Safety alarm device and method for airplane structural strength test

The invention belongs to the technical field of airplane structural strength tests, and particularly relates to a safety alarm device and method for an airplane structural strength test. The device comprises a coordinated loading control system, a PM66S chip, LED lamps and an alarm power amplifier, wherein the coordinated loading control system can output a stepping signal, an out-of-limit signal,an out-of-tolerance signal and an emergency signal; the PM66S chip is provided with four input ends, and each input end is connected with the coordinated loading control system through different optical coupling isolators; the number of the LED lamps is four, the four LED lamps are connected with one output end of the PM66S chip respectively, the four LED lamps correspond to the four input ends of the PM66S chip in a one-to-one mode, and when the different input ends of the PM66S chip are triggered, the corresponding LED lamps are turned on; and the alarm power amplifier is connected with theoutput end of the PM66S c