diff --git a/DeviceConnection.cpp b/DeviceConnection.cpp
index f998f16..413a26f 100644
--- a/DeviceConnection.cpp
+++ b/DeviceConnection.cpp
@@ -761,9 +761,15 @@ QString DeviceConnection::handleCommand(const std::string_view &replyText, const
         LOG(info) << "device factory reset";
     } else if (function == "headdetectparam_getdata") {
         auto &data = reply.at("data").as_object();
-        m_infomation.helmetThreshold = data.at("hatthreshold").as_int64();
-        m_infomation.headThreshold = data.at("headthreshold").as_int64();
-        m_infomation.detectFrameSize = data.at("detectframenum").as_int64();
+        if (data.contains("hatthreshold")) {
+            m_infomation.helmetThreshold = data.at("hatthreshold").as_int64();
+        }
+        if (data.contains("headthreshold")) {
+            m_infomation.headThreshold = data.at("headthreshold").as_int64();
+        }
+        if (data.contains("detectframenum")) {
+            m_infomation.detectFrameSize = data.at("detectframenum").as_int64();
+        }
         emit detectThresholdChanged(m_infomation.helmetThreshold, m_infomation.headThreshold,
                                     m_infomation.detectFrameSize);
     } else if (function == "thresholdwithhat_setdata") {