diff --git a/component/train.go b/component/train.go
index cb91b0c..22f70dc 100644
--- a/component/train.go
+++ b/component/train.go
@@ -3,6 +3,7 @@ package component
 import (
 	"fmt"
 	"joylink.club/ecs"
+	"log/slog"
 )
 
 // TrainPositionInfo 列车当前位置信息
@@ -52,7 +53,7 @@ type TrainBtm struct {
 	//天线此时是否在应答器上方
 	AboveBalise bool
 	//列车在运行方向顺序扫描到的应答器
-	ScannedBalises []*TrainBaliseTelegram
+	ScannedBalise *TrainBaliseTelegram
 	//最近经过的应答器id
 	viaBaliseId string
 }
@@ -76,11 +77,9 @@ func (t *TrainBtm) baliseMessageCounterAdd1() {
 // SetBaliseTelegramHadSentAndGet 获取未发送的应答器报文并标记已发送
 // 通过Canet发送应答器报文时调用该方法来获取要发送的报文
 func (t *TrainBtm) SetBaliseTelegramHadSentAndGet() *TrainBaliseTelegram {
-	for _, tbt := range t.ScannedBalises {
-		if !tbt.sent {
-			tbt.sent = true
-			return tbt
-		}
+	if t.ScannedBalise != nil && !t.ScannedBalise.sent {
+		t.ScannedBalise.sent = true
+		return t.ScannedBalise
 	}
 	return nil
 }
@@ -94,27 +93,13 @@ func (t *TrainBtm) Scanning(aboveBalise bool, aboveBaliseId string, telegram *Tr
 	if t.AboveBalise && t.viaBaliseId != aboveBaliseId {
 		t.viaBaliseId = aboveBaliseId
 		t.baliseCounterAdd1()
+		slog.Debug(fmt.Sprintf("列车经过应答器上方，应答器：[%s]", t.viaBaliseId))
 	}
 	//
 	if telegram == nil {
 		return
 	}
-	//过滤掉同一个应答器
-	for _, tbt := range t.ScannedBalises {
-		if tbt.BaliseId == telegram.BaliseId {
-			return
-		}
-	}
-	//一个新的应答器的报文
-	if len(t.ScannedBalises) < scannedBalisesMax {
-		t.ScannedBalises = append(t.ScannedBalises, telegram)
-	} else {
-		//move left
-		for i := 1; i < scannedBalisesMax; i++ {
-			t.ScannedBalises[i-1] = t.ScannedBalises[i]
-		}
-		t.ScannedBalises[scannedBalisesMax-1] = telegram
-	}
+	t.ScannedBalise = telegram
 	t.baliseMessageCounterAdd1()
 }
 
diff --git a/repository/repository.go b/repository/repository.go
index f758aa7..b080887 100644
--- a/repository/repository.go
+++ b/repository/repository.go
@@ -124,6 +124,15 @@ func (repo *Repository) ResponderList() []*Transponder {
 	}
 	return list
 }
+func (repo *Repository) ResponderListByLink(linkId string) []*Transponder {
+	var list []*Transponder
+	for _, model := range repo.responderMap {
+		if model.linkPosition.link.Id() == linkId {
+			list = append(list, model)
+		}
+	}
+	return list
+}
 func (repo *Repository) SlopeList() []*Slope {
 	var list []*Slope
 	for _, model := range repo.slopeMap {
diff --git a/sys/device_sys/balise_detection.go b/sys/device_sys/balise_detection.go
index 69837a4..0c698db 100644
--- a/sys/device_sys/balise_detection.go
+++ b/sys/device_sys/balise_detection.go
@@ -8,6 +8,8 @@ import (
 	"joylink.club/rtsssimulation/entity"
 	"joylink.club/rtsssimulation/repository"
 	"log/slog"
+	"sort"
+	"strings"
 )
 
 // BaliseDetectSystem 列车应答器天线探测轨旁应答器
@@ -24,13 +26,13 @@ func NewBaliseDetectSystem() *BaliseDetectSystem {
 }
 func (s *BaliseDetectSystem) Update(w ecs.World) {
 	wd := entity.GetWorldData(w)
-	balises := wd.Repo.ResponderList()
 	//所有列车
 	//列车速度80KM/H时，222mm/10ms
 	s.trainQuery.Each(w, func(entry *ecs.Entry) {
 		btm := component.TrainBtmType.Get(entry)
 		if btm.PowerAmplifierSwitch { //车载应答器天线功率放大器开启
 			tp := component.TrainPositionInfoType.Get(entry)
+			balises := wd.Repo.ResponderListByLink(tp.HeadLink)
 			detectedBalise := s.detect(wd, tp, balises)
 			//列车应答器天线扫描到应答器,获取应答器报文发送给BTM
 			tbt := s.findBaliseTelegram(wd, detectedBalise)
@@ -52,6 +54,9 @@ func (s *BaliseDetectSystem) findBaliseTelegram(wd *component.WorldData, detecte
 	baliseEntry := wd.EntityMap[detectedBalise.Id()]
 	if baliseEntry != nil {
 		baliseState := component.BaliseStateType.Get(baliseEntry)
+		//测试,设置应答器默认报文
+		baliseState.ValidTelegram = []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
+		//
 		if len(baliseState.ValidTelegram) > 0 {
 			return component.NewTrainBaliseTelegram(detectedBalise.Id(), baliseState.ValidTelegram)
 		}
@@ -63,6 +68,15 @@ func (s *BaliseDetectSystem) findBaliseTelegram(wd *component.WorldData, detecte
 }
 func (s *BaliseDetectSystem) detect(wd *component.WorldData, tp *component.TrainPositionInfo, balises []*repository.Transponder) *repository.Transponder {
 	scanRange := s.calculateScanRange(wd, tp)
+	if tp.Up {
+		sort.SliceStable(balises, func(i, j int) bool {
+			return balises[j].LinkPosition().Offset() < balises[i].LinkPosition().Offset()
+		})
+	} else {
+		sort.SliceStable(balises, func(i, j int) bool {
+			return balises[i].LinkPosition().Offset() < balises[j].LinkPosition().Offset()
+		})
+	}
 	for _, balise := range balises {
 		if scanRange.contains(balise.LinkPosition()) {
 			return balise
@@ -104,6 +118,18 @@ func (s *scanRange) format() {
 		s.startOffset, s.endOffset = s.endOffset, s.startOffset
 	}
 }
+func (s *scanRange) str() string {
+	sb := strings.Builder{}
+	sb.WriteString("LinkRange[")
+	sb.WriteString("linkId:")
+	sb.WriteString(s.linkId)
+	sb.WriteString(" start:")
+	sb.WriteString(fmt.Sprintf("%d", s.startOffset))
+	sb.WriteString(" end:")
+	sb.WriteString(fmt.Sprintf("%d", s.endOffset))
+	sb.WriteString("]")
+	return sb.String()
+}
 
 // true-应答器balisePosition在该scanRange内
 func (s *scanRange) contains(balisePosition *repository.LinkPosition) bool {