人体的生理参数在一定程度上反映了一个人的健康状况，可以作为医学临床诊断和健康监护的重要参考依据，如何准确便捷地检测和处理人体生理参数是生物健康医学领域热门的研究课题之一。近年来生活质量的提高让人们的健康意识得到了很大地增强，相应地对生理参数的监测提出了更高的要求，对便携式检测系统的需求日益增加。现有的医疗监测设备大多体积庞大，不便于移动和携带，而且价格相对昂贵，不适用于日常家庭的生理参数检测。

针对以上描述的问题，本文设计一种便携式人体生理参数检测系统，该系统能够采集人体的心电、脉搏、心率和体温等生理参数，并且可以使用蓝牙通信方式将数据传输至移动监护平台，具有体积小，精度高，交互方便，操作简单等特点，能够满足家庭成员的生理健康监测需求。

本文研究工作简述如下：

首先，说明便携式生理参数检测系统检测的各种生理信号的整体特征。其中包括PPG信号的产生机制和采集原理，ECG信号的波形特点及其所表达的生理信息，PPG信号和ECG信号结合的无创连续血压检测技术的原理，以及体温检测原理和方式。

其次，根据便携系统的设计需求和各种生理参数的不同特征，选取适合系统的主控芯片和集成模拟前端芯片，完成系统的整体设计方案构建。

再次，在Altium Designer开发环境下，完成便携式生理参数检测系统的各个模块的硬件电路设计，包括PPG信号采集模块、ECG信号采集模块、温度采集模块、MCU控制模块、蓝牙通信模块、电源管理模块、LED控制模块以及通信接口电路的设计等，并在Multisim软件环境下对部分模块电路进行仿真验证。

然后，对MCU和蓝牙芯片进行嵌入式软件设计。MCU的软件设计主要实现对系统整体的控制，完成生理信号的采集与处理；低功耗蓝牙芯片的软件设计，主要实现系统硬件设备数据的无线传输功能，完成系统硬件设备与手机终端的通信。

最后，设计测试方案，对系统的功能进行检测验证，并与其他同类设备进行比较。通过实验发现，该系统性能稳定可靠，操作简单，采集数据准确，可以满足日常家庭生理参数检测的需要，可用来提供连续可靠的生理健康监测。

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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