Line patrol sensor and robot

The utility model discloses a line patrol sensor, and relates to the technical field of robots, and the line patrol sensor comprises a first inductor, a second inductor and a third inductor. The first inductor is arranged perpendicular to the ground, and the measured first induction data is used for determining the inner and outer side relation between the first inductor and the horizontally arranged electrified coil; the second inductor and the third inductor are parallel to the ground and are transversely and symmetrically arranged on the two sides of the first inductor, and second induction data measured by the second inductor are used for determining the distance relation between the second inductor and the electrified coil. Third induction data measured by the third inductor is used for determining the distance relation between the third inductor and the electrified coil. Therefore, the autonomous line patrol of the robot can be realized by utilizing the line patrol sensor only comprising the inductor, t