Abstract: A method of detecting a laser beam emitted by a laser tool includes receiving light via an optical window of a receiver unit, and directing the light received via the optical window onto a first light sensor array and a second light sensor array. At least one signal is output from the first light sensor array indicating a characteristic of the light incident upon the first light sensor array. At least one signal is output from the second light sensor array indicating a characteristic of the light incident upon the second light sensor array. The at least one signal from the first light sensor array and the at least one signal from the second light sensor array are processed with respect to each other to produce a measurement signal. A determination is then made whether the received light is a laser beam emitted by the laser tool based on the measurement signal.

Abstract: A method of operating a rotary laser level includes actuating a drive system to level a laser assembly of a base unit of the rotary laser level, and emitting a laser beam from the rotating laser assembly after the laser assembly has been leveled. A first beam center position of the emitted laser beam is detected using a portable receiving unit. An initial level position is determined at the first beam center position, and the receiving unit is fixed at the first beam center position. The base unit is then rotated so the laser assembly is pointing away from the receiving unit and the laser assembly is leveled again. The laser beam is then centered on the receiving unit again and a current level position is determined. The current level position is compared to the initial level position to determine a state of calibration of a level position of the laser assembly based on the comparison.

Abstract: A theft detection method for a rotary laser tool includes using a motion sensor incorporated into a base unit of the rotary laser tool to detect movement of the base unit, monitoring duration of movement of the base unit as indicated by the motion sensor using a control system of the rotary laser tool, and activating an alarm indicator in response to the duration of movement being greater than a predefined threshold.

Abstract: A method of detecting a laser beam emitted by a laser tool includes receiving light via an optical window of a receiver unit, and directing the light received via the optical window onto a first light sensor array and a second light sensor array. At least one signal is output from the first light sensor array indicating a characteristic of the light incident upon the first light sensor array. At least one signal is output from the second light sensor array indicating a characteristic of the light incident upon the second light sensor array. The at least one signal from the first light sensor array and the at least one signal from the second light sensor array are processed with respect to each other to produce a measurement signal. A determination is then made whether the received light is a laser beam emitted by the laser tool based on the measurement signal.

Abstract: A method of operating a rotary laser level includes actuating a drive system to level a laser assembly of a base unit of the rotary laser level, and emitting a laser beam from the rotating laser assembly after the laser assembly has been leveled. A first beam center position of the emitted laser beam is detected using a portable receiving unit. An initial level position is determined at the first beam center position, and the receiving unit is fixed at the first beam center position. The base unit is then rotated so the laser assembly is pointing away from the receiving unit and the laser assembly is leveled again. The laser beam is then centered on the receiving unit again and a current level position is determined. The current level position is compared to the initial level position to determine a state of calibration of a level position of the laser assembly based on the comparison.

Abstract: A theft detection method for a rotary laser tool includes using a motion sensor incorporated into a base unit of the rotary laser tool to detect movement of the base unit, monitoring duration of movement of the base unit as indicated by the motion sensor using a control system of the rotary laser tool, and activating an alarm indicator in response to the duration of movement being greater than a predefined threshold.

Abstract: The invention provides a pipe laser that automatically self levels an inner frame system in both cross-axis and on-axis directions to provide a completely level reference for grade and line control adjustments mechanisms of a reference line generating laser source. The invention also provides a pipe laser that is operable via a bidirectional remote control.

Abstract: The invention provides a pipe laser that automatically self levels an inner frame system in both cross-axis and on-axis directions to provide a completely level reference for grade and line control adjustments mechanisms of a reference line generating laser source. The invention also provides a pipe laser that is operable via a bidirectional remote control.