脉搏血氧仪(keil5).rar

//复数的模，模值*N/2 对应该频率下信号的幅度，模值/N直流信号幅度 s1[i].real=sqrtf(s1[i].real*s1[i].real+s1[i].imag*s1[i].imag); s2[i].real=sqrtf(s2[i].real*s2[i].real+s2[i].imag*s2[i].imag); //printf("%d\n",s1[i].real); } s1_max_index = find_max_num_index(s1, 60); //最大幅度值为第几个 s2_max_index = find_max_num_index(s2, 60); //printf("%d\n",s1_max_index); //printf("%d\n",s2_max_index); //Heart_Rate = 74; if(s1_max_index == s2_max_index) { //Heart_Rate = 75; Heart_Rate = 60*100*((s1_max_index+s2_max_index )/2)/FFT_N; //printf("\r\n心率为: %d\r\n",Heart_Rate);