A Robust and Non-Invasive Heart-Rate Monitoring System |
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| S. Krishnamoorthy, C. S. Anoop, Boby George |
- Abstract:
- A non-invasive method for detecting the Heart Rate (HR) and the variation in the HR that aids in providing continuous, safe and effective monitoring of drowsiness of an automotive driver or a power tool operator is presented in this paper. HR is detected using an appropriately located photoplethysmograph (PPG) sensor. A simple but reliable detection scheme is developed to accurately measure HR from the PPG signal. The scheme produces a quasi-digital signal, enabling easy interface to a digital system. This signal is independent of base-line and peak-to-peak variations that are present in consecutive cycles of a PPG signal. A prototype sensor and detection circuit has been built and tested. A suitable virtual instrument has been developed, which acquires and process the signals from the detection unit to obtain the HR and its variability. Tests have been conducted on volunteers to observe HR variation between awake and drowsy conditions. A consistent trend of reduction in HR was observed as the subject changes the state from awake to sleep, which may be used as one of the parameters to monitor drowsiness. Tests were also performed, using suitably developed sensors, to check the reliability of the scheme while driving a vehicle. It recorded the HR data accurately while driving.
- Keywords:
- Heart Rate Monitor, Photoplethysmograph, Drowsiness detection, Peak Detector, Heart-Rate Variability
- Download:
- IMEKO-TC4-2013-142.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- TC4 Symposium 2013
- Title:
- 19th IMEKO TC4 Symposium Measurements of Electrical Quantities (together with 17th TC4 IWADC Workshop on ADC and DAC Modelling and Testing)
- Place:
- Barcelona, SPAIN
- Time:
- 18 July 2013 - 19 July 2013