Function detection device suitable for gas station online monitoring terminal equipment

The utility model discloses a function detection device suitable for gas station on-line monitoring terminal equipment, and solves the problem that in the prior art, when an oil gas collection controller and an oil gas recovery control console are detected, the oil gas collection controller and the oil gas recovery control console cannot be detected through an integrated detection device capable of simulating and generating a specific detection signal. The detection efficiency is low and the maintenance cost of a plurality of detection devices is high due to the facts that an oiling machine needs to be actually connected and a plurality of sensors are used for building a simulation field environment. The pulse signal output module, the pulse signal input module, the 485 communication interface module and the switching value signal input and output detection module are respectively in communication connection with corresponding I/O ports of the MCU module, and the 4-20mA current signal generation module is fur