How to distinguish the authenticity of coins from vending machines

The coin identification module in the unmanned vending machine is a set of very accurate instruments, mainly composed of a circuit board, a coin chute and a coin sorter. When we put a coin in the vending machine, the coin will first pass through two sets of light sensors, which can measure the diameter of the coin. The light sensor consists of an LED light-emitting device and a light-receiving sensor. The green light part represents the LED light-emitting diode, and the light it emits will be received by the opposite light-receiving sensor. When the light is blocked when a coin passes between the two, the sensor generates a corresponding signal. When the coin passes through the sensor, it will block the light. The control circuit board will calculate the time the coin blocks the light and the time difference between the two sets of sensors, and the diameter of the coin can be measured. A dollar coin is larger in diameter than a fifty cent coin and blocks light from the sensor for longer. Not only that, the light sensor can also accurately measure the diameter of the coin and judge whether it is a circulating coin, which is a step to identify the authenticity. The genuine coin adopts the nickel-plated steel core process, which has its special electromagnetic characteristics. The specially designed high-frequency oscillation circuit can effectively distinguish the electromagnetic impedance of the metal material, and further screen the authenticity. Specifically, the coin will pass through an electromagnet composed of two copper coils, whose role is to detect the metal composition and electromagnetic spectrum characteristics in the coin. Metal cutting magnetic lines of force will induce current, and the current will generate a magnetic field. According to the principle of magnetoelectric mutual conversion, the copper coil will become an electromagnet when there is current, forming a fixed magnetic field. When the coin passes by, the magnetic field will be cut, thereby changing the copper coil The amount of current in the coil. In addition, different metal components have different effects on the magnetic field in the copper coil. The single-chip microcomputer can determine the coins corresponding to different metal components according to the change of the induced current in the copper coil. As long as the coins pass through the above two identification devices, the unmanned vending machine can sense the denomination of the coins in less than one second, and then guide them into the corresponding coin slot to realize the classification and storage according to the denomination. Of course, the recognition device also has a very low probability of not being able to recognize the real coin, or accurately recognizing the counterfeit coin, and then it will re-enter the coin return port. This is why we sometimes put coins in and they come back out. If they are genuine coins, they can be re-inserted, but if they are counterfeit coins, don’t waste your energy. Counterfeit currency vending machines will not accept them. After the machine recognizes the calculated amount, it will automatically ship out. If change is needed, the coin storage slot will slowly release the coins one by one according to the corresponding amount. The development of unmanned vending machines in the direction of electronic payment is a major trend. Maybe coin-operated payment will be eliminated in the near future, because the new face-scanning payment is too advantageous, and you can buy things without a mobile phone. Haloo Automation Equipment Co., Ltd is mainly engaged in unmanned vending machines, automatic vending machines, and professional vending machine manufacturers have a complete after-sales service system. Let customers buy personalized products at standard money prices.

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