diff --git a/src/barrier/generic_barrier.cpp b/src/barrier/generic_barrier.cpp
index 0b2954e..48617f2 100644
--- a/src/barrier/generic_barrier.cpp
+++ b/src/barrier/generic_barrier.cpp
@@ -18,7 +18,7 @@ namespace zsy
     GenericBarrier::GenericBarrier(const BarrierProperties &config)
         : config(config)
     {
-        Application::eventManager->subscribe(config.sn + "/open", [this](const EventManager::Event&)
+        Application::eventManager->subscribe(config.sn + "/open", [this](const EventManager::Event &)
         {
             this->open();
         });
@@ -48,6 +48,8 @@ namespace zsy
 
             Application::httpSvr->postEndpoint("/plateRecognize", [](const httplib::Request &req, httplib::Response &res)
             {
+                static std::unordered_map<std::string, long long> cache;
+                static std::mutex cacheMutex;
                 try
                 {
                     auto body = req.body;
@@ -75,6 +77,26 @@ namespace zsy
                         res.set_content(R"({})", "application/json");
                         return;
                     }
+                    auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
+                    auto key = serialno + license;
+                    long long time = ms + 60000 * 5;
+                    {
+                        std::lock_guard<std::mutex> lock(cacheMutex);
+                        std::erase_if(cache, [time](const auto &pair)
+                        {
+                            return pair.second >= time;
+                        });
+                        if (cache.contains(key))
+                        {
+                            if (cache[key] < time)
+                            {
+                                res.set_content(R"({})", "application/json");
+                                LOGGER_INFO("重复的车牌识别结果：{}  {}", serialno, license);
+                                return;
+                            }
+                        }
+                        cache[key] = ms;
+                    }
 
                     Application::threadPool->submit([imageFile,license, barrier = Application::deviceHolder->getBarrier(serialno)]
                     {