  The system takes the embedded system single chip as the core, and organizes
the gamma ray induction module, keying switch, radiation source braid locking
mechanism, on-site alarm equipment, NB-IoT communication module, GPS
positioning system and other related equipment to realize real-time operators
warning and remote alarming to the monitoring platform. Thus, timely management
of the fallen radiation source can be realized. What's more, position of
radiation source braid is monitored by radiation source braid locking
mechanism, gamma-ray induction module and keying switch. This idea solves the
bottleneck problem of difficulty in transmitting real-time remote monitoring
signal by NB-IoT technology. Single-chip microcontroller is innovatively
embedded around the radiation source to monitor whether the source falls off.
As a result, when part or all of the source braid are not returned to the
storage location of the flaw detector, the gamma ray induction module, keying
switch, and radiation source braid locking mechanism remind the operator of the
dangerous situation. At the same time, NB-IoT transmission system alarms
companies and regulators of safety risks. In conclusion, radiation source can
be found timely when it falls off, to avoid radiation accident. Two bottlenecks
related to installing GPS positioning system can be solved, that the GPS
positioning system is installed on the flaw detector, and the radioactive
source is still unable to be controlled, and that the GPS positioning system
requires power to transmit the signal back to the regulatory platform or to the
platform of the flaw detection enterprise. This article's ideas can solve this
problem through the advantages of NB-IoT.
