def global_var_init():

    # 设置周期，采样频率，记录名称
    global cycle, fs, record_name, data_path

    data_path = r"C://Users//Lenovo//Desktop//data_1020" 
    record_name = "xueguangyue_1.csv" 
    cycle = 1000 # 此处是生成txt文件(to_txt.py)中的周期，而预处理(processing.py)时会处理全部周期
    fs = 250 # ECG采样频率
    
    return  cycle, fs, record_name, data_path