Temperature monitoring and alarming method and system for fiber grating sensor

The invention provides a temperature monitoring alarm method and system for a fiber grating sensor, and relates to the technical field of intelligent temperature monitoring, and the method comprises the steps: obtaining a contact structure which comprises an upper contact and a lower contact; a first fiber grating sensor is used for temperature collection and outputting an upper contact temperature monitoring signal, and a second sensor is used for temperature collection and outputting a lower contact temperature monitoring signal; an upper contact temperature value and a lower contact temperature value are output through a temperature demodulation module; and inputting the upper contact temperature value and the lower contact temperature value into a contact form-alarm matching module for temperature matching, and if the matching degree meets a preset matching degree, obtaining a disconnection signal. According to the invention, the technical problem that the accuracy of temperature monitoring alarm is low b