Principle of photoelectric automatic counting instrument

There are two types of photoelectric automatic particle counting machines: PME photoelectric automatic particle counting device, PME-1 photoelectric automatic grain counting device. The former PME is suitable for seed size seeds, just like SLY-C electronic automatic counting instrument function is similar, while PME-1 can only measure small seeds, such as vegetables, flowers, tobacco and other seeds. The PME type seed counting instrument has been widely used, and is used when it is necessary to determine the 1000-grain weight of seeds in the laboratories, the grain department, and the seed inspection department of the Academy of Agricultural Sciences, agricultural universities and colleges, the seed sector, and the PME seed counting instrument. Count grains of various food crops such as rice, wheat, and corn.

The working principle of PME photoelectric counting instrument is like this: After putting the seeds into the electromagnetic vibrating box, the seeds are lined up to the feeding port, and then the seeds will enter the photoelectric conversion tank. At this time, the kinetic energy of the seeds will be converted into photoelectric pulses. The pulse enters the counting circuit through a series of inverted phase rectifications to achieve counting, and then displayed with LED digital tube.

PME photoelectric automatic particle counting instrument has a preset seed quantity function. Preset dial switch is used. When the particle count reaches the preset number, the instrument automatically stops feeding and stops counting. There is also a self-check frequency that automatically detects the correctness of the counting circuit and the preset system.

The counting deviation of the PME type seed counting instrument is: ±4/1000 depending on the speed, the counting speed is More than 1000 pellets/3 minutes for small particles; the maximum particle count is 500 pellets/3 minutes, and it can count up to 9999 pellets, and it can adapt to most of the grain And the technical needs of the seed sector.