diff --git a/protos/stationLayoutGraphics.proto b/protos/stationLayoutGraphics.proto
index f7e9086..6fce03d 100644
--- a/protos/stationLayoutGraphics.proto
+++ b/protos/stationLayoutGraphics.proto
@@ -126,7 +126,7 @@ message StationLine {
 message TrainWindow {
   CommonInfo common = 1;
   string code = 2;
-  string sectionId = 3;
+  repeated string refDeviceId = 3; //关联的逻辑区段的id或由道岔区段生成所关联的道岔id
 }
 
 message AxleCounting {