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基于STM32的MAX301032脉率(心率)血氧检测。MAX30102传感器是一个集成的脉搏血氧仪和心率监测器模块。MAX30102传感器运行在一个1.8V电源和一个单独的3.3V电源上,通信是通过一个标准的I2c兼容的接口。当led光射向手腕上皮肤时,人体组织会反射光线给光电变换器,而光电变换器将这个光转换成了电信号并且将它变大和输出,电信号最后再经过A\D转化为数字信号。波长一定的光束在表面的指端皮肤照射后,根据反射或者是投射的反应到接收器上,由于光束受到了手指内的组织、皮肤、血液等的削弱,接收器得到的信号强度也是不会比之前强的,也就是收到了减弱,根据资料了解到手指内的除了血液的其他部分由于变化不大,对光束的削弱吸收是稳定的不变的,由此重点放在了血液上,血液的容积因为心脏的工作呈现波动变化,由此也影响到了光束信号吸收强度也有变化的规律。最后接收器接受到的信号会反应出心脏波动状态,将采集到的信号增益后也可以判断出变化容积脉搏的血流的变化状态。SCL ----PA6;SDA ----PA7;INT---PA5
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