Automatic walking equipment and boundary distance detection method, device and system

The invention relates to automatic walking equipment and a boundary distance detection method, device and system. The boundary of the working area of the automatic walking equipment is defined by theboundary line. The boundary line produces an electromagnetic field under the condition of applying of the boundary signal. The automatic walking equipment comprises a first detection module which induces the change of the electromagnetic field so as to generate a first detection signal; and a processing module which is configured to acquiring the first extremum and the second extremum of the firstdetection signal within the period and judging the distance between the automatic walking equipment and the boundary according to the relationship between the first extremum and the second extremum.The first detection signal is generated by inducing the change of the electromagnetic field, and the distance between the automatic walking equipment and the boundary is judged according to the relationship between the first ex