Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Switching device, switch control method, and storage system
Dynamic trunk distribution on egress
Socket type MEMS device with stand-off portion
Systems and methods for performing live chat functionality via a mobile device
Biosensor kit
Audiovisual multi-room support
Resin composition and molded article
  Randomly Featured Patents
Method for removal of contaminants from surfaces
Signal attenuators
Specifying arbitrary words in rule-based grammars
Active matrix panel
Mass production testing of USB flash cards with various flash memory cells
Chain saw tip stabilizing device for use with an antikickback device
Information recording and retrieval apparatus
Elastically stretchable fabric force sensor arrays and methods of making
Reconfigurable display stand
Liquid crystal display device