diff --git a/third_party/can_btm/balise_btm.go b/third_party/can_btm/balise_btm.go
index ed287b9..59efdf1 100644
--- a/third_party/can_btm/balise_btm.go
+++ b/third_party/can_btm/balise_btm.go
@@ -37,6 +37,9 @@ type btmCanetClient struct {
 	remoteIp string
 	//最近一次车载ATP系统查询帧序号
 	atpReqSn byte
+	//btm最近一次接收到atp查询请求的时间
+	//当BTM超过150ms即3个周期没有收到atq下发的查询帧，则清空报文缓冲区
+	atpReqTime *time.Time
 	//最近一次车载ATP系统查询帧CRC16校验结果,true-校验通过
 	atpReqCrc16Check bool
 	//btm系统时间,每次接收到ATP查询请求帧时同步一次时间
@@ -160,6 +163,7 @@ func (s *btmCanetClient) handleCanetFrames(cfs []byte) {
 
 // 处理接收的ATP查询请求帧
 func (s *btmCanetClient) dealWithAptReq(f *message.CanetFrame) {
+	now := time.Now()
 	atpReq := &message.AtpRequestFrame{}
 	if !atpReq.Decode(f) {
 		slog.Warn("CanetFrame解码成AtpRequestFrame失败", "CanetFrame", f.String())
@@ -179,6 +183,8 @@ func (s *btmCanetClient) dealWithAptReq(f *message.CanetFrame) {
 	//ATP 是否要求BTM 重发上一应答器报文
 	isResendRequest := atpReq.ResendRequest == 2 //0b10
 	s.rspToAtp(isResendRequest)
+	//记录atp查询时间
+	s.atpReqTime = &now
 }
 
 // BTM发送响应给ATP