Browsing by Subject "Bluetooth"

Now showing 1 - 4 of 4

An Android hosted Bluetooth ECG monitoring device
(2012-05) Moreno, Marco Antonio; Abraham, Jacob A.; Sun, Nan
This paper proposes a device capable of acquiring an electrocardiogram (ECG, EKG) signal to be hosted by a typical Android smartphone. Bluetooth is used as the data connection. Once acquired, the signal is graphed on the display of the smartphone. A basis of physiology behind the ECG is presented. The data acquisition system and the performance of the ECG amplification and supporting circuits are analyzed.
Modular and reconfigurable wireless e-tattoo platform for mobile physiological sensing
(2019-05-13) Jeong, Hyoyoung; Lu, Nanshu; Valvano, Jonathan W.; Neikirk, Dean P.; Sun, Nan; Xie, Chong
Moving from traditional healthcare methods of monitoring biometrics to an individualized wearable modality promises to reduce healthcare expenses and to present better values to the end-user. Over the past few years, ultrathin and ultrasoft epidermal electronics (a.k.a. e-tattoos) have emerged as the next generation wearables. Considering health monitoring’s unlimited potential applications in telemedicine, performance tracking, human-machine interface (HMI), and personalized mobile health, it is paramount to develop more affordable, dependable, and unobstructive biometric monitoring methods compared to current expensive and confining systems. However, it is impossible to build an all-purpose e-tattoo that can accommodate such a wide range of applications, and e-tattoos are only practically useful when they can operate wirelessly. Thus, I report the design, fabrication, and validation of modular and reconfigurable wireless e-tattoos for personalized physiological sensing. Such modular e-tattoos are comprised of a multilayer stack of stretchable layers featuring distinct functionalities: a) a near field communication (NFC) layer capable of wireless power harvesting and data transmission, or battery charging, b) Bluetooth (BT) long-distance data transmission, c) functional circuit layers, d) a passive electrode/sensor layer. These layers can be disassembled and swapped out multiple times to form custom e-tattoos with user-specified sensing capabilities. To implement such flexible e-tattoos, I invent a “cut-solder-paste” microfabrication method which is rapid-prototyped via a dry, digital and cost-effective freeform manufacture process. The mechanical strain and strain-dependent characteristics of the stretchable antenna have been analyzed by finite element method (FEM). I also demonstrate reconfigurability of such modular e-tattoos so that they can be disassembled and reassembled multiple times. Multimodal e-tattoos are stretchable by up to 20% and capable of wirelessly measuring skin hydration, skin temperature, oxygen saturation level (SpO₂), heart rate, electrocardiogram (ECG), seismocardiogram (SCG) and body motion, also estimating continuous real-time blood pressure (BP). Moreover, I report a novel magnetic field repeater (feeding coil) on clothes by leveraging embroidery method and wireless capability. Utilizing this engineering framework, it enables not only more dependable and long-term but also continuous and real-time ambulatory monitoring of a variety of biometrics. I believe that this platform opens the door for accessible, and affordable personalized healthcare monitoring in the near future.
Replication system for low power internet of things devices
(2017-05) Tharp, Joshua David; Garg, Vijay K. (Vijay Kumar), 1963-; Caramanis, Constantine
As technology evolves to where persistent and ubiquitous computing devices exist the possibilities for shared computing increases. The size and power requirements of Internet of Things(IoT) devices varies from each device. However, each of these devices contains processing power, storage, and network connectivity. Many of these devices passively communicate small pieces of data to a central device. For example, a motion sensor may report times of activity to a central hub or a phone could connect to a media device. Typically, these devices communicate through wireless technology such as Wi-Fi (IEEE 802.11) or Bluetooth (IEEE 802.15). With Bluetooth 4.0 there exists another option which is Bluetooth Low Energy(BLE). With BLE devices can more efficiently query and send data to other devices with minimal power requirements. This paper aims to expand IoT devices to support an advanced protocol for replication of data suitable for vii low power devices communicating over BLE. Different methods of forming a network are considered for optimal replication of data using mesh network topologies. The report will also evaluate methods of data transfer using solely BLE or a combination of BLE and high speed high power protocol such as Bluetooth or Wi-Fi.
River : a real-time location system providing indoor positional data acquisition for use in operational improvements within the healthcare environment
(2017-12-06) Williams, Gregory Alexander; Julien, Christine, D. Sc.
Emergency Department (ED) over-crowding has enormous impact on both patient outcomes and reported satisfaction, costing hospitals thousands of dollars per year. Protocols for increasing efficiency have been proposed with varying justifications. Many consulting firms exist to help ERs identify problems and implement solutions, but no system exists specifically to benchmark all the relevant information in an automated fashion. This report describes such a system using Bluetooth Low Energy (BLE) technology implemented with beacon devices deployed in each area of interest within the ER and mobile applications that will be installed on personnel phones. This system is deployed in a physical setting, with results presented.