Design Of16-bit Multi-channel Physiological Signal Acquisition System Based On STM32

With the development and progress of human society, technology and the trendof population aging, cardiovascular and cerebrovascular diseases become a big threatto human life, and become the number one killer of human life. The cardiovascularand cerebrovascular diseases and physiological signals have a very close relationship,the physiological signals can be characterized as the body’s physiological indicators oflife, so in clinical, accurate physiological signal acquisition and analysis andprocessing, have very important significance in treatment of the disease and medicalresearch. Now，through physiological signal analysis, we can predict and diagnosethe patient’s conditions with cardio-cerebral vascular or related symptoms may occur.Physiological signal acquisition is an Indispensable part of the physiologicalsignal analysis and processing, is the most important part in cardiovascular andcerebrovascular disease diagnosis. High quality physiological signal for diagnosis ofthe disease is a huge help, so we try to collect physiological signals without distortion.With the rapid development of electronic science and technology, digital signalprocessing technology and automation development, physiological signal monitoringequipment is also moving in miniaturization, low power consumption andmulti-functional direction，facilitate the study of physiological and pathologicalconditions of people’s lives.Acqusiting accurate，reliable and diverse signals, hasgreat significance in the clinical diagnosis and treatment in medical research andteaching.The designed hardware and software platform is based on the research projectSTM3216-bit multi-channel physiological signal acquisition system, the aim is basedon the above method, to build one inexpensive portable physiological signalacquisition system.This thsis completed the following aspects of the research work: (1)describe the technical basis for physiological signal acquisition system. Firstintroduced meaning and characteristics of physiological signals, and included species,and then focus on analyze the most common cardiac electrophysiological signals thegenerated principles of physiological signals.(2)A brief introduction to the physiological signal acquisition system based ontasks and various technical indicators, the main module of choice, and identified themain function of the signal acquisition system, if implemented. Find the appropriatephysiological signal acquisition program. Hardware section details the overallhardware platform design and implementation of the physiological signal acquisitionsystem based on STM32F103. Includes the reason of choosing STM32F103as thesystem core microcontroller and it’s functions, the reason and functions of choosingA/D converter as the critical components. Describes the signal conditioning circuitdesign, including the preamplifier part of the circuit, filter circuit and protectioncomponents and so on. Software design part introduces the basic situation of USBfunction module, method of implement and their respective functions, and alsodescribes the function of the effect of each module. Hardware driver design sectionintroduces the right device driver awareness, general workflow and part of thehardware device driver design.(3)Details of the firmware program design, including the implementation of themain program, the design of A/D converter module and data transmission module,USB driver design, including the design of programs and systems introduced driverUSB driver.The system laid a good foundation for collection to a stable, high-quality,high-precision...