connect, disconnect and reconnect problem

[yakin]

You construct the first Detector in the constructor of your thread class. That means, this object is part of the main thread because your thread (doRadio) is not started yet.
Then you delete the detector from the running thread (doRadio) where the detector object belongs to the main thread. After that, you construct a new detector in the doRadio thread (So the new object belongs to the doRadio thread).
Qt distinguish between queued connection and normal connection. Queued connection will work between threads, normal won't. If you do not specify a connection type while connecting (like you did), the connection type will be auto. In this case Qt uses QueuedConnection between different threads. So far...
After the delete, you will get a QueuedConnection. This means, your thread needs to dispatch events in your run method to process the signals from the main thread. But you do not dispatch the event with an event loop. You have to call QThread::exec in doRadio::run() to use the threads event loop or you can create your own event loop, cause QThread::exec() will only return after exit() called. That would be hard to bring together with your while loop.