Heart rate driven unsupervised techniques for continuous monitoring of arousal trend of users

US11045136B2 · kind B2 · utility

Assignee

• Tata Consultancy Services Limited · IN

Inventors

• Tanuka Bhattacharjee · Sherghati, IN
• Shreyasi Datta · Sherghati, IN
• Deepan Das · Sherghati, IN
• Anirban Dutta Choudhury · Sherghati, IN
• Arpan Pal · Sherghati, IN
• Prasanta Ghosh · San Ramon, US

Key dates

• Filing date: Nov 14, 2018
• Grant date: Jun 29, 2021
• Expiry date: Mar 14, 2039

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B5/0245
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Traditionally arousal classification has been broadly done in multiple classes but have been insufficient to provide information about how arousal level of user changes over time. Present disclosure propose a continuous and unsupervised approach of monitoring the arousal trend of individual from his/her heart rate by obtaining instantaneous HR for time windows from a resampled time series of RR intervals obtained from ECG signal. A measured average heart rate (a measured HR) is computed from instantaneous HR specific to user for each time window thereby estimating apriori state based on a last instance of an aposteriori state initialized and observation of a state space model of Kalman Filter is determined for computing error and normalizing thereof which gets compared with a threshold for continuous monitoring of arousal trend of the user. The aposterior state is further updated using Kalman gain computed based on measurement noise determined for state space model.