Device and system for monitoring a/b value of railway contact network tension compensation device

The utility model relates to an a/b value monitoring device and an a/b value monitoring system for a railway contact network tension compensation device, and belongs to the field of railway equipmentmonitoring. The monitoring device comprises an acquisition unit, a measuring unit, a processing unit, a communication unit and a power supply unit, and the measuring unit is connected with the acquisition unit, comprises a distance measuring device and an acceleration measuring device and is used for measuring the ground clearance of a balance weight of the overhead contact system tension compensation device and the acceleration of the balance weight; the acquisition unit is connected with the processing unit and is used for acquiring measurement information of the measurement unit and sendingthe measurement information to the processing unit; the processing unit is used for calculating and analyzing measurement information of the measurement unit and generating alarm information; the communication unit is connect