Rotary laser level with automated level calibration

1. A method of operating a rotary laser level, the method comprising:

actuating a drive system to level a laser assembly of a base unit of the rotary laser level;

emitting a laser beam from the rotating laser assembly after the laser assembly has been leveled;

detecting a first beam center position of the emitted laser beam using a portable receiving unit;

determining an initial level position for the laser assembly at the first beam center position;

fixing the receiving unit at the first beam center position;

rotating the base unit so the laser assembly is pointing away from the receiving unit;

actuating the drive system to level the laser assembly after the base unit has been rotated;

actuating the drive system to moved the laser assembly until the laser beam is centered on the receiving unit;

determining a current level position of the laser assembly after the laser beam has been centered on the receiving unit;

comparing the current level position to the initial level position; and

determining a state of calibration of a level position of the laser assembly based on the comparison.

2. The method of claim 1 , further comprising:

determining whether the current level position is within a predefined limit of the initial level position based on the comparison.

3. The method of claim 2 , further comprising:

determining that calibration is complete if the current level position of the laser assembly is within the predefined limit from the initial level position.

4. The method of claim 3 , further comprising:

adjusting the drive system of the laser assembly if the current level position of the laser assembly is outside the predefined limit from the initial level position;

actuating the drive system to level the laser assembly after the adjustment;

emitting the laser beam from the rotating laser assembly after the laser assembly has been leveled;

detecting the first beam center position of the emitted laser beam using a portable receiving unit;

determining the initial level position for the laser assembly at the first beam center position;

fixing the receiving unit at the first beam center position;

rotating the base unit so the laser assembly is pointing away from the receiving unit;

actuating the drive system to level the laser assembly after the base unit has been rotated;

actuating the drive system to moved the laser assembly until the laser beam is centered on the receiving unit;

determining the current level position of the laser assembly after the laser beam has been centered on the receiving unit;

comparing the current level position to the initial level position; and

determining the state of calibration of the level position of the laser assembly based on the comparison.

5. The method of claim 1 , wherein the self-leveling system base unit includes a self-leveling device for indicating a reference position of the laser assembly.

6. The method of claim 5 , wherein the self-leveling device comprises a pendulum.

7. The method of claim 6 , wherein the laser assembly includes a drive system that is configured to move the laser assembly in relation to the base unit, and

wherein the control system is configured to operate the drive system based at least in part on the reference position indicated by the self-leveling device.

8. The method of claim 7 , wherein the control system is configured to automatically adjust the drive system if the current level position is outside the predefined limit from the initial level position.

9. The method of claim 1 , further comprising:

automatically transmitting the initial level position and the current level position to the control unit of the base unit.

10. The method of claim 9 , wherein the receiving unit and the control system are configured to communicate using radio frequency (RF) signals.

11. The method of claim 10 , wherein the receiving unit is configured to transmit a position signal to the control system, and

wherein the control system is configured to actuate the drive system to move the laser assembly based on the position signal.

12. A rotary laser level comprising:

a base unit including a laser assembly for emitting a laser beam, a drive system for controlling a position of the laser assembly in relation to the base unit, a self-leveling device for indicating a reference level position, and a control system for actuating the drive system based in part on the level position; and

a portable receiving unit including a laser detection system, a position detection system, and a wireless communication system,

wherein the control system of the base unit is configured to perform a method of calibrating the level position of the base unit, the method comprising:

actuating a laser assembly of a base unit of the rotary laser level to perform a self-leveling process;

actuating the laser assembly to emit a laser beam from the self-leveled position after the self-leveling process;

receiving a first signal from the receiving unit indicating a first beam center position of the laser beam;

determining an initial level position in response to receiving the first signal;

actuating the drive system to return the laser beam to the beam center position in response to the base unit being rotated after receiving the first signal;

receiving a second signal from the receiving unit indicating a second beam center position;

determining a current level position in response to receiving the second signal; and

comparing the current level position to the initial level position to determine a state of calibration of the level position of the laser assembly.

13. The rotary laser system of claim 12 , wherein the control system of the base unit and the receiving unit are configured to communicate wirelessly.

14. The rotary laser system of claim 13 , wherein the control system of the base unit and the receiving unit are configured to communicate using radio frequency (RF) signals.

15. The rotary laser system of claim 12 , wherein the self-leveling device comprises a pendulum.

16. The rotary laser system of claim 12 , wherein the receiving unit is configured to transmit a position signal to the control system, and

wherein the control system is configured to actuate the drive system to move the laser assembly based on the position signal.