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1. 发明公开

EP3884857A1 METHODS AND SYSTEMS FOR DETERMINING BREATHING RATE AND HEART RATE FROM CARDIOPULMONARY SIGNALS 有权
公开(公告)号：EP3884857A1
公开(公告)日：2021-09-29
申请号：EP20217334.0
申请日：2020-12-28
申请人： Tata Consultancy Services Limited
发明人： Rani, Smriti , Khasnobish, Anwesha , Ray, Arindam , Chakravarty, Tapas
IPC分类号： A61B5/024 , A61B5/08 , A61B5/00 , A61B5/0507
摘要： 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.

2. 发明公开

EP3045919A1 System and method for estimating speed of a vehicle 有权
标题翻译：系统在VERFAHREN ZURSCHÄTZUNGDER GESCHWINDIGKEIT EINES FAHRZEUGS
公开(公告)号：EP3045919A1
公开(公告)日：2016-07-20
申请号：EP15159205.2
申请日：2015-03-16
申请人： Tata Consultancy Services Limited
发明人： Chowdhury, Arijit , Chakravarty, Tapas , Purushothaman, Balamuralidhar
IPC分类号： G01P3/50 , G01P7/00 , G01C21/16 , B60W40/107 , B60W40/105
CPC分类号： G07C5/0841 , B60W40/105 , B60W40/107 , G01C21/16 , G01C21/165 , G01P3/00 , G01P3/50 , G01P7/00
摘要： System and method for estimating speed of a vehicle is disclosed. Speed of a vehicle is recorded using a first sensor at a time interval of a plurality of time intervals. The first sensor can be a GPS sensor delivering velocity data. Further, an acceleration of the vehicle may be recorded using a second sensor at each sub-interval of the time interval. The second sensor can be a MEMS accelerometer. At each sub-interval, a forward speed and a backward speed of the vehicle are obtained based upon the acceleration at each sub-interval. The forward speed is determined by adding the integrated sub-interval acceleration values to the first sensor value present at the start of the time interval. The backward speed is obtained by subtracting the integrated sub-interval acceleration values from the first sensor value present at the end of the time interval. After obtaining the forward speed and the backward speed, a predefined weight may be assigned to the forward speed and the backward speed at each sub-interval. Subsequently, a corrected speed of the vehicle at each sub-interval is calculated from a weighted sum of the forward speed and the backward speed. Further, a change of speed during the time intervals is determined from the difference of the speed data of the first sensor. Based upon the slope, a choice can be made between different algorithms for determining the speed of the vehicle at each sub-interval, e.g using the weighted sum or the maximum or minimum value of the forward and backward speed.
摘要翻译：公开了用于估计车辆速度的系统和方法。使用第一传感器以多个时间间隔的时间间隔记录车辆的速度。第一个传感器可以是传送速度数据的GPS传感器。此外，可以使用第二传感器在时间间隔的每个子间隔记录车辆的加速度。第二传感器可以是MEMS加速度计。在每个子间隔，基于每个子间隔处的加速度获得车辆的前进速度和后退速度。通过将积分的子间隔加速度值与在时间间隔开始时存在的第一传感器值相加来确定前进速度。通过从时间间隔结束时存在的第一传感器值减去积分子间隔加速度值来获得后退速度。在获得前进速度和后退速度之后，可以将预定义的重量分配给每个子间隔的前进速度和后退速度。随后，根据前进速度和后退速度的加权和来计算每个子间隔的车辆的校正速度。此外，根据第一传感器的速度数据的差异，确定时间间隔期间的速度变化。基于斜率，可以在用于确定车辆在每个子间隔的速度的不同算法之间进行选择，例如使用前进和后退速度的加权和或最大或最小值。

3. 发明授权

EP2587414B1 Packaged rfid passive tag for small sized devices 有权转让
标题翻译：为小型设备封装的RFID标签
公开(公告)号：EP2587414B1
公开(公告)日：2015-06-17
申请号：EP12189629.4
申请日：2012-10-23
申请人： Tata Consultancy Services Limited
发明人： Chakravarty, Tapas , Ghosh, Deb Kumar , Purushothaman, Balamuralidhar
IPC分类号： G06K19/077
CPC分类号： G06K19/07798 , A61B90/90 , A61B90/98 , G06K19/07752 , Y10T29/4913

4. 发明公开

EP3764070A1 ARTIFICIAL INTELLIGENCE BASED TEMPERATURE MEASUREMENT IN MIXED FLUID CHAMBER 有权
公开(公告)号：EP3764070A1
公开(公告)日：2021-01-13
申请号：EP20184738.1
申请日：2020-07-08
申请人： Tata Consultancy Services Limited
发明人： DAS, RAJAT KUMAR , Sinharay, Arijit , CHOUDHURY, Arijit , Chakravarty, Tapas , PAL, Arpan
IPC分类号： G01K7/02 , G01K7/42 , G01K11/24 , G06N20/00
摘要： Temperature measurement is an important part of many potential applications in process industry. Conventional temperature measurement methods require manual intervention for process monitoring and fail to provide accurate and precise measurement of temperature of an enclosed mixed fluid chamber. The present disclosure provides artificial intelligence based temperature measurement in mixed fluid chamber. A plurality of inputs pertaining to the mixed fluid chamber are received to build a fluid based model. The fluid based model is used to generate one or more fluid parameters. The one or more fluid parameters are used along with a ground truth temperature data and the received plurality of inputs for training an artificial intelligence (AI) based model. However, the AI based model is trained with and without knowledge of fluid flow. The trained AI based model is further used to accurately estimate temperature of the mixed fluid chamber for a plurality of test input data.

5. 发明授权

EP2731363B1 A method and system for accurate straight line distance estimation between two communication devices 有权
公开(公告)号：EP2731363B1
公开(公告)日：2019-02-06
申请号：EP13189393.5
申请日：2013-10-18
申请人： Tata Consultancy Services Limited
发明人： Ghose, Avik , Jha, Abhinav , Chakravarty, Tapas , Bhaumik, Chirabrata
IPC分类号： H04W4/02 , H04W4/80 , G01S5/02

6. 发明公开

EP3406189A1 SYSTEM AND METHOD FOR HEART RATE ESTIMATION 有权
公开(公告)号：EP3406189A1
公开(公告)日：2018-11-28
申请号：EP18150915.9
申请日：2018-01-10
申请人： Tata Consultancy Services Limited
发明人： Mukhopadhyay, Shalini , Ahmed, Nasimuddin , Ghose, Avik , Sinharay, Arijit , Jaiswal, Dibyanshu , Chowdhury, Arijit , Vempada, Ramu Reddy , Chakravarty, Tapas , Pal, Arpan
IPC分类号： A61B5/024 , A61B5/00
CPC分类号： A61B5/721 , A61B5/02416 , A61B5/02438 , A61B5/7239 , A61B5/7246 , A61B5/725 , A61B5/7257 , A61B5/7267 , A61B2503/22 , A61B2562/0219 , G16H40/63
摘要： Techniques for heart rate estimation are disclosed. In an embodiment, synchronized photoplethysmograph (PPG) and 3-axis acceleration signals are received. Further, the PPG and acceleration signals are partitioned into windows. Furthermore, it is determined whether motion is present in a window of the acceleration signal. Moreover, Fourier transform is performed on the signals to obtain power spectra of the signals in the window when there is motion. Also, it is determined whether a peak of the acceleration signal is present in a range around first highest PPG peak. Further, it is determined whether the peak of the acceleration signal affects heart rate of the user when the peak of the acceleration signal is in the range around the highest PPG peak. The heart rate of the user in the window is then estimated using second highest PPG peak when the peak of the acceleration signal affects heart rate of the user.

7. 发明公开

EP2933160A2 Method and system for controlling a speed of a vehicle 有权
标题翻译： Verfahren und System zur Steuerung einer Geschwindigkeit eines Fahrzeugs
公开(公告)号：EP2933160A2
公开(公告)日：2015-10-21
申请号：EP15154889.8
申请日：2015-02-12
申请人： Tata Consultancy Services Limited
发明人： Chakravarty, Tapas , Chowdhury, Arijit , Purushothaman, Balamuralidhar
IPC分类号： B60W30/14 , B60W30/20
CPC分类号： B60W30/143 , B60W30/20 , B60W2520/105 , B60W2550/147 , B60W2550/402 , B60W2720/10
摘要： 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.
摘要翻译：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急速能量值。可以基于冲击能量值来确定车辆在该段上的中间冲击能量。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（Ã）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。

8. 发明公开

EP2631991A1 Microstrip antenna 有权
标题翻译： Mikrostreifenantenne
公开(公告)号：EP2631991A1
公开(公告)日：2013-08-28
申请号：EP13156364.5
申请日：2013-02-22
申请人： Tata Consultancy Services Limited
发明人： Chakravarty, Tapas , Balamuralidhar, Purushothaman
IPC分类号： H01Q9/04 , H01Q21/29 , H01Q25/00
CPC分类号： H01Q9/0407 , H01Q9/045 , H01Q9/0457 , H01Q21/293 , H01Q25/00
摘要： The subject matter described herein relates a microstrip antenna (200). In one implementation, the microstrip antenna (200) comprises a dielectric substrate (202), a first metallic layer (204) on a first side of the dielectric substrate (202) and a second metallic layer (206) on a second side, opposite to the first side, of the dielectric substrate (202). The first metallic layer (204) on the dielectric substrate (202) comprises one or more end-to-end slots (214) to divide the first metallic layer (204) into a plurality of microstrip patches (216). The microstrip antenna (200) also comprises a feed circuit (208) which is electromagnetically coupled to the plurality of microstrip patches (216) and the second metallic layer (206).
摘要翻译：本文所述的主题涉及微带天线（200）。在一个实施方案中，微带天线（200）包括电介质基底（202），介电基片（202）的第一侧上的第一金属层（204）和第二侧上的第二金属层（206）到电介质基板（202）的第一侧。电介质基片（202）上的第一金属层（204）包括一个或多个端到端槽（214），以将第一金属层（204）分成多个微带贴片（216）。微带天线（200）还包括电磁耦合到多个微带贴片（216）和第二金属层（206）的馈电电路（208）。

9. 发明公开

EP3913534A1 SYSTEM AND METHOD FOR REAL-TIME RADAR-BASED ACTION RECOGNITION USING SPIKING NEURAL NETWORK(SNN) 有权
公开(公告)号：EP3913534A1
公开(公告)日：2021-11-24
申请号：EP20213433.4
申请日：2020-12-11
申请人： Tata Consultancy Services Limited
发明人： Dey, Sounak , Mukherjee, Arijit , Banerjee, Dighanchal , RANI, Smriti , George, Arun , Chakravarty, Tapas , Chowdhury, Arijit , Pal, Arpan
IPC分类号： G06K9/46 , G06K9/62 , G06K9/00
摘要： This disclosure relates generally to action recognition and more particularly to system and method for real-time radar-based action recognition. The classical machine learning techniques used for learning and inferring human actions from radar images are compute intensive, and require volumes of training data, making them unsuitable for deployment on network edge. The disclosed system utilizes neuromorphic computing and Spiking Neural Networks (SNN) to learn human actions from radar data captured by radar sensor(s). In an embodiment, the disclosed system includes a SNN model having a data pre-processing layer, Convolutional SNN layers and a Classifier layer. The preprocessing layer receives radar data including doppler frequencies reflected from the target and determines a binarized matrix. The CSNN layers extracts features (spatial and temporal) associated with the target's actions based on the binarized matrix. The classifier layer identifies a type of the action performed by the target based on the features

10. 发明公开

EP3769689A1 METHOD AND SYSTEM FOR NON-CONTACT BIO-SIGNAL DETECTION USING ULTRASOUND SIGNALS 审中-公开
公开(公告)号：EP3769689A1
公开(公告)日：2021-01-27
申请号：EP20164495.2
申请日：2020-03-20
申请人： Tata Consultancy Services Limited
发明人： Khasnobish, Anwesha , Rakshit, Raj , Sinharay, Arijit , Chakravarty, Tapas
IPC分类号： A61B8/02 , A61B8/08 , A61B5/02 , A61B5/024 , A61B5/08 , A61B5/113
摘要： 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.

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