Patents Assigned to VisionWorks LLC
  • Patent number: 6960756
    Abstract: A system and method for measuring the size, shape and distribution of particles wherein a digital image analysis based optical system characterizes the particle size distribution of granular and cohesion-less materials. The size and shape information is obtained in real time. Such an automated analysis system comprises the following four major components: 1) particle sizing hardware and software, 2) progressive scan CCD camera and stepper motor driven optical zoom system with large magnification ratio, 3) horizontal vibrating feeder, and 4) appropriate lighting system. In operation, the vibratory feeder allows the tested material free fall in front of the CCD camera. The backlight provided by a DC lighting system projects the free falling particles onto the camera's image plane. Pictures from free falling material are captured and transferred into the computer through a video frame grabber.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: November 1, 2005
    Assignee: VisionWorks LLC
    Inventors: Dayakar Penumadu, Rongda Zhao, Erich F. Steadman