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11.发明授权公开(公告)号：US11550049B2
公开(公告)日：2023-01-10
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
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.
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公开(公告)号：US20220136924A1
公开(公告)日：2022-05-05
申请号：US17453031
申请日：2021-11-01
Applicant: Tata Consultancy Services Limited
Inventor： Arijit Sinharay , Gitesh Kulkarni , Abhijeet Gorey , Chirabrata Bhaumik , Tapas Chakravarty , Arpan Pal
Abstract: Fluids are normally transported from one place to another through pipelines. It is essential to monitor the pipeline to avoid leakage or theft. It is expensive and not feasible to install cameras and sensors along the whole length of the pipeline. A system and method for inspecting and detecting fluid leakage in a pipeline has been provided. The system is using vibration sensors along with pressure sensors to detect the leakage or theft along with the exact location of the leakage or theft. The pressure sensors are mounted on the pipeline so that the fluid touches the diaphragm of the pressure sensors to sense the wave generated due to leakage. The vibration sensors are mounted on top of the pipeline surface and on the nearby ground to eliminate general noise conditions. Moreover, two pressure sensors are also installed at opposite sides to pinpoint the leakage location.
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公开(公告)号：US11115108B2
公开(公告)日：2021-09-07
申请号：US17079220
申请日：2020-10-23
Applicant: Tata Consultancy Services Limited
Inventor： Achanna Anil Kumar , Girish Mariswamy Chandra , Tapas Chakravarty
IPC: H04B7/08 , G06F17/14 , H04B7/0426 , H04B7/06
Abstract: This disclosure relates generally to field agnostic source localization. Conventional state-of-the-art methods perform source localization for near-field scenario by estimating carrier frequency and direction of arrival (DOA) at or above Nyquist sampling rate. Embodiments of the present disclosure provide a method for source localization at sub Nyquist sampling rate. The method estimates parameters such as range, carrier frequency and DOA of source signals from data sources in a mixed field scenario. i.e., the data sources may reside in far-field as well as near-field. The method considers a delay channel to a sensor receiver architecture for estimating the parameters. The disclosed method can be used in applications like cognitive radio to determine the carrier frequency, DOA and range of various source signals from data sources in mixed field.
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公开(公告)号：US09967715B2
公开(公告)日：2018-05-08
申请号：US15200781
申请日：2016-07-01
Applicant: Tata Consultancy Services Limited
Inventor： Nasimuddin Ahmed , Avik Ghose , Tapas Chakravarty , Arpan Pal
CPC classification number: H04W4/33 , G01S5/0252 , H04W4/021 , H04W4/043
Abstract: Method(s) and System(s) for determining location of a user device within a premise are described. The method includes identifying multiple zones with physical boundaries within the premise based on parameters associated with geometry of the premise. The premise includes multiple access points distributed across the multiple zones. Thereafter, the method includes collecting a first set of Received Signal Strength Indicator (RSSI) Data that is representative of strength of signals received from each accessible access point, at different locations within the premise. After collecting the first set, the method includes computing a Variable Path Loss Exponent (VPLE) within each zone for each accessible access point for determining location of the user device based on at least one of the first set of RSSI data, a line of sight condition, a non-line of sight condition and distance between each accessible access point from each location.
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15.发明申请COMPUTER IMPLEMENTED SYSTEM AND METHOD FOR WI-FI BASED INDOOR LOCALIZATION 有权计算机实现系统和基于WI-FI的室内定位的方法公开(公告)号：US20150257014A1
公开(公告)日：2015-09-10
申请号：US14560741
申请日：2014-12-04
Applicant: TATA CONSULTANCY SERVICES LIMITED
Inventor： Nasimuddin Ahmed , Chirabrata Bhaumik , Avik Ghose , Arpan Pal , Amit Agrawal , Tapas Chakravarty
CPC classification number: H04W16/20 , G01S5/0252 , H04W4/04 , H04W24/10
Abstract: The present disclosure envisages a computer implemented system and method for Wi-Fi based indoor localization. The system includes a repository for storing attributes of the floor plan of an indoor area with respect to the zones on the floor plan. A communicating module receives a threshold number of data points from user devices located in the area. These data points include a plurality of Received Signal Strength Indicators (RSSI) captured from the access points positioned in the area. A k-means clustering is then performed on the data points for grouping the data points into ‘k’ number of clusters and a decision tree is built by following a condition based approach. Distance values are then calculated pertaining to the RSSIs stored at the decision tree, and zone circles are plotted. Zone of user presence is then determined by correlating the plotted zone circles upon the floor plan using maximum overlap property.
Abstract translation: 本公开设计了用于基于Wi-Fi的室内定位的计算机实现的系统和方法。 该系统包括用于存储关于平面图上的区域的室内平面图的属性的存储库。 通信模块从位于该区域中的用户设备接收阈值数量的数据点。 这些数据点包括从位于该区域中的接入点捕获的多个接收信号强度指示符（RSSI）。 然后对数据点执行k均值聚类，以将数据点分组为“k”个簇，并通过遵循基于条件的方法构建决策树。 然后计算与决定树上存储的RSSI相关的距离值，并绘制区域圆。 然后通过使用最大重叠属性将平面图上绘制的区域圆相关联来确定用户存在区域。
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Patent Agency Ranking
16.发明授权公开(公告)号：US12298420B2
公开(公告)日：2025-05-13
申请号：US17956006
申请日：2022-09-29
Applicant: Tata Consultancy Services Limited
Inventor： Avik Ghose , Chirabrata Bhaumik , Tapas Chakravarty , Amit Swain
Abstract: Ultra Wide Band (UWB) based Real Time Location Systems (RTLS) that are being used for location tracking suffer from environment specific errors that are introduced due to factors such as difference in reflection and propagation. In order to address this challenge, present invention discloses performing error modelling for object localization using Ultra Wide Band (UWB) sensors. The error modelling allows to correct a determined location of an object being tracked, to determine a corrected location. Based on an obtained distance value of a tag node with reference to position of a plurality of anchor nodes, location of an object in a 2-Dimensional space is determined. The determined location is corrected to obtain the corrected location, and in this process the error modelling and related error correction is done.
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公开(公告)号：US11270429B2
公开(公告)日：2022-03-08
申请号：US16900106
申请日：2020-06-12
Applicant: Tata Consultancy Services Limited
Inventor： Achanna Anil Kumar , Rishab Khawad , Riddhi Panse , Andrew Gigie , Tapas Chakravarty , Kriti Kumar , Saurabh Sahu , Mariswamy Girish Chandra
Abstract: The disclosure herein generally relates to image processing, and, more particularly, to a method and system for impurity detection using multi-modal image processing. This system uses a combination of polarization data, and at least one of a depth data and an RGB image data to perform the impurity material detection. The system uses a graph fusion based approach while processing the captured images to detect presence of the impurity material, and accordingly alert the user.
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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.
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公开(公告)号：US10960893B2
公开(公告)日：2021-03-30
申请号：US15878857
申请日：2018-01-24
Applicant: Tata Consultancy Services Limited
Inventor： Arijit Chowdhury , Avik Ghose , Tapas Chakravarty
Abstract: This disclosure relates generally to driver profiling, and more particularly to system and method for driver profiling corresponding to automobile trip. In one embodiment, the method includes selectively computing, based on GPS data captured during a trip, features such that a first set of features are computed at a computation device and a second set of features are computed at a cloud server. The first and second set of features differs in computational complexity level. Said features include statistical data for attributes computed from the GPS data. The features corresponding to the trip are stored at repository associated with the cloud server. The repository includes previously precomputed features data associated with a set of driver profiles for previously completed trips. A driver profile corresponding to the trip is identified from amongst the set of driver profiles based on comparison of the plurality of features and the previously computed features data.
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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
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.
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