Calibration Procedure

You are currently viewing the documentation for the latest version (2.5.0). To access a different version, click the "Switch version" button located in the upper-right corner of the page.

■ If you are not sure which version of the product you are currently using, please feel free to contact Mech-Mind Technical Support.

In industrial production, multiple laser profilers may be deployed together to scan the target object, thereby expanding the field of view and eliminating visual blind spots. The laser profilers should be calibrated before scanning the same target object. The calibration procedure includes arranging the calibration target and laser profilers, adjusting parameters and calibrating.

Arrange Calibration Target and Laser Profilers

Prepare for calibration following these steps.

  1. Arrange the calibration target and laser profilers, and ensure that:

    • The laser projected by the laser profiler is perpendicular to the surface of the frustum.

      light perpendicular to base
    • The frustum is positioned at the center of the laser profiler’s FOV.

      centered ok

      centered ng

      ok icon

      ng icon

    • Four edges of the frustum are parallel to the emitted laser lines.

      no rotation

      rotated

      ok icon

      ng icon

    • The foundation surface of the calibration target is positioned at the laser profiler’s reference distance (RD as shown in the figure).

      reference distance
      If on-site conditions are limited, you can slightly move the calibration target upward toward the laser profiler.
  2. Determine the scan range: The distances from the scan start and end positions to the edges of the frustum’s lower base should both be greater than half the lower base length. In other words, both the scan start and end positions should fall within the blue areas of the target object, as shown in the table below.

    After determining the scan range, adjust the translation stage so that the laser light emitted by the laser profiler falls on the scan start position. This facilitates data acquisition and data quality evaluation during parameter adjustment.

    Layout

    Side-by-side

    Reverse

    Illustration

    wide side by side no label

    wide reverse 1 no label

    Scan start and end positions

    start end of scan 1

    start end of scan 2

    The laser profiler on the left in the figure above

    start end of scan 3

    The laser profiler on the right in the figure above

  3. Clean the surfaces of the calibration target and the windows of the laser profiler to prevent dust and stains from affecting data quality.

  4. Ensure that there are no reflective objects near the calibration target that could interfere with data acquisition. If any are present, remove or cover them.

Adjust Parameters

Adjust parameters for each laser profiler according to the guide.

Calibration

Follow the steps below to perform calibration:

  1. Warm up: After powering on the device, continuously acquire data for over one hour under actual production conditions using the adjusted parameter group.

  2. Calibrate multiple laser profilers:

    • If using the Mech-MSR software, first select a calibration scene, and then follow the instructions to complete calibration.

      During calibration, refer to Workflow of Triggering Data Acquisition to acquire data.

    • If using Mech-Eye API, refer to the sample MultipleProfilersCalibration.

      • The moveDirSign parameter in the sample is determined by the motion direction of the target object relative to the laser profiler:

        Motion direction of the target object

        sensor to emitter

        From sensor to laser emitter

        emitter to sensor

        From laser emitter to sensor

        moveDirSign parameter value

        True

        False

Is this page helpful?

You can give a feedback in any of the following ways:

We Value Your Privacy

We use cookies to provide you with the best possible experience on our website. By continuing to use the site, you acknowledge that you agree to the use of cookies. If you decline, a single cookie will be used to ensure you're not tracked or remembered when you visit this website.