diff --git a/protos/stationLayoutGraphics.proto b/protos/stationLayoutGraphics.proto
index 1d10ac3..711f8a2 100644
--- a/protos/stationLayoutGraphics.proto
+++ b/protos/stationLayoutGraphics.proto
@@ -137,6 +137,10 @@ message TrainWindow {
 }
 
 message AxleCounting {
+  enum TypeDetectionPoint {
+  AxleCounting = 0;
+  SectionBoundary=1;
+}
   CommonInfo common = 1;
   string code = 2;                     // 名称
   KilometerSystem kilometerSystem = 3; //公里标
@@ -144,6 +148,7 @@ message AxleCounting {
       4; // 计轴关联的非岔区物理区段和道岔，设备id和端口
   int32 index = 5; //计轴的索引编号
   bool invent = 6; //是否虚拟计轴--一般是最末端
+  TypeDetectionPoint type = 7; //检测点的类型：计轴、区段边界
 }
 
 // message Train {