diff --git a/protos/device_state.proto b/protos/device_state.proto
index 0869f97..1a06259 100644
--- a/protos/device_state.proto
+++ b/protos/device_state.proto
@@ -339,7 +339,7 @@ message TrainMapState{
 	float acceleration = 36;
 	// 半实物信息
 	// 生命信号	每个周期+1
-	int32 lifeSignal = 37;
+	int32 vobcLifeSignal = 37;
 	// TC1激活状态	1=激活
 	bool tc1Active = 38;
 	// TC2激活状态	1=激活