公开(公告)号：US20240068934A1

公开(公告)日：2024-02-29

申请号：US18355266

申请日：2023-07-19

Applicant: Tata Consultancy Services Limited

Inventor： Subhasri CHATTERJEE ,  Abhijit GOREY ,  Arijit SINHARAY ,  Chirabrata BHAUMIK ,  Tapas CHAKRAVARTY ,  Supriya GAIN ,  Arpan PAL

IPC: G01N21/17 ,  G01N33/28

CPC classification number: G01N21/1702 ,  G01N33/2888 ,  G01N2201/06113

Abstract: The disclosure relates generally to methods and systems for monitoring lubricant oil condition using a photoacoustic modelling. Conventional techniques in the art for checking the condition of the lubricant oil is laboratory based and thus time consuming, error prone and not efficient. The present disclosure discloses a photoacoustic simulation model which is developed utilizing a photonic model such as a Monte Carlo method-based optical simulation integrated with a finite element model such as a k-wave toolbox-based acoustic measurement. The photoacoustic simulation model of the present disclosure is used to obtain a photoacoustic signal of the lubricant oil sample and a set of statistical features are determined from the obtained photoacoustic signal. The determined set of statistical features are then used as a training data to develop a machine learning (ML) model which is used to classify a type of contamination of the test lubricating oil.

公开(公告)号：US20240053221A1

公开(公告)日：2024-02-15

申请号：US18218815

申请日：2023-07-06

Applicant: Tata Consultancy Services Limited

Inventor： Raj RAKSHIT ,  Arijit SINHARAY ,  Supriya GAIN ,  Arpan PAL ,  Chirabrata BHAUMIK ,  Tapas CHAKRAVARTY

IPC: G01M3/24 ,  G01M3/28

CPC classification number: G01M3/243 ,  G01M3/2815

Abstract: One of the biggest challenges faced by oil and gas companies is to monitor such long pipelines for leak events and generate false leak event alarms during routine pipe maintenance. A data associated with a first sensing unit is processed to obtain an instant timing information (T0) of a leak event in a conduit at a test environment. A data associated with a second sensing unit is processed to obtain a transient signal associated with the leak event at a specific band. An accelerometer data is filtered to obtain a band passed filtered accelerometer signal (Accelbpf). The Accelbpf is truncated in a time domain from the T0 to a duration Td of the leak event to obtain a temporal template signal (Acceltemplate). A leak event of a real-time conduit is dynamically detected at a physical environment based on Acceltemplate when a cross-correlation value is greater than a threshold value (∝).