Development Of A Portable Instrument For Monitoring Physiological Parameters During Physical Exercise

The task of physical exercise(PE) is for health, inappropriate quantity of exercise, however not only may not be good for this purpose, but also be harmful to health. Previous researches demonstrate that both exceeding intensity and frequency of the exercise may result in human immunity decreasing, only that appropriate intensity of the exercise can achieve the purpose of the PE. Therefore it is important to monitor the quantity of exercise in real time and remind timely during sports.In order to monitor the quantity of exercise during sports, and prevent people from exceeding exercise, a portable device for monitoring physiological parameter during exercising was developed. It is helpful for people to judge the quantity of PE.The relationship of the negative correlation between concentration of lactate in the blood and blood oxygen saturation when loading of the body is constant or increasing during sporting was employed, and the K value of blood oxygen saturation and heart rate was chosen as the monitoring parameter to design the system.Moreover, the theory and equation of invasive detection blood oxygen saturation based on the method of the double wavelength transmission were inferred in detail. The hardware platform based on ARM core, the embedding Linux operating system, and cross-platform application Qt were used to develop the device, including hardware circuits and software, and a prototype was made, in which deferent calibrating method of the exceeding exercise threshold were designed according to four types of users in this study.The device is characterized by small in volume, light in weight, simple in operating, and low cost, therefore it is suitable for people to monitor the quantity of exercises in real time during PE.