Measuring OD of Hardwood Logs Using Laser Measuring Sensors and LEDs

Smart Vision Lights has been able to automate the measurement of the OD of hardwood logs (minus the bark) that are cut to length. Upon knowing the diameter, it would be possible to determine the number of board feet in the log.

The aim was to develop a user-friendly interface to a system that can operate in all kinds of weather and lighting conditions. Inspection Setup - Vision Camera: Microsan 5 MP CCD GigE; Illumination: XR256-IR light is set to strobing.


Alongside Casey Seagraves, it was easy to find a light that would offer a bright field image in all kinds of outdoor lighting conditions. The XR256 IR light was used with a Microscan 5 MP gigE camera, an IR band pass filter, IFM laser measuring sensors, and Smart Vision Lights’ custom software. The evaluation was performed by eSolutions.

Application Images

Vision Technology Aids Lumber Company

It is necessary for the lumber mill owners to quickly and accurately determine the number of boards that can be produced from the raw lumber procured from the timber suppliers. For a long time, those figures have been determined manually and were not completely accurate.

However, eSolutions of Lafayette, IN, has created a vision-based wood trimming system. According to an article recently published in Vision Systems Design, Pike Lumber, of Akron, IN, requested eSolutions to develop a vision-based system to automatically carry out log diameter measurement.

The system was mounted on the front part of a Tigercat 240B loader, thus enabling the operator to ascertain the diameter of each log and thereby the board feet measure, with assistance from a Visionscape GigE camera from Microscan and laser sensors.

Since the system was intended to run in various types of environmental conditions, Smart Vision Lights’ XR256 Series strobe light was used to illuminate the faces of the logs. Greg Hilbert, eSolutions president, stated that the use of this illumination system and an IR bandpass filter on the camera enabled the operators to minimize the amount of ambient lighting captured by the camera.

This information has been sourced, reviewed and adapted from materials provided by Smart Vision Lights.

For more information on this source, please visit Smart Vision Lights.

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