Particle size distribution measurement on aggregate conveyors
Crushed stone flowing on an inclined belt is scanned by a laser profile sensor. A distribution is built from equivalent diameters of particles segmented in the height map; an oversize or fines fraction above its limit triggers a crusher-adjustment warning.
Particle distribution and oversize fraction are monitored on the operator display; a limit exceedance is sent to the stack light and line control to request review of the crusher setting.
- 01 Infeed
- 02 Acquire
- 03 Analyse
- 04 Decide
Crushed stone advances to the sensor on the inclined belt.
- Illustrative median diameter
- —
- Oversize fraction
- —
Scenes are illustrative simulations; they are not customer references or performance guarantees.
Need
Stones overlap, cast shadows and vary the belt load. Adjacent particles may appear merged in a colour image; the height of the bed affects particle boundaries.
Solution approach
A gantry-mounted 3D sensor scans the belt with transverse laser profiles. Peaks and boundaries are separated in the height map built from belt travel; equivalent diameters of visible particles are calculated to assess the distribution and oversize fraction.
Process steps
- 01
Infeed
Crushed stone advances to the sensor on the inclined belt.
- 02
Acquire
Transverse laser profiles are combined with belt travel.
- 03
Analyse
Visible particle boundaries and equivalent diameter distribution are calculated.
- 04
Decide
The oversize fraction is compared with its limit; a warning is sent to line control.
Related applications
Let us assess your application together
We test your sample in our laboratory and report on resolution, optics and lighting selection.