In the 1970s, electronic counting machines were already widely used in Europe. In China, with its social and economic system and relatively closed markets at the time, it was impossible to see such “artifacts”. Due to the fact that at that time, the basic counting method for drugs, candies, and granules in China was still based on counting tablets and manual counting, which was very simple and unhygienic.
At that time, in Europe, the real starting point of using this electronic particle counting machine was to deal with labor fatigue, rather than being developed for the “noble scientific research theme” of reducing labor and reducing costs. Therefore, the embryonic development of the electronic particle counting machine at that time was a small electronic particle counting machine.
First generation electronic counting machine:
It is a small electronic particle counting machine, with a volume only the size of a desktop computer, and can be said to be an electronic appearance. It mainly uses the principle of photoelectric particle counting sensors and is used for counting small moving objects. Due to its high speed, non touch measurement, and low requirements for the falling direction of objects, it is widely used as a seed counting machine in agricultural instruments.
Second generation photoelectric counting machine:
It was not until the late 1970s that it was officially used in the pharmaceutical industry, and we call it the first generation of photoelectric counting machines. Perhaps I prefer to call it a fully active electronic particle counting machine, why do I say so? Due to its development and transformation based on the original number of seeds, the true meaning is a leap in the quantity of high-speed seeds. It is a practical solution to labor, reduce operating costs, and fully achieve the full automation of mechanical packaging equipment for pharmaceutical outsourcing.
At that time, the technical working principle was to adjust the oscillation feeding plate initially, so that the medicine particles in the hopper continued to oscillate forward along the trajectory of the oscillation plate until they fell from the front photoelectric detection channel and pulled the photoelectric sensor to start working and counting. When the medicine particles reached the predetermined quantity, the PLC sent a signal to the electrical valve to close the feeding port, and the counted medicine particles landed on the bottle at the outlet to complete the counting function, At present, many domestic granulator manufacturers also use this method to complete the mechanical part, which is controlled by servo motors and cylinders, This method is widely used in the pharmaceutical industry.
Disadvantage: This method cannot improve the accuracy and speed of counting particles. Due to the use of PLC single machine and serial command execution, the speed cannot be fast, and infrared pulse single line scanning. The implementation of the photoelectric counting machine in the real sense is due to the several times increase in labor costs in recent years, and pharmaceutical factories have once again put forward higher requirements for the counting ability of the counting machine. There are also two central points: the speed of the counting machine needs to be faster and the accuracy needs to be higher.
Third generation photoelectric (3D) counting machine
With the promotion of customer usage requirements, the true photoelectric counting machine was born in 2009, and has been used to this day with customer satisfaction and good usage. So, what is the difference between this photoelectric (3D) counting machine and the previous first generation of photoelectric counting machines?
1： The software system for counting particles needs to be changed to FPGA, which is currently widely used in aviation technology. The advanced features are radiation resistance, high performance, and low power consumption
FPGA can reconstruct the structure and working methods of the hardware through software programming, and correcting the software program is equivalent to changing the hardware, with fast speed and high reliability. Practice has proven that the FPGA software system has the following advantages:
- Complete parallel work on hardware, with broad prospects in the fields of real-time measurement and high-speed use;
- FPGA equipment is developed using software, but its physical mechanism is the same as pure hardware circuits, making it very reliable
- The high reliability of FPGA just overcomes the current use of MC by other manufacturers