def global_var_init():

    # 设置周期，采样频率，记录名称
    global cycle, fs_ecg, fs_ppg, record_name, record_name_csv

    cycle = 370 # 此处限制的是生成txt文件中的周期，而预处理时会处理全部周期
    record_name = "s1_sit"
    record_name_csv = "s1_sit"
    fs_ecg = 500
    fs_ppg = 500
    
    return cycle, fs_ecg, fs_ppg, record_name, record_name_csv