CN1855153A - Coin feeder and discrimination of banknotes and coins - Google Patents

Abstract

A kind of money-box using for the self-service fare collection bus relates to two sets of examining machine and number sign processor for coin and bank note. When the bank note was put into the bank note entrance, two idler wheels run oppositely to spread the two-double bank note and display it to the driver and passengers through the visualized window to avoid the incomplete bank note. When the coins were put into the coin entrance, the backset sensor gathers the frequency change of the coins when they passing through the high frequency and uses the FFT (Fast Fourier Transform Algorithm) to confirm the frequency change. Compare with the characteristic frequency of the real money to identify it and its par value. Reckon in the real money and eliminate the fake money.

Description

Coin-box and bank note thereof, coin recognizing method method

1, affiliated technical field

Patent of the present invention has proposed a kind of Mechatronic device that can carry out differential count and total value accumulative total to the coin of different denominations, particularly can discern common on the market coin counterfeit money, it is rejected out, and provide voice suggestion; In addition, this device can also check whether bank note is incomplete.The present invention can be used for the self-service ticketing device of public transit system, or other automatic sale apparatus.

2, background technology

The general employing of self-service ticketing bus only has the coin-box of a transparent windows, and when the passenger inserted coins, the driver judged whether to throw enough denominations by view window, and whether counterfeit money, worn coin are arranged.More as the passenger, or insert coins quantity more for a long time, the driver is difficult to notice each details of inserting coins, and can't avoid receiving counterfeit money, worn coin.At present, this problem has had a strong impact on the economic benefit of public transport company.

According to existing document, existing coin sorts and examines pseudo-technology, its identification device mainly adopts two kinds of methods: a kind of is with the coin surface of rayed by the coin road, by receiving from the reflected light on coin surface and generating the pattern characteristics data of coin, carries out coin through Flame Image Process and differentiates; Another kind method is to generate an electromagnetic field on the coin road that coin passes through with oscillator coil, can produce vortex flow in the body when coin passes through, and by vortex flow and the oscillator coil mutual inductance that produces in the coin, causes that the coin discriminating is carried out in the variation of circuit inductance amount.Preceding a kind of discrimination method precision height, but cost height; A kind of method cost in back is low, but the False Rate height.

Purpose of the present invention is improved existing discrimination method exactly, improves cost performance, and is applied to the coin-box of self-service ticketing automobile, or in the Vending Machine, is used for the pseudo-and counting of inspection of coin; Simultaneously, the method for the two rollers of employing displays the bank note of incompleteness, avoids the malicious act of a few passengers.

3, summary of the invention

The passenger can use currency or coin while taking a bus, and bank note is papery, and area is big, but it can fold, and covers the incompleteness of self easily; Coin is a metal, and area is little, and face amount is many, and the short time is not easy to see clearly.The present invention is directed to the unlike material of currency and coins, with both coin slot separately, adopt diverse ways to detect.

After bank note inserted notes here inlet, at first through a pair roller, the spacing scalable of roller adapted to different Currency Types.Roller is slowly rotation under the effect of motor, will rub with the hands the bank note that folds by friction and open, and whole money of generate is presented in face of driver and the passenger simultaneously by the transparent window on the coin-box, prevents the input of worn coin and false bank note.

When coin inserts coin when inlet, on coin passage, be placed with two eddy current sensors of height, be used to gather coin by the time internal vortex be coupled to signal in the coil; Utilize the method for digital signal processing, the signal that collects in the process of coin by sensor is carried out spectrum analysis, determine the frequency change that is produced when coin passes through.Because material, structure, diameter and the thickness of coin are different, all can produce unique influence to the frequency of high-frequency signal, integrate and just can know being the coin of which kind of value of money and whether counterfeit money is arranged by the coin road.During actual the use,, allow signal processor remember the characteristic frequency spectrum of existing par value coin in advance by the process of a kind of being called " study ", with coin by the time spectrum signal that obtained compare definite true and false of passing through the coin in coin road with the characteristic signal of storage.Consider that the spy is provided with appropriate frequency range, all is considered as genuine note within this scope owing to the minor impact to detectable signal such as surfaceness, greasy dirt; Be considered as counterfeit money outside the scope.Judged true and false after, genuine note is smoothly by detecting mouthful, and counting on corresponding value of money, respectively the value of inserting coins and total ticket value of receiving shown; After finding counterfeit money, processor sends instruction, by the action of electromagnet counterfeit money is laid the coin road, falls into the counterfeit money groove, and by auditory tone cues driver and passenger, does not produce counting this moment.

The sensor of this coin-box produces eddy current for the radio-frequency coil of the oscillator generation single-frequency signals of employing high stability by radio-frequency coil in coin, change electromagnetic field on every side, and then influence the frequency of coil medium-high frequency signal.Digital signal processing chip adopts fast fourier transformation algorithm that the output signal of eddy current type inductance sensor is carried out spectrum analysis.Adopt signal Spectrum Analysis, the difference between the coin eigenwert is bigger, distinguishes easily, the also easy various interference noises of filtering, precision height.Another advantage is: the typical characteristics of different denominations, unlike material, different editions, domestic and international coin is stored in storer, when distinguishing the coin of country variant,, need not coin-box is carried out other adjustment as long as change these parameters, simple and convenient, wide adaptability.

Fig. 1 is a structural drawing of the present invention.Wherein 1 is the coin-box shell, connects the coin receptacle that present pay-to-driver bus uses down, and coin enters the coin receptacle of bottom through the inspection spurious count, 2 is the bank note coin slot, 3 are folding bank note stranding opening mechanism, and 4 is visual windows, and 5 is digital display window, 6 is slot, 7 for rejecting the electromagnet of counterfeit money in the coin, and 8 are inspection spurious count telefault fixed support, the 9 coin roads for the coin rolling, 10 are the voice suggestion toy trumpet, the 11 counterfeit money cases for rejecting.

Fig. 2 is the circuit theory diagrams of coin-box.12 is the power supply of coin-box circuit, and 13 is digital signal processing chip, and 14 are counterfeit money rejecting executive circuit, 15 is the high stable oscillatory circuit, and higher-order of oscillation electromagnetic field is provided, and 16 is telefault, electromagnetic field is provided, and the variation of induction coin eddy current generation, 17 is coin to be detected (detection of dynamic), 18 is the frequency/voltage transducer, 19 is photoelectric detective circuit, 20 is that motor circuit is opened in folded coin stranding, and 21 is voice warning circuit, and 22 is digital display circuit.

4, embodiment

When the passenger uses bank note, from paper currency inlet 2 with the bank note input, photoelectric detective circuit 19 has detected bank note and has entered, process chip 13 is sent instruction, CD-ROM drive motor 20 begins to rotate, drive folded coin and rub opening mechanism 3---two rollers with the hands and do relative motion, the bank note that folds is rubbed with the hands opened, be presented in driver and passenger at the moment by visual windows 4.

When the passenger uses coin, coin 17 is dropped into from slot 5, roll downwards in the coin road 9 of the downward inclination of effect of self gravitation.Being fixed with telefault 16 on the fixed support 8, himself is the part of high stable oscillatory circuit 15; Coin by the time cause to such an extent that the variation of oscillation frequency is converted to voltage signal by voltage/frequency transducer 18, send into and carry out sampling processing in the digital signal processing chip 13, adopt fast fourier transformation algorithm determine coin 17 by the time frequency change that causes.Before formal the use, the coin of the monobasic of selection standard, five jiaos and a jiao is determined the frequency change of feature separately by the appeal method, and is stored in the signal processing chip.In the process of using, signal processing chip 13 with actual detected to frequency change and three category feature frequency spectrums compare: if meet characteristic frequency region, then signal processing chip 13 is with corresponding value of money addition, and show by digital display window 5---everyone number and receive the ticket fee sum and show in the lump of inserting coins can be divided, meanwhile, coin enters coin receptacle by the coin road; If do not meet all characteristic frequencies, then signal processing chip 13 is judged as counterfeit money, send instruction and reject executive circuit 14 to counterfeit money, these drives electromagnet 7 actions, counterfeit money is laid from the coin road, fall into counterfeit money box 11, meanwhile, voice warning circuit 21 is sounded, and prompt passengers is please heavily thrown.

Claims (3)

1, a kind of coin-box that can be used on the pay-to-driver bus is made of coin, bank note two cover testing agencies and digital signal processor.It is characterized in that:, adopt two to overlap independently testing agency's rejecting counterfeit money and worn coin respectively at the different situations of coin and bank note.

2, coin-box according to claim 1 is characterized in that: adopt two rollers by motor driven, folding bank note is launched, be beneficial to the driver and confirm whether be worn coin.

3, coin-box according to claim 1, it is characterized in that: adopt digital signal processing chip, and the method for fast fourier transform method that the output signal of eddy current type inductance sensor is carried out spectrum analysis, carry out the pseudo-and counting of inspection of coin according to the spectrum signature of different coins.

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