Overheat detection with clamp health monitoring

A method of assembling a detection system in an aircraft comprising:

• arranging an optical fiber along a structure of the aircraft and affixed to the structure with clamps that are spaced apart along the structure, wherein the optical fiber includes two or more sets of fiber Bragg gratings (FBGs);
• arranging a light source to generate light with two or more wavelengths for injection into the optical fiber;
• and
• configuring processing circuitry to identify an overheat condition and monitor vibration experienced by the optical fiber based on reflected signals generated by the two or more sets of FBGs, wherein integrity of the clamps is indicated by monitoring the vibration;
• wherein the arranging the optical fiber includes each of the two or more FBGs of the optical fiber having a different grating pitch than others of the two or more FBGs and generating the reflected signals with a different reflected wavelength than the others of the two or more FBGs;
• and
• wherein the configuring the processing circuitry to identify the overheat condition and monitor the vibration includes identifying that the overheat condition and the vibration cause a shift in the reflected wavelength of the reflected signals produced by affected ones of the two or more FBGs, the shift being periodic over a predefined duration when based on the vibration and the shift being non-periodic over the predefined duration when based on the overheat condition.