Anti-interference boundary line signal detection method for automatic walking equipment

The invention discloses an anti-interference boundary line signal detection method for automatic walking equipment. According to the invention, the received signal is converted to a frequency domain through FFT, a first part of interference signal is eliminated, and then the signal is reduced through IFFT, so that the interference part in the signal is further reduced; the restored signal is further detected, if the received signal is a target boundary line signal, whether the received signal is in an initial state is further judged according to the state of the received signal, and therefore a new boundary line signal amplitude is collected to serve as a reference value; when N times of signal amplitudes are continuously collected in the initialization state, entering an operation state; and furthermore, according to whether the difference between the signal amplitude and the reference value is within the condition range, the reliability of the signal is judged, so that the accuracy of boundary line signal d