The GIL/GIS expansion joint status online monitoring system mainly consists of IoT network shutdown and status monitoring sensors. The sensors are transmitted to the IoT network shutdown through wireless LORA or wired RS485, and the IoT network shutdown is transmitted to the management platform through the internal LAN of the power company. The operation and maintenance personnel may view the real-time operating status of the expansion joint on the intranet.

The shutdown of the Internet of Things network adopts the Linux operating system, which has the advantages of high energy efficiency, low cost, low power consumption, strong data computing and control capabilities, etc; The motherboard interface is rich and has strong scalability. It supports IEC61850, 104 protocol, standard MODBUS protocol for communication protocols, and can also quickly and conveniently respond to users' customized private protocol needs.

The displacement monitoring sensor of the expansion joint adopts a low-power design, supports battery or DC power supply, and is transmitted to the Internet of Things network for shutdown through wireless LORA or wired RS485. The sensor has high linear accuracy, smooth micro linear characteristics, and micrometer level repeatability accuracy. It adopts advanced resistance material processing technology, multi contact precious metal brushes, special sliding brush support and resistance substrate material selection, and a sturdy shell to enhance the durability of the product. The structure is compact and beautiful, and the service life can reach billions of reciprocating movements. It is easy to install and disassemble.