Qt slot function not receive signals (transmission data using custom type)

Custom structures

struct UT372Data
{
    UT372Model model;
    UT372RPMModel rpmModel;
    double currentValue;
    UT372TimeFormat currentTime;
    double MMAValue;
    bool isSend = false;
};

　　Add the following function before a signal connection and a groove can handle

   qRegisterMetaType <UT372Data> ( "UT372Data"); // need to add this code when the custom data type used to transmit data signals and slots

    connect(m_USBThread,&USBThread::sendData,this,&Widget::receiveUT372Data);