In this paper

a kind of all-fiber and miniaturized vibration sensor with temperature self-suppression function is proposed so to achieve the precise capture of vibration signals in electrical equipment. By fabricating a micro-cantilever on polarization-maintaining fiber

the external vibrations are converted into phase changes between two orthogonal polarization states

enabling the measurement of external vibration signals. For effectively suppressing the interference of environmental temperature to the fiber sensor

a polarization - reciprocal optical path structure is formed in the sensor so to effectively eliminate the phase errors due to temperature-induced birefringence. The test results show that the proposed sensor exhibits a flat response bandwidth within the range of 100 Hz to 6 kHz

with a vibration measurement sensitivity of 87.76 mV/(m·s

2

) and remarkable stability across a temperature span from 25 ℃ to 60 ℃. In order to verify the monitoring effectiveness of the sensor to the vibration of electrical equipment

the vibration shock detection test of the casing of equipmen

t during arcing process in transformer oil is performed in the laboratory. The test result shows that the sensor successfully captures the vibration waveform of the casing during the arcing process

with the vibration duration of the arcing process lasting approximately 20 ms. The vibration dominant frequency is 800 Hz and the maximum amplitude is up to 4.2 m/s

2

.