When the rice flows slowly from top to bottom along the slide automatically set by the machine, the high-speed optical camera lenses hidden on both sides of the slide will automatically collect the color information of the rice.
Once it is found that there are abnormal rice grains with different colors, shapes and heads from healthy rice, the camera will instantly capture them for imaging and lock the target. At this time, the light signal is converted into an electrical signal. After receiving the signal, the high-frequency solenoid valve device immediately turns on the air flow switch, and the driver will drive the ejector to eject high-speed and short air flow, which will quickly remove the impurities mixed in the rice grains.
In fact, rice has already experienced a lot of tempering inside the high-speed color sorter, which has compound eyes like a dragonfly.
Basic process of rice color sorting
The process of grain processing includes cleaning, stone removal, bran separation, rice milling, magnetic separation, rice milling, polishing, photoelectric color separation and so on.
One of the key quality control points in rice processing is to remove the stone. In the process of rice processing, the rice will be strictly screened by metal detector, which is an important step to remove physical hazards, metal foreign bodies and magazine residues. The metal detector can detect ferrous metals and non-magnetic metals, with high sensitivity and strong anti-interference ability.
According to the difference of optical properties of rice, the rice color sorter uses photoelectric technology to automatically sort out the different color particles in rice, so as to improve the quality of rice and remove impurities.