Take you to understand how the Guangdong self-service vending machine recognizes one yuan coin

Take you to understand how the Guangdong self-service vending machine recognizes one yuan coin? The self-service vending machine is a product of modern technology. We know that it brings a lot of convenience to our lives and adds more colors to our lives. So how does the self-service vending machine recognize one yuan coin? The following technology will explain to you : Identification principle The main identification indicators: diameter, material, thickness. The material is measured electromagnetically. Air-core coils or magnetic core coils are used. There is only one set of coils with a small number of coils, and six sets with more coils. Under working conditions, the coil and its peripheral circuit will oscillate at a special frequency (multiple coils have different frequencies). When the coin passes through perpendicular or parallel to the plane of the coil (different products have different ways), it will cause oscillations. Frequency changes. The frequency change amplitude and direction (increase, decrease) caused by different materials are also different. After the change characteristics of a certain coin are recorded, it becomes the basis for identifying the coin in use. The thickness is not measured specifically, in fact this indicator is measured together with the material. Because even coins of the same material, if the thickness is different, the resulting frequency change will be greater. Diameter-The old-fashioned identification device uses photoelectric tube array to identify the diameter. If the arrangement and combination are proper, the identification accuracy is not low (0.5mm can be answered). The newer ones are measured with eccentric or special-shaped coils, based on the fact that the coin with a small diameter has less overlap with the coil, which also brings about a different frequency change. The metal raw materials of the 1 yuan, 5 jiao and 1 jiao coins currently issued in our country are special alloys specially used for coinage. Therefore, they enter the magnetic field generated by the specific high-frequency oscillation circuit composed of inductors and capacitors through the coin entrance. At this time, the difference in metal material and volume has a slight difference in the influence of the inductance, and the change in inductance causes a change in the oscillation frequency; then by detecting the change in frequency, comparing it with the set value, after determining a certain coin type, The frequency signal is converted into a voltage signal output by a narrowband frequency selection circuit to complete the identification of metal coins. There are many types of metal coin recognizers, but the coin storage and return mechanisms are basically divided into two types: the type is flat coin storage, solenoid valve Refund; The type is cylindrical coin storage, and the stepping motor returns the coin; when the coin is inserted and the electrical signal is recognized, the counterfeit coin and foreign matter are discharged, and the real coin is distributed to different storage by several groups of distributed solenoid valves according to the face value. The coin cavity is reserved for use. After receiving the electronic signal for returning the coin, the coin in the lower part of the coin storage cavity is pushed out according to the electrical signal program through the return solenoid valve or the coin return motor lever, and the coin return and change function of the vending machine is completed. .Do you have any questions when you see this? A small vending machine, but the technology is not small? Here, we recommend you to learn more about unmanned vending machines in Dongguan, vending machines in Guangdong, etc., and hope to help you! Previous: Discuss the business model of Guangdong vending machines Next: Talking about the hidden truth behind Guangdong vending machines