A Pressure Sensing System for Heart Rate Monitoring with Polymer-Based Pressure Sensors and an Anti-Interference Post Processing Circuit

Heart rate measurement is a basic and important issue for either medical diagnosis or daily health monitoring. In this work great efforts have been focused on realizing a portable, comfortable and low cost solution for long-term domestic heart rate monitoring. A tiny but efficient measurement system composed of a polymer-based flexible pressure sensor and an analog anti-interference readout circuit is proposed; manufactured and tested. The proposed polymer-based pressure sensor has a linear response and high sensitivity of 13.4 kPa−1. With the circuit’s outstanding capability in removing interference caused by body movement and the highly sensitive flexible sensor device, comfortable long-term heart rate monitoring becomes more realistic. Comparative tests prove that the proposed system has equivalent capability (accuracy: <3%) in heart rate measurement to the commercial product.

[1]  R. Dauskardt,et al.  An ultra-sensitive resistive pressure sensor based on hollow-sphere microstructure induced elasticity in conducting polymer film , 2014, Nature Communications.

[2]  Yue Tian,et al.  Contact-free Measurement of Heart Rate Variability via a Microwave Sensor , 2009, Sensors.

[3]  B. Shirinzadeh,et al.  A wearable and highly sensitive pressure sensor with ultrathin gold nanowires , 2014, Nature Communications.

[4]  Peng Wang,et al.  Thin Flexible Pressure Sensor Array Based on Carbon Black/Silicone Rubber Nanocomposite , 2009, IEEE Sensors Journal.

[5]  Tian-Ling Ren,et al.  Tiny MEMS-based pressure sensors in the measurement of Intracranial Pressure , 2014, Tsinghua Science and Technology.

[6]  Guang-Zhong Yang,et al.  A Flexible, Low Noise Reflective PPG Sensor Platform for Ear-Worn Heart Rate Monitoring , 2009, 2009 Sixth International Workshop on Wearable and Implantable Body Sensor Networks.

[7]  Benjamin C. K. Tee,et al.  Skin-like pressure and strain sensors based on transparent elastic films of carbon nanotubes. , 2011, Nature nanotechnology.

[8]  Ernesto Suaste-Gómez,et al.  Electrically Insulated Sensing of Respiratory Rate and Heartbeat Using Optical Fibers , 2014, Sensors.

[9]  Sung-hoon Ahn,et al.  A flexible and highly sensitive strain-gauge sensor using reversible interlocking of nanofibres. , 2012, Nature materials.

[10]  Julien Penders,et al.  Early results on wrist based heart rate monitoring using mechanical transducers , 2010, 2010 Annual International Conference of the IEEE Engineering in Medicine and Biology.

[11]  U. Chung,et al.  Highly Stretchable Resistive Pressure Sensors Using a Conductive Elastomeric Composite on a Micropyramid Array , 2014, Advanced materials.

[12]  Yanling Li,et al.  A Review for Conductive Polymer Piezoresistive Composites and a Development of a Compliant Pressure Transducer , 2013, IEEE Transactions on Instrumentation and Measurement.

[13]  M. Knörnschild,et al.  Corrigendum: Bats host major mammalian paramyxoviruses , 2014, Nature Communications.

[14]  H. S. Wolff,et al.  iRun: Horizontal and Vertical Shape of a Region-Based Graph Compression , 2022, Sensors.

[15]  Satish T. S. Bukkapatnam,et al.  A Low-Cost, Portable, High-Throughput Wireless Sensor System for Phonocardiography Applications , 2012, Sensors.

[16]  You Min Chang,et al.  Heartbeat Monitoring Technique Based on Corona-Poled PVDF Film Sensor for Smart Apparel Application , 2007 .

[17]  Mirna Issa,et al.  Sensor elements made of conductive silicone rubber for passively compliant gripper , 2013 .

[18]  Xuewen Wang,et al.  Silk‐Molded Flexible, Ultrasensitive, and Highly Stable Electronic Skin for Monitoring Human Physiological Signals , 2014, Advanced materials.

[19]  Young-Ho Cho,et al.  A Skin-attachable Flexible Piezoelectric Pulse Wave Energy Harvester , 2014 .

[20]  T. Ding,et al.  Research on stress and electrical resistance of skin-sensing silicone rubber/carbon black nanocomposite during decompressive stress relaxation , 2009 .

[21]  Wang Luheng,et al.  Influence of carbon black concentration on piezoresistivity for carbon-black-filled silicone rubber composite , 2009 .

[22]  Yong Gyu Lim,et al.  Flexible Capacitive Electrodes for Minimizing Motion Artifacts in Ambulatory Electrocardiograms , 2014, Sensors.

[23]  Dalibor Petković,et al.  Electrical properties estimation of conductive silicone rubber for tactile sensing structure , 2013 .

[24]  Benjamin C. K. Tee,et al.  Highly sensitive flexible pressure sensors with microstructured rubber dielectric layers. , 2010, Nature materials.

[25]  Clément Gosselin,et al.  Characterization of the electrical resistance of carbon-black-filled silicone: Application to a flexible and stretchable robot skin , 2010, 2010 IEEE International Conference on Robotics and Automation.