Unmanned vending machine cash recognition black technology, this is how the true and false denominations of coins are recognized!

The modern sense of unmanned vending machine has been born for several decades, and it has been in the country for nearly two decades, and its popularity has happened in recent years. The development of domestic unmanned vending machines is still very rapid, almost directly past the coin-operated payment and directly entered the electronic payment era. Now the mainstream domestic unmanned vending machines can basically support mobile phone scan code payment and face payment. Some friends ask if there is a market for cash payment? In fact, cash payment still has an indispensable position in some specific places. For example, in elementary and middle schools, students who don’t have mobile phones can only pay in cash. After 80s, we have a special feeling for coins, because all the game halls were coin-operated back then. It was a kind of game machine-specific coin, which was much cheaper than RMB. Some people used game coins to invest in them. Can vending machines swindle out drinks? In fact, these people are too young, too simple, and the cash recognition module is not as simple as imagined. The identification of the denomination and authenticity of a coin is a very complicated process, let us reveal the secret. The coin recognition module in the unmanned vending machine is a very accurate instrument, which is mainly composed of a circuit board, a coin chute and a coin sorter. When you put a coin in the unmanned vending machine, the coin will first pass through two sets of light sensors, which can measure the diameter of the coin. The light sensor is composed of an LED light emitting device and a light receiving sensor. The green part represents the LED light-emitting diode, and the light it emits will be received by the light receiving sensor on the opposite side. When the coin passes between the two, the light is blocked, and the sensor generates a corresponding signal. When the coin passes the sensor, the light will be blocked. The control circuit board will calculate the time for the coin to block the light and the time difference between the light of the two sets of sensors, and then the diameter of the coin can be measured. The diameter of a dollar coin is larger than that of a fifty cent coin, and it takes longer to block the light of the sensor. Not only that, the light sensor can accurately measure the diameter of the coin to determine whether it is a circulating coin, which is the first step in distinguishing the authenticity. The real 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 function 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, when the copper coil has current, it will become an electromagnet, forming a fixed magnetic field. When the coin passes by, the magnetic field will be cut and the copper will be changed. The magnitude of the 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 coin passes through the above two identification devices, the unmanned vending machine can sense the denomination of the coin in less than one second, and then guide them to the corresponding coin slot to realize the sorting and storage according to the denomination. Of course, there is a very low probability that the identification device will not be able to identify the real currency, or accurately identify the counterfeit currency, then it will re-enter the coin refund port. This is why we sometimes put in coins and then back out. If it is a real coin, just reinvest it, but if it is a counterfeit coin, then don't waste energy. The counterfeit coin vending machine will not accept it. After the machine recognizes and counts the amount, it will automatically ship. If you need to find change, the coin storage slot will slowly release the coins one by one according to the corresponding amount. Therefore, the sound of change coins is a choppy sound at intervals, rather than falling down together. The development of unmanned vending machines towards electronic payment is a general trend. Perhaps coin-operated payment will be completely eliminated in the near future, because the new face payment is so advantageous that you can buy things without a mobile phone. As a strong unmanned vending machine manufacturer in the industry, haloo has developed various unmanned self-service devices that can support cash, mobile phone scan code and face payment!
is emerging as one of the most popular vending machine, moving beyond its vending machine manufacturers benefits, with conclusive scientific evidence suggesting the positive role play in commercial vending machine.
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