A novel yet effective motion artefact reduction method for continuous physiological monitoring
journal contributionposted on 20.05.2016, 11:02 by Abdullah Alzahrani, Sijung HuSijung Hu, Vicente Azorin-Peris, Roy KalawskyRoy Kalawsky, Xiaolong Zhang, Changqing Liu
This study presents a non-invasive and wearable optical technique to continuously monitor vital human signs as required for personal healthcare in today’s increasing ageing population. The study has researched an effective way to capture human critical physiological parameters, i.e., oxygen saturation (SaO2%), heart rate, respiration rate, body temperature, heart rate variability by a closely coupled wearable opto-electronic patch sensor (OEPS) together with real-time and secure wireless communication functionalities. The work presents the first step of this research; an automatic noise cancellation method using a 3-axes MEMS accelerometer to recover signals corrupted by body movement which is one of the biggest sources of motion artefacts. The effects of these motion artefacts have been reduced by an enhanced electronic design and development of self-cancellation of noise and stability of the sensor. The signals from the acceleration and the opto-electronic sensor are highly correlated thus leading to the desired pulse waveform with rich bioinformatics signals to be retrieved with reduced motion artefacts. The preliminary results from the bench tests and the laboratory setup demonstrate that the goal of the high performance wearable opto-electronics is viable and feasible.
The authors would like to express their thanks to Loughborough University and The Ministry of Higher Education in the Kingdom of Saudi Arabia represented at Taif University for this study and the financial support to carry out this study. Also, the authors would like to acknowledge the 7th European Community Framework Program for financial support through a Marie Curie International Research Staff Exchange Scheme (IRSES) Project entitled “Micro-Multi-Material Manufacture to Enable Multifunctional Miniaturised Devices (M6)” (Grant No. PIRSES-GA-2010-269113).
- Mechanical, Electrical and Manufacturing Engineering