Patent attributes
A mobile construction device sensor unit comprises a point-to-point radio ranging system and a position determining component. The point-to-point radio ranging system is configured to couple with a mobile construction device. The position determining component is coupled with the point-to-point radio ranging system and is configured for determining a position of the sensor unit in at least two dimensions based on communications between the point-to-point radio ranging system and a plurality of tags respectively located at a plurality of knowable locations within an operating environment of the mobile construction device.