diff --git a/DentistryHandpieces/MainWindow.xaml b/DentistryHandpieces/MainWindow.xaml
index 8ceab88..a0ff208 100644
--- a/DentistryHandpieces/MainWindow.xaml
+++ b/DentistryHandpieces/MainWindow.xaml
@@ -692,7 +692,8 @@
                                 <Grid>
                                     <Grid.RowDefinitions>
                                         <RowDefinition Height="Auto" />
-                                        <RowDefinition Height="*" />
+                                        <RowDefinition Height="Auto" />
+                                        <RowDefinition Height="Auto" />
                                         <RowDefinition Height="Auto" />
                                     </Grid.RowDefinitions>
                                     <Grid>
@@ -713,11 +714,39 @@
                                     <TextBlock Grid.Row="1"
                                            x:Name="RealtimeSpeedText"
                                            Text="{Binding RealtimeSpeedText}"
-                                           Style="{StaticResource MetricValue}"
-                                           FontSize="50"
-                                           Foreground="#0F766E"
-                                           VerticalAlignment="Center" />
-                                    <Border Grid.Row="2" Style="{StaticResource InfoStrip}">
+                                               Style="{StaticResource MetricValue}"
+                                               FontSize="50"
+                                               Foreground="#0F766E"
+                                           VerticalAlignment="Center"
+                                           Margin="0,4,0,10" />
+                                    <Grid Grid.Row="2" Margin="0,2,0,10">
+                                        <Grid.RowDefinitions>
+                                            <RowDefinition Height="Auto" />
+                                            <RowDefinition Height="Auto" />
+                                        </Grid.RowDefinitions>
+                                        <Grid.ColumnDefinitions>
+                                            <ColumnDefinition Width="*" />
+                                            <ColumnDefinition Width="Auto" />
+                                        </Grid.ColumnDefinitions>
+                                        <TextBlock Text="实时扭矩" Style="{StaticResource MetricTitle}" HorizontalAlignment="Left" />
+                                        <Button Grid.Column="1"
+                                                Content="扭矩归零"
+                                                Command="{Binding ZeroTorqueCommand}"
+                                                FontSize="13"
+                                                Padding="8,3"
+                                                MinHeight="28"
+                                                Background="#64748B"
+                                                BorderBrush="#475569" />
+                                        <TextBlock Grid.Row="1"
+                                                   Grid.ColumnSpan="2"
+                                                   x:Name="RealtimeTorqueText"
+                                                   Text="{Binding RealtimeTorqueText}"
+                                                   Style="{StaticResource MetricValue}"
+                                                   FontSize="50"
+                                                   Foreground="#1D4ED8"
+                                                   Margin="0,4,0,0" />
+                                    </Grid>
+                                    <Border Grid.Row="3" Style="{StaticResource InfoStrip}">
                                         <Grid>
                                             <Grid.ColumnDefinitions>
                                                 <ColumnDefinition Width="*" />
@@ -746,61 +775,20 @@
                             <Border Grid.Column="1" Style="{StaticResource PanelBorder}" Margin="10,0,0,0">
                                 <Grid>
                                     <Grid.RowDefinitions>
-                                        <RowDefinition Height="Auto" />
-                                        <RowDefinition Height="Auto" />
                                         <RowDefinition Height="*" />
                                         <RowDefinition Height="Auto" />
+                                        <RowDefinition Height="Auto" />
                                     </Grid.RowDefinitions>
-                                    <Grid>
-                                        <Grid.ColumnDefinitions>
-                                            <ColumnDefinition Width="*" />
-                                            <ColumnDefinition Width="Auto" />
-                                        </Grid.ColumnDefinitions>
-                                        <TextBlock Text="实时扭矩" Style="{StaticResource MetricTitle}" HorizontalAlignment="Left" />
-                                        <Button Grid.Column="1"
-                                                Content="归零"
-                                                Command="{Binding ZeroTorqueCommand}"
-                                                FontSize="13"
-                                                Padding="8,3"
-                                                MinHeight="28"
-                                                Background="#64748B"
-                                                BorderBrush="#475569" />
-                                    </Grid>
+                                    <local:TorqueTrendControl Samples="{Binding TorqueSamples}"
+                                                              MinHeight="210" />
                                     <TextBlock Grid.Row="1"
-                                           x:Name="RealtimeTorqueText"
-                                           Text="{Binding RealtimeTorqueText}"
-                                           Style="{StaticResource MetricValue}"
-                                           FontSize="50"
-                                           Foreground="#1D4ED8"
-                                           Margin="0,2,0,4" />
-                                    <Grid Grid.Row="2" MinHeight="96" Margin="0,2,0,0">
-                                        <Grid>
-                                            <Grid.RowDefinitions>
-                                                <RowDefinition Height="Auto" />
-                                                <RowDefinition Height="*" />
-                                            </Grid.RowDefinitions>
-                                            <Grid Grid.Row="1">
-                                                <Grid.ColumnDefinitions>
-                                                    <ColumnDefinition Width="17*"/>
-                                                    <ColumnDefinition Width="50*"/>
-                                                </Grid.ColumnDefinitions>
-                                                <Grid.RowDefinitions>
-                                                    <RowDefinition Height="*" />
-                                                    <RowDefinition Height="Auto" />
-                                                </Grid.RowDefinitions>
-                                                <local:TorqueTrendControl Samples="{Binding TorqueSamples}"
-                                                                      MinHeight="86" Grid.ColumnSpan="2" />
-                                                <TextBlock Grid.Row="1"
-                                                       Text="{Binding TorqueCurveStatusText}"
-                                                       FontSize="14"
-                                                       FontWeight="SemiBold"
-                                                       Foreground="#52616F"
-                                                       HorizontalAlignment="Left"
-                                                       Margin="115,4,0,0" Grid.Column="1" />
-                                            </Grid>
-                                        </Grid>
-                                    </Grid>
-                                    <TextBlock Grid.Row="3"
+                                               Text="{Binding TorqueCurveStatusText}"
+                                               FontSize="14"
+                                               FontWeight="SemiBold"
+                                               Foreground="#52616F"
+                                               HorizontalAlignment="Center"
+                                               Margin="0,6,0,0" />
+                                    <TextBlock Grid.Row="2"
                                            x:Name="FinalSpeedTorqueText"
                                            Text="{Binding FinalSpeedTorqueText}"
                                            FontSize="17"
diff --git a/DentistryHandpieces/MainWindowViewModel.cs b/DentistryHandpieces/MainWindowViewModel.cs
index 96fe30f..6c5cb7c 100644
--- a/DentistryHandpieces/MainWindowViewModel.cs
+++ b/DentistryHandpieces/MainWindowViewModel.cs
@@ -101,6 +101,7 @@ public sealed class MainWindowViewModel : ObservableObject
     private const double TenthsRegisterScale = 10.0;
     private const int MaxTorqueSampleCount = 300;
     private const double MinimumTorqueChangeThreshold = 0.05;
+    private const double MinimumSpeedChangeThreshold = 1.0;
     private const string TorqueUnit = "mN.m";
     private static readonly TimeSpan RealtimeRefreshInterval = TimeSpan.FromMilliseconds(100);
     private static readonly TimeSpan RealtimeDataFreshnessTimeout = TimeSpan.FromSeconds(3);
@@ -250,7 +251,7 @@ public sealed class MainWindowViewModel : ObservableObject
     private string _speedTorquePeakTorqueText = $"0.00 {TorqueUnit}";
     private string _speedTorqueMaxDisplacementText = "0.000 mm";
     private string _speedTorqueFinalDisplacementText = "--";
-    private string _torqueCurveStatusText = "保持时间曲线：未启动";
+    private string _torqueCurveStatusText = "转速/扭矩保持时间关系曲线：未启动";
     private string _axialConfigSummaryText = "--";
     private string _speedTorqueConfigSummaryText = "--";
     private string _statusText = "完成测试后可导出报表。";
@@ -779,7 +780,8 @@ public sealed class MainWindowViewModel : ObservableObject
             _axialForce = axialForce;
             _realtimeTorque = realtimeTorque;
             _realtimeSpeed = realtimeSpeed;
-            AppendTorqueSample(GetScaledTorque(), _realtimeSpeed, DateTime.Now);
+            DateTime sampledAt = DateTime.Now;
+            AppendTorqueSample(GetScaledTorque(), _realtimeSpeed, sampledAt);
             if (_isDisplacementRunning)
             {
                 _maxDisplacement = Math.Max(_maxDisplacement, Math.Abs(_relativeDisplacement));
@@ -794,8 +796,8 @@ public sealed class MainWindowViewModel : ObservableObject
             bool isVentValveOpen = ReadCoilValue(coilValues, VentValveCoil);
             VentValveButtonText = isVentValveOpen ? "关闭气阀" : "通气阀";
 
-            _lastSuccessfulRealtimeReadAt = DateTime.Now;
-            CaptureRealtimeSample(dialIndicator, coilValues);
+            _lastSuccessfulRealtimeReadAt = sampledAt;
+            CaptureRealtimeSample(dialIndicator, coilValues, sampledAt);
             FinalizeNoLoadSpeedRunIfDue();
             QueueSnapshotIfDue();
 
@@ -1360,11 +1362,17 @@ public sealed class MainWindowViewModel : ObservableObject
                 CreateRecordPoint("转速/扭矩实时测试", "最终位移", finalDisplacement.HasValue ? $"{FormatDisplacement(finalDisplacement.Value)} mm" : "--", "mm", finalDisplacement.HasValue ? "记录" : "待停止"),
                 CreateRecordPoint("转速/扭矩实时测试", "最终转速", finalSpeed.HasValue ? $"{FormatSpeed(finalSpeed.Value)} r/min" : "--", "r/min", finalSpeed.HasValue ? "记录" : "待停止"),
                 CreateRecordPoint("转速/扭矩实时测试", "最终扭矩", finalTorque.HasValue ? $"{FormatTorque(finalTorque.Value)} {TorqueUnit}" : "--", TorqueUnit, finalTorque.HasValue ? "记录" : "待停止"),
-                CreateRecordPoint("转速/扭矩实时测试", "保持时间曲线判定", curve.Result, string.Empty, "记录"),
+                CreateRecordPoint("转速/扭矩实时测试", "转速/扭矩保持时间关系曲线判定", curve.Result, string.Empty, "记录"),
+                CreateRecordPoint("转速/扭矩实时测试", "扭矩变化阈值", $"{FormatTorque(curve.ChangeThresholdMilliNewtonMeters)} {TorqueUnit}", TorqueUnit),
+                CreateRecordPoint("转速/扭矩实时测试", "转速变化阈值", $"{FormatSpeed(curve.SpeedChangeThresholdRpm)} r/min", "r/min"),
                 CreateRecordPoint("转速/扭矩实时测试", "保持时间内最小扭矩", curve.Samples.Count >= 2 ? $"{FormatTorque(curve.MinTorqueMilliNewtonMeters)} {TorqueUnit}" : "--", TorqueUnit),
                 CreateRecordPoint("转速/扭矩实时测试", "保持时间内最大扭矩", curve.Samples.Count >= 2 ? $"{FormatTorque(curve.MaxTorqueMilliNewtonMeters)} {TorqueUnit}" : "--", TorqueUnit),
                 CreateRecordPoint("转速/扭矩实时测试", "保持时间内平均扭矩", curve.Samples.Count >= 2 ? $"{FormatTorque(curve.AverageTorqueMilliNewtonMeters)} {TorqueUnit}" : "--", TorqueUnit),
-                CreateRecordPoint("转速/扭矩实时测试", "保持时间内波动值", curve.Samples.Count >= 2 ? $"{FormatTorque(curve.FluctuationMilliNewtonMeters)} {TorqueUnit}" : "--", TorqueUnit)
+                CreateRecordPoint("转速/扭矩实时测试", "保持时间内扭矩波动值", curve.Samples.Count >= 2 ? $"{FormatTorque(curve.FluctuationMilliNewtonMeters)} {TorqueUnit}" : "--", TorqueUnit),
+                CreateRecordPoint("转速/扭矩实时测试", "保持时间内最小转速", curve.Samples.Count >= 2 ? $"{FormatSpeed(curve.MinSpeedRpm)} r/min" : "--", "r/min"),
+                CreateRecordPoint("转速/扭矩实时测试", "保持时间内最大转速", curve.Samples.Count >= 2 ? $"{FormatSpeed(curve.MaxSpeedRpm)} r/min" : "--", "r/min"),
+                CreateRecordPoint("转速/扭矩实时测试", "保持时间内平均转速", curve.Samples.Count >= 2 ? $"{FormatSpeed(curve.AverageSpeedRpm)} r/min" : "--", "r/min"),
+                CreateRecordPoint("转速/扭矩实时测试", "保持时间内转速波动值", curve.Samples.Count >= 2 ? $"{FormatSpeed(curve.SpeedFluctuationRpm)} r/min" : "--", "r/min")
             ]
         };
     }
@@ -1783,13 +1791,13 @@ public sealed class MainWindowViewModel : ObservableObject
             return;
         }
 
-        var sheet = workbook.Worksheets.Add("扭矩曲线");
-        sheet.Cell(1, 1).Value = "扭矩保持时间曲线";
-        sheet.Range(1, 1, 1, 7).Merge().Style.Font.SetBold().Font.SetFontSize(16);
+        var sheet = workbook.Worksheets.Add("转速扭矩曲线");
+        sheet.Cell(1, 1).Value = "转速/扭矩保持时间关系曲线";
+        sheet.Range(1, 1, 1, 12).Merge().Style.Font.SetBold().Font.SetFontSize(16);
 
         sheet.Cell(3, 1).Value = "保持时间(s)";
         sheet.Cell(3, 2).Value = curve.HoldTimeSeconds;
-        sheet.Cell(4, 1).Value = $"判定阈值({TorqueUnit})";
+        sheet.Cell(4, 1).Value = $"扭矩变化阈值({TorqueUnit})";
         sheet.Cell(4, 2).Value = curve.ChangeThresholdMilliNewtonMeters;
         sheet.Cell(5, 1).Value = "曲线判定";
         sheet.Cell(5, 2).Value = curve.Result;
@@ -1799,14 +1807,31 @@ public sealed class MainWindowViewModel : ObservableObject
         sheet.Cell(7, 2).Value = curve.Samples.Count >= 2 ? curve.MaxTorqueMilliNewtonMeters : string.Empty;
         sheet.Cell(8, 1).Value = $"平均扭矩({TorqueUnit})";
         sheet.Cell(8, 2).Value = curve.Samples.Count >= 2 ? curve.AverageTorqueMilliNewtonMeters : string.Empty;
-        sheet.Cell(9, 1).Value = $"波动值({TorqueUnit})";
+        sheet.Cell(9, 1).Value = $"扭矩波动值({TorqueUnit})";
         sheet.Cell(9, 2).Value = curve.Samples.Count >= 2 ? curve.FluctuationMilliNewtonMeters : string.Empty;
         sheet.Range(3, 1, 9, 1).Style.Font.SetBold();
 
+        sheet.Cell(3, 4).Value = "X轴";
+        sheet.Cell(3, 5).Value = $"扭矩({TorqueUnit})";
+        sheet.Cell(4, 4).Value = "Y轴";
+        sheet.Cell(4, 5).Value = "转速(r/min)";
+        sheet.Cell(5, 4).Value = "转速变化阈值(r/min)";
+        sheet.Cell(5, 5).Value = curve.SpeedChangeThresholdRpm;
+        sheet.Cell(6, 4).Value = "最小转速(r/min)";
+        sheet.Cell(6, 5).Value = curve.Samples.Count >= 2 ? curve.MinSpeedRpm : string.Empty;
+        sheet.Cell(7, 4).Value = "最大转速(r/min)";
+        sheet.Cell(7, 5).Value = curve.Samples.Count >= 2 ? curve.MaxSpeedRpm : string.Empty;
+        sheet.Cell(8, 4).Value = "平均转速(r/min)";
+        sheet.Cell(8, 5).Value = curve.Samples.Count >= 2 ? curve.AverageSpeedRpm : string.Empty;
+        sheet.Cell(9, 4).Value = "转速波动值(r/min)";
+        sheet.Cell(9, 5).Value = curve.Samples.Count >= 2 ? curve.SpeedFluctuationRpm : string.Empty;
+        sheet.Range(3, 4, 9, 4).Style.Font.SetBold();
+
         sheet.Cell(11, 1).Value = "时间(s)";
         sheet.Cell(11, 2).Value = $"扭矩({TorqueUnit})";
-        sheet.Range(11, 1, 11, 2).Style.Fill.SetBackgroundColor(XLColor.FromHtml("#D9EAF7"));
-        sheet.Range(11, 1, 11, 2).Style.Font.SetBold();
+        sheet.Cell(11, 3).Value = "转速(r/min)";
+        sheet.Range(11, 1, 11, 3).Style.Fill.SetBackgroundColor(XLColor.FromHtml("#D9EAF7"));
+        sheet.Range(11, 1, 11, 3).Style.Font.SetBold();
 
         for (int i = 0; i < curve.Samples.Count; i++)
         {
@@ -1814,6 +1839,7 @@ public sealed class MainWindowViewModel : ObservableObject
             int row = 12 + i;
             sheet.Cell(row, 1).Value = sample.ElapsedSeconds;
             sheet.Cell(row, 2).Value = sample.TorqueMilliNewtonMeters;
+            sheet.Cell(row, 3).Value = sample.SpeedRpm;
         }
 
         if (curve.Samples.Count > 0)
@@ -1822,19 +1848,19 @@ public sealed class MainWindowViewModel : ObservableObject
             {
                 byte[] imageBytes = CreateTorqueCurveImage(curve, 760, 360);
                 var imageStream = new MemoryStream(imageBytes);
-                var picture = sheet.AddPicture(imageStream, "TorqueCurve").MoveTo(sheet.Cell(3, 4));
+                var picture = sheet.AddPicture(imageStream, "SpeedTorqueCurve").MoveTo(sheet.Cell(3, 7));
                 picture.Width = 760;
                 picture.Height = 360;
             }
             catch (Exception ex)
             {
-                sheet.Cell(3, 4).Value = "曲线图生成失败，原始曲线数据已完整保留";
-                Log.Warning(ex, "扭矩曲线图片生成失败，报表继续保留原始曲线数据");
+                sheet.Cell(3, 7).Value = "曲线图生成失败，原始曲线数据已完整保留";
+                Log.Warning(ex, "转速/扭矩关系曲线图片生成失败，报表继续保留原始曲线数据");
             }
         }
         else
         {
-            sheet.Cell(3, 4).Value = "无扭矩曲线数据";
+            sheet.Cell(3, 7).Value = "无转速/扭矩曲线数据";
         }
 
         sheet.Columns().AdjustToContents();
@@ -1853,7 +1879,7 @@ public sealed class MainWindowViewModel : ObservableObject
             var textBrush = new SolidColorBrush(Color.FromRgb(51, 65, 85));
 
             context.DrawRectangle(background, borderPen, new Rect(0, 0, width, height));
-            DrawChartText(context, "扭矩保持时间曲线", 18, textBrush, new System.Windows.Point(22, 16), true);
+            DrawChartText(context, "转速/扭矩保持时间关系曲线", 18, textBrush, new System.Windows.Point(22, 16), true);
             DrawChartText(context, $"判定：{curve.Result}", 14, markerBrush, new System.Windows.Point(22, 44), true);
 
             Rect plot = new(62, 78, width - 92, height - 126);
@@ -1871,26 +1897,40 @@ public sealed class MainWindowViewModel : ObservableObject
 
             if (curve.Samples.Count > 0)
             {
-                double min = curve.Samples.Min(sample => sample.TorqueMilliNewtonMeters);
-                double max = curve.Samples.Max(sample => sample.TorqueMilliNewtonMeters);
-                double range = max - min;
-                if (range < 0.01)
+                double minTorque = curve.Samples.Min(sample => sample.TorqueMilliNewtonMeters);
+                double maxTorque = curve.Samples.Max(sample => sample.TorqueMilliNewtonMeters);
+                double torqueRange = maxTorque - minTorque;
+                if (torqueRange < 0.01)
                 {
-                    min -= 0.5;
-                    max += 0.5;
-                    range = 1;
+                    minTorque -= 0.5;
+                    maxTorque += 0.5;
+                    torqueRange = 1;
                 }
                 else
                 {
-                    double padding = range * 0.12;
-                    min -= padding;
-                    max += padding;
-                    range = max - min;
+                    double padding = torqueRange * 0.12;
+                    minTorque -= padding;
+                    maxTorque += padding;
+                    torqueRange = maxTorque - minTorque;
                 }
 
-                double firstElapsed = curve.Samples[0].ElapsedSeconds;
-                double lastElapsed = Math.Max(curve.Samples[^1].ElapsedSeconds, curve.HoldTimeSeconds);
-                double elapsedRange = Math.Max(lastElapsed - firstElapsed, 0.001);
+                double minSpeed = curve.Samples.Min(sample => sample.SpeedRpm);
+                double maxSpeed = curve.Samples.Max(sample => sample.SpeedRpm);
+                double speedRange = maxSpeed - minSpeed;
+                if (speedRange < 1)
+                {
+                    double padding = Math.Max(Math.Abs(minSpeed) * 0.05, 1);
+                    minSpeed -= padding;
+                    maxSpeed += padding;
+                    speedRange = maxSpeed - minSpeed;
+                }
+                else
+                {
+                    double padding = speedRange * 0.05;
+                    minSpeed -= padding;
+                    maxSpeed += padding;
+                    speedRange = maxSpeed - minSpeed;
+                }
 
                 var geometry = new StreamGeometry();
                 using (StreamGeometryContext geometryContext = geometry.Open())
@@ -1898,8 +1938,8 @@ public sealed class MainWindowViewModel : ObservableObject
                     for (int i = 0; i < curve.Samples.Count; i++)
                     {
                         TorqueSamplePayload sample = curve.Samples[i];
-                        double x = plot.Left + plot.Width * (sample.ElapsedSeconds - firstElapsed) / elapsedRange;
-                        double y = plot.Bottom - (sample.TorqueMilliNewtonMeters - min) / range * plot.Height;
+                        double x = plot.Left + plot.Width * (sample.TorqueMilliNewtonMeters - minTorque) / torqueRange;
+                        double y = plot.Bottom - (sample.SpeedRpm - minSpeed) / speedRange * plot.Height;
                         var point = new System.Windows.Point(x, y);
                         if (i == 0)
                         {
@@ -1915,15 +1955,16 @@ public sealed class MainWindowViewModel : ObservableObject
                 geometry.Freeze();
                 context.DrawGeometry(null, linePen, geometry);
 
-                DrawChartText(context, max.ToString("0.##", CultureInfo.InvariantCulture), 12, textBrush, new System.Windows.Point(16, plot.Top - 8), false);
-                DrawChartText(context, min.ToString("0.##", CultureInfo.InvariantCulture), 12, textBrush, new System.Windows.Point(16, plot.Bottom - 10), false);
-                DrawChartText(context, $"{firstElapsed:0.#}s", 12, textBrush, new System.Windows.Point(plot.Left, plot.Bottom + 10), false);
-                DrawChartText(context, $"{lastElapsed:0.#}s", 12, textBrush, new System.Windows.Point(plot.Right - 28, plot.Bottom + 10), false);
-                DrawChartText(context, TorqueUnit, 12, textBrush, new System.Windows.Point(18, plot.Top + 16), false);
+                DrawChartText(context, maxSpeed.ToString("0", CultureInfo.InvariantCulture), 12, textBrush, new System.Windows.Point(16, plot.Top - 8), false);
+                DrawChartText(context, minSpeed.ToString("0", CultureInfo.InvariantCulture), 12, textBrush, new System.Windows.Point(16, plot.Bottom - 10), false);
+                DrawChartText(context, minTorque.ToString("0.##", CultureInfo.InvariantCulture), 12, textBrush, new System.Windows.Point(plot.Left, plot.Bottom + 10), false);
+                DrawChartText(context, maxTorque.ToString("0.##", CultureInfo.InvariantCulture), 12, textBrush, new System.Windows.Point(plot.Right - 34, plot.Bottom + 10), false);
+                DrawChartText(context, "转速(r/min)", 12, textBrush, new System.Windows.Point(12, plot.Top + 16), false);
+                DrawChartText(context, $"扭矩({TorqueUnit})", 12, textBrush, new System.Windows.Point(plot.Right - 78, plot.Bottom - 18), false);
             }
             else
             {
-                DrawChartText(context, "无扭矩曲线数据", 16, textBrush, new System.Windows.Point(plot.Left + 20, plot.Top + 20), false);
+                DrawChartText(context, "无转速/扭矩曲线数据", 16, textBrush, new System.Windows.Point(plot.Left + 20, plot.Top + 20), false);
             }
         }
 
@@ -2512,7 +2553,6 @@ public sealed class MainWindowViewModel : ObservableObject
         _speedTorqueStartedAt = DateTime.Now;
         _activeSpeedTorqueRun = CreateTestRun("转速/扭矩测试", _speedTorqueStartedAt.Value);
         ClearTorqueSamples();
-        AppendTorqueSample(GetScaledTorque(), _realtimeSpeed, _speedTorqueStartedAt.Value);
         _maxSpeedTorqueDisplacement = Math.Max(_maxSpeedTorqueDisplacement, Math.Abs(_speedTorqueDisplacement));
         UpdateSpeedTorqueDisplay();
         StatusText = "转速/扭矩测试已启动，通气阀由手动按钮独立控制。";
@@ -3342,6 +3382,12 @@ public sealed class MainWindowViewModel : ObservableObject
         }
 
         double elapsedSeconds = Math.Max(0, (sampledAt - _speedTorqueStartedAt.Value).TotalSeconds);
+        if (_parameterConfig.TorqueHoldTime <= 0
+            || elapsedSeconds > _parameterConfig.TorqueHoldTime)
+        {
+            return;
+        }
+
         TorqueSamples.Add(new TorqueSamplePayload
         {
             ElapsedSeconds = elapsedSeconds,
@@ -3366,15 +3412,20 @@ public sealed class MainWindowViewModel : ObservableObject
 
     private void UpdateTorqueCurveStatus()
     {
-        if (_isSpeedTorqueRunning && TorqueSamples.Count > 0)
+        if (_isSpeedTorqueRunning
+            && _speedTorqueStartedAt.HasValue
+            && _parameterConfig.TorqueHoldTime > 0)
         {
-            double elapsed = TorqueSamples[^1].ElapsedSeconds;
-            TorqueCurveStatusText = $"实时曲线：采集中 {FormatConfigNumber(elapsed)} s；X轴转速 / Y轴扭矩";
-            return;
+            double elapsed = Math.Max(0, (DateTime.Now - _speedTorqueStartedAt.Value).TotalSeconds);
+            if (elapsed < _parameterConfig.TorqueHoldTime)
+            {
+                TorqueCurveStatusText = $"实时曲线：采集中 {FormatConfigNumber(elapsed)} / {FormatConfigNumber(_parameterConfig.TorqueHoldTime)} s；X轴扭矩 / Y轴转速";
+                return;
+            }
         }
 
         TorqueCurvePayload curve = CreateTorqueCurvePayload();
-        TorqueCurveStatusText = $"保持时间曲线：{curve.Result}";
+        TorqueCurveStatusText = $"转速/扭矩保持时间关系曲线：{curve.Result}";
     }
 
     private TorqueCurvePayload CreateTorqueCurvePayload()
@@ -3394,54 +3445,17 @@ public sealed class MainWindowViewModel : ObservableObject
             })
             .ToList();
 
-        double threshold = GetTorqueChangeThreshold();
-        if (_parameterConfig.TorqueHoldTime <= 0)
-        {
-            _cachedTorqueCurve = new TorqueCurvePayload
-            {
-                HoldTimeSeconds = _parameterConfig.TorqueHoldTime,
-                ChangeThresholdMilliNewtonMeters = threshold,
-                Result = "未设置保持时间，未判定",
-                Samples = samples
-            };
-            return _cachedTorqueCurve;
-        }
-
-        if (samples.Count < 2)
-        {
-            _cachedTorqueCurve = new TorqueCurvePayload
-            {
-                HoldTimeSeconds = _parameterConfig.TorqueHoldTime,
-                ChangeThresholdMilliNewtonMeters = threshold,
-                Result = "采样不足，未判定",
-                Samples = samples
-            };
-            return _cachedTorqueCurve;
-        }
-
-        double min = samples.Min(sample => sample.TorqueMilliNewtonMeters);
-        double max = samples.Max(sample => sample.TorqueMilliNewtonMeters);
-        double average = samples.Average(sample => sample.TorqueMilliNewtonMeters);
-        double fluctuation = max - min;
-
-        _cachedTorqueCurve = new TorqueCurvePayload
-        {
-            HoldTimeSeconds = _parameterConfig.TorqueHoldTime,
-            ChangeThresholdMilliNewtonMeters = threshold,
-            MinTorqueMilliNewtonMeters = min,
-            MaxTorqueMilliNewtonMeters = max,
-            AverageTorqueMilliNewtonMeters = average,
-            FluctuationMilliNewtonMeters = fluctuation,
-            Result = fluctuation > threshold ? "有变化" : "无明显变化",
-            Samples = samples
-        };
+        _cachedTorqueCurve = BuildTorqueCurvePayload(
+            samples,
+            _parameterConfig.TorqueHoldTime,
+            GetTorqueChangeThreshold(),
+            GetSpeedChangeThreshold());
         return _cachedTorqueCurve;
     }
 
     private static TorqueCurvePayload CreateTorqueCurvePayload(TestRunPayload run)
     {
         double holdTime = run.ParameterSnapshot.TorqueHoldTime;
-        double threshold = Math.Max(MinimumTorqueChangeThreshold, Math.Abs(run.ParameterSnapshot.HoldTorque) * 0.01);
         List<TorqueSamplePayload> samples = run.Samples
             .Select(sample => new TorqueSamplePayload
             {
@@ -3452,12 +3466,26 @@ public sealed class MainWindowViewModel : ObservableObject
             .Where(sample => sample.ElapsedSeconds <= holdTime)
             .ToList();
 
+        return BuildTorqueCurvePayload(
+            samples,
+            holdTime,
+            Math.Max(MinimumTorqueChangeThreshold, Math.Abs(run.ParameterSnapshot.HoldTorque) * 0.01),
+            Math.Max(MinimumSpeedChangeThreshold, Math.Abs(run.ParameterSnapshot.LoadSpeedSetting) * 0.01));
+    }
+
+    private static TorqueCurvePayload BuildTorqueCurvePayload(
+        List<TorqueSamplePayload> samples,
+        double holdTime,
+        double torqueThreshold,
+        double speedThreshold)
+    {
         if (holdTime <= 0)
         {
             return new TorqueCurvePayload
             {
                 HoldTimeSeconds = holdTime,
-                ChangeThresholdMilliNewtonMeters = threshold,
+                ChangeThresholdMilliNewtonMeters = torqueThreshold,
+                SpeedChangeThresholdRpm = speedThreshold,
                 Result = "未设置保持时间，未判定",
                 Samples = samples
             };
@@ -3468,23 +3496,43 @@ public sealed class MainWindowViewModel : ObservableObject
             return new TorqueCurvePayload
             {
                 HoldTimeSeconds = holdTime,
-                ChangeThresholdMilliNewtonMeters = threshold,
+                ChangeThresholdMilliNewtonMeters = torqueThreshold,
+                SpeedChangeThresholdRpm = speedThreshold,
                 Result = "采样不足，未判定",
                 Samples = samples
             };
         }
 
-        double min = samples.Min(static sample => sample.TorqueMilliNewtonMeters);
-        double max = samples.Max(static sample => sample.TorqueMilliNewtonMeters);
+        double minTorque = samples.Min(static sample => sample.TorqueMilliNewtonMeters);
+        double maxTorque = samples.Max(static sample => sample.TorqueMilliNewtonMeters);
+        double torqueFluctuation = maxTorque - minTorque;
+        double minSpeed = samples.Min(static sample => sample.SpeedRpm);
+        double maxSpeed = samples.Max(static sample => sample.SpeedRpm);
+        double speedFluctuation = maxSpeed - minSpeed;
+        bool torqueChanged = torqueFluctuation > torqueThreshold;
+        bool speedChanged = speedFluctuation > speedThreshold;
+        string result = (torqueChanged, speedChanged) switch
+        {
+            (true, true) => "有变化（扭矩、转速）",
+            (true, false) => "有变化（扭矩）",
+            (false, true) => "有变化（转速）",
+            _ => "无明显变化"
+        };
+
         return new TorqueCurvePayload
         {
             HoldTimeSeconds = holdTime,
-            ChangeThresholdMilliNewtonMeters = threshold,
-            MinTorqueMilliNewtonMeters = min,
-            MaxTorqueMilliNewtonMeters = max,
+            ChangeThresholdMilliNewtonMeters = torqueThreshold,
+            SpeedChangeThresholdRpm = speedThreshold,
+            MinTorqueMilliNewtonMeters = minTorque,
+            MaxTorqueMilliNewtonMeters = maxTorque,
             AverageTorqueMilliNewtonMeters = samples.Average(static sample => sample.TorqueMilliNewtonMeters),
-            FluctuationMilliNewtonMeters = max - min,
-            Result = max - min > threshold ? "有变化" : "无明显变化",
+            FluctuationMilliNewtonMeters = torqueFluctuation,
+            MinSpeedRpm = minSpeed,
+            MaxSpeedRpm = maxSpeed,
+            AverageSpeedRpm = samples.Average(static sample => sample.SpeedRpm),
+            SpeedFluctuationRpm = speedFluctuation,
+            Result = result,
             Samples = samples
         };
     }
@@ -3494,6 +3542,11 @@ public sealed class MainWindowViewModel : ObservableObject
         return Math.Max(MinimumTorqueChangeThreshold, Math.Abs(_parameterConfig.HoldTorque) * 0.01);
     }
 
+    private double GetSpeedChangeThreshold()
+    {
+        return Math.Max(MinimumSpeedChangeThreshold, Math.Abs(_parameterConfig.LoadSpeedSetting) * 0.01);
+    }
+
     private int GetTorqueSampleLimit()
     {
         if (_parameterConfig.TorqueHoldTime <= 0)
@@ -3506,12 +3559,15 @@ public sealed class MainWindowViewModel : ObservableObject
         return Math.Max(MaxTorqueSampleCount, requiredSamples);
     }
 
-    private void CaptureRealtimeSample(double dialIndicator, IReadOnlyDictionary<ushort, bool> coilValues)
+    private void CaptureRealtimeSample(
+        double dialIndicator,
+        IReadOnlyDictionary<ushort, bool> coilValues,
+        DateTime sampledAt)
     {
         var sample = new RealtimeSamplePayload
         {
             Sequence = ++_realtimeSampleSequence,
-            SampledAt = DateTime.Now,
+            SampledAt = sampledAt,
             DialIndicatorMm = dialIndicator,
             RelativeDisplacementMm = _relativeDisplacement,
             AxialAxisPositionMm = _axialAxisPosition,
diff --git a/DentistryHandpieces/Models.cs b/DentistryHandpieces/Models.cs
index 35bbe86..a9b0624 100644
--- a/DentistryHandpieces/Models.cs
+++ b/DentistryHandpieces/Models.cs
@@ -214,6 +214,8 @@ public sealed class TorqueCurvePayload
 
     public double ChangeThresholdMilliNewtonMeters { get; init; }
 
+    public double SpeedChangeThresholdRpm { get; init; }
+
     public double MinTorqueMilliNewtonMeters { get; init; }
 
     public double MaxTorqueMilliNewtonMeters { get; init; }
@@ -222,6 +224,14 @@ public sealed class TorqueCurvePayload
 
     public double FluctuationMilliNewtonMeters { get; init; }
 
+    public double MinSpeedRpm { get; init; }
+
+    public double MaxSpeedRpm { get; init; }
+
+    public double AverageSpeedRpm { get; init; }
+
+    public double SpeedFluctuationRpm { get; init; }
+
     public string Result { get; init; } = string.Empty;
 
     public List<TorqueSamplePayload> Samples { get; init; } = [];
diff --git a/DentistryHandpieces/TorqueTrendControl.cs b/DentistryHandpieces/TorqueTrendControl.cs
index cf1e559..46e459e 100644
--- a/DentistryHandpieces/TorqueTrendControl.cs
+++ b/DentistryHandpieces/TorqueTrendControl.cs
@@ -65,8 +65,8 @@ public sealed class TorqueTrendControl : FrameworkElement
         if (samples.Count == 0)
         {
             DrawText(drawingContext, "等待转速/扭矩数据", 15, Color.FromRgb(82, 97, 111), new Point(plot.Left + 8, plot.Top + 8));
-            DrawText(drawingContext, $"扭矩 ({TorqueUnit})", 12, Color.FromRgb(82, 97, 111), new Point(6, plot.Top));
-            DrawText(drawingContext, $"转速 ({SpeedUnit})", 12, Color.FromRgb(82, 97, 111), new Point(plot.Right - 82, plot.Bottom + 5));
+            DrawText(drawingContext, $"转速 ({SpeedUnit})", 12, Color.FromRgb(82, 97, 111), new Point(6, plot.Top));
+            DrawText(drawingContext, $"扭矩 ({TorqueUnit})", 12, Color.FromRgb(82, 97, 111), new Point(plot.Right - 82, plot.Bottom + 5));
             return;
         }
 
@@ -107,20 +107,20 @@ public sealed class TorqueTrendControl : FrameworkElement
             speedRange = maxSpeed - minSpeed;
         }
 
-        DrawText(drawingContext, maxTorque.ToString("0.##", CultureInfo.InvariantCulture), 12, Color.FromRgb(82, 97, 111), new Point(8, plot.Top - 2));
-        DrawText(drawingContext, minTorque.ToString("0.##", CultureInfo.InvariantCulture), 12, Color.FromRgb(82, 97, 111), new Point(8, plot.Bottom - 14));
-        DrawText(drawingContext, minSpeed.ToString("0", CultureInfo.InvariantCulture), 12, Color.FromRgb(82, 97, 111), new Point(plot.Left, plot.Bottom + 5));
-        DrawText(drawingContext, maxSpeed.ToString("0", CultureInfo.InvariantCulture), 12, Color.FromRgb(82, 97, 111), new Point(plot.Right - 38, plot.Bottom + 5));
-        DrawText(drawingContext, $"扭矩 ({TorqueUnit})", 11, Color.FromRgb(82, 97, 111), new Point(plot.Left + 4, plot.Top + 3));
-        DrawText(drawingContext, $"转速 ({SpeedUnit})", 11, Color.FromRgb(82, 97, 111), new Point(plot.Right - 82, plot.Bottom - 18));
+        DrawText(drawingContext, maxSpeed.ToString("0", CultureInfo.InvariantCulture), 12, Color.FromRgb(82, 97, 111), new Point(8, plot.Top - 2));
+        DrawText(drawingContext, minSpeed.ToString("0", CultureInfo.InvariantCulture), 12, Color.FromRgb(82, 97, 111), new Point(8, plot.Bottom - 14));
+        DrawText(drawingContext, minTorque.ToString("0.##", CultureInfo.InvariantCulture), 12, Color.FromRgb(82, 97, 111), new Point(plot.Left, plot.Bottom + 5));
+        DrawText(drawingContext, maxTorque.ToString("0.##", CultureInfo.InvariantCulture), 12, Color.FromRgb(82, 97, 111), new Point(plot.Right - 38, plot.Bottom + 5));
+        DrawText(drawingContext, $"转速 ({SpeedUnit})", 11, Color.FromRgb(82, 97, 111), new Point(plot.Left + 4, plot.Top + 3));
+        DrawText(drawingContext, $"扭矩 ({TorqueUnit})", 11, Color.FromRgb(82, 97, 111), new Point(plot.Right - 82, plot.Bottom - 18));
 
         var geometry = new StreamGeometry();
         using (StreamGeometryContext context = geometry.Open())
         {
             for (int i = 0; i < samples.Count; i++)
             {
-                double x = plot.Left + plot.Width * (samples[i].SpeedRpm - minSpeed) / speedRange;
-                double y = plot.Bottom - (samples[i].TorqueMilliNewtonMeters - minTorque) / torqueRange * plot.Height;
+                double x = plot.Left + plot.Width * (samples[i].TorqueMilliNewtonMeters - minTorque) / torqueRange;
+                double y = plot.Bottom - (samples[i].SpeedRpm - minSpeed) / speedRange * plot.Height;
                 Point point = new(x, y);
 
                 if (i == 0)
@@ -139,7 +139,7 @@ public sealed class TorqueTrendControl : FrameworkElement
         drawingContext.DrawGeometry(null, linePen, geometry);
 
         TorqueSamplePayload current = samples[^1];
-        double currentY = plot.Bottom - (current.TorqueMilliNewtonMeters - minTorque) / torqueRange * plot.Height;
+        double currentY = plot.Bottom - (current.SpeedRpm - minSpeed) / speedRange * plot.Height;
         var currentPen = new Pen(new SolidColorBrush(Color.FromRgb(15, 118, 110)), 1.2);
         drawingContext.DrawLine(currentPen, new Point(plot.Left, currentY), new Point(plot.Right, currentY));
         DrawText(