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Can wearables function as second galvanic skins?

Posted: 09 Dec 2015 ?? ?Print Version ?Bookmark and Share

Keywords:wearables? Galvanic Skin Response? GSR? electrodermal response? amplifier?

Wearable demonstrations and platforms
The Wellness Watch Demonstration Platform is a complete system with algorithms for:

???Continuous heart rate (optical)
???Pulse oximetry (optical)
???Temperature (electrical)
???Hydration level (electrical)
???Activity (MEMS)
???Connectivity (Bluetooth)

The platform includes the MAX66242 NFC Chip with integrated security:

The MAX66242 is a key part of sensor interface with a wireless connection via RFID technology. This component is used for Medical Sensor Authentication and Calibration. The NFC Temperature Patch and the Pulse Oximetry Patch feature this device (figures 11 and 12).

Figure 10a: The Wellness Watch (Image courtesy of Maxim Integrated)

NFC Temperature Patch Demonstration Platform

Figure 11: The NFC Temperature Patch as a thermometer (Image courtesy of Maxim Integrated)

This device features: No contact; Energy harvesting; Secure authentication; and Single use; no contamination.

Figure 12: System diagram for the NFC Temperature Patch design (Image courtesy of Maxim Integrated)

Pulse Oximetry Patch Demonstration Platform

Figure 13: The Pulse Oximetry Patch (Image courtesy of Maxim Integrated)

This device features: Real-time monitoring; Long battery life; and No contact: lower contamination risk.

Fit 2 Shirt Demonstration Platform
This is a total EKG/fitness platform (figure 14).

Figure 14: The Fit 2 Shirt (Image courtesy of Maxim Integrated)

This system features: Mobile, real-time analytics; Can be used for people ranging from athletes to patients; and Improved measurement accuracy, battery life, and system size over the Fit Shirt 1.

Figure 15: Full capabilities of the Fit 2 Shirt (Image courtesy of Maxim Integrated)

Figure 16: Fit 2 Shirt technology features from Maxim Integrated (Image courtesy of Maxim Integrated)

Figure 17: A basic block diagram of the Maxim Wellness Platform Reference Design system. The Wellness Watch, Pulse Oximetry Patch and Fit 2 Shirt demonstration platforms are included under this umbrella. The exclusive rights to these systems designs belong to Sarvint: Wellness Watch, Fit 2 Shirt, Temperature Patch, Pulse Oximetry Patch. (Image courtesy of Maxim Integrated)

References
1. The Galvanic Skin Response (GSR) and Investigation into 'Cheating' iWorx lab experiment by Dr. Paul Wagner and Dr. Tracy Wagner, Asst. Professors, Washburn University, Topeka, KS.
2. A wearable device for monitoring galvanic skin response to accurately predict changes in blood pressure indexes and cardiovascular dynamics, K. Subramanya, Vishnuprasada V. Bhat, and Sandeep Kamath, 2013 Annual IEEE India Conference (INDICON)

About the author
Steve Taranovich is a senior technical editor at EDN with 41 years of experience in the electronics industry. Steve received his MSEE from Polytechnic University, Brooklyn, New York, and his BEEE from New York University, Bronx, New York. He is also chairman of the Educational Activities Committee for IEEE Long Island. His expertise is in analogue, RF and power management with a diverse embedded processing education as it relates to analogue design from his years at Burr-Brown and Texas Instruments. Steve was a circuit design engineer for his first 16 years in electronics. He then served as one of the first field application engineers with Burr-Brown Corp and also became one of their first global account managers, traveling to Europe, India and China.


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