Dongguan vending machine manufacturer: How do vending machines recognize coins?

The unmanned self-service vending machine of Dongguan vending machine manufacturer is a kind of self-service equipment that is unmanned. It is similar to the current self-service teller machine. However, one is for depositing money and the other is for selling goods. Usually this kind of self-service vending machine realizes buying and selling through coin insertion, so how does it recognize coins? The material of the vending machine is measured by electromagnetic method. Air-core coils or core coils are used. The number of coils is generally 1 group, and the number of coils is generally 6 groups. In the working state, the coil and its surrounding circuits oscillate at a special frequency. When the coin passes through the coil surface vertically or parallel, the oscillation frequency changes. The width and direction (increase or decrease) of the frequency change vary from material to material, and the characteristics of recording coin changes are the basis for identifying coins during use. At present, the one dollar, fifty cents, and one cent issued in China are all metal materials, which are special alloys used to make currency. Therefore, through the input port, when entering the magnetic field generated by the specific high-frequency oscillation line composed of inductance and capacitance, the difference in metal material and volume will have a slight difference in inductance. The change in inductance will change the oscillation frequency. By detecting the change of the frequency and comparing it with the set value, after determining a certain coin, the frequency signal is converted into a voltage signal output by the narrowband frequency selection circuit, and the identification of the metal coin is completed. Dongguan vending machine manufacturer The above is about the Guangdong grid machine manufacturer: how the vending machine recognizes coins, I hope it will be helpful to everyone. The emergence of unmanned self-service vending machines not only facilitates more people, but also reflects the development of my country's technological level. It is believed that products that are closer to people's living habits will be produced in the near future. That's it for this time, see you next time. Previous: Guangdong vending machine manufacturers: What are the advantages of vending machines compared with physical stores? Next: Guangdong lattice machine manufacturer: How to operate and manage the vending machine?