diff --git a/main.py b/main.py
index 32cb50a..5bc1c16 100644
--- a/main.py
+++ b/main.py
@@ -4036,7 +4036,7 @@ class Pressure_Sensor_Placement_Request(BaseModel):
     method: str  # "sensitivity" 或 "kmeans"
     sensor_count: int
     min_diameter: int = 0
-    username: str
+    user_name: str
 
 
 @app.post("/sensorplacementscheme/create")
@@ -4058,7 +4058,7 @@ async def fastapi_pressure_sensor_placement(
                 scheme_name=item["scheme_name"],
                 sensor_number=item["sensor_count"],
                 min_diameter=item["min_diameter"],
-                username=item["username"],
+                username=item["user_name"],
             )
         elif item["method"] == "kmeans":
             pressure_sensor_placement_kmeans(
@@ -4066,7 +4066,7 @@ async def fastapi_pressure_sensor_placement(
                 scheme_name=item["scheme_name"],
                 sensor_number=item["sensor_count"],
                 min_diameter=item["min_diameter"],
-                username=item["username"],
+                username=item["user_name"],
             )
 
         return {"status": "success", "method": item["method"]}