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

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：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：US12257032B2

公开(公告)日：2025-03-25

申请号：US17135556

申请日：2020-12-28

Applicant: Tata Consultancy Services Limited

Inventor： Smriti Rani ,  Anwesha Khasnobish ,  Arindam Ray ,  Tapas Chakravarty

IPC: A61B5/0205 ,  A61B5/024 ,  A61B5/08

Abstract: The disclosure generally relates to determining a breathing rate and a heart rate from cardiopulmonary signal. Conventional systems use additional hardware to improve signal quality or different signal processing techniques to calculate the heart rate from the cardiopulmonary signal. However accurately determining the heart rate is always a continuous area of an improvement. The present methods and systems solve the problem of determining the heart rate accurately, from the cardiopulmonary signals, by determining the signal quality of the cardiopulmonary signal and the signal associated with the heart rate, comprised in the cardiopulmonary signal. A signal processing technique that best performs, out of a set of signal processing techniques is identified based on the signal quality to determine the heart rate. A long-term and an effective health monitoring of healthy as well as patient and infant subjects is achieved by the present disclosure.

公开(公告)号：US12164017B2

公开(公告)日：2024-12-10

申请号：US17453103

申请日：2021-11-01

Applicant: Tata Consultancy Services Limited

Inventor： Arindam Ray ,  Taniya Das ,  Arijit Chowdhury ,  Soumya Chakravarty ,  Smriti Rani ,  Anwesha Khasnobish ,  Tapas Chakravarty ,  Arpan Pal

IPC: G01S13/04 ,  G01S5/02 ,  G01S13/87 ,  G01S13/88

Abstract: An e-commerce business model has witnessed several cases where packages with faulty goods, returned by buyers, without procured object, rather replaced by different device. This disclosure relates a method to detect whether object under test a desired object. A plurality of back-scattered signals is received from the object under test occluded by packaging with continuous motion on conveyer based on first antenna-radar combination. The plurality of back-scattered signals is processed by applying four-tap difference filter to obtain motion-filtered data matrix. A low pass filter is applied on the motion-filtered data matrix to obtain enveloped motion-filtered data matrix. A sliding constant false alarm rate is applied on the enveloped motion-filtered data matrix to determine detection threshold value. A check is performed to detect whether the object under test is the desired object based on whether intensity of the plurality back-scattered signals exceeds the detection threshold value.

公开(公告)号：US20210298607A1

公开(公告)日：2021-09-30

申请号：US17135556

申请日：2020-12-28

Applicant: Tata Consultancy Services Limited

Inventor： Smriti Rani ,  Anwesha Khasnobish ,  Arindam Ray ,  Tapas Chakravarty

IPC: A61B5/0205

Abstract: The disclosure generally relates to determining a breathing rate and a heart rate from cardiopulmonary signal. Conventional systems use additional hardware to improve signal quality or different signal processing techniques to calculate the heart rate from the cardiopulmonary signal. However accurately determining the heart rate is always a continuous area of an improvement. The present methods and systems solve the problem of determining the heart rate accurately, from the cardiopulmonary signals, by determining the signal quality of the cardiopulmonary signal and the signal associated with the heart rate, comprised in the cardiopulmonary signal. A signal processing technique that best performs, out of a set of signal processing techniques is identified based on the signal quality to determine the heart rate. A long-term and an effective health monitoring of healthy as well as patient and infant subjects is achieved by the present disclosure.