公开(公告)号：US10338089B2

公开(公告)日：2019-07-02

申请号：US14751749

申请日：2015-06-26

Applicant: Tata Consultancy Services Limited

Inventor： Tapas Chakravarty ,  Arijit Chowdhury ,  Balamuralidhar Purushothaman

IPC: G01P3/42 ,  G01S19/13 ,  G01P21/00 ,  G01S19/40 ,  G01S19/52

Abstract: A method and system for determining a speed of a vehicle based on a GPS speed captured from a Global Positioning System (GPS). A capturing module captures GPS speed Vx and a horizontal accuracy value corresponding to a time stamp Tx. A speed modification module modifies the GPS speed Vx corresponding to the time stamp Tx. A speed correcting module corrects the GPS speed Vx corresponding to the time stamp Tx. The GPS speed may be corrected by filtering an error in the GPS speed by using a Slope dependent averaging (SDA) filter in order to obtain a first corrected speed Vx′. Further, the first corrected speed is corrected by selecting one of a center weight (CW) filter and an edge weight (EW) filter, based upon a pre-defined condition, in order to obtain a second corrected speed Vx″ indicating the speed of the vehicle.

公开(公告)号：US10241973B2

公开(公告)日：2019-03-26

申请号：US15061929

申请日：2016-03-04

Applicant: Tata Consultancy Services Limited

Inventor： Rahul Sinha ,  Balamuralidhar Purushothaman ,  Tapas Chakravarty

IPC: G06F17/30 ,  G06F17/18 ,  G06F17/14 ,  H03M7/30

Abstract: Disclosed is a method and system for reducing data size of raw data. The system may process the raw data for calculating Renyi entropies, Wigner Ville Distributions (WVD's), Wigner Ville Spectrum (WVS) and Renyi divergence. The system may identify a first set of windows followed by a second set of windows while processing the raw data. Further, the system may calculate Eigen values for a Time-Frequency matrix of WVS of the second set of windows. The system may filter the second set of windows based on the Eigen values for preparing a third set of windows. The system prepares clusters of the Eigen values. The system may compute centroids of the clusters of the Eigen values. The system classifies each window of the third set of windows into one of the clusters indicating a relevant category of event identified from the raw data.

公开(公告)号：US20190033124A1

公开(公告)日：2019-01-31

申请号：US15922521

申请日：2018-03-15

Applicant: Tata Consultancy Services Limited

Inventor： Sushovan MUKHERJEE ,  Dibyendu Roy ,  Tapas Chakravarty ,  Arpan Pal

IPC: G01H9/00 ,  G09G3/34 ,  G01M1/20 ,  G01M1/22 ,  G01H1/00

Abstract: This disclosure relates generally to an optical strobing based multi-frequency vibration measurement, and more particularly to systems and methods for autonomous stroboscopic machine inspection for multi-point and multi-frequency vibration measurement. Embodiments of the present disclosure provide for an optical strobing based multi-frequency vibration measurement by selecting a strobe frequency, obtaining one or more image frames, obtaining a marker position, calculating a fast fourier transformation, obtaining one or more peak prominent frequencies, obtaining a product set of the one or more peak prominent frequencies, optimizing the strobing frequency where the value of the product set of the one or more peak prominent frequencies is not equal to an optimum pre-defined system value and detecting and measuring a plurality of vibrations of multiple frequencies by applying a chinese remainder theorem on the product set and the strobe frequency set.

公开(公告)号：US20170006436A1

公开(公告)日：2017-01-05

申请号：US15200781

申请日：2016-07-01

Applicant: Tata Consultancy Services Limited

Inventor： Nasimuddin Ahmed ,  Avik Ghose ,  Tapas Chakravarty ,  Arpan Pal

IPC: H04W4/04 ,  H04W4/02

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.

Abstract translation: 描述用于确定内部用户设备位置的方法和系统。 该方法包括基于与前提的几何结构相关联的参数在前提内识别具有物理边界的多个区域。 前提包括跨多个区域分布的多个接入点。 此后，该方法包括在前提内的不同位置处收集代表从每个可访问接入点接收的信号的强度的第一组接收信号强度指示符（RSSI）数据。 在收集第一组之后，该方法包括针对每个可访问接入点计算每个区域内的可变路径损耗指数（VPLE），以基于第一组RSSI数据，视线中的至少一个来确定用户设备的位置 条件，非线视线条件和每个位置的每个可访问接入点之间的距离。

公开(公告)号：US09324192B2

公开(公告)日：2016-04-26

申请号：US14182833

申请日：2014-02-18

Applicant: Tata Consultancy Services Limited

Inventor： Tapas Chakravarty ,  Avik Ghose ,  Balamuralidhar Purushothaman ,  Arpan Pal ,  Arijit Chowdhary

IPC: G07C5/00 ,  G05B23/02

CPC classification number: G07C5/00 ,  G05B23/0235

Abstract: A monitoring unit for vehicle monitoring comprising a receiving module configured to receive data from an OBD, wherein the data is associated with a plurality of jerks detected by a 3-axis accelerometer. The monitoring unit comprises an analytics module configured to compare an intensity of each jerk of the plurality of jerks to a predefined jerk threshold and capture high intensity jerks from the plurality of jerks. The high intensity jerks have intensity equal to or more than the predefined jerk threshold. The method further comprises determining an elapsed time for each of the high intensity jerks. The elapsed time for each of the high intensity jerks is compared to a predefined time threshold. Further it is determined whether an analysis on the high intensity jerks is to be performed at the vehicle or at a server located remotely.

Abstract translation: 一种用于车辆监视的监控单元，包括被配置为从OBD接收数据的接收模块，其中所述数据与由三轴加速度计检测到的多个跳线相关联。 监测单元包括分析模块，其被配置为将多个抖动中的每个冲击的强度与预定的加加速度阈值进行比较，并捕获来自多个跳动的高强度跳动。 高强度强度具有等于或大于预定的加加速度阈值的强度。 该方法还包括确定每个高强度跳跃的经过时间。 将每个高强度抖动的经过时间与预定义的时间阈值进行比较。 此外，确定是否在车辆或位于远程的服务器上执行对高强度刺激的分析。

公开(公告)号：US09248837B2

公开(公告)日：2016-02-02

申请号：US14619462

申请日：2015-02-11

Applicant: Tata Consultancy Services Limited

Inventor： Tapas Chakravarty ,  Arijit Chowdhury ,  Balamuralidhar Purushothaman

IPC: B60W30/14 ,  B60W30/20

CPC classification number: B60W30/143 ,  B60W30/20 ,  B60W2520/105 ,  B60W2550/147 ,  B60W2550/402 ,  B60W2720/10

Abstract: A method and system for controlling a speed of a vehicle. Acceleration data comprising acceleration samples of the vehicle on a segment of the road is captured. Jerk energy values associated with the vehicle on the segment is computed based upon the acceleration samples. Median jerk energy of the vehicle on the segment may be determined based upon the jerk energy values. Predictive median jerk energy of the vehicle on the segment is computed using a statistical equation. A score associated with the segment is calculated based upon the median jerk energy, the predictive median jerk energy, and a standard deviation (σ). The segment is classified into one of a first set of categories and a second set of categories based upon the score. A feedback signal indicative of controlling the speed of the vehicle is transmitted to a controller based upon the classification.

Abstract translation: 一种用于控制车辆速度的方法和系统。 捕获包括在道路的段上的车辆的加速度样本的加速度数据。 基于加速度采样计算与车辆在段上相关联的冲击能量值。 可以基于加加斯能量值来确定车辆在该段上的中位冲击能量。 使用统计方程计算车辆在段上的预测中值加加斯能量。 根据中值加加斯能量，预测中值加加斯能量和标准偏差（＆sgr）计算与分段相关的分数。 该分段根据分数被分类为第一组类别和第二组类别之一。 基于分类，将指示控制车辆速度的反馈信号发送到控制器。

公开(公告)号：US09154904B2

公开(公告)日：2015-10-06

申请号：US14051733

申请日：2013-10-11

Applicant: Tata Consultancy Services Limited

Inventor： Avik Ghose ,  Abhinav Jha ,  Tapas Chakravarty ,  Chirabrata Bhaumik

IPC: H04W4/00 ,  G01S5/02 ,  H04W4/02

CPC classification number: H04W4/80 ,  G01S5/021 ,  G01S5/0215 ,  G01S5/0252 ,  G01S5/0273 ,  G01S5/0284 ,  H04W4/023

Abstract: A method and system is provided for estimating proximity and accurately calculating the straight line distance between the communicating Bluetooth enabled portable communication devices. Particularly, the invention provides a method and system for capturing the received signal strength indicator (RSSI) values form at least one target communication device (204) by the reference communication device (202); calculating the constant values of properties of communication environment of the devices by utilizing captured received signal strength indicator (RSSI) values; and deriving accurate straight line distance between the reference communication device (202) and the target communication device (204) by utilizing calculated constant values of properties of communication environment of the devices.

Abstract translation: 提供了一种用于估计接近度并准确计算通信蓝牙功能的便携式通信设备之间的直线距离的方法和系统。 特别地，本发明提供了一种用于通过参考通信设备（202）从至少一个目标通信设备（204）捕获接收到的信号强度指示符（RSSI）值的方法和系统; 通过利用捕获的接收信号强度指标（RSSI）值来计算设备的通信环境的属性的常数值; 以及通过利用计算出的设备的通信环境的特性的常数值，得出参考通信设备（202）和目标通信设备（204）之间的准确的直线距离。

公开(公告)号：US08960559B2

公开(公告)日：2015-02-24

申请号：US13660437

申请日：2012-10-25

Applicant: Tata Consultancy Services Limited

Inventor： Tapas Chakravarty ,  Deb Kumar Ghosh ,  Balamuralidhar Purushothaman

IPC: G06K19/06 ,  G08B13/14 ,  G06K19/077 ,  A61B19/00

CPC classification number: G06K19/07798 ,  A61B90/90 ,  A61B90/98 ,  G06K19/07752 ,  Y10T29/4913

Abstract: The present application is related to a unique transponder clip comprising a UHF passive RFID tag, an encapsulation module and method of attaching the encapsulation module enclosing the transponder clip to small sized devices. In an aspect, the small sized device may be a small sized medical device such as bone screw, spine screw implants. The transponder is enclosed in the encapsulation module that is then attached to a small sized device thereby facilitating auto-identification and tracking of the small sized device.

Abstract translation: 本申请涉及包括UHF无源RFID标签的独特的应答器剪辑，封装模块和将包含应答器剪辑的封装模块附接到小尺寸设备的方法。 在一个方面，小型装置可以是小尺寸的医疗装置，例如骨螺钉，脊椎螺钉植入物。 应答器封装在封装模块中，然后将其连接到小型设备，从而便于对小型设备的自动识别和跟踪。

公开(公告)号：US12196850B2

公开(公告)日：2025-01-14

申请号：US17817027

申请日：2022-08-03

Applicant: Tata Consultancy Services Limited

Inventor： Satheesh Adimoolam ,  Tapas Chakravarty ,  Arindam Ray

IPC: G01S13/89 ,  G01S13/72

Abstract: This disclosure relates generally to method and system to track and monitor human using an array of radars. Human tracking is necessarily important in security, especially with the growth of threats and incidents. Conventional systems and method lack in tracking target subject being authenticated to move around the monitoring environment. The present invention provides a method of detect human continually based on radar signals from an array of radars to track the presence of one or more target subjects associated within the monitoring environment. Further, a height surface plot of each target subject present in a radar range is constructed for identification. Then, each target subject present in the radar range of the monitoring environment based on mapping the height surface plot with a predefined height map. The characteristics of each target subject helps in detecting the target subject accurately.

公开(公告)号：US11990685B2

公开(公告)日：2024-05-21

申请号：US17663241

申请日：2022-05-13

Applicant: Tata Consultancy Services Limited

Inventor： Tapas Chakravarty ,  Aman Kumar ,  Arpan Pal ,  Achanna Anil Kumar ,  Roshan Khobragade ,  Poornima Surojia ,  Pranay Sahay ,  Manish Jain

IPC: H01Q3/08 ,  H01Q3/22 ,  H01Q9/04

CPC classification number: H01Q3/08 ,  H01Q3/22 ,  H01Q9/0414

Abstract: This disclosure relates generally to Millimeter Wave (MMW) frequency antenna scanning system. Conventional approaches available for scanning an antenna beam over a large angular swath with high directivity are unable to address concerns of size and cost involved. The technical problem of providing an MMW frequency antenna scanning system using a single small size antenna capable of scanning as desired at a desired precision is addressed in the present disclosure. The antenna scanning system provided is an electromechanical system that makes the system cost effective. Computer control provides precision control in beam steering from remote. Use of a metasurface and configuration of a radiating patch and a shorting pin in a microstrip antenna addresses the concern with regards to the size of the antenna scanning system.