Automatic driving vehicle accident autonomous detection method and device

The invention relates to an automatic driving vehicle accident autonomous detection method and device, and belongs to the field of automatic driving vehicle detection. The method comprises the following steps: 1) collecting test characteristic quantity, wherein the characteristic quantity is the total energy of a motion quantity signal in the frequency domain; 2) acquiring a motion quantity signal of the vehicle in real time, in a preset time window, calculating a characteristic quantity, and recording the characteristic quantity as a real-time characteristic quantity; 3) comparing the real-time characteristic quantity with the test characteristic quantity, and if the difference between the real-time characteristic quantity and the test characteristic quantity exceeds a threshold value, judging that the vehicle has an accident, wherein the comparison mode is that if the vehicle is braked and does not run on a specific road section, the real-time characteristic quantity is compared with C, and if the vehicle i