| In the past period of time,China was in a period of rapid development,the social economy was prosperous and prosperous,and the quality of life of the people was also increasing.At the same time of rapid development,China's inevitable problems also appeared.The phenomenon of population aging is One of the more serious problems.According to the latest census data of China,the total population of China is 139.008 million,of which the population of 60 years old and above is 240.9 million,accounting for 17.3% of the total population,of which the population of 65 years old and above is158.31 million,accounting for the total population.11.4% of the population.The health problems of the elderly have gradually attracted our attention and become a serious concern in China.In particular,cardiovascular and cerebrovascular diseases are the biggest obstacle to the health of the elderly.Cardiovascular disease is characterized by its hidden condition,suddenness and high risk.Therefore,it is an effective method to achieve daily monitoring,automatic diagnosis,early detection and timely treatment.Therefore,this article presents a wearable device that monitors heart rate,blood oxygen,heart rate waveforms,and temperature.It consists of a power supply module,a central processing unit module,a human body data acquisition module,and a Bluetooth wireless transmission module.At the same time,a mobile application software(APP)is produced for receiving data transmitted by Bluetooth and displaying human life data.The power supply module uses a battery;the central processing unit module uses an Arduino Lilypad microcontroller with an Atmega328 chip as its core;the Bluetooth wireless transmission module uses a HC08 module;and the data acquisition module uses a sensor with a MAX30102 chip as its core.The specific process is as follows:First,the data acquisition module obtains two human photoelectric volume pulse signals and temperature signals of red light and infrared light,and then filters and amplifies the signals;then transmits the signals to the central processing unit for A/D conversion,and passes The algorithm completes the calculation of heart rate,blood oxygen saturation and temperature;finally,the heart rate,blood oxygen saturation,temperature and heart rate waveform data are transmitted to the mobile phone through the Bluetooth wireless transmission module,and the data is displayed on the mobile phone APP.By measuring the different parts of the human body,comparing the quality of thewaveform and the accuracy of the data to determine the two measurement sites of the forehead and chest,respectively,a garment and hat that can monitor heart rate,oxygen saturation,temperature and waveform..Under the conditions of sitting,standing,lying and walking,the chest and forehead were examined with clothes and hats respectively and compared with medical pulse oximeter and electronic thermometer.The difference between the data of 95% of the heart rate value obtained by measuring the forehead with the hat and the standard heart rate is within 5,and the measured blood oxygen saturation is within 3 of the standard value except the walking state.The heart rate value obtained by measuring the chest of the clothes is less than 5,and the difference between the measured data and the standard heart rate is within 5,and the difference between the measured blood oxygen saturation and the standard value is within 3.The measured difference between the temperature and the body temperature is at most 2.4 degrees,and the maximum value is 1.4 degrees except for the walking state.Finally,the power consumption test is performed,and the specific power of the detecting device is 150 mw. |
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