diff --git a/PhaseCompAcq/PhaseWindow.cpp b/PhaseCompAcq/PhaseWindow.cpp
index dd69711..916d816 100644
--- a/PhaseCompAcq/PhaseWindow.cpp
+++ b/PhaseCompAcq/PhaseWindow.cpp
@@ -22,7 +22,7 @@
     this->setWindowFlags(Qt::FramelessWindowHint);
 
     // 窗口大小为占满一屏
-    QRect screenRect = QApplication::desktop()->screenGeometry();
+    QRect screenRect = QApplication::desktop()->availableGeometry();
     resize(screenRect.width(), screenRect.height());
 
     // 将窗口移动到左上角

diff --git a/PhaseCompAcq/PhaseWindow.cpp b/PhaseCompAcq/PhaseWindow.cpp
index dd69711..916d816 100644
--- a/PhaseCompAcq/PhaseWindow.cpp
+++ b/PhaseCompAcq/PhaseWindow.cpp
@@ -22,7 +22,7 @@
     this->setWindowFlags(Qt::FramelessWindowHint);
 
     // 窗口大小为占满一屏
-    QRect screenRect = QApplication::desktop()->screenGeometry();
+    QRect screenRect = QApplication::desktop()->availableGeometry();
     resize(screenRect.width(), screenRect.height());
 
     // 将窗口移动到左上角
diff --git a/PhaseCompAcq/protocol/PhaseProtocolBM.cpp b/PhaseCompAcq/protocol/PhaseProtocolBM.cpp
index 68ed68a..79b70ce 100644
--- a/PhaseCompAcq/protocol/PhaseProtocolBM.cpp
+++ b/PhaseCompAcq/protocol/PhaseProtocolBM.cpp
@@ -40,13 +40,20 @@
             dataObj->channelData.append(0.00);
             dataObj->channelDataStr.append("0.00");
             dataObj->channelRawDataStr.append(QString::number(CALCULATE_OFFSET));
-        } else
+        } else if (channelRawData > CALCULATE_OFFSET)
         {
             double phase = (channelRawData - CALCULATE_OFFSET) * CALCULATE_FACTOR;
             dataObj->channelActive.append("1");
             dataObj->channelData.append(phase);
             dataObj->channelDataStr.append(QString::number(phase, 'f', 15));
             dataObj->channelRawDataStr.append(QString::number((channelRawData - CALCULATE_OFFSET)));
+        } else
+        {
+            double phase = (CALCULATE_OFFSET - channelRawData) * CALCULATE_FACTOR;
+            dataObj->channelActive.append("1");
+            dataObj->channelData.append(phase);
+            dataObj->channelDataStr.append(QString::number(phase, 'f', 15));
+            dataObj->channelRawDataStr.append(QString::number((channelRawData - CALCULATE_OFFSET)));
         }
     }