Wearable health sensors could monitor the wearer's health and surrounding environment in real-time. With the development of sensor and operating system hardware technology, the functions of wearable devices have been gradually enriched with more diversified forms and more accurate physiological indicators. These sensors are moving towards high precision, continuity, and comfort, making great contributions to improving personalized health care. At the same time, in the context of the rapid development of the Internet of Things, the ubiquitous regulatory capabilities have been released. Some sensor chips are equipped with data readout and signal conditioning circuits, and a wireless communication module for transmitting data to computer equipment. At the same time, for data analysis of wearable health sensors, most companies use artificial neural networks (ANN). In addition, artificial neural networks could help users effectively get relevant health feedback. Through the physiological response of the human body, various sensors worn could effectively transmit data to the control unit, which analyzes the data and provides feedback of the health value to the user through the computer. This is the working principle of wearable sensors for health. This article focuses on wearable biosensors used for healthcare monitoring in different situations, as well as the development, technology, business, ethics, and future of wearable sensors for health monitoring.
A heatstroke is one of the most serious forms of heat injury and is classified as a medical emergency. It is characterized by an elevated core body temperature along with the failed body cooling mechanism in response to the sudden heat-up. People vulnerable to a heatstroke are children, elders and sports professionals. Previous efforts have emphasized exercise adjustments and post-treatments, such as environmental-based activity modification and cold-water immersion. However, the general public, especially elders, will have difficulty to conduct such adjustments by themselves. Moreover, few studies have been conducted on the early preventive measurement stage. A wearable three-dimensional-printed thermochromic device proposed here can warn the people of a sudden rise in skin temperature and can advise them to take quick action. Combined with the smartphone applications, for both the android and iPhone platform, the device is able to monitor real-time skin temperature and alerts the people who are vulnerable to a heatstroke. The three-dimensional printable resin developed can change color at a specific activation temperature. The device has undergone a series of performance tests in order to optimize the color transition rate and stability of color change. The accuracy of our device is compared to the conventional thermometer; the regression analysis shows the R2 value is 0.7599 and the average error is 1.3 °C. Future work will be to mitigate the surrounding lighting effects on the smartphone camera and further improve our device accuracy.
The thermochromic device is a low-cost 3D-printed bracelet. It has the function of reading body temperature and warns individuals of the potential risk for heat related illnesses. The product is created from a thermochromic resin that is sensitive to temperature. This product can be customized to fit different age groups such as children and elders. Combined with the smartphone application, the device can provide realtime body temperature monitoring and alert to people who are vulnerable to heatstroke.
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