On-load limit time automatic measuring device and method for black-start diesel generator

The invention discloses an on-load limit time automatic measuring device for a black-start diesel generator. The device comprises an oil level sensor, a processor module, a nixie tube display controlmodule and a power supply module, the device measures the oil level of an oil tank of the diesel generator through the oil level sensor, converts the oil level into an analog voltage signal and provides the analog voltage signal to the processor module, the processor module converts the voltage signal into a digital signal according to the analog AD acquisition port and further restores the digital signal into an actual oil level value, and a worker operates the diesel generator to start and carry out full load. The nixie tube display control module is operated to send a starting instruction to the intelligent processor; the processor module records the starting time and the starting oil level, when the oil level is reduced to a set limit value, measurement work is automatically stopped, the processor module recor