diff --git a/UIShare/GlobalVariable/DeviceHealthMonitor.cs b/UIShare/GlobalVariable/DeviceHealthMonitor.cs
new file mode 100644
index 0000000..b95d497
--- /dev/null
+++ b/UIShare/GlobalVariable/DeviceHealthMonitor.cs
@@ -0,0 +1,255 @@
+using DeviceCommand.Base;
+using Logger;
+using Model.Models;
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace UIShare.GlobalVariable
+{
+ ///
+ /// 设备健康监控器：独立于监控采样的心跳重连机制。
+ ///
+ /// 设计原则——与检测值零冲突：
+ ///
+ /// - 健康检查平时只读 （纯本地属性，零网络开销，不碰通信锁）
+ /// - 仅在 IsConnected==false 时才获取 _commLock 执行重连，与监控采样天然串行化
+ /// - ModbusTcp 的 ConnectAsync 是幂等的（已连接时直接返回），不会中断正在进行的监控
+ /// - TCP 的 ConnectAsync 会重置连接，但监控的 catch 容忍单次失败，下次 tick 自动恢复
+ ///
+ ///
+ ///
+ public class DeviceHealthMonitor : IDisposable
+ {
+ private readonly IDictionary _deviceMap;
+ private readonly SystemConfig _systemConfig;
+ private readonly string _scopeName;
+
+ /// 健康检查定时器
+ private Timer? _healthCheckTimer;
+
+ /// 每个设备的连续失败计数
+ private readonly ConcurrentDictionary _failureCounts = new();
+
+ /// 每个设备的重连尝试次数（用于计算退避阈值）
+ private readonly ConcurrentDictionary _reconnectAttempts = new();
+
+ /// 基础失败阈值（首次重连触发值）
+ private const int BaseFailureThreshold = 3;
+
+ /// 退避上限（最大阈值）
+ private const int MaxBackoffThreshold = 15;
+
+ /// 健康检查间隔（毫秒）
+ private readonly int _checkIntervalMs;
+
+ private bool _disposed;
+ private readonly object _startStopLock = new();
+
+ ///
+ /// 创建健康监控器实例。
+ ///
+ /// 当前作用域的设备字典
+ /// 当前作用域的系统配置（用于更新 DeviceInfoVM.IsConnected）
+ /// 作用域名称（日志标识）
+ /// 健康检查间隔，默认 5000ms
+ public DeviceHealthMonitor(
+ IDictionary deviceMap,
+ SystemConfig systemConfig,
+ string scopeName,
+ int checkIntervalMs = 5000)
+ {
+ _deviceMap = deviceMap;
+ _systemConfig = systemConfig;
+ _scopeName = scopeName;
+ _checkIntervalMs = checkIntervalMs;
+ }
+
+ /// 启动健康监控（幂等：多次调用只启动一次）
+ public void Start()
+ {
+ lock (_startStopLock)
+ {
+ if (_disposed || _healthCheckTimer != null) return;
+ _healthCheckTimer = new Timer(
+ OnHealthCheckTick,
+ null,
+ TimeSpan.FromSeconds(10), // 首次检查延迟 10 秒，避免启动时设备尚未连接完成
+ TimeSpan.FromMilliseconds(_checkIntervalMs));
+ LoggerHelper.Info($"[{_scopeName}] 设备健康监控已启动，检查间隔={_checkIntervalMs}ms，基础重连阈值={BaseFailureThreshold}次（指数退避上限={MaxBackoffThreshold}）");
+ }
+ }
+
+ /// 停止健康监控
+ public void Stop()
+ {
+ lock (_startStopLock)
+ {
+ _healthCheckTimer?.Change(Timeout.Infinite, Timeout.Infinite);
+ _healthCheckTimer?.Dispose();
+ _healthCheckTimer = null;
+ _failureCounts.Clear();
+ _reconnectAttempts.Clear();
+ }
+ }
+
+ ///
+ /// 健康检查核心逻辑：遍历设备，检查连接状态，失败计数超阈值则重连。
+ /// TCP 设备额外进行主动探活（*IDN?），以检测死连接（对端崩溃但 TCP 未收到 FIN）。
+ ///
+ private async void OnHealthCheckTick(object? state)
+ {
+ if (_disposed || _deviceMap.Count == 0) return;
+
+ // 快照避免枚举期间字典被修改
+ var snapshot = _deviceMap.ToArray();
+
+ foreach (var kvp in snapshot)
+ {
+ if (_disposed) return;
+
+ string deviceName = kvp.Key;
+ var device = kvp.Value;
+
+ try
+ {
+ bool alive = device.IsConnected;
+
+ // TCP 设备主动探活：IsConnected 只反映上次操作状态，无法检测死连接
+ if (alive && device is Tcp tcpDevice)
+ {
+ alive = await ProbeTcpDeviceAsync(tcpDevice);
+ }
+
+ if (alive)
+ {
+ // 连接正常：清零失败计数与退避
+ _failureCounts.TryRemove(deviceName, out _);
+ _reconnectAttempts.TryRemove(deviceName, out _);
+ continue;
+ }
+
+ // 连接断开：累加失败计数
+ int failures = _failureCounts.AddOrUpdate(deviceName, 1, (_, count) => count + 1);
+
+ // 计算当前退避阈值：基础值 + 重连尝试次数 × 2，上限为 MaxBackoffThreshold
+ int attempts = _reconnectAttempts.GetOrAdd(deviceName, 0);
+ int currentThreshold = Math.Min(BaseFailureThreshold + attempts * 2, MaxBackoffThreshold);
+
+ if (failures < currentThreshold)
+ {
+ LoggerHelper.Warn(
+ $"[{_scopeName}] 设备 [{deviceName}] 连接断开，等待重连中 ({failures}/{currentThreshold})");
+ continue;
+ }
+
+ // 达到阈值：执行重连
+ await ReconnectDeviceAsync(deviceName, device);
+ }
+ catch (Exception ex)
+ {
+ LoggerHelper.Error($"[{_scopeName}] 设备 [{deviceName}] 健康检查异常：{ex.Message}");
+ }
+ }
+ }
+
+ ///
+ /// 对 TCP 设备执行轻量级主动探活（SCPI *IDN?），2 秒超时。
+ /// 通过 WriteReadAsync 内部获取 _commLock，与监控采样天然串行化。
+ ///
+ /// true: 探活成功（连接确实存活）; false: 探活失败（死连接）
+ private async Task ProbeTcpDeviceAsync(Tcp tcpDevice)
+ {
+ try
+ {
+ using var probeCts = new CancellationTokenSource(TimeSpan.FromSeconds(2));
+ string resp = await tcpDevice.WriteReadAsync("*IDN?\n", "\n", probeCts.Token);
+ return !string.IsNullOrWhiteSpace(resp);
+ }
+ catch
+ {
+ return false;
+ }
+ }
+
+ ///
+ /// 重连单个设备。
+ ///
+ /// 冲突避免机制：ConnectAsync 内部获取设备的 _commLock，
+ /// 如果此时监控采样正在通信，重连会等待锁释放后再执行，
+ /// 保证同一时刻只有一个操作在使用通信链路。
+ ///
+ ///
+ private async Task ReconnectDeviceAsync(string deviceName, IBaseInterface device)
+ {
+ try
+ {
+ int attempts = _reconnectAttempts.AddOrUpdate(deviceName, 1, (_, c) => c + 1);
+ int nextThreshold = Math.Min(BaseFailureThreshold + attempts * 2, MaxBackoffThreshold);
+ LoggerHelper.Info($"[{_scopeName}] 设备 [{deviceName}] 连续失败触发重连（第 {attempts} 次重连，下次阈值={nextThreshold}）...");
+
+ using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(10));
+ bool ok = await device.ConnectAsync(cts.Token);
+
+ // 同步更新 DeviceInfoVM 的 UI 状态
+ UpdateDeviceInfoState(deviceName, ok);
+
+ if (ok)
+ {
+ _failureCounts.TryRemove(deviceName, out _);
+ _reconnectAttempts.TryRemove(deviceName, out _);
+ LoggerHelper.Info($"[{_scopeName}] 设备 [{deviceName}] 重连成功");
+ }
+ else
+ {
+ LoggerHelper.Warn($"[{_scopeName}] 设备 [{deviceName}] 重连失败，将在下次检查时重试");
+ }
+ }
+ catch (OperationCanceledException)
+ {
+ UpdateDeviceInfoState(deviceName, false);
+ LoggerHelper.Warn($"[{_scopeName}] 设备 [{deviceName}] 重连超时（10s），将在下次检查时重试");
+ }
+ catch (Exception ex)
+ {
+ UpdateDeviceInfoState(deviceName, false);
+ LoggerHelper.Error($"[{_scopeName}] 设备 [{deviceName}] 重连异常：{ex.Message}");
+ }
+ }
+
+ ///
+ /// 通过 UI 线程更新 SystemConfig.DeviceList 中对应设备的 IsConnected 状态（驱动 UI 刷新）。
+ /// Timer 回调运行在线程池线程上，必须切回 UI 线程才能触发 PropertyChanged。
+ ///
+ private void UpdateDeviceInfoState(string deviceName, bool isConnected)
+ {
+ var info = _systemConfig?.DeviceList?
+ .FirstOrDefault(d => d != null &&
+ string.Equals(d.DeviceName, deviceName, StringComparison.OrdinalIgnoreCase));
+ if (info == null) return;
+
+ var dispatcher = Application.Current?.Dispatcher;
+ if (dispatcher == null || dispatcher.CheckAccess())
+ {
+ // 已在 UI 线程（或无 Dispatcher），直接赋值
+ info.IsConnected = isConnected;
+ }
+ else
+ {
+ // 切回 UI 线程赋值，避免跨线程 PropertyChanged 异常
+ dispatcher.BeginInvoke(() => info.IsConnected = isConnected);
+ }
+ }
+
+ public void Dispose()
+ {
+ if (_disposed) return;
+ _disposed = true;
+ Stop();
+ }
+ }
+}
diff --git a/UIShare/GlobalVariable/DeviceManager.cs b/UIShare/GlobalVariable/DeviceManager.cs
index ee4eb56..59fcb21 100644
--- a/UIShare/GlobalVariable/DeviceManager.cs
+++ b/UIShare/GlobalVariable/DeviceManager.cs
@@ -28,6 +28,9 @@ namespace UIShare.GlobalVariable
private readonly string _scopeName;
private readonly IEventAggregator _eventAggregator;
+ /// 设备健康监控器：独立心跳检测 + 自动重连，与监控采样互不冲突
+ private DeviceHealthMonitor? _healthMonitor;
+
/// 按 DeviceName 索引的设备字典，便于业务层按名取实例。
public IDictionary DeviceMap { get; private set; }
= new Dictionary(StringComparer.OrdinalIgnoreCase);
@@ -252,6 +255,9 @@ namespace UIShare.GlobalVariable
}
await Task.WhenAll(tasks);
+
+ // 所有设备连接完成后，启动健康监控（心跳重连）
+ StartHealthMonitor();
}
@@ -320,6 +326,7 @@ namespace UIShare.GlobalVariable
///
public async Task CloseAllDevicesAsync()
{
+ StopHealthMonitor();
List tasks = new List();
lock (_lockObj)
@@ -617,8 +624,25 @@ namespace UIShare.GlobalVariable
return Activator.CreateInstance(type, cfg) as IBaseInterface;
}
+ /// 启动设备健康监控（心跳检测 + 自动重连）
+ private void StartHealthMonitor()
+ {
+ StopHealthMonitor();
+ _healthMonitor = new DeviceHealthMonitor(DeviceMap, _systemConfig, _scopeName);
+ _healthMonitor.Start();
+ }
+
+ /// 停止设备健康监控
+ private void StopHealthMonitor()
+ {
+ _healthMonitor?.Stop();
+ _healthMonitor?.Dispose();
+ _healthMonitor = null;
+ }
+
public void Dispose()
{
+ StopHealthMonitor();
if (string.IsNullOrEmpty(_scopeName)) return;
// 遍历当前作用域用到的所有指纹，逐一移除本作用域的引用