Research And Implementation Of Respiratory Frequency Monitoring System Based On Android

With the rapid development of electronic technology and people's continuous pursuit of a better life,health monitoring equipment has an increasingly broad market.The disadvantages of traditional health monitoring equipment,such as inability to continuously monitor health parameters in real time,poor wearing comfort,and expensive testing costs,limit their popularity and application in daily life.Compared with traditional health monitoring equipment,portable wearable health monitoring equipment is popular among users because of its small size,low power consumption,real-time continuous monitoring,strong environmental adaptability,and high comfort.As we all know,breathing is an important physiological process of the human body.In clinical diagnosis,doctors often make a preliminary diagnosis of whether the human body has a disease with the frequency,depth and rhythm of breathing.In this paper,a flexible fabric strain sensor and Android operating system are used to design and implement a wearable breathing frequency monitoring system that can monitor breathing frequency in real time and has an emergency function.This system is mainly divided into two parts: lower computer and upper computer.When the human body performs breathing exercises,the lateral area of the chest and abdomen will periodically expand and contract with the breathing.Starting from the physical behavior of the human body,the lower computer uses the flexible fabric strain sensor integrated in the Wheatstone bridge to sense the change of this physical behavior,so as to realize the collection of respiratory signals.The second is to pre-process the breathing signal,including filtering the breathing signal and amplifying the breathing signal using the dual operational amplifier LM358.Then use the STC15F2K60S2 single-chip microcomputer to perform analog-to-digital conversion,breathing frequency calculation and breathing frequency OLED display on the preprocessed electrical signal.Finally,the asynchronous serial communication is used to transparently transmit the processed data to the Bluetooth module.In the upper computer part,this paper designs and implements a software application APP based on the Android operating system.This article develops a software application that integrates Bluetooth communication,location positioning,SMS sending,and sound alarm integration by using the Android operating system's Bluetooth-specific API,Google Location Service API,SmsManager API,and MediaPlayer API.The APP communicates with the Bluetooth module of the lower computer by calling the built-in Bluetooth of the mobile phone to transmit the instructions issued by the upper computer to the lower computer and the respiratory frequency data sent by the lower computer;by calling the built-in GPS of the mobile phone to locate the user's position;using SMS The sending platform sends a distress message;uses a media player to sound an alarm for abnormal breathing;in general,the APP has two major functions,namely: real-time display of breathing frequency and emergency distress function.This system adopts flexible fabric strain sensors to collect respiratory signals and selects smartphone as the terminal for respiratory frequency display and emergency distress,which realizes the user's comfortable wearing of the respiratory frequency monitoring system,strong portability,low power consumption and small size.demand.After measuring the breathing frequency in the three states of standing,sitting and lying down,the data shows that the system has small measurement error,stability and environmental anti-interference ability,which is enough to meet the daily needs of users.