Journal of Theoretical and Applied Information Technology 15 th December 2016. Vol.94. No.1 © 2005 - 2016 JATIT & LLS. All rights reserved . ISSN: 1992-8645 www.jatit.org E-ISSN: 1817-3195 142 A NOVEL PHOTOPLETHYSMOGRAPH SENSOR PROBE DESIGN FOR MOTION ARTIFACT DETECTION: A COMPARISON STUDY WITH THREE AXIS ACCELEROMETER 1 MUHIDEEN ABBAS HASAN, 2 FAHMI SAMSURI, 3 KOK BENG GAN 1 Faculty of Electrical and Electronics Engineering, Universiti Malaysia Pahang, 26600, Pahang, Malaysia 2 Department of Electronics, Technical Institute/Dour, Northern Technical University, Foundation of Technical Education, Iraq 3 Department of Electrical, Electronic, and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia. E-mail: 1 muhyabass@gmail.com, 2 fahmi@ump.edu.my, 3 gankokbeng@ukm.edu.my ABSTRACT Photoplethysmography (PPG) sensors have become widespread in most of the healthcare categories; its drawback is unreliable during non-stationary states. Adaptive noise cancellation is one of the several techniques have existed to address this issue. The problem of implementing this method still lacks for total detection of induced noise due to the motion. In this work, a new method was introduced for noise detection based on novel PPG sensor probe design by adding a covered photodetector (CPD) as a motion artifact reflector, in addition to the main photodetector (MPD). Experiments of several motion kinds were executed to the tied (CPD) with the accelerometer. Data analysis for the collected signals showed a lengthy convergence between the amplitude fluctuations in the time domain. The CPD precisely indicated all the fundamental frequencies of various induced noise, unlike the accelerometer. Using these photodetectors, the CPD as noise reflector and the MPD to track the contaminated PPG signal is more reliability than other approaches. Implementing this method ensures a high-level accuracy and reducing the cost of repeated false examinations. Furthermore, simple software computation and low power consumption. Practical application of this study will be presented in our next work. Keywords: Photoplethysmograph, Motion Artifacts, Accelerometer, CPD, MPD 1. INTRODUCTION Photoplethysmography is a noninvasive method to measure changes in arterial blood flow through the skin utilizing infrared light and photodetector. PPG technique has been accepted by the International Standards Organization (ISO) and the European Committee for Standardization as the standard non-invasive measure of oxygen saturation level since 1987[1]. PPG technique has been implemented in many different medical settings, including clinical, physiological monitoring (blood oxygen saturation level, Heart Rate, Blood Pressure, Cardiac Output, Respiratory Rate), Fetal Heart Rate and person’s identity [2-5]. Despite the many PPG signal advantages as an easy to set up, comfortable, inexpensive compared to the other types of such medical devices [6]. However, PPG signals could be easily affected by intended or unintended motion in the measurement process which may conducive to the incorrect interpretation of the reported PPG signal waveform which can be used for diseases classification [7, 8]. So it is not straightforward to remove the motion artifacts from the PPG signal. Valuable efforts were spent to cope with resulted mistakes in measurements during motion state by using different techniques as reported by [9-13]. In a comparative study [14] of several currents used methods for the PPG signal processing while the non-stationary state was concluded that each of those methods has its advantages and disadvantages. Also, the mentioned study indicated that the ANC technique is not the worst of the others and could be better if a proper hardware