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In the electronic counting machine in the 1970s, Europe has been widely used. In China, when the socio-economic system and the market were relatively closed, it was impossible to see such an "artifact". Because at that time China's basic method of counting pills, candy and granules was still in the way of counting tablets and counting by hand, which was very crude and unhygienic.
At the time in Europe, when using this electronic counting machine, the real starting point was to solve the fatigue of the workers, and it was not developed like the "noble scientific theme" such as reducing labor and compression costs. The development of electronic counting machine is a small electronic counting machine.
The first electronic counting machine:
Is a small electronic counting machine, the volume is only the size of a desktop computer, can be said to be an electronic meter, mainly using the photoelectric counting sensor principle, used for counting small moving objects, due to its high speed, Non-contact measurement has the advantage of not requiring high drop position of objects, so it is widely used in seed counting machines in agricultural instruments.
The second generation photoelectric counting machine:
It was not formally applied to the pharmaceutical industry until the end of the 1970s. We call it the first generation of photoelectric counting machines. Maybe, I prefer to call it a fully automatic electronic counting machine. Why do you say that? Because the research and development and innovation are based on the original seed count, the real meaning is a leap in the number of high-speed counts. It is a practical solution to labor, reduce the use cost, and also fully realize the full automation of mechanical packaging equipment outsourced by the pharmaceutical industry.
At that time, the technical working principle was: through the initial adjustment of the vibrating feeding plate, the medicine particles in the hopper continuously vibrated forward along the track of the vibration plate, until it fell from the front photoelectric detection channel and touched the photoelectric sensor to start working and counting. After a predetermined number, the feeding port is closed by a PLC signal to the electrical valve, and the good medicine particles fall on the bottle of the outlet to implement the counting function. (Many domestic manufacturers of counting machines also basically use this To complete this form), the mechanical part is controlled by servo motor and cylinder. ), This way the use of the pharmaceutical industry is the most popular.
Disadvantages: This method can't get the error rate and speed of counting. Because the PLC uses a single machine to execute instructions in series, the speed cannot be fast, and the infrared pulses are scanned in a single line. The implementation of the photoelectric counting and counting machine in the true sense is because the labor cost has increased several times in recent years, and the pharmaceutical factory has once again put forward higher requirements for the counting capacity of the counting and counting machine, and these two cores Point: The speed of the counting machine should be faster, and the accuracy should be higher.
The third generation photoelectric (3D) counting machine
With the promotion of customer's application requirements, the true photoelectric counting machine was born in 2009. Since its application, it is also the customer satisfaction and the best counting machine. What is the difference between the first generation of photoelectric counting machine?
First: The software system for counting grains should be changed to FPGA, which is also the most popular software system currently used in aviation technology. The most advanced features are radiation resistance, high performance, and low power consumption.
FPGA can restructure the hardware structure and working mode through software programming. Modifying the software program is equivalent to changing the hardware, which is fast and reliable. Practice has proven that FPGA software systems have the following advantages:
1. Realize parallel work on hardware, which has a bright future in real-time measurement and control and high-speed applications;
2, FPGA devices are implemented in software for function development, but the physical mechanism is as reliable as pure hardware circuits.
3. The high reliability of the FPGA just overcomes the problems of innate lack of flying and the low accuracy of counting when using other MCUs. As well as the use of a PLC single machine, the serial execution of instructions is not fast. Introduce mature high-speed electronic digital chip technology from well-known manufacturers in Taiwan. Based on FPGA high-speed microprocessor technology and full Chinese dynamic graphics display operating system, parameters can be set or adjusted on the system.
4, automatic fault diagnosis and real-time monitoring alarm display system, and can store multiple sets of parameters, you can call directly when replacing the product.