diff --git a/Service/AlarmService.cs b/Service/AlarmService.cs
index 8c33eb6..622a453 100644
--- a/Service/AlarmService.cs
+++ b/Service/AlarmService.cs
@@ -49,7 +49,8 @@ namespace LY.App.Service
             var entity = input.data.Adapt<List<Alarm>>();
             if (entity.Any())
             {
-                var O4entity = entity.Where(s => s.device_type == "O4" || s.serial_number == "O4"||s.device_type== "UAV");
+                // 排除掉不这几个类型的设备
+                var O4entity = entity.Where(s => s.device_type == "O4" || s.serial_number == "O4" || s.device_type == "UAV" || !string.IsNullOrEmpty(s.device_type));
                 entity = entity.Where(s => checkDistance(s.drone_lat, s.drone_lon, deviceinfo.Lat, deviceinfo.Lon) == true).ToList();
                 if (O4entity.Any())
                 {