Adhesive Plaster-Type Human Activity Monitoring Device

Abstract

In this study, the development of an adhesive plaster-type human activity monitoring device is presented. It is a wearable sensor system designed for monitoring human activity and health conditions to improve safety, healthcare and the quality of life. The device is attached on the human's chest for monitoring vital signals — electrocardiogram (ECG) and physical environmental information — acceleration, humidity, pressure and temperature. The entire device can fabricated within a 110 x 22 mm 2 area and is only 7 grams. Because of the small size and low weight, it can be worn comfortably. I. INTRODUCTION In recent years, the proportion of patients with lifestyle-related diseases caused by poor dietary habits, overwork and stress are increasing significantly. Moreover, due to the birthrate decline, improvements in health care and medicine, the elderly population is also increasing rapidly. To improve health, the quality of life and the prolonged medical care for elderly people, daily activity monitoring is becoming more important. To achieve this, we have realized a small-sized and low-weight adhesive plaster-type human activity monitoring device which can be comfortably and conveniently worn on the chest for monitoring the user's ECG, acceleration, humidity, pressure and temperature. II. DEVICE DETAILS Figure 1 and 2 show the block diagram and image of the monitoring device, respectively. The entire device is composed of three blocks - the Main block, RF block and Power block, and stretchable wiring is used to connect each block to allow flexibility. The device can be fabricated with an area of 110 x 22 mm 2 and is only 7 grams. The main block is composed of an ECG amplifier circuit, a 3-axes accelerometer, an altimeter sensor, humidity sensor, temperature sensor and an 8051 MCU. The RF block is equipped with a Bluetooth module. The power block is composed of a regulator and a typical coin-sized rechargeable lithium-ion battery (3.7V, 75 mAh).