| The physiological parameters of the human body reflect the health status of a person to a certain extent,and can be used as an important reference basis for medical clinical diagnosis and health monitoring.How to accurately and conveniently detect and process human physiological parameters is one of the hot research topics in the field of biological health medicine.In recent years,the improvement of quality of life has greatly enhanced people's health awareness.Accordingly,higher requirements have been placed on the monitoring of physiological parameters,and the demand for portable detection systems is increasing.Most of the existing medical monitoring equipment is bulky,inconvenient to move and carry,and relatively expensive,and is not suitable for daily physiological parameter detection in homes.In response to the problems described above,this paper designs a portable human physiological parameter detection system,which can collect human physiological parameters such as electrocardiogram,pulse,heart rate and body temperature,and can use Bluetooth communication to transmit data to the mobile monitoring platform.The features of small size,high precision,convenient interaction,and simple operation can meet the physiological health monitoring needs of family members.The research work of this article is briefly described as follows:First,the overall characteristics of various physiological signals detected by the portable physiological parameter detection system will be described.These include the generation mechanism and acquisition principle of PPG signal,the waveform characteristics of ECG signal and the physiological information expressed,the principle of noninvasive continuous blood pressure detection technology combining PPG signal and ECG signal,and the principle and method of body temperature detection.Secondly,according to the design requirements of the portable system and the different characteristics of various physiological parameters,the main control chip and integrated analog front-end chip suitable for the system are selected to complete the construction of the overall design of the system.Third,in the Altium Designer development environment,complete the hardware circuit design of each module of the portable physiological parameter detection system,including PPG signal acquisition module,ECG signal acquisition module,temperature acquisition module,MCU control module,Bluetooth communication The design of modules,power management modules,LED control modules and communication interface circuits,etc.,and simulation verification of some module circuits under the Multisim software environment.Then,embedded software design is carried out for MCU and Bluetooth chip.The software design of the MCU mainly realizes the overall control of the system and completes the collection and processing of physiological signals;the software design of the low-power Bluetooth chip mainly realizes the wireless transmission function of the data of the system hardware equipment and completes the communication between the system hardware equipment and the mobile terminal.Finally,design a test plan,test and verify the function of the system,and compare it with other similar devices.It is found through experiments that the system has stable and reliable performance,simple operation,and accurate data collection.It can meet the needs of daily home physiological parameter detection and can be used to provide continuous and reliable physiological health monitoring. |
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