基于STM32的脈搏信號(hào)采集系統(tǒng)設(shè)計(jì)
[Abstract]:The physiological and pathological information of human body reflected in pulse wave has always been paid attention to by Chinese and foreign medical circles. A comprehensive analysis of the shape, intensity, velocity and rhythm of the pulse wave shows that it can reflect many physiological and pathological blood flow characteristics in the human cardiovascular system. The pulse wave signal conversion is carried out in order to have an objective discrimination standard for pulse pattern, thus providing reference for the prevention and treatment of diseases. In this paper, a pulse signal collection system is designed, which realizes the functions of extracting pulse signal, amplifying filtering, displaying the lower computer, alarming and displaying the upper computer, and so on. The main research contents are as follows: (1) the pulse signal conditioning circuit is designed in this paper to process the pulse signal collected by the HK-2000B pulse sensor, such as primary amplification, notch processing, band-pass filtering, secondary amplification and so on. This can not only improve the amplitude of the signal, but also filter out the interference of a variety of clutter. (2) in this paper, a 12-bit high-precision AD converter with STM32 processor is adopted. The analog pulse signal processed by pulse signal conditioning circuit is processed by digital filtering and pulse frequency calculation. The waveform and pulse rate can be displayed by LCD screen, and can be alerted by buzzer when the pulse frequency exceeds the limit range. (3) in this paper, we use Lab VIEW, which has good graphic interface design and digital signal processing ability, to design the upper computer interface. The lower computer transmits the processed pulse signal to the upper computer through the serial port. The host computer can store the information of the collector, set up the serial communication, and display, store and replay the pulse wave signal further. The pulse signal acquisition system designed in this paper has the characteristics of low power consumption, portable and so on. The combination of hardware and software can achieve a good filtering effect, which makes the collected pulse signal more accurate. The display function of the lower computer enables the collector to observe more clearly and intuitively the change of his pulse, the storage of the information of the collector by the upper computer, and the display of the pulse waveform. Storage and playback can make it easier for doctors to observe and analyze the pulse waveform of the collector and to understand the condition in detail.
【學(xué)位授予單位】:西北師范大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:R443;TP274.2
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