Resources Contact Us Home
Optical glass sorting machine and method

Image Number 3 for United States Patent #6144004.

A glass sorting machine optically sorts glass cullet according to different color characteristics by irradiating the cullet with red, green and blue light as the cullet are passed through a sensing region between a light source and light sensors responsive to the different light colors. The attenuation levels of the different light colors are measured by the sensors as the cullet passes through the sensing region. The machine analyzes the attenuation levels to determine the color characteristics of the cullet. A collimator is typically used to enhance shadow definition. In one embodiment, a pixel grid map is made of the sensing region and each cullet that passes through the sensing region. Mapped on to each grid is a red, green, and blue digital signal. Attenuated signals are compared against baseline values to determine the attenuation for given cullet. The pixel grid map may be used with a data erosion technique to compensate for refraction. To reduce errors associated with optical impurities, the machine normalizes the baseline values when cullet are not in the sensing region by taking the derivative of the sensed signal and normalizing the baseline signal when no cullet are present.Another embodiment of the invention further employs infrared wavelength light to better sort ceramics as well as visibly transparent glass that is infrared opaque.

  Recently Added Patents
Processing autocomplete suggestions
Routing of data including multimedia between electronic devices
Cooling method and device for cooling a medium-voltage electrical installation in a protective sheath
High power fiber amplifier with stable output
High sensitivity stress sensor based on hybrid materials
Frame syncrhonization in orthogonal frequency-division multiplexing systems
  Randomly Featured Patents
Airfoil cooling passage trailing edge flow restriction
Microelectromechanical system having movable element integrated into substrate-based package
Methods, systems, and media for generating a regression suite database
Slipring-less claw-pole generator
Assigning code space to portable base stations
Electronic delay detonator
Bonding method employing tie layers for adhering polyethylene to fluoropolymers
Per user and network routing tables
Rapamycin peptides conjugates: synthesis and uses thereof
Non-concentricity compensation in position and orientation measurement systems