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 71f5fc9..c22b76d 100644
--- a/app/src/main/java/com/sw/platecabinet/activity/LoginByFaceActivity.kt
+++ b/app/src/main/java/com/sw/platecabinet/activity/LoginByFaceActivity.kt
@@ -94,15 +94,16 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
     override fun initialize() {
         userViewModel.activeEngine()
 
-        PlcHelper.getInstance(this).openSerialPort(object : PlcCallback<String> {
-            override fun onSuccess(result: String) {
-                ToastUtils.showToast("打开串口 → 成功: ${result}")
-            }
+        PlcHelper.getInstance(this@LoginByFaceActivity)
+            .openSerialPort(object : PlcCallback<String> {
+                override fun onSuccess(result: String) {
+                    ToastUtils.showToast("打开串口 → 成功: ${result}")
+                }
 
-            override fun onError(message: String) {
-                ToastUtils.showToast("打开串口 → 失败: $message")
-            }
-        })
+                override fun onError(message: String) {
+                    ToastUtils.showToast("打开串口 → 失败: $message")
+                }
+            })
 
         initArcViewModel()
         initArcView()
@@ -480,6 +481,8 @@ class LoginByFaceActivity : BaseActivity<ActivityLoginFaceBinding>(),
 
         recognizeViewModel.destroy()
 
+        PlcHelper.getInstance(this@LoginByFaceActivity).release()
+
         EventBus.getDefault().unregister(this)
         super.onDestroy()
     }