How do coin machines identify coins?
The metal raw materials of the 1 yuan, 50 cents and 1 dime coins currently issued in our country are special alloys specially used for coinage, so in When it enters the magnetic field generated by a specific high-frequency oscillation line composed of inductors and capacitors through the coin entrance, the difference in metal material and volume also has a slight difference in the influence of the inductance. The change in the inductance causes a change in the oscillation frequency; Then by detecting the change in frequency and comparing it with the set value, after determining a certain coin type, the frequency signal is converted into a voltage signal output through a narrow-band frequency selection circuit to complete the identification of metal coins.
Metal There are many types of coin recognizers, but the coin storage and ejection mechanisms are basically divided into two categories: one is a flat coin storage and a solenoid valve ejects coins; the other is a cylindrical coin storage and a stepper motor ejects coins. When coins After the electronic signal is recognized after being put in, the counterfeit coins and foreign objects are discharged, and the genuine coins are distributed according to the face value into different coin storage chambers by several groups of distribution solenoid valves for backup. When the electrical signal for the return of coins is received, the coins are returned through the The solenoid valve or coin return motor pull rod pushes out the coins in the lower part of the coin storage chamber according to the electrical signal program to complete the coin return and change function of the vending machine. How does the coin vending machine recognize currency
Coin edge How does the gear pattern coin machine sense coins
What is the principle of identifying coins through the infrared coin machine
I think there may be two conditions: one is the size; It's weight.
Another possibility is the magnetic reaction of the coin. If it is replaced by an iron piece, it may be sucked away? I guess can bus coin boxes detect counterfeit coins?
Some can!
How does a vending machine recognize coins?
The "coin recognition machine" currently on trial is equipped with an induction coil, which senses various factors such as the material and size of the coin. and find out the authenticity. According to technical personnel, different materials have different magnetic field changes, which can be analyzed, detected and identified through electronic technology. Higher-order detection can also use spectrum analysis.
The metal raw material of the 1 Yuan, 5 Jiao and 1 Jiao coins currently issued in our country is a special alloy specially used for coinage (usually alloy steel plated with nickel), so it is entered through the coin entrance. When a specific high-frequency oscillation circuit composed of an inductor and a capacitor generates a magnetic field, differences in metal material and volume also have slight differences in the influence of the inductance. Changes in the inductance cause changes in the oscillation frequency; and then by detecting changes in frequency , compare with the set value to determine a certain coin type, and then convert the frequency signal into a voltage signal output through a narrow-band frequency selection circuit to complete the identification of metal coins.
Identification principle
< p> Main identification indicators: diameter, material, thickness.The material is measured electromagnetically, using air-core coils or magnetic core coils. The number of coil groups is only one group, and the common number is six groups. Under working conditions, the coil and its peripheral circuits will oscillate at a special frequency (the frequency will be different if there are multiple coils). When a coin passes perpendicularly or parallel to the plane of the coil (different products have different methods), oscillation will occur. Frequency changes. The amplitude and direction (increase, decrease) of frequency changes caused by different materials are also different. After recording the changing characteristics of a certain coin, it becomes the basis for identifying the coin in use.
There is nothing specifically measured for thickness. In fact, this indicator is measured together with the material. Because even if coins of the same material are different in thickness, the resulting frequency changes will be quite different.
Diameter - The old-fashioned identification device uses a photoelectric tube array to identify the diameter. If the arrangement and combination are appropriate, the identification accuracy is not low (can answer 0.5mm). The newer ones all use eccentric or special-shaped coils for measurement. The basis is that the coin with a small diameter has less overlap with the coil, which also brings about differences in frequency changes. How do vending machines recognize coins and banknotes?
There is a coin system, so you don’t need to worry about this. I recommend Xingyuan.
The vending machine recognizes coins and banknotes through the coin recognition function.
The coin device is the core of the vending machine. Its main function is to confirm the authenticity of the inserted coins, sort the types of coins, and calculate the amount. If the amount invested reaches the value of the purchased item, a sell signal will be sent and the remaining money will be found.
The indicating device is used to indicate the type of product selected by the customer. The storage and vending device stores goods, receives sales instruction signals, and delivers the goods selected by customers to the delivery port. Generally, the coin device of a vending machine consists of a coin slot, a sorting device, an inspection device to confirm the authenticity of coins, a calculation device for calculating the amount, and a money change device. How to use an Apple coin machine to spit out more coins
It won’t work if you spit it out, but it will do it so that you don’t have to vote. Just find a piece of bicycle brake cable and make a circle on one end that is larger than a coin. You just use this to go in and out of the coin slot, and you can throw in as many coins as you want! How does a coin-operated machine distinguish real coins from counterfeit ones?
Coins are made of special alloys. The coin-operated machine has a vibrating path, and the coins produce shock waves along the way. The special detector detects different identification of the wave bands. The denomination is different and the same is true for identifying counterfeit currency.