diff --git a/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt b/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt
index 196dafa..1500877 100644
--- a/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt
+++ b/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt
@@ -18,8 +18,7 @@
     this.isScaleXEnabled = true //X轴可缩放
     this.isScaleYEnabled = false //Y轴不可缩放
     this.description.isEnabled = false
-    this.extraTopOffset = 5f //顶部边距
-    this.extraBottomOffset = 5f //底部边距
+    this.extraBottomOffset = 10f //底部边距
     //去掉图例
     this.legend.isEnabled = false
     this.animateY(1200, Easing.EaseInOutQuad)

diff --git a/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt b/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt
index 196dafa..1500877 100644
--- a/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt
+++ b/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt
@@ -18,8 +18,7 @@
     this.isScaleXEnabled = true //X轴可缩放
     this.isScaleYEnabled = false //Y轴不可缩放
     this.description.isEnabled = false
-    this.extraTopOffset = 5f //顶部边距
-    this.extraBottomOffset = 5f //底部边距
+    this.extraBottomOffset = 10f //底部边距
     //去掉图例
     this.legend.isEnabled = false
     this.animateY(1200, Easing.EaseInOutQuad)
diff --git a/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt b/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt
index edf390b..353cce4 100644
--- a/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt
+++ b/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt
@@ -124,6 +124,11 @@
                 dataSet.values = strengthEntries
                 lineDataSets.add(dataSet)
                 val lineData = LineData(lineDataSets)
+                //最多显示10min的实时数据，旧的数据删除，优化卡顿问题
+                if (lineData.entryCount > 200) {
+                    lineData.removeDataSet(0)
+                    lineData.notifyDataChanged()
+                }
                 lineData.setDrawValues(false)
                 binding.lineChart.data = lineData
                 binding.lineChart.invalidate()

diff --git a/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt b/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt
index 196dafa..1500877 100644
--- a/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt
+++ b/app/src/main/java/com/casic/app/safetreecontroller/extensions/LineChart.kt
@@ -18,8 +18,7 @@
     this.isScaleXEnabled = true //X轴可缩放
     this.isScaleYEnabled = false //Y轴不可缩放
     this.description.isEnabled = false
-    this.extraTopOffset = 5f //顶部边距
-    this.extraBottomOffset = 5f //底部边距
+    this.extraBottomOffset = 10f //底部边距
     //去掉图例
     this.legend.isEnabled = false
     this.animateY(1200, Easing.EaseInOutQuad)
diff --git a/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt b/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt
index edf390b..353cce4 100644
--- a/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt
+++ b/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt
@@ -124,6 +124,11 @@
                 dataSet.values = strengthEntries
                 lineDataSets.add(dataSet)
                 val lineData = LineData(lineDataSets)
+                //最多显示10min的实时数据，旧的数据删除，优化卡顿问题
+                if (lineData.entryCount > 200) {
+                    lineData.removeDataSet(0)
+                    lineData.notifyDataChanged()
+                }
                 lineData.setDrawValues(false)
                 binding.lineChart.data = lineData
                 binding.lineChart.invalidate()
diff --git a/app/src/main/java/com/casic/app/safetreecontroller/service/SocketConnectionService.kt b/app/src/main/java/com/casic/app/safetreecontroller/service/SocketConnectionService.kt
index f702c79..f12f7fa 100644
--- a/app/src/main/java/com/casic/app/safetreecontroller/service/SocketConnectionService.kt
+++ b/app/src/main/java/com/casic/app/safetreecontroller/service/SocketConnectionService.kt
@@ -55,8 +55,8 @@
     private val methaneRunnable = object : Runnable {
         override fun run() {
             tcpClient.sendMessage(CommandCreator.createMethaneCommand())
-            // 每5s重复一次
-            weakReferenceHandler?.postDelayed(this, 5 * 1000L)
+            // 每3s重复一次
+            weakReferenceHandler?.postDelayed(this, 3 * 1000L)
         }
     }