Particle Analysis
10Pages

Optical particle analyzer OAX OAX-100

General information The OAX-100 separation system includes the optical camera installed inside the analyzer cover box. The material is supplied on the top by a vibro-feeder when used in the laboratory or is taken directly from the process when the unit is installed on-line. The images are taken by the system in dynamic conditions (movingparticles image). This system is operated by a PC based analyzing package employing a sophisticated software algorithm. Each particle is identified in terms of the material type or combination of materials, its dimension, shape, structure and its position in...

Operating principle ProcessCameraImage processing system Background (optional) Dust control unit

Particle identification stages Image digitizing Particle geometry described by over 50 parameters (diameter, area, perimeter, elongation, hydraulic radius, moment of inertia etc.) Digital filtration: by geometrical parameters, morphology analysis, FFT filtration, shape matching, color matching, color pattern matching ect ect. Statistical processing of data and result sorting Display of the required result type (particle groups) Saving of the processed data

Example of the processed particle group

Most frequently used parameters regarding tyhe particle shape Height of the bounding rectangle in user calibrated units.Height (unit)Width of the bounding rectangle in user calibrated units.Width (unit)Bottom Y coordinate of the bounding rectangle.Lower row (Y)Right X coordinate of the bounding rectangle.Right column (X)Top Y coordinate of the bounding rectangle.Upper row (Y)Left X coordinate of the bounding rectangle.Left column (X)Y coordinate of the center of gravity.Center of mass YX coordinate of the center of gravity.Center of mass XRatio of a particle’s surface area to the total...

Most frequently used parameters regarding tyhe particle shape Direction of the longest segment. Particle orientation Length of the chords in an object perpendicular to its max intercept. Mean intercept perpendicular Length of the longest segment in a particle (in all possible directions the projection). Max intercept Mean length of vertical segments. Mean chord Y Mean length of horizontal segments. Mean chord X Inertia matrix coefficient in xy. Moment of inertia Ixy Inertia matrix coefficient in yy. Moment of inertia Iyy Inertia matrix coefficient in xx. Moment of inertia Ixx Sum of the...

Most frequently used parameters regarding tyhe particle shape Diagonal of an equivalent rectangle in user calibrated units. Diagonal (unit) Diameter of the disk that has the same area as the particle in user calibrated units. Waddeldisk diameter (unit) Particle area to the particle perimeter. Hydraulic radius (unit) Complex factor that relates the surface area to moment of inertia. Type factor Ratio of an object's perimeter to the perimeter of the circle within the same area. Heywood circularity factor Ratio of an object area to the area of the smallest rectangle containing the object....

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