that uses RSSI as well as temporal features derived from the received data packets. The model uses data from multiple devices in different environments for training and can execute proximity decisions on the device itself. The method of the present disclosure monitoring proximity between a plurality of devices implements/uses an effective protocol for decision aggregation to suppress false positive proximity events generated and further stabilizes device's response.

公开(公告)号：US11373731B2

公开(公告)日：2022-06-28

申请号：US16179784

申请日：2018-11-02

Applicant: Tata Consultancy Services Limited

Inventor： Vivek Chandel ,  Dhaval Satish Jani ,  Sundeep Khandelwal ,  Shalini Mukhopadhyay ,  Dibyanshu Jaiswal ,  Avik Ghose ,  Arpan Pal ,  Kartik Muralidharan

IPC: G16B40/00 ,  A61B5/0205 ,  A61B5/00 ,  A61B5/024 ,  A61B5/11 ,  G16B50/00

Abstract: This disclosure relates generally to classification of cardiopulmonary fatigue. The method and system provides a longitudinal monitoring platform to classify cardiopulmonary fatigue of a subject using a wearable device worn by the subject. The activities of the subject is continuous monitored by plurality of sensors embedded in a wearable device. The received sensor signals are processed in multiple stages to classify cardiopulmonary fatigue as healthy or unhealthy based on respiratory, heart rate and recovery duration parameters extracted from the received sensor data. Further using the classified cardiopulmonary fatigue level, the C2P also performs longitudinal analysis to detect potential cardiopulmonary disorders.

公开(公告)号：US12111982B2

公开(公告)日：2024-10-08

申请号：US18465409

申请日：2023-09-12

Applicant: Tata Consultancy Services Limited

Inventor： Vivek Chandel ,  Avik Ghose

IPC: G06F3/0346 ,  G06F1/16 ,  G06F3/01

CPC classification number: G06F3/0346 ,  G06F1/163 ,  G06F3/014

Abstract: Tracking motion using inertial sensors embedded in commercial grade wearables like smartwatches has proved to be a challenging task, especially if real-time tracking is a requirement. Present disclosure provides system and method wherein data from sensors are obtained and scaled. Further, Euler Rodrigues Matrix (ERM) is generated based delta value obtained using sensor data. The scaled sensor data and ERM are used for generating feature vectors. Windowing technique is applied for subsets of feature vectors to obtain label for each window and machine learning model is trained with the label and window. Further, during real-time, sensor data is obtained, and steps of ERM, feature vectors generation, and application of windowing technique are repeated, and coordinates are estimated for each window in real-time based on which trajectories are tracked in real-time for each window.

公开(公告)号：US11350851B2

公开(公告)日：2022-06-07

申请号：US16827756

申请日：2020-03-24

Applicant: Tata Consultancy Services Limited

Inventor： Vivek Chandel ,  Shivam Singhal ,  Avik Ghose

IPC: A61B5/103 ,  A61B5/00 ,  G01C19/00 ,  G01L1/16 ,  G01P7/00 ,  G01P15/02 ,  G01P15/18

Abstract: The present disclosure provides wearable apparatus and method for calculating drift-free plantar pressure parameters for gait monitoring of an individual. Most conventional techniques use different kind of sensors placed in in-sole based wearable apparatus but are costly and not effective in calculating accurate plantar pressure parameters. The disclosed wearable apparatus uses off-the shelf piezoelectric sensors that are widely available in market with less cost. The drift-free plantar pressure parameters are calculated using drift-free static pressure data obtained by numerically integrating acquired dynamic sensor data from the piezoelectric sensors, using a LiTCEM correction mechanism. A 6-DOF Inertial Measurement Unit (IMU sensor) helps in isolating zero-pressure duration indicating when a foot of the individual is in air during a stride, while obtaining the drift-free static pressure data. The disclosed wearable apparatus calculate the drift-free plantar pressure parameters for long duration and facilitates monitoring walking patterns of the individual.