System and method for controlling a light projector in a construction site

A system for projecting a portion of a construction plan within a construction site, the system comprising:

• a light projector configured to project an image associated with the portion of the construction plan onto at least one specific surface within the construction site, by projecting a set of vectors, starting at an XYZ position within the light projector and ending at respective XYZ coordinates;
• at least one sensor configured to record at least some of:
• a set of XYZ coordinates of the at least one specified surface, and a set of XYZ coordinates of the image as projected on the at least one specific surface;
• and
• a computer processor configured to:
• derive, from the construction plan, an intended projection portion which comprises visual content and dimensional data intended to be projected on the at least one specific surface which also appears in the construction plan;
• calculate XYZ coordinates for the intended projection portion, based on the construction plan and the XYZ position of the light projector;
• compare the XYZ coordinates recorded by the sensor with the XYZ coordinates for the intended projection portion, to detect respective XYZ displacements;
• generate a modified projection portion based on the detected respective XYZ displacements,
• wherein the light projector is further configured to project said modified projection portion onto the specific surface,
• wherein the light projector comprising:
• a support structure;
• a moveable platform connected to the support structure, wherein the moveable platform is configured to rotate at least one two-axis electro-optic deflection unit mounted on the moveable platform;
• and
• at least one light source coupled to the two-axis electro-optic deflection unit configured to project a light beam, wherein steering of the light beam is carried out by operating at least one of:
• the two-axis electro-optic deflection unit, and the moveable platform.

A system for projecting a portion of a construction plan within a construction site, the system comprising:

• a light projector configured to project an image associated with the portion of the construction plan onto at least one specific surface within the construction site, by projecting a set of vectors, starting at an XYZ position within the light projector and ending at respective XYZ coordinates;
• at least one sensor configured to record at least some of:
• a set of XYZ coordinates of the at least one specified surface, and a set of XYZ coordinates of the image as projected on the on the at least one specific surface;
• and
• a computer processor configured to:
• generate, based on the construction plan, and the XYZ coordinates recorded by the sensor, an “as built” model representing surfaces and elements as built in the construction site;
• derive, from the construction plan, an intended projection portion which comprises visual content and dimensional data intended to be projected on the at least one specific surface which appears in the construction plan and/or in the “as built” model;
• calculate XYZ coordinates for the intended projection portion, based on the “as built” model and the XYZ position of the light projector,
• wherein the light projector is further configured to project said intended projection portion onto the at least one specific surface,
• wherein the light projector is further configured to steer a light beam between at least some of the vectors, thereby projecting the image by scanning the light beam.