Double-beam virtual fence capable of identifying boundary and direction of working area

The invention discloses a double-beam virtual fence capable of identifying boundary and direction of a working area. An outdoor mobile robot is provided with a master wireless transceiving device, virtual boundary stations are arranged at the vertex of the working area, the virtual boundary station is provided with a slave wireless transceiving device, an infrared transmitter and an infrared receiver, the infrared transmitter is aligned with the infrared receiver of the right virtual boundary station, the infrared receiver is aligned with the infrared transmitter of the left virtual boundary station, a two-gear dial switch is further included and is used for setting working modes: MASTER and SLAVE; the working process comprises the following steps: 1, a first coded infrared pulse signal istransmitted by the MASTER virtual boundary station, and forwarding is performed by the right SLAVE virtual boundary station; 2, a first boundary confirmation signal is transmitted by the MASTER virtual boundary station after