Open circuit type combustible gas detector based on optical fiber transmission and detection method thereof

The invention relates to an open circuit type combustible gas detector based on optical fiber transmission and a detection method thereof, belonging to the technical field of fire detection. The detector comprises a light source transmission component, an optical detection component, an optical fiber transmission component and a detection terminal; wherein the optical fiber interface of the light source transmission component is connected with one end of the first optical fiber interface of the optical fiber transmission component, the other end of the optical fiber interface of the optical detection component is connected with one end of the second optical fiber interface of the optical fiber transmission component, one end of the first optical fiber interface of the optical fiber transmission component is connected with the output end of the third focusing lens of the detection terminal, and the other end of the second optical fiber interface of the optical fiber transmission component is connected with the input end of the third focusing lens of the detection terminal. The optical detection component is arranged on the site of the protected area without any electrical connection or light source transmission, and the detection terminal is arranged in the equipment room or control room with a good natural environment and a good electromagnetic environment, thereby protecting the device against such adverse environmental impacts as high temperature, high humidity, high electromagnetic interference and the like, and making the device safer, more stable and more sensitive.