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Laser projection system and method with motion compensation

A laser projector, projection technology, used in active optical measurement devices, components using optical devices, color TVs, etc.

Active Publication Date: 2018-11-20
VIRTEK VISION INT ULC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

An exception is disclosed in published PCT application WO 201213645 by Keitler et al., which states that its disclosed dynamic tracking method can be used with video or laser projectors; however its disclosed method relies on uniquely configured targets that have not been proven commercially viable for

Method used

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  • Laser projection system and method with motion compensation
  • Laser projection system and method with motion compensation
  • Laser projection system and method with motion compensation

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Embodiment Construction

[0020] As noted previously, in the Background section and in the inventor's U.S. Patent No. 5,646,859, current commercial component laser projection systems include a laser projector 20 and a laser projector in a fixed position relative to a workpiece or work surface 24 multiple (at least four) targets (which are usually reflective targets)22, as figure 1 as shown in. The laser projector 20 periodically scans each target 22 in order to locate the position of the laser projector relative to the tool through the resection process. Calculations can be made on the laser projector scanning mirror to trace the laser point across the desired stencil pattern on the known three-dimensional profile of the tool. However, this method has several disadvantages, including that the projection of the template on the tool must be interrupted in order to confirm the relative position of the laser projector to the tool surface, and it cannot correct for the more dynamic behavior of the laser pr...

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Abstract

A method of accurately projecting a laser image pattern on a work surface and continuously compensating for relative dynamic movement between the laser and the work surface, including establishing a position of the camera in three dimensions relative to the work surface by locating the targets in the camera image, establishing a position of the laser relative to the work surface utilizing the fixed position of the laser relative to the camera, and using a computer to continuously adjust the rotation of the laser projector mirrors in response to dynamic movement of the laser projector relative to the work surface as determined by the camera. In one embodiment, the computer continuously tracks at least two prior locations of the laser projector relative to the work surface and predicts the next location of the laser, compensating for movement of the laser relative to the work surface.

Description

[0001] related application [0002] This application claims priority to Provisional Patent Application Serial No. 61 / 757,412, filed January 28, 2013. technical field [0003] The present application relates to a method of precisely projecting a laser image onto a target or work surface and continuously compensating for relative dynamic movements between the laser projector and the surface of the target. Background technique [0004] Currently, laser projectors are utilized to assemble components on a work surface, such as components of a truss, as disclosed in the inventor's US Patent No. 5,646,859. At least four targets (which are typically reflective targets) are fixed relative to the work surface, and the laser projector periodically scans each target in order to calibrate the relative position between the work surface and the laser projector. This is currently done by measuring the target coordinates relative to the tool's coordinate system and then using resection proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/00G01C15/00G01B11/25
CPCG01B11/25G01C11/00G01C15/002G06T7/73H04N9/3185G06T7/292
Inventor K·D·鲁博
Owner VIRTEK VISION INT ULC