Fluorescence lifetime type optical fiber oxygen sensor

The invention provides a fluorescence lifetime type optical fiber oxygen sensor. The fluorescence lifetime type optical fiber oxygen sensor comprises an optical system, a temperature measuring system, a signal processing system and a control system, the optical system comprises a quartz multimode optical fiber coupling structure, an optical baffle plate, a direct insertion LED and an optical fiber coupling LED; the signal processing system comprises a silicon photodiode and an analog signal processing module; the MCU control module respectively sends pulse signals to the in-line LED reference light source and the optical fiber coupling LED excitation light source through the sinusoidal modulation module, so that sine waves with the same frequency are generated; the optical system is used for collecting a direct insertion LED reference light source and an optical fiber coupling LED excitation light source and transmitting the collected light sources to the silicon photodiode; fluorescence and reference light s