Session 26: Biosensors & the Environment Around Us
A Flexible Hybrid (FHE) Wearable Biometric Human Performance Monitor (BHPM)
Thursday, June 22, 2017
1:40 PM - 2:10 PM
Our wearable monitor quantifies human ECG signals and skin temperature, and has a Kapton® substrate with sensors on one side and electronics on the other connected by plated thru hole vias. A single pair of electrodes captures the ECG signal and the skin temperature is measured with a printed thermistor. The ECG electrodes are either nanoparticle printed gold or electroplated Cu/Ni/Au. ECG signals are detected, amplified and filtered by an analog chip, and digitized and preprocessed using a microcontroller with built-in BlueTooth® that transmits data to a host for further analysis and display. Thermistors are screen printed onto gold printed traces, and its high sensitivity temperature-dependent conductivity changes are feed directly to the microprocessor via an ADC. Monitor accuracy was verified by comparing host signals with certified ECG inputs. The 2”x2” monitors mount on the lower left rib cage with the ECG electrodes at diagonal corners placed along an axis running through the heart. Heart rate and four clinical heart rate variability parameters are calculated. Power consumption is minimized by component selection and optimization of custom software that controls duty cycle, and on-board change detection that enables communication only when significant changes are detected. Monitor sensitivity to cardiac changes was verified by on-human testing using cycling from rest to mild exercise and return to rest. Capacitive coupled ECG electrodes were also tested using a circuit incorporating a custom high-gain/low-noise flexible silicon operational amplifier and custom high specific capacitance electrodes. Sponsor: NanoBiology Manufacturing Consortium FA86501327311-7 and the Air Force Research Laboratory
James N. Turner received a BS in Engineering Science and a PhD in Biophysical Science from the State University of New York at Buffalo. He was at the Wadsworth Center, New York State’s Department of Health and Prof. of Biomedical Sciences, and Prof. of Biomedical Engineering Renessalear Polytechnic Institute. He is a Research Scientist at Binghamton University’s Center of Excellence in Small Scale Systems Integration & Packaging, developing programs in flexible hybrid electronics for applications in the biomedical and biological sciences. He has 132 full-length multidisciplinary publications applying the principles of engineering and physical sciences to biological and biomedical studies.