Research On Physiological Signal Acquiring And Data Analysis System For Athlete

Gathering and processing of physiological medicine signals are one of the significant branches in biomedical engineering.These functions have provided the essential reference data for the movement physiology medical research.This thesis introduces a kind of athlete physiological signal gathering and the wireless transmission device,which can gather and transmit athletes' physiological signals real-time and accurately without any influence on the movement of athletes.Athletes need to detect several physiological signals,such as pulse signal, electrocardiosignal and myoelectric signal when on the movement.This thesis has made a comprehensive exposition on the theory and method of measurement about these signals. And this paper introduces circuit design of the pulse signal,including gathering,processing, launching and receiving,as well as the data communication and the software design. Meanwhile,using the related processing link for simulation experiments.The pulse signal has some characteristics,like small amplitude,low frequency and vulnerable interference.Using piezoelectricity and PVDF piezoelectricity membrane sensor to gather signal during the measurement.During signal processing,choosing low noise,high-precision,low-power amplifier AD620 as a pre-amplifier,and high-and low-pass filter and the frequency notch filter removal of interfering signals.Wireless communication circuits take nRF905 as the main body design proposal for some reasons, such as low emissive power,high sensitive receiver,little impact on the surrounding environment,and easy connection with SCM and the computer's serial port.In the data processing,using AT89LV51 SCM,which has 8 bits CPU and Flash EEPROM.Making use of low-voltage,low-power,high-performance features to provide a flexible and low cost embedded scheme.In the design of communication circuit,using RS-232 and MAX3232 to complete transformation between the TTL level and the RS232 level.This physiological signal gathering device has exquisite,portable and low-power characteristics,which can be used to monitor athletes' physiological signals during training and competing situation.Using the device can further enhance the competitive level and provide scientific reference.