Models/AppConfig.cs

@@ -68,8 +68,11 @@ public class TestParameters
 
 
 
-    public double FitStartTime { get; set; } = 0.01;   // 默认0.35秒，避开早期扰动
-    public double FitEndTime { get; set; } = 0.3;
+    //public double FitStartTime { get; set; } = 0.01; // 默认0.35秒，避开早期扰动
+    //public double FitEndTime { get; set; } = 0.1;
+
+    public double FitStartTime { get; set; } = 0.20; // 默认0.35秒，避开早期扰动
+    public double FitEndTime { get; set; } = 0.60;
 
 
 
@@ -89,6 +92,6 @@ public class CalibrationCoefficients
     public ushort TemperatureCoefficient { get; set; }
     public ushort ResistanceCoefficient { get; set; }
 
-    public double ThermalConductivityCorrection { get; set; } = 0.606;
+    public double ThermalConductivityCorrection { get; set; } = 36.8;
     public double ThermalDiffusivityCorrection { get; set; } = 19.9;
 }

ViewModels/D7896ViewModel.cs

@@ -90,9 +90,8 @@ public partial class D7896ViewModel : ObservableObject
 
     private const double EulerGamma = 0.5772156649;   // 欧拉常数
     //private const double WireRadius = 0.00003;        // 铂丝半径 (0.03 mm)
-    private const double WireRadius = 0.00010;        // 铂丝半径 (0.03 mm)
     [ObservableProperty] private double _sampleDensity = 1000.0;   // 新增，密度默认值1000 kg/m³（水）
-    int samples = 1000; // 1秒 * 1000点/秒
+    int samples = 800; // 1秒 * 1000点/秒
     double heatingDuration = 1;        // 加热时间 0.8 秒（需与您的加热脉冲宽度一致）
     double totalDuration = 2;            // 总采样时间（加热 + 冷却）
     public D7896ViewModel()
@@ -343,8 +342,8 @@ public partial class D7896ViewModel : ObservableObject
                 if (dynamicR0 == 2.45) // 仍为默认值，说明基线无效
                 {
                     double sumR0 = 0; int cnt = 0;
-                    // 改用第 10 到 19 点（共10个点），避开前10个点的干扰
-                    for (int j = 10; j < Math.Min(20, ustd.Length); j++)
+                    // 改用第 2~5 点（索引 2,3,4,5）
+                    for (int j = 2; j < Math.Min(6, ustd.Length); j++)
                     {
                         if (ustd[j] > 0.01 && upt[j] > 0.01)
                         {
@@ -355,7 +354,7 @@ public partial class D7896ViewModel : ObservableObject
                     if (cnt > 0)
                     {
                         dynamicR0 = sumR0 / cnt;
-                        Logger.Log($"使用加热段第10~19点计算 R0 = {dynamicR0:F6} Ω");
+                        Logger.Log($"使用加热段第2~5点计算 R0 = {dynamicR0:F6} Ω");
                     }
                 }
 
@@ -409,7 +408,7 @@ public partial class D7896ViewModel : ObservableObject
 
                 if (i < _config.TestParameters.MeasurementCount && !_stopRequested)
                 {
-                    try { await Task.Delay(_config.TestParameters.IntervalSeconds * 1000, _testCts.Token); } catch (OperationCanceledException) { break; }
+                    try { await Task.Delay(_config.TestParameters.IntervalSeconds * 500, _testCts.Token); } catch (OperationCanceledException) { break; }
                 }
             }
 
@@ -550,7 +549,9 @@ public partial class D7896ViewModel : ObservableObject
         // 计算热扩散率
         double exponent = intercept / slope + EulerGamma;
         if (exponent > 30) exponent = 30;
-        double alpha = (WireRadius * WireRadius / 4.0) * Math.Exp(exponent);
+        double alpha = (_config.TestParameters.PlatinumWireDiameter / 2 * _config.TestParameters.PlatinumWireDiameter / 2 / 4.0) * Math.Exp(exponent);
+
+        alpha *= _config.TestParameters.CalibrationCoefficients.ThermalConductivityCorrection;
         if (_config.TestParameters.UseFixedAlpha)
         {
             alpha = _config.TestParameters.FixedAlpha;
@@ -635,7 +636,7 @@ public partial class D7896ViewModel : ObservableObject
         for (int i = 0; i < n; i++)
         {
             bool inFit = (i >= fitStart && i <= fitEnd);
-            sw.WriteLine($"{i},{time[i]:F6},{ustd[i]:F6},{upt[i]:F6},{(double.IsNaN(deltaT[i])?0:deltaT[i]):F6},{(inFit?1:0)}");
+            sw.WriteLine($"{i},{time[i]:F6},{ustd[i]:F6},{upt[i]:F6},{(double.IsNaN(deltaT[i]) ? 0 : deltaT[i]):F6},{(inFit ? 1 : 0)}");
         }
     }
 

appsettings.json

@@ -25,9 +25,10 @@
   "TestParameters": {
     "MeasurementCount": 10,
     "IntervalSeconds": 30,
-    //"PlatinumWireLength": 0.056, //铂丝长度（单位：米）
-    "PlatinumWireLength": 0.41, //铂丝长度（单位：米）
-    "PlatinumWireDiameter": 0.000025,
+    "PlatinumWireLength": 0.1250, //铂丝长度（单位：米）
+    "PlatinumWireDiameter": 0.00006,
+    //"PlatinumWireLength": 0.41, //铂丝长度（单位：米）
+    //"PlatinumWireDiameter": 0.00021,
     "ReportOutputPath": "Reports\\",
     "DefaultSampleVolume": 40.0,
     "DefaultPressure": 0.0,