diff --git a/app/src/main/java/com/casic/detector/view/MainActivity.kt b/app/src/main/java/com/casic/detector/view/MainActivity.kt
index 2da8b1e..a109880 100644
--- a/app/src/main/java/com/casic/detector/view/MainActivity.kt
+++ b/app/src/main/java/com/casic/detector/view/MainActivity.kt
@@ -1779,7 +1779,7 @@
                         object : RadarScanView.OnGetNearestPointCallback {
                             override fun getNearestPoint(point: RadarScanView.DataPoint?) {
                                 if (point == null) {
-                                    binding.distanceValueView.text = "大于5500cm"
+                                    binding.distanceValueView.text = "大于550cm"
                                     binding.distancePgBar.progress = 100
                                 } else {
                                     binding.distanceValueView.text = "${point.distance * 100}cm"

diff --git a/app/src/main/java/com/casic/detector/view/MainActivity.kt b/app/src/main/java/com/casic/detector/view/MainActivity.kt
index 2da8b1e..a109880 100644
--- a/app/src/main/java/com/casic/detector/view/MainActivity.kt
+++ b/app/src/main/java/com/casic/detector/view/MainActivity.kt
@@ -1779,7 +1779,7 @@
                         object : RadarScanView.OnGetNearestPointCallback {
                             override fun getNearestPoint(point: RadarScanView.DataPoint?) {
                                 if (point == null) {
-                                    binding.distanceValueView.text = "大于5500cm"
+                                    binding.distanceValueView.text = "大于550cm"
                                     binding.distancePgBar.progress = 100
                                 } else {
                                     binding.distanceValueView.text = "${point.distance * 100}cm"
diff --git a/app/src/main/java/com/casic/detector/widgets/RadarScanView.kt b/app/src/main/java/com/casic/detector/widgets/RadarScanView.kt
index fe35d42..8b3a220 100644
--- a/app/src/main/java/com/casic/detector/widgets/RadarScanView.kt
+++ b/app/src/main/java/com/casic/detector/widgets/RadarScanView.kt
@@ -378,6 +378,7 @@
             //在最近的点外侧绘制同心圆
             targetPoint = nearestPoint.convertPointF()
         } else {
+            points?.clear()
             callback.getNearestPoint(null)
         }
         //不管有无数据点，都要刷新点位数据，不然从有数据到无数据这个过程，界面不会及时刷新