feat(analysis): 添加Excel报告导出功能

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/Gpulse.WCT.DataAnalyzer.Core/Application/Analysis/PlossAnalysisService.cs

@@ -12,13 +12,171 @@ public class PlossAnalysisService
 {
     private readonly PlossParser _plossParser;
 
+    /// <summary>
+    /// 功率段列表 (与模板一致)
+    /// </summary>
+    private static readonly int[] PowerSegments = [350, 500, 750, 1000, 1250, 1500, 1750, 2000, 2250];
+
+    /// <summary>
+    /// 标定偏移值 a（按功率段）
+    /// 标定Δp = 理论Δp最大值 + a
+    /// </summary>
+    private static readonly Dictionary<int, int> CalibrationOffsetByPower = new()
+    {
+        { 350, 3000 },
+        { 500, 1000 },
+        { 750, 1200 },
+        { 1000, 1500 },
+        { 1250, 1500 },
+        { 1500, 2000 },
+        { 1750, 2500 },
+        { 2000, 2500 },
+        { 2250, 3000 }
+    };
+
     public PlossAnalysisService(PlossParser plossParser)
     {
         _plossParser = plossParser;
     }
 
     /// <summary>
-    /// 分析单个 Ploss 日志文件
+    /// 分析单个 Ploss 日志文件（生成 Excel 报告）
+    /// </summary>
+    public async Task<PlossExcelReport> AnalyzeForExcelAsync(string filePath)
+    {
+        var fileInfo = new FileInfo(filePath);
+
+        if (!fileInfo.Exists)
+        {
+            return new PlossExcelReport(
+                FileName: fileInfo.Name,
+                StatisticsByPowerSegment: new Dictionary<int, PlossPowerSegmentStatistics>(),
+                TotalCount: 0,
+                DroppedCount: 0,
+                ErrorCount: 0,
+                ErrorMessage: "文件不存在"
+            );
+        }
+
+        var lines = await File.ReadAllLinesAsync(filePath);
+        var records = new List<PlossRecord>();
+        int errorCount = 0;
+
+        // 用于暂存两行格式的 header 行
+        string? pendingHeaderLine = null;
+
+        for (int i = 0; i < lines.Length; i++)
+        {
+            var line = lines[i].Trim();
+            if (string.IsNullOrEmpty(line)) continue;
+
+            if (_plossParser.IsMultiLineStart(line))
+            {
+                pendingHeaderLine = line;
+            }
+            else if (_plossParser.CanParse(line))
+            {
+                if (pendingHeaderLine != null)
+                {
+                    // 两行格式：合并解析
+                    var result = _plossParser.ParseMultiLine(
+                        new[] { pendingHeaderLine, line }, Guid.Empty);
+
+                    if (result is { IsSuccess: true } && result.Record != null)
+                        records.Add(result.Record);
+                    else
+                        errorCount++;
+
+                    pendingHeaderLine = null;
+                }
+                else
+                {
+                    // 缺少 header 行，记录错误
+                    errorCount++;
+                }
+            }
+        }
+
+        // 处理末尾遗留的 header 行（异常情况）
+        if (pendingHeaderLine != null)
+        {
+            errorCount++;
+        }
+
+        // 按 Field10（功率段）分组并计算统计
+        // 口径：实体语义 Field9=ploss、Field10=threshold；真实日志中 threshold 值恰为功率档位 (350/500/…)，故按 Field10 分桶。
+        var matched = records.Where(r => PowerSegments.Contains(r.Field10)).ToList();
+        int droppedCount = records.Count - matched.Count;
+
+        var statisticsByPowerSegment = matched
+            .GroupBy(r => r.Field10)
+            .ToDictionary(
+                g => g.Key,
+                g => CalculateStatistics(g.ToList())
+            );
+
+        return new PlossExcelReport(
+            FileName: fileInfo.Name,
+            StatisticsByPowerSegment: statisticsByPowerSegment,
+            TotalCount: records.Count,
+            DroppedCount: droppedCount,
+            ErrorCount: errorCount,
+            ErrorMessage: null
+        );
+    }
+
+    /// <summary>
+    /// 计算单个功率段的统计值
+    /// </summary>
+    private static PlossPowerSegmentStatistics CalculateStatistics(List<PlossRecord> records)
+    {
+        // 理论Δp = Field5 - (Field4 + PowLoss + Field9)（恒等式 delta_p = Tx − Rx − pow_loss − Ploss）
+        // 用 long 计算，避免大字段值 int 溢出；PowLoss 仅两行格式有。
+        // TheoreticalDeltaPs 与 Vpas 必须同源同长，导出器按行配对写，否则行错位。
+        var usable = records.Where(r => r.PowLoss.HasValue).ToList();
+        var theoreticalDeltaPs = usable
+            .Select(r => (long)r.Field5 - ((long)r.Field4 + r.PowLoss!.Value + r.Field9))
+            .ToList();
+        var vpas = usable.Select(r => r.Field7).ToList();
+
+        int powerSegment = records[0].Field10;
+        long max = theoreticalDeltaPs.Count > 0 ? theoreticalDeltaPs.Max() : 0;
+        long min = theoreticalDeltaPs.Count > 0 ? theoreticalDeltaPs.Min() : 0;
+        double avg = theoreticalDeltaPs.Count > 0 ? theoreticalDeltaPs.Average() : 0;
+        long median = CalculateMedian(theoreticalDeltaPs);
+
+        // 标定值 = 理论Δp最大值 + a
+        int calibrationOffset = CalibrationOffsetByPower.GetValueOrDefault(powerSegment, 0);
+        long calibrationValue = max + calibrationOffset;
+
+        return new PlossPowerSegmentStatistics(
+            PowerSegment: powerSegment,
+            TheoreticalDeltaPs: theoreticalDeltaPs,
+            Vpas: vpas,
+            Max: max,
+            Min: min,
+            Avg: avg,
+            Median: median,
+            CalibrationValue: calibrationValue
+        );
+    }
+
+    /// <summary>
+    /// 计算中位数
+    /// </summary>
+    private static long CalculateMedian(List<long> values)
+    {
+        if (values.Count == 0) return 0;
+
+        var sorted = values.OrderBy(v => v).ToList();
+        int mid = sorted.Count / 2;
+        return sorted.Count % 2 == 0
+            ? (sorted[mid - 1] + sorted[mid]) / 2
+            : sorted[mid];
+    }
+
+    /// <summary>
+    /// 分析单个 Ploss 日志文件（原始控制台输出）
     /// </summary>
     public async Task<PlossAnalysisReport> AnalyzeFileAsync(string filePath)
     {
@@ -48,7 +206,7 @@ public class PlossAnalysisService
         var rows = new List<PlossRowReport>();
         int errorCount = 0;
 
-        // 用于暂存两行格式的 header 行（与 ParseService 相同的合并逻辑）
+        // 用于暂存两行格式的 header 行
         string? pendingHeaderLine = null;
         int pendingHeaderLineNumber = 0;
 
@@ -81,12 +239,8 @@ public class PlossAnalysisService
                 }
                 else
                 {
-                    // 单行格式（旧格式兼容）
-                    var result = _plossParser.Parse(line, Guid.Empty);
-                    if (result.IsSuccess && result.Record != null)
-                        rows.Add(BuildRow(lineNumber, result.Record));
-                    else
-                        errorCount++;
+                    // 缺少 header 行，记录错误
+                    errorCount++;
                 }
             }
         }

src/Gpulse.WCT.DataAnalyzer.Core/Application/Analysis/PlossExcelReport.cs

@@ -0,0 +1,44 @@
+namespace Gpulse.WCT.DataAnalyzer.Core.Application.Analysis;
+
+/// <summary>
+/// Ploss 功率段统计
+/// </summary>
+/// <param name="PowerSegment">功率档位 (350/500/750/1000/1250/1500/1750/2000/2250)</param>
+/// <param name="TheoreticalDeltaPs">理论Δp列表（long，避免大字段值溢出）</param>
+/// <param name="Vpas">VPA列表 (Field7)，与 TheoreticalDeltaPs 同源同长</param>
+/// <param name="Max">理论Δp最大值</param>
+/// <param name="Min">理论Δp最小值</param>
+/// <param name="Avg">理论Δp平均值</param>
+/// <param name="Median">理论Δp中位数</param>
+/// <param name="CalibrationValue">标定Δp值 = Max + a（按功率段查表）</param>
+public record PlossPowerSegmentStatistics(
+    int PowerSegment,
+    IReadOnlyList<long> TheoreticalDeltaPs,
+    IReadOnlyList<int> Vpas,
+    long Max,
+    long Min,
+    double Avg,
+    long Median,
+    long CalibrationValue
+);
+
+/// <summary>
+/// Ploss Excel 报告
+/// </summary>
+/// <param name="FileName">输入文件名</param>
+/// <param name="StatisticsByPowerSegment">按功率段分组的统计</param>
+/// <param name="TotalCount">总记录数</param>
+/// <param name="DroppedCount">不在 9 个标准功率段内的记录数（Field10 非档位）</param>
+/// <param name="ErrorCount">解析错误数</param>
+/// <param name="ErrorMessage">错误信息</param>
+public record PlossExcelReport(
+    string FileName,
+    IReadOnlyDictionary<int, PlossPowerSegmentStatistics> StatisticsByPowerSegment,
+    int TotalCount,
+    int DroppedCount,
+    int ErrorCount,
+    string? ErrorMessage
+)
+{
+    public bool IsSuccess => ErrorMessage == null;
+}

src/Gpulse.WCT.DataAnalyzer.Core/Application/Analysis/QfodCalibrationService.cs

@@ -1,4 +1,5 @@
 using Gpulse.WCT.DataAnalyzer.Core.Application.Parsing;
+using Gpulse.WCT.DataAnalyzer.Core.Domain.Local;
 
 namespace Gpulse.WCT.DataAnalyzer.Core.Application.Analysis;
 
@@ -17,7 +18,140 @@ public class QfodCalibrationService
     }
 
     /// <summary>
-    /// 计算标定 ΔQ 阈值
+    /// 计算标定 ΔQ 阈值（生成 Excel 报告）
+    /// </summary>
+    /// <param name="pureFile">纯手机充电日志文件</param>
+    /// <param name="foreignFile">手机+异物充电日志文件</param>
+    public async Task<QfodExcelReport> CalibrateForExcelAsync(string pureFile, string foreignFile)
+    {
+        var pureRecords = await ReadRecordsAsync(pureFile);
+        var foreignRecords = await ReadRecordsAsync(foreignFile);
+
+        if (pureRecords.ErrorMessage != null)
+            return new QfodExcelReport(
+                Path.GetFileName(pureFile), Path.GetFileName(foreignFile),
+                new Dictionary<byte, QfodCoilStatistics>(),
+                0, pureRecords.ErrorMessage);
+
+        if (foreignRecords.ErrorMessage != null)
+            return new QfodExcelReport(
+                Path.GetFileName(pureFile), Path.GetFileName(foreignFile),
+                new Dictionary<byte, QfodCoilStatistics>(),
+                0, foreignRecords.ErrorMessage);
+
+        // 空记录守卫：日志文件存在但未提取到 Qfod 行时，不能从 0 起算阈值却标记成功
+        if (pureRecords.Records.Count == 0 || foreignRecords.Records.Count == 0)
+            return new QfodExcelReport(
+                Path.GetFileName(pureFile), Path.GetFileName(foreignFile),
+                new Dictionary<byte, QfodCoilStatistics>(),
+                0, "日志文件中未提取到 Qfod 数据");
+
+        // 按线圈分组统计（仅纯手机；Qfod 输出模板无异物块，异物文件仅用于阈值计算）
+        var pureByCoil = pureRecords.Records
+            .GroupBy(r => r.CoilIndex)
+            .ToDictionary(g => g.Key, g => CalculateCoilStatistics(g.ToList()));
+
+        // 计算阈值（使用所有纯手机和异物的 DeltaQ；有符号 ΔQ，见使用指南示例 Threshold=-22）
+        int pureMax = pureRecords.Records.Max(r => r.DeltaQ);
+        int foreignMin = foreignRecords.Records.Min(r => r.DeltaQ);
+        int threshold = (pureMax + foreignMin) / 2;
+
+        return new QfodExcelReport(
+            PureFileName: Path.GetFileName(pureFile),
+            ForeignFileName: Path.GetFileName(foreignFile),
+            PureStatisticsByCoil: pureByCoil,
+            Threshold: threshold,
+            ErrorMessage: null
+        );
+    }
+
+    /// <summary>
+    /// 计算单线圈统计
+    /// 注意：DeltaQ 统计使用绝对值
+    /// </summary>
+    private static QfodCoilStatistics CalculateCoilStatistics(List<QfodRecord> records)
+    {
+        // DeltaQ 取绝对值统计
+        var deltaQs = records.Select(r => Math.Abs(r.DeltaQ)).ToList();
+        var currentQs = records.Select(r => r.CurrentQ).ToList();
+        var calibratedQs = records.Select(r => r.RawQ).ToList();
+
+        return new QfodCoilStatistics(
+            CoilIndex: records[0].CoilIndex,
+            DeltaQs: deltaQs,
+            CurrentQs: currentQs,
+            CalibratedQs: calibratedQs,
+            MaxDeltaQ: deltaQs.Count > 0 ? deltaQs.Max() : 0,
+            MinDeltaQ: deltaQs.Count > 0 ? deltaQs.Min() : 0,
+            AvgDeltaQ: deltaQs.Count > 0 ? deltaQs.Average() : 0,
+            MedianDeltaQ: CalculateMedian(deltaQs),
+            MaxCurrentQ: currentQs.Count > 0 ? currentQs.Max() : 0,
+            MinCurrentQ: currentQs.Count > 0 ? currentQs.Min() : 0,
+            AvgCurrentQ: currentQs.Count > 0 ? currentQs.Average() : 0,
+            MedianCurrentQ: CalculateMedianFloat(currentQs)
+        );
+    }
+
+    /// <summary>
+    /// 计算整数中位数
+    /// </summary>
+    private static int CalculateMedian(List<int> values)
+    {
+        if (values.Count == 0) return 0;
+
+        var sorted = values.OrderBy(v => v).ToList();
+        int mid = sorted.Count / 2;
+        return sorted.Count % 2 == 0
+            ? (sorted[mid - 1] + sorted[mid]) / 2
+            : sorted[mid];
+    }
+
+    /// <summary>
+    /// 计算浮点数中位数
+    /// </summary>
+    private static float CalculateMedianFloat(List<float> values)
+    {
+        if (values.Count == 0) return 0;
+
+        var sorted = values.OrderBy(v => v).ToList();
+        int mid = sorted.Count / 2;
+        return sorted.Count % 2 == 0
+            ? (sorted[mid - 1] + sorted[mid]) / 2f
+            : sorted[mid];
+    }
+
+    /// <summary>
+    /// 读取日志文件中的所有 Qfod 记录
+    /// </summary>
+    private async Task<(List<QfodRecord> Records, string? ErrorMessage)> ReadRecordsAsync(string filePath)
+    {
+        var fileInfo = new FileInfo(filePath);
+
+        if (!fileInfo.Exists)
+        {
+            return (new List<QfodRecord>(), $"文件不存在: {filePath}");
+        }
+
+        var records = new List<QfodRecord>();
+        var lines = await File.ReadAllLinesAsync(filePath);
+
+        foreach (var line in lines)
+        {
+            var trimmed = line.Trim();
+            if (string.IsNullOrEmpty(trimmed)) continue;
+
+            if (!_qfodParser.CanParse(trimmed)) continue;
+
+            var result = _qfodParser.Parse(trimmed, Guid.Empty);
+            if (result.IsSuccess && result.Record != null)
+                records.Add(result.Record);
+        }
+
+        return (records, null);
+    }
+
+    /// <summary>
+    /// 计算标定 ΔQ 阈值（原始控制台输出）
     /// </summary>
     /// <param name="pureFile">纯手机充电日志文件</param>
     /// <param name="foreignFile">手机+异物充电日志文件</param>

src/Gpulse.WCT.DataAnalyzer.Core/Application/Analysis/QfodExcelReport.cs

@@ -0,0 +1,50 @@
+namespace Gpulse.WCT.DataAnalyzer.Core.Application.Analysis;
+
+/// <summary>
+/// 单线圈 Qfod 统计
+/// </summary>
+/// <param name="CoilIndex">线圈索引 (0/1/2 对应 Q0/Q1/Q2)</param>
+/// <param name="DeltaQs">ΔQ绝对值列表</param>
+/// <param name="CurrentQs">Q实际值列表 (CurrentQ)</param>
+/// <param name="CalibratedQs">Q校准值列表 (RawQ)</param>
+/// <param name="MaxDeltaQ">ΔQ绝对值最大值</param>
+/// <param name="MinDeltaQ">ΔQ绝对值最小值</param>
+/// <param name="AvgDeltaQ">ΔQ绝对值平均值</param>
+/// <param name="MedianDeltaQ">ΔQ绝对值中位数</param>
+/// <param name="MaxCurrentQ">Q实际值最大值</param>
+/// <param name="MinCurrentQ">Q实际值最小值</param>
+/// <param name="AvgCurrentQ">Q实际值平均值</param>
+/// <param name="MedianCurrentQ">Q实际值中位数</param>
+public record QfodCoilStatistics(
+    byte CoilIndex,
+    IReadOnlyList<int> DeltaQs,
+    IReadOnlyList<float> CurrentQs,
+    IReadOnlyList<float> CalibratedQs,
+    int MaxDeltaQ,
+    int MinDeltaQ,
+    double AvgDeltaQ,
+    int MedianDeltaQ,
+    float MaxCurrentQ,
+    float MinCurrentQ,
+    double AvgCurrentQ,
+    float MedianCurrentQ
+);
+
+/// <summary>
+/// Qfod Excel 报告
+/// </summary>
+/// <param name="PureFileName">纯手机日志文件名</param>
+/// <param name="ForeignFileName">异物日志文件名</param>
+/// <param name="PureStatisticsByCoil">纯手机按线圈分组的统计</param>
+/// <param name="Threshold">标定阈值 = (纯手机ΔQ最大值 + 异物ΔQ最小值) / 2（有符号 ΔQ）</param>
+/// <param name="ErrorMessage">错误信息</param>
+public record QfodExcelReport(
+    string PureFileName,
+    string ForeignFileName,
+    IReadOnlyDictionary<byte, QfodCoilStatistics> PureStatisticsByCoil,
+    int Threshold,
+    string? ErrorMessage
+)
+{
+    public bool IsSuccess => ErrorMessage == null;
+}

src/Gpulse.WCT.DataAnalyzer.Core/Application/Exporting/AnalyzeExcelExporter.cs

@@ -0,0 +1,363 @@
+using System.Data;
+using ClosedXML.Excel;
+using Gpulse.WCT.DataAnalyzer.Core.Application.Analysis;
+
+namespace Gpulse.WCT.DataAnalyzer.Core.Application.Exporting;
+
+/// <summary>
+/// 分析结果 Excel 导出器
+/// </summary>
+public class AnalyzeExcelExporter
+{
+    /// <summary>
+    /// 功率段列表 (与模板一致)
+    /// </summary>
+    private static readonly int[] PowerSegments = [350, 500, 750, 1000, 1250, 1500, 1750, 2000, 2250];
+
+    /// <summary>
+    /// 导出 Ploss 分析报告到 Excel
+    /// </summary>
+    /// <param name="report">Ploss 分析报告</param>
+    /// <param name="outputPath">输出文件路径</param>
+    /// <param name="cancellationToken">取消令牌</param>
+    /// <returns>输出文件路径</returns>
+    public async Task<string> ExportPlossReportAsync(
+        PlossExcelReport report,
+        string outputPath,
+        CancellationToken cancellationToken = default)
+    {
+        using var workbook = new XLWorkbook();
+        var worksheet = workbook.Worksheets.Add("Sheet1");
+
+        // 动态数据行：找出最大数据量（无数据时为0）
+        var statsValues = report.StatisticsByPowerSegment.Values.ToList();
+        int maxDataRows = statsValues.Count > 0
+            ? statsValues.Max(s => Math.Max(s.TheoreticalDeltaPs.Count, s.Vpas.Count))
+            : 0;
+
+        // 计算总行数：标题行(1) + 统计行(5) + 数据行子标题(1) + 数据行标题(1) + 数据行(maxDataRows)
+        int totalRows = 8 + maxDataRows;
+
+        // 每个功率段占两列，总共 1 + 9*2 = 19 列
+        int lastCol = 1 + PowerSegments.Length * 2;
+
+        // 行1: 功率段标题行（每个功率段合并两列，背景色加深）
+        worksheet.Cell(1, 1).Value = "功率段";
+        var headerRowRange = worksheet.Range(1, 1, 1, lastCol);
+        headerRowRange.Style.Fill.BackgroundColor = XLColor.LightGray;  // 设置背景色
+
+        for (int i = 0; i < PowerSegments.Length; i++)
+        {
+            int col = 2 + i * 2;
+            var range = worksheet.Range(1, col, 1, col + 1);
+            range.Merge();
+            range.FirstCell().Value = PowerSegments[i];
+            range.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+            range.Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+        }
+
+        // 行2-6: 统计行（每个功率段合并两列）
+        var statLabels = new[] { "理论Δp最大值", "理论Δp最小值", "理论Δp平均值", "理论Δp中位数", "标定Δp值" };
+        for (int statRow = 0; statRow < 5; statRow++)
+        {
+            int excelRow = 2 + statRow;
+            worksheet.Cell(excelRow, 1).Value = statLabels[statRow];
+
+            for (int i = 0; i < PowerSegments.Length; i++)
+            {
+                var power = PowerSegments[i];
+                int col = 2 + i * 2;
+                var range = worksheet.Range(excelRow, col, excelRow, col + 1);
+                range.Merge();
+                range.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+                range.Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+
+                if (report.StatisticsByPowerSegment.TryGetValue(power, out var stats))
+                {
+                    var value = statRow switch
+                    {
+                        0 => stats.Max,
+                        1 => stats.Min,
+                        2 => stats.Avg,
+                        3 => stats.Median,
+                        4 => stats.CalibrationValue,
+                        _ => 0
+                    };
+                    range.FirstCell().Value = value;
+                }
+            }
+        }
+
+        // 行7: 数据行子标题（理论Δp / VPA），第一列开始合并"数据行"
+        int subHeaderRow = 7;
+        int dataStartRow = 8;
+
+        if (maxDataRows > 0)
+        {
+            worksheet.Cell(subHeaderRow, 1).Value = "数据行";
+            // 从子标题行开始合并到最后一行数据
+            int mergeEndRow = dataStartRow + maxDataRows - 1;
+            if (mergeEndRow > subHeaderRow)
+            {
+                var mergeRange = worksheet.Range(subHeaderRow, 1, mergeEndRow, 1);
+                mergeRange.Merge();
+            }
+            // 第一列居中
+            worksheet.Range(subHeaderRow, 1, Math.Max(subHeaderRow, dataStartRow + maxDataRows - 1), 1).Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+            worksheet.Range(subHeaderRow, 1, Math.Max(subHeaderRow, dataStartRow + maxDataRows - 1), 1).Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+        }
+
+        for (int i = 0; i < PowerSegments.Length; i++)
+        {
+            int col = 2 + i * 2;
+            worksheet.Cell(subHeaderRow, col).Value = "理论Δp";
+            worksheet.Cell(subHeaderRow, col + 1).Value = "VPA";
+            worksheet.Cell(subHeaderRow, col).Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+            worksheet.Cell(subHeaderRow, col).Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+            worksheet.Cell(subHeaderRow, col + 1).Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+            worksheet.Cell(subHeaderRow, col + 1).Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+        }
+
+        // 填充数据行（每个功率段两列：理论Δp 和 VPA）
+        for (int row = 0; row < maxDataRows; row++)
+        {
+            int excelRow = dataStartRow + row;
+
+            for (int i = 0; i < PowerSegments.Length; i++)
+            {
+                var power = PowerSegments[i];
+                int col = 2 + i * 2;
+                if (report.StatisticsByPowerSegment.TryGetValue(power, out var stats))
+                {
+                    // 理论Δp（第一列）
+                    if (row < stats.TheoreticalDeltaPs.Count)
+                    {
+                        var cell = worksheet.Cell(excelRow, col);
+                        cell.Value = stats.TheoreticalDeltaPs[row];
+                        cell.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+                        cell.Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+                    }
+
+                    // VPA（第二列）
+                    if (row < stats.Vpas.Count)
+                    {
+                        var cell = worksheet.Cell(excelRow, col + 1);
+                        cell.Value = stats.Vpas[row];
+                        cell.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+                        cell.Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+                    }
+                }
+            }
+        }
+
+        // 设置第一列居中
+        worksheet.Range(1, 1, totalRows, 1).Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+        worksheet.Range(1, 1, totalRows, 1).Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+
+        // 添加表格边框线
+        if (totalRows > 0)
+        {
+            var tableRange = worksheet.Range(1, 1, totalRows, lastCol);
+            tableRange.Style.Border.TopBorder = XLBorderStyleValues.Thin;
+            tableRange.Style.Border.BottomBorder = XLBorderStyleValues.Thin;
+            tableRange.Style.Border.LeftBorder = XLBorderStyleValues.Thin;
+            tableRange.Style.Border.RightBorder = XLBorderStyleValues.Thin;
+        }
+
+        // 设置列宽
+        worksheet.Column(1).Width = 15;
+        for (int c = 2; c <= lastCol; c++)
+            worksheet.Column(c).Width = 10;
+
+        // 保存文件
+        EnsureParentDirectory(outputPath);
+        await Task.Run(() => workbook.SaveAs(outputPath), cancellationToken);
+
+        return outputPath;
+    }
+
+    /// <summary>
+    /// 导出 Qfod 标定报告到 Excel
+    /// </summary>
+    /// <param name="report">Qfod 标定报告</param>
+    /// <param name="outputPath">输出文件路径</param>
+    /// <param name="cancellationToken">取消令牌</param>
+    /// <returns>输出文件路径</returns>
+    public async Task<string> ExportQfodReportAsync(
+        QfodExcelReport report,
+        string outputPath,
+        CancellationToken cancellationToken = default)
+    {
+        using var workbook = new XLWorkbook();
+        var worksheet = workbook.Worksheets.Add("Sheet1");
+
+        // 动态数据行：找出最大数据量
+        int maxDataRows = 0;
+        foreach (var stats in report.PureStatisticsByCoil.Values)
+        {
+            maxDataRows = Math.Max(maxDataRows, stats.DeltaQs.Count);
+        }
+
+        // 每个线圈三列，总共 1 + 3*3 = 10 列
+        int lastCol = 10;
+
+        // 计算总行数：标题行(1) + 统计行(5) + 数据行子标题(1) + 数据行(maxDataRows)
+        int totalRows = 7 + maxDataRows;
+
+        // 行1: 线圈编号标题行（背景色加深）
+        var headerRange = worksheet.Range(1, 1, 1, lastCol);
+        headerRange.Style.Fill.BackgroundColor = XLColor.LightGray;
+
+        worksheet.Cell(1, 1).Value = "线圈编号";
+        worksheet.Range(1, 1, 1, lastCol).Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+        worksheet.Range(1, 1, 1, lastCol).Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+
+        // Q0、Q1、Q2 各合并三列
+        for (int coil = 0; coil < 3; coil++)
+        {
+            int col = 2 + coil * 3;
+            var range = worksheet.Range(1, col, 1, col + 2);
+            range.Merge();
+            range.FirstCell().Value = $"Q{coil}";
+            range.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+            range.Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+        }
+
+        // 行2-6: 统计行（每个线圈合并三列）
+        var statLabels = new[] { "Q最大值", "Q最小值", "Q平均值", "Q中位数", "标定Q值" };
+        for (int statRow = 0; statRow < 5; statRow++)
+        {
+            int excelRow = 2 + statRow;
+            worksheet.Cell(excelRow, 1).Value = statLabels[statRow];
+            worksheet.Cell(excelRow, 1).Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+            worksheet.Cell(excelRow, 1).Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+
+            for (int coil = 0; coil < 3; coil++)
+            {
+                int col = 2 + coil * 3;
+                var range = worksheet.Range(excelRow, col, excelRow, col + 2);
+                range.Merge();
+                range.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+                range.Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+
+                if (report.PureStatisticsByCoil.TryGetValue((byte)coil, out var stats))
+                {
+                    var value = statRow switch
+                    {
+                        0 => stats.MaxDeltaQ,
+                        1 => stats.MinDeltaQ,
+                        2 => stats.AvgDeltaQ,
+                        3 => stats.MedianDeltaQ,
+                        4 => report.Threshold,
+                        _ => 0
+                    };
+                    range.FirstCell().Value = value;
+                }
+            }
+        }
+
+        // 行7: 数据行子标题（ΔQ / Q实际值 / Q校准值）+ 数据行标题开始合并
+        int subHeaderRow = 7;
+        int dataStartRow = 8;
+
+        if (maxDataRows > 0)
+        {
+            worksheet.Cell(subHeaderRow, 1).Value = "数据行";
+            int mergeEndRow = dataStartRow + maxDataRows - 1;
+            if (mergeEndRow > subHeaderRow)
+            {
+                var mergeRange = worksheet.Range(subHeaderRow, 1, mergeEndRow, 1);
+                mergeRange.Merge();
+            }
+            worksheet.Range(subHeaderRow, 1, mergeEndRow, 1).Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+            worksheet.Range(subHeaderRow, 1, mergeEndRow, 1).Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+        }
+
+        // 每个线圈三列子标题
+        for (int coil = 0; coil < 3; coil++)
+        {
+            int col = 2 + coil * 3;
+            worksheet.Cell(subHeaderRow, col).Value = "ΔQ";
+            worksheet.Cell(subHeaderRow, col + 1).Value = "Q实际值";
+            worksheet.Cell(subHeaderRow, col + 2).Value = "Q校准值";
+
+            for (int c = col; c <= col + 2; c++)
+            {
+                worksheet.Cell(subHeaderRow, c).Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+                worksheet.Cell(subHeaderRow, c).Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+            }
+        }
+
+        // 填充数据行
+        for (int row = 0; row < maxDataRows; row++)
+        {
+            int excelRow = dataStartRow + row;
+
+            for (int coil = 0; coil < 3; coil++)
+            {
+                if (report.PureStatisticsByCoil.TryGetValue((byte)coil, out var stats))
+                {
+                    int col = 2 + coil * 3;
+
+                    // ΔQ
+                    if (row < stats.DeltaQs.Count)
+                    {
+                        var cell = worksheet.Cell(excelRow, col);
+                        cell.Value = stats.DeltaQs[row];
+                        cell.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+                        cell.Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+                    }
+
+                    // Q实际值
+                    if (row < stats.CurrentQs.Count)
+                    {
+                        var cell = worksheet.Cell(excelRow, col + 1);
+                        cell.Value = stats.CurrentQs[row];
+                        cell.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+                        cell.Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+                    }
+
+                    // Q校准值
+                    if (row < stats.CalibratedQs.Count)
+                    {
+                        var cell = worksheet.Cell(excelRow, col + 2);
+                        cell.Value = stats.CalibratedQs[row];
+                        cell.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+                        cell.Style.Alignment.Vertical = XLAlignmentVerticalValues.Center;
+                    }
+                }
+            }
+        }
+
+        // 添加表格边框线
+        if (totalRows > 0)
+        {
+            var tableRange = worksheet.Range(1, 1, totalRows, lastCol);
+            tableRange.Style.Border.TopBorder = XLBorderStyleValues.Thin;
+            tableRange.Style.Border.BottomBorder = XLBorderStyleValues.Thin;
+            tableRange.Style.Border.LeftBorder = XLBorderStyleValues.Thin;
+            tableRange.Style.Border.RightBorder = XLBorderStyleValues.Thin;
+        }
+
+        // 设置列宽
+        worksheet.Column(1).Width = 12;
+        for (int c = 2; c <= lastCol; c++)
+            worksheet.Column(c).Width = 10;
+
+        // 保存文件
+        EnsureParentDirectory(outputPath);
+        await Task.Run(() => workbook.SaveAs(outputPath), cancellationToken);
+
+        return outputPath;
+    }
+
+    /// <summary>
+    /// 确保 outputPath 的父目录存在（用户 --output 指向不存在目录时自动创建，避免 SaveAs 崩溃）
+    /// </summary>
+    private static void EnsureParentDirectory(string outputPath)
+    {
+        var dir = Path.GetDirectoryName(outputPath);
+        if (!string.IsNullOrEmpty(dir))
+            Directory.CreateDirectory(dir);
+    }
+}