Device for monitoring pulse waveform and measuring blood pressure simultaneously
A technology of blood pressure measurement and pulse wave, applied in the direction of catheter, cardiac catheter, etc., can solve the problems of inconvenient movement, high price, and limited universal usability
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[0029] The pulse wave module acquisition system mainly includes: pulse wave sensor, analog signal conditioning circuit (ie voltage boost circuit and filter circuit), A / D conversion circuit, microcontroller C8051F330 circuit and CP2102 interface circuit, and finally transmitted to the computer for processing (such as figure 2 ).
[0030] This part of the pulse wave sensor adopts the HK2000C sensor, which uses a force-sensitive element (PVDF piezoelectric film) and is a soft-touch non-invasive pulse sensor. Compared with piezoelectric ceramics or other more traditional materials, the piezoelectric constants of the new piezoelectric material PVDF, namely piezoelectric strain constants and piezoelectric stress constants, are relatively high. It is more difficult, and the sensitivity and accuracy are relatively high. This sensor outputs an analog voltage signal that needs further processing.
[0031] The range of the output analog signal voltage of the pulse sensor is -0.5~+1.5V...
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