diff --git a/src/main/java/com/ruoyi/device/service/impl/TuohengBufferDeviceImpl.java b/src/main/java/com/ruoyi/device/service/impl/TuohengBufferDeviceImpl.java
index 755e80f..dc87882 100644
--- a/src/main/java/com/ruoyi/device/service/impl/TuohengBufferDeviceImpl.java
+++ b/src/main/java/com/ruoyi/device/service/impl/TuohengBufferDeviceImpl.java
@@ -206,21 +206,30 @@ public class TuohengBufferDeviceImpl implements IBufferDeviceService {
             TelemetryMap telemetry = thingsBoardDomain.getPredefinedTuohengDeviceTelemetry(iotDeviceId);
             log.info("拓恒设备遥测数据: {}", telemetry);
 
-            // 设置在线状态
-            Boolean isActive = attributes.get(TuohengDeviceAttributes.ACTIVE).orElse(false);
-            log.info("设备在线状态 ACTIVE: {}", isActive);
-            if (isActive) {
-                telemetry.get(TuohengDeviceTelemetry.STATUS).ifPresent(statusValue -> {
+            // 设置在线状态 - 基于心跳时间戳判断
+            telemetry.get(TuohengDeviceTelemetry.STATUS).ifPresentOrElse(statusValue -> {
+                long lastHeartbeatTime = statusValue.getTimestamp();
+                long currentTime = System.currentTimeMillis();
+                long timeDiff = currentTime - lastHeartbeatTime;
+
+                log.info("STATUS 心跳时间戳: {}, 当前时间: {}, 时间差: {}ms ({}秒)",
+                        lastHeartbeatTime, currentTime, timeDiff, timeDiff / 1000);
+
+                // 5分钟 = 300000 毫秒
+                if (timeDiff > 300000) {
+                    dto.setDockStatus("OFFLINE");
+                    log.info("心跳超时(>5分钟)，设置机场状态为 OFFLINE");
+                } else {
                     String status = statusValue.getValue();
                     log.info("STATUS 遥测值: {}", status);
                     String dockStatus = "online".equals(status) ? "IDLE" : "OFFLINE";
                     dto.setDockStatus(dockStatus);
-                    log.info("设置机场状态: {}", dockStatus);
-                });
-            } else {
+                    log.info("心跳正常，设置机场状态: {}", dockStatus);
+                }
+            }, () -> {
                 dto.setDockStatus("OFFLINE");
-                log.info("设备离线，设置机场状态为 OFFLINE");
-            }
+                log.info("没有心跳数据，设置机场状态为 OFFLINE");
+            });
 
             // 设置舱内温度和湿度
             log.info("---------- 解析舱内环境数据 ----------");