修复Bug,

LIB/BACKEND/DBManager.py

@@ -433,7 +433,7 @@ class DBManager():
             gps_data = pd.DataFrame()
             system_data = pd.DataFrame()
             accum_data = pd.DataFrame()
-            storage_accum_all_data = pd.DataFrame()
+            storage_accum_data = pd.DataFrame()
             while True:
                 try:
                     print('\r' + "# get data from {} to {}.........".format(str(timefrom), str(timeto)), end=" ")