Wearable Heart Rate Monitor Study

In today's society,with the rapid development of economy and the quickening pace of life,human health is threatened by various factors,especially the rise in the incidence of cardiovascular disease has skyrocketed,and be gradually tend to be younger,and combined with the improvement of living standards,the hospital-based medical system from the past is gradually becoming more family-oriented,so wearable medical devices become a hot object of study in today's society.Thus,in this thesis is aimed at how to implement a more convenient for patients with cardiovascular disease(CVD)for 24 h monitoring designed a wearable heart rate monitor.The system as a whole can be divided into two parts:hardware acquisition module and the design of the Android APP.Hardware acquisition module based on MSP430 single chip microcomputer as control chip,using ultra-low power consumption of the heart rate sensor SON7015 to collect the patient's ecg signal,the collected ecg signals are amplified filter plastic processing of single chip microcomputer required standard pulse signal.The single-chip microcomputer gets the pulse rate through the caption of the pulse signal and a certain algorithm,the pulse rate can be real-time displayed on the cabinet of the OLED screen,after processing the data can be transmitted to the Android smartphone by a new generation of bluetooth 4.0 technology.The design of the Android APP is mainly realize the following functions:?Search the bluetooth serial port of the hardware acquisition module and connect to receive the ecg data sent by bluetooth serial port.? Be able to set up emergency contact calls,making it possible to alert emergency situations.There are two ways to call the police:One is the bell alarm,to remind the user at this time the heart rate value is abnormal,should promptly stop the current movement,and timely seek help,timely treatment;Another way of alarm is short message alarm,timely notify the guardian of the user,so that the patient's disease can be treated in time.? To achieve the positioning function,when the user's heart rate is abnormal,the guardian can be informed of their position in time.? The received ECG data is displayed on the control interface of the mobile APP through Surface View.? It can store and view the user's heart rate monitoring record.When the user's heart rate abnormality needs to be cured,these historical data have important reference value for doctors to judge the user's condition.This paper describes in detail the overall design framework of wearable heart rate monitor,the design of hardware circuit,and the implementation of each function of Android smart phone.The system has the characteristics of small size,low power consumption,portability and easy operation.It makes it possible to monitor the patients with cardiovascular diseases for a long time.