Smartphone calibration of a grade control system for a work machine

A mobile device comprising:

• a processor;
• a display coupled to the processor and configured to provide a display output;
• a wireless communication transceiver coupled to the processor and configured to wirelessly communicate with a grade control system;
• a slope/tilt sensor operably coupled to the processor and configured to detect slope/tilt of the mobile device relative to gravity;
• memory coupled to the processor and storing instructions that, when executed by the processor, provide a grade calibration application;
• the grade calibration application being configured to:
• receive user input confirming placement of the mobile device on a first defined calibration location;
• in response to receiving user input confirming placement on the first defined calibration location, detect slope of the first defined calibration location using the slope/tilt sensor;
• receive user input confirming placement of the mobile device on a second defined calibration location;
• in response to receiving user input confirming placement on the second defined calibration location, detect slope of the second defined calibration location using the slope/tilt sensor;
• and
• automatically communicate the first and second detected slope to the grade control system using the wireless communication transceiver.

A work machine comprising:

• a work blade configured to engage a ground surface, the work blade having a controllable slope;
• a grade control system having an inertial measurement unit, the grade control system being operably coupled to the work blade to control the controllable slope of the work blade;
• and
• a wireless communication module configured to receive slope detection information relative to a plurality of defined calibration locations on the work blade and to calibrate the inertial measurement unit based on the received slope detection information.