diff --git a/app/src/main/java/com/sw/platecabinet/activity/LoginByFaceActivity.kt b/app/src/main/java/com/sw/platecabinet/activity/LoginByFaceActivity.kt
index 1946dbe..fb2bbd7 100644
--- a/app/src/main/java/com/sw/platecabinet/activity/LoginByFaceActivity.kt
+++ b/app/src/main/java/com/sw/platecabinet/activity/LoginByFaceActivity.kt
@@ -54,7 +54,6 @@ import com.sw.platecabinet.utils.BitmapSaver
 import com.sw.platecabinet.utils.CountDownUtil
 import com.sw.platecabinet.utils.Debouncer
 import com.sw.platecabinet.utils.LogFileUtil
-import com.sw.platecabinet.utils.PlateUtils
 import com.sw.platecabinet.utils.RegisterCallbackHandler
 import com.sw.platecabinet.utils.SoundPoolUtil
 import com.sw.platecabinet.utils.mego.PlcCallback
@@ -295,7 +294,7 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
         }
 
         recognizeViewModel.recognizeUserId.observe(this) { result: CompareResult? ->
-            loadLogInfo("collectFace,recognizeUserId observe userId = ${result?.faceEntity?.userName}")
+            loadLogInfo("collectFace,recognizeUserId observe userId=${result?.faceEntity?.userName},similar=${result?.similar},userType=${result?.faceEntity?.userType}")
             loadFaceRecognizeResult3(result)
         }
 
@@ -319,7 +318,7 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
      */
     private val faceSuccessThreshold by lazy { ConfigUtil.getRecognizeThreshold(this) }
 
-    private val openPlateDebouncer = Debouncer(5000)
+    private val openPlateDebouncer = Debouncer(3000)
     private val isCollecting = AtomicBoolean(false)
 
     private fun loadFaceRecognizeResult3(result: CompareResult?) {
@@ -371,7 +370,7 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
         currentUserId = userId
 
         // 防抖，防止重复开闸
-        openPlateDebouncer.debounce {
+        openPlateDebouncer.debounce("openPlateDebouncer") {
             openPlate(userId)
         }
     }
@@ -400,6 +399,8 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
             text = "新用户采集"
         }
         binding.ivCollectPhoto.gone()
+        openPlateDebouncer.reset()
+        plateEnable = true
         resumeCamera()
     }
 
@@ -409,46 +410,47 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
      * 打开餐盘柜：先获取 PLC 状态，有盘则出盘，无盘则播放提示音
      */
     private fun openPlate(userId: String?) {
+        loadLogInfo("collectFace,openPlate: userId=$userId,plateEnable=$plateEnable")
         if (plateEnable.not()) return
-        loadLogInfo("collectFace,openPlate: userId=$userId")
-        showWaitingDialog("检测餐盘中，请稍候……")
+//        showWaitingDialog("检测餐盘中，请稍候……")
         PlcHelper.getInstance(this).getStatus(object : PlcCallback<PlcStatus> {
-            override fun onSuccess(result: PlcStatus) {
-                hideWaitingDialog()
-                if (result.isEmptyPlate) {
-                    // 无餐盘，播放提示音并返回首页
-                    loadLogInfo("collectFace,openPlate: 暂无餐盘，isEmptyPlate=true，isCollectFace=$isCollectFace")
+                override fun onSuccess(result: PlcStatus) {
+                    hideWaitingDialog()
+                    if (result.isEmptyPlate) {
+                        // 无餐盘，播放提示音并返回首页
+                        loadLogInfo("collectFace,openPlate: 暂无餐盘，isEmptyPlate=true，isCollectFace=$isCollectFace")
+                        SoundPoolUtil.getInstance().play(NO_PLATE_REMIND, 0)
+                        goInitActivity()
+                        return
+                    }
+                    // 有餐盘，播放识别成功音效并调用出盘
+                    loadLogInfo("collectFace,openPlate: 检测到餐盘，开始出盘")
+                    SoundPoolUtil.getInstance().play(RECOGNIZE_SUCCESS, 0)
+                    plateEnable = false
+                    recognizeCountDownUtil.cancelCountDown()
+                    PlcHelper.getInstance(this@LoginByFaceActivity)
+                        .outPlate(object : PlcCallback<String> {
+                            override fun onSuccess(result: String) {
+                                loadLogInfo("collectFace,openPlate: 出盘成功，result=$result")
+                                goInitActivity()
+                            }
+
+                            override fun onError(message: String) {
+                                ToastUtils.showToast("出盘失败，message=$message")
+                                loadLogInfo("collectFace,openPlate: 出盘失败，message=$message")
+                                goInitActivity()
+                            }
+                        })
+                }
+
+                override fun onError(message: String) {
+                    hideWaitingDialog()
+                    // 状态获取失败，保底播放无盘提示
+                    loadLogInfo("collectFace,openPlate: 获取PLC状态失败，message=$message")
                     SoundPoolUtil.getInstance().play(NO_PLATE_REMIND, 0)
                     goInitActivity()
-                    return
                 }
-                // 有餐盘，播放识别成功音效并调用出盘
-                loadLogInfo("collectFace,openPlate: 检测到餐盘，开始出盘")
-                SoundPoolUtil.getInstance().play(RECOGNIZE_SUCCESS, 0)
-                plateEnable = false
-                recognizeCountDownUtil.cancelCountDown()
-                PlcHelper.getInstance(this@LoginByFaceActivity)
-                    .outPlate(object : PlcCallback<String> {
-                        override fun onSuccess(result: String) {
-                            loadLogInfo("collectFace,openPlate: 出盘成功，result=$result")
-                            goInitActivity()
-                        }
-
-                        override fun onError(message: String) {
-                            loadLogInfo("collectFace,openPlate: 出盘失败，message=$message")
-                            goInitActivity()
-                        }
-                    })
-            }
-
-            override fun onError(message: String) {
-                hideWaitingDialog()
-                // 状态获取失败，保底播放无盘提示
-                loadLogInfo("collectFace,openPlate: 获取PLC状态失败，message=$message")
-                SoundPoolUtil.getInstance().play(NO_PLATE_REMIND, 0)
-                goInitActivity()
-            }
-        })
+            })
     }
 
     private val openDebouncer by lazy { Debouncer(5000) }
@@ -598,9 +600,10 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
                     binding.btnCollect.tag = ""
                     binding.tvSimilarValue.text = ""
                     retryFailCount = 0
-
+                    // 人脸离开时，发送空帧清除 ViewModel 内部识别缓存，防止再次进入时使用旧数据
+                    recognizeViewModel.onPreviewFrame(emptyFrame, true)
                     if (binding.llCollectButton.isVisible) {
-                        leftDebouncer.debounce { leftCountDown() }
+                        leftDebouncer.debounce("leftDebouncer") { leftCountDown() }
                     }
                 }
                 recognizeViewModel.clearLeftFace(facePreviewInfoList)
@@ -724,13 +727,13 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
 //    private var tempUserId: String = ""
     override fun onResume() {
         super.onResume()
+        plateEnable = true
         try {
             if (isFirstOpen) {
                 isFirstOpen = false
                 goInitActivity()
                 return
             }
-
             lifecycleScope.launch {
                 try {
                     val faceDao = FaceDatabase.getInstance(this@LoginByFaceActivity).faceDao()
@@ -764,6 +767,7 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
         plateEnable = true
         collectCount = 0
 //        tempUserId = "${System.currentTimeMillis()}"
+        openPlateDebouncer.reset()
         resumeCamera()
         registerHandler = RegisterCallbackHandler()
 
@@ -852,7 +856,7 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
             ToastUtils.showToast("获取人脸照片失败")
             return
         }
-        uploadFaceDebouncer.debounce {
+        uploadFaceDebouncer.debounce("uploadFaceDebouncer") {
             addUserFace(faceData, imageFile)
         }
     }
diff --git a/app/src/main/java/com/sw/platecabinet/utils/LogFileUtil.java b/app/src/main/java/com/sw/platecabinet/utils/LogFileUtil.java
index 9493c6d..1288775 100644
--- a/app/src/main/java/com/sw/platecabinet/utils/LogFileUtil.java
+++ b/app/src/main/java/com/sw/platecabinet/utils/LogFileUtil.java
@@ -19,10 +19,15 @@ import java.io.StringReader;
 import java.text.DecimalFormat;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 
 public class LogFileUtil {
     private static boolean isSaveLog = true;
-    public static final String FILE_STR_PATH = App.getContext().getExternalCacheDir().getAbsolutePath();
+    // 使用内部存储，不会被系统缓存清理策略影响
+    public static final String FILE_STR_PATH = new File(App.getContext().getFilesDir(), "logs").getAbsolutePath();
+    // 单线程执行器，保证日志串行写入，避免多线程并发竞争
+    private static final ExecutorService LOG_EXECUTOR = Executors.newSingleThreadExecutor();
 
     public static final int SIZETYPE_B = 1;//获取文件大小单位为B的double值
     public static final int SIZETYPE_KB = 2;//获取文件大小单位为KB的double值
@@ -610,24 +615,20 @@ public class LogFileUtil {
         if (!isSaveLog) {
             return;
         }
-        new Thread() {
-            @Override
-            public void run() {
-                super.run();
-                StringBuilder sb = new StringBuilder();
-                for (String log : logs) {
-                    sb.append("===")
-                            .append((AppUtil.formatDateGetCurrentTime()))
-                            .append("===")
-                            .append("\n")
-                            .append(log)
-                            .append("\n");
-                }
-                String fileName = "log" + AppUtil.formatDateGetDay(System.currentTimeMillis()) + ".txt";
-                LogFileUtil.saveStrFile(sb.toString(), fileName, FILE_STR_PATH, true);
-
+        // 提交到单线程队列，串行执行，避免并发写入竞争
+        LOG_EXECUTOR.execute(() -> {
+            StringBuilder sb = new StringBuilder();
+            for (String log : logs) {
+                sb.append("===")
+                        .append((AppUtil.formatDateGetCurrentTime()))
+                        .append("===")
+                        .append("\n")
+                        .append(log)
+                        .append("\n");
             }
-        }.start();
+            String fileName = "log" + AppUtil.formatDateGetDay(System.currentTimeMillis()) + ".txt";
+            LogFileUtil.saveStrFile(sb.toString(), fileName, FILE_STR_PATH, true);
+        });
     }
 
     private static final String[][] MIME_MapTable = {