/// <summary>
 /// 改变速度
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void ChangedSv(object sender, RoutedPropertyChangedEventArgs <double> e)
 {
     try
     {
         if (TaskInoke == null)
         {
             return;
         }
         string su = e.NewValue.ToString();
         TaskInoke.ControlSp(su);
     }
     catch (Exception ex)
     {
         Log.error("改变速度问题" + ex.Message);
     }
 }